GetKeyPolicy - Amazon Key Management Service
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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

Eventual consistency: The Amazon KMS API follows an eventual consistency model. For more information, see Amazon KMS eventual consistency.

Request Syntax

{ "KeyId": "string", "PolicyName": "string" }

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.


In the following list, the required parameters are described first.


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.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 2048.

Required: Yes


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

Type: String

Length Constraints: Minimum length of 1. Maximum length of 128.

Pattern: [\w]+

Required: Yes

Response Syntax

{ "Policy": "string" }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.


A key policy document in JSON format.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 131072.

Pattern: [\u0009\u000A\u000D\u0020-\u00FF]+


For information about the errors that are common to all actions, see Common Errors.


The system timed out while trying to fulfill the request. You can retry the request.

HTTP Status Code: 500


The request was rejected because a specified ARN, or an ARN in a key policy, is not valid.

HTTP Status Code: 400


The request was rejected because an internal exception occurred. The request can be retried.

HTTP Status Code: 500


The request was rejected because the state of the specified resource is not valid for this request.

This exceptions means one of the following:

  • The key state of the KMS key is not compatible with the operation.

    To find the key state, use the DescribeKey operation. For more information about which key states are compatible with each Amazon KMS operation, see Key states of Amazon KMS keys in the Amazon Key Management Service Developer Guide .

  • For cryptographic operations on KMS keys in custom key stores, this exception represents a general failure with many possible causes. To identify the cause, see the error message that accompanies the exception.

HTTP Status Code: 400


The request was rejected because the specified entity or resource could not be found.

HTTP Status Code: 400


The following examples are formatted for legibility.

Example Request

This example illustrates one usage of GetKeyPolicy.

POST / HTTP/1.1 Host: Content-Length: 74 X-Amz-Target: TrentService.GetKeyPolicy X-Amz-Date: 20161114T225546Z Content-Type: application/x-amz-json-1.1 Authorization: AWS4-HMAC-SHA256\ Credential=AKIAI44QH8DHBEXAMPLE/20161114/us-east-2/kms/aws4_request,\ SignedHeaders=content-type;host;x-amz-date;x-amz-target,\ Signature=a88e20eebfbea3bf62d1512d0d2987e2d233becc7631a442237d3661df623a40 { "PolicyName": "default", "KeyId": "1234abcd-12ab-34cd-56ef-1234567890ab" }

Example Response

This example illustrates one usage of GetKeyPolicy.

HTTP/1.1 200 OK Server: Server Date: Mon, 14 Nov 2016 22:55:47 GMT Content-Type: application/x-amz-json-1.1 Content-Length: 326 Connection: keep-alive x-amzn-RequestId: 7b105e7b-aabd-11e6-8039-3123b558b719 {"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 }"}

See Also

For more information about using this API in one of the language-specific Amazon SDKs, see the following: