2025/06/05 - AWS Key Management Service - 13 updated api methods
Changes AWS KMS announces the support for on-demand rotation of symmetric-encryption KMS keys with imported key material (EXTERNAL origin).
{'KeyMetadata': {'CurrentKeyMaterialId': 'string'}}
Creates a unique customer managed KMS key in your Amazon Web Services account and Region. You can use a KMS key in cryptographic operations, such as encryption and signing. Some Amazon Web Services services let you use KMS keys that you create and manage to protect your service resources.
A KMS key is a logical representation of a cryptographic key. In addition to the key material used in cryptographic operations, a KMS key includes metadata, such as the key ID, key policy, creation date, description, and key state.
Use the parameters of CreateKey to specify the type of KMS key, the source of its key material, its key policy, description, tags, and other properties.
To create different types of KMS keys, use the following guidance:
Symmetric encryption KMS key
By default, CreateKey creates a symmetric encryption KMS key with key material that KMS generates. This is the basic and most widely used type of KMS key, and provides the best performance.
To create a symmetric encryption KMS key, you don't need to specify any parameters. The default value for KeySpec, SYMMETRIC_DEFAULT, the default value for KeyUsage, ENCRYPT_DECRYPT, and the default value for Origin, AWS_KMS, create a symmetric encryption KMS key with KMS key material.
If you need a key for basic encryption and decryption or you are creating a KMS key to protect your resources in an Amazon Web Services service, create a symmetric encryption KMS key. The key material in a symmetric encryption key never leaves KMS unencrypted. You can use a symmetric encryption KMS key to encrypt and decrypt data up to 4,096 bytes, but they are typically used to generate data keys and data keys pairs. For details, see GenerateDataKey and GenerateDataKeyPair.
Asymmetric KMS keys
To create an asymmetric KMS key, use the KeySpec parameter to specify the type of key material in the KMS key. Then, use the KeyUsage parameter to determine whether the KMS key will be used to encrypt and decrypt or sign and verify. You can't change these properties after the KMS key is created.
Asymmetric KMS keys contain an RSA key pair, Elliptic Curve (ECC) key pair, or an SM2 key pair (China Regions only). The private key in an asymmetric KMS key never leaves KMS unencrypted. However, you can use the GetPublicKey operation to download the public key so it can be used outside of KMS. Each KMS key can have only one key usage. KMS keys with RSA key pairs can be used to encrypt and decrypt data or sign and verify messages (but not both). KMS keys with NIST-recommended ECC key pairs can be used to sign and verify messages or derive shared secrets (but not both). KMS keys with ECC_SECG_P256K1 can be used only to sign and verify messages. KMS keys with SM2 key pairs (China Regions only) can be used to either encrypt and decrypt data, sign and verify messages, or derive shared secrets (you must choose one key usage type). For information about asymmetric KMS keys, see Asymmetric KMS keys in the Key Management Service Developer Guide.
HMAC KMS key
To create an HMAC KMS key, set the KeySpec parameter to a key spec value for HMAC KMS keys. Then set the KeyUsage parameter to GENERATE_VERIFY_MAC. You must set the key usage even though GENERATE_VERIFY_MAC is the only valid key usage value for HMAC KMS keys. You can't change these properties after the KMS key is created.
HMAC KMS keys are symmetric keys that never leave KMS unencrypted. You can use HMAC keys to generate ( GenerateMac) and verify ( VerifyMac) HMAC codes for messages up to 4096 bytes.
Multi-Region primary keys Imported key material
To create a multi-Region primary key in the local Amazon Web Services Region, use the MultiRegion parameter with a value of True. To create a multi-Region replica key, that is, a KMS key with the same key ID and key material as a primary key, but in a different Amazon Web Services Region, use the ReplicateKey operation. To change a replica key to a primary key, and its primary key to a replica key, use the UpdatePrimaryRegion operation.
You can create multi-Region KMS keys for all supported KMS key types: symmetric encryption KMS keys, HMAC KMS keys, asymmetric encryption KMS keys, and asymmetric signing KMS keys. You can also create multi-Region keys with imported key material. However, you can't create multi-Region keys in a custom key store.
This operation supports multi-Region keys, an KMS feature that lets you create multiple interoperable KMS keys in different Amazon Web Services Regions. Because these KMS keys have the same key ID, key material, and other metadata, you can use them interchangeably to encrypt data in one Amazon Web Services Region and decrypt it in a different Amazon Web Services Region without re-encrypting the data or making a cross-Region call. For more information about multi-Region keys, see Multi-Region keys in KMS in the Key Management Service Developer Guide.
To import your own key material into a KMS key, begin by creating a KMS key with no key material. To do this, use the Origin parameter of CreateKey with a value of EXTERNAL. Next, use GetParametersForImport operation to get a public key and import token. Use the wrapping public key to encrypt your key material. Then, use ImportKeyMaterial with your import token to import the key material. For step-by-step instructions, see Importing Key Material in the Key Management Service Developer Guide .
You can import key material into KMS keys of all supported KMS key types: symmetric encryption KMS keys, HMAC KMS keys, asymmetric encryption KMS keys, and asymmetric signing KMS keys. You can also create multi-Region keys with imported key material. However, you can't import key material into a KMS key in a custom key store.
To create a multi-Region primary key with imported key material, use the Origin parameter of CreateKey with a value of EXTERNAL and the MultiRegion parameter with a value of True. To create replicas of the multi-Region primary key, use the ReplicateKey operation. For instructions, see Importing key material step 1. For more information about multi-Region keys, see Multi-Region keys in KMS in the Key Management Service Developer Guide.
Custom key store
A custom key store lets you protect your Amazon Web Services resources using keys in a backing key store that you own and manage. When you request a cryptographic operation with a KMS key in a custom key store, the operation is performed in the backing key store using its cryptographic keys.
KMS supports CloudHSM key stores backed by an CloudHSM cluster and external key stores backed by an external key manager outside of Amazon Web Services. When you create a KMS key in an CloudHSM key store, KMS generates an encryption key in the CloudHSM cluster and associates it with the KMS key. When you create a KMS key in an external key store, you specify an existing encryption key in the external key manager.
Before you create a KMS key in a custom key store, the ConnectionState of the key store must be CONNECTED. To connect the custom key store, use the ConnectCustomKeyStore operation. To find the ConnectionState, use the DescribeCustomKeyStores operation.
To create a KMS key in a custom key store, use the CustomKeyStoreId. Use the default KeySpec value, SYMMETRIC_DEFAULT, and the default KeyUsage value, ENCRYPT_DECRYPT to create a symmetric encryption key. No other key type is supported in a custom key store.
To create a KMS key in an CloudHSM key store, use the Origin parameter with a value of AWS_CLOUDHSM. The CloudHSM cluster that is associated with the custom key store must have at least two active HSMs in different Availability Zones in the Amazon Web Services Region.
To create a KMS key in an external key store, use the Origin parameter with a value of EXTERNAL_KEY_STORE and an XksKeyId parameter that identifies an existing external key.
Cross-account use: No. You cannot use this operation to create a KMS key in a different Amazon Web Services account.
Required permissions: kms:CreateKey (IAM policy). To use the Tags parameter, kms:TagResource (IAM policy). For examples and information about related permissions, see Allow a user to create KMS keys in the Key Management Service Developer Guide.
Related operations:
DescribeKey
ListKeys
ScheduleKeyDeletion
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
See also: AWS API Documentation
Request Syntax
client.create_key(
Policy='string',
Description='string',
KeyUsage='SIGN_VERIFY'|'ENCRYPT_DECRYPT'|'GENERATE_VERIFY_MAC'|'KEY_AGREEMENT',
CustomerMasterKeySpec='RSA_2048'|'RSA_3072'|'RSA_4096'|'ECC_NIST_P256'|'ECC_NIST_P384'|'ECC_NIST_P521'|'ECC_SECG_P256K1'|'SYMMETRIC_DEFAULT'|'HMAC_224'|'HMAC_256'|'HMAC_384'|'HMAC_512'|'SM2',
KeySpec='RSA_2048'|'RSA_3072'|'RSA_4096'|'ECC_NIST_P256'|'ECC_NIST_P384'|'ECC_NIST_P521'|'ECC_SECG_P256K1'|'SYMMETRIC_DEFAULT'|'HMAC_224'|'HMAC_256'|'HMAC_384'|'HMAC_512'|'SM2',
Origin='AWS_KMS'|'EXTERNAL'|'AWS_CLOUDHSM'|'EXTERNAL_KEY_STORE',
CustomKeyStoreId='string',
BypassPolicyLockoutSafetyCheck=True|False,
Tags=[
{
'TagKey': 'string',
'TagValue': 'string'
},
],
MultiRegion=True|False,
XksKeyId='string'
)
string
The key policy to attach to the KMS key.
If you provide a key policy, it must meet the following criteria:
The key policy must allow the calling principal to make a subsequent PutKeyPolicy request on the KMS key. This reduces the risk that the KMS key becomes unmanageable. For more information, see Default key policy in the Key Management Service Developer Guide. (To omit this condition, set BypassPolicyLockoutSafetyCheck to true.)
Each statement in the key policy must contain one or more principals. The principals in the key policy must exist and be visible to KMS. When you create a new Amazon Web Services principal, you might need to enforce a delay before including the new principal in a key policy because the new principal might not be immediately visible to KMS. For more information, see Changes that I make are not always immediately visible in the Amazon Web Services Identity and Access Management User Guide.
If you do not provide a key policy, KMS attaches a default key policy to the KMS key. For more information, see Default key policy in the Key Management Service Developer Guide.
For help writing and formatting a JSON policy document, see the IAM JSON Policy Reference in the Identity and Access Management User Guide .
string
A description of the KMS key. Use a description that helps you decide whether the KMS key is appropriate for a task. The default value is an empty string (no description).
To set or change the description after the key is created, use UpdateKeyDescription.
string
Determines the cryptographic operations for which you can use the KMS key. The default value is ENCRYPT_DECRYPT. This parameter is optional when you are creating a symmetric encryption KMS key; otherwise, it is required. You can't change the KeyUsage value after the KMS key is created.
Select only one valid value.
For symmetric encryption KMS keys, omit the parameter or specify ENCRYPT_DECRYPT.
For HMAC KMS keys (symmetric), specify GENERATE_VERIFY_MAC.
For asymmetric KMS keys with RSA key pairs, specify ENCRYPT_DECRYPT or SIGN_VERIFY.
For asymmetric KMS keys with NIST-recommended elliptic curve key pairs, specify SIGN_VERIFY or KEY_AGREEMENT.
For asymmetric KMS keys with ECC_SECG_P256K1 key pairs specify SIGN_VERIFY.
For asymmetric KMS keys with SM2 key pairs (China Regions only), specify ENCRYPT_DECRYPT, SIGN_VERIFY, or KEY_AGREEMENT.
string
Instead, use the KeySpec parameter.
The KeySpec and CustomerMasterKeySpec parameters work the same way. Only the names differ. We recommend that you use KeySpec parameter in your code. However, to avoid breaking changes, KMS supports both parameters.
string
Specifies the type of KMS key to create. The default value, SYMMETRIC_DEFAULT, creates a KMS key with a 256-bit AES-GCM key that is used for encryption and decryption, except in China Regions, where it creates a 128-bit symmetric key that uses SM4 encryption. For a detailed description of all supported key specs, see Key spec reference in the Key Management Service Developer Guide .
The KeySpec determines whether the KMS key contains a symmetric key or an asymmetric key pair. It also determines the algorithms that the KMS key supports. You can't change the KeySpec after the KMS key is created. To further restrict the algorithms that can be used with the KMS key, use a condition key in its key policy or IAM policy. For more information, see kms:EncryptionAlgorithm, kms:MacAlgorithm, kms:KeyAgreementAlgorithm, or kms:SigningAlgorithm in the Key Management Service Developer Guide .
KMS supports the following key specs for KMS keys:
Symmetric encryption key (default)
SYMMETRIC_DEFAULT
HMAC keys (symmetric)
HMAC_224
HMAC_256
HMAC_384
HMAC_512
Asymmetric RSA key pairs (encryption and decryption -or- signing and verification)
RSA_2048
RSA_3072
RSA_4096
Asymmetric NIST-recommended elliptic curve key pairs (signing and verification -or- deriving shared secrets)
ECC_NIST_P256 (secp256r1)
ECC_NIST_P384 (secp384r1)
ECC_NIST_P521 (secp521r1)
Other asymmetric elliptic curve key pairs (signing and verification)
ECC_SECG_P256K1 (secp256k1), commonly used for cryptocurrencies.
SM2 key pairs (encryption and decryption -or- signing and verification -or- deriving shared secrets)
SM2 (China Regions only)
string
The source of the key material for the KMS key. You cannot change the origin after you create the KMS key. The default is AWS_KMS, which means that KMS creates the key material.
To create a KMS key with no key material (for imported key material), set this value to EXTERNAL. For more information about importing key material into KMS, see Importing Key Material in the Key Management Service Developer Guide. The EXTERNAL origin value is valid only for symmetric KMS keys.
To create a KMS key in an CloudHSM key store and create its key material in the associated CloudHSM cluster, set this value to AWS_CLOUDHSM. You must also use the CustomKeyStoreId parameter to identify the CloudHSM key store. The KeySpec value must be SYMMETRIC_DEFAULT.
To create a KMS key in an external key store, set this value to EXTERNAL_KEY_STORE. You must also use the CustomKeyStoreId parameter to identify the external key store and the XksKeyId parameter to identify the associated external key. The KeySpec value must be SYMMETRIC_DEFAULT.
string
Creates the KMS key in the specified custom key store. The ConnectionState of the custom key store must be CONNECTED. To find the CustomKeyStoreID and ConnectionState use the DescribeCustomKeyStores operation.
This parameter is valid only for symmetric encryption KMS keys in a single Region. You cannot create any other type of KMS key in a custom key store.
When you create a KMS key in an CloudHSM key store, KMS generates a non-exportable 256-bit symmetric key in its associated CloudHSM cluster and associates it with the KMS key. When you create a KMS key in an external key store, you must use the XksKeyId parameter to specify an external key that serves as key material for the KMS key.
boolean
Skips ("bypasses") the key policy lockout safety check. The default value is false.
Use this parameter only when you intend to prevent the principal that is making the request from making a subsequent PutKeyPolicy request on the KMS key.
list
Assigns one or more tags to the KMS key. Use this parameter to tag the KMS key when it is created. To tag an existing KMS key, use the TagResource operation.
To use this parameter, you must have kms:TagResource permission in an IAM policy.
Each tag consists of a tag key and a tag value. Both the tag key and the tag value are required, but the tag value can be an empty (null) string. You cannot have more than one tag on a KMS key with the same tag key. If you specify an existing tag key with a different tag value, KMS replaces the current tag value with the specified one.
When you add tags to an Amazon Web Services resource, Amazon Web Services generates a cost allocation report with usage and costs aggregated by tags. Tags can also be used to control access to a KMS key. For details, see Tags in KMS.
(dict) --
A key-value pair. A tag consists of a tag key and a tag value. Tag keys and tag values are both required, but tag values can be empty (null) strings.
For information about the rules that apply to tag keys and tag values, see User-Defined Tag Restrictions in the Amazon Web Services Billing and Cost Management User Guide.
TagKey (string) -- [REQUIRED]
The key of the tag.
TagValue (string) -- [REQUIRED]
The value of the tag.
boolean
Creates a multi-Region primary key that you can replicate into other Amazon Web Services Regions. You cannot change this value after you create the KMS key.
For a multi-Region key, set this parameter to True. For a single-Region KMS key, omit this parameter or set it to False. The default value is False.
This operation supports multi-Region keys, an KMS feature that lets you create multiple interoperable KMS keys in different Amazon Web Services Regions. Because these KMS keys have the same key ID, key material, and other metadata, you can use them interchangeably to encrypt data in one Amazon Web Services Region and decrypt it in a different Amazon Web Services Region without re-encrypting the data or making a cross-Region call. For more information about multi-Region keys, see Multi-Region keys in KMS in the Key Management Service Developer Guide.
This value creates a primary key, not a replica. To create a replica key, use the ReplicateKey operation.
You can create a symmetric or asymmetric multi-Region key, and you can create a multi-Region key with imported key material. However, you cannot create a multi-Region key in a custom key store.
string
Identifies the external key that serves as key material for the KMS key in an external key store. Specify the ID that the external key store proxy uses to refer to the external key. For help, see the documentation for your external key store proxy.
This parameter is required for a KMS key with an Origin value of EXTERNAL_KEY_STORE. It is not valid for KMS keys with any other Origin value.
The external key must be an existing 256-bit AES symmetric encryption key hosted outside of Amazon Web Services in an external key manager associated with the external key store specified by the CustomKeyStoreId parameter. This key must be enabled and configured to perform encryption and decryption. Each KMS key in an external key store must use a different external key. For details, see Requirements for a KMS key in an external key store in the Key Management Service Developer Guide.
