NOTE: For Version 3 of the AWS SDK for PHP, please see the V3 User Guide and V3 API Reference.

# Class KmsClient

Client to interact with AWS Key Management Service

  Guzzle\Common\AbstractHasDispatcher implements Guzzle\Common\HasDispatcherInterface
  Guzzle\Http\Client implements Guzzle\Http\ClientInterface
  Guzzle\Service\Client implements Guzzle\Service\ClientInterface
  Aws\Common\Client\AbstractClient implements Aws\Common\Client\AwsClientInterface
  Aws\Kms\KmsClient

Namespace: Aws\Kms
Link: User guide
Link: API docs
Located at Aws/Kms/KmsClient.php

## Methods summary

- `public static` `factory ( array|Collection $config = array() )`

  Factory method to create a new AWS KMS client using an array of configuration options.

- `public` `cancelKeyDeletion ( array $args = array() )`

  Executes the CancelKeyDeletion operation.

- `public` `createAlias ( array $args = array() )`

  Executes the CreateAlias operation.

- `public` `createGrant ( array $args = array() )`

  Executes the CreateGrant operation.

- `public` `createKey ( array $args = array() )`

  Executes the CreateKey operation.

- `public` `decrypt ( array $args = array() )`

  Executes the Decrypt operation.

- `public` `deleteAlias ( array $args = array() )`

  Executes the DeleteAlias operation.

- `public` `describeKey ( array $args = array() )`

  Executes the DescribeKey operation.

- `public` `disableKey ( array $args = array() )`

  Executes the DisableKey operation.

- `public` `disableKeyRotation ( array $args = array() )`

  Executes the DisableKeyRotation operation.

- `public` `enableKey ( array $args = array() )`

  Executes the EnableKey operation.

- `public` `enableKeyRotation ( array $args = array() )`

  Executes the EnableKeyRotation operation.

- `public` `encrypt ( array $args = array() )`

  Executes the Encrypt operation.

- `public` `generateDataKey ( array $args = array() )`

  Executes the GenerateDataKey operation.

- `public` `generateDataKeyWithoutPlaintext ( array $args = array() )`

  Executes the GenerateDataKeyWithoutPlaintext operation.

- `public` `generateRandom ( array $args = array() )`

  Executes the GenerateRandom operation.

- `public` `getKeyPolicy ( array $args = array() )`

  Executes the GetKeyPolicy operation.

- `public` `getKeyRotationStatus ( array $args = array() )`

  Executes the GetKeyRotationStatus operation.

- `public` `listAliases ( array $args = array() )`

  Executes the ListAliases operation.

- `public` `listGrants ( array $args = array() )`

  Executes the ListGrants operation.

- `public` `listKeyPolicies ( array $args = array() )`

  Executes the ListKeyPolicies operation.

- `public` `listKeys ( array $args = array() )`

  Executes the ListKeys operation.

- `public` `listRetirableGrants ( array $args = array() )`

  Executes the ListRetirableGrants operation.

- `public` `putKeyPolicy ( array $args = array() )`

  Executes the PutKeyPolicy operation.

- `public` `reEncrypt ( array $args = array() )`

  Executes the ReEncrypt operation.

- `public` `retireGrant ( array $args = array() )`

  Executes the RetireGrant operation.

- `public` `revokeGrant ( array $args = array() )`

  Executes the RevokeGrant operation.

- `public` `scheduleKeyDeletion ( array $args = array() )`

  Executes the ScheduleKeyDeletion operation.

- `public` `updateAlias ( array $args = array() )`

  Executes the UpdateAlias operation.

- `public` `updateKeyDescription ( array $args = array() )`

  Executes the UpdateKeyDescription operation.

- `public` `getListAliasesIterator ( array $args = array() )`

  The input array uses the parameters of the ListAliases operation

- `public` `getListGrantsIterator ( array $args = array() )`

  The input array uses the parameters of the ListGrants operation

- `public` `getListKeyPoliciesIterator ( array $args = array() )`

  The input array uses the parameters of the ListKeyPolicies operation

- `public` `getListKeysIterator ( array $args = array() )`

  The input array uses the parameters of the ListKeys operation

## Methods detail

# `public static `Aws\Kms\KmsClient``
`factory( array|`Guzzle\Common\Collection` $config = array() )`

Factory method to create a new AWS KMS client using an array of configuration options.

See http://docs.aws.amazon.com/aws-sdk-php/v2/guide/configuration.html#client-configuration-options

#### Parameters

$config
  `array|`Guzzle\Common\Collection``
  $config Client configuration data

#### Returns

``Aws\Kms\KmsClient``

#### Link

http://docs.aws.amazon.com/aws-sdk-php/v2/guide/configuration.html#client-configuration-options

#### Overrides

`Guzzle\Service\Client::factory`
# `public `Guzzle\Service\Resource\Model``
`cancelKeyDeletion( array $args = array() )`

Executes the CancelKeyDeletion operation.

Cancels the deletion of a customer master key (CMK). When this operation is successful, the CMK is set to the Disabled state. To enable a CMK, use EnableKey.

For more information about scheduling and canceling deletion of a CMK, go to Deleting Customer Master Keys in the AWS Key Management Service Developer Guide.

#### Examples

- Basic formatting example

      $result = $client->cancelKeyDeletion(array(
          // KeyId is required
          'KeyId' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    The unique identifier for the customer master key (CMK) for which to cancel deletion.

    To specify this value, use the unique key ID or the Amazon Resource Name (ARN) of the CMK. Examples:

    - Unique key ID: 1234abcd-12ab-34cd-56ef-1234567890ab
    - Key ARN: arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To obtain the unique key ID and key ARN for a given CMK, use ListKeys or DescribeKey.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- KeyId => (string)

  The unique identifier of the master key for which deletion is canceled.

# `public `Guzzle\Service\Resource\Model``
`createAlias( array $args = array() )`

Executes the CreateAlias operation.

Creates a display name for a customer master key. An alias can be used to identify a key and should be unique. The console enforces a one-to-one mapping between the alias and a key. An alias name can contain only alphanumeric characters, forward slashes (/), underscores (_), and dashes (-). An alias must start with the word "alias" followed by a forward slash (alias/). An alias that begins with "aws" after the forward slash (alias/aws...) is reserved by Amazon Web Services (AWS).

The alias and the key it is mapped to must be in the same AWS account and the same region.

To map an alias to a different key, call UpdateAlias.

#### Examples

- Basic formatting example

      $result = $client->createAlias(array(
          // AliasName is required
          'AliasName' => 'string',
          // TargetKeyId is required
          'TargetKeyId' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - AliasName => (string)

    String that contains the display name. The name must start with the word "alias" followed by a forward slash (alias/). Aliases that begin with "alias/AWS" are reserved.

  - TargetKeyId => (string)

    An identifier of the key for which you are creating the alias. This value cannot be another alias but can be a globally unique identifier or a fully specified ARN to a key.

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

# `public `Guzzle\Service\Resource\Model``
`createGrant( array $args = array() )`

Executes the CreateGrant operation.

Adds a grant to a key to specify who can use the key and under what conditions. Grants are alternate permission mechanisms to key policies.

For more information about grants, see Grants in the AWS Key Management Service Developer Guide.

#### Examples

- Basic formatting example

      $result = $client->createGrant(array(
          // KeyId is required
          'KeyId' => 'string',
          // GranteePrincipal is required
          'GranteePrincipal' => 'string',
          'RetiringPrincipal' => 'string',
          'Operations' => array('string', ... ),
          'Constraints' => array(
              'EncryptionContextSubset' => array(
                  // Associative array of custom 'EncryptionContextKey' key names
                  'EncryptionContextKey' => 'string',
                  // ... repeated
              ),
              'EncryptionContextEquals' => array(
                  // Associative array of custom 'EncryptionContextKey' key names
                  'EncryptionContextKey' => 'string',
                  // ... repeated
              ),
          ),
          'GrantTokens' => array('string', ... ),
          'Name' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    The unique identifier for the customer master key (CMK) that the grant applies to.

    To specify this value, use the globally unique key ID or the Amazon Resource Name (ARN) of the key. Examples:

    - Globally unique key ID: 12345678-1234-1234-1234-123456789012
    - Key ARN: arn:aws:kms:us-west-2:123456789012:key/12345678-1234-1234-1234-123456789012
  - GranteePrincipal => (string)

    The principal that is given permission to perform the operations that the grant permits.

    To specify the principal, use the Amazon Resource Name (ARN) of an AWS principal. Valid AWS principals include AWS accounts (root), IAM users, federated users, and assumed role users. For examples of the ARN syntax to use for specifying a principal, see AWS Identity and Access Management (IAM) in the Example ARNs section of the AWS General Reference.

  - RetiringPrincipal => (string)

    The principal that is given permission to retire the grant by using RetireGrant operation.

    To specify the principal, use the Amazon Resource Name (ARN) of an AWS principal. Valid AWS principals include AWS accounts (root), IAM users, federated users, and assumed role users. For examples of the ARN syntax to use for specifying a principal, see AWS Identity and Access Management (IAM) in the Example ARNs section of the AWS General Reference.

  - Operations => (array<string: Decrypt | Encrypt | GenerateDataKey | GenerateDataKeyWithoutPlaintext | ReEncryptFrom | ReEncryptTo | CreateGrant | RetireGrant | DescribeKey >)

    A list of operations that the grant permits. The list can contain any combination of one or more of the following values:

    - Decrypt
    - Encrypt
    - GenerateDataKey
    - GenerateDataKeyWithoutPlaintext
    - ReEncryptFrom
    - ReEncryptTo
    - CreateGrant
    - RetireGrant
  - Constraints => (associative-array)

    The conditions under which the operations permitted by the grant are allowed.

    You can use this value to allow the operations permitted by the grant only when a specified encryption context is present. For more information, see Encryption Context in the AWS Key Management Service Developer Guide.

    - EncryptionContextSubset => (associative-array<string>)

      Associative array of <EncryptionContextKey> keys mapping to (string) values. Each array key should be changed to an appropriate <EncryptionContextKey>.

      Contains a list of key-value pairs, a subset of which must be present in the encryption context of a subsequent operation permitted by the grant. When a subsequent operation permitted by the grant includes an encryption context that matches this list or is a subset of this list, the grant allows the operation. Otherwise, the operation is not allowed.

      - <EncryptionContextKey> => (string)
    - EncryptionContextEquals => (associative-array<string>)

      Associative array of <EncryptionContextKey> keys mapping to (string) values. Each array key should be changed to an appropriate <EncryptionContextKey>.

      Contains a list of key-value pairs that must be present in the encryption context of a subsequent operation permitted by the grant. When a subsequent operation permitted by the grant includes an encryption context that matches this list, the grant allows the operation. Otherwise, the operation is not allowed.

      - <EncryptionContextKey> => (string)
  - GrantTokens => (array<string>)

    A list of grant tokens.

    For more information, go to Grant Tokens in the AWS Key Management Service Developer Guide.

  - Name => (string)

    A friendly name for identifying the grant. Use this value to prevent unintended creation of duplicate grants when retrying this request.

    When this value is absent, all CreateGrant requests result in a new grant with a unique GrantId even if all the supplied parameters are identical. This can result in unintended duplicates when you retry the CreateGrant request.

    When this value is present, you can retry a CreateGrant request with identical parameters; if the grant already exists, the original GrantId is returned without creating a new grant. Note that the returned grant token is unique with every CreateGrant request, even when a duplicate GrantId is returned. All grant tokens obtained in this way can be used interchangeably.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- GrantToken => (string)

  The grant token.

  For more information about using grant tokens, see Grant Tokens in the AWS Key Management Service Developer Guide.

- GrantId => (string)

  The unique identifier for the grant.

  You can use the GrantId in a subsequent RetireGrant or RevokeGrant operation.

# `public `Guzzle\Service\Resource\Model``
`createKey( array $args = array() )`

Executes the CreateKey operation.

Creates a customer master key. Customer master keys can be used to encrypt small amounts of data (less than 4K) directly, but they are most commonly used to encrypt or envelope data keys that are then used to encrypt customer data. For more information about data keys, see GenerateDataKey and GenerateDataKeyWithoutPlaintext.

#### Examples

- Basic formatting example

      $result = $client->createKey(array(
          'Policy' => 'string',
          'Description' => 'string',
          'KeyUsage' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - Policy => (string)

    Policy to attach to the key. This is required and delegates back to the account. The key is the root of trust. The policy size limit is 32 KiB (32768 bytes).

  - Description => (string)

    Description of the key. We recommend that you choose a description that helps your customer decide whether the key is appropriate for a task.

  - KeyUsage => (string: ENCRYPT_DECRYPT )

    Specifies the intended use of the key. Currently this defaults to ENCRYPT/DECRYPT, and only symmetric encryption and decryption are supported.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- KeyMetadata => (associative-array)

  Metadata associated with the key.

  - AWSAccountId => (string)

    The twelve-digit account ID of the AWS account that owns the key.

  - KeyId => (string)

    The globally unique identifier for the key.

  - Arn => (string)

    The Amazon Resource Name (ARN) of the key. For examples, see AWS Key Management Service (AWS KMS) in the Example ARNs section of the AWS General Reference.

  - CreationDate => (string)

    The date and time when the key was created.

  - Enabled => (bool)

    Specifies whether the key is enabled. When KeyState is Enabled this value is true, otherwise it is false.

  - Description => (string)

    The friendly description of the key.

  - KeyUsage => (string)

    The cryptographic operations for which you can use the key. Currently the only allowed value is ENCRYPT_DECRYPT, which means you can use the key for the Encrypt and Decrypt operations.

  - KeyState => (string)

    The state of the customer master key (CMK).

    For more information about how key state affects the use of a CMK, go to How Key State Affects the Use of a Customer Master Key in the AWS Key Management Service Developer Guide.

  - DeletionDate => (string)

    The date and time after which AWS KMS deletes the customer master key (CMK). This value is present only when KeyState is PendingDeletion, otherwise this value is null.

# `public `Guzzle\Service\Resource\Model``
`decrypt( array $args = array() )`

Executes the Decrypt operation.

Decrypts ciphertext. Ciphertext is plaintext that has been previously encrypted by using any of the following functions:

- GenerateDataKey
- GenerateDataKeyWithoutPlaintext
- Encrypt

Note that if a caller has been granted access permissions to all keys (through, for example, IAM user policies that grant Decrypt permission on all resources), then ciphertext encrypted by using keys in other accounts where the key grants access to the caller can be decrypted. To remedy this, we recommend that you do not grant Decrypt access in an IAM user policy. Instead grant Decrypt access only in key policies. If you must grant Decrypt access in an IAM user policy, you should scope the resource to specific keys or to specific trusted accounts.

#### Examples

- Basic formatting example

      $result = $client->decrypt(array(
          // CiphertextBlob is required
          'CiphertextBlob' => 'string',
          'EncryptionContext' => array(
              // Associative array of custom 'EncryptionContextKey' key names
              'EncryptionContextKey' => 'string',
              // ... repeated
          ),
          'GrantTokens' => array('string', ... ),
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - CiphertextBlob => (string)

    The supplied string value will be automatically base64 encoded by the SDK. Base64 encoding this value before passing it into an operation will double-encode the data.

    Ciphertext to be decrypted. The blob includes metadata.

  - EncryptionContext => (associative-array<string>)

    Associative array of <EncryptionContextKey> keys mapping to (string) values. Each array key should be changed to an appropriate <EncryptionContextKey>.

    The encryption context. If this was specified in the Encrypt function, it must be specified here or the decryption operation will fail. For more information, see Encryption Context.

    - <EncryptionContextKey> => (string)
  - GrantTokens => (array<string>)

    A list of grant tokens.

    For more information, go to Grant Tokens in the AWS Key Management Service Developer Guide.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- KeyId => (string)

  ARN of the key used to perform the decryption. This value is returned if no errors are encountered during the operation.

- Plaintext => (string)

  Decrypted plaintext data. This value may not be returned if the customer master key is not available or if you didn't have permission to use it.

# `public `Guzzle\Service\Resource\Model``
`deleteAlias( array $args = array() )`

Executes the DeleteAlias operation.

Deletes the specified alias. To map an alias to a different key, call UpdateAlias.

#### Examples

- Basic formatting example

      $result = $client->deleteAlias(array(
          // AliasName is required
          'AliasName' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - AliasName => (string)

    The alias to be deleted. The name must start with the word "alias" followed by a forward slash (alias/). Aliases that begin with "alias/AWS" are reserved.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

# `public `Guzzle\Service\Resource\Model``
`describeKey( array $args = array() )`

Executes the DescribeKey operation.

Provides detailed information about the specified customer master key.

#### Examples

- Basic formatting example

      $result = $client->describeKey(array(
          // KeyId is required
          'KeyId' => 'string',
          'GrantTokens' => array('string', ... ),
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier, a fully specified ARN to either an alias or a key, or an alias name prefixed by "alias/".

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Alias ARN Example - arn:aws:kms:us-east-1:123456789012:alias/MyAliasName
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012
    - Alias Name Example - alias/MyAliasName
  - GrantTokens => (array<string>)

    A list of grant tokens.

    For more information, go to Grant Tokens in the AWS Key Management Service Developer Guide.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- KeyMetadata => (associative-array)

  Metadata associated with the key.

  - AWSAccountId => (string)

    The twelve-digit account ID of the AWS account that owns the key.

  - KeyId => (string)

    The globally unique identifier for the key.

  - Arn => (string)

    The Amazon Resource Name (ARN) of the key. For examples, see AWS Key Management Service (AWS KMS) in the Example ARNs section of the AWS General Reference.

  - CreationDate => (string)

    The date and time when the key was created.

  - Enabled => (bool)

    Specifies whether the key is enabled. When KeyState is Enabled this value is true, otherwise it is false.

  - Description => (string)

    The friendly description of the key.

  - KeyUsage => (string)

    The cryptographic operations for which you can use the key. Currently the only allowed value is ENCRYPT_DECRYPT, which means you can use the key for the Encrypt and Decrypt operations.

  - KeyState => (string)

    The state of the customer master key (CMK).

    For more information about how key state affects the use of a CMK, go to How Key State Affects the Use of a Customer Master Key in the AWS Key Management Service Developer Guide.

  - DeletionDate => (string)

    The date and time after which AWS KMS deletes the customer master key (CMK). This value is present only when KeyState is PendingDeletion, otherwise this value is null.

# `public `Guzzle\Service\Resource\Model``
`disableKey( array $args = array() )`

Executes the DisableKey operation.

Sets the state of a master key to disabled, thereby preventing its use for cryptographic operations. For more information about how key state affects the use of a master key, go to How Key State Affects the Use of a Customer Master Key in the AWS Key Management Service Developer Guide.

#### Examples

- Basic formatting example

      $result = $client->disableKey(array(
          // KeyId is required
          'KeyId' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier or the fully specified ARN to a key.

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

# `public `Guzzle\Service\Resource\Model``
`disableKeyRotation( array $args = array() )`

Executes the DisableKeyRotation operation.

Disables rotation of the specified key.

#### Examples

- Basic formatting example

      $result = $client->disableKeyRotation(array(
          // KeyId is required
          'KeyId' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier or the fully specified ARN to a key.

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

# `public `Guzzle\Service\Resource\Model``
`enableKey( array $args = array() )`

Executes the EnableKey operation.

Marks a key as enabled, thereby permitting its use.

#### Examples

- Basic formatting example

      $result = $client->enableKey(array(
          // KeyId is required
          'KeyId' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier or the fully specified ARN to a key.

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

# `public `Guzzle\Service\Resource\Model``
`enableKeyRotation( array $args = array() )`

Executes the EnableKeyRotation operation.

Enables rotation of the specified customer master key.

#### Examples

- Basic formatting example

      $result = $client->enableKeyRotation(array(
          // KeyId is required
          'KeyId' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier or the fully specified ARN to a key.

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

# `public `Guzzle\Service\Resource\Model``
`encrypt( array $args = array() )`

Executes the Encrypt operation.

Encrypts plaintext into ciphertext by using a customer master key. The Encrypt function has two primary use cases:

- You can encrypt up to 4 KB of arbitrary data such as an RSA key, a database password, or other sensitive customer information.
- If you are moving encrypted data from one region to another, you can use this API to encrypt in the new region the plaintext data key that was used to encrypt the data in the original region. This provides you with an encrypted copy of the data key that can be decrypted in the new region and used there to decrypt the encrypted data.

Unless you are moving encrypted data from one region to another, you don't use this function to encrypt a generated data key within a region. You retrieve data keys already encrypted by calling the GenerateDataKey or GenerateDataKeyWithoutPlaintext function. Data keys don't need to be encrypted again by calling Encrypt .

If you want to encrypt data locally in your application, you can use the GenerateDataKey function to return a plaintext data encryption key and a copy of the key encrypted under the customer master key (CMK) of your choosing.

#### Examples

- Basic formatting example

      $result = $client->encrypt(array(
          // KeyId is required
          'KeyId' => 'string',
          // Plaintext is required
          'Plaintext' => 'string',
          'EncryptionContext' => array(
              // Associative array of custom 'EncryptionContextKey' key names
              'EncryptionContextKey' => 'string',
              // ... repeated
          ),
          'GrantTokens' => array('string', ... ),
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier, a fully specified ARN to either an alias or a key, or an alias name prefixed by "alias/".

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Alias ARN Example - arn:aws:kms:us-east-1:123456789012:alias/MyAliasName
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012
    - Alias Name Example - alias/MyAliasName
  - Plaintext => (string)

    The supplied string value will be automatically base64 encoded by the SDK. Base64 encoding this value before passing it into an operation will double-encode the data.

    Data to be encrypted.

  - EncryptionContext => (associative-array<string>)

    Associative array of <EncryptionContextKey> keys mapping to (string) values. Each array key should be changed to an appropriate <EncryptionContextKey>.

    Name/value pair that specifies the encryption context to be used for authenticated encryption. If used here, the same value must be supplied to the Decrypt API or decryption will fail. For more information, see Encryption Context.

    - <EncryptionContextKey> => (string)
  - GrantTokens => (array<string>)

    A list of grant tokens.

    For more information, go to Grant Tokens in the AWS Key Management Service Developer Guide.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- CiphertextBlob => (string)

  The encrypted plaintext. If you are using the CLI, the value is Base64 encoded. Otherwise, it is not encoded.

- KeyId => (string)

  The ID of the key used during encryption.

# `public `Guzzle\Service\Resource\Model``
`generateDataKey( array $args = array() )`

Executes the GenerateDataKey operation.

Generates a data key that you can use in your application to locally encrypt data. This call returns a plaintext version of the key in the Plaintext field of the response object and an encrypted copy of the key in the CiphertextBlob field. The key is encrypted by using the master key specified by the KeyId field. To decrypt the encrypted key, pass it to the Decrypt API.

We recommend that you use the following pattern to locally encrypt data: call the GenerateDataKey API, use the key returned in the Plaintext response field to locally encrypt data, and then erase the plaintext data key from memory. Store the encrypted data key (contained in the CiphertextBlob field) alongside of the locally encrypted data.

You should not call the Encrypt function to re-encrypt your data keys within a region. GenerateDataKey always returns the data key encrypted and tied to the customer master key that will be used to decrypt it. There is no need to decrypt it twice.

If you decide to use the optional EncryptionContext parameter, you must also store the context in full or at least store enough information along with the encrypted data to be able to reconstruct the context when submitting the ciphertext to the Decrypt API. It is a good practice to choose a context that you can reconstruct on the fly to better secure the ciphertext. For more information about how this parameter is used, see Encryption Context.

To decrypt data, pass the encrypted data key to the Decrypt API. Decrypt uses the associated master key to decrypt the encrypted data key and returns it as plaintext. Use the plaintext data key to locally decrypt your data and then erase the key from memory. You must specify the encryption context, if any, that you specified when you generated the key. The encryption context is logged by CloudTrail, and you can use this log to help track the use of particular data.

#### Examples

- Basic formatting example

      $result = $client->generateDataKey(array(
          // KeyId is required
          'KeyId' => 'string',
          'EncryptionContext' => array(
              // Associative array of custom 'EncryptionContextKey' key names
              'EncryptionContextKey' => 'string',
              // ... repeated
          ),
          'NumberOfBytes' => integer,
          'KeySpec' => 'string',
          'GrantTokens' => array('string', ... ),
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier, a fully specified ARN to either an alias or a key, or an alias name prefixed by "alias/".

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Alias ARN Example - arn:aws:kms:us-east-1:123456789012:alias/MyAliasName
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012
    - Alias Name Example - alias/MyAliasName
  - EncryptionContext => (associative-array<string>)

    Associative array of <EncryptionContextKey> keys mapping to (string) values. Each array key should be changed to an appropriate <EncryptionContextKey>.

    Name/value pair that contains additional data to be authenticated during the encryption and decryption processes that use the key. This value is logged by AWS CloudTrail to provide context around the data encrypted by the key.

    - <EncryptionContextKey> => (string)
  - NumberOfBytes => (int)

    Integer that contains the number of bytes to generate. Common values are 128, 256, 512, and 1024. 1024 is the current limit. We recommend that you use the KeySpec parameter instead.

  - KeySpec => (string: AES256 | AES128 )

    Value that identifies the encryption algorithm and key size to generate a data key for. Currently this can be AES128 or AES256.

  - GrantTokens => (array<string>)

    A list of grant tokens.

    For more information, go to Grant Tokens in the AWS Key Management Service Developer Guide.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- CiphertextBlob => (string)

  Ciphertext that contains the encrypted data key. You must store the blob and enough information to reconstruct the encryption context so that the data encrypted by using the key can later be decrypted. You must provide both the ciphertext blob and the encryption context to the Decrypt API to recover the plaintext data key and decrypt the object.

  If you are using the CLI, the value is Base64 encoded. Otherwise, it is not encoded.

- Plaintext => (string)

  Plaintext that contains the data key. Use this for encryption and decryption and then remove it from memory as soon as possible.

- KeyId => (string)

  System generated unique identifier of the key to be used to decrypt the encrypted copy of the data key.

# `public `Guzzle\Service\Resource\Model``
`generateDataKeyWithoutPlaintext( array $args = array() )`

Executes the GenerateDataKeyWithoutPlaintext operation.

Returns a data key encrypted by a customer master key without the plaintext copy of that key. Otherwise, this API functions exactly like GenerateDataKey. You can use this API to, for example, satisfy an audit requirement that an encrypted key be made available without exposing the plaintext copy of that key.

#### Examples

- Basic formatting example

      $result = $client->generateDataKeyWithoutPlaintext(array(
          // KeyId is required
          'KeyId' => 'string',
          'EncryptionContext' => array(
              // Associative array of custom 'EncryptionContextKey' key names
              'EncryptionContextKey' => 'string',
              // ... repeated
          ),
          'KeySpec' => 'string',
          'NumberOfBytes' => integer,
          'GrantTokens' => array('string', ... ),
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier, a fully specified ARN to either an alias or a key, or an alias name prefixed by "alias/".

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Alias ARN Example - arn:aws:kms:us-east-1:123456789012:alias/MyAliasName
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012
    - Alias Name Example - alias/MyAliasName
  - EncryptionContext => (associative-array<string>)

    Associative array of <EncryptionContextKey> keys mapping to (string) values. Each array key should be changed to an appropriate <EncryptionContextKey>.

    Name:value pair that contains additional data to be authenticated during the encryption and decryption processes.

    - <EncryptionContextKey> => (string)
  - KeySpec => (string: AES256 | AES128 )

    Value that identifies the encryption algorithm and key size. Currently this can be AES128 or AES256.

  - NumberOfBytes => (int)

    Integer that contains the number of bytes to generate. Common values are 128, 256, 512, 1024 and so on. We recommend that you use the KeySpec parameter instead.

  - GrantTokens => (array<string>)

    A list of grant tokens.

    For more information, go to Grant Tokens in the AWS Key Management Service Developer Guide.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- CiphertextBlob => (string)

  Ciphertext that contains the wrapped data key. You must store the blob and encryption context so that the key can be used in a future decrypt operation.

  If you are using the CLI, the value is Base64 encoded. Otherwise, it is not encoded.

- KeyId => (string)

  System generated unique identifier of the key to be used to decrypt the encrypted copy of the data key.

# `public `Guzzle\Service\Resource\Model``
`generateRandom( array $args = array() )`

Executes the GenerateRandom operation.

Generates an unpredictable byte string.

#### Examples

- Basic formatting example

      $result = $client->generateRandom(array(
          'NumberOfBytes' => integer,
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - NumberOfBytes => (int)

    Integer that contains the number of bytes to generate. Common values are 128, 256, 512, 1024 and so on. The current limit is 1024 bytes.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- Plaintext => (string)

  Plaintext that contains the unpredictable byte string.

# `public `Guzzle\Service\Resource\Model``
`getKeyPolicy( array $args = array() )`

Executes the GetKeyPolicy operation.

Retrieves a policy attached to the specified key.

#### Examples

- Basic formatting example

      $result = $client->getKeyPolicy(array(
          // KeyId is required
          'KeyId' => 'string',
          // PolicyName is required
          'PolicyName' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier or the fully specified ARN to a key.

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012
  - PolicyName => (string)

    String that contains the name of the policy. Currently, this must be "default". Policy names can be discovered by calling ListKeyPolicies.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- Policy => (string)

  A policy document in JSON format.

# `public `Guzzle\Service\Resource\Model``
`getKeyRotationStatus( array $args = array() )`

Executes the GetKeyRotationStatus operation.

Retrieves a Boolean value that indicates whether key rotation is enabled for the specified key.

#### Examples

- Basic formatting example

      $result = $client->getKeyRotationStatus(array(
          // KeyId is required
          'KeyId' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier or the fully specified ARN to a key.

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- KeyRotationEnabled => (bool)

  A Boolean value that specifies whether key rotation is enabled.

# `public `Guzzle\Service\Resource\Model``
`listAliases( array $args = array() )`

Executes the ListAliases operation.

Lists all of the key aliases in the account.

#### Examples

- Basic formatting example

      $result = $client->listAliases(array(
          'Limit' => integer,
          'Marker' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - Limit => (int)

    When paginating results, specify the maximum number of items to return in the response. If additional items exist beyond the number you specify, the Truncated element in the response is set to true.

    This value is optional. If you include a value, it must be between 1 and 100, inclusive. If you do not include a value, it defaults to 50.

  - Marker => (string)

    Use this parameter only when paginating results and only in a subsequent request after you've received a response with truncated results. Set it to the value of NextMarker from the response you just received.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- Aliases => (array<associative-array>)

  A list of key aliases in the user's account.

  - (associative-array)

    Contains information about an alias.

    - AliasName => (string)

      String that contains the alias.

    - AliasArn => (string)

      String that contains the key ARN.

    - TargetKeyId => (string)

      String that contains the key identifier pointed to by the alias.

- NextMarker => (string)

  When Truncated is true, this value is present and contains the value to use for the Marker parameter in a subsequent pagination request.

- Truncated => (bool)

  A flag that indicates whether there are more items in the list. If your results were truncated, you can use the Marker parameter to make a subsequent pagination request to retrieve more items in the list.

# `public `Guzzle\Service\Resource\Model``
`listGrants( array $args = array() )`

Executes the ListGrants operation.

List the grants for a specified key.

#### Examples

- Basic formatting example

      $result = $client->listGrants(array(
          'Limit' => integer,
          'Marker' => 'string',
          // KeyId is required
          'KeyId' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - Limit => (int)

    When paginating results, specify the maximum number of items to return in the response. If additional items exist beyond the number you specify, the Truncated element in the response is set to true.

    This value is optional. If you include a value, it must be between 1 and 100, inclusive. If you do not include a value, it defaults to 50.

  - Marker => (string)

    Use this parameter only when paginating results and only in a subsequent request after you've received a response with truncated results. Set it to the value of NextMarker from the response you just received.

  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier or the fully specified ARN to a key.

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- Grants => (array<associative-array>)

  A list of grants.

  - (associative-array)

    Contains information about an entry in a list of grants.

    - KeyId => (string)

      The unique identifier for the customer master key (CMK) to which the grant applies.

    - GrantId => (string)

      The unique identifier for the grant.

    - Name => (string)

      The friendly name that identifies the grant. If a name was provided in the CreateGrant request, that name is returned. Otherwise this value is null.

    - CreationDate => (string)

      The date and time when the grant was created.

    - GranteePrincipal => (string)

      The principal that receives the grant's permissions.

    - RetiringPrincipal => (string)

      The principal that can retire the grant.

    - IssuingAccount => (string)

      The AWS account under which the grant was issued.

    - Operations => (array<string>)

      The list of operations permitted by the grant.

    - Constraints => (associative-array)

      The conditions under which the grant's operations are allowed.

      - EncryptionContextSubset => (associative-array<string>)

        Associative array of <string> keys mapping to (string) values. Each array key should be changed to an appropriate <string>.

        Contains a list of key-value pairs, a subset of which must be present in the encryption context of a subsequent operation permitted by the grant. When a subsequent operation permitted by the grant includes an encryption context that matches this list or is a subset of this list, the grant allows the operation. Otherwise, the operation is not allowed.

        - <string> => (string)
      - EncryptionContextEquals => (associative-array<string>)

        Associative array of <string> keys mapping to (string) values. Each array key should be changed to an appropriate <string>.

        Contains a list of key-value pairs that must be present in the encryption context of a subsequent operation permitted by the grant. When a subsequent operation permitted by the grant includes an encryption context that matches this list, the grant allows the operation. Otherwise, the operation is not allowed.

        - <string> => (string)
- NextMarker => (string)

  When Truncated is true, this value is present and contains the value to use for the Marker parameter in a subsequent pagination request.

- Truncated => (bool)

  A flag that indicates whether there are more items in the list. If your results were truncated, you can use the Marker parameter to make a subsequent pagination request to retrieve more items in the list.

# `public `Guzzle\Service\Resource\Model``
`listKeyPolicies( array $args = array() )`

Executes the ListKeyPolicies operation.

Retrieves a list of policies attached to a key.

#### Examples

- Basic formatting example

      $result = $client->listKeyPolicies(array(
          // KeyId is required
          'KeyId' => 'string',
          'Limit' => integer,
          'Marker' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier, a fully specified ARN to either an alias or a key, or an alias name prefixed by "alias/".

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Alias ARN Example - arn:aws:kms:us-east-1:123456789012:alias/MyAliasName
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012
    - Alias Name Example - alias/MyAliasName
  - Limit => (int)

    When paginating results, specify the maximum number of items to return in the response. If additional items exist beyond the number you specify, the Truncated element in the response is set to true.

    This value is optional. If you include a value, it must be between 1 and 1000, inclusive. If you do not include a value, it defaults to 100.

    Currently only 1 policy can be attached to a key.

  - Marker => (string)

    Use this parameter only when paginating results and only in a subsequent request after you've received a response with truncated results. Set it to the value of NextMarker from the response you just received.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- PolicyNames => (array<string>)

  A list of policy names. Currently, there is only one policy and it is named "Default".

- NextMarker => (string)

  When Truncated is true, this value is present and contains the value to use for the Marker parameter in a subsequent pagination request.

- Truncated => (bool)

  A flag that indicates whether there are more items in the list. If your results were truncated, you can use the Marker parameter to make a subsequent pagination request to retrieve more items in the list.

# `public `Guzzle\Service\Resource\Model``
`listKeys( array $args = array() )`

Executes the ListKeys operation.

Lists the customer master keys.

#### Examples

- Basic formatting example

      $result = $client->listKeys(array(
          'Limit' => integer,
          'Marker' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - Limit => (int)

    When paginating results, specify the maximum number of items to return in the response. If additional items exist beyond the number you specify, the Truncated element in the response is set to true.

    This value is optional. If you include a value, it must be between 1 and 1000, inclusive. If you do not include a value, it defaults to 100.

  - Marker => (string)

    Use this parameter only when paginating results and only in a subsequent request after you've received a response with truncated results. Set it to the value of NextMarker from the response you just received.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- Keys => (array<associative-array>)

  A list of keys.

  - (associative-array)

    Contains information about each entry in the key list.

    - KeyId => (string)

      Unique identifier of the key.

    - KeyArn => (string)

      ARN of the key.

- NextMarker => (string)

  When Truncated is true, this value is present and contains the value to use for the Marker parameter in a subsequent pagination request.

- Truncated => (bool)

  A flag that indicates whether there are more items in the list. If your results were truncated, you can use the Marker parameter to make a subsequent pagination request to retrieve more items in the list.

# `public `Guzzle\Service\Resource\Model``
`listRetirableGrants( array $args = array() )`

Executes the ListRetirableGrants operation.

Returns a list of all grants for which the grant's RetiringPrincipal matches the one specified.

A typical use is to list all grants that you are able to retire. To retire a grant, use RetireGrant.

#### Examples

- Basic formatting example

      $result = $client->listRetirableGrants(array(
          'Limit' => integer,
          'Marker' => 'string',
          // RetiringPrincipal is required
          'RetiringPrincipal' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - Limit => (int)

    When paginating results, specify the maximum number of items to return in the response. If additional items exist beyond the number you specify, the Truncated element in the response is set to true.

    This value is optional. If you include a value, it must be between 1 and 100, inclusive. If you do not include a value, it defaults to 50.

  - Marker => (string)

    Use this parameter only when paginating results and only in a subsequent request after you receive a response with truncated results. Set it to the value of NextMarker from the response you just received.

  - RetiringPrincipal => (string)

    The retiring principal for which to list grants.

    To specify the retiring principal, use the Amazon Resource Name (ARN) of an AWS principal. Valid AWS principals include AWS accounts (root), IAM users, federated users, and assumed role users. For examples of the ARN syntax for specifying a principal, go to AWS Identity and Access Management (IAM) in the Example ARNs section of the Amazon Web Services General Reference.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- Grants => (array<associative-array>)

  A list of grants.

  - (associative-array)

    Contains information about an entry in a list of grants.

    - KeyId => (string)

      The unique identifier for the customer master key (CMK) to which the grant applies.

    - GrantId => (string)

      The unique identifier for the grant.

    - Name => (string)

      The friendly name that identifies the grant. If a name was provided in the CreateGrant request, that name is returned. Otherwise this value is null.

    - CreationDate => (string)

      The date and time when the grant was created.

    - GranteePrincipal => (string)

      The principal that receives the grant's permissions.

    - RetiringPrincipal => (string)

      The principal that can retire the grant.

    - IssuingAccount => (string)

      The AWS account under which the grant was issued.

    - Operations => (array<string>)

      The list of operations permitted by the grant.

    - Constraints => (associative-array)

      The conditions under which the grant's operations are allowed.

      - EncryptionContextSubset => (associative-array<string>)

        Associative array of <string> keys mapping to (string) values. Each array key should be changed to an appropriate <string>.

        Contains a list of key-value pairs, a subset of which must be present in the encryption context of a subsequent operation permitted by the grant. When a subsequent operation permitted by the grant includes an encryption context that matches this list or is a subset of this list, the grant allows the operation. Otherwise, the operation is not allowed.

        - <string> => (string)
      - EncryptionContextEquals => (associative-array<string>)

        Associative array of <string> keys mapping to (string) values. Each array key should be changed to an appropriate <string>.

        Contains a list of key-value pairs that must be present in the encryption context of a subsequent operation permitted by the grant. When a subsequent operation permitted by the grant includes an encryption context that matches this list, the grant allows the operation. Otherwise, the operation is not allowed.

        - <string> => (string)
- NextMarker => (string)

  When Truncated is true, this value is present and contains the value to use for the Marker parameter in a subsequent pagination request.

- Truncated => (bool)

  A flag that indicates whether there are more items in the list. If your results were truncated, you can use the Marker parameter to make a subsequent pagination request to retrieve more items in the list.

# `public `Guzzle\Service\Resource\Model``
`putKeyPolicy( array $args = array() )`

Executes the PutKeyPolicy operation.

Attaches a policy to the specified key.

#### Examples

- Basic formatting example

      $result = $client->putKeyPolicy(array(
          // KeyId is required
          'KeyId' => 'string',
          // PolicyName is required
          'PolicyName' => 'string',
          // Policy is required
          'Policy' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier or the fully specified ARN to a key.

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012
  - PolicyName => (string)

    Name of the policy to be attached. Currently, the only supported name is "default".

  - Policy => (string)

    The policy to attach to the key. This is required and delegates back to the account. The key is the root of trust. The policy size limit is 32 KiB (32768 bytes).

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

# `public `Guzzle\Service\Resource\Model``
`reEncrypt( array $args = array() )`

Executes the ReEncrypt operation.

Encrypts data on the server side with a new customer master key without exposing the plaintext of the data on the client side. The data is first decrypted and then encrypted. This operation can also be used to change the encryption context of a ciphertext.

Unlike other actions, ReEncrypt is authorized twice - once as ReEncryptFrom on the source key and once as ReEncryptTo on the destination key. We therefore recommend that you include the action statement in your key policies to permit re-encryption from or to the key. The statement is included automatically when you authorize use of the key through the console but must be included manually when you set a policy by using the PutKeyPolicy function.

#### Examples

- Basic formatting example

      $result = $client->reEncrypt(array(
          // CiphertextBlob is required
          'CiphertextBlob' => 'string',
          'SourceEncryptionContext' => array(
              // Associative array of custom 'EncryptionContextKey' key names
              'EncryptionContextKey' => 'string',
              // ... repeated
          ),
          // DestinationKeyId is required
          'DestinationKeyId' => 'string',
          'DestinationEncryptionContext' => array(
              // Associative array of custom 'EncryptionContextKey' key names
              'EncryptionContextKey' => 'string',
              // ... repeated
          ),
          'GrantTokens' => array('string', ... ),
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - CiphertextBlob => (string)

    The supplied string value will be automatically base64 encoded by the SDK. Base64 encoding this value before passing it into an operation will double-encode the data.

    Ciphertext of the data to re-encrypt.

  - SourceEncryptionContext => (associative-array<string>)

    Associative array of <EncryptionContextKey> keys mapping to (string) values. Each array key should be changed to an appropriate <EncryptionContextKey>.

    Encryption context used to encrypt and decrypt the data specified in the CiphertextBlob parameter.

    - <EncryptionContextKey> => (string)
  - DestinationKeyId => (string)

    A unique identifier for the customer master key used to re-encrypt the data. This value can be a globally unique identifier, a fully specified ARN to either an alias or a key, or an alias name prefixed by "alias/".

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Alias ARN Example - arn:aws:kms:us-east-1:123456789012:alias/MyAliasName
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012
    - Alias Name Example - alias/MyAliasName
  - DestinationEncryptionContext => (associative-array<string>)

    Associative array of <EncryptionContextKey> keys mapping to (string) values. Each array key should be changed to an appropriate <EncryptionContextKey>.

    Encryption context to be used when the data is re-encrypted.

    - <EncryptionContextKey> => (string)
  - GrantTokens => (array<string>)

    A list of grant tokens.

    For more information, go to Grant Tokens in the AWS Key Management Service Developer Guide.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- CiphertextBlob => (string)

  The re-encrypted data. If you are using the CLI, the value is Base64 encoded. Otherwise, it is not encoded.

- SourceKeyId => (string)

  Unique identifier of the key used to originally encrypt the data.

- KeyId => (string)

  Unique identifier of the key used to re-encrypt the data.

# `public `Guzzle\Service\Resource\Model``
`retireGrant( array $args = array() )`

Executes the RetireGrant operation.

Retires a grant. You can retire a grant when you're done using it to clean up. You should revoke a grant when you intend to actively deny operations that depend on it. The following are permitted to call this API:

- The account that created the grant
- The RetiringPrincipal , if present
- The GranteePrincipal , if RetireGrant is a grantee operation

The grant to retire must be identified by its grant token or by a combination of the key ARN and the grant ID. A grant token is a unique variable-length base64-encoded string. A grant ID is a 64 character unique identifier of a grant. Both are returned by the CreateGrant function.

#### Examples

- Basic formatting example

      $result = $client->retireGrant(array(
          'GrantToken' => 'string',
          'KeyId' => 'string',
          'GrantId' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - GrantToken => (string)

    Token that identifies the grant to be retired.

  - KeyId => (string)

    A unique identifier for the customer master key associated with the grant. This value can be a globally unique identifier or a fully specified ARN of the key.

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012
  - GrantId => (string)

    Unique identifier of the grant to be retired. The grant ID is returned by the CreateGrant function.

    - Grant ID Example - 0123456789012345678901234567890123456789012345678901234567890123

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

# `public `Guzzle\Service\Resource\Model``
`revokeGrant( array $args = array() )`

Executes the RevokeGrant operation.

Revokes a grant. You can revoke a grant to actively deny operations that depend on it.

#### Examples

- Basic formatting example

      $result = $client->revokeGrant(array(
          // KeyId is required
          'KeyId' => 'string',
          // GrantId is required
          'GrantId' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key associated with the grant. This value can be a globally unique identifier or the fully specified ARN to a key.

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012
  - GrantId => (string)

    Identifier of the grant to be revoked.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

# `public `Guzzle\Service\Resource\Model``
`scheduleKeyDeletion( array $args = array() )`

Executes the ScheduleKeyDeletion operation.

Schedules the deletion of a customer master key (CMK). You may provide a waiting period, specified in days, before deletion occurs. If you do not provide a waiting period, the default period of 30 days is used. When this operation is successful, the state of the CMK changes to PendingDeletion . Before the waiting period ends, you can use CancelKeyDeletion to cancel the deletion of the CMK. After the waiting period ends, AWS KMS deletes the CMK and all AWS KMS data associated with it, including all aliases that point to it.

Deleting a CMK is a destructive and potentially dangerous operation. When a CMK is deleted, all data that was encrypted under the CMK is rendered unrecoverable. To restrict the use of a CMK without deleting it, use DisableKey.

For more information about scheduling a CMK for deletion, go to Deleting Customer Master Keys in the AWS Key Management Service Developer Guide.

#### Examples

- Basic formatting example

      $result = $client->scheduleKeyDeletion(array(
          // KeyId is required
          'KeyId' => 'string',
          'PendingWindowInDays' => integer,
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    The unique identifier for the customer master key (CMK) to delete.

    To specify this value, use the unique key ID or the Amazon Resource Name (ARN) of the CMK. Examples:

    - Unique key ID: 1234abcd-12ab-34cd-56ef-1234567890ab
    - Key ARN: arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

    To obtain the unique key ID and key ARN for a given CMK, use ListKeys or DescribeKey.

  - PendingWindowInDays => (int)

    The waiting period, specified in number of days. After the waiting period ends, AWS KMS deletes the customer master key (CMK).

    This value is optional. If you include a value, it must be between 7 and 30, inclusive. If you do not include a value, it defaults to 30.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

- KeyId => (string)

  The unique identifier of the customer master key (CMK) for which deletion is scheduled.

- DeletionDate => (string)

  The date and time after which AWS KMS deletes the customer master key (CMK).

# `public `Guzzle\Service\Resource\Model``
`updateAlias( array $args = array() )`

Executes the UpdateAlias operation.

Updates an alias to map it to a different key.

An alias is not a property of a key. Therefore, an alias can be mapped to and unmapped from an existing key without changing the properties of the key.

An alias name can contain only alphanumeric characters, forward slashes (/), underscores (_), and dashes (-). An alias must start with the word "alias" followed by a forward slash (alias/). An alias that begins with "aws" after the forward slash (alias/aws...) is reserved by Amazon Web Services (AWS).

The alias and the key it is mapped to must be in the same AWS account and the same region.

#### Examples

- Basic formatting example

      $result = $client->updateAlias(array(
          // AliasName is required
          'AliasName' => 'string',
          // TargetKeyId is required
          'TargetKeyId' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - AliasName => (string)

    String that contains the name of the alias to be modified. The name must start with the word "alias" followed by a forward slash (alias/). Aliases that begin with "alias/aws" are reserved.

  - TargetKeyId => (string)

    Unique identifier of the customer master key to be mapped to the alias. This value can be a globally unique identifier or the fully specified ARN of a key.

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012

    You can call ListAliases to verify that the alias is mapped to the correct TargetKeyId.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

# `public `Guzzle\Service\Resource\Model``
`updateKeyDescription( array $args = array() )`

Executes the UpdateKeyDescription operation.

Updates the description of a key.

#### Examples

- Basic formatting example

      $result = $client->updateKeyDescription(array(
          // KeyId is required
          'KeyId' => 'string',
          // Description is required
          'Description' => 'string',
      ));

#### Parameters

$args
  `array`
  $arg Associative array containing the following keys (required keys are bold):
  - KeyId => (string)

    A unique identifier for the customer master key. This value can be a globally unique identifier or the fully specified ARN to a key.

    - Key ARN Example - arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012
    - Globally Unique Key ID Example - 12345678-1234-1234-1234-123456789012
  - Description => (string)

    New description for the key.

#### Returns

``Guzzle\Service\Resource\Model``
Returns a response Model object

# `public ResourceIteratorInterface`
`getListAliasesIterator( array $args = array() )`

The input array uses the parameters of the ListAliases operation

#### Parameters

$args
  `array`
  $args

#### Returns

`ResourceIteratorInterface`
# `public ResourceIteratorInterface`
`getListGrantsIterator( array $args = array() )`

The input array uses the parameters of the ListGrants operation

#### Parameters

$args
  `array`
  $args

#### Returns

`ResourceIteratorInterface`
# `public ResourceIteratorInterface`
`getListKeyPoliciesIterator( array $args = array() )`

The input array uses the parameters of the ListKeyPolicies operation

#### Parameters

$args
  `array`
  $args

#### Returns

`ResourceIteratorInterface`
# `public ResourceIteratorInterface`
`getListKeysIterator( array $args = array() )`

The input array uses the parameters of the ListKeys operation

#### Parameters

$args
  `array`
  $args

#### Returns

`ResourceIteratorInterface`

### Methods inherited from Aws\Common\Client\AbstractClient

`__call()`, `__construct()`, `createRequest()`, `getAllEvents()`, `getApiVersion()`, `getCredentials()`, `getRegion()`, `getRegions()`, `getSignature()`, `getWaiter()`, `getWaiterFactory()`, `send()`, `setCredentials()`, `setRegion()`, `setWaiterFactory()`, `waitUntil()`

### Methods inherited from Guzzle\Service\Client

`execute()`, `executeMultiple()`, `getCommand()`, `getCommandFactory()`, `getDescription()`, `getInflector()`, `getIterator()`, `getResourceIteratorFactory()`, `prepareCommand()`, `setCommandFactory()`, `setDescription()`, `setInflector()`, `setResourceIteratorFactory()`

### Methods inherited from Guzzle\Http\Client

`delete()`, `expandTemplate()`, `extractPharCacert()`, `get()`, `getBaseUrl()`, `getConfig()`, `getCurlMulti()`, `getDefaultOption()`, `getDefaultUserAgent()`, `getUriTemplate()`, `head()`, `initSsl()`, `options()`, `patch()`, `post()`, `prepareRequest()`, `put()`, `sendMultiple()`, `setBaseUrl()`, `setConfig()`, `setCurlMulti()`, `setDefaultOption()`, `setRequestFactory()`, `setSslVerification()`, `setUriTemplate()`, `setUserAgent()`

### Methods inherited from Guzzle\Common\AbstractHasDispatcher

`addSubscriber()`, `dispatch()`, `getEventDispatcher()`, `setEventDispatcher()`

### Magic methods summary

## Constants summary

`string` | `LATEST_API_VERSION` | `'2014-11-01'` | #

### Constants inherited from Guzzle\Service\Client

`COMMAND_PARAMS`

### Constants inherited from Guzzle\Http\Client

`CURL_OPTIONS`, `DEFAULT_SELECT_TIMEOUT`, `DISABLE_REDIRECTS`, `MAX_HANDLES`, `REQUEST_OPTIONS`, `SSL_CERT_AUTHORITY`

### Constants inherited from Guzzle\Http\ClientInterface

`CREATE_REQUEST`, `HTTP_DATE`

## Properties summary

### Properties inherited from Aws\Common\Client\AbstractClient

`$aggregator`, `$credentials`, `$signature`, `$waiterFactory`

### Properties inherited from Guzzle\Service\Client

`$commandFactory`, `$inflector`, `$resourceIteratorFactory`, `$serviceDescription`

### Properties inherited from Guzzle\Http\Client

`$defaultHeaders`, `$requestFactory`, `$userAgent`

### Properties inherited from Guzzle\Common\AbstractHasDispatcher

`$eventDispatcher`