Class: Aws::KMS::Client

Inherits:
Seahorse::Client::Base show all
Includes:
ClientStubs
Defined in:
gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb

Overview

An API client for KMS. To construct a client, you need to configure a :region and :credentials.

client = Aws::KMS::Client.new(
  region: region_name,
  credentials: credentials,
  # ...
)

For details on configuring region and credentials see the developer guide.

See #initialize for a full list of supported configuration options.

Instance Attribute Summary

Attributes inherited from Seahorse::Client::Base

#config, #handlers

API Operations collapse

Instance Method Summary collapse

Methods included from ClientStubs

#api_requests, #stub_data, #stub_responses

Methods inherited from Seahorse::Client::Base

add_plugin, api, clear_plugins, define, new, #operation_names, plugins, remove_plugin, set_api, set_plugins

Methods included from Seahorse::Client::HandlerBuilder

#handle, #handle_request, #handle_response

Constructor Details

#initialize(options) ⇒ Client

Returns a new instance of Client.

Parameters:

  • options (Hash)

Options Hash (options):

  • :credentials (required, Aws::CredentialProvider)

    Your AWS credentials. This can be an instance of any one of the following classes:

    • Aws::Credentials - Used for configuring static, non-refreshing credentials.

    • Aws::SharedCredentials - Used for loading static credentials from a shared file, such as ~/.aws/config.

    • Aws::AssumeRoleCredentials - Used when you need to assume a role.

    • Aws::AssumeRoleWebIdentityCredentials - Used when you need to assume a role after providing credentials via the web.

    • Aws::SSOCredentials - Used for loading credentials from AWS SSO using an access token generated from aws login.

    • Aws::ProcessCredentials - Used for loading credentials from a process that outputs to stdout.

    • Aws::InstanceProfileCredentials - Used for loading credentials from an EC2 IMDS on an EC2 instance.

    • Aws::ECSCredentials - Used for loading credentials from instances running in ECS.

    • Aws::CognitoIdentityCredentials - Used for loading credentials from the Cognito Identity service.

    When :credentials are not configured directly, the following locations will be searched for credentials:

    • Aws.config[:credentials]
    • The :access_key_id, :secret_access_key, and :session_token options.
    • ENV['AWS_ACCESS_KEY_ID'], ENV['AWS_SECRET_ACCESS_KEY']
    • ~/.aws/credentials
    • ~/.aws/config
    • EC2/ECS IMDS instance profile - When used by default, the timeouts are very aggressive. Construct and pass an instance of Aws::InstanceProfileCredentails or Aws::ECSCredentials to enable retries and extended timeouts. Instance profile credential fetching can be disabled by setting ENV['AWS_EC2_METADATA_DISABLED'] to true.
  • :region (required, String)

    The AWS region to connect to. The configured :region is used to determine the service :endpoint. When not passed, a default :region is searched for in the following locations:

    • Aws.config[:region]
    • ENV['AWS_REGION']
    • ENV['AMAZON_REGION']
    • ENV['AWS_DEFAULT_REGION']
    • ~/.aws/credentials
    • ~/.aws/config
  • :access_key_id (String)
  • :active_endpoint_cache (Boolean) — default: false

    When set to true, a thread polling for endpoints will be running in the background every 60 secs (default). Defaults to false.

  • :adaptive_retry_wait_to_fill (Boolean) — default: true

    Used only in adaptive retry mode. When true, the request will sleep until there is sufficent client side capacity to retry the request. When false, the request will raise a RetryCapacityNotAvailableError and will not retry instead of sleeping.

  • :client_side_monitoring (Boolean) — default: false

    When true, client-side metrics will be collected for all API requests from this client.

  • :client_side_monitoring_client_id (String) — default: ""

    Allows you to provide an identifier for this client which will be attached to all generated client side metrics. Defaults to an empty string.

  • :client_side_monitoring_host (String) — default: "127.0.0.1"

    Allows you to specify the DNS hostname or IPv4 or IPv6 address that the client side monitoring agent is running on, where client metrics will be published via UDP.

  • :client_side_monitoring_port (Integer) — default: 31000

    Required for publishing client metrics. The port that the client side monitoring agent is running on, where client metrics will be published via UDP.

  • :client_side_monitoring_publisher (Aws::ClientSideMonitoring::Publisher) — default: Aws::ClientSideMonitoring::Publisher

    Allows you to provide a custom client-side monitoring publisher class. By default, will use the Client Side Monitoring Agent Publisher.

  • :convert_params (Boolean) — default: true

    When true, an attempt is made to coerce request parameters into the required types.

  • :correct_clock_skew (Boolean) — default: true

    Used only in standard and adaptive retry modes. Specifies whether to apply a clock skew correction and retry requests with skewed client clocks.

  • :disable_host_prefix_injection (Boolean) — default: false

    Set to true to disable SDK automatically adding host prefix to default service endpoint when available.

  • :endpoint (String)

    The client endpoint is normally constructed from the :region option. You should only configure an :endpoint when connecting to test or custom endpoints. This should be a valid HTTP(S) URI.

  • :endpoint_cache_max_entries (Integer) — default: 1000

    Used for the maximum size limit of the LRU cache storing endpoints data for endpoint discovery enabled operations. Defaults to 1000.

  • :endpoint_cache_max_threads (Integer) — default: 10

    Used for the maximum threads in use for polling endpoints to be cached, defaults to 10.

  • :endpoint_cache_poll_interval (Integer) — default: 60

    When :endpoint_discovery and :active_endpoint_cache is enabled, Use this option to config the time interval in seconds for making requests fetching endpoints information. Defaults to 60 sec.

  • :endpoint_discovery (Boolean) — default: false

    When set to true, endpoint discovery will be enabled for operations when available.

  • :log_formatter (Aws::Log::Formatter) — default: Aws::Log::Formatter.default

    The log formatter.

  • :log_level (Symbol) — default: :info

    The log level to send messages to the :logger at.

  • :logger (Logger)

    The Logger instance to send log messages to. If this option is not set, logging will be disabled.

  • :max_attempts (Integer) — default: 3

    An integer representing the maximum number attempts that will be made for a single request, including the initial attempt. For example, setting this value to 5 will result in a request being retried up to 4 times. Used in standard and adaptive retry modes.

  • :profile (String) — default: "default"

    Used when loading credentials from the shared credentials file at HOME/.aws/credentials. When not specified, 'default' is used.

  • :retry_backoff (Proc)

    A proc or lambda used for backoff. Defaults to 2**retries * retry_base_delay. This option is only used in the legacy retry mode.

  • :retry_base_delay (Float) — default: 0.3

    The base delay in seconds used by the default backoff function. This option is only used in the legacy retry mode.

  • :retry_jitter (Symbol) — default: :none

    A delay randomiser function used by the default backoff function. Some predefined functions can be referenced by name - :none, :equal, :full, otherwise a Proc that takes and returns a number. This option is only used in the legacy retry mode.

    @see https://www.awsarchitectureblog.com/2015/03/backoff.html

  • :retry_limit (Integer) — default: 3

    The maximum number of times to retry failed requests. Only ~ 500 level server errors and certain ~ 400 level client errors are retried. Generally, these are throttling errors, data checksum errors, networking errors, timeout errors, auth errors, endpoint discovery, and errors from expired credentials. This option is only used in the legacy retry mode.

  • :retry_max_delay (Integer) — default: 0

    The maximum number of seconds to delay between retries (0 for no limit) used by the default backoff function. This option is only used in the legacy retry mode.

  • :retry_mode (String) — default: "legacy"

    Specifies which retry algorithm to use. Values are:

    • legacy - The pre-existing retry behavior. This is default value if no retry mode is provided.

    • standard - A standardized set of retry rules across the AWS SDKs. This includes support for retry quotas, which limit the number of unsuccessful retries a client can make.

    • adaptive - An experimental retry mode that includes all the functionality of standard mode along with automatic client side throttling. This is a provisional mode that may change behavior in the future.

  • :secret_access_key (String)
  • :session_token (String)
  • :simple_json (Boolean) — default: false

    Disables request parameter conversion, validation, and formatting. Also disable response data type conversions. This option is useful when you want to ensure the highest level of performance by avoiding overhead of walking request parameters and response data structures.

    When :simple_json is enabled, the request parameters hash must be formatted exactly as the DynamoDB API expects.

  • :stub_responses (Boolean) — default: false

    Causes the client to return stubbed responses. By default fake responses are generated and returned. You can specify the response data to return or errors to raise by calling ClientStubs#stub_responses. See ClientStubs for more information.

    Please note When response stubbing is enabled, no HTTP requests are made, and retries are disabled.

  • :use_dualstack_endpoint (Boolean)

    When set to true, dualstack enabled endpoints (with .aws TLD) will be used if available.

  • :use_fips_endpoint (Boolean)

    When set to true, fips compatible endpoints will be used if available. When a fips region is used, the region is normalized and this config is set to true.

  • :validate_params (Boolean) — default: true

    When true, request parameters are validated before sending the request.

  • :http_proxy (URI::HTTP, String)

    A proxy to send requests through. Formatted like 'http://proxy.com:123'.

  • :http_open_timeout (Float) — default: 15

    The number of seconds to wait when opening a HTTP session before raising a Timeout::Error.

  • :http_read_timeout (Integer) — default: 60

    The default number of seconds to wait for response data. This value can safely be set per-request on the session.

  • :http_idle_timeout (Float) — default: 5

    The number of seconds a connection is allowed to sit idle before it is considered stale. Stale connections are closed and removed from the pool before making a request.

  • :http_continue_timeout (Float) — default: 1

    The number of seconds to wait for a 100-continue response before sending the request body. This option has no effect unless the request has "Expect" header set to "100-continue". Defaults to nil which disables this behaviour. This value can safely be set per request on the session.

  • :http_wire_trace (Boolean) — default: false

    When true, HTTP debug output will be sent to the :logger.

  • :ssl_verify_peer (Boolean) — default: true

    When true, SSL peer certificates are verified when establishing a connection.

  • :ssl_ca_bundle (String)

    Full path to the SSL certificate authority bundle file that should be used when verifying peer certificates. If you do not pass :ssl_ca_bundle or :ssl_ca_directory the the system default will be used if available.

  • :ssl_ca_directory (String)

    Full path of the directory that contains the unbundled SSL certificate authority files for verifying peer certificates. If you do not pass :ssl_ca_bundle or :ssl_ca_directory the the system default will be used if available.



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 345

def initialize(*args)
  super
end

Instance Method Details

#cancel_key_deletion(params = {}) ⇒ Types::CancelKeyDeletionResponse

Cancels the deletion of a KMS key. When this operation succeeds, the key state of the KMS key is Disabled. To enable the KMS key, use EnableKey.

For more information about scheduling and canceling deletion of a KMS key, see Deleting KMS keys in the Key Management Service Developer Guide.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:CancelKeyDeletion (key policy)

Related operations: ScheduleKeyDeletion

Examples:

Example: To cancel deletion of a KMS key


# The following example cancels deletion of the specified KMS key.

resp = client.cancel_key_deletion({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key whose deletion you are canceling. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

resp.to_h outputs the following:
{
  key_id: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The ARN of the KMS key whose deletion you canceled.
}

Request syntax with placeholder values


resp = client.cancel_key_deletion({
  key_id: "KeyIdType", # required
})

Response structure


resp.key_id #=> String

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies the KMS key whose deletion is being canceled.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 423

def cancel_key_deletion(params = {}, options = {})
  req = build_request(:cancel_key_deletion, params)
  req.send_request(options)
end

#connect_custom_key_store(params = {}) ⇒ Struct

Connects or reconnects a custom key store to its associated CloudHSM cluster.

The custom key store must be connected before you can create KMS keys in the key store or use the KMS keys it contains. You can disconnect and reconnect a custom key store at any time.

To connect a custom key store, its associated CloudHSM cluster must have at least one active HSM. To get the number of active HSMs in a cluster, use the DescribeClusters operation. To add HSMs to the cluster, use the CreateHsm operation. Also, the kmsuser crypto user (CU) must not be logged into the cluster. This prevents KMS from using this account to log in.

The connection process can take an extended amount of time to complete; up to 20 minutes. This operation starts the connection process, but it does not wait for it to complete. When it succeeds, this operation quickly returns an HTTP 200 response and a JSON object with no properties. However, this response does not indicate that the custom key store is connected. To get the connection state of the custom key store, use the DescribeCustomKeyStores operation.

During the connection process, KMS finds the CloudHSM cluster that is associated with the custom key store, creates the connection infrastructure, connects to the cluster, logs into the CloudHSM client as the kmsuser CU, and rotates its password.

The ConnectCustomKeyStore operation might fail for various reasons. To find the reason, use the DescribeCustomKeyStores operation and see the ConnectionErrorCode in the response. For help interpreting the ConnectionErrorCode, see CustomKeyStoresListEntry.

To fix the failure, use the DisconnectCustomKeyStore operation to disconnect the custom key store, correct the error, use the UpdateCustomKeyStore operation if necessary, and then use ConnectCustomKeyStore again.

If you are having trouble connecting or disconnecting a custom key store, see Troubleshooting a Custom Key Store in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a custom key store in a different Amazon Web Services account.

Required permissions: kms:ConnectCustomKeyStore (IAM policy)

Related operations

  • CreateCustomKeyStore

  • DeleteCustomKeyStore

  • DescribeCustomKeyStores

  • DisconnectCustomKeyStore

  • UpdateCustomKeyStore

Examples:

Example: To connect a custom key store to its CloudHSM cluster


# This example connects an AWS KMS custom key store to its AWS CloudHSM cluster. This operation does not return any data.
# To verify that the custom key store is connected, use the <code>DescribeCustomKeyStores</code> operation.

resp = client.connect_custom_key_store({
  custom_key_store_id: "cks-1234567890abcdef0", # The ID of the AWS KMS custom key store.
})

resp.to_h outputs the following:
{
}

Request syntax with placeholder values


resp = client.connect_custom_key_store({
  custom_key_store_id: "CustomKeyStoreIdType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :custom_key_store_id (required, String)

    Enter the key store ID of the custom key store that you want to connect. To find the ID of a custom key store, use the DescribeCustomKeyStores operation.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 526

def connect_custom_key_store(params = {}, options = {})
  req = build_request(:connect_custom_key_store, params)
  req.send_request(options)
end

#create_alias(params = {}) ⇒ Struct

Creates a friendly name for a KMS key.

Adding, deleting, or updating an alias can allow or deny permission to the KMS key. For details, see Using ABAC in KMS in the Key Management Service Developer Guide.

You can use an alias to identify a KMS key in the KMS console, in the DescribeKey operation and in cryptographic operations, such as Encrypt and GenerateDataKey. You can also change the KMS key that's associated with the alias (UpdateAlias) or delete the alias (DeleteAlias) at any time. These operations don't affect the underlying KMS key.

You can associate the alias with any customer managed key in the same Amazon Web Services Region. Each alias is associated with only one KMS key at a time, but a KMS key can have multiple aliases. A valid KMS key is required. You can't create an alias without a KMS key.

The alias must be unique in the account and Region, but you can have aliases with the same name in different Regions. For detailed information about aliases, see Using aliases in the Key Management Service Developer Guide.

This operation does not return a response. To get the alias that you created, use the ListAliases operation.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on an alias in a different Amazon Web Services account.

Required permissions

For details, see Controlling access to aliases in the Key Management Service Developer Guide.

Related operations:

  • DeleteAlias

  • ListAliases

  • UpdateAlias

Examples:

Example: To create an alias


# The following example creates an alias for the specified KMS key.

resp = client.create_alias({
  alias_name: "alias/ExampleAlias", # The alias to create. Aliases must begin with 'alias/'. Do not use aliases that begin with 'alias/aws' because they are reserved for use by AWS.
  target_key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key whose alias you are creating. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

Request syntax with placeholder values


resp = client.create_alias({
  alias_name: "AliasNameType", # required
  target_key_id: "KeyIdType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :alias_name (required, String)

    Specifies the alias name. This value must begin with alias/ followed by a name, such as alias/ExampleAlias.

    The AliasName value must be string of 1-256 characters. It can contain only alphanumeric characters, forward slashes (/), underscores (_), and dashes (-). The alias name cannot begin with alias/aws/. The alias/aws/ prefix is reserved for Amazon Web Services managed keys.

  • :target_key_id (required, String)

    Associates the alias with the specified customer managed key. The KMS key must be in the same Amazon Web Services Region.

    A valid key ID is required. If you supply a null or empty string value, this operation returns an error.

    For help finding the key ID and ARN, see Finding the Key ID and ARN in the Key Management Service Developer Guide .

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 656

def create_alias(params = {}, options = {})
  req = build_request(:create_alias, params)
  req.send_request(options)
end

#create_custom_key_store(params = {}) ⇒ Types::CreateCustomKeyStoreResponse

Creates a custom key store that is associated with an CloudHSM cluster that you own and manage.

This operation is part of the Custom Key Store feature feature in KMS, which combines the convenience and extensive integration of KMS with the isolation and control of a single-tenant key store.

Before you create the custom key store, you must assemble the required elements, including an CloudHSM cluster that fulfills the requirements for a custom key store. For details about the required elements, see Assemble the Prerequisites in the Key Management Service Developer Guide.

When the operation completes successfully, it returns the ID of the new custom key store. Before you can use your new custom key store, you need to use the ConnectCustomKeyStore operation to connect the new key store to its CloudHSM cluster. Even if you are not going to use your custom key store immediately, you might want to connect it to verify that all settings are correct and then disconnect it until you are ready to use it.

For help with failures, see Troubleshooting a Custom Key Store in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a custom key store in a different Amazon Web Services account.

Required permissions: kms:CreateCustomKeyStore (IAM policy).

Related operations:

  • ConnectCustomKeyStore

  • DeleteCustomKeyStore

  • DescribeCustomKeyStores

  • DisconnectCustomKeyStore

  • UpdateCustomKeyStore

Examples:

Example: To create an AWS CloudHSM custom key store


# This example creates a custom key store that is associated with an AWS CloudHSM cluster.

resp = client.create_custom_key_store({
  cloud_hsm_cluster_id: "cluster-1a23b4cdefg", # The ID of the CloudHSM cluster.
  custom_key_store_name: "ExampleKeyStore", # A friendly name for the custom key store.
  key_store_password: "kmsPswd", # The password for the kmsuser CU account in the specified cluster.
  trust_anchor_certificate: "<certificate-goes-here>", # The content of the customerCA.crt file that you created when you initialized the cluster.
})

resp.to_h outputs the following:
{
  custom_key_store_id: "cks-1234567890abcdef0", # The ID of the new custom key store.
}

Request syntax with placeholder values


resp = client.create_custom_key_store({
  custom_key_store_name: "CustomKeyStoreNameType", # required
  cloud_hsm_cluster_id: "CloudHsmClusterIdType", # required
  trust_anchor_certificate: "TrustAnchorCertificateType", # required
  key_store_password: "KeyStorePasswordType", # required
})

Response structure


resp.custom_key_store_id #=> String

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :custom_key_store_name (required, String)

    Specifies a friendly name for the custom key store. The name must be unique in your Amazon Web Services account.

  • :cloud_hsm_cluster_id (required, String)

    Identifies the CloudHSM cluster for the custom key store. Enter the cluster ID of any active CloudHSM cluster that is not already associated with a custom key store. To find the cluster ID, use the DescribeClusters operation.

  • :trust_anchor_certificate (required, String)

    Enter the content of the trust anchor certificate for the cluster. This is the content of the customerCA.crt file that you created when you initialized the cluster.

  • :key_store_password (required, String)

    Enter the password of the kmsuser crypto user (CU) account in the specified CloudHSM cluster. KMS logs into the cluster as this user to manage key material on your behalf.

    The password must be a string of 7 to 32 characters. Its value is case sensitive.

    This parameter tells KMS the kmsuser account password; it does not change the password in the CloudHSM cluster.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 786

def create_custom_key_store(params = {}, options = {})
  req = build_request(:create_custom_key_store, params)
  req.send_request(options)
end

#create_grant(params = {}) ⇒ Types::CreateGrantResponse

Adds a grant to a KMS key.

A grant is a policy instrument that allows Amazon Web Services principals to use KMS keys in cryptographic operations. It also can allow them to view a KMS key (DescribeKey) and create and manage grants. When authorizing access to a KMS key, grants are considered along with key policies and IAM policies. Grants are often used for temporary permissions because you can create one, use its permissions, and delete it without changing your key policies or IAM policies.

For detailed information about grants, including grant terminology, see Using grants in the Key Management Service Developer Guide . For examples of working with grants in several programming languages, see Programming grants.

The CreateGrant operation returns a GrantToken and a GrantId.

  • When you create, retire, or revoke a grant, there might be a brief delay, usually less than five minutes, until the grant is available throughout KMS. This state is known as eventual consistency. Once the grant has achieved eventual consistency, the grantee principal can use the permissions in the grant without identifying the grant.

    However, to use the permissions in the grant immediately, use the GrantToken that CreateGrant returns. For details, see Using a grant token in the Key Management Service Developer Guide .

  • The CreateGrant operation also returns a GrantId. You can use the GrantId and a key identifier to identify the grant in the RetireGrant and RevokeGrant operations. To find the grant ID, use the ListGrants or ListRetirableGrants operations.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: Yes. To perform this operation on a KMS key in a different Amazon Web Services account, specify the key ARN in the value of the KeyId parameter.

Required permissions: kms:CreateGrant (key policy)

Related operations:

  • ListGrants

  • ListRetirableGrants

  • RetireGrant

  • RevokeGrant

Examples:

Example: To create a grant


# The following example creates a grant that allows the specified IAM role to encrypt data with the specified KMS key.

resp = client.create_grant({
  grantee_principal: "arn:aws:iam::111122223333:role/ExampleRole", # The identity that is given permission to perform the operations specified in the grant.
  key_id: "arn:aws:kms:us-east-2:444455556666:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key to which the grant applies. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
  operations: [
    "Encrypt", 
    "Decrypt", 
  ], # A list of operations that the grant allows.
})

resp.to_h outputs the following:
{
  grant_id: "0c237476b39f8bc44e45212e08498fbe3151305030726c0590dd8d3e9f3d6a60", # The unique identifier of the grant.
  grant_token: "AQpAM2RhZTk1MGMyNTk2ZmZmMzEyYWVhOWViN2I1MWM4Mzc0MWFiYjc0ZDE1ODkyNGFlNTIzODZhMzgyZjBlNGY3NiKIAgEBAgB4Pa6VDCWW__MSrqnre1HIN0Grt00ViSSuUjhqOC8OT3YAAADfMIHcBgkqhkiG9w0BBwaggc4wgcsCAQAwgcUGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMmqLyBTAegIn9XlK5AgEQgIGXZQjkBcl1dykDdqZBUQ6L1OfUivQy7JVYO2-ZJP7m6f1g8GzV47HX5phdtONAP7K_HQIflcgpkoCqd_fUnE114mSmiagWkbQ5sqAVV3ov-VeqgrvMe5ZFEWLMSluvBAqdjHEdMIkHMlhlj4ENZbzBfo9Wxk8b8SnwP4kc4gGivedzFXo-dwN8fxjjq_ZZ9JFOj2ijIbj5FyogDCN0drOfi8RORSEuCEmPvjFRMFAwcmwFkN2NPp89amA", # The grant token.
}

Request syntax with placeholder values


resp = client.create_grant({
  key_id: "KeyIdType", # required
  grantee_principal: "PrincipalIdType", # required
  retiring_principal: "PrincipalIdType",
  operations: ["Decrypt"], # required, accepts Decrypt, Encrypt, GenerateDataKey, GenerateDataKeyWithoutPlaintext, ReEncryptFrom, ReEncryptTo, Sign, Verify, GetPublicKey, CreateGrant, RetireGrant, DescribeKey, GenerateDataKeyPair, GenerateDataKeyPairWithoutPlaintext
  constraints: {
    encryption_context_subset: {
      "EncryptionContextKey" => "EncryptionContextValue",
    },
    encryption_context_equals: {
      "EncryptionContextKey" => "EncryptionContextValue",
    },
  },
  grant_tokens: ["GrantTokenType"],
  name: "GrantNameType",
})

Response structure


resp.grant_token #=> String
resp.grant_id #=> String

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies the KMS key for the grant. The grant gives principals permission to use this KMS key.

    Specify the key ID or key ARN of the KMS key. To specify a KMS key in a different Amazon Web Services account, you must use the key ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :grantee_principal (required, String)

    The identity that gets the permissions specified in the grant.