Each KMS key in an external key store is associated two backing keys. One is key material that KMS generates. The other is the external key specified by this parameter. When you use the KMS key in an external key store to encrypt data, the encryption operation is performed first by KMS using the KMS key material, and then by the external key manager using the specified external key, a process known as double encryption. For details, see Double encryption in the Key Management Service Developer Guide.
dict
Response Syntax
{
'KeyMetadata': {
'AWSAccountId': 'string',
'KeyId': 'string',
'Arn': 'string',
'CreationDate': datetime(2015, 1, 1),
'Enabled': True|False,
'Description': 'string',
'KeyUsage': 'SIGN_VERIFY'|'ENCRYPT_DECRYPT'|'GENERATE_VERIFY_MAC'|'KEY_AGREEMENT',
'KeyState': 'Creating'|'Enabled'|'Disabled'|'PendingDeletion'|'PendingImport'|'PendingReplicaDeletion'|'Unavailable'|'Updating',
'DeletionDate': datetime(2015, 1, 1),
'ValidTo': datetime(2015, 1, 1),
'Origin': 'AWS_KMS'|'EXTERNAL'|'AWS_CLOUDHSM'|'EXTERNAL_KEY_STORE',
'CustomKeyStoreId': 'string',
'CloudHsmClusterId': 'string',
'ExpirationModel': 'KEY_MATERIAL_EXPIRES'|'KEY_MATERIAL_DOES_NOT_EXPIRE',
'KeyManager': 'AWS'|'CUSTOMER',
'CustomerMasterKeySpec': 'RSA_2048'|'RSA_3072'|'RSA_4096'|'ECC_NIST_P256'|'ECC_NIST_P384'|'ECC_NIST_P521'|'ECC_SECG_P256K1'|'SYMMETRIC_DEFAULT'|'HMAC_224'|'HMAC_256'|'HMAC_384'|'HMAC_512'|'SM2',
'KeySpec': 'RSA_2048'|'RSA_3072'|'RSA_4096'|'ECC_NIST_P256'|'ECC_NIST_P384'|'ECC_NIST_P521'|'ECC_SECG_P256K1'|'SYMMETRIC_DEFAULT'|'HMAC_224'|'HMAC_256'|'HMAC_384'|'HMAC_512'|'SM2',
'EncryptionAlgorithms': [
'SYMMETRIC_DEFAULT'|'RSAES_OAEP_SHA_1'|'RSAES_OAEP_SHA_256'|'SM2PKE',
],
'SigningAlgorithms': [
'RSASSA_PSS_SHA_256'|'RSASSA_PSS_SHA_384'|'RSASSA_PSS_SHA_512'|'RSASSA_PKCS1_V1_5_SHA_256'|'RSASSA_PKCS1_V1_5_SHA_384'|'RSASSA_PKCS1_V1_5_SHA_512'|'ECDSA_SHA_256'|'ECDSA_SHA_384'|'ECDSA_SHA_512'|'SM2DSA',
],
'KeyAgreementAlgorithms': [
'ECDH',
],
'MultiRegion': True|False,
'MultiRegionConfiguration': {
'MultiRegionKeyType': 'PRIMARY'|'REPLICA',
'PrimaryKey': {
'Arn': 'string',
'Region': 'string'
},
'ReplicaKeys': [
{
'Arn': 'string',
'Region': 'string'
},
]
},
'PendingDeletionWindowInDays': 123,
'MacAlgorithms': [
'HMAC_SHA_224'|'HMAC_SHA_256'|'HMAC_SHA_384'|'HMAC_SHA_512',
],
'XksKeyConfiguration': {
'Id': 'string'
},
'CurrentKeyMaterialId': 'string'
}
}
Response Structure
(dict) --
KeyMetadata (dict) --
Metadata associated with the KMS key.
AWSAccountId (string) --
The twelve-digit account ID of the Amazon Web Services account that owns the KMS key.
KeyId (string) --
The globally unique identifier for the KMS key.
Arn (string) --
The Amazon Resource Name (ARN) of the KMS key. For examples, see Key Management Service (KMS) in the Example ARNs section of the Amazon Web Services General Reference.
CreationDate (datetime) --
The date and time when the KMS key was created.
Enabled (boolean) --
Specifies whether the KMS key is enabled. When KeyState is Enabled this value is true, otherwise it is false.
Description (string) --
The description of the KMS key.
KeyUsage (string) --
The cryptographic operations for which you can use the KMS key.
KeyState (string) --
The current status of the KMS key.
For more information about how key state affects the use of a KMS key, see Key states of KMS keys in the Key Management Service Developer Guide.
DeletionDate (datetime) --
The date and time after which KMS deletes this KMS key. This value is present only when the KMS key is scheduled for deletion, that is, when its KeyState is PendingDeletion.
When the primary key in a multi-Region key is scheduled for deletion but still has replica keys, its key state is PendingReplicaDeletion and the length of its waiting period is displayed in the PendingDeletionWindowInDays field.
ValidTo (datetime) --
The earliest time at which any imported key material permanently associated with this KMS key expires. When a key material expires, KMS deletes the key material and the KMS key becomes unusable. This value is present only for KMS keys whose Origin is EXTERNAL and the ExpirationModel is KEY_MATERIAL_EXPIRES, otherwise this value is omitted.
Origin (string) --
The source of the key material for the KMS key. When this value is AWS_KMS, KMS created the key material. When this value is EXTERNAL, the key material was imported or the KMS key doesn't have any key material. When this value is AWS_CLOUDHSM, the key material was created in the CloudHSM cluster associated with a custom key store.
CustomKeyStoreId (string) --
A unique identifier for the custom key store that contains the KMS key. This field is present only when the KMS key is created in a custom key store.
CloudHsmClusterId (string) --
The cluster ID of the CloudHSM cluster that contains the key material for the KMS key. When you create a KMS key in an CloudHSM custom key store, KMS creates the key material for the KMS key in the associated CloudHSM cluster. This field is present only when the KMS key is created in an CloudHSM key store.
ExpirationModel (string) --
Specifies whether the KMS key's key material expires. This value is present only when Origin is EXTERNAL, otherwise this value is omitted.
KeyManager (string) --
The manager of the KMS key. KMS keys in your Amazon Web Services account are either customer managed or Amazon Web Services managed. For more information about the difference, see KMS keys in the Key Management Service Developer Guide.
CustomerMasterKeySpec (string) --
Instead, use the KeySpec field.
The KeySpec and CustomerMasterKeySpec fields have the same value. We recommend that you use the KeySpec field in your code. However, to avoid breaking changes, KMS supports both fields.
KeySpec (string) --
Describes the type of key material in the KMS key.
EncryptionAlgorithms (list) --
The encryption algorithms that the KMS key supports. You cannot use the KMS key with other encryption algorithms within KMS.
This value is present only when the KeyUsage of the KMS key is ENCRYPT_DECRYPT.
(string) --
SigningAlgorithms (list) --
The signing algorithms that the KMS key supports. You cannot use the KMS key with other signing algorithms within KMS.
This field appears only when the KeyUsage of the KMS key is SIGN_VERIFY.
(string) --
KeyAgreementAlgorithms (list) --
The key agreement algorithm used to derive a shared secret.
(string) --
MultiRegion (boolean) --
Indicates whether the KMS key is a multi-Region ( True) or regional ( False) key. This value is True for multi-Region primary and replica keys and False for regional KMS keys.
For more information about multi-Region keys, see Multi-Region keys in KMS in the Key Management Service Developer Guide.
MultiRegionConfiguration (dict) --
Lists the primary and replica keys in same multi-Region key. This field is present only when the value of the MultiRegion field is True.
For more information about any listed KMS key, use the DescribeKey operation.
MultiRegionKeyType indicates whether the KMS key is a PRIMARY or REPLICA key.
PrimaryKey displays the key ARN and Region of the primary key. This field displays the current KMS key if it is the primary key.
ReplicaKeys displays the key ARNs and Regions of all replica keys. This field includes the current KMS key if it is a replica key.
MultiRegionKeyType (string) --
Indicates whether the KMS key is a PRIMARY or REPLICA key.
PrimaryKey (dict) --
Displays the key ARN and Region of the primary key. This field includes the current KMS key if it is the primary key.
Arn (string) --
Displays the key ARN of a primary or replica key of a multi-Region key.
Region (string) --
Displays the Amazon Web Services Region of a primary or replica key in a multi-Region key.
ReplicaKeys (list) --
displays the key ARNs and Regions of all replica keys. This field includes the current KMS key if it is a replica key.
(dict) --
Describes the primary or replica key in a multi-Region key.
Arn (string) --
Displays the key ARN of a primary or replica key of a multi-Region key.
Region (string) --
Displays the Amazon Web Services Region of a primary or replica key in a multi-Region key.
PendingDeletionWindowInDays (integer) --
The waiting period before the primary key in a multi-Region key is deleted. This waiting period begins when the last of its replica keys is deleted. This value is present only when the KeyState of the KMS key is PendingReplicaDeletion. That indicates that the KMS key is the primary key in a multi-Region key, it is scheduled for deletion, and it still has existing replica keys.
When a single-Region KMS key or a multi-Region replica key is scheduled for deletion, its deletion date is displayed in the DeletionDate field. However, when the primary key in a multi-Region key is scheduled for deletion, its waiting period doesn't begin until all of its replica keys are deleted. This value displays that waiting period. When the last replica key in the multi-Region key is deleted, the KeyState of the scheduled primary key changes from PendingReplicaDeletion to PendingDeletion and the deletion date appears in the DeletionDate field.
MacAlgorithms (list) --
The message authentication code (MAC) algorithm that the HMAC KMS key supports.
This value is present only when the KeyUsage of the KMS key is GENERATE_VERIFY_MAC.
(string) --
XksKeyConfiguration (dict) --
Information about the external key that is associated with a KMS key in an external key store.
For more information, see External key in the Key Management Service Developer Guide.
Id (string) --
The ID of the external key in its external key manager. This is the ID that the external key store proxy uses to identify the external key.
CurrentKeyMaterialId (string) --
Identifies the current key material. This value is present for symmetric encryption keys with AWS_KMS origin and single-Region, symmetric encryption keys with EXTERNAL origin. These KMS keys support automatic or on-demand key rotation and can have multiple key materials associated with them. KMS uses the current key material for both encryption and decryption, and the non-current key material for decryption operations only.
{'KeyMaterialId': 'string'}
Decrypts ciphertext that was encrypted by a KMS key using any of the following operations:
Encrypt
GenerateDataKey
GenerateDataKeyPair
GenerateDataKeyWithoutPlaintext
GenerateDataKeyPairWithoutPlaintext
You can use this operation to decrypt ciphertext that was encrypted under a symmetric encryption KMS key or an asymmetric encryption KMS key. When the KMS key is asymmetric, you must specify the KMS key and the encryption algorithm that was used to encrypt the ciphertext. For information about asymmetric KMS keys, see Asymmetric KMS keys in the Key Management Service Developer Guide.
The Decrypt operation also decrypts ciphertext that was encrypted outside of KMS by the public key in an KMS asymmetric KMS key. However, it cannot decrypt symmetric ciphertext produced by other libraries, such as the Amazon Web Services Encryption SDK or Amazon S3 client-side encryption. These libraries return a ciphertext format that is incompatible with KMS.
If the ciphertext was encrypted under a symmetric encryption KMS key, the KeyId parameter is optional. KMS can get this information from metadata that it adds to the symmetric ciphertext blob. This feature adds durability to your implementation by ensuring that authorized users can decrypt ciphertext decades after it was encrypted, even if they've lost track of the key ID. However, specifying the KMS key is always recommended as a best practice. When you use the KeyId parameter to specify a KMS key, KMS only uses the KMS key you specify. If the ciphertext was encrypted under a different KMS key, the Decrypt operation fails. This practice ensures that you use the KMS key that you intend.
Whenever possible, use key policies to give users permission to call the Decrypt operation on a particular KMS key, instead of using IAM policies. Otherwise, you might create an IAM policy that gives the user Decrypt permission on all KMS keys. This user could decrypt ciphertext that was encrypted by KMS keys in other accounts if the key policy for the cross-account KMS key permits it. If you must use an IAM policy for Decrypt permissions, limit the user to particular KMS keys or particular trusted accounts. For details, see Best practices for IAM policies in the Key Management Service Developer Guide.
Decrypt also supports Amazon Web Services Nitro Enclaves, which provide an isolated compute environment in Amazon EC2. To call Decrypt for a Nitro enclave, use the Amazon Web Services Nitro Enclaves SDK or any Amazon Web Services SDK. Use the Recipient parameter to provide the attestation document for the enclave. Instead of the plaintext data, the response includes the plaintext data encrypted with the public key from the attestation document ( CiphertextForRecipient). For information about the interaction between KMS and Amazon Web Services Nitro Enclaves, see How Amazon Web Services Nitro Enclaves uses KMS in the Key Management Service Developer Guide.
The KMS key that you use for this operation must be in a compatible key state. For details, see Key states of KMS keys in the Key Management Service Developer Guide.
Cross-account use: Yes. If you use the KeyId parameter to identify a KMS key in a different Amazon Web Services account, specify the key ARN or the alias ARN of the KMS key.
Required permissions: kms:Decrypt (key policy)
Related operations:
Encrypt
GenerateDataKey
GenerateDataKeyPair
ReEncrypt
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
See also: AWS API Documentation
Request Syntax
client.decrypt(
CiphertextBlob=b'bytes',
EncryptionContext={
'string': 'string'
},
GrantTokens=[
'string',
],
KeyId='string',
EncryptionAlgorithm='SYMMETRIC_DEFAULT'|'RSAES_OAEP_SHA_1'|'RSAES_OAEP_SHA_256'|'SM2PKE',
Recipient={
'KeyEncryptionAlgorithm': 'RSAES_OAEP_SHA_256',
'AttestationDocument': b'bytes'
},
DryRun=True|False
)
bytes
[REQUIRED]
Ciphertext to be decrypted. The blob includes metadata.
dict
Specifies the encryption context to use when decrypting the data. An encryption context is valid only for cryptographic operations with a symmetric encryption KMS key. The standard asymmetric encryption algorithms and HMAC algorithms that KMS uses do not support an encryption context.
An encryption context is a collection of non-secret key-value pairs that represent additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is supported only on operations with symmetric encryption KMS keys. On operations with symmetric encryption KMS keys, an encryption context is optional, but it is strongly recommended.
For more information, see Encryption context in the Key Management Service Developer Guide.
(string) --
(string) --
list
A list of grant tokens.
Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.
(string) --
string
Specifies the KMS key that KMS uses to decrypt the ciphertext.
Enter a key ID of the KMS key that was used to encrypt the ciphertext. If you identify a different KMS key, the Decrypt operation throws an IncorrectKeyException.
This parameter is required only when the ciphertext was encrypted under an asymmetric KMS key. If you used a symmetric encryption KMS key, KMS can get the KMS key from metadata that it adds to the symmetric ciphertext blob. However, it is always recommended as a best practice. This practice ensures that you use the KMS key that you intend.
To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.
For example:
Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab
Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab
Alias name: alias/ExampleAlias
Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias
To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.
string
Specifies the encryption algorithm that will be used to decrypt the ciphertext. Specify the same algorithm that was used to encrypt the data. If you specify a different algorithm, the Decrypt operation fails.
This parameter is required only when the ciphertext was encrypted under an asymmetric KMS key. The default value, SYMMETRIC_DEFAULT, represents the only supported algorithm that is valid for symmetric encryption KMS keys.
dict
A signed attestation document from an Amazon Web Services Nitro enclave and the encryption algorithm to use with the enclave's public key. The only valid encryption algorithm is RSAES_OAEP_SHA_256.
This parameter only supports attestation documents for Amazon Web Services Nitro Enclaves. To include this parameter, use the Amazon Web Services Nitro Enclaves SDK or any Amazon Web Services SDK.
When you use this parameter, instead of returning the plaintext data, KMS encrypts the plaintext data with the public key in the attestation document, and returns the resulting ciphertext in the CiphertextForRecipient field in the response. This ciphertext can be decrypted only with the private key in the enclave. The Plaintext field in the response is null or empty.
For information about the interaction between KMS and Amazon Web Services Nitro Enclaves, see How Amazon Web Services Nitro Enclaves uses KMS in the Key Management Service Developer Guide.
KeyEncryptionAlgorithm (string) --
The encryption algorithm that KMS should use with the public key for an Amazon Web Services Nitro Enclave to encrypt plaintext values for the response. The only valid value is RSAES_OAEP_SHA_256.
AttestationDocument (bytes) --
The attestation document for an Amazon Web Services Nitro Enclave. This document includes the enclave's public key.
boolean
Checks if your request will succeed. DryRun is an optional parameter.
To learn more about how to use this parameter, see Testing your permissions in the Key Management Service Developer Guide.
dict
Response Syntax
{
'KeyId': 'string',
'Plaintext': b'bytes',
'EncryptionAlgorithm': 'SYMMETRIC_DEFAULT'|'RSAES_OAEP_SHA_1'|'RSAES_OAEP_SHA_256'|'SM2PKE',
'CiphertextForRecipient': b'bytes',
'KeyMaterialId': 'string'
}
Response Structure
(dict) --
KeyId (string) --
The Amazon Resource Name ( key ARN) of the KMS key that was used to decrypt the ciphertext.
Plaintext (bytes) --
Decrypted plaintext data. When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.
If the response includes the CiphertextForRecipient field, the Plaintext field is null or empty.
EncryptionAlgorithm (string) --
The encryption algorithm that was used to decrypt the ciphertext.
CiphertextForRecipient (bytes) --
The plaintext data encrypted with the public key in the attestation document.
This field is included in the response only when the Recipient parameter in the request includes a valid attestation document from an Amazon Web Services Nitro enclave. For information about the interaction between KMS and Amazon Web Services Nitro Enclaves, see How Amazon Web Services Nitro Enclaves uses KMS in the Key Management Service Developer Guide.
KeyMaterialId (string) --
The identifier of the key material used to decrypt the ciphertext. This field is present only when the operation uses a symmetric encryption KMS key.
{'KeyMaterialId': 'string'}
Deletes key material that was previously imported. This operation makes the specified KMS key temporarily unusable. To restore the usability of the KMS key, reimport the same key material. For more information about importing key material into KMS, see Importing Key Material in the Key Management Service Developer Guide.
When the specified KMS key is in the PendingDeletion state, this operation does not change the KMS key's state. Otherwise, it changes the KMS key's state to PendingImport.
The KMS key that you use for this operation must be in a compatible key state. For details, see Key states of KMS keys in the Key Management Service Developer Guide.
Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.
Required permissions: kms:DeleteImportedKeyMaterial (key policy)
Related operations:
GetParametersForImport
ListKeyRotations
ImportKeyMaterial
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
See also: AWS API Documentation
Request Syntax
client.delete_imported_key_material(
KeyId='string',
KeyMaterialId='string'
)
string
[REQUIRED]
Identifies the KMS key from which you are deleting imported key material. The Origin of the KMS key must be EXTERNAL.
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.
string
Identifies the imported key material you are deleting.
To get the list of key material IDs associated with a KMS key, use ListKeyRotations.
dict
Response Syntax
{
'KeyId': 'string',
'KeyMaterialId': 'string'
}
Response Structure
(dict) --
KeyId (string) --
The Amazon Resource Name ( key ARN) of the KMS key from which the key material was deleted.
KeyMaterialId (string) --
Identifies the deleted key material.
{'KeyMetadata': {'CurrentKeyMaterialId': 'string'}}
Provides detailed information about a KMS key. You can run DescribeKey on a customer managed key or an Amazon Web Services managed key.
This detailed information includes the key ARN, creation date (and deletion date, if applicable), the key state, and the origin and expiration date (if any) of the key material. It includes fields, like KeySpec, that help you distinguish different types of KMS keys. It also displays the key usage (encryption, signing, or generating and verifying MACs) and the algorithms that the KMS key supports.
For multi-Region keys, DescribeKey displays the primary key and all related replica keys. For KMS keys in CloudHSM key stores, it includes information about the key store, such as the key store ID and the CloudHSM cluster ID. For KMS keys in external key stores, it includes the custom key store ID and the ID of the external key.
DescribeKey does not return the following information:
Aliases associated with the KMS key. To get this information, use ListAliases.
Whether automatic key rotation is enabled on the KMS key. To get this information, use GetKeyRotationStatus. Also, some key states prevent a KMS key from being automatically rotated. For details, see How key rotation works in the Key Management Service Developer Guide.
Tags on the KMS key. To get this information, use ListResourceTags.
Key policies and grants on the KMS key. To get this information, use GetKeyPolicy and ListGrants.
In general, DescribeKey is a non-mutating operation. It returns data about KMS keys, but doesn't change them. However, Amazon Web Services services use DescribeKey to create Amazon Web Services managed keys from a predefined Amazon Web Services alias with no key ID.
Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.
Required permissions: kms:DescribeKey (key policy)
Related operations:
GetKeyPolicy
GetKeyRotationStatus
ListAliases
ListGrants
ListKeys
ListResourceTags
ListRetirableGrants
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
See also: AWS API Documentation
Request Syntax
client.describe_key(
KeyId='string',
GrantTokens=[
'string',
]
)
string
[REQUIRED]
Describes the specified KMS key.
If you specify a predefined Amazon Web Services alias (an Amazon Web Services alias with no key ID), KMS associates the alias with an Amazon Web Services managed key and returns its KeyId and Arn in the response.
To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.
For example:
Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab
Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab
Alias name: alias/ExampleAlias
Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias
To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.
list
A list of grant tokens.
Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.
(string) --
dict
Response Syntax
{
'KeyMetadata': {
'AWSAccountId': 'string',
'KeyId': 'string',
'Arn': 'string',
'CreationDate': datetime(2015, 1, 1),
'Enabled': True|False,
'Description': 'string',
'KeyUsage': 'SIGN_VERIFY'|'ENCRYPT_DECRYPT'|'GENERATE_VERIFY_MAC'|'KEY_AGREEMENT',
'KeyState': 'Creating'|'Enabled'|'Disabled'|'PendingDeletion'|'PendingImport'|'PendingReplicaDeletion'|'Unavailable'|'Updating',
'DeletionDate': datetime(2015, 1, 1),
'ValidTo': datetime(2015, 1, 1),
'Origin': 'AWS_KMS'|'EXTERNAL'|'AWS_CLOUDHSM'|'EXTERNAL_KEY_STORE',
'CustomKeyStoreId': 'string',
'CloudHsmClusterId': 'string',
'ExpirationModel': 'KEY_MATERIAL_EXPIRES'|'KEY_MATERIAL_DOES_NOT_EXPIRE',
'KeyManager': 'AWS'|'CUSTOMER',
'CustomerMasterKeySpec': 'RSA_2048'|'RSA_3072'|'RSA_4096'|'ECC_NIST_P256'|'ECC_NIST_P384'|'ECC_NIST_P521'|'ECC_SECG_P256K1'|'SYMMETRIC_DEFAULT'|'HMAC_224'|'HMAC_256'|'HMAC_384'|'HMAC_512'|'SM2',
'KeySpec': 'RSA_2048'|'RSA_3072'|'RSA_4096'|'ECC_NIST_P256'|'ECC_NIST_P384'|'ECC_NIST_P521'|'ECC_SECG_P256K1'|'SYMMETRIC_DEFAULT'|'HMAC_224'|'HMAC_256'|'HMAC_384'|'HMAC_512'|'SM2',
'EncryptionAlgorithms': [
'SYMMETRIC_DEFAULT'|'RSAES_OAEP_SHA_1'|'RSAES_OAEP_SHA_256'|'SM2PKE',
],
'SigningAlgorithms': [
'RSASSA_PSS_SHA_256'|'RSASSA_PSS_SHA_384'|'RSASSA_PSS_SHA_512'|'RSASSA_PKCS1_V1_5_SHA_256'|'RSASSA_PKCS1_V1_5_SHA_384'|'RSASSA_PKCS1_V1_5_SHA_512'|'ECDSA_SHA_256'|'ECDSA_SHA_384'|'ECDSA_SHA_512'|'SM2DSA',
],
'KeyAgreementAlgorithms': [
'ECDH',
],
'MultiRegion': True|False,
'MultiRegionConfiguration': {
'MultiRegionKeyType': 'PRIMARY'|'REPLICA',
'PrimaryKey': {
'Arn': 'string',
'Region': 'string'
},
'ReplicaKeys': [
{
'Arn': 'string',
'Region': 'string'
},
]
},
'PendingDeletionWindowInDays': 123,
'MacAlgorithms': [
'HMAC_SHA_224'|'HMAC_SHA_256'|'HMAC_SHA_384'|'HMAC_SHA_512',
],
'XksKeyConfiguration': {
'Id': 'string'
},
'CurrentKeyMaterialId': 'string'
}
}
Response Structure
(dict) --
KeyMetadata (dict) --
Metadata associated with the key.
AWSAccountId (string) --
The twelve-digit account ID of the Amazon Web Services account that owns the KMS key.
KeyId (string) --
The globally unique identifier for the KMS key.
Arn (string) --
The Amazon Resource Name (ARN) of the KMS key. For examples, see Key Management Service (KMS) in the Example ARNs section of the Amazon Web Services General Reference.
CreationDate (datetime) --
The date and time when the KMS key was created.
Enabled (boolean) --
Specifies whether the KMS key is enabled. When KeyState is Enabled this value is true, otherwise it is false.
Description (string) --
The description of the KMS key.
KeyUsage (string) --
The cryptographic operations for which you can use the KMS key.
KeyState (string) --
The current status of the KMS key.
For more information about how key state affects the use of a KMS key, see Key states of KMS keys in the Key Management Service Developer Guide.
DeletionDate (datetime) --
The date and time after which KMS deletes this KMS key. This value is present only when the KMS key is scheduled for deletion, that is, when its KeyState is PendingDeletion.
When the primary key in a multi-Region key is scheduled for deletion but still has replica keys, its key state is PendingReplicaDeletion and the length of its waiting period is displayed in the PendingDeletionWindowInDays field.
ValidTo (datetime) --
The earliest time at which any imported key material permanently associated with this KMS key expires. When a key material expires, KMS deletes the key material and the KMS key becomes unusable. This value is present only for KMS keys whose Origin is EXTERNAL and the ExpirationModel is KEY_MATERIAL_EXPIRES, otherwise this value is omitted.
Origin (string) --
The source of the key material for the KMS key. When this value is AWS_KMS, KMS created the key material. When this value is EXTERNAL, the key material was imported or the KMS key doesn't have any key material. When this value is AWS_CLOUDHSM, the key material was created in the CloudHSM cluster associated with a custom key store.
CustomKeyStoreId (string) --
A unique identifier for the custom key store that contains the KMS key. This field is present only when the KMS key is created in a custom key store.
CloudHsmClusterId (string) --
The cluster ID of the CloudHSM cluster that contains the key material for the KMS key. When you create a KMS key in an CloudHSM custom key store, KMS creates the key material for the KMS key in the associated CloudHSM cluster. This field is present only when the KMS key is created in an CloudHSM key store.
ExpirationModel (string) --
Specifies whether the KMS key's key material expires. This value is present only when Origin is EXTERNAL, otherwise this value is omitted.
KeyManager (string) --
The manager of the KMS key. KMS keys in your Amazon Web Services account are either customer managed or Amazon Web Services managed. For more information about the difference, see KMS keys in the Key Management Service Developer Guide.
CustomerMasterKeySpec (string) --
Instead, use the KeySpec field.
The KeySpec and CustomerMasterKeySpec fields have the same value. We recommend that you use the KeySpec field in your code. However, to avoid breaking changes, KMS supports both fields.
KeySpec (string) --
Describes the type of key material in the KMS key.
EncryptionAlgorithms (list) --
The encryption algorithms that the KMS key supports. You cannot use the KMS key with other encryption algorithms within KMS.
This value is present only when the KeyUsage of the KMS key is ENCRYPT_DECRYPT.
(string) --
SigningAlgorithms (list) --
The signing algorithms that the KMS key supports. You cannot use the KMS key with other signing algorithms within KMS.
This field appears only when the KeyUsage of the KMS key is SIGN_VERIFY.
(string) --
KeyAgreementAlgorithms (list) --
The key agreement algorithm used to derive a shared secret.
(string) --
MultiRegion (boolean) --
Indicates whether the KMS key is a multi-Region ( True) or regional ( False) key. This value is True for multi-Region primary and replica keys and False for regional KMS keys.
For more information about multi-Region keys, see Multi-Region keys in KMS in the Key Management Service Developer Guide.
MultiRegionConfiguration (dict) --
Lists the primary and replica keys in same multi-Region key. This field is present only when the value of the MultiRegion field is True.
For more information about any listed KMS key, use the DescribeKey operation.
MultiRegionKeyType indicates whether the KMS key is a PRIMARY or REPLICA key.
PrimaryKey displays the key ARN and Region of the primary key. This field displays the current KMS key if it is the primary key.
ReplicaKeys displays the key ARNs and Regions of all replica keys. This field includes the current KMS key if it is a replica key.
MultiRegionKeyType (string) --
Indicates whether the KMS key is a PRIMARY or REPLICA key.
PrimaryKey (dict) --
Displays the key ARN and Region of the primary key. This field includes the current KMS key if it is the primary key.
Arn (string) --
Displays the key ARN of a primary or replica key of a multi-Region key.
Region (string) --
Displays the Amazon Web Services Region of a primary or replica key in a multi-Region key.
ReplicaKeys (list) --
displays the key ARNs and Regions of all replica keys. This field includes the current KMS key if it is a replica key.
(dict) --
Describes the primary or replica key in a multi-Region key.
Arn (string) --
Displays the key ARN of a primary or replica key of a multi-Region key.
Region (string) --
Displays the Amazon Web Services Region of a primary or replica key in a multi-Region key.
PendingDeletionWindowInDays (integer) --
The waiting period before the primary key in a multi-Region key is deleted. This waiting period begins when the last of its replica keys is deleted. This value is present only when the KeyState of the KMS key is PendingReplicaDeletion. That indicates that the KMS key is the primary key in a multi-Region key, it is scheduled for deletion, and it still has existing replica keys.
When a single-Region KMS key or a multi-Region replica key is scheduled for deletion, its deletion date is displayed in the DeletionDate field. However, when the primary key in a multi-Region key is scheduled for deletion, its waiting period doesn't begin until all of its replica keys are deleted. This value displays that waiting period. When the last replica key in the multi-Region key is deleted, the KeyState of the scheduled primary key changes from PendingReplicaDeletion to PendingDeletion and the deletion date appears in the DeletionDate field.
MacAlgorithms (list) --
The message authentication code (MAC) algorithm that the HMAC KMS key supports.
This value is present only when the KeyUsage of the KMS key is GENERATE_VERIFY_MAC.
(string) --
XksKeyConfiguration (dict) --
Information about the external key that is associated with a KMS key in an external key store.
For more information, see External key in the Key Management Service Developer Guide.
Id (string) --
The ID of the external key in its external key manager. This is the ID that the external key store proxy uses to identify the external key.
CurrentKeyMaterialId (string) --
Identifies the current key material. This value is present for symmetric encryption keys with AWS_KMS origin and single-Region, symmetric encryption keys with EXTERNAL origin. These KMS keys support automatic or on-demand key rotation and can have multiple key materials associated with them. KMS uses the current key material for both encryption and decryption, and the non-current key material for decryption operations only.
{'KeyMaterialId': 'string'}
Encrypts plaintext of up to 4,096 bytes using a KMS key. You can use a symmetric or asymmetric KMS key with a KeyUsage of ENCRYPT_DECRYPT.
You can use this operation to encrypt small amounts of arbitrary data, such as a personal identifier or database password, or other sensitive information. You don't need to use the Encrypt operation to encrypt a data key. The GenerateDataKey and GenerateDataKeyPair operations return a plaintext data key and an encrypted copy of that data key.
If you use a symmetric encryption KMS key, you can use an encryption context to add additional security to your encryption operation. If you specify an EncryptionContext when encrypting data, you must specify the same encryption context (a case-sensitive exact match) when decrypting the data. Otherwise, the request to decrypt fails with an InvalidCiphertextException. For more information, see Encryption Context in the Key Management Service Developer Guide.
If you specify an asymmetric KMS key, you must also specify the encryption algorithm. The algorithm must be compatible with the KMS key spec.
The maximum size of the data that you can encrypt varies with the type of KMS key and the encryption algorithm that you choose.
Symmetric encryption KMS keys
SYMMETRIC_DEFAULT: 4096 bytes
RSA_2048
RSAES_OAEP_SHA_1: 214 bytes
RSAES_OAEP_SHA_256: 190 bytes
RSA_3072
RSAES_OAEP_SHA_1: 342 bytes
RSAES_OAEP_SHA_256: 318 bytes
RSA_4096
RSAES_OAEP_SHA_1: 470 bytes
RSAES_OAEP_SHA_256: 446 bytes
SM2PKE: 1024 bytes (China Regions only)
The KMS key that you use for this operation must be in a compatible key state. For details, see Key states of KMS keys in the Key Management Service Developer Guide.
Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.
