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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
different types of KMS keys. It also displays the key usage (encryption, signing,
or generating and verifying MACs) and the 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.
In general, DescribeKey is a non-mutating operation. It returns data
about KMS keys, but doesn't change them. However, Amazon Web Services services use
DescribeKey to create Amazon
Web Services managed keys from a predefined Amazon Web Services alias with
no key ID.
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:
For .NET Core this operation is only available in asynchronous form. Please refer to DescribeKeyAsync.
Namespace: Amazon.KeyManagementService
Assembly: AWSSDK.KeyManagementService.dll
Version: 3.x.y.z
public virtual DescribeKeyResponse DescribeKey( DescribeKeyRequest request )
Container for the necessary parameters to execute the DescribeKey service method.
| Exception | Condition |
|---|---|
| DependencyTimeoutException | The system timed out while trying to fulfill the request. The request can be retried. |
| InvalidArnException | The request was rejected because a specified ARN, or an ARN in a key policy, is not valid. |
| KMSInternalException | The request was rejected because an internal exception occurred. The request can be retried. |
| NotFoundException | The request was rejected because the specified entity or resource could not be found. |
The following example gets metadata for a symmetric encryption KMS key.
var client = new AmazonKeyManagementServiceClient();
var response = client.DescribeKey(new DescribeKeyRequest
{
KeyId = "1234abcd-12ab-34cd-56ef-1234567890ab" // An identifier for the KMS key. You can use the key ID, key ARN, alias name, alias ARN of the KMS key.
});
KeyMetadata keyMetadata = response.KeyMetadata; // An object that contains information about the specified KMS key.
The following example gets metadata for an asymmetric RSA KMS key used for signing and verification.
var client = new AmazonKeyManagementServiceClient();
var response = client.DescribeKey(new DescribeKeyRequest
{
KeyId = "1234abcd-12ab-34cd-56ef-1234567890ab" // An identifier for the KMS key. You can use the key ID, key ARN, alias name, alias ARN of the KMS key.
});
KeyMetadata keyMetadata = response.KeyMetadata; // An object that contains information about the specified KMS key.
The following example gets metadata for a multi-Region replica key. This multi-Region key is a symmetric encryption key. DescribeKey returns information about the primary key and all of its replicas.
var client = new AmazonKeyManagementServiceClient();
var response = client.DescribeKey(new DescribeKeyRequest
{
KeyId = "arn:aws:kms:ap-northeast-1:111122223333:key/mrk-1234abcd12ab34cd56ef1234567890ab" // An identifier for the KMS key. You can use the key ID, key ARN, alias name, alias ARN of the KMS key.
});
KeyMetadata keyMetadata = response.KeyMetadata; // An object that contains information about the specified KMS key.
The following example gets the metadata of an HMAC KMS key.
var client = new AmazonKeyManagementServiceClient();
var response = client.DescribeKey(new DescribeKeyRequest
{
KeyId = "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab" // An identifier for the KMS key. You can use the key ID, key ARN, alias name, alias ARN of the KMS key.
});
KeyMetadata keyMetadata = response.KeyMetadata; // An object that contains information about the specified KMS key.
.NET Framework:
Supported in: 4.5, 4.0, 3.5