AWS SDK または CLI で RevokeGrant を使用する

カスタマーマスターキーの権限を取り消すには

次の revoke-grant の例は、KMS キーから権限を削除します。次のコマンド例は、grant-id パラメータと key-id パラメータを指定します。key-id パラメータの値には、KMS キーのキー ID またはキー ARN を使用できます。

aws kms revoke-grant \
    --grant-id 1234a2345b8a4e350500d432bccf8ecd6506710e1391880c4f7f7140160c9af3 \
    --key-id 1234abcd-12ab-34cd-56ef-1234567890ab

このコマンドでは何も出力されません。権限が取り消されたことを確認するには、list-grants コマンドを使用します。

詳細については、「AWS Key Management Service デベロッパーガイド」の「グラントの使用停止と取り消し」を参照してください。

    /**
     * Revokes a grant for the specified AWS KMS key asynchronously.
     *
     * @param keyId   The ID or key ARN of the AWS KMS key.
     * @param grantId The identifier of the grant to be revoked.
     * @return A {@link CompletableFuture} representing the asynchronous operation of revoking the grant.
     *         The {@link CompletableFuture} will complete with a {@link RevokeGrantResponse} object
     *         if the operation is successful, or with a {@code null} value if an error occurs.
     */
    public CompletableFuture<RevokeGrantResponse> revokeKeyGrantAsync(String keyId, String grantId) {
        RevokeGrantRequest grantRequest = RevokeGrantRequest.builder()
            .keyId(keyId)
            .grantId(grantId)
            .build();

        CompletableFuture<RevokeGrantResponse> responseFuture = getAsyncClient().revokeGrant(grantRequest);
        responseFuture.whenComplete((response, exception) -> {
            if (exception == null) {
                logger.info("Grant ID: [" + grantId + "] was successfully revoked!");
            } else {
                if (exception instanceof KmsException kmsEx) {
                    if (kmsEx.getMessage().contains("Grant does not exist")) {
                        logger.info("The grant ID '" + grantId + "' does not exist. Moving on...");
                    } else {
                        throw new RuntimeException("KMS error occurred: " + kmsEx.getMessage(), kmsEx);
                    }
                } else {
                    throw new RuntimeException("An unexpected error occurred: " + exception.getMessage(), exception);
                }
            }
        });

        return responseFuture;
    }

    /***
     * @param string $grantId
     * @param string $keyId
     * @return void
     */
    public function revokeGrant(string $grantId, string $keyId)
    {
        try{
            $this->client->revokeGrant([
                'GrantId' => $grantId,
                'KeyId' => $keyId,
            ]);
        }catch(KmsException $caught){
            echo "There was a problem with revoking the grant: {$caught->getAwsErrorMessage()}.\n";
            throw $caught;
        }
    }

class GrantManager:
    def __init__(self, kms_client):
        self.kms_client = kms_client

    @classmethod
    def from_client(cls) -> "GrantManager":
        """
        Creates a GrantManager instance with a default KMS client.

        :return: An instance of GrantManager initialized with the default KMS client.
        """
        kms_client = boto3.client("kms")
        return cls(kms_client)


    def revoke_grant(self, key_id: str, grant_id: str) -> None:
        """
        Revokes a grant so that it can no longer be used.

        :param key_id: The ARN or ID of the key associated with the grant.
        :param grant_id: The ID of the grant to revoke.
        """
        try:
            self.kms_client.revoke_grant(KeyId=key_id, GrantId=grant_id)
        except ClientError as err:
            logger.error(
                "Couldn't revoke grant %s. Here's why: %s",
                grant_id,
                err.response["Error"]["Message"],
            )
            raise