Required permissions: kms:Encrypt (key policy)
Related operations:
Decrypt
GenerateDataKey
GenerateDataKeyPair
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
See also: AWS API Documentation
Request Syntax
client.encrypt(
KeyId='string',
Plaintext=b'bytes',
EncryptionContext={
'string': 'string'
},
GrantTokens=[
'string',
],
EncryptionAlgorithm='SYMMETRIC_DEFAULT'|'RSAES_OAEP_SHA_1'|'RSAES_OAEP_SHA_256'|'SM2PKE',
DryRun=True|False
)
string
[REQUIRED]
Identifies the KMS key to use in the encryption operation. The KMS key must have a KeyUsage of ENCRYPT_DECRYPT. To find the KeyUsage of a KMS key, use the DescribeKey operation.
To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.
For example:
Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab
Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab
Alias name: alias/ExampleAlias
Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias
To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.
bytes
[REQUIRED]
Data to be encrypted.
dict
Specifies the encryption context that will be used to encrypt the data. An encryption context is valid only for cryptographic operations with a symmetric encryption KMS key. The standard asymmetric encryption algorithms and HMAC algorithms that KMS uses do not support an encryption context.
An encryption context is a collection of non-secret key-value pairs that represent additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is supported only on operations with symmetric encryption KMS keys. On operations with symmetric encryption KMS keys, an encryption context is optional, but it is strongly recommended.
For more information, see Encryption context in the Key Management Service Developer Guide.
(string) --
(string) --
list
A list of grant tokens.
Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.
(string) --
string
Specifies the encryption algorithm that KMS will use to encrypt the plaintext message. The algorithm must be compatible with the KMS key that you specify.
This parameter is required only for asymmetric KMS keys. The default value, SYMMETRIC_DEFAULT, is the algorithm used for symmetric encryption KMS keys. If you are using an asymmetric KMS key, we recommend RSAES_OAEP_SHA_256.
The SM2PKE algorithm is only available in China Regions.
boolean
Checks if your request will succeed. DryRun is an optional parameter.
To learn more about how to use this parameter, see Testing your permissions in the Key Management Service Developer Guide.
dict
Response Syntax
{
'CiphertextBlob': b'bytes',
'KeyId': 'string',
'EncryptionAlgorithm': 'SYMMETRIC_DEFAULT'|'RSAES_OAEP_SHA_1'|'RSAES_OAEP_SHA_256'|'SM2PKE',
'KeyMaterialId': 'string'
}
Response Structure
(dict) --
CiphertextBlob (bytes) --
The encrypted plaintext. When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.
KeyId (string) --
The Amazon Resource Name ( key ARN) of the KMS key that was used to encrypt the plaintext.
EncryptionAlgorithm (string) --
The encryption algorithm that was used to encrypt the plaintext.
KeyMaterialId (string) --
The identifier of the key material used to encrypt the ciphertext. This field is present only when the operation uses a symmetric encryption KMS key.
{'KeyMaterialId': 'string'}
Returns a unique symmetric data key for use outside of KMS. This operation returns a plaintext copy of the data key and a copy that is encrypted under a symmetric encryption KMS key that you specify. The bytes in the plaintext key are random; they are not related to the caller or the KMS key. You can use the plaintext key to encrypt your data outside of KMS and store the encrypted data key with the encrypted data.
To generate a data key, specify the symmetric encryption KMS key that will be used to encrypt the data key. You cannot use an asymmetric KMS key to encrypt data keys. To get the type of your KMS key, use the DescribeKey operation.
You must also specify the length of the data key. Use either the KeySpec or NumberOfBytes parameters (but not both). For 128-bit and 256-bit data keys, use the KeySpec parameter.
To generate a 128-bit SM4 data key (China Regions only), specify a KeySpec value of AES_128 or a NumberOfBytes value of 16. The symmetric encryption key used in China Regions to encrypt your data key is an SM4 encryption key.
To get only an encrypted copy of the data key, use GenerateDataKeyWithoutPlaintext. To generate an asymmetric data key pair, use the GenerateDataKeyPair or GenerateDataKeyPairWithoutPlaintext operation. To get a cryptographically secure random byte string, use GenerateRandom.
You can use an optional encryption context to add additional security to the encryption operation. If you specify an EncryptionContext, you must specify the same encryption context (a case-sensitive exact match) when decrypting the encrypted data key. Otherwise, the request to decrypt fails with an InvalidCiphertextException. For more information, see Encryption Context in the Key Management Service Developer Guide.
GenerateDataKey also supports Amazon Web Services Nitro Enclaves, which provide an isolated compute environment in Amazon EC2. To call GenerateDataKey for an Amazon Web Services Nitro enclave, use the Amazon Web Services Nitro Enclaves SDK or any Amazon Web Services SDK. Use the Recipient parameter to provide the attestation document for the enclave. GenerateDataKey returns a copy of the data key encrypted under the specified KMS key, as usual. But instead of a plaintext copy of the data key, the response includes a copy of the data key encrypted under the public key from the attestation document ( CiphertextForRecipient). For information about the interaction between KMS and Amazon Web Services Nitro Enclaves, see How Amazon Web Services Nitro Enclaves uses KMS in the Key Management Service Developer Guide..
The KMS key that you use for this operation must be in a compatible key state. For details, see Key states of KMS keys in the Key Management Service Developer Guide.
How to use your data key
We recommend that you use the following pattern to encrypt data locally in your application. You can write your own code or use a client-side encryption library, such as the Amazon Web Services Encryption SDK, the Amazon DynamoDB Encryption Client, or Amazon S3 client-side encryption to do these tasks for you.
To encrypt data outside of KMS:
Use the GenerateDataKey operation to get a data key.
Use the plaintext data key (in the Plaintext field of the response) to encrypt your data outside of KMS. Then erase the plaintext data key from memory.
Store the encrypted data key (in the CiphertextBlob field of the response) with the encrypted data.
To decrypt data outside of KMS:
Use the Decrypt operation to decrypt the encrypted data key. The operation returns a plaintext copy of the data key.
Use the plaintext data key to decrypt data outside of KMS, then erase the plaintext data key from memory.
Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.
Required permissions: kms:GenerateDataKey (key policy)
Related operations:
Decrypt
Encrypt
GenerateDataKeyPair
GenerateDataKeyPairWithoutPlaintext
GenerateDataKeyWithoutPlaintext
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
See also: AWS API Documentation
Request Syntax
client.generate_data_key(
KeyId='string',
EncryptionContext={
'string': 'string'
},
NumberOfBytes=123,
KeySpec='AES_256'|'AES_128',
GrantTokens=[
'string',
],
Recipient={
'KeyEncryptionAlgorithm': 'RSAES_OAEP_SHA_256',
'AttestationDocument': b'bytes'
},
DryRun=True|False
)
string
[REQUIRED]
Specifies the symmetric encryption KMS key that encrypts the data key. You cannot specify an asymmetric KMS key or a KMS key in a custom key store. To get the type and origin of your KMS key, use the DescribeKey operation.
To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.
For example:
Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab
Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab
Alias name: alias/ExampleAlias
Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias
To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.
dict
Specifies the encryption context that will be used when encrypting the data key.
An encryption context is a collection of non-secret key-value pairs that represent additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is supported only on operations with symmetric encryption KMS keys. On operations with symmetric encryption KMS keys, an encryption context is optional, but it is strongly recommended.
For more information, see Encryption context in the Key Management Service Developer Guide.
(string) --
(string) --
integer
Specifies the length of the data key in bytes. For example, use the value 64 to generate a 512-bit data key (64 bytes is 512 bits). For 128-bit (16-byte) and 256-bit (32-byte) data keys, use the KeySpec parameter.
You must specify either the KeySpec or the NumberOfBytes parameter (but not both) in every GenerateDataKey request.
string
Specifies the length of the data key. Use AES_128 to generate a 128-bit symmetric key, or AES_256 to generate a 256-bit symmetric key.
You must specify either the KeySpec or the NumberOfBytes parameter (but not both) in every GenerateDataKey request.
list
A list of grant tokens.
Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.
(string) --
dict
A signed attestation document from an Amazon Web Services Nitro enclave and the encryption algorithm to use with the enclave's public key. The only valid encryption algorithm is RSAES_OAEP_SHA_256.
This parameter only supports attestation documents for Amazon Web Services Nitro Enclaves. To include this parameter, use the Amazon Web Services Nitro Enclaves SDK or any Amazon Web Services SDK.
When you use this parameter, instead of returning the plaintext data key, KMS encrypts the plaintext data key under the public key in the attestation document, and returns the resulting ciphertext in the CiphertextForRecipient field in the response. This ciphertext can be decrypted only with the private key in the enclave. The CiphertextBlob field in the response contains a copy of the data key encrypted under the KMS key specified by the KeyId parameter. The Plaintext field in the response is null or empty.
For information about the interaction between KMS and Amazon Web Services Nitro Enclaves, see How Amazon Web Services Nitro Enclaves uses KMS in the Key Management Service Developer Guide.
KeyEncryptionAlgorithm (string) --
The encryption algorithm that KMS should use with the public key for an Amazon Web Services Nitro Enclave to encrypt plaintext values for the response. The only valid value is RSAES_OAEP_SHA_256.
AttestationDocument (bytes) --
The attestation document for an Amazon Web Services Nitro Enclave. This document includes the enclave's public key.
boolean
Checks if your request will succeed. DryRun is an optional parameter.
To learn more about how to use this parameter, see Testing your permissions in the Key Management Service Developer Guide.
dict
Response Syntax
{
'CiphertextBlob': b'bytes',
'Plaintext': b'bytes',
'KeyId': 'string',
'CiphertextForRecipient': b'bytes',
'KeyMaterialId': 'string'
}
Response Structure
(dict) --
CiphertextBlob (bytes) --
The encrypted copy of the data key. When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.
Plaintext (bytes) --
The plaintext data key. When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded. Use this data key to encrypt your data outside of KMS. Then, remove it from memory as soon as possible.
If the response includes the CiphertextForRecipient field, the Plaintext field is null or empty.
KeyId (string) --
The Amazon Resource Name ( key ARN) of the KMS key that encrypted the data key.
CiphertextForRecipient (bytes) --
The plaintext data key encrypted with the public key from the Nitro enclave. This ciphertext can be decrypted only by using a private key in the Nitro enclave.
This field is included in the response only when the Recipient parameter in the request includes a valid attestation document from an Amazon Web Services Nitro enclave. For information about the interaction between KMS and Amazon Web Services Nitro Enclaves, see How Amazon Web Services Nitro Enclaves uses KMS in the Key Management Service Developer Guide.
KeyMaterialId (string) --
The identifier of the key material used to encrypt the data key.
{'KeyMaterialId': 'string'}
Returns a unique asymmetric data key pair for use outside of KMS. This operation returns a plaintext public key, a plaintext private key, and a copy of the private key that is encrypted under the symmetric encryption KMS key you specify. You can use the data key pair to perform asymmetric cryptography and implement digital signatures outside of KMS. The bytes in the keys are random; they are not related to the caller or to the KMS key that is used to encrypt the private key.
You can use the public key that GenerateDataKeyPair returns to encrypt data or verify a signature outside of KMS. Then, store the encrypted private key with the data. When you are ready to decrypt data or sign a message, you can use the Decrypt operation to decrypt the encrypted private key.
To generate a data key pair, you must specify a symmetric encryption KMS key to encrypt the private key in a data key pair. You cannot use an asymmetric KMS key or a KMS key in a custom key store. To get the type and origin of your KMS key, use the DescribeKey operation.
Use the KeyPairSpec parameter to choose an RSA or Elliptic Curve (ECC) data key pair. In China Regions, you can also choose an SM2 data key pair. KMS recommends that you use ECC key pairs for signing, and use RSA and SM2 key pairs for either encryption or signing, but not both. However, KMS cannot enforce any restrictions on the use of data key pairs outside of KMS.
If you are using the data key pair to encrypt data, or for any operation where you don't immediately need a private key, consider using the GenerateDataKeyPairWithoutPlaintext operation. GenerateDataKeyPairWithoutPlaintext returns a plaintext public key and an encrypted private key, but omits the plaintext private key that you need only to decrypt ciphertext or sign a message. Later, when you need to decrypt the data or sign a message, use the Decrypt operation to decrypt the encrypted private key in the data key pair.
GenerateDataKeyPair returns a unique data key pair for each request. The bytes in the keys are random; they are not related to the caller or the KMS key that is used to encrypt the private key. The public key is a DER-encoded X.509 SubjectPublicKeyInfo, as specified in RFC 5280. The private key is a DER-encoded PKCS8 PrivateKeyInfo, as specified in RFC 5958.
GenerateDataKeyPair also supports Amazon Web Services Nitro Enclaves, which provide an isolated compute environment in Amazon EC2. To call GenerateDataKeyPair for an Amazon Web Services Nitro enclave, use the Amazon Web Services Nitro Enclaves SDK or any Amazon Web Services SDK. Use the Recipient parameter to provide the attestation document for the enclave. GenerateDataKeyPair returns the public data key and a copy of the private data key encrypted under the specified KMS key, as usual. But instead of a plaintext copy of the private data key ( PrivateKeyPlaintext), the response includes a copy of the private data key encrypted under the public key from the attestation document ( CiphertextForRecipient). For information about the interaction between KMS and Amazon Web Services Nitro Enclaves, see How Amazon Web Services Nitro Enclaves uses KMS in the Key Management Service Developer Guide..
You can use an optional encryption context to add additional security to the encryption operation. If you specify an EncryptionContext, you must specify the same encryption context (a case-sensitive exact match) when decrypting the encrypted data key. Otherwise, the request to decrypt fails with an InvalidCiphertextException. For more information, see Encryption Context in the Key Management Service Developer Guide.
The KMS key that you use for this operation must be in a compatible key state. For details, see Key states of KMS keys in the Key Management Service Developer Guide.
Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.
Required permissions: kms:GenerateDataKeyPair (key policy)
Related operations:
Decrypt
Encrypt
GenerateDataKey
GenerateDataKeyPairWithoutPlaintext
GenerateDataKeyWithoutPlaintext
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
See also: AWS API Documentation
Request Syntax
client.generate_data_key_pair(
EncryptionContext={
'string': 'string'
},
KeyId='string',
KeyPairSpec='RSA_2048'|'RSA_3072'|'RSA_4096'|'ECC_NIST_P256'|'ECC_NIST_P384'|'ECC_NIST_P521'|'ECC_SECG_P256K1'|'SM2',
GrantTokens=[
'string',
],
Recipient={
'KeyEncryptionAlgorithm': 'RSAES_OAEP_SHA_256',
'AttestationDocument': b'bytes'
},
DryRun=True|False
)
dict
Specifies the encryption context that will be used when encrypting the private key in the data key pair.
An encryption context is a collection of non-secret key-value pairs that represent additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is supported only on operations with symmetric encryption KMS keys. On operations with symmetric encryption KMS keys, an encryption context is optional, but it is strongly recommended.
For more information, see Encryption context in the Key Management Service Developer Guide.
(string) --
(string) --
string
[REQUIRED]
Specifies the symmetric encryption KMS key that encrypts the private key in the data key pair. You cannot specify an asymmetric KMS key or a KMS key in a custom key store. To get the type and origin of your KMS key, use the DescribeKey operation.
To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.
For example:
Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab
Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab
Alias name: alias/ExampleAlias
Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias
To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.
string
[REQUIRED]
Determines the type of data key pair that is generated.
The KMS rule that restricts the use of asymmetric RSA and SM2 KMS keys to encrypt and decrypt or to sign and verify (but not both), and the rule that permits you to use ECC KMS keys only to sign and verify, are not effective on data key pairs, which are used outside of KMS. The SM2 key spec is only available in China Regions.
list
A list of grant tokens.
Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.
(string) --
dict
A signed attestation document from an Amazon Web Services Nitro enclave and the encryption algorithm to use with the enclave's public key. The only valid encryption algorithm is RSAES_OAEP_SHA_256.
This parameter only supports attestation documents for Amazon Web Services Nitro Enclaves. To call DeriveSharedSecret for an Amazon Web Services Nitro Enclaves, use the Amazon Web Services Nitro Enclaves SDK to generate the attestation document and then use the Recipient parameter from any Amazon Web Services SDK to provide the attestation document for the enclave.
When you use this parameter, instead of returning a plaintext copy of the private data key, KMS encrypts the plaintext private data key under the public key in the attestation document, and returns the resulting ciphertext in the CiphertextForRecipient field in the response. This ciphertext can be decrypted only with the private key in the enclave. The CiphertextBlob field in the response contains a copy of the private data key encrypted under the KMS key specified by the KeyId parameter. The PrivateKeyPlaintext field in the response is null or empty.
For information about the interaction between KMS and Amazon Web Services Nitro Enclaves, see How Amazon Web Services Nitro Enclaves uses KMS in the Key Management Service Developer Guide.
KeyEncryptionAlgorithm (string) --
The encryption algorithm that KMS should use with the public key for an Amazon Web Services Nitro Enclave to encrypt plaintext values for the response. The only valid value is RSAES_OAEP_SHