AWS KMS External Key

AWS::KMS::Key (CloudFormation)

The Key in KMS can be configured in CloudFormation with the resource name AWS::KMS::Key. The following sections describe 10 examples of how to use the resource and its parameters.

Example Usage from GitHub

MarkBiesheuvel/demo-templates

    Type: AWS::KMS::Key
    Properties:
      Description: Symmetric key for demo
      Enabled: True
      EnableKeyRotation: True
      KeySpec: SYMMETRIC_DEFAULT

AWS-South-Wales-User-Group/qldb-kms-demo

      Type: AWS::KMS::Key
      DependsOn:
        - CreateRecordLambdaFunction
        - GetRecordLambdaFunction
      Properties:
        Description: 'QLDB Ledger CMK'

panther-labs/panther-analysis

                  "type": "AWS::KMS::Key"
              }
          ],
          "eventType": "AwsApiCall",
          "recipientAccountId": "123456789012"
      }

PokaInc/kolide-aws-samples

    Type: AWS::KMS::Key
    Properties:
      Description: KMS Key used for protecting Kolide Fleet's SSL private key
      EnableKeyRotation: true
      KeyPolicy:
        Version: '2012-10-17'

Coder-MJ911/hello-kms

      Type: AWS::KMS::Key
      Properties:
        Description: RSA_4096 asymmetric CMK
        KeySpec: RSA_4096
        KeyUsage: ENCRYPT_DECRYPT
        KeyPolicy:

PaloAltoNetworks/iac-scan-rules

   "rule":"$.Resources.*[?(@.Type=='AWS::KMS::Key')].Properties.EnableKeyRotation any null or $.Resources.*[?(@.Type=='AWS::KMS::Key')].Properties.EnableKeyRotation anyFalse",
   "id":"6ae8d0a5-4794-438c-aafa-200f94b45f1f",
   "enabled":true,
   "recommendation": {
      "name": "Recommended solution for enabling Customer Master Keys.",
      "description": "It is recommended that Customer Master Keys rotation is enabled. Please make sure your template has \"EnableKeyRotation\" attribute and it is set to \"true\"",

aws-quickstart/qs-cfn-lint-rules

      "Type": "AWS::KMS::Key",
      "Properties": {
        "EnableKeyRotation": false
      }
    },
    "EKMSKeyEnableKeyRotationSecondary": {

Checkmarx/kics

      "Type": "AWS::KMS::Key",
      "Properties": {
        "Enabled": true,
        "KeyPolicy": {
          "Version": "2012-10-17",
          "Id": "key-default-1",

Checkmarx/kics

      "Type": "AWS::KMS::Key",
      "Properties": {
        "Enabled": false,
        "KeyPolicy": {
          "Id": "key-default-1",
          "Statement": [

gcnyin/aws-practice

      "CloudTrailEvent": "{\"eventVersion\":\"1.05\",\"userIdentity\":{\"type\":\"IAMUser\",\"principalId\":\"AIDAXGJAWKEZ3D5NC2A3X\",\"arn\":\"arn:aws:iam::494526681395:user/hzhuang\",\"accountId\":\"494526681395\",\"accessKeyId\":\"ASIAXGJAWKEZ5R4FWDTG\",\"userName\":\"hzhuang\",\"sessionContext\":{\"sessionIssuer\":{},\"webIdFederationData\":{},\"attributes\":{\"mfaAuthenticated\":\"false\",\"creationDate\":\"2020-05-14T01:47:32Z\"}}},\"eventTime\":\"2020-05-14T01:47:46Z\",\"eventSource\":\"kms.amazonaws.com\",\"eventName\":\"GetKeyPolicy\",\"awsRegion\":\"ap-southeast-1\",\"sourceIPAddress\":\"202.66.38.130\",\"userAgent\":\"aws-internal/3 aws-sdk-java/1.11.742 Linux/4.9.184-0.1.ac.235.83.329.metal1.x86_64 OpenJDK_64-Bit_Server_VM/25.242-b08 java/1.8.0_242 vendor/Oracle_Corporation\",\"requestParameters\":{\"keyId\":\"aa5b2dc0-88ba-4e21-b339-82d8a18e9e6b\",\"policyName\":\"default\"},\"responseElements\":null,\"requestID\":\"dbd92b4e-b29e-493d-bd21-8fdd63806075\",\"eventID\":\"16731af3-a991-4b56-a7ad-348a1a2a73b6\",\"readOnly\":true,\"resources\":[{\"accountId\":\"494526681395\",\"type\":\"AWS::KMS::Key\",\"ARN\":\"arn:aws:kms:ap-southeast-1:494526681395:key/aa5b2dc0-88ba-4e21-b339-82d8a18e9e6b\"}],\"eventType\":\"AwsApiCall\",\"recipientAccountId\":\"494526681395\"}"
    },
    {
      "EventId": "5adb4de1-2822-451e-adb4-dd92bf6a84a5",
      "EventName": "ListAliases",
      "ReadOnly": "true",

Parameters

• Description optional - String
• Enabled optional - Boolean
• EnableKeyRotation optional - Boolean
• KeyPolicy required - Json
• KeyUsage optional - String
• KeySpec optional - String
• MultiRegion optional - Boolean
• PendingWindowInDays optional - Integer
• Tags optional - List of Tag

Explanation in CloudFormation Registry

The AWS::KMS::Key resource specifies a symmetric or asymmetric KMS key in AWS Key Management Service (AWS KMS).

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

You can use symmetric KMS keys to encrypt and decrypt small amounts of data, but they are more commonly used to generate data keys and data key pairs. You can also use symmetric KMS key to encrypt data stored in AWS services that are integrated with AWS KMS. For more information, see What is AWS Key Management Service? in the AWS Key Management Service Developer Guide.

You can use asymmetric KMS keys to encrypt and decrypt data or sign messages and verify signatures. To create an asymmetric key, you must specify an asymmetric KeySpec value and a KeyUsage value.

Important If you change the value of a Replacement property, such as KeyUsage or KeySpec, on an existing KMS key, the existing KMS key is scheduled for deletion and a new KMS key is created with the specified value. While scheduled for deletion, the existing KMS key becomes unusable. If you don't cancel the scheduled deletion of the existing KMS key outside of CloudFormation, all data encrypted under the existing KMS key becomes unrecoverable when the KMS key is deleted.