    To specify the principal, use the Amazon Resource Name (ARN) of an Amazon Web Services principal. Valid Amazon Web Services principals include Amazon Web Services accounts (root), IAM users, IAM roles, federated users, and assumed role users. For examples of the ARN syntax to use for specifying a principal, see Amazon Web Services Identity and Access Management (IAM) in the Example ARNs section of the Amazon Web Services General Reference.

  • :retiring_principal (String)

    The principal that has permission to use the RetireGrant operation to retire the grant.

    To specify the principal, use the Amazon Resource Name (ARN) of an Amazon Web Services principal. Valid Amazon Web Services principals include Amazon Web Services accounts (root), IAM users, federated users, and assumed role users. For examples of the ARN syntax to use for specifying a principal, see Amazon Web Services Identity and Access Management (IAM) in the Example ARNs section of the Amazon Web Services General Reference.

    The grant determines the retiring principal. Other principals might have permission to retire the grant or revoke the grant. For details, see RevokeGrant and Retiring and revoking grants in the Key Management Service Developer Guide.

  • :operations (required, Array<String>)

    A list of operations that the grant permits.

    The operation must be supported on the KMS key. For example, you cannot create a grant for a symmetric KMS key that allows the Sign operation, or a grant for an asymmetric KMS key that allows the GenerateDataKey operation. If you try, KMS returns a ValidationError exception. For details, see Grant operations in the Key Management Service Developer Guide.

  • :constraints (Types::GrantConstraints)

    Specifies a grant constraint.

    KMS supports the EncryptionContextEquals and EncryptionContextSubset grant constraints. Each constraint value can include up to 8 encryption context pairs. The encryption context value in each constraint cannot exceed 384 characters.

    These grant constraints allow the permissions in the grant only when the encryption context in the request matches (EncryptionContextEquals) or includes (EncryptionContextSubset) the encryption context specified in this structure. For information about grant constraints, see Using grant constraints in the Key Management Service Developer Guide. For more information about encryption context, see Encryption Context in the Key Management Service Developer Guide .

    The encryption context grant constraints are supported only on operations that include an encryption context. You cannot use an encryption context grant constraint for cryptographic operations with asymmetric KMS keys or for management operations, such as DescribeKey or RetireGrant.

  • :grant_tokens (Array<String>)

    A list of grant tokens.

    Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.

  • :name (String)

    A friendly name for the grant. Use this value to prevent the unintended creation of duplicate grants when retrying this request.

    When this value is absent, all CreateGrant requests result in a new grant with a unique GrantId even if all the supplied parameters are identical. This can result in unintended duplicates when you retry the CreateGrant request.

    When this value is present, you can retry a CreateGrant request with identical parameters; if the grant already exists, the original GrantId is returned without creating a new grant. Note that the returned grant token is unique with every CreateGrant request, even when a duplicate GrantId is returned. All grant tokens for the same grant ID can be used interchangeably.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 1032

def create_grant(params = {}, options = {})
  req = build_request(:create_grant, params)
  req.send_request(options)
end

#create_key(params = {}) ⇒ Types::CreateKeyResponse

Creates a unique customer managed KMS key in your Amazon Web Services account and Region.

KMS is replacing the term customer master key (CMK) with KMS key and KMS key. The concept has not changed. To prevent breaking changes, KMS is keeping some variations of this term.

You can use the CreateKey operation to create symmetric or asymmetric KMS keys.

  • Symmetric KMS keys contain a 256-bit symmetric key that never leaves KMS unencrypted. To use the KMS key, you must call KMS. You can use a symmetric KMS key to encrypt and decrypt small amounts of data, but they are typically used to generate data keys and data keys pairs. For details, see GenerateDataKey and GenerateDataKeyPair.

  • Asymmetric KMS keys can contain an RSA key pair or an Elliptic Curve (ECC) key pair. The private key in an asymmetric KMS key never leaves KMS unencrypted. However, you can use the GetPublicKey operation to download the public key so it can be used outside of KMS. KMS keys with RSA key pairs can be used to encrypt or decrypt data or sign and verify messages (but not both). KMS keys with ECC key pairs can be used only to sign and verify messages.

For information about symmetric and asymmetric KMS keys, see Using Symmetric and Asymmetric KMS keys in the Key Management Service Developer Guide.

To create different types of KMS keys, use the following guidance:

Asymmetric KMS keys

To create an asymmetric KMS key, use the KeySpec parameter to specify the type of key material in the KMS key. Then, use the KeyUsage parameter to determine whether the KMS key will be used to encrypt and decrypt or sign and verify. You can't change these properties after the KMS key is created.

Symmetric KMS keys

When creating a symmetric KMS key, you don't need to specify the KeySpec or KeyUsage parameters. The default value for KeySpec, SYMMETRIC_DEFAULT, and the default value for KeyUsage, ENCRYPT_DECRYPT, are the only valid values for symmetric KMS keys.

Multi-Region primary keys
Imported key material

To create a multi-Region primary key in the local Amazon Web Services Region, use the MultiRegion parameter with a value of True. To create a multi-Region replica key, that is, a KMS key with the same key ID and key material as a primary key, but in a different Amazon Web Services Region, use the ReplicateKey operation. To change a replica key to a primary key, and its primary key to a replica key, use the UpdatePrimaryRegion operation.

This operation supports multi-Region keys, an KMS feature that lets you create multiple interoperable KMS keys in different Amazon Web Services Regions. Because these KMS keys have the same key ID, key material, and other metadata, you can use them interchangeably to encrypt data in one Amazon Web Services Region and decrypt it in a different Amazon Web Services Region without re-encrypting the data or making a cross-Region call. For more information about multi-Region keys, see Using multi-Region keys in the Key Management Service Developer Guide.

You can create symmetric and asymmetric multi-Region keys and multi-Region keys with imported key material. You cannot create multi-Region keys in a custom key store.

To import your own key material, begin by creating a symmetric KMS key with no key material. To do this, use the Origin parameter of CreateKey with a value of EXTERNAL. Next, use GetParametersForImport operation to get a public key and import token, and use the public key to encrypt your key material. Then, use ImportKeyMaterial with your import token to import the key material. For step-by-step instructions, see Importing Key Material in the Key Management Service Developer Guide . You cannot import the key material into an asymmetric KMS key.

To create a multi-Region primary key with imported key material, use the Origin parameter of CreateKey with a value of EXTERNAL and the MultiRegion parameter with a value of True. To create replicas of the multi-Region primary key, use the ReplicateKey operation. For more information about multi-Region keys, see Using multi-Region keys in the Key Management Service Developer Guide.

Custom key store

To create a symmetric KMS key in a custom key store, use the CustomKeyStoreId parameter to specify the custom key store. You must also use the Origin parameter with a value of AWS_CLOUDHSM. The CloudHSM cluster that is associated with the custom key store must have at least two active HSMs in different Availability Zones in the Amazon Web Services Region.

You cannot create an asymmetric KMS key in a custom key store. For information about custom key stores in KMS see Using Custom Key Stores in the Key Management Service Developer Guide .

Cross-account use: No. You cannot use this operation to create a KMS key in a different Amazon Web Services account.

Required permissions: kms:CreateKey (IAM policy). To use the Tags parameter, kms:TagResource (IAM policy). For examples and information about related permissions, see Allow a user to create KMS keys in the Key Management Service Developer Guide.

Related operations:

  • DescribeKey

  • ListKeys

  • ScheduleKeyDeletion

Examples:

Example: To create a KMS key


# The following example creates a symmetric KMS key for encryption and decryption. No parameters are required for this
# operation.

resp = client.create_key({
})

resp.to_h outputs the following:
{
  key_metadata: {
    aws_account_id: "111122223333", 
    arn: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", 
    creation_date: Time.parse("2017-07-05T14:04:55-07:00"), 
    customer_master_key_spec: "SYMMETRIC_DEFAULT", 
    description: "", 
    enabled: true, 
    encryption_algorithms: [
      "SYMMETRIC_DEFAULT", 
    ], 
    key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", 
    key_manager: "CUSTOMER", 
    key_spec: "SYMMETRIC_DEFAULT", 
    key_state: "Enabled", 
    key_usage: "ENCRYPT_DECRYPT", 
    multi_region: false, 
    origin: "AWS_KMS", 
  }, # Detailed information about the KMS key that this operation creates.
}

Example: To create an asymmetric RSA KMS key for encryption and decryption


# This example creates a KMS key that contains an asymmetric RSA key pair for encryption and decryption. The key spec and
# key usage can't be changed after the key is created.

resp = client.create_key({
  key_spec: "RSA_4096", # Describes the type of key material in the KMS key.
  key_usage: "ENCRYPT_DECRYPT", # The cryptographic operations for which you can use the KMS key.
})

resp.to_h outputs the following:
{
  key_metadata: {
    aws_account_id: "111122223333", 
    arn: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", 
    creation_date: Time.parse("2021-04-05T14:04:55-07:00"), 
    customer_master_key_spec: "RSA_4096", 
    description: "", 
    enabled: true, 
    encryption_algorithms: [
      "RSAES_OAEP_SHA_1", 
      "RSAES_OAEP_SHA_256", 
    ], 
    key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", 
    key_manager: "CUSTOMER", 
    key_spec: "RSA_4096", 
    key_state: "Enabled", 
    key_usage: "ENCRYPT_DECRYPT", 
    multi_region: false, 
    origin: "AWS_KMS", 
  }, # Detailed information about the KMS key that this operation creates.
}

Example: To create an asymmetric elliptic curve KMS key for signing and verification


# This example creates a KMS key that contains an asymmetric elliptic curve (ECC) key pair for signing and verification.
# The key usage is required even though "SIGN_VERIFY" is the only valid value for ECC KMS keys. The key spec and key usage
# can't be changed after the key is created.

resp = client.create_key({
  key_spec: "ECC_NIST_P521", # Describes the type of key material in the KMS key.
  key_usage: "SIGN_VERIFY", # The cryptographic operations for which you can use the KMS key.
})

resp.to_h outputs the following:
{
  key_metadata: {
    aws_account_id: "111122223333", 
    arn: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", 
    creation_date: Time.parse("2019-12-02T07:48:55-07:00"), 
    customer_master_key_spec: "ECC_NIST_P521", 
    description: "", 
    enabled: true, 
    key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", 
    key_manager: "CUSTOMER", 
    key_spec: "ECC_NIST_P521", 
    key_state: "Enabled", 
    key_usage: "SIGN_VERIFY", 
    multi_region: false, 
    origin: "AWS_KMS", 
    signing_algorithms: [
      "ECDSA_SHA_512", 
    ], 
  }, # Detailed information about the KMS key that this operation creates.
}

Example: To create a multi-Region primary KMS key


# This example creates a multi-Region primary symmetric encryption key. Because the default values for all parameters
# create a symmetric encryption key, only the MultiRegion parameter is required for this KMS key.

resp = client.create_key({
  multi_region: true, # Indicates whether the KMS key is a multi-Region (True) or regional (False) key.
})

resp.to_h outputs the following:
{
  key_metadata: {
    aws_account_id: "111122223333", 
    arn: "arn:aws:kms:us-west-2:111122223333:key/mrk-1234abcd12ab34cd56ef12345678990ab", 
    creation_date: Time.parse("2021-09-02T016:15:21-09:00"), 
    customer_master_key_spec: "SYMMETRIC_DEFAULT", 
    description: "", 
    enabled: true, 
    encryption_algorithms: [
      "SYMMETRIC_DEFAULT", 
    ], 
    key_id: "mrk-1234abcd12ab34cd56ef12345678990ab", 
    key_manager: "CUSTOMER", 
    key_spec: "SYMMETRIC_DEFAULT", 
    key_state: "Enabled", 
    key_usage: "ENCRYPT_DECRYPT", 
    multi_region: true, 
    multi_region_configuration: {
      multi_region_key_type: "PRIMARY", 
      primary_key: {
        arn: "arn:aws:kms:us-west-2:111122223333:key/mrk-1234abcd12ab34cd56ef12345678990ab", 
        region: "us-west-2", 
      }, 
      replica_keys: [
      ], 
    }, 
    origin: "AWS_KMS", 
  }, # Detailed information about the KMS key that this operation creates.
}

Example: To create a KMS key for imported key material


# This example creates a KMS key with no key material. When the operation is complete, you can import your own key
# material into the KMS key. To create this KMS key, set the Origin parameter to EXTERNAL. 

resp = client.create_key({
  origin: "EXTERNAL", # The source of the key material for the KMS key.
})

resp.to_h outputs the following:
{
  key_metadata: {
    aws_account_id: "111122223333", 
    arn: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", 
    creation_date: Time.parse("2019-12-02T07:48:55-07:00"), 
    customer_master_key_spec: "SYMMETRIC_DEFAULT", 
    description: "", 
    enabled: false, 
    encryption_algorithms: [
      "SYMMETRIC_DEFAULT", 
    ], 
    key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", 
    key_manager: "CUSTOMER", 
    key_spec: "SYMMETRIC_DEFAULT", 
    key_state: "PendingImport", 
    key_usage: "ENCRYPT_DECRYPT", 
    multi_region: false, 
    origin: "EXTERNAL", 
  }, # Detailed information about the KMS key that this operation creates.
}

Example: To create a KMS key in a custom key store


# This example creates a KMS key in the specified custom key store. The operation creates the KMS key and its metadata in
# AWS KMS and the key material in the AWS CloudHSM cluster associated with the custom key store. This example requires the
# Origin and CustomKeyStoreId parameters.

resp = client.create_key({
  custom_key_store_id: "cks-1234567890abcdef0", # Identifies the custom key store that hosts the KMS key.
  origin: "AWS_CLOUDHSM", # Indicates the source of the key material for the KMS key.
})

resp.to_h outputs the following:
{
  key_metadata: {
    aws_account_id: "111122223333", 
    arn: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", 
    cloud_hsm_cluster_id: "cluster-1a23b4cdefg", 
    creation_date: Time.parse("2019-12-02T07:48:55-07:00"), 
    custom_key_store_id: "cks-1234567890abcdef0", 
    customer_master_key_spec: "SYMMETRIC_DEFAULT", 
    description: "", 
    enabled: true, 
    encryption_algorithms: [
      "SYMMETRIC_DEFAULT", 
    ], 
    key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", 
    key_manager: "CUSTOMER", 
    key_spec: "SYMMETRIC_DEFAULT", 
    key_state: "Enabled", 
    key_usage: "ENCRYPT_DECRYPT", 
    multi_region: false, 
    origin: "AWS_CLOUDHSM", 
  }, # Detailed information about the KMS key that this operation creates.
}

Request syntax with placeholder values


resp = client.create_key({
  policy: "PolicyType",
  description: "DescriptionType",
  key_usage: "SIGN_VERIFY", # accepts SIGN_VERIFY, ENCRYPT_DECRYPT
  customer_master_key_spec: "RSA_2048", # accepts RSA_2048, RSA_3072, RSA_4096, ECC_NIST_P256, ECC_NIST_P384, ECC_NIST_P521, ECC_SECG_P256K1, SYMMETRIC_DEFAULT
  key_spec: "RSA_2048", # accepts RSA_2048, RSA_3072, RSA_4096, ECC_NIST_P256, ECC_NIST_P384, ECC_NIST_P521, ECC_SECG_P256K1, SYMMETRIC_DEFAULT
  origin: "AWS_KMS", # accepts AWS_KMS, EXTERNAL, AWS_CLOUDHSM
  custom_key_store_id: "CustomKeyStoreIdType",
  bypass_policy_lockout_safety_check: false,
  tags: [
    {
      tag_key: "TagKeyType", # required
      tag_value: "TagValueType", # required
    },
  ],
  multi_region: false,
})

Response structure


resp.. #=> String
resp..key_id #=> String
resp..arn #=> String
resp..creation_date #=> Time
resp..enabled #=> Boolean
resp..description #=> String
resp..key_usage #=> String, one of "SIGN_VERIFY", "ENCRYPT_DECRYPT"
resp..key_state #=> String, one of "Creating", "Enabled", "Disabled", "PendingDeletion", "PendingImport", "PendingReplicaDeletion", "Unavailable", "Updating"
resp..deletion_date #=> Time
resp..valid_to #=> Time
resp..origin #=> String, one of "AWS_KMS", "EXTERNAL", "AWS_CLOUDHSM"
resp..custom_key_store_id #=> String
resp..cloud_hsm_cluster_id #=> String
resp..expiration_model #=> String, one of "KEY_MATERIAL_EXPIRES", "KEY_MATERIAL_DOES_NOT_EXPIRE"
resp..key_manager #=> String, one of "AWS", "CUSTOMER"
resp..customer_master_key_spec #=> String, one of "RSA_2048", "RSA_3072", "RSA_4096", "ECC_NIST_P256", "ECC_NIST_P384", "ECC_NIST_P521", "ECC_SECG_P256K1", "SYMMETRIC_DEFAULT"
resp..key_spec #=> String, one of "RSA_2048", "RSA_3072", "RSA_4096", "ECC_NIST_P256", "ECC_NIST_P384", "ECC_NIST_P521", "ECC_SECG_P256K1", "SYMMETRIC_DEFAULT"
resp..encryption_algorithms #=> Array
resp..encryption_algorithms[0] #=> String, one of "SYMMETRIC_DEFAULT", "RSAES_OAEP_SHA_1", "RSAES_OAEP_SHA_256"
resp..signing_algorithms #=> Array
resp..signing_algorithms[0] #=> String, one of "RSASSA_PSS_SHA_256", "RSASSA_PSS_SHA_384", "RSASSA_PSS_SHA_512", "RSASSA_PKCS1_V1_5_SHA_256", "RSASSA_PKCS1_V1_5_SHA_384", "RSASSA_PKCS1_V1_5_SHA_512", "ECDSA_SHA_256", "ECDSA_SHA_384", "ECDSA_SHA_512"
resp..multi_region #=> Boolean
resp..multi_region_configuration.multi_region_key_type #=> String, one of "PRIMARY", "REPLICA"
resp..multi_region_configuration.primary_key.arn #=> String
resp..multi_region_configuration.primary_key.region #=> String
resp..multi_region_configuration.replica_keys #=> Array
resp..multi_region_configuration.replica_keys[0].arn #=> String
resp..multi_region_configuration.replica_keys[0].region #=> String
resp..pending_deletion_window_in_days #=> Integer

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :policy (String)

    The key policy to attach to the KMS key.

    If you provide a key policy, it must meet the following criteria:

    • If you don't set BypassPolicyLockoutSafetyCheck to true, the key policy must allow the principal that is making the CreateKey request to make a subsequent PutKeyPolicy request on the KMS key. This reduces the risk that the KMS key becomes unmanageable. For more information, refer to the scenario in the Default Key Policy section of the Key Management Service Developer Guide .

    • Each statement in the key policy must contain one or more principals. The principals in the key policy must exist and be visible to KMS. When you create a new Amazon Web Services principal (for example, an IAM user or role), you might need to enforce a delay before including the new principal in a key policy because the new principal might not be immediately visible to KMS. For more information, see Changes that I make are not always immediately visible in the Amazon Web Services Identity and Access Management User Guide.

    If you do not provide a key policy, KMS attaches a default key policy to the KMS key. For more information, see Default Key Policy in the Key Management Service Developer Guide.

    The key policy size quota is 32 kilobytes (32768 bytes).

    For help writing and formatting a JSON policy document, see the IAM JSON Policy Reference in the Identity and Access Management User Guide .

  • :description (String)

    A description of the KMS key.

    Use a description that helps you decide whether the KMS key is appropriate for a task. The default value is an empty string (no description).

    To set or change the description after the key is created, use UpdateKeyDescription.

  • :key_usage (String)

    Determines the cryptographic operations for which you can use the KMS key. The default value is ENCRYPT_DECRYPT. This parameter is required only for asymmetric KMS keys. You can't change the KeyUsage value after the KMS key is created.

    Select only one valid value.

    • For symmetric KMS keys, omit the parameter or specify ENCRYPT_DECRYPT.

    • For asymmetric KMS keys with RSA key material, specify ENCRYPT_DECRYPT or SIGN_VERIFY.

    • For asymmetric KMS keys with ECC key material, specify SIGN_VERIFY.

  • :customer_master_key_spec (String)

    Instead, use the KeySpec parameter.

    The KeySpec and CustomerMasterKeySpec parameters work the same way. Only the names differ. We recommend that you use KeySpec parameter in your code. However, to avoid breaking changes, KMS will support both parameters.

  • :key_spec (String)

    Specifies the type of KMS key to create. The default value, SYMMETRIC_DEFAULT, creates a KMS key with a 256-bit symmetric key for encryption and decryption. For help choosing a key spec for your KMS key, see How to Choose Your KMS key Configuration in the Key Management Service Developer Guide .

    The KeySpec determines whether the KMS key contains a symmetric key or an asymmetric key pair. It also determines the encryption algorithms or signing algorithms that the KMS key supports. You can't change the KeySpec after the KMS key is created. To further restrict the algorithms that can be used with the KMS key, use a condition key in its key policy or IAM policy. For more information, see kms:EncryptionAlgorithm or kms:Signing Algorithm in the Key Management Service Developer Guide .

    Amazon Web Services services that are integrated with KMS use symmetric KMS keys to protect your data. These services do not support asymmetric KMS keys. For help determining whether a KMS key is symmetric or asymmetric, see Identifying Symmetric and Asymmetric KMS keys in the Key Management Service Developer Guide.

    KMS supports the following key specs for KMS keys:

    • Symmetric key (default)

      • SYMMETRIC_DEFAULT (AES-256-GCM)

      ^

    • Asymmetric RSA key pairs

      • RSA_2048

      • RSA_3072

      • RSA_4096

    • Asymmetric NIST-recommended elliptic curve key pairs

      • ECC_NIST_P256 (secp256r1)

      • ECC_NIST_P384 (secp384r1)

      • ECC_NIST_P521 (secp521r1)

    • Other asymmetric elliptic curve key pairs

      • ECC_SECG_P256K1 (secp256k1), commonly used for cryptocurrencies.

      ^

  • :origin (String)

    The source of the key material for the KMS key. You cannot change the origin after you create the KMS key. The default is AWS_KMS, which means that KMS creates the key material.

    To create a KMS key with no key material (for imported key material), set the value to EXTERNAL. For more information about importing key material into KMS, see Importing Key Material in the Key Management Service Developer Guide. This value is valid only for symmetric KMS keys.

    To create a KMS key in an KMS custom key store and create its key material in the associated CloudHSM cluster, set this value to AWS_CLOUDHSM. You must also use the CustomKeyStoreId parameter to identify the custom key store. This value is valid only for symmetric KMS keys.

  • :custom_key_store_id (String)

    Creates the KMS key in the specified custom key store and the key material in its associated CloudHSM cluster. To create a KMS key in a custom key store, you must also specify the Origin parameter with a value of AWS_CLOUDHSM. The CloudHSM cluster that is associated with the custom key store must have at least two active HSMs, each in a different Availability Zone in the Region.

    This parameter is valid only for symmetric KMS keys and regional KMS keys. You cannot create an asymmetric KMS key or a multi-Region key in a custom key store.

    To find the ID of a custom key store, use the DescribeCustomKeyStores operation.

    The response includes the custom key store ID and the ID of the CloudHSM cluster.

    This operation is part of the Custom Key Store feature feature in KMS, which combines the convenience and extensive integration of KMS with the isolation and control of a single-tenant key store.

  • :bypass_policy_lockout_safety_check (Boolean)

    A flag to indicate whether to bypass the key policy lockout safety check.

    Setting this value to true increases the risk that the KMS key becomes unmanageable. Do not set this value to true indiscriminately.

    For more information, refer to the scenario in the Default Key Policy section in the Key Management Service Developer Guide .

    Use this parameter only when you include a policy in the request and you intend to prevent the principal that is making the request from making a subsequent PutKeyPolicy request on the KMS key.

    The default value is false.

  • :tags (Array<Types::Tag>)

    Assigns one or more tags to the KMS key. Use this parameter to tag the KMS key when it is created. To tag an existing KMS key, use the TagResource operation.

    Tagging or untagging a KMS key can allow or deny permission to the KMS key. For details, see Using ABAC in KMS in the Key Management Service Developer Guide.

    To use this parameter, you must have kms:TagResource permission in an IAM policy.

    Each tag consists of a tag key and a tag value. Both the tag key and the tag value are required, but the tag value can be an empty (null) string. You cannot have more than one tag on a KMS key with the same tag key. If you specify an existing tag key with a different tag value, KMS replaces the current tag value with the specified one.

    When you add tags to an Amazon Web Services resource, Amazon Web Services generates a cost allocation report with usage and costs aggregated by tags. Tags can also be used to control access to a KMS key. For details, see Tagging Keys.

  • :multi_region (Boolean)

    Creates a multi-Region primary key that you can replicate into other Amazon Web Services Regions. You cannot change this value after you create the KMS key.

    For a multi-Region key, set this parameter to True. For a single-Region KMS key, omit this parameter or set it to False. The default value is False.

    This operation supports multi-Region keys, an KMS feature that lets you create multiple interoperable KMS keys in different Amazon Web Services Regions. Because these KMS keys have the same key ID, key material, and other metadata, you can use them interchangeably to encrypt data in one Amazon Web Services Region and decrypt it in a different Amazon Web Services Region without re-encrypting the data or making a cross-Region call. For more information about multi-Region keys, see Using multi-Region keys in the Key Management Service Developer Guide.

    This value creates a primary key, not a replica. To create a replica key, use the ReplicateKey operation.

    You can create a symmetric or asymmetric multi-Region key, and you can create a multi-Region key with imported key material. However, you cannot create a multi-Region key in a custom key store.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 1711

def create_key(params = {}, options = {})
  req = build_request(:create_key, params)
  req.send_request(options)
end

#decrypt(params = {}) ⇒ Types::DecryptResponse

Decrypts ciphertext that was encrypted by a KMS key using any of the following operations:

  • Encrypt

  • GenerateDataKey

  • GenerateDataKeyPair

  • GenerateDataKeyWithoutPlaintext

  • GenerateDataKeyPairWithoutPlaintext

You can use this operation to decrypt ciphertext that was encrypted under a symmetric or asymmetric KMS key. When the KMS key is asymmetric, you must specify the KMS key and the encryption algorithm that was used to encrypt the ciphertext. For information about symmetric and asymmetric KMS keys, see Using Symmetric and Asymmetric KMS keys in the Key Management Service Developer Guide.

The Decrypt operation also decrypts ciphertext that was encrypted outside of KMS by the public key in an KMS asymmetric KMS key. However, it cannot decrypt ciphertext produced by other libraries, such as the Amazon Web Services Encryption SDK or Amazon S3 client-side encryption. These libraries return a ciphertext format that is incompatible with KMS.

If the ciphertext was encrypted under a symmetric KMS key, the KeyId parameter is optional. KMS can get this information from metadata that it adds to the symmetric ciphertext blob. This feature adds durability to your implementation by ensuring that authorized users can decrypt ciphertext decades after it was encrypted, even if they've lost track of the key ID. However, specifying the KMS key is always recommended as a best practice. When you use the KeyId parameter to specify a KMS key, KMS only uses the KMS key you specify. If the ciphertext was encrypted under a different KMS key, the Decrypt operation fails. This practice ensures that you use the KMS key that you intend.

Whenever possible, use key policies to give users permission to call the Decrypt operation on a particular KMS key, instead of using IAM policies. Otherwise, you might create an IAM user policy that gives the user Decrypt permission on all KMS keys. This user could decrypt ciphertext that was encrypted by KMS keys in other accounts if the key policy for the cross-account KMS key permits it. If you must use an IAM policy for Decrypt permissions, limit the user to particular KMS keys or particular trusted accounts. For details, see Best practices for IAM policies in the Key Management Service Developer Guide.

Applications in Amazon Web Services Nitro Enclaves can call this operation by using the Amazon Web Services Nitro Enclaves Development Kit. For information about the supporting parameters, see How Amazon Web Services Nitro Enclaves use KMS in the Key Management Service Developer Guide.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.

Required permissions: kms:Decrypt (key policy)

Related operations:

  • Encrypt

  • GenerateDataKey

  • GenerateDataKeyPair

  • ReEncrypt

Examples:

Example: To decrypt data


# The following example decrypts data that was encrypted with a KMS key.

resp = client.decrypt({
  ciphertext_blob: "<binary data>", # The encrypted data (ciphertext).
  key_id: "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # A key identifier for the KMS key to use to decrypt the data.
})

resp.to_h outputs the following:
{
  key_id: "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The Amazon Resource Name (ARN) of the KMS key that was used to decrypt the data.
  plaintext: "<binary data>", # The decrypted (plaintext) data.
}

Request syntax with placeholder values


resp = client.decrypt({
  ciphertext_blob: "data", # required
  encryption_context: {
    "EncryptionContextKey" => "EncryptionContextValue",
  },
  grant_tokens: ["GrantTokenType"],
  key_id: "KeyIdType",
  encryption_algorithm: "SYMMETRIC_DEFAULT", # accepts SYMMETRIC_DEFAULT, RSAES_OAEP_SHA_1, RSAES_OAEP_SHA_256
})

Response structure


resp.key_id #=> String
resp.plaintext #=> String
resp.encryption_algorithm #=> String, one of "SYMMETRIC_DEFAULT", "RSAES_OAEP_SHA_1", "RSAES_OAEP_SHA_256"

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :ciphertext_blob (required, String, StringIO, File)

    Ciphertext to be decrypted. The blob includes metadata.

  • :encryption_context (Hash<String,String>)

    Specifies the encryption context to use when decrypting the data. An encryption context is valid only for cryptographic operations with a symmetric KMS key. The standard asymmetric encryption algorithms that KMS uses do not support an encryption context.

    An encryption context is a collection of non-secret key-value pairs that represents additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is optional when encrypting with a symmetric KMS key, but it is highly recommended.

    For more information, see Encryption Context in the Key Management Service Developer Guide.

  • :grant_tokens (Array<String>)

    A list of grant tokens.

    Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.

  • :key_id (String)

    Specifies the KMS key that KMS uses to decrypt the ciphertext. Enter a key ID of the KMS key that was used to encrypt the ciphertext.

    This parameter is required only when the ciphertext was encrypted under an asymmetric KMS key. If you used a symmetric KMS key, KMS can get the KMS key from metadata that it adds to the symmetric ciphertext blob. However, it is always recommended as a best practice. This practice ensures that you use the KMS key that you intend.

    To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    • Alias name: alias/ExampleAlias

    • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.

  • :encryption_algorithm (String)

    Specifies the encryption algorithm that will be used to decrypt the ciphertext. Specify the same algorithm that was used to encrypt the data. If you specify a different algorithm, the Decrypt operation fails.

    This parameter is required only when the ciphertext was encrypted under an asymmetric KMS key. The default value, SYMMETRIC_DEFAULT, represents the only supported algorithm that is valid for symmetric KMS keys.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 1922

def decrypt(params = {}, options = {})
  req = build_request(:decrypt, params)
  req.send_request(options)
end

#delete_alias(params = {}) ⇒ Struct

Deletes the specified alias.

Adding, deleting, or updating an alias can allow or deny permission to the KMS key. For details, see Using ABAC in KMS in the Key Management Service Developer Guide.

Because an alias is not a property of a KMS key, you can delete and change the aliases of a KMS key without affecting the KMS key. Also, aliases do not appear in the response from the DescribeKey operation. To get the aliases of all KMS keys, use the ListAliases operation.

Each KMS key can have multiple aliases. To change the alias of a KMS key, use DeleteAlias to delete the current alias and CreateAlias to create a new alias. To associate an existing alias with a different KMS key, call UpdateAlias.

Cross-account use: No. You cannot perform this operation on an alias in a different Amazon Web Services account.

Required permissions

For details, see Controlling access to aliases in the Key Management Service Developer Guide.

Related operations:

  • CreateAlias

  • ListAliases

  • UpdateAlias

Examples:

Example: To delete an alias


# The following example deletes the specified alias.

resp = client.delete_alias({
  alias_name: "alias/ExampleAlias", # The alias to delete.
})

Request syntax with placeholder values


resp = client.delete_alias({
  alias_name: "AliasNameType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :alias_name (required, String)

    The alias to be deleted. The alias name must begin with alias/ followed by the alias name, such as alias/ExampleAlias.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 1996

def delete_alias(params = {}, options = {})
  req = build_request(:delete_alias, params)
  req.send_request(options)
end

#delete_custom_key_store(params = {}) ⇒ Struct

Deletes a custom key store. This operation does not delete the CloudHSM cluster that is associated with the custom key store, or affect any users or keys in the cluster.

The custom key store that you delete cannot contain any KMS KMS keys. Before deleting the key store, verify that you will never need to use any of the KMS keys in the key store for any cryptographic operations. Then, use ScheduleKeyDeletion to delete the KMS keys from the key store. When the scheduled waiting period expires, the ScheduleKeyDeletion operation deletes the KMS keys. Then it makes a best effort to delete the key material from the associated cluster. However, you might need to manually delete the orphaned key material from the cluster and its backups.

After all KMS keys are deleted from KMS, use DisconnectCustomKeyStore to disconnect the key store from KMS. Then, you can delete the custom key store.

Instead of deleting the custom key store, consider using DisconnectCustomKeyStore to disconnect it from KMS. While the key store is disconnected, you cannot create or use the KMS keys in the key store. But, you do not need to delete KMS keys and you can reconnect a disconnected custom key store at any time.

If the operation succeeds, it returns a JSON object with no properties.

This operation is part of the Custom Key Store feature feature in KMS, which combines the convenience and extensive integration of KMS with the isolation and control of a single-tenant key store.

Cross-account use: No. You cannot perform this operation on a custom key store in a different Amazon Web Services account.

Required permissions: kms:DeleteCustomKeyStore (IAM policy)

Related operations:

  • ConnectCustomKeyStore

  • CreateCustomKeyStore

  • DescribeCustomKeyStores

  • DisconnectCustomKeyStore

  • UpdateCustomKeyStore

Examples:

Example: To delete a custom key store from AWS KMS


# This example deletes a custom key store from AWS KMS. This operation does not delete the AWS CloudHSM cluster that was
# associated with the CloudHSM cluster. This operation doesn't return any data. To verify that the operation was
# successful, use the DescribeCustomKeyStores operation.  

resp = client.delete_custom_key_store({
  custom_key_store_id: "cks-1234567890abcdef0", # The ID of the custom key store to be deleted.
})

resp.to_h outputs the following:
{
}

Request syntax with placeholder values


resp = client.delete_custom_key_store({
  custom_key_store_id: "CustomKeyStoreIdType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :custom_key_store_id (required, String)

    Enter the ID of the custom key store you want to delete. To find the ID of a custom key store, use the DescribeCustomKeyStores operation.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 2088

def delete_custom_key_store(params = {}, options = {})
  req = build_request(:delete_custom_key_store, params)
  req.send_request(options)
end

#delete_imported_key_material(params = {}) ⇒ Struct

Deletes key material that you previously imported. This operation makes the specified KMS key unusable. For more information about importing key material into KMS, see Importing Key Material in the Key Management Service Developer Guide.

When the specified KMS key is in the PendingDeletion state, this operation does not change the KMS key's state. Otherwise, it changes the KMS key's state to PendingImport.

After you delete key material, you can use ImportKeyMaterial to reimport the same key material into the KMS key.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:DeleteImportedKeyMaterial (key policy)

Related operations:

  • GetParametersForImport

  • ImportKeyMaterial

Examples:

Example: To delete imported key material


# The following example deletes the imported key material from the specified KMS key.

resp = client.delete_imported_key_material({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key whose imported key material you are deleting. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

Request syntax with placeholder values


resp = client.delete_imported_key_material({
  key_id: "KeyIdType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies the KMS key from which you are deleting imported key material. The Origin of the KMS key must be EXTERNAL.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 2164

def delete_imported_key_material(params = {}, options = {})
  req = build_request(:delete_imported_key_material, params)
  req.send_request(options)
end

#describe_custom_key_stores(params = {}) ⇒ Types::DescribeCustomKeyStoresResponse

Gets information about custom key stores in the account and Region.

This operation is part of the Custom Key Store feature feature in KMS, which combines the convenience and extensive integration of KMS with the isolation and control of a single-tenant key store.

By default, this operation returns information about all custom key stores in the account and Region. To get only information about a particular custom key store, use either the CustomKeyStoreName or CustomKeyStoreId parameter (but not both).

To determine whether the custom key store is connected to its CloudHSM cluster, use the ConnectionState element in the response. If an attempt to connect the custom key store failed, the ConnectionState value is FAILED and the ConnectionErrorCode element in the response indicates the cause of the failure. For help interpreting the ConnectionErrorCode, see CustomKeyStoresListEntry.

Custom key stores have a DISCONNECTED connection state if the key store has never been connected or you use the DisconnectCustomKeyStore operation to disconnect it. If your custom key store state is CONNECTED but you are having trouble using it, make sure that its associated CloudHSM cluster is active and contains the minimum number of HSMs required for the operation, if any.

For help repairing your custom key store, see the Troubleshooting Custom Key Stores topic in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a custom key store in a different Amazon Web Services account.

Required permissions: kms:DescribeCustomKeyStores (IAM policy)

Related operations:

  • ConnectCustomKeyStore

  • CreateCustomKeyStore

  • DeleteCustomKeyStore

  • DisconnectCustomKeyStore

  • UpdateCustomKeyStore

Examples:

Example: To get detailed information about custom key stores in the account and Region


# This example gets detailed information about all AWS KMS custom key stores in an AWS account and Region. To get all key
# stores, do not enter a custom key store name or ID.

resp = client.describe_custom_key_stores({
})

resp.to_h outputs the following:
{
  custom_key_stores: [
  ], # Details about each custom key store in the account and Region.
}

Example: To get detailed information about a custom key store associated with a CloudHSM cluster.


# This example gets detailed information about a particular AWS KMS custom key store that is associate with an AWS
# CloudHSM cluster. To limit the output to a particular custom key store, provide the custom key store name or ID. 

resp = client.describe_custom_key_stores({
  custom_key_store_name: "ExampleKeyStore", # The friendly name of the custom key store.
})

resp.to_h outputs the following:
{
  custom_key_stores: [
    {
      cloud_hsm_cluster_id: "cluster-1a23b4cdefg", 
      connection_state: "CONNECTED", 
      creation_date: Time.parse("1.499288695918E9"), 
      custom_key_store_id: "cks-1234567890abcdef0", 
      custom_key_store_name: "ExampleKeyStore", 
      trust_anchor_certificate: "<certificate appears here>", 
    }, 
  ], # Detailed information about the specified custom key store.
}

Request syntax with placeholder values


resp = client.describe_custom_key_stores({
  custom_key_store_id: "CustomKeyStoreIdType",
  custom_key_store_name: "CustomKeyStoreNameType",
  limit: 1,
  marker: "MarkerType",
})

Response structure


resp.custom_key_stores #=> Array
resp.custom_key_stores[0].custom_key_store_id #=> String
resp.custom_key_stores[0].custom_key_store_name #=> String
resp.custom_key_stores[0].cloud_hsm_cluster_id #=> String
resp.custom_key_stores[0].trust_anchor_certificate #=> String
resp.custom_key_stores[0].connection_state #=> String, one of "CONNECTED", "CONNECTING", "FAILED", "DISCONNECTED", "DISCONNECTING"
resp.custom_key_stores[0].connection_error_code #=> String, one of "INVALID_CREDENTIALS", "CLUSTER_NOT_FOUND", "NETWORK_ERRORS", "INTERNAL_ERROR", "INSUFFICIENT_CLOUDHSM_HSMS", "USER_LOCKED_OUT", "USER_NOT_FOUND", "USER_LOGGED_IN", "SUBNET_NOT_FOUND"
resp.custom_key_stores[0].creation_date #=> Time
resp.next_marker #=> String
resp.truncated #=> Boolean

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :custom_key_store_id (String)

    Gets only information about the specified custom key store. Enter the key store ID.

    By default, this operation gets information about all custom key stores in the account and Region. To limit the output to a particular custom key store, you can use either the CustomKeyStoreId or CustomKeyStoreName parameter, but not both.

  • :custom_key_store_name (String)

    Gets only information about the specified custom key store. Enter the friendly name of the custom key store.

    By default, this operation gets information about all custom key stores in the account and Region. To limit the output to a particular custom key store, you can use either the CustomKeyStoreId or CustomKeyStoreName parameter, but not both.

  • :limit (Integer)

    Use this parameter to specify the maximum number of items to return. When this value is present, KMS does not return more than the specified number of items, but it might return fewer.

  • :marker (String)

    Use this parameter in a subsequent request after you receive a response with truncated results. Set it to the value of NextMarker from the truncated response you just received.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 2321

def describe_custom_key_stores(params = {}, options = {})
  req = build_request(:describe_custom_key_stores, params)
  req.send_request(options)
end

#describe_key(params = {}) ⇒ Types::DescribeKeyResponse

Provides detailed information about a KMS key. You can run DescribeKey on a customer managed key or an Amazon Web Services managed key.

This detailed information includes the key ARN, creation date (and deletion date, if applicable), the key state, and the origin and expiration date (if any) of the key material. It includes fields, like KeySpec, that help you distinguish symmetric from asymmetric KMS keys. It also provides information that is particularly important to asymmetric keys, such as the key usage (encryption or signing) and the encryption algorithms or signing algorithms that the KMS key supports. For KMS keys in custom key stores, it includes information about the custom key store, such as the key store ID and the CloudHSM cluster ID. For multi-Region keys, it displays the primary key and all related replica keys.

DescribeKey does not return the following information:

  • Aliases associated with the KMS key. To get this information, use ListAliases.

  • Whether automatic key rotation is enabled on the KMS key. To get this information, use GetKeyRotationStatus. Also, some key states prevent a KMS key from being automatically rotated. For details, see How Automatic Key Rotation Works in Key Management Service Developer Guide.

  • Tags on the KMS key. To get this information, use ListResourceTags.

  • Key policies and grants on the KMS key. To get this information, use GetKeyPolicy and ListGrants.

If you call the DescribeKey operation on a predefined Amazon Web Services alias, that is, an Amazon Web Services alias with no key ID, KMS creates an Amazon Web Services managed key. Then, it associates the alias with the new KMS key, and returns the KeyId and Arn of the new KMS key in the response.

Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.

Required permissions: kms:DescribeKey (key policy)

Related operations:

  • GetKeyPolicy

  • GetKeyRotationStatus

  • ListAliases

  • ListGrants

  • ListKeys

  • ListResourceTags

  • ListRetirableGrants

Examples:

Example: To get details about a KMS key


# The following example gets metadata about a symmetric KMS key.

resp = client.describe_key({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key that you want information about. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

resp.to_h outputs the following:
{
  key_metadata: {
    aws_account_id: "111122223333", 
    arn: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", 
    creation_date: Time.parse("2017-07-05T14:04:55-07:00"), 
    customer_master_key_spec: "SYMMETRIC_DEFAULT", 
    description: "", 
    enabled: true, 
    encryption_algorithms: [
      "SYMMETRIC_DEFAULT", 
    ], 
    key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", 
    key_manager: "CUSTOMER", 
    key_spec: "SYMMETRIC_DEFAULT", 
    key_state: "Enabled", 
    key_usage: "ENCRYPT_DECRYPT", 
    multi_region: false, 
    origin: "AWS_KMS", 
  }, # An object that contains information about the specified KMS key.
}

Request syntax with placeholder values


resp = client.describe_key({
  key_id: "KeyIdType", # required
  grant_tokens: ["GrantTokenType"],
})

Response structure


resp.. #=> String
resp..key_id #=> String
resp..arn #=> String
resp..creation_date #=> Time
resp..enabled #=> Boolean
resp..description #=> String
resp..key_usage #=> String, one of "SIGN_VERIFY", "ENCRYPT_DECRYPT"
resp..key_state #=> String, one of "Creating", "Enabled", "Disabled", "PendingDeletion", "PendingImport", "PendingReplicaDeletion", "Unavailable", "Updating"
resp..deletion_date #=> Time
resp..valid_to #=> Time
resp..origin #=> String, one of "AWS_KMS", "EXTERNAL", "AWS_CLOUDHSM"
resp..custom_key_store_id #=> String
resp..cloud_hsm_cluster_id #=> String
resp..expiration_model #=> String, one of "KEY_MATERIAL_EXPIRES", "KEY_MATERIAL_DOES_NOT_EXPIRE"
resp..key_manager #=> String, one of "AWS", "CUSTOMER"
resp..customer_master_key_spec #=> String, one of "RSA_2048", "RSA_3072", "RSA_4096", "ECC_NIST_P256", "ECC_NIST_P384", "ECC_NIST_P521", "ECC_SECG_P256K1", "SYMMETRIC_DEFAULT"
resp..key_spec #=> String, one of "RSA_2048", "RSA_3072", "RSA_4096", "ECC_NIST_P256", "ECC_NIST_P384", "ECC_NIST_P521", "ECC_SECG_P256K1", "SYMMETRIC_DEFAULT"
resp..encryption_algorithms #=> Array
resp..encryption_algorithms[0] #=> String, one of "SYMMETRIC_DEFAULT", "RSAES_OAEP_SHA_1", "RSAES_OAEP_SHA_256"
resp..signing_algorithms #=> Array
resp..signing_algorithms[0] #=> String, one of "RSASSA_PSS_SHA_256", "RSASSA_PSS_SHA_384", "RSASSA_PSS_SHA_512", "RSASSA_PKCS1_V1_5_SHA_256", "RSASSA_PKCS1_V1_5_SHA_384", "RSASSA_PKCS1_V1_5_SHA_512", "ECDSA_SHA_256", "ECDSA_SHA_384", "ECDSA_SHA_512"
resp..multi_region #=> Boolean
resp..multi_region_configuration.multi_region_key_type #=> String, one of "PRIMARY", "REPLICA"
resp..multi_region_configuration.primary_key.arn #=> String
resp..multi_region_configuration.primary_key.region #=> String
resp..multi_region_configuration.replica_keys #=> Array
resp..multi_region_configuration.replica_keys[0].arn #=> String
resp..multi_region_configuration.replica_keys[0].region #=> String
resp..pending_deletion_window_in_days #=> Integer

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Describes the specified KMS key.

    If you specify a predefined Amazon Web Services alias (an Amazon Web Services alias with no key ID), KMS associates the alias with an Amazon Web Services managed key and returns its KeyId and Arn in the response.

    To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    • Alias name: alias/ExampleAlias

    • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.

  • :grant_tokens (Array<String>)

    A list of grant tokens.

    Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 2515

def describe_key(params = {}, options = {})
  req = build_request(:describe_key, params)
  req.send_request(options)
end

#disable_key(params = {}) ⇒ Struct

Sets the state of a KMS key to disabled. This change temporarily prevents use of the KMS key for cryptographic operations.

For more information about how key state affects the use of a KMS key, see Key state: Effect on your KMS key in the Key Management Service Developer Guide .

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:DisableKey (key policy)

Related operations: EnableKey

Examples:

Example: To disable a KMS key


# The following example disables the specified KMS key.

resp = client.disable_key({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key to disable. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

Request syntax with placeholder values


resp = client.disable_key({
  key_id: "KeyIdType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies the KMS key to disable.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 2580

def disable_key(params = {}, options = {})
  req = build_request(:disable_key, params)
  req.send_request(options)
end

#disable_key_rotation(params = {}) ⇒ Struct

Disables automatic rotation of the key material for the specified symmetric KMS key.

You cannot enable automatic rotation of asymmetric KMS keys, KMS keys with imported key material, or KMS keys in a custom key store. To enable or disable automatic rotation of a set of related multi-Region keys, set the property on the primary key.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:DisableKeyRotation (key policy)

Related operations:

  • EnableKeyRotation

  • GetKeyRotationStatus

Examples:

Example: To disable automatic rotation of key material


# The following example disables automatic annual rotation of the key material for the specified KMS key.

resp = client.disable_key_rotation({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key whose key material will no longer be rotated. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

Request syntax with placeholder values


resp = client.disable_key_rotation({
  key_id: "KeyIdType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies a symmetric KMS key. You cannot enable or disable automatic rotation of asymmetric KMS keys, KMS keys with imported key material, or KMS keys in a custom key store.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 2662

def disable_key_rotation(params = {}, options = {})
  req = build_request(:disable_key_rotation, params)
  req.send_request(options)
end

#disconnect_custom_key_store(params = {}) ⇒ Struct

Disconnects the custom key store from its associated CloudHSM cluster. While a custom key store is disconnected, you can manage the custom key store and its KMS keys, but you cannot create or use KMS keys in the custom key store. You can reconnect the custom key store at any time.

While a custom key store is disconnected, all attempts to create KMS keys in the custom key store or to use existing KMS keys in cryptographic operations will fail. This action can prevent users from storing and accessing sensitive data.

To find the connection state of a custom key store, use the DescribeCustomKeyStores operation. To reconnect a custom key store, use the ConnectCustomKeyStore operation.

If the operation succeeds, it returns a JSON object with no properties.

This operation is part of the Custom Key Store feature feature in KMS, which combines the convenience and extensive integration of KMS with the isolation and control of a single-tenant key store.

Cross-account use: No. You cannot perform this operation on a custom key store in a different Amazon Web Services account.

Required permissions: kms:DisconnectCustomKeyStore (IAM policy)

Related operations:

  • ConnectCustomKeyStore

  • CreateCustomKeyStore

  • DeleteCustomKeyStore

  • DescribeCustomKeyStores

  • UpdateCustomKeyStore

Examples:

Example: To disconnect a custom key store from its CloudHSM cluster


# This example disconnects an AWS KMS custom key store from its AWS CloudHSM cluster. This operation doesn't return any
# data. To verify that the custom key store is disconnected, use the <code>DescribeCustomKeyStores</code> operation.

resp = client.disconnect_custom_key_store({
  custom_key_store_id: "cks-1234567890abcdef0", # The ID of the custom key store.
})

resp.to_h outputs the following:
{
}

Request syntax with placeholder values


resp = client.disconnect_custom_key_store({
  custom_key_store_id: "CustomKeyStoreIdType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :custom_key_store_id (required, String)

    Enter the ID of the custom key store you want to disconnect. To find the ID of a custom key store, use the DescribeCustomKeyStores operation.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 2748

def disconnect_custom_key_store(params = {}, options = {})
  req = build_request(:disconnect_custom_key_store, params)
  req.send_request(options)
end

#enable_key(params = {}) ⇒ Struct

Sets the key state of a KMS key to enabled. This allows you to use the KMS key for cryptographic operations.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:EnableKey (key policy)

Related operations: DisableKey

Examples:

Example: To enable a KMS key


# The following example enables the specified KMS key.

resp = client.enable_key({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key to enable. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

Request syntax with placeholder values


resp = client.enable_key({
  key_id: "KeyIdType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies the KMS key to enable.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 2809

def enable_key(params = {}, options = {})
  req = build_request(:enable_key, params)
  req.send_request(options)
end

#enable_key_rotation(params = {}) ⇒ Struct

Enables automatic rotation of the key material for the specified symmetric KMS key.

You cannot enable automatic rotation of asymmetric KMS keys, KMS keys with imported key material, or KMS keys in a custom key store. To enable or disable automatic rotation of a set of related multi-Region keys, set the property on the primary key.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:EnableKeyRotation (key policy)

Related operations:

  • DisableKeyRotation

  • GetKeyRotationStatus

Examples:

Example: To enable automatic rotation of key material


# The following example enables automatic annual rotation of the key material for the specified KMS key.

resp = client.enable_key_rotation({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key whose key material will be rotated annually. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

Request syntax with placeholder values


resp = client.enable_key_rotation({
  key_id: "KeyIdType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies a symmetric KMS key. You cannot enable automatic rotation of asymmetric KMS keys, KMS keys with imported key material, or KMS keys in a custom key store. To enable or disable automatic rotation of a set of related multi-Region keys, set the property on the primary key.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 2894

def enable_key_rotation(params = {}, options = {})
  req = build_request(:enable_key_rotation, params)
  req.send_request(options)
end

#encrypt(params = {}) ⇒ Types::EncryptResponse

Encrypts plaintext into ciphertext by using a KMS key. The Encrypt operation has two primary use cases:

  • You can encrypt small amounts of arbitrary data, such as a personal identifier or database password, or other sensitive information.

  • You can use the Encrypt operation to move encrypted data from one Amazon Web Services Region to another. For example, in Region A, generate a data key and use the plaintext key to encrypt your data. Then, in Region A, use the Encrypt operation to encrypt the plaintext data key under a KMS key in Region B. Now, you can move the encrypted data and the encrypted data key to Region B. When necessary, you can decrypt the encrypted data key and the encrypted data entirely within in Region B.

You don't need to use the Encrypt operation to encrypt a data key. The GenerateDataKey and GenerateDataKeyPair operations return a plaintext data key and an encrypted copy of that data key.

When you encrypt data, you must specify a symmetric or asymmetric KMS key to use in the encryption operation. The KMS key must have a KeyUsage value of ENCRYPT_DECRYPT. To find the KeyUsage of a KMS key, use the DescribeKey operation.

If you use a symmetric KMS key, you can use an encryption context to add additional security to your encryption operation. If you specify an EncryptionContext when encrypting data, you must specify the same encryption context (a case-sensitive exact match) when decrypting the data. Otherwise, the request to decrypt fails with an InvalidCiphertextException. For more information, see Encryption Context in the Key Management Service Developer Guide.

If you specify an asymmetric KMS key, you must also specify the encryption algorithm. The algorithm must be compatible with the KMS key type.

When you use an asymmetric KMS key to encrypt or reencrypt data, be sure to record the KMS key and encryption algorithm that you choose. You will be required to provide the same KMS key and encryption algorithm when you decrypt the data. If the KMS key and algorithm do not match the values used to encrypt the data, the decrypt operation fails.

You are not required to supply the key ID and encryption algorithm when you decrypt with symmetric KMS keys because KMS stores this information in the ciphertext blob. KMS cannot store metadata in ciphertext generated with asymmetric keys. The standard format for asymmetric key ciphertext does not include configurable fields.

The maximum size of the data that you can encrypt varies with the type of KMS key and the encryption algorithm that you choose.

  • Symmetric KMS keys

    • SYMMETRIC_DEFAULT: 4096 bytes

    ^

  • RSA_2048

    • RSAES_OAEP_SHA_1: 214 bytes

    • RSAES_OAEP_SHA_256: 190 bytes

  • RSA_3072

    • RSAES_OAEP_SHA_1: 342 bytes

    • RSAES_OAEP_SHA_256: 318 bytes

  • RSA_4096

    • RSAES_OAEP_SHA_1: 470 bytes

    • RSAES_OAEP_SHA_256: 446 bytes

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.

Required permissions: kms:Encrypt (key policy)

Related operations:

  • Decrypt

  • GenerateDataKey

  • GenerateDataKeyPair

Examples:

Example: To encrypt data


# The following example encrypts data with the specified KMS key.

resp = client.encrypt({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key to use for encryption. You can use the key ID or Amazon Resource Name (ARN) of the KMS key, or the name or ARN of an alias that refers to the KMS key.
  plaintext: "<binary data>", # The data to encrypt.
})

resp.to_h outputs the following:
{
  ciphertext_blob: "<binary data>", # The encrypted data (ciphertext).
  key_id: "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The ARN of the KMS key that was used to encrypt the data.
}

Request syntax with placeholder values


resp = client.encrypt({
  key_id: "KeyIdType", # required
  plaintext: "data", # required
  encryption_context: {
    "EncryptionContextKey" => "EncryptionContextValue",
  },
  grant_tokens: ["GrantTokenType"],
  encryption_algorithm: "SYMMETRIC_DEFAULT", # accepts SYMMETRIC_DEFAULT, RSAES_OAEP_SHA_1, RSAES_OAEP_SHA_256
})

Response structure


resp.ciphertext_blob #=> String
resp.key_id #=> String
resp.encryption_algorithm #=> String, one of "SYMMETRIC_DEFAULT", "RSAES_OAEP_SHA_1", "RSAES_OAEP_SHA_256"

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies the KMS key to use in the encryption operation.

    To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    • Alias name: alias/ExampleAlias

    • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.

  • :plaintext (required, String, StringIO, File)

    Data to be encrypted.

  • :encryption_context (Hash<String,String>)

    Specifies the encryption context that will be used to encrypt the data. An encryption context is valid only for cryptographic operations with a symmetric KMS key. The standard asymmetric encryption algorithms that KMS uses do not support an encryption context.

    An encryption context is a collection of non-secret key-value pairs that represents additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is optional when encrypting with a symmetric KMS key, but it is highly recommended.

    For more information, see Encryption Context in the Key Management Service Developer Guide.

  • :grant_tokens (Array<String>)

    A list of grant tokens.

    Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.

  • :encryption_algorithm (String)

    Specifies the encryption algorithm that KMS will use to encrypt the plaintext message. The algorithm must be compatible with the KMS key that you specify.

    This parameter is required only for asymmetric KMS keys. The default value, SYMMETRIC_DEFAULT, is the algorithm used for symmetric KMS keys. If you are using an asymmetric KMS key, we recommend RSAES_OAEP_SHA_256.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 3113

def encrypt(params = {}, options = {})
  req = build_request(:encrypt, params)
  req.send_request(options)
end

#generate_data_key(params = {}) ⇒ Types::GenerateDataKeyResponse

Generates a unique symmetric data key for client-side encryption. This operation returns a plaintext copy of the data key and a copy that is encrypted under a KMS key that you specify. You can use the plaintext key to encrypt your data outside of KMS and store the encrypted data key with the encrypted data.

GenerateDataKey returns a unique data key for each request. The bytes in the plaintext key are not related to the caller or the KMS key.

To generate a data key, specify the symmetric KMS key that will be used to encrypt the data key. You cannot use an asymmetric KMS key to generate data keys. To get the type of your KMS key, use the DescribeKey operation. You must also specify the length of the data key. Use either the KeySpec or NumberOfBytes parameters (but not both). For 128-bit and 256-bit data keys, use the KeySpec parameter.

To get only an encrypted copy of the data key, use GenerateDataKeyWithoutPlaintext. To generate an asymmetric data key pair, use the GenerateDataKeyPair or GenerateDataKeyPairWithoutPlaintext operation. To get a cryptographically secure random byte string, use GenerateRandom.

You can use the optional encryption context to add additional security to the encryption operation. If you specify an EncryptionContext, you must specify the same encryption context (a case-sensitive exact match) when decrypting the encrypted data key. Otherwise, the request to decrypt fails with an InvalidCiphertextException. For more information, see Encryption Context in the Key Management Service Developer Guide.

Applications in Amazon Web Services Nitro Enclaves can call this operation by using the Amazon Web Services Nitro Enclaves Development Kit. For information about the supporting parameters, see How Amazon Web Services Nitro Enclaves use KMS in the Key Management Service Developer Guide.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

How to use your data key

We recommend that you use the following pattern to encrypt data locally in your application. You can write your own code or use a client-side encryption library, such as the Amazon Web Services Encryption SDK, the Amazon DynamoDB Encryption Client, or Amazon S3 client-side encryption to do these tasks for you.

To encrypt data outside of KMS:

  1. Use the GenerateDataKey operation to get a data key.

  2. Use the plaintext data key (in the Plaintext field of the response) to encrypt your data outside of KMS. Then erase the plaintext data key from memory.

  3. Store the encrypted data key (in the CiphertextBlob field of the response) with the encrypted data.

To decrypt data outside of KMS:

  1. Use the Decrypt operation to decrypt the encrypted data key. The operation returns a plaintext copy of the data key.

  2. Use the plaintext data key to decrypt data outside of KMS, then erase the plaintext data key from memory.

Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.

Required permissions: kms:GenerateDataKey (key policy)

Related operations:

  • Decrypt

  • Encrypt

  • GenerateDataKeyPair

  • GenerateDataKeyPairWithoutPlaintext

  • GenerateDataKeyWithoutPlaintext

Examples:

Example: To generate a data key


# The following example generates a 256-bit symmetric data encryption key (data key) in two formats. One is the
# unencrypted (plainext) data key, and the other is the data key encrypted with the specified KMS key.

resp = client.generate_data_key({
  key_id: "alias/ExampleAlias", # The identifier of the KMS key to use to encrypt the data key. You can use the key ID or Amazon Resource Name (ARN) of the KMS key, or the name or ARN of an alias that refers to the KMS key.
  key_spec: "AES_256", # Specifies the type of data key to return.
})

resp.to_h outputs the following:
{
  ciphertext_blob: "<binary data>", # The encrypted data key.
  key_id: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The ARN of the KMS key that was used to encrypt the data key.
  plaintext: "<binary data>", # The unencrypted (plaintext) data key.
}

Request syntax with placeholder values


resp = client.generate_data_key({
  key_id: "KeyIdType", # required
  encryption_context: {
    "EncryptionContextKey" => "EncryptionContextValue",
  },
  number_of_bytes: 1,
  key_spec: "AES_256", # accepts AES_256, AES_128
  grant_tokens: ["GrantTokenType"],
})

Response structure


resp.ciphertext_blob #=> String
resp.plaintext #=> String
resp.key_id #=> String

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies the symmetric KMS key that encrypts the data key.

    To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    • Alias name: alias/ExampleAlias

    • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.

  • :encryption_context (Hash<String,String>)

    Specifies the encryption context that will be used when encrypting the data key.

    An encryption context is a collection of non-secret key-value pairs that represents additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is optional when encrypting with a symmetric KMS key, but it is highly recommended.

    For more information, see Encryption Context in the Key Management Service Developer Guide.

  • :number_of_bytes (Integer)

    Specifies the length of the data key in bytes. For example, use the value 64 to generate a 512-bit data key (64 bytes is 512 bits). For 128-bit (16-byte) and 256-bit (32-byte) data keys, use the KeySpec parameter.

    You must specify either the KeySpec or the NumberOfBytes parameter (but not both) in every GenerateDataKey request.

  • :key_spec (String)

    Specifies the length of the data key. Use AES_128 to generate a 128-bit symmetric key, or AES_256 to generate a 256-bit symmetric key.

    You must specify either the KeySpec or the NumberOfBytes parameter (but not both) in every GenerateDataKey request.

  • :grant_tokens (Array<String>)

    A list of grant tokens.

    Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 3331

def generate_data_key(params = {}, options = {})
  req = build_request(:generate_data_key, params)
  req.send_request(options)
end

#generate_data_key_pair(params = {}) ⇒ Types::GenerateDataKeyPairResponse

Generates a unique asymmetric data key pair. The GenerateDataKeyPair operation returns a plaintext public key, a plaintext private key, and a copy of the private key that is encrypted under the symmetric KMS key you specify. You can use the data key pair to perform asymmetric cryptography and implement digital signatures outside of KMS.

You can use the public key that GenerateDataKeyPair returns to encrypt data or verify a signature outside of KMS. Then, store the encrypted private key with the data. When you are ready to decrypt data or sign a message, you can use the Decrypt operation to decrypt the encrypted private key.

To generate a data key pair, you must specify a symmetric KMS key to encrypt the private key in a data key pair. You cannot use an asymmetric KMS key or a KMS key in a custom key store. To get the type and origin of your KMS key, use the DescribeKey operation.

Use the KeyPairSpec parameter to choose an RSA or Elliptic Curve (ECC) data key pair. KMS recommends that your use ECC key pairs for signing, and use RSA key pairs for either encryption or signing, but not both. However, KMS cannot enforce any restrictions on the use of data key pairs outside of KMS.

If you are using the data key pair to encrypt data, or for any operation where you don't immediately need a private key, consider using the GenerateDataKeyPairWithoutPlaintext operation. GenerateDataKeyPairWithoutPlaintext returns a plaintext public key and an encrypted private key, but omits the plaintext private key that you need only to decrypt ciphertext or sign a message. Later, when you need to decrypt the data or sign a message, use the Decrypt operation to decrypt the encrypted private key in the data key pair.

GenerateDataKeyPair returns a unique data key pair for each request. The bytes in the keys are not related to the caller or the KMS key that is used to encrypt the private key. The public key is a DER-encoded X.509 SubjectPublicKeyInfo, as specified in RFC 5280. The private key is a DER-encoded PKCS8 PrivateKeyInfo, as specified in RFC 5958.

You can use the optional encryption context to add additional security to the encryption operation. If you specify an EncryptionContext, you must specify the same encryption context (a case-sensitive exact match) when decrypting the encrypted data key. Otherwise, the request to decrypt fails with an InvalidCiphertextException. For more information, see Encryption Context in the Key Management Service Developer Guide.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.

Required permissions: kms:GenerateDataKeyPair (key policy)

Related operations:

  • Decrypt

  • Encrypt

  • GenerateDataKey

  • GenerateDataKeyPairWithoutPlaintext

  • GenerateDataKeyWithoutPlaintext

Examples:

Example: To generate an RSA key pair for encryption and decryption


# This example generates an RSA data key pair for encryption and decryption. The operation returns a plaintext public key
# and private key, and a copy of the private key that is encrypted under a symmetric KMS key that you specify.

resp = client.generate_data_key_pair({
  key_id: "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The key ID of the symmetric KMS key that encrypts the private RSA key in the data key pair.
  key_pair_spec: "RSA_3072", # The requested key spec of the RSA data key pair.
})

resp.to_h outputs the following:
{
  key_id: "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The key ARN of the symmetric KMS key that was used to encrypt the private key.
  key_pair_spec: "RSA_3072", # The actual key spec of the RSA data key pair.
  private_key_ciphertext_blob: "<binary data>", # The encrypted private key of the RSA data key pair.
  private_key_plaintext: "<binary data>", # The plaintext private key of the RSA data key pair.
  public_key: "<binary data>", # The public key (plaintext) of the RSA data key pair.
}

Request syntax with placeholder values


resp = client.generate_data_key_pair({
  encryption_context: {
    "EncryptionContextKey" => "EncryptionContextValue",
  },
  key_id: "KeyIdType", # required
  key_pair_spec: "RSA_2048", # required, accepts RSA_2048, RSA_3072, RSA_4096, ECC_NIST_P256, ECC_NIST_P384, ECC_NIST_P521, ECC_SECG_P256K1
  grant_tokens: ["GrantTokenType"],
})

Response structure


resp.private_key_ciphertext_blob #=> String
resp.private_key_plaintext #=> String
resp.public_key #=> String
resp.key_id #=> String
resp.key_pair_spec #=> String, one of "RSA_2048", "RSA_3072", "RSA_4096", "ECC_NIST_P256", "ECC_NIST_P384", "ECC_NIST_P521", "ECC_SECG_P256K1"

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :encryption_context (Hash<String,String>)

    Specifies the encryption context that will be used when encrypting the private key in the data key pair.

    An encryption context is a collection of non-secret key-value pairs that represents additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is optional when encrypting with a symmetric KMS key, but it is highly recommended.

    For more information, see Encryption Context in the Key Management Service Developer Guide.

  • :key_id (required, String)

    Specifies the symmetric KMS key that encrypts the private key in the data key pair. You cannot specify an asymmetric KMS key or a KMS key in a custom key store. To get the type and origin of your KMS key, use the DescribeKey operation.

    To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    • Alias name: alias/ExampleAlias

    • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.

  • :key_pair_spec (required, String)

    Determines the type of data key pair that is generated.

    The KMS rule that restricts the use of asymmetric RSA KMS keys to encrypt and decrypt or to sign and verify (but not both), and the rule that permits you to use ECC KMS keys only to sign and verify, are not effective on data key pairs, which are used outside of KMS.

  • :grant_tokens (Array<String>)

    A list of grant tokens.

    Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 3528

def generate_data_key_pair(params = {}, options = {})
  req = build_request(:generate_data_key_pair, params)
  req.send_request(options)
end

#generate_data_key_pair_without_plaintext(params = {}) ⇒ Types::GenerateDataKeyPairWithoutPlaintextResponse

Generates a unique asymmetric data key pair. The GenerateDataKeyPairWithoutPlaintext operation returns a plaintext public key and a copy of the private key that is encrypted under the symmetric KMS key you specify. Unlike GenerateDataKeyPair, this operation does not return a plaintext private key.

You can use the public key that GenerateDataKeyPairWithoutPlaintext returns to encrypt data or verify a signature outside of KMS. Then, store the encrypted private key with the data. When you are ready to decrypt data or sign a message, you can use the Decrypt operation to decrypt the encrypted private key.

To generate a data key pair, you must specify a symmetric KMS key to encrypt the private key in a data key pair. You cannot use an asymmetric KMS key or a KMS key in a custom key store. To get the type and origin of your KMS key, use the DescribeKey operation.

Use the KeyPairSpec parameter to choose an RSA or Elliptic Curve (ECC) data key pair. KMS recommends that your use ECC key pairs for signing, and use RSA key pairs for either encryption or signing, but not both. However, KMS cannot enforce any restrictions on the use of data key pairs outside of KMS.

GenerateDataKeyPairWithoutPlaintext returns a unique data key pair for each request. The bytes in the key are not related to the caller or KMS key that is used to encrypt the private key. The public key is a DER-encoded X.509 SubjectPublicKeyInfo, as specified in RFC 5280.

You can use the optional encryption context to add additional security to the encryption operation. If you specify an EncryptionContext, you must specify the same encryption context (a case-sensitive exact match) when decrypting the encrypted data key. Otherwise, the request to decrypt fails with an InvalidCiphertextException. For more information, see Encryption Context in the Key Management Service Developer Guide.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.

Required permissions: kms:GenerateDataKeyPairWithoutPlaintext (key policy)

Related operations:

  • Decrypt

  • Encrypt

  • GenerateDataKey

  • GenerateDataKeyPair

  • GenerateDataKeyWithoutPlaintext

Examples:

Example: To generate an asymmetric data key pair without a plaintext key


# This example returns an asymmetric elliptic curve (ECC) data key pair. The private key is encrypted under the symmetric
# KMS key that you specify. This operation doesn't return a plaintext (unencrypted) private key.

resp = client.generate_data_key_pair_without_plaintext({
  key_id: "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The symmetric KMS key that encrypts the private key of the ECC data key pair.
  key_pair_spec: "ECC_NIST_P521", # The requested key spec of the ECC asymmetric data key pair.
})

resp.to_h outputs the following:
{
  key_id: "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The key ARN of the symmetric KMS key that encrypted the private key in the ECC asymmetric data key pair.
  key_pair_spec: "ECC_NIST_P521", # The actual key spec of the ECC asymmetric data key pair.
  private_key_ciphertext_blob: "<binary data>", # The encrypted private key of the asymmetric ECC data key pair.
  public_key: "<binary data>", # The public key (plaintext).
}

Request syntax with placeholder values


resp = client.generate_data_key_pair_without_plaintext({
  encryption_context: {
    "EncryptionContextKey" => "EncryptionContextValue",
  },
  key_id: "KeyIdType", # required
  key_pair_spec: "RSA_2048", # required, accepts RSA_2048, RSA_3072, RSA_4096, ECC_NIST_P256, ECC_NIST_P384, ECC_NIST_P521, ECC_SECG_P256K1
  grant_tokens: ["GrantTokenType"],
})

Response structure


resp.private_key_ciphertext_blob #=> String
resp.public_key #=> String
resp.key_id #=> String
resp.key_pair_spec #=> String, one of "RSA_2048", "RSA_3072", "RSA_4096", "ECC_NIST_P256", "ECC_NIST_P384", "ECC_NIST_P521", "ECC_SECG_P256K1"

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :encryption_context (Hash<String,String>)

    Specifies the encryption context that will be used when encrypting the private key in the data key pair.

    An encryption context is a collection of non-secret key-value pairs that represents additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is optional when encrypting with a symmetric KMS key, but it is highly recommended.

    For more information, see Encryption Context in the Key Management Service Developer Guide.

  • :key_id (required, String)

    Specifies the KMS key that encrypts the private key in the data key pair. You must specify a symmetric KMS key. You cannot use an asymmetric KMS key or a KMS key in a custom key store. To get the type and origin of your KMS key, use the DescribeKey operation.

    To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    • Alias name: alias/ExampleAlias

    • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.

  • :key_pair_spec (required, String)

    Determines the type of data key pair that is generated.

    The KMS rule that restricts the use of asymmetric RSA KMS keys to encrypt and decrypt or to sign and verify (but not both), and the rule that permits you to use ECC KMS keys only to sign and verify, are not effective on data key pairs, which are used outside of KMS.

  • :grant_tokens (Array<String>)

    A list of grant tokens.

    Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 3712

def generate_data_key_pair_without_plaintext(params = {}, options = {})
  req = build_request(:generate_data_key_pair_without_plaintext, params)
  req.send_request(options)
end

#generate_data_key_without_plaintext(params = {}) ⇒ Types::GenerateDataKeyWithoutPlaintextResponse

Generates a unique symmetric data key. This operation returns a data key that is encrypted under a KMS key that you specify. To request an asymmetric data key pair, use the GenerateDataKeyPair or GenerateDataKeyPairWithoutPlaintext operations.

GenerateDataKeyWithoutPlaintext is identical to the GenerateDataKey operation except that returns only the encrypted copy of the data key. This operation is useful for systems that need to encrypt data at some point, but not immediately. When you need to encrypt the data, you call the Decrypt operation on the encrypted copy of the key.

It's also useful in distributed systems with different levels of trust. For example, you might store encrypted data in containers. One component of your system creates new containers and stores an encrypted data key with each container. Then, a different component puts the data into the containers. That component first decrypts the data key, uses the plaintext data key to encrypt data, puts the encrypted data into the container, and then destroys the plaintext data key. In this system, the component that creates the containers never sees the plaintext data key.

GenerateDataKeyWithoutPlaintext returns a unique data key for each request. The bytes in the keys are not related to the caller or KMS key that is used to encrypt the private key.

To generate a data key, you must specify the symmetric KMS key that is used to encrypt the data key. You cannot use an asymmetric KMS key to generate a data key. To get the type of your KMS key, use the DescribeKey operation.

If the operation succeeds, you will find the encrypted copy of the data key in the CiphertextBlob field.

You can use the optional encryption context to add additional security to the encryption operation. If you specify an EncryptionContext, you must specify the same encryption context (a case-sensitive exact match) when decrypting the encrypted data key. Otherwise, the request to decrypt fails with an InvalidCiphertextException. For more information, see Encryption Context in the Key Management Service Developer Guide.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.

Required permissions: kms:GenerateDataKeyWithoutPlaintext (key policy)

Related operations:

  • Decrypt

  • Encrypt

  • GenerateDataKey

  • GenerateDataKeyPair

  • GenerateDataKeyPairWithoutPlaintext

Examples:

Example: To generate an encrypted data key


# The following example generates an encrypted copy of a 256-bit symmetric data encryption key (data key). The data key is
# encrypted with the specified KMS key.

resp = client.generate_data_key_without_plaintext({
  key_id: "alias/ExampleAlias", # The identifier of the KMS key to use to encrypt the data key. You can use the key ID or Amazon Resource Name (ARN) of the KMS key, or the name or ARN of an alias that refers to the KMS key.
  key_spec: "AES_256", # Specifies the type of data key to return.
})

resp.to_h outputs the following:
{
  ciphertext_blob: "<binary data>", # The encrypted data key.
  key_id: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The ARN of the KMS key that was used to encrypt the data key.
}

Request syntax with placeholder values


resp = client.generate_data_key_without_plaintext({
  key_id: "KeyIdType", # required
  encryption_context: {
    "EncryptionContextKey" => "EncryptionContextValue",
  },
  key_spec: "AES_256", # accepts AES_256, AES_128
  number_of_bytes: 1,
  grant_tokens: ["GrantTokenType"],
})

Response structure


resp.ciphertext_blob #=> String
resp.key_id #=> String

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    The identifier of the symmetric KMS key that encrypts the data key.

    To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    • Alias name: alias/ExampleAlias

    • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.

  • :encryption_context (Hash<String,String>)

    Specifies the encryption context that will be used when encrypting the data key.

    An encryption context is a collection of non-secret key-value pairs that represents additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is optional when encrypting with a symmetric KMS key, but it is highly recommended.

    For more information, see Encryption Context in the Key Management Service Developer Guide.

  • :key_spec (String)

    The length of the data key. Use AES_128 to generate a 128-bit symmetric key, or AES_256 to generate a 256-bit symmetric key.

  • :number_of_bytes (Integer)

    The length of the data key in bytes. For example, use the value 64 to generate a 512-bit data key (64 bytes is 512 bits). For common key lengths (128-bit and 256-bit symmetric keys), we recommend that you use the KeySpec field instead of this one.

  • :grant_tokens (Array<String>)

    A list of grant tokens.

    Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 3893

def generate_data_key_without_plaintext(params = {}, options = {})
  req = build_request(:generate_data_key_without_plaintext, params)
  req.send_request(options)
end

#generate_random(params = {}) ⇒ Types::GenerateRandomResponse

Returns a random byte string that is cryptographically secure.

By default, the random byte string is generated in KMS. To generate the byte string in the CloudHSM cluster that is associated with a custom key store, specify the custom key store ID.

Applications in Amazon Web Services Nitro Enclaves can call this operation by using the Amazon Web Services Nitro Enclaves Development Kit. For information about the supporting parameters, see How Amazon Web Services Nitro Enclaves use KMS in the Key Management Service Developer Guide.

For more information about entropy and random number generation, see Key Management Service Cryptographic Details.

Required permissions: kms:GenerateRandom (IAM policy)

Examples:

Example: To generate random data


# The following example generates 32 bytes of random data.

resp = client.generate_random({
  number_of_bytes: 32, # The length of the random data, specified in number of bytes.
})

resp.to_h outputs the following:
{
  plaintext: "<binary data>", # The random data.
}

Request syntax with placeholder values


resp = client.generate_random({
  number_of_bytes: 1,
  custom_key_store_id: "CustomKeyStoreIdType",
})

Response structure


resp.plaintext #=> String

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :number_of_bytes (Integer)

    The length of the byte string.

  • :custom_key_store_id (String)

    Generates the random byte string in the CloudHSM cluster that is associated with the specified custom key store. To find the ID of a custom key store, use the DescribeCustomKeyStores operation.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 3968

def generate_random(params = {}, options = {})
  req = build_request(:generate_random, params)
  req.send_request(options)
end

#get_key_policy(params = {}) ⇒ Types::GetKeyPolicyResponse

Gets a key policy attached to the specified KMS key.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:GetKeyPolicy (key policy)

Related operations: PutKeyPolicy

Examples:

Example: To retrieve a key policy


# The following example retrieves the key policy for the specified KMS key.

resp = client.get_key_policy({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key whose key policy you want to retrieve. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
  policy_name: "default", # The name of the key policy to retrieve.
})

resp.to_h outputs the following:
{
  policy: "{\n  \"Version\" : \"2012-10-17\",\n  \"Id\" : \"key-default-1\",\n  \"Statement\" : [ {\n    \"Sid\" : \"Enable IAM User Permissions\",\n    \"Effect\" : \"Allow\",\n    \"Principal\" : {\n      \"AWS\" : \"arn:aws:iam::111122223333:root\"\n    },\n    \"Action\" : \"kms:*\",\n    \"Resource\" : \"*\"\n  } ]\n}", # The key policy document.
}

Request syntax with placeholder values


resp = client.get_key_policy({
  key_id: "KeyIdType", # required
  policy_name: "PolicyNameType", # required
})

Response structure


resp.policy #=> String

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Gets the key policy for the specified KMS key.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :policy_name (required, String)

    Specifies the name of the key policy. The only valid name is default. To get the names of key policies, use ListKeyPolicies.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 4039

def get_key_policy(params = {}, options = {})
  req = build_request(:get_key_policy, params)
  req.send_request(options)
end

#get_key_rotation_status(params = {}) ⇒ Types::GetKeyRotationStatusResponse

Gets a Boolean value that indicates whether automatic rotation of the key material is enabled for the specified KMS key.

You cannot enable automatic rotation of asymmetric KMS keys, KMS keys with imported key material, or KMS keys in a custom key store. To enable or disable automatic rotation of a set of related multi-Region keys, set the property on the primary key. The key rotation status for these KMS keys is always false.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

  • Disabled: The key rotation status does not change when you disable a KMS key. However, while the KMS key is disabled, KMS does not rotate the key material.

  • Pending deletion: While a KMS key is pending deletion, its key rotation status is false and KMS does not rotate the key material. If you cancel the deletion, the original key rotation status is restored.

Cross-account use: Yes. To perform this operation on a KMS key in a different Amazon Web Services account, specify the key ARN in the value of the KeyId parameter.

Required permissions: kms:GetKeyRotationStatus (key policy)

Related operations:

  • DisableKeyRotation

  • EnableKeyRotation

Examples:

Example: To retrieve the rotation status for a KMS key


# The following example retrieves the status of automatic annual rotation of the key material for the specified KMS key.

resp = client.get_key_rotation_status({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key whose key material rotation status you want to retrieve. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

resp.to_h outputs the following:
{
  key_rotation_enabled: true, # A boolean that indicates the key material rotation status. Returns true when automatic annual rotation of the key material is enabled, or false when it is not.
}

Request syntax with placeholder values


resp = client.get_key_rotation_status({
  key_id: "KeyIdType", # required
})

Response structure


resp.key_rotation_enabled #=> Boolean

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Gets the rotation status for the specified KMS key.

    Specify the key ID or key ARN of the KMS key. To specify a KMS key in a different Amazon Web Services account, you must use the key ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 4136

def get_key_rotation_status(params = {}, options = {})
  req = build_request(:get_key_rotation_status, params)
  req.send_request(options)
end

#get_parameters_for_import(params = {}) ⇒ Types::GetParametersForImportResponse

Returns the items you need to import key material into a symmetric, customer managed KMS key. For more information about importing key material into KMS, see Importing Key Material in the Key Management Service Developer Guide.

This operation returns a public key and an import token. Use the public key to encrypt the symmetric key material. Store the import token to send with a subsequent ImportKeyMaterial request.

You must specify the key ID of the symmetric KMS key into which you will import key material. This KMS key's Origin must be EXTERNAL. You must also specify the wrapping algorithm and type of wrapping key (public key) that you will use to encrypt the key material. You cannot perform this operation on an asymmetric KMS key or on any KMS key in a different Amazon Web Services account.

To import key material, you must use the public key and import token from the same response. These items are valid for 24 hours. The expiration date and time appear in the GetParametersForImport response. You cannot use an expired token in an ImportKeyMaterial request. If your key and token expire, send another GetParametersForImport request.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:GetParametersForImport (key policy)

Related operations:

  • ImportKeyMaterial

  • DeleteImportedKeyMaterial

Examples:

Example: To retrieve the public key and import token for a KMS key


# The following example retrieves the public key and import token for the specified KMS key.

resp = client.get_parameters_for_import({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key for which to retrieve the public key and import token. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
  wrapping_algorithm: "RSAES_OAEP_SHA_1", # The algorithm that you will use to encrypt the key material before importing it.
  wrapping_key_spec: "RSA_2048", # The type of wrapping key (public key) to return in the response.
})

resp.to_h outputs the following:
{
  import_token: "<binary data>", # The import token to send with a subsequent ImportKeyMaterial request.
  key_id: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The ARN of the KMS key for which you are retrieving the public key and import token. This is the same KMS key specified in the request.
  parameters_valid_to: Time.parse("2016-12-01T14:52:17-08:00"), # The time at which the import token and public key are no longer valid.
  public_key: "<binary data>", # The public key to use to encrypt the key material before importing it.
}

Request syntax with placeholder values


resp = client.get_parameters_for_import({
  key_id: "KeyIdType", # required
  wrapping_algorithm: "RSAES_PKCS1_V1_5", # required, accepts RSAES_PKCS1_V1_5, RSAES_OAEP_SHA_1, RSAES_OAEP_SHA_256
  wrapping_key_spec: "RSA_2048", # required, accepts RSA_2048
})

Response structure


resp.key_id #=> String
resp.import_token #=> String
resp.public_key #=> String
resp.parameters_valid_to #=> Time

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    The identifier of the symmetric KMS key into which you will import key material. The Origin of the KMS key must be EXTERNAL.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :wrapping_algorithm (required, String)

    The algorithm you will use to encrypt the key material before importing it with ImportKeyMaterial. For more information, see Encrypt the Key Material in the Key Management Service Developer Guide.

  • :wrapping_key_spec (required, String)

    The type of wrapping key (public key) to return in the response. Only 2048-bit RSA public keys are supported.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 4261

def get_parameters_for_import(params = {}, options = {})
  req = build_request(:get_parameters_for_import, params)
  req.send_request(options)
end

#get_public_key(params = {}) ⇒ Types::GetPublicKeyResponse

Returns the public key of an asymmetric KMS key. Unlike the private key of a asymmetric KMS key, which never leaves KMS unencrypted, callers with kms:GetPublicKey permission can download the public key of an asymmetric KMS key. You can share the public key to allow others to encrypt messages and verify signatures outside of KMS. For information about symmetric and asymmetric KMS keys, see Using Symmetric and Asymmetric KMS keys in the Key Management Service Developer Guide.

You do not need to download the public key. Instead, you can use the public key within KMS by calling the Encrypt, ReEncrypt, or Verify operations with the identifier of an asymmetric KMS key. When you use the public key within KMS, you benefit from the authentication, authorization, and logging that are part of every KMS operation. You also reduce of risk of encrypting data that cannot be decrypted. These features are not effective outside of KMS. For details, see Special Considerations for Downloading Public Keys.

To help you use the public key safely outside of KMS, GetPublicKey returns important information about the public key in the response, including:

  • KeySpec: The type of key material in the public key, such as RSA_4096 or ECC_NIST_P521.

  • KeyUsage: Whether the key is used for encryption or signing.

  • EncryptionAlgorithms or SigningAlgorithms: A list of the encryption algorithms or the signing algorithms for the key.

Although KMS cannot enforce these restrictions on external operations, it is crucial that you use this information to prevent the public key from being used improperly. For example, you can prevent a public signing key from being used encrypt data, or prevent a public key from being used with an encryption algorithm that is not supported by KMS. You can also avoid errors, such as using the wrong signing algorithm in a verification operation.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.

Required permissions: kms:GetPublicKey (key policy)

Related operations: CreateKey

Examples:

Example: To download the public key of an asymmetric KMS key


# This example gets the public key of an asymmetric RSA KMS key used for encryption and decryption. The operation returns
# the key spec, key usage, and encryption or signing algorithms to help you use the public key correctly outside of AWS
# KMS.

resp = client.get_public_key({
  key_id: "arn:aws:kms:us-west-2:111122223333:key/0987dcba-09fe-87dc-65ba-ab0987654321", # The key ARN of the asymmetric KMS key.
})

resp.to_h outputs the following:
{
  customer_master_key_spec: "RSA_4096", # The key spec of the asymmetric KMS key from which the public key was downloaded.
  encryption_algorithms: [
    "RSAES_OAEP_SHA_1", 
    "RSAES_OAEP_SHA_256", 
  ], # The encryption algorithms supported by the asymmetric KMS key that was downloaded.
  key_id: "arn:aws:kms:us-west-2:111122223333:key/0987dcba-09fe-87dc-65ba-ab0987654321", # The key ARN of the asymmetric KMS key from which the public key was downloaded.
  key_usage: "ENCRYPT_DECRYPT", # The key usage of the asymmetric KMS key from which the public key was downloaded.
  public_key: "<binary data>", # The public key (plaintext) of the asymmetric KMS key.
}

Request syntax with placeholder values


resp = client.get_public_key({
  key_id: "KeyIdType", # required
  grant_tokens: ["GrantTokenType"],
})

Response structure


resp.key_id #=> String
resp.public_key #=> String
resp.customer_master_key_spec #=> String, one of "RSA_2048", "RSA_3072", "RSA_4096", "ECC_NIST_P256", "ECC_NIST_P384", "ECC_NIST_P521", "ECC_SECG_P256K1", "SYMMETRIC_DEFAULT"
resp.key_spec #=> String, one of "RSA_2048", "RSA_3072", "RSA_4096", "ECC_NIST_P256", "ECC_NIST_P384", "ECC_NIST_P521", "ECC_SECG_P256K1", "SYMMETRIC_DEFAULT"
resp.key_usage #=> String, one of "SIGN_VERIFY", "ENCRYPT_DECRYPT"
resp.encryption_algorithms #=> Array
resp.encryption_algorithms[0] #=> String, one of "SYMMETRIC_DEFAULT", "RSAES_OAEP_SHA_1", "RSAES_OAEP_SHA_256"
resp.signing_algorithms #=> Array
resp.signing_algorithms[0] #=> String, one of "RSASSA_PSS_SHA_256", "RSASSA_PSS_SHA_384", "RSASSA_PSS_SHA_512", "RSASSA_PKCS1_V1_5_SHA_256", "RSASSA_PKCS1_V1_5_SHA_384", "RSASSA_PKCS1_V1_5_SHA_512", "ECDSA_SHA_256", "ECDSA_SHA_384", "ECDSA_SHA_512"

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies the asymmetric KMS key that includes the public key.

    To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    • Alias name: alias/ExampleAlias

    • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.

  • :grant_tokens (Array<String>)

    A list of grant tokens.

    Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 4418

def get_public_key(params = {}, options = {})
  req = build_request(:get_public_key, params)
  req.send_request(options)
end

#import_key_material(params = {}) ⇒ Struct

Imports key material into an existing symmetric KMS KMS key that was created without key material. After you successfully import key material into a KMS key, you can reimport the same key material into that KMS key, but you cannot import different key material.

You cannot perform this operation on an asymmetric KMS key or on any KMS key in a different Amazon Web Services account. For more information about creating KMS keys with no key material and then importing key material, see Importing Key Material in the Key Management Service Developer Guide.

Before using this operation, call GetParametersForImport. Its response includes a public key and an import token. Use the public key to encrypt the key material. Then, submit the import token from the same GetParametersForImport response.

When calling this operation, you must specify the following values:

  • The key ID or key ARN of a KMS key with no key material. Its Origin must be EXTERNAL.

    To create a KMS key with no key material, call CreateKey and set the value of its Origin parameter to EXTERNAL. To get the Origin of a KMS key, call DescribeKey.)

  • The encrypted key material. To get the public key to encrypt the key material, call GetParametersForImport.

  • The import token that GetParametersForImport returned. You must use a public key and token from the same GetParametersForImport response.

  • Whether the key material expires and if so, when. If you set an expiration date, KMS deletes the key material from the KMS key on the specified date, and the KMS key becomes unusable. To use the KMS key again, you must reimport the same key material. The only way to change an expiration date is by reimporting the same key material and specifying a new expiration date.

When this operation is successful, the key state of the KMS key changes from PendingImport to Enabled, and you can use the KMS key.

If this operation fails, use the exception to help determine the problem. If the error is related to the key material, the import token, or wrapping key, use GetParametersForImport to get a new public key and import token for the KMS key and repeat the import procedure. For help, see How To Import Key Material in the Key Management Service Developer Guide.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:ImportKeyMaterial (key policy)

Related operations:

  • DeleteImportedKeyMaterial

  • GetParametersForImport

Examples:

Example: To import key material into a KMS key


# The following example imports key material into the specified KMS key.

resp = client.import_key_material({
  encrypted_key_material: "<binary data>", # The encrypted key material to import.
  expiration_model: "KEY_MATERIAL_DOES_NOT_EXPIRE", # A value that specifies whether the key material expires.
  import_token: "<binary data>", # The import token that you received in the response to a previous GetParametersForImport request.
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key to import the key material into. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

Request syntax with placeholder values


resp = client.import_key_material({
  key_id: "KeyIdType", # required
  import_token: "data", # required
  encrypted_key_material: "data", # required
  valid_to: Time.now,
  expiration_model: "KEY_MATERIAL_EXPIRES", # accepts KEY_MATERIAL_EXPIRES, KEY_MATERIAL_DOES_NOT_EXPIRE
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    The identifier of the symmetric KMS key that receives the imported key material. The KMS key's Origin must be EXTERNAL. This must be the same KMS key specified in the KeyID parameter of the corresponding GetParametersForImport request.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :import_token (required, String, StringIO, File)

    The import token that you received in the response to a previous GetParametersForImport request. It must be from the same response that contained the public key that you used to encrypt the key material.

  • :encrypted_key_material (required, String, StringIO, File)

    The encrypted key material to import. The key material must be encrypted with the public wrapping key that GetParametersForImport returned, using the wrapping algorithm that you specified in the same GetParametersForImport request.

  • :valid_to (Time, DateTime, Date, Integer, String)

    The time at which the imported key material expires. When the key material expires, KMS deletes the key material and the KMS key becomes unusable. You must omit this parameter when the ExpirationModel parameter is set to KEY_MATERIAL_DOES_NOT_EXPIRE. Otherwise it is required.

  • :expiration_model (String)

    Specifies whether the key material expires. The default is KEY_MATERIAL_EXPIRES, in which case you must include the ValidTo parameter. When this parameter is set to KEY_MATERIAL_DOES_NOT_EXPIRE, you must omit the ValidTo parameter.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 4566

def import_key_material(params = {}, options = {})
  req = build_request(:import_key_material, params)
  req.send_request(options)
end

#list_aliases(params = {}) ⇒ Types::ListAliasesResponse

Gets a list of aliases in the caller's Amazon Web Services account and region. For more information about aliases, see CreateAlias.

By default, the ListAliases operation returns all aliases in the account and region. To get only the aliases associated with a particular KMS key, use the KeyId parameter.

The ListAliases response can include aliases that you created and associated with your customer managed keys, and aliases that Amazon Web Services created and associated with Amazon Web Services managed keys in your account. You can recognize Amazon Web Services aliases because their names have the format aws/<service-name>, such as aws/dynamodb.

The response might also include aliases that have no TargetKeyId field. These are predefined aliases that Amazon Web Services has created but has not yet associated with a KMS key. Aliases that Amazon Web Services creates in your account, including predefined aliases, do not count against your KMS aliases quota.

Cross-account use: No. ListAliases does not return aliases in other Amazon Web Services accounts.

Required permissions: kms:ListAliases (IAM policy)

For details, see Controlling access to aliases in the Key Management Service Developer Guide.

Related operations:

  • CreateAlias

  • DeleteAlias

  • UpdateAlias

The returned response is a pageable response and is Enumerable. For details on usage see PageableResponse.

Examples:

Example: To list aliases


# The following example lists aliases.

resp = client.list_aliases({
})

resp.to_h outputs the following:
{
  aliases: [
    {
      alias_arn: "arn:aws:kms:us-east-2:111122223333:alias/aws/acm", 
      alias_name: "alias/aws/acm", 
      target_key_id: "da03f6f7-d279-427a-9cae-de48d07e5b66", 
    }, 
    {
      alias_arn: "arn:aws:kms:us-east-2:111122223333:alias/aws/ebs", 
      alias_name: "alias/aws/ebs", 
      target_key_id: "25a217e7-7170-4b8c-8bf6-045ea5f70e5b", 
    }, 
    {
      alias_arn: "arn:aws:kms:us-east-2:111122223333:alias/aws/rds", 
      alias_name: "alias/aws/rds", 
      target_key_id: "7ec3104e-c3f2-4b5c-bf42-bfc4772c6685", 
    }, 
    {
      alias_arn: "arn:aws:kms:us-east-2:111122223333:alias/aws/redshift", 
      alias_name: "alias/aws/redshift", 
      target_key_id: "08f7a25a-69e2-4fb5-8f10-393db27326fa", 
    }, 
    {
      alias_arn: "arn:aws:kms:us-east-2:111122223333:alias/aws/s3", 
      alias_name: "alias/aws/s3", 
      target_key_id: "d2b0f1a3-580d-4f79-b836-bc983be8cfa5", 
    }, 
    {
      alias_arn: "arn:aws:kms:us-east-2:111122223333:alias/example1", 
      alias_name: "alias/example1", 
      target_key_id: "4da1e216-62d0-46c5-a7c0-5f3a3d2f8046", 
    }, 
    {
      alias_arn: "arn:aws:kms:us-east-2:111122223333:alias/example2", 
      alias_name: "alias/example2", 
      target_key_id: "f32fef59-2cc2-445b-8573-2d73328acbee", 
    }, 
    {
      alias_arn: "arn:aws:kms:us-east-2:111122223333:alias/example3", 
      alias_name: "alias/example3", 
      target_key_id: "1374ef38-d34e-4d5f-b2c9-4e0daee38855", 
    }, 
  ], # A list of aliases, including the key ID of the KMS key that each alias refers to.
  truncated: false, # A boolean that indicates whether there are more items in the list. Returns true when there are more items, or false when there are not.
}

Request syntax with placeholder values


resp = client.list_aliases({
  key_id: "KeyIdType",
  limit: 1,
  marker: "MarkerType",
})

Response structure


resp.aliases #=> Array
resp.aliases[0].alias_name #=> String
resp.aliases[0].alias_arn #=> String
resp.aliases[0].target_key_id #=> String
resp.aliases[0].creation_date #=> Time
resp.aliases[0].last_updated_date #=> Time
resp.next_marker #=> String
resp.truncated #=> Boolean

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (String)

    Lists only aliases that are associated with the specified KMS key. Enter a KMS key in your Amazon Web Services account.

    This parameter is optional. If you omit it, ListAliases returns all aliases in the account and Region.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :limit (Integer)

    Use this parameter to specify the maximum number of items to return. When this value is present, KMS does not return more than the specified number of items, but it might return fewer.

    This value is optional. If you include a value, it must be between 1 and 100, inclusive. If you do not include a value, it defaults to 50.

  • :marker (String)

    Use this parameter in a subsequent request after you receive a response with truncated results. Set it to the value of NextMarker from the truncated response you just received.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 4731

def list_aliases(params = {}, options = {})
  req = build_request(:list_aliases, params)
  req.send_request(options)
end

#list_grants(params = {}) ⇒ Types::ListGrantsResponse

Gets a list of all grants for the specified KMS key.

You must specify the KMS key in all requests. You can filter the grant list by grant ID or grantee principal.

For detailed information about grants, including grant terminology, see Using grants in the Key Management Service Developer Guide . For examples of working with grants in several programming languages, see Programming grants.

The GranteePrincipal field in the ListGrants response usually contains the user or role designated as the grantee principal in the grant. However, when the grantee principal in the grant is an Amazon Web Services service, the GranteePrincipal field contains the service principal, which might represent several different grantee principals.

Cross-account use: Yes. To perform this operation on a KMS key in a different Amazon Web Services account, specify the key ARN in the value of the KeyId parameter.

Required permissions: kms:ListGrants (key policy)

Related operations:

  • CreateGrant

  • ListRetirableGrants

  • RetireGrant

  • RevokeGrant

The returned response is a pageable response and is Enumerable. For details on usage see PageableResponse.

Examples:

Example: To list grants for a KMS key


# The following example lists grants for the specified KMS key.

resp = client.list_grants({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key whose grants you want to list. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

resp.to_h outputs the following:
{
  grants: [
    {
      creation_date: Time.parse("2016-10-25T14:37:41-07:00"), 
      grant_id: "91ad875e49b04a9d1f3bdeb84d821f9db6ea95e1098813f6d47f0c65fbe2a172", 
      grantee_principal: "acm.us-east-2.amazonaws.com", 
      issuing_account: "arn:aws:iam::111122223333:root", 
      key_id: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", 
      operations: [
        "Encrypt", 
        "ReEncryptFrom", 
        "ReEncryptTo", 
      ], 
      retiring_principal: "acm.us-east-2.amazonaws.com", 
    }, 
    {
      creation_date: Time.parse("2016-10-25T14:37:41-07:00"), 
      grant_id: "a5d67d3e207a8fc1f4928749ee3e52eb0440493a8b9cf05bbfad91655b056200", 
      grantee_principal: "acm.us-east-2.amazonaws.com", 
      issuing_account: "arn:aws:iam::111122223333:root", 
      key_id: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", 
      operations: [
        "ReEncryptFrom", 
        "ReEncryptTo", 
      ], 
      retiring_principal: "acm.us-east-2.amazonaws.com", 
    }, 
    {
      creation_date: Time.parse("2016-10-25T14:37:41-07:00"), 
      grant_id: "c541aaf05d90cb78846a73b346fc43e65be28b7163129488c738e0c9e0628f4f", 
      grantee_principal: "acm.us-east-2.amazonaws.com", 
      issuing_account: "arn:aws:iam::111122223333:root", 
      key_id: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", 
      operations: [
        "Encrypt", 
        "ReEncryptFrom", 
        "ReEncryptTo", 
      ], 
      retiring_principal: "acm.us-east-2.amazonaws.com", 
    }, 
    {
      creation_date: Time.parse("2016-10-25T14:37:41-07:00"), 
      grant_id: "dd2052c67b4c76ee45caf1dc6a1e2d24e8dc744a51b36ae2f067dc540ce0105c", 
      grantee_principal: "acm.us-east-2.amazonaws.com", 
      issuing_account: "arn:aws:iam::111122223333:root", 
      key_id: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", 
      operations: [
        "Encrypt", 
        "ReEncryptFrom", 
        "ReEncryptTo", 
      ], 
      retiring_principal: "acm.us-east-2.amazonaws.com", 
    }, 
  ], # A list of grants.
  truncated: true, # A boolean that indicates whether there are more items in the list. Returns true when there are more items, or false when there are not.
}

Request syntax with placeholder values


resp = client.list_grants({
  limit: 1,
  marker: "MarkerType",
  key_id: "KeyIdType", # required
  grant_id: "GrantIdType",
  grantee_principal: "PrincipalIdType",
})

Response structure


resp.grants #=> Array
resp.grants[0].key_id #=> String
resp.grants[0].grant_id #=> String
resp.grants[0].name #=> String
resp.grants[0].creation_date #=> Time
resp.grants[0].grantee_principal #=> String
resp.grants[0].retiring_principal #=> String
resp.grants[0]. #=> String
resp.grants[0].operations #=> Array
resp.grants[0].operations[0] #=> String, one of "Decrypt", "Encrypt", "GenerateDataKey", "GenerateDataKeyWithoutPlaintext", "ReEncryptFrom", "ReEncryptTo", "Sign", "Verify", "GetPublicKey", "CreateGrant", "RetireGrant", "DescribeKey", "GenerateDataKeyPair", "GenerateDataKeyPairWithoutPlaintext"
resp.grants[0].constraints.encryption_context_subset #=> Hash
resp.grants[0].constraints.encryption_context_subset["EncryptionContextKey"] #=> String
resp.grants[0].constraints.encryption_context_equals #=> Hash
resp.grants[0].constraints.encryption_context_equals["EncryptionContextKey"] #=> String
resp.next_marker #=> String
resp.truncated #=> Boolean

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :limit (Integer)

    Use this parameter to specify the maximum number of items to return. When this value is present, KMS does not return more than the specified number of items, but it might return fewer.

    This value is optional. If you include a value, it must be between 1 and 100, inclusive. If you do not include a value, it defaults to 50.

  • :marker (String)

    Use this parameter in a subsequent request after you receive a response with truncated results. Set it to the value of NextMarker from the truncated response you just received.

  • :key_id (required, String)

    Returns only grants for the specified KMS key. This parameter is required.

    Specify the key ID or key ARN of the KMS key. To specify a KMS key in a different Amazon Web Services account, you must use the key ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :grant_id (String)

    Returns only the grant with the specified grant ID. The grant ID uniquely identifies the grant.

  • :grantee_principal (String)

    Returns only grants where the specified principal is the grantee principal for the grant.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 4924

def list_grants(params = {}, options = {})
  req = build_request(:list_grants, params)
  req.send_request(options)
end

#list_key_policies(params = {}) ⇒ Types::ListKeyPoliciesResponse

Gets the names of the key policies that are attached to a KMS key. This operation is designed to get policy names that you can use in a GetKeyPolicy operation. However, the only valid policy name is default.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:ListKeyPolicies (key policy)

Related operations:

  • GetKeyPolicy

  • PutKeyPolicy

The returned response is a pageable response and is Enumerable. For details on usage see PageableResponse.

Examples:

Example: To list key policies for a KMS key


# The following example lists key policies for the specified KMS key.

resp = client.list_key_policies({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key whose key policies you want to list. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

resp.to_h outputs the following:
{
  policy_names: [
    "default", 
  ], # A list of key policy names.
  truncated: false, # A boolean that indicates whether there are more items in the list. Returns true when there are more items, or false when there are not.
}

Request syntax with placeholder values


resp = client.list_key_policies({
  key_id: "KeyIdType", # required
  limit: 1,
  marker: "MarkerType",
})

Response structure


resp.policy_names #=> Array
resp.policy_names[0] #=> String
resp.next_marker #=> String
resp.truncated #=> Boolean

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Gets the names of key policies for the specified KMS key.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :limit (Integer)

    Use this parameter to specify the maximum number of items to return. When this value is present, KMS does not return more than the specified number of items, but it might return fewer.

    This value is optional. If you include a value, it must be between 1 and 1000, inclusive. If you do not include a value, it defaults to 100.

    Only one policy can be attached to a key.

  • :marker (String)

    Use this parameter in a subsequent request after you receive a response with truncated results. Set it to the value of NextMarker from the truncated response you just received.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 5024

def list_key_policies(params = {}, options = {})
  req = build_request(:list_key_policies, params)
  req.send_request(options)
end

#list_keys(params = {}) ⇒ Types::ListKeysResponse

Gets a list of all KMS keys in the caller's Amazon Web Services account and Region.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:ListKeys (IAM policy)

Related operations:

  • CreateKey

  • DescribeKey

  • ListAliases

  • ListResourceTags

The returned response is a pageable response and is Enumerable. For details on usage see PageableResponse.

Examples:

Example: To list KMS keys


# The following example lists KMS keys.

resp = client.list_keys({
})

resp.to_h outputs the following:
{
  keys: [
    {
      key_arn: "arn:aws:kms:us-east-2:111122223333:key/0d990263-018e-4e65-a703-eff731de951e", 
      key_id: "0d990263-018e-4e65-a703-eff731de951e", 
    }, 
    {
      key_arn: "arn:aws:kms:us-east-2:111122223333:key/144be297-0ae1-44ac-9c8f-93cd8c82f841", 
      key_id: "144be297-0ae1-44ac-9c8f-93cd8c82f841", 
    }, 
    {
      key_arn: "arn:aws:kms:us-east-2:111122223333:key/21184251-b765-428e-b852-2c7353e72571", 
      key_id: "21184251-b765-428e-b852-2c7353e72571", 
    }, 
    {
      key_arn: "arn:aws:kms:us-east-2:111122223333:key/214fe92f-5b03-4ae1-b350-db2a45dbe10c", 
      key_id: "214fe92f-5b03-4ae1-b350-db2a45dbe10c", 
    }, 
    {
      key_arn: "arn:aws:kms:us-east-2:111122223333:key/339963f2-e523-49d3-af24-a0fe752aa458", 
      key_id: "339963f2-e523-49d3-af24-a0fe752aa458", 
    }, 
    {
      key_arn: "arn:aws:kms:us-east-2:111122223333:key/b776a44b-df37-4438-9be4-a27494e4271a", 
      key_id: "b776a44b-df37-4438-9be4-a27494e4271a", 
    }, 
    {
      key_arn: "arn:aws:kms:us-east-2:111122223333:key/deaf6c9e-cf2c-46a6-bf6d-0b6d487cffbb", 
      key_id: "deaf6c9e-cf2c-46a6-bf6d-0b6d487cffbb", 
    }, 
  ], # A list of KMS keys, including the key ID and Amazon Resource Name (ARN) of each one.
  truncated: false, # A boolean that indicates whether there are more items in the list. Returns true when there are more items, or false when there are not.
}

Request syntax with placeholder values


resp = client.list_keys({
  limit: 1,
  marker: "MarkerType",
})

Response structure


resp.keys #=> Array
resp.keys[0].key_id #=> String
resp.keys[0].key_arn #=> String
resp.next_marker #=> String
resp.truncated #=> Boolean

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :limit (Integer)

    Use this parameter to specify the maximum number of items to return. When this value is present, KMS does not return more than the specified number of items, but it might return fewer.

    This value is optional. If you include a value, it must be between 1 and 1000, inclusive. If you do not include a value, it defaults to 100.

  • :marker (String)

    Use this parameter in a subsequent request after you receive a response with truncated results. Set it to the value of NextMarker from the truncated response you just received.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 5135

def list_keys(params = {}, options = {})
  req = build_request(:list_keys, params)
  req.send_request(options)
end

#list_resource_tags(params = {}) ⇒ Types::ListResourceTagsResponse

Returns all tags on the specified KMS key.

For general information about tags, including the format and syntax, see Tagging Amazon Web Services resources in the Amazon Web Services General Reference. For information about using tags in KMS, see Tagging keys.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:ListResourceTags (key policy)

Related operations:

  • CreateKey

  • ReplicateKey

  • TagResource

  • UntagResource

Examples:

Example: To list tags for a KMS key


# The following example lists tags for a KMS key.

resp = client.list_resource_tags({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key whose tags you are listing. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

resp.to_h outputs the following:
{
  tags: [
    {
      tag_key: "CostCenter", 
      tag_value: "87654", 
    }, 
    {
      tag_key: "CreatedBy", 
      tag_value: "ExampleUser", 
    }, 
    {
      tag_key: "Purpose", 
      tag_value: "Test", 
    }, 
  ], # A list of tags.
  truncated: false, # A boolean that indicates whether there are more items in the list. Returns true when there are more items, or false when there are not.
}

Request syntax with placeholder values


resp = client.list_resource_tags({
  key_id: "KeyIdType", # required
  limit: 1,
  marker: "MarkerType",
})

Response structure


resp.tags #=> Array
resp.tags[0].tag_key #=> String
resp.tags[0].tag_value #=> String
resp.next_marker #=> String
resp.truncated #=> Boolean

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Gets tags on the specified KMS key.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :limit (Integer)

    Use this parameter to specify the maximum number of items to return. When this value is present, KMS does not return more than the specified number of items, but it might return fewer.

    This value is optional. If you include a value, it must be between 1 and 50, inclusive. If you do not include a value, it defaults to 50.

  • :marker (String)

    Use this parameter in a subsequent request after you receive a response with truncated results. Set it to the value of NextMarker from the truncated response you just received.

    Do not attempt to construct this value. Use only the value of NextMarker from the truncated response you just received.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 5253

def list_resource_tags(params = {}, options = {})
  req = build_request(:list_resource_tags, params)
  req.send_request(options)
end

#list_retirable_grants(params = {}) ⇒ Types::ListGrantsResponse

Returns information about all grants in the Amazon Web Services account and Region that have the specified retiring principal.

You can specify any principal in your Amazon Web Services account. The grants that are returned include grants for KMS keys in your Amazon Web Services account and other Amazon Web Services accounts. You might use this operation to determine which grants you may retire. To retire a grant, use the RetireGrant operation.

For detailed information about grants, including grant terminology, see Using grants in the Key Management Service Developer Guide . For examples of working with grants in several programming languages, see Programming grants.

Cross-account use: You must specify a principal in your Amazon Web Services account. However, this operation can return grants in any Amazon Web Services account. You do not need kms:ListRetirableGrants permission (or any other additional permission) in any Amazon Web Services account other than your own.

Required permissions: kms:ListRetirableGrants (IAM policy) in your Amazon Web Services account.

Related operations:

  • CreateGrant

  • ListGrants

  • RetireGrant

  • RevokeGrant

Examples:

Example: To list grants that the specified principal can retire


# The following example lists the grants that the specified principal (identity) can retire.

resp = client.list_retirable_grants({
  retiring_principal: "arn:aws:iam::111122223333:role/ExampleRole", # The retiring principal whose grants you want to list. Use the Amazon Resource Name (ARN) of a principal such as an AWS account (root), IAM user, federated user, or assumed role user.
})

resp.to_h outputs the following:
{
  grants: [
    {
      creation_date: Time.parse("2016-12-07T11:09:35-08:00"), 
      grant_id: "0c237476b39f8bc44e45212e08498fbe3151305030726c0590dd8d3e9f3d6a60", 
      grantee_principal: "arn:aws:iam::111122223333:role/ExampleRole", 
      issuing_account: "arn:aws:iam::444455556666:root", 
      key_id: "arn:aws:kms:us-east-2:444455556666:key/1234abcd-12ab-34cd-56ef-1234567890ab", 
      operations: [
        "Decrypt", 
        "Encrypt", 
      ], 
      retiring_principal: "arn:aws:iam::111122223333:role/ExampleRole", 
    }, 
  ], # A list of grants that the specified principal can retire.
  truncated: false, # A boolean that indicates whether there are more items in the list. Returns true when there are more items, or false when there are not.
}

Request syntax with placeholder values


resp = client.list_retirable_grants({
  limit: 1,
  marker: "MarkerType",
  retiring_principal: "PrincipalIdType", # required
})

Response structure


resp.grants #=> Array
resp.grants[0].key_id #=> String
resp.grants[0].grant_id #=> String
resp.grants[0].name #=> String
resp.grants[0].creation_date #=> Time
resp.grants[0].grantee_principal #=> String
resp.grants[0].retiring_principal #=> String
resp.grants[0]. #=> String
resp.grants[0].operations #=> Array
resp.grants[0].operations[0] #=> String, one of "Decrypt", "Encrypt", "GenerateDataKey", "GenerateDataKeyWithoutPlaintext", "ReEncryptFrom", "ReEncryptTo", "Sign", "Verify", "GetPublicKey", "CreateGrant", "RetireGrant", "DescribeKey", "GenerateDataKeyPair", "GenerateDataKeyPairWithoutPlaintext"
resp.grants[0].constraints.encryption_context_subset #=> Hash
resp.grants[0].constraints.encryption_context_subset["EncryptionContextKey"] #=> String
resp.grants[0].constraints.encryption_context_equals #=> Hash
resp.grants[0].constraints.encryption_context_equals["EncryptionContextKey"] #=> String
resp.next_marker #=> String
resp.truncated #=> Boolean

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :limit (Integer)

    Use this parameter to specify the maximum number of items to return. When this value is present, KMS does not return more than the specified number of items, but it might return fewer.

    This value is optional. If you include a value, it must be between 1 and 100, inclusive. If you do not include a value, it defaults to 50.

  • :marker (String)

    Use this parameter in a subsequent request after you receive a response with truncated results. Set it to the value of NextMarker from the truncated response you just received.

  • :retiring_principal (required, String)

    The retiring principal for which to list grants. Enter a principal in your Amazon Web Services account.

    To specify the retiring principal, use the Amazon Resource Name (ARN) of an Amazon Web Services principal. Valid Amazon Web Services principals include Amazon Web Services accounts (root), IAM users, federated users, and assumed role users. For examples of the ARN syntax for specifying a principal, see Amazon Web Services Identity and Access Management (IAM) in the Example ARNs section of the Amazon Web Services General Reference.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 5392

def list_retirable_grants(params = {}, options = {})
  req = build_request(:list_retirable_grants, params)
  req.send_request(options)
end

#put_key_policy(params = {}) ⇒ Struct

Attaches a key policy to the specified KMS key.

For more information about key policies, see Key Policies in the Key Management Service Developer Guide. For help writing and formatting a JSON policy document, see the IAM JSON Policy Reference in the Identity and Access Management User Guide . For examples of adding a key policy in multiple programming languages, see Setting a key policy in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:PutKeyPolicy (key policy)

Related operations: GetKeyPolicy

Examples:

Example: To attach a key policy to a KMS key


# The following example attaches a key policy to the specified KMS key.

resp = client.put_key_policy({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key to attach the key policy to. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
  policy: "{\"Version\":\"2012-10-17\",\"Id\":\"custom-policy-2016-12-07\",\"Statement\":[{\"Sid\":\"EnableIAMUserPermissions\",\"Effect\":\"Allow\",\"Principal\":{\"AWS\":\"arn:aws:iam::111122223333:root\"},\"Action\":\"kms:*\",\"Resource\":\"*\"},{\"Sid\":\"AllowaccessforKeyAdministrators\",\"Effect\":\"Allow\",\"Principal\":{\"AWS\":[\"arn:aws:iam::111122223333:user/ExampleAdminUser\",\"arn:aws:iam::111122223333:role/ExampleAdminRole\"]},\"Action\":[\"kms:Create*\",\"kms:Describe*\",\"kms:Enable*\",\"kms:List*\",\"kms:Put*\",\"kms:Update*\",\"kms:Revoke*\",\"kms:Disable*\",\"kms:Get*\",\"kms:Delete*\",\"kms:ScheduleKeyDeletion\",\"kms:CancelKeyDeletion\"],\"Resource\":\"*\"},{\"Sid\":\"Allowuseofthekey\",\"Effect\":\"Allow\",\"Principal\":{\"AWS\":\"arn:aws:iam::111122223333:role/ExamplePowerUserRole\"},\"Action\":[\"kms:Encrypt\",\"kms:Decrypt\",\"kms:ReEncrypt*\",\"kms:GenerateDataKey*\",\"kms:DescribeKey\"],\"Resource\":\"*\"},{\"Sid\":\"Allowattachmentofpersistentresources\",\"Effect\":\"Allow\",\"Principal\":{\"AWS\":\"arn:aws:iam::111122223333:role/ExamplePowerUserRole\"},\"Action\":[\"kms:CreateGrant\",\"kms:ListGrants\",\"kms:RevokeGrant\"],\"Resource\":\"*\",\"Condition\":{\"Bool\":{\"kms:GrantIsForAWSResource\":\"true\"}}}]}", # The key policy document.
  policy_name: "default", # The name of the key policy.
})

Request syntax with placeholder values


resp = client.put_key_policy({
  key_id: "KeyIdType", # required
  policy_name: "PolicyNameType", # required
  policy: "PolicyType", # required
  bypass_policy_lockout_safety_check: false,
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Sets the key policy on the specified KMS key.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :policy_name (required, String)

    The name of the key policy. The only valid value is default.

  • :policy (required, String)

    The key policy to attach to the KMS key.

    The key policy must meet the following criteria:

    • If you don't set BypassPolicyLockoutSafetyCheck to true, the key policy must allow the principal that is making the PutKeyPolicy request to make a subsequent PutKeyPolicy request on the KMS key. This reduces the risk that the KMS key becomes unmanageable. For more information, refer to the scenario in the Default Key Policy section of the Key Management Service Developer Guide.

    • Each statement in the key policy must contain one or more principals. The principals in the key policy must exist and be visible to KMS. When you create a new Amazon Web Services principal (for example, an IAM user or role), you might need to enforce a delay before including the new principal in a key policy because the new principal might not be immediately visible to KMS. For more information, see Changes that I make are not always immediately visible in the Amazon Web Services Identity and Access Management User Guide.

    The key policy cannot exceed 32 kilobytes (32768 bytes). For more information, see Resource Quotas in the Key Management Service Developer Guide.

  • :bypass_policy_lockout_safety_check (Boolean)

    A flag to indicate whether to bypass the key policy lockout safety check.

    Setting this value to true increases the risk that the KMS key becomes unmanageable. Do not set this value to true indiscriminately.

    For more information, refer to the scenario in the Default Key Policy section in the Key Management Service Developer Guide.

    Use this parameter only when you intend to prevent the principal that is making the request from making a subsequent PutKeyPolicy request on the KMS key.

    The default value is false.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 5517

def put_key_policy(params = {}, options = {})
  req = build_request(:put_key_policy, params)
  req.send_request(options)
end

#re_encrypt(params = {}) ⇒ Types::ReEncryptResponse

Decrypts ciphertext and then reencrypts it entirely within KMS. You can use this operation to change the KMS key under which data is encrypted, such as when you manually rotate a KMS key or change the KMS key that protects a ciphertext. You can also use it to reencrypt ciphertext under the same KMS key, such as to change the encryption context of a ciphertext.

The ReEncrypt operation can decrypt ciphertext that was encrypted by using an KMS KMS key in an KMS operation, such as Encrypt or GenerateDataKey. It can also decrypt ciphertext that was encrypted by using the public key of an asymmetric KMS key outside of KMS. However, it cannot decrypt ciphertext produced by other libraries, such as the Amazon Web Services Encryption SDK or Amazon S3 client-side encryption. These libraries return a ciphertext format that is incompatible with KMS.

When you use the ReEncrypt operation, you need to provide information for the decrypt operation and the subsequent encrypt operation.

  • If your ciphertext was encrypted under an asymmetric KMS key, you must use the SourceKeyId parameter to identify the KMS key that encrypted the ciphertext. You must also supply the encryption algorithm that was used. This information is required to decrypt the data.

  • If your ciphertext was encrypted under a symmetric KMS key, the SourceKeyId parameter is optional. KMS can get this information from metadata that it adds to the symmetric ciphertext blob. This feature adds durability to your implementation by ensuring that authorized users can decrypt ciphertext decades after it was encrypted, even if they've lost track of the key ID. However, specifying the source KMS key is always recommended as a best practice. When you use the SourceKeyId parameter to specify a KMS key, KMS uses only the KMS key you specify. If the ciphertext was encrypted under a different KMS key, the ReEncrypt operation fails. This practice ensures that you use the KMS key that you intend.

  • To reencrypt the data, you must use the DestinationKeyId parameter specify the KMS key that re-encrypts the data after it is decrypted. You can select a symmetric or asymmetric KMS key. If the destination KMS key is an asymmetric KMS key, you must also provide the encryption algorithm. The algorithm that you choose must be compatible with the KMS key.

    When you use an asymmetric KMS key to encrypt or reencrypt data, be sure to record the KMS key and encryption algorithm that you choose. You will be required to provide the same KMS key and encryption algorithm when you decrypt the data. If the KMS key and algorithm do not match the values used to encrypt the data, the decrypt operation fails.

    You are not required to supply the key ID and encryption algorithm when you decrypt with symmetric KMS keys because KMS stores this information in the ciphertext blob. KMS cannot store metadata in ciphertext generated with asymmetric keys. The standard format for asymmetric key ciphertext does not include configurable fields.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: Yes. The source KMS key and destination KMS key can be in different Amazon Web Services accounts. Either or both KMS keys can be in a different account than the caller. To specify a KMS key in a different account, you must use its key ARN or alias ARN.

Required permissions:

To permit reencryption from or to a KMS key, include the "kms:ReEncrypt*" permission in your key policy. This permission is automatically included in the key policy when you use the console to create a KMS key. But you must include it manually when you create a KMS key programmatically or when you use the PutKeyPolicy operation to set a key policy.

Related operations:

  • Decrypt

  • Encrypt

  • GenerateDataKey

  • GenerateDataKeyPair

Examples:

Example: To reencrypt data


# The following example reencrypts data with the specified KMS key.

resp = client.re_encrypt({
  ciphertext_blob: "<binary data>", # The data to reencrypt.
  destination_key_id: "0987dcba-09fe-87dc-65ba-ab0987654321", # The identifier of the KMS key to use to reencrypt the data. You can use any valid key identifier.
})

resp.to_h outputs the following:
{
  ciphertext_blob: "<binary data>", # The reencrypted data.
  key_id: "arn:aws:kms:us-east-2:111122223333:key/0987dcba-09fe-87dc-65ba-ab0987654321", # The ARN of the KMS key that was used to reencrypt the data.
  source_key_id: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The ARN of the KMS key that was originally used to encrypt the data.
}

Request syntax with placeholder values


resp = client.re_encrypt({
  ciphertext_blob: "data", # required
  source_encryption_context: {
    "EncryptionContextKey" => "EncryptionContextValue",
  },
  source_key_id: "KeyIdType",
  destination_key_id: "KeyIdType", # required
  destination_encryption_context: {
    "EncryptionContextKey" => "EncryptionContextValue",
  },
  source_encryption_algorithm: "SYMMETRIC_DEFAULT", # accepts SYMMETRIC_DEFAULT, RSAES_OAEP_SHA_1, RSAES_OAEP_SHA_256
  destination_encryption_algorithm: "SYMMETRIC_DEFAULT", # accepts SYMMETRIC_DEFAULT, RSAES_OAEP_SHA_1, RSAES_OAEP_SHA_256
  grant_tokens: ["GrantTokenType"],
})

Response structure


resp.ciphertext_blob #=> String
resp.source_key_id #=> String
resp.key_id #=> String
resp.source_encryption_algorithm #=> String, one of "SYMMETRIC_DEFAULT", "RSAES_OAEP_SHA_1", "RSAES_OAEP_SHA_256"
resp.destination_encryption_algorithm #=> String, one of "SYMMETRIC_DEFAULT", "RSAES_OAEP_SHA_1", "RSAES_OAEP_SHA_256"

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :ciphertext_blob (required, String, StringIO, File)

    Ciphertext of the data to reencrypt.

  • :source_encryption_context (Hash<String,String>)

    Specifies the encryption context to use to decrypt the ciphertext. Enter the same encryption context that was used to encrypt the ciphertext.

    An encryption context is a collection of non-secret key-value pairs that represents additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is optional when encrypting with a symmetric KMS key, but it is highly recommended.

    For more information, see Encryption Context in the Key Management Service Developer Guide.

  • :source_key_id (String)

    Specifies the KMS key that KMS will use to decrypt the ciphertext before it is re-encrypted. Enter a key ID of the KMS key that was used to encrypt the ciphertext.

    This parameter is required only when the ciphertext was encrypted under an asymmetric KMS key. If you used a symmetric KMS key, KMS can get the KMS key from metadata that it adds to the symmetric ciphertext blob. However, it is always recommended as a best practice. This practice ensures that you use the KMS key that you intend.

    To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    • Alias name: alias/ExampleAlias

    • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.

  • :destination_key_id (required, String)

    A unique identifier for the KMS key that is used to reencrypt the data. Specify a symmetric or asymmetric KMS key with a KeyUsage value of ENCRYPT_DECRYPT. To find the KeyUsage value of a KMS key, use the DescribeKey operation.

    To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    • Alias name: alias/ExampleAlias

    • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.

  • :destination_encryption_context (Hash<String,String>)

    Specifies that encryption context to use when the reencrypting the data.

    A destination encryption context is valid only when the destination KMS key is a symmetric KMS key. The standard ciphertext format for asymmetric KMS keys does not include fields for metadata.

    An encryption context is a collection of non-secret key-value pairs that represents additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is optional when encrypting with a symmetric KMS key, but it is highly recommended.

    For more information, see Encryption Context in the Key Management Service Developer Guide.

  • :source_encryption_algorithm (String)

    Specifies the encryption algorithm that KMS will use to decrypt the ciphertext before it is reencrypted. The default value, SYMMETRIC_DEFAULT, represents the algorithm used for symmetric KMS keys.

    Specify the same algorithm that was used to encrypt the ciphertext. If you specify a different algorithm, the decrypt attempt fails.

    This parameter is required only when the ciphertext was encrypted under an asymmetric KMS key.

  • :destination_encryption_algorithm (String)

    Specifies the encryption algorithm that KMS will use to reecrypt the data after it has decrypted it. The default value, SYMMETRIC_DEFAULT, represents the encryption algorithm used for symmetric KMS keys.

    This parameter is required only when the destination KMS key is an asymmetric KMS key.

  • :grant_tokens (Array<String>)

    A list of grant tokens.

    Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 5812

def re_encrypt(params = {}, options = {})
  req = build_request(:re_encrypt, params)
  req.send_request(options)
end

#replicate_key(params = {}) ⇒ Types::ReplicateKeyResponse

Replicates a multi-Region key into the specified Region. This operation creates a multi-Region replica key based on a multi-Region primary key in a different Region of the same Amazon Web Services partition. You can create multiple replicas of a primary key, but each must be in a different Region. To create a multi-Region primary key, use the CreateKey operation.

This operation supports multi-Region keys, an KMS feature that lets you create multiple interoperable KMS keys in different Amazon Web Services Regions. Because these KMS keys have the same key ID, key material, and other metadata, you can use them interchangeably to encrypt data in one Amazon Web Services Region and decrypt it in a different Amazon Web Services Region without re-encrypting the data or making a cross-Region call. For more information about multi-Region keys, see Using multi-Region keys in the Key Management Service Developer Guide.

A replica key is a fully-functional KMS key that can be used independently of its primary and peer replica keys. A primary key and its replica keys share properties that make them interoperable. They have the same key ID and key material. They also have the same key spec, key usage, key material origin, and automatic key rotation status. KMS automatically synchronizes these shared properties among related multi-Region keys. All other properties of a replica key can differ, including its key policy, tags, aliases, and key state. KMS pricing and quotas for KMS keys apply to each primary key and replica key.

When this operation completes, the new replica key has a transient key state of Creating. This key state changes to Enabled (or PendingImport) after a few seconds when the process of creating the new replica key is complete. While the key state is Creating, you can manage key, but you cannot yet use it in cryptographic operations. If you are creating and using the replica key programmatically, retry on KMSInvalidStateException or call DescribeKey to check its KeyState value before using it. For details about the Creating key state, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

The CloudTrail log of a ReplicateKey operation records a ReplicateKey operation in the primary key's Region and a CreateKey operation in the replica key's Region.

If you replicate a multi-Region primary key with imported key material, the replica key is created with no key material. You must import the same key material that you imported into the primary key. For details, see Importing key material into multi-Region keys in the Key Management Service Developer Guide.

To convert a replica key to a primary key, use the UpdatePrimaryRegion operation.

ReplicateKey uses different default values for the KeyPolicy and Tags parameters than those used in the KMS console. For details, see the parameter descriptions.

Cross-account use: No. You cannot use this operation to create a replica key in a different Amazon Web Services account.

Required permissions:

  • kms:ReplicateKey on the primary key (in the primary key's Region). Include this permission in the primary key's key policy.

  • kms:CreateKey in an IAM policy in the replica Region.

  • To use the Tags parameter, kms:TagResource in an IAM policy in the replica Region.

Related operations

  • CreateKey

  • UpdatePrimaryRegion

Examples:

Example: To replicate a multi-Region key in a different AWS Region


# This example creates a multi-Region replica key in us-west-2 of a multi-Region primary key in us-east-1. 

resp = client.replicate_key({
  key_id: "arn:aws:kms:us-east-1:111122223333:key/mrk-1234abcd12ab34cd56ef1234567890ab", # The key ID or key ARN of the multi-Region primary key
  replica_region: "us-west-2", # The Region of the new replica.
})

resp.to_h outputs the following:
{
  replica_key_metadata: {
    aws_account_id: "111122223333", 
    arn: "arn:aws:kms:us-west-2:111122223333:key/mrk-1234abcd12ab34cd56ef1234567890ab", 
    creation_date: Time.parse(1607472987.918), 
    customer_master_key_spec: "SYMMETRIC_DEFAULT", 
    description: "", 
    enabled: true, 
    encryption_algorithms: [
      "SYMMETRIC_DEFAULT", 
    ], 
    key_id: "mrk-1234abcd12ab34cd56ef1234567890ab", 
    key_manager: "CUSTOMER", 
    key_state: "Enabled", 
    key_usage: "ENCRYPT_DECRYPT", 
    multi_region: true, 
    multi_region_configuration: {
      multi_region_key_type: "REPLICA", 
      primary_key: {
        arn: "arn:aws:kms:us-east-1:111122223333:key/mrk-1234abcd12ab34cd56ef1234567890ab", 
        region: "us-east-1", 
      }, 
      replica_keys: [
        {
          arn: "arn:aws:kms:us-west-2:111122223333:key/mrk-1234abcd12ab34cd56ef1234567890ab", 
          region: "us-west-2", 
        }, 
      ], 
    }, 
    origin: "AWS_KMS", 
  }, # An object that displays detailed information about the replica key.
  replica_policy: "{\n  \"Version\" : \"2012-10-17\",\n  \"Id\" : \"key-default-1\",...}", # The key policy of the replica key. If you don't specify a key policy, the replica key gets the default key policy for a KMS key.
  replica_tags: [
  ], # The tags on the replica key, if any.
}

Request syntax with placeholder values


resp = client.replicate_key({
  key_id: "KeyIdType", # required
  replica_region: "RegionType", # required
  policy: "PolicyType",
  bypass_policy_lockout_safety_check: false,
  description: "DescriptionType",
  tags: [
    {
      tag_key: "TagKeyType", # required
      tag_value: "TagValueType", # required
    },
  ],
})

Response structure


resp.. #=> String
resp..key_id #=> String
resp..arn #=> String
resp..creation_date #=> Time
resp..enabled #=> Boolean
resp..description #=> String
resp..key_usage #=> String, one of "SIGN_VERIFY", "ENCRYPT_DECRYPT"
resp..key_state #=> String, one of "Creating", "Enabled", "Disabled", "PendingDeletion", "PendingImport", "PendingReplicaDeletion", "Unavailable", "Updating"
resp..deletion_date #=> Time
resp..valid_to #=> Time
resp..origin #=> String, one of "AWS_KMS", "EXTERNAL", "AWS_CLOUDHSM"
resp..custom_key_store_id #=> String
resp..cloud_hsm_cluster_id #=> String
resp..expiration_model #=> String, one of "KEY_MATERIAL_EXPIRES", "KEY_MATERIAL_DOES_NOT_EXPIRE"
resp..key_manager #=> String, one of "AWS", "CUSTOMER"
resp..customer_master_key_spec #=> String, one of "RSA_2048", "RSA_3072", "RSA_4096", "ECC_NIST_P256", "ECC_NIST_P384", "ECC_NIST_P521", "ECC_SECG_P256K1", "SYMMETRIC_DEFAULT"
resp..key_spec #=> String, one of "RSA_2048", "RSA_3072", "RSA_4096", "ECC_NIST_P256", "ECC_NIST_P384", "ECC_NIST_P521", "ECC_SECG_P256K1", "SYMMETRIC_DEFAULT"
resp..encryption_algorithms #=> Array
resp..encryption_algorithms[0] #=> String, one of "SYMMETRIC_DEFAULT", "RSAES_OAEP_SHA_1", "RSAES_OAEP_SHA_256"
resp..signing_algorithms #=> Array
resp..signing_algorithms[0] #=> String, one of "RSASSA_PSS_SHA_256", "RSASSA_PSS_SHA_384", "RSASSA_PSS_SHA_512", "RSASSA_PKCS1_V1_5_SHA_256", "RSASSA_PKCS1_V1_5_SHA_384", "RSASSA_PKCS1_V1_5_SHA_512", "ECDSA_SHA_256", "ECDSA_SHA_384", "ECDSA_SHA_512"
resp..multi_region #=> Boolean
resp..multi_region_configuration.multi_region_key_type #=> String, one of "PRIMARY", "REPLICA"
resp..multi_region_configuration.primary_key.arn #=> String
resp..multi_region_configuration.primary_key.region #=> String
resp..multi_region_configuration.replica_keys #=> Array
resp..multi_region_configuration.replica_keys[0].arn #=> String
resp..multi_region_configuration.replica_keys[0].region #=> String
resp..pending_deletion_window_in_days #=> Integer
resp.replica_policy #=> String
resp.replica_tags #=> Array
resp.replica_tags[0].tag_key #=> String
resp.replica_tags[0].tag_value #=> String

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies the multi-Region primary key that is being replicated. To determine whether a KMS key is a multi-Region primary key, use the DescribeKey operation to check the value of the MultiRegionKeyType property.

    Specify the key ID or key ARN of a multi-Region primary key.

    For example:

    • Key ID: mrk-1234abcd12ab34cd56ef1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/mrk-1234abcd12ab34cd56ef1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :replica_region (required, String)

    The Region ID of the Amazon Web Services Region for this replica key.

    Enter the Region ID, such as us-east-1 or ap-southeast-2. For a list of Amazon Web Services Regions in which KMS is supported, see KMS service endpoints in the Amazon Web Services General Reference.

    The replica must be in a different Amazon Web Services Region than its primary key and other replicas of that primary key, but in the same Amazon Web Services partition. KMS must be available in the replica Region. If the Region is not enabled by default, the Amazon Web Services account must be enabled in the Region.

    For information about Amazon Web Services partitions, see Amazon Resource Names (ARNs) in the Amazon Web Services General Reference. For information about enabling and disabling Regions, see Enabling a Region and Disabling a Region in the Amazon Web Services General Reference.

  • :policy (String)

    The key policy to attach to the KMS key. This parameter is optional. If you do not provide a key policy, KMS attaches the default key policy to the KMS key.

    The key policy is not a shared property of multi-Region keys. You can specify the same key policy or a different key policy for each key in a set of related multi-Region keys. KMS does not synchronize this property.

    If you provide a key policy, it must meet the following criteria:

    • If you don't set BypassPolicyLockoutSafetyCheck to true, the key policy must give the caller kms:PutKeyPolicy permission on the replica key. This reduces the risk that the KMS key becomes unmanageable. For more information, refer to the scenario in the Default Key Policy section of the Key Management Service Developer Guide .

    • Each statement in the key policy must contain one or more principals. The principals in the key policy must exist and be visible to KMS. When you create a new Amazon Web Services principal (for example, an IAM user or role), you might need to enforce a delay before including the new principal in a key policy because the new principal might not be immediately visible to KMS. For more information, see Changes that I make are not always immediately visible in the Identity and Access Management User Guide .

    • The key policy size quota is 32 kilobytes (32768 bytes).

  • :bypass_policy_lockout_safety_check (Boolean)

    A flag to indicate whether to bypass the key policy lockout safety check.

    Setting this value to true increases the risk that the KMS key becomes unmanageable. Do not set this value to true indiscriminately.

    For more information, refer to the scenario in the Default Key Policy section in the Key Management Service Developer Guide.

    Use this parameter only when you intend to prevent the principal that is making the request from making a subsequent PutKeyPolicy request on the KMS key.

    The default value is false.

  • :description (String)

    A description of the KMS key. The default value is an empty string (no description).

    The description is not a shared property of multi-Region keys. You can specify the same description or a different description for each key in a set of related multi-Region keys. KMS does not synchronize this property.

  • :tags (Array<Types::Tag>)

    Assigns one or more tags to the replica key. Use this parameter to tag the KMS key when it is created. To tag an existing KMS key, use the TagResource operation.

    Tagging or untagging a KMS key can allow or deny permission to the KMS key. For details, see Using ABAC in KMS in the Key Management Service Developer Guide.

    To use this parameter, you must have kms:TagResource permission in an IAM policy.

    Tags are not a shared property of multi-Region keys. You can specify the same tags or different tags for each key in a set of related multi-Region keys. KMS does not synchronize this property.

    Each tag consists of a tag key and a tag value. Both the tag key and the tag value are required, but the tag value can be an empty (null) string. You cannot have more than one tag on a KMS key with the same tag key. If you specify an existing tag key with a different tag value, KMS replaces the current tag value with the specified one.

    When you add tags to an Amazon Web Services resource, Amazon Web Services generates a cost allocation report with usage and costs aggregated by tags. Tags can also be used to control access to a KMS key. For details, see Tagging Keys.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 6164

def replicate_key(params = {}, options = {})
  req = build_request(:replicate_key, params)
  req.send_request(options)
end

#retire_grant(params = {}) ⇒ Struct

Deletes a grant. Typically, you retire a grant when you no longer need its permissions. To identify the grant to retire, use a grant token, or both the grant ID and a key identifier (key ID or key ARN) of the KMS key. The CreateGrant operation returns both values.

This operation can be called by the retiring principal for a grant, by the grantee principal if the grant allows the RetireGrant operation, and by the Amazon Web Services account (root user) in which the grant is created. It can also be called by principals to whom permission for retiring a grant is delegated. For details, see Retiring and revoking grants in the Key Management Service Developer Guide.

For detailed information about grants, including grant terminology, see Using grants in the Key Management Service Developer Guide . For examples of working with grants in several programming languages, see Programming grants.

Cross-account use: Yes. You can retire a grant on a KMS key in a different Amazon Web Services account.

Required permissions::Permission to retire a grant is determined primarily by the grant. For details, see Retiring and revoking grants in the Key Management Service Developer Guide.

Related operations:

  • CreateGrant

  • ListGrants

  • ListRetirableGrants

  • RevokeGrant

Examples:

Example: To retire a grant


# The following example retires a grant.

resp = client.retire_grant({
  grant_id: "0c237476b39f8bc44e45212e08498fbe3151305030726c0590dd8d3e9f3d6a60", # The identifier of the grant to retire.
  key_id: "arn:aws:kms:us-east-2:444455556666:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The Amazon Resource Name (ARN) of the KMS key associated with the grant.
})

Request syntax with placeholder values


resp = client.retire_grant({
  grant_token: "GrantTokenType",
  key_id: "KeyIdType",
  grant_id: "GrantIdType",
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :grant_token (String)

    Identifies the grant to be retired. You can use a grant token to identify a new grant even before it has achieved eventual consistency.

    Only the CreateGrant operation returns a grant token. For details, see Grant token and Eventual consistency in the Key Management Service Developer Guide.

  • :key_id (String)

    The key ARN KMS key associated with the grant. To find the key ARN, use the ListKeys operation.

    For example: arn:aws:kms:us-east-2:444455556666:key/1234abcd-12ab-34cd-56ef-1234567890ab

  • :grant_id (String)

    Identifies the grant to retire. To get the grant ID, use CreateGrant, ListGrants, or ListRetirableGrants.

    • Grant ID Example - 0123456789012345678901234567890123456789012345678901234567890123

    ^

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 6264

def retire_grant(params = {}, options = {})
  req = build_request(:retire_grant, params)
  req.send_request(options)
end

#revoke_grant(params = {}) ⇒ Struct

Deletes the specified grant. You revoke a grant to terminate the permissions that the grant allows. For more information, see Retiring and revoking grants in the Key Management Service Developer Guide .

When you create, retire, or revoke a grant, there might be a brief delay, usually less than five minutes, until the grant is available throughout KMS. This state is known as eventual consistency. For details, see Eventual consistency in the Key Management Service Developer Guide .

For detailed information about grants, including grant terminology, see Using grants in the Key Management Service Developer Guide . For examples of working with grants in several programming languages, see Programming grants.

Cross-account use: Yes. To perform this operation on a KMS key in a different Amazon Web Services account, specify the key ARN in the value of the KeyId parameter.

Required permissions: kms:RevokeGrant (key policy).

Related operations:

  • CreateGrant

  • ListGrants

  • ListRetirableGrants

  • RetireGrant

Examples:

Example: To revoke a grant


# The following example revokes a grant.

resp = client.revoke_grant({
  grant_id: "0c237476b39f8bc44e45212e08498fbe3151305030726c0590dd8d3e9f3d6a60", # The identifier of the grant to revoke.
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key associated with the grant. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

Request syntax with placeholder values


resp = client.revoke_grant({
  key_id: "KeyIdType", # required
  grant_id: "GrantIdType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    A unique identifier for the KMS key associated with the grant. To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

    Specify the key ID or key ARN of the KMS key. To specify a KMS key in a different Amazon Web Services account, you must use the key ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :grant_id (required, String)

    Identifies the grant to revoke. To get the grant ID, use CreateGrant, ListGrants, or ListRetirableGrants.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 6353

def revoke_grant(params = {}, options = {})
  req = build_request(:revoke_grant, params)
  req.send_request(options)
end

#schedule_key_deletion(params = {}) ⇒ Types::ScheduleKeyDeletionResponse

Schedules the deletion of a KMS key. By default, KMS applies a waiting period of 30 days, but you can specify a waiting period of 7-30 days. When this operation is successful, the key state of the KMS key changes to PendingDeletion and the key can't be used in any cryptographic operations. It remains in this state for the duration of the waiting period. Before the waiting period ends, you can use CancelKeyDeletion to cancel the deletion of the KMS key. After the waiting period ends, KMS deletes the KMS key, its key material, and all KMS data associated with it, including all aliases that refer to it.

Deleting a KMS key is a destructive and potentially dangerous operation. When a KMS key is deleted, all data that was encrypted under the KMS key is unrecoverable. (The only exception is a multi-Region replica key.) To prevent the use of a KMS key without deleting it, use DisableKey.

If you schedule deletion of a KMS key from a custom key store, when the waiting period expires, ScheduleKeyDeletion deletes the KMS key from KMS. Then KMS makes a best effort to delete the key material from the associated CloudHSM cluster. However, you might need to manually delete the orphaned key material from the cluster and its backups.

You can schedule the deletion of a multi-Region primary key and its replica keys at any time. However, KMS will not delete a multi-Region primary key with existing replica keys. If you schedule the deletion of a primary key with replicas, its key state changes to PendingReplicaDeletion and it cannot be replicated or used in cryptographic operations. This status can continue indefinitely. When the last of its replicas keys is deleted (not just scheduled), the key state of the primary key changes to PendingDeletion and its waiting period (PendingWindowInDays) begins. For details, see Deleting multi-Region keys in the Key Management Service Developer Guide.

For more information about scheduling a KMS key for deletion, see Deleting KMS keys in the Key Management Service Developer Guide.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:ScheduleKeyDeletion (key policy)

Related operations

  • CancelKeyDeletion

  • DisableKey

Examples:

Example: To schedule a KMS key for deletion


# The following example schedules the specified KMS key for deletion.

resp = client.schedule_key_deletion({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key to schedule for deletion. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
  pending_window_in_days: 7, # The waiting period, specified in number of days. After the waiting period ends, KMS deletes the KMS key.
})

resp.to_h outputs the following:
{
  deletion_date: Time.parse("2016-12-17T16:00:00-08:00"), # The date and time after which KMS deletes the KMS key.
  key_id: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The ARN of the KMS key that is scheduled for deletion.
}

Request syntax with placeholder values


resp = client.schedule_key_deletion({
  key_id: "KeyIdType", # required
  pending_window_in_days: 1,
})

Response structure


resp.key_id #=> String
resp.deletion_date #=> Time
resp.key_state #=> String, one of "Creating", "Enabled", "Disabled", "PendingDeletion", "PendingImport", "PendingReplicaDeletion", "Unavailable", "Updating"
resp.pending_window_in_days #=> Integer

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    The unique identifier of the KMS key to delete.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :pending_window_in_days (Integer)

    The waiting period, specified in number of days. After the waiting period ends, KMS deletes the KMS key.

    If the KMS key is a multi-Region primary key with replicas, the waiting period begins when the last of its replica keys is deleted. Otherwise, the waiting period begins immediately.

    This value is optional. If you include a value, it must be between 7 and 30, inclusive. If you do not include a value, it defaults to 30.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 6487

def schedule_key_deletion(params = {}, options = {})
  req = build_request(:schedule_key_deletion, params)
  req.send_request(options)
end

#sign(params = {}) ⇒ Types::SignResponse

Creates a digital signature for a message or message digest by using the private key in an asymmetric KMS key. To verify the signature, use the Verify operation, or use the public key in the same asymmetric KMS key outside of KMS. For information about symmetric and asymmetric KMS keys, see Using Symmetric and Asymmetric KMS keys in the Key Management Service Developer Guide.

Digital signatures are generated and verified by using asymmetric key pair, such as an RSA or ECC pair that is represented by an asymmetric KMS key. The key owner (or an authorized user) uses their private key to sign a message. Anyone with the public key can verify that the message was signed with that particular private key and that the message hasn't changed since it was signed.

To use the Sign operation, provide the following information:

  • Use the KeyId parameter to identify an asymmetric KMS key with a KeyUsage value of SIGN_VERIFY. To get the KeyUsage value of a KMS key, use the DescribeKey operation. The caller must have kms:Sign permission on the KMS key.

  • Use the Message parameter to specify the message or message digest to sign. You can submit messages of up to 4096 bytes. To sign a larger message, generate a hash digest of the message, and then provide the hash digest in the Message parameter. To indicate whether the message is a full message or a digest, use the MessageType parameter.

  • Choose a signing algorithm that is compatible with the KMS key.

When signing a message, be sure to record the KMS key and the signing algorithm. This information is required to verify the signature.

To verify the signature that this operation generates, use the Verify operation. Or use the GetPublicKey operation to download the public key and then use the public key to verify the signature outside of KMS.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.

Required permissions: kms:Sign (key policy)

Related operations: Verify

Examples:

Example: To digitally sign a message with an asymmetric KMS key.


# This operation uses the private key in an asymmetric elliptic curve (ECC) KMS key to generate a digital signature for a
# given message.

resp = client.sign({
  key_id: "alias/ECC_signing_key", # The asymmetric KMS key to be used to generate the digital signature. This example uses an alias of the KMS key.
  message: "<message to be signed>", # Message to be signed. Use Base-64 for the CLI.
  message_type: "RAW", # Indicates whether the message is RAW or a DIGEST.
  signing_algorithm: "ECDSA_SHA_384", # The requested signing algorithm. This must be an algorithm that the KMS key supports.
})

resp.to_h outputs the following:
{
  key_id: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The key ARN of the asymmetric KMS key that was used to sign the message.
  signature: "<binary data>", # The digital signature of the message.
  signing_algorithm: "ECDSA_SHA_384", # The actual signing algorithm that was used to generate the signature.
}

Request syntax with placeholder values


resp = client.sign({
  key_id: "KeyIdType", # required
  message: "data", # required
  message_type: "RAW", # accepts RAW, DIGEST
  grant_tokens: ["GrantTokenType"],
  signing_algorithm: "RSASSA_PSS_SHA_256", # required, accepts RSASSA_PSS_SHA_256, RSASSA_PSS_SHA_384, RSASSA_PSS_SHA_512, RSASSA_PKCS1_V1_5_SHA_256, RSASSA_PKCS1_V1_5_SHA_384, RSASSA_PKCS1_V1_5_SHA_512, ECDSA_SHA_256, ECDSA_SHA_384, ECDSA_SHA_512
})

Response structure


resp.key_id #=> String
resp.signature #=> String
resp.signing_algorithm #=> String, one of "RSASSA_PSS_SHA_256", "RSASSA_PSS_SHA_384", "RSASSA_PSS_SHA_512", "RSASSA_PKCS1_V1_5_SHA_256", "RSASSA_PKCS1_V1_5_SHA_384", "RSASSA_PKCS1_V1_5_SHA_512", "ECDSA_SHA_256", "ECDSA_SHA_384", "ECDSA_SHA_512"

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies an asymmetric KMS key. KMS uses the private key in the asymmetric KMS key to sign the message. The KeyUsage type of the KMS key must be SIGN_VERIFY. To find the KeyUsage of a KMS key, use the DescribeKey operation.

    To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    • Alias name: alias/ExampleAlias

    • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.

  • :message (required, String, StringIO, File)

    Specifies the message or message digest to sign. Messages can be 0-4096 bytes. To sign a larger message, provide the message digest.

    If you provide a message, KMS generates a hash digest of the message and then signs it.

  • :message_type (String)

    Tells KMS whether the value of the Message parameter is a message or message digest. The default value, RAW, indicates a message. To indicate a message digest, enter DIGEST.

  • :grant_tokens (Array<String>)

    A list of grant tokens.

    Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.

  • :signing_algorithm (required, String)

    Specifies the signing algorithm to use when signing the message.

    Choose an algorithm that is compatible with the type and size of the specified asymmetric KMS key.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 6651

def sign(params = {}, options = {})
  req = build_request(:sign, params)
  req.send_request(options)
end

#tag_resource(params = {}) ⇒ Struct

Adds or edits tags on a customer managed key.

Tagging or untagging a KMS key can allow or deny permission to the KMS key. For details, see Using ABAC in KMS in the Key Management Service Developer Guide.

Each tag consists of a tag key and a tag value, both of which are case-sensitive strings. The tag value can be an empty (null) string. To add a tag, specify a new tag key and a tag value. To edit a tag, specify an existing tag key and a new tag value.

You can use this operation to tag a customer managed key, but you cannot tag an Amazon Web Services managed key, an Amazon Web Services owned key, a custom key store, or an alias.

You can also add tags to a KMS key while creating it (CreateKey) or replicating it (ReplicateKey).

For information about using tags in KMS, see Tagging keys. For general information about tags, including the format and syntax, see Tagging Amazon Web Services resources in the Amazon Web Services General Reference.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:TagResource (key policy)

Related operations

  • CreateKey

  • ListResourceTags

  • ReplicateKey

  • UntagResource

Examples:

Example: To tag a KMS key


# The following example tags a KMS key.

resp = client.tag_resource({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key you are tagging. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
  tags: [
    {
      tag_key: "Purpose", 
      tag_value: "Test", 
    }, 
  ], # A list of tags.
})

Request syntax with placeholder values


resp = client.tag_resource({
  key_id: "KeyIdType", # required
  tags: [ # required
    {
      tag_key: "TagKeyType", # required
      tag_value: "TagValueType", # required
    },
  ],
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies a customer managed key in the account and Region.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :tags (required, Array<Types::Tag>)

    One or more tags.

    Each tag consists of a tag key and a tag value. The tag value can be an empty (null) string.

    You cannot have more than one tag on a KMS key with the same tag key. If you specify an existing tag key with a different tag value, KMS replaces the current tag value with the specified one.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 6771

def tag_resource(params = {}, options = {})
  req = build_request(:tag_resource, params)
  req.send_request(options)
end

#untag_resource(params = {}) ⇒ Struct

Deletes tags from a customer managed key. To delete a tag, specify the tag key and the KMS key.

Tagging or untagging a KMS key can allow or deny permission to the KMS key. For details, see Using ABAC in KMS in the Key Management Service Developer Guide.

When it succeeds, the UntagResource operation doesn't return any output. Also, if the specified tag key isn't found on the KMS key, it doesn't throw an exception or return a response. To confirm that the operation worked, use the ListResourceTags operation.

For information about using tags in KMS, see Tagging keys. For general information about tags, including the format and syntax, see Tagging Amazon Web Services resources in the Amazon Web Services General Reference.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:UntagResource (key policy)

Related operations

  • CreateKey

  • ListResourceTags

  • ReplicateKey

  • TagResource

Examples:

Example: To remove tags from a KMS key


# The following example removes tags from a KMS key.

resp = client.untag_resource({
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key whose tags you are removing.
  tag_keys: [
    "Purpose", 
    "CostCenter", 
  ], # A list of tag keys. Provide only the tag keys, not the tag values.
})

Request syntax with placeholder values


resp = client.untag_resource({
  key_id: "KeyIdType", # required
  tag_keys: ["TagKeyType"], # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies the KMS key from which you are removing tags.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :tag_keys (required, Array<String>)

    One or more tag keys. Specify only the tag keys, not the tag values.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 6867

def untag_resource(params = {}, options = {})
  req = build_request(:untag_resource, params)
  req.send_request(options)
end

#update_alias(params = {}) ⇒ Struct

Associates an existing KMS alias with a different KMS key. Each alias is associated with only one KMS key at a time, although a KMS key can have multiple aliases. The alias and the KMS key must be in the same Amazon Web Services account and Region.

Adding, deleting, or updating an alias can allow or deny permission to the KMS key. For details, see Using ABAC in KMS in the Key Management Service Developer Guide.

The current and new KMS key must be the same type (both symmetric or both asymmetric), and they must have the same key usage (ENCRYPT_DECRYPT or SIGN_VERIFY). This restriction prevents errors in code that uses aliases. If you must assign an alias to a different type of KMS key, use DeleteAlias to delete the old alias and CreateAlias to create a new alias.

You cannot use UpdateAlias to change an alias name. To change an alias name, use DeleteAlias to delete the old alias and CreateAlias to create a new alias.

Because an alias is not a property of a KMS key, you can create, update, and delete the aliases of a KMS key without affecting the KMS key. Also, aliases do not appear in the response from the DescribeKey operation. To get the aliases of all KMS keys in the account, use the ListAliases operation.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions

For details, see Controlling access to aliases in the Key Management Service Developer Guide.

Related operations:

  • CreateAlias

  • DeleteAlias

  • ListAliases

Examples:

Example: To update an alias


# The following example updates the specified alias to refer to the specified KMS key.

resp = client.update_alias({
  alias_name: "alias/ExampleAlias", # The alias to update.
  target_key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key that the alias will refer to after this operation succeeds. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

Request syntax with placeholder values


resp = client.update_alias({
  alias_name: "AliasNameType", # required
  target_key_id: "KeyIdType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :alias_name (required, String)

    Identifies the alias that is changing its KMS key. This value must begin with alias/ followed by the alias name, such as alias/ExampleAlias. You cannot use UpdateAlias to change the alias name.

  • :target_key_id (required, String)

    Identifies the customer managed key to associate with the alias. You don't have permission to associate an alias with an Amazon Web Services managed key.

    The KMS key must be in the same Amazon Web Services account and Region as the alias. Also, the new target KMS key must be the same type as the current target KMS key (both symmetric or both asymmetric) and they must have the same key usage.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

    To verify that the alias is mapped to the correct KMS key, use ListAliases.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 6992

def update_alias(params = {}, options = {})
  req = build_request(:update_alias, params)
  req.send_request(options)
end

#update_custom_key_store(params = {}) ⇒ Struct

Changes the properties of a custom key store. Use the CustomKeyStoreId parameter to identify the custom key store you want to edit. Use the remaining parameters to change the properties of the custom key store.

You can only update a custom key store that is disconnected. To disconnect the custom key store, use DisconnectCustomKeyStore. To reconnect the custom key store after the update completes, use ConnectCustomKeyStore. To find the connection state of a custom key store, use the DescribeCustomKeyStores operation.

The CustomKeyStoreId parameter is required in all commands. Use the other parameters of UpdateCustomKeyStore to edit your key store settings.

  • Use the NewCustomKeyStoreName parameter to change the friendly name of the custom key store to the value that you specify.

  • Use the KeyStorePassword parameter tell KMS the current password of the kmsuser crypto user (CU) in the associated CloudHSM cluster. You can use this parameter to fix connection failures that occur when KMS cannot log into the associated cluster because the kmsuser password has changed. This value does not change the password in the CloudHSM cluster.

  • Use the CloudHsmClusterId parameter to associate the custom key store with a different, but related, CloudHSM cluster. You can use this parameter to repair a custom key store if its CloudHSM cluster becomes corrupted or is deleted, or when you need to create or restore a cluster from a backup.

If the operation succeeds, it returns a JSON object with no properties.

This operation is part of the Custom Key Store feature feature in KMS, which combines the convenience and extensive integration of KMS with the isolation and control of a single-tenant key store.

Cross-account use: No. You cannot perform this operation on a custom key store in a different Amazon Web Services account.

Required permissions: kms:UpdateCustomKeyStore (IAM policy)

Related operations:

  • ConnectCustomKeyStore

  • CreateCustomKeyStore

  • DeleteCustomKeyStore

  • DescribeCustomKeyStores

  • DisconnectCustomKeyStore

Examples:

Example: To edit the password of a custom key store


# This example tells KMS the password for the kmsuser crypto user in the AWS CloudHSM cluster that is associated with the
# AWS KMS custom key store. (It does not change the password in the CloudHSM cluster.) This operation does not return any
# data.

resp = client.update_custom_key_store({
  custom_key_store_id: "cks-1234567890abcdef0", # The ID of the custom key store that you are updating.
  key_store_password: "ExamplePassword", # The password for the kmsuser crypto user in the CloudHSM cluster.
})

resp.to_h outputs the following:
{
}

Example: To edit the friendly name of a custom key store


# This example changes the friendly name of the AWS KMS custom key store to the name that you specify. This operation does
# not return any data. To verify that the operation worked, use the DescribeCustomKeyStores operation.

resp = client.update_custom_key_store({
  custom_key_store_id: "cks-1234567890abcdef0", # The ID of the custom key store that you are updating.
  new_custom_key_store_name: "DevelopmentKeys", # A new friendly name for the custom key store.
})

resp.to_h outputs the following:
{
}

Example: To associate the custom key store with a different, but related, AWS CloudHSM cluster.


# This example changes the cluster that is associated with a custom key store to a related cluster, such as a different
# backup of the same cluster. This operation does not return any data. To verify that the operation worked, use the
# DescribeCustomKeyStores operation.

resp = client.update_custom_key_store({
  cloud_hsm_cluster_id: "cluster-1a23b4cdefg", # The ID of the AWS CloudHSM cluster that you want to associate with the custom key store. This cluster must be related to the original CloudHSM cluster for this key store.
  custom_key_store_id: "cks-1234567890abcdef0", # The ID of the custom key store that you are updating.
})

resp.to_h outputs the following:
{
}

Request syntax with placeholder values


resp = client.update_custom_key_store({
  custom_key_store_id: "CustomKeyStoreIdType", # required
  new_custom_key_store_name: "CustomKeyStoreNameType",
  key_store_password: "KeyStorePasswordType",
  cloud_hsm_cluster_id: "CloudHsmClusterIdType",
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :custom_key_store_id (required, String)

    Identifies the custom key store that you want to update. Enter the ID of the custom key store. To find the ID of a custom key store, use the DescribeCustomKeyStores operation.

  • :new_custom_key_store_name (String)

    Changes the friendly name of the custom key store to the value that you specify. The custom key store name must be unique in the Amazon Web Services account.

  • :key_store_password (String)

    Enter the current password of the kmsuser crypto user (CU) in the CloudHSM cluster that is associated with the custom key store.

    This parameter tells KMS the current password of the kmsuser crypto user (CU). It does not set or change the password of any users in the CloudHSM cluster.

  • :cloud_hsm_cluster_id (String)

    Associates the custom key store with a related CloudHSM cluster.

    Enter the cluster ID of the cluster that you used to create the custom key store or a cluster that shares a backup history and has the same cluster certificate as the original cluster. You cannot use this parameter to associate a custom key store with an unrelated cluster. In addition, the replacement cluster must fulfill the requirements for a cluster associated with a custom key store. To view the cluster certificate of a cluster, use the DescribeClusters operation.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 7158

def update_custom_key_store(params = {}, options = {})
  req = build_request(:update_custom_key_store, params)
  req.send_request(options)
end

#update_key_description(params = {}) ⇒ Struct

Updates the description of a KMS key. To see the description of a KMS key, use DescribeKey.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.

Required permissions: kms:UpdateKeyDescription (key policy)

Related operations

  • CreateKey

  • DescribeKey

Examples:

Example: To update the description of a KMS key


# The following example updates the description of the specified KMS key.

resp = client.update_key_description({
  description: "Example description that indicates the intended use of this KMS key.", # The updated description.
  key_id: "1234abcd-12ab-34cd-56ef-1234567890ab", # The identifier of the KMS key whose description you are updating. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
})

Request syntax with placeholder values


resp = client.update_key_description({
  key_id: "KeyIdType", # required
  description: "DescriptionType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Updates the description of the specified KMS key.

    Specify the key ID or key ARN of the KMS key.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :description (required, String)

    New description for the KMS key.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 7227

def update_key_description(params = {}, options = {})
  req = build_request(:update_key_description, params)
  req.send_request(options)
end

#update_primary_region(params = {}) ⇒ Struct

Changes the primary key of a multi-Region key.

This operation changes the replica key in the specified Region to a primary key and changes the former primary key to a replica key. For example, suppose you have a primary key in us-east-1 and a replica key in eu-west-2. If you run UpdatePrimaryRegion with a PrimaryRegion value of eu-west-2, the primary key is now the key in eu-west-2, and the key in us-east-1 becomes a replica key. For details, see Updating the primary Region in the Key Management Service Developer Guide.

This operation supports multi-Region keys, an KMS feature that lets you create multiple interoperable KMS keys in different Amazon Web Services Regions. Because these KMS keys have the same key ID, key material, and other metadata, you can use them interchangeably to encrypt data in one Amazon Web Services Region and decrypt it in a different Amazon Web Services Region without re-encrypting the data or making a cross-Region call. For more information about multi-Region keys, see Using multi-Region keys in the Key Management Service Developer Guide.

The primary key of a multi-Region key is the source for properties that are always shared by primary and replica keys, including the key material, key ID, key spec, key usage, key material origin, and automatic key rotation. It's the only key that can be replicated. You cannot delete the primary key until all replica keys are deleted.

The key ID and primary Region that you specify uniquely identify the replica key that will become the primary key. The primary Region must already have a replica key. This operation does not create a KMS key in the specified Region. To find the replica keys, use the DescribeKey operation on the primary key or any replica key. To create a replica key, use the ReplicateKey operation.

You can run this operation while using the affected multi-Region keys in cryptographic operations. This operation should not delay, interrupt, or cause failures in cryptographic operations.

Even after this operation completes, the process of updating the primary Region might still be in progress for a few more seconds. Operations such as DescribeKey might display both the old and new primary keys as replicas. The old and new primary keys have a transient key state of Updating. The original key state is restored when the update is complete. While the key state is Updating, you can use the keys in cryptographic operations, but you cannot replicate the new primary key or perform certain management operations, such as enabling or disabling these keys. For details about the Updating key state, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

This operation does not return any output. To verify that primary key is changed, use the DescribeKey operation.

Cross-account use: No. You cannot use this operation in a different Amazon Web Services account.

Required permissions:

  • kms:UpdatePrimaryRegion on the current primary key (in the primary key's Region). Include this permission primary key's key policy.

  • kms:UpdatePrimaryRegion on the current replica key (in the replica key's Region). Include this permission in the replica key's key policy.

Related operations

  • CreateKey

  • ReplicateKey

Examples:

Request syntax with placeholder values


resp = client.update_primary_region({
  key_id: "KeyIdType", # required
  primary_region: "RegionType", # required
})

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies the current primary key. When the operation completes, this KMS key will be a replica key.

    Specify the key ID or key ARN of a multi-Region primary key.

    For example:

    • Key ID: mrk-1234abcd12ab34cd56ef1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/mrk-1234abcd12ab34cd56ef1234567890ab

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.

  • :primary_region (required, String)

    The Amazon Web Services Region of the new primary key. Enter the Region ID, such as us-east-1 or ap-southeast-2. There must be an existing replica key in this Region.

    When the operation completes, the multi-Region key in this Region will be the primary key.

Returns:

  • (Struct)

    Returns an empty response.

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 7353

def update_primary_region(params = {}, options = {})
  req = build_request(:update_primary_region, params)
  req.send_request(options)
end

#verify(params = {}) ⇒ Types::VerifyResponse

Verifies a digital signature that was generated by the Sign operation.

Verification confirms that an authorized user signed the message with the specified KMS key and signing algorithm, and the message hasn't changed since it was signed. If the signature is verified, the value of the SignatureValid field in the response is True. If the signature verification fails, the Verify operation fails with an KMSInvalidSignatureException exception.

A digital signature is generated by using the private key in an asymmetric KMS key. The signature is verified by using the public key in the same asymmetric KMS key. For information about symmetric and asymmetric KMS keys, see Using Symmetric and Asymmetric KMS keys in the Key Management Service Developer Guide.

To verify a digital signature, you can use the Verify operation. Specify the same asymmetric KMS key, message, and signing algorithm that were used to produce the signature.

You can also verify the digital signature by using the public key of the KMS key outside of KMS. Use the GetPublicKey operation to download the public key in the asymmetric KMS key and then use the public key to verify the signature outside of KMS. The advantage of using the Verify operation is that it is performed within KMS. As a result, it's easy to call, the operation is performed within the FIPS boundary, it is logged in CloudTrail, and you can use key policy and IAM policy to determine who is authorized to use the KMS key to verify signatures.

The KMS key that you use for this operation must be in a compatible key state. For details, see Key state: Effect on your KMS key in the Key Management Service Developer Guide.

Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.

Required permissions: kms:Verify (key policy)

Related operations: Sign

Examples:

Example: To use an asymmetric KMS key to verify a digital signature


# This operation uses the public key in an elliptic curve (ECC) asymmetric key to verify a digital signature within AWS
# KMS. 

resp = client.verify({
  key_id: "alias/ECC_signing_key", # The asymmetric KMS key to be used to verify the digital signature. This example uses an alias to identify the KMS key.
  message: "<message to be verified>", # The message that was signed.
  message_type: "RAW", # Indicates whether the message is RAW or a DIGEST.
  signature: "<binary data>", # The signature to be verified.
  signing_algorithm: "ECDSA_SHA_384", # The signing algorithm to be used to verify the signature.
})

resp.to_h outputs the following:
{
  key_id: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", # The key ARN of the asymmetric KMS key that was used to verify the digital signature.
  signature_valid: true, # Indicates whether the signature was verified (true) or failed verification (false).
  signing_algorithm: "ECDSA_SHA_384", # The signing algorithm that was used to verify the signature.
}

Request syntax with placeholder values


resp = client.verify({
  key_id: "KeyIdType", # required
  message: "data", # required
  message_type: "RAW", # accepts RAW, DIGEST
  signature: "data", # required
  signing_algorithm: "RSASSA_PSS_SHA_256", # required, accepts RSASSA_PSS_SHA_256, RSASSA_PSS_SHA_384, RSASSA_PSS_SHA_512, RSASSA_PKCS1_V1_5_SHA_256, RSASSA_PKCS1_V1_5_SHA_384, RSASSA_PKCS1_V1_5_SHA_512, ECDSA_SHA_256, ECDSA_SHA_384, ECDSA_SHA_512
  grant_tokens: ["GrantTokenType"],
})

Response structure


resp.key_id #=> String
resp.signature_valid #=> Boolean
resp.signing_algorithm #=> String, one of "RSASSA_PSS_SHA_256", "RSASSA_PSS_SHA_384", "RSASSA_PSS_SHA_512", "RSASSA_PKCS1_V1_5_SHA_256", "RSASSA_PKCS1_V1_5_SHA_384", "RSASSA_PKCS1_V1_5_SHA_512", "ECDSA_SHA_256", "ECDSA_SHA_384", "ECDSA_SHA_512"

Parameters:

  • params (Hash) (defaults to: {})

    ({})

Options Hash (params):

  • :key_id (required, String)

    Identifies the asymmetric KMS key that will be used to verify the signature. This must be the same KMS key that was used to generate the signature. If you specify a different KMS key, the signature verification fails.

    To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.

    For example:

    • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

    • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    • Alias name: alias/ExampleAlias

    • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

    To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.

  • :message (required, String, StringIO, File)

    Specifies the message that was signed. You can submit a raw message of up to 4096 bytes, or a hash digest of the message. If you submit a digest, use the MessageType parameter with a value of DIGEST.

    If the message specified here is different from the message that was signed, the signature verification fails. A message and its hash digest are considered to be the same message.

  • :message_type (String)

    Tells KMS whether the value of the Message parameter is a message or message digest. The default value, RAW, indicates a message. To indicate a message digest, enter DIGEST.

    Use the DIGEST value only when the value of the Message parameter is a message digest. If you use the DIGEST value with a raw message, the security of the verification operation can be compromised.

  • :signature (required, String, StringIO, File)

    The signature that the Sign operation generated.

  • :signing_algorithm (required, String)

    The signing algorithm that was used to sign the message. If you submit a different algorithm, the signature verification fails.

  • :grant_tokens (Array<String>)

    A list of grant tokens.

    Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.

Returns:

See Also:



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# File 'gems/aws-sdk-kms/lib/aws-sdk-kms/client.rb', line 7518

def verify(params = {}, options = {})
  req = build_request(:verify, params)
  req.send_request(options)
end