Use EnableKey with an AWS SDK or CLI

    using System;
    using System.Threading.Tasks;
    using Amazon.KeyManagementService;
    using Amazon.KeyManagementService.Model;

    /// <summary>
    /// Enable an AWS Key Management Service (AWS KMS) key.
    /// </summary>
    public class EnableKey
    {
        public static async Task Main()
        {
            var client = new AmazonKeyManagementServiceClient();

            // The identifier of the AWS KMS key to enable. You can use the
            // key Id or the Amazon Resource Name (ARN) of the AWS KMS key.
            var keyId = "1234abcd-12ab-34cd-56ef-1234567890ab";

            var request = new EnableKeyRequest
            {
                KeyId = keyId,
            };

            var response = await client.EnableKeyAsync(request);
            if (response.HttpStatusCode == System.Net.HttpStatusCode.OK)
            {
                // Retrieve information about the key to show that it has now
                // been enabled.
                var describeResponse = await client.DescribeKeyAsync(new DescribeKeyRequest
                {
                    KeyId = keyId,
                });
                Console.WriteLine($"{describeResponse.KeyMetadata.KeyId} - state: {describeResponse.KeyMetadata.KeyState}");
            }
        }
    }

To enable a KMS key

The following enable-key example enables a customer managed key. You can use a command like this one to enable a KMS key that you temporarily disabled by using the disable-key command. You can also use it to enable a KMS key that is disabled because it was scheduled for deletion and the deletion was canceled.

To specify the KMS key, use the key-id parameter. This example uses an key ID value, but you can use a key ID or key ARN value in this command.

Before running this command, replace the example key ID with a valid one.

aws kms enable-key \
    --key-id 1234abcd-12ab-34cd-56ef-1234567890ab

This command produces no output. To verify that the KMS key is enabled, use the describe-key command. See the values of the KeyState and Enabled fields in the describe-key output.

For more information, see Enabling and Disabling Keys in the AWS Key Management Service Developer Guide.

    /**
     * Asynchronously enables the specified key.
     *
     * @param keyId the ID of the key to enable
     * @return a {@link CompletableFuture} that completes when the key has been enabled
     */
    public CompletableFuture<Void> enableKeyAsync(String keyId) {
        EnableKeyRequest enableKeyRequest = EnableKeyRequest.builder()
            .keyId(keyId)
            .build();

        CompletableFuture<EnableKeyResponse> responseFuture = getAsyncClient().enableKey(enableKeyRequest);
        responseFuture.whenComplete((response, exception) -> {
            if (exception == null) {
                logger.info("Key with ID [{}] has been enabled.", keyId);
            } else {
                if (exception instanceof KmsException kmsEx) {
                    throw new RuntimeException("KMS error occurred while enabling key: " + kmsEx.getMessage(), kmsEx);
                } else {
                    throw new RuntimeException("An unexpected error occurred while enabling key: " + exception.getMessage(), exception);
                }
            }
        });

        return responseFuture.thenApply(response -> null);
    }

suspend fun enableKey(keyIdVal: String?) {
    val request =
        EnableKeyRequest {
            keyId = keyIdVal
        }

    KmsClient.fromEnvironment { region = "us-west-2" }.use { kmsClient ->
        kmsClient.enableKey(request)
        println("$keyIdVal was successfully enabled.")
    }
}

    /***
     * @param string $keyId
     * @return void
     */
    public function enableKey(string $keyId)
    {
        try {
            $this->client->enableKey([
                'KeyId' => $keyId,
            ]);
        }catch(KmsException $caught){
            if($caught->getAwsErrorMessage() == "NotFoundException"){
                echo "The request was rejected because the specified entity or resource could not be found.\n";
            }
            throw $caught;
        }
    }

class KeyManager:
    def __init__(self, kms_client):
        self.kms_client = kms_client
        self.created_keys = []

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

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


    def enable_key(self, key_id: str) -> None:
        """
        Enables a key. Gets the key state after each state change.

        :param key_id: The ARN or ID of the key to enable.
        """
        try:
            self.kms_client.enable_key(KeyId=key_id)
        except ClientError as err:
            logging.error(
                "Couldn't enable key '%s'. Here's why: %s",
                key_id,
                err.response["Error"]["Message"],
            )
            raise