AWS SDK Version 3 for .NET
API Reference

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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.

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:

Note:

For .NET Core this operation is only available in asynchronous form. Please refer to CreateGrantAsync.

Namespace: Amazon.KeyManagementService
Assembly: AWSSDK.KeyManagementService.dll
Version: 3.x.y.z

Syntax

C#
public virtual CreateGrantResponse CreateGrant(
         CreateGrantRequest request
)
Parameters
request
Type: Amazon.KeyManagementService.Model.CreateGrantRequest

Container for the necessary parameters to execute the CreateGrant service method.

Return Value
The response from the CreateGrant service method, as returned by KeyManagementService.

Exceptions

ExceptionCondition
DependencyTimeoutException The system timed out while trying to fulfill the request. The request can be retried.
DisabledException The request was rejected because the specified KMS key is not enabled.
InvalidArnException The request was rejected because a specified ARN, or an ARN in a key policy, is not valid.
InvalidGrantTokenException The request was rejected because the specified grant token is not valid.
KMSInternalException The request was rejected because an internal exception occurred. The request can be retried.
KMSInvalidStateException The request was rejected because the state of the specified resource is not valid for this request. 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.
LimitExceededException The request was rejected because a quota was exceeded. For more information, see Quotas in the Key Management Service Developer Guide.
NotFoundException The request was rejected because the specified entity or resource could not be found.

Examples

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

To create a grant


var client = new AmazonKeyManagementServiceClient();
var response = client.CreateGrant(new CreateGrantRequest 
{
    GranteePrincipal = "arn:aws:iam::111122223333:role/ExampleRole", // The identity that is given permission to perform the operations specified in the grant.
    KeyId = "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 = new List<string> {
        "Encrypt",
        "Decrypt"
    } // A list of operations that the grant allows.
});

string grantId = response.GrantId; // The unique identifier of the grant.
string grantToken = response.GrantToken; // The grant token.

            

Version Information

.NET Framework:
Supported in: 4.5, 4.0, 3.5

See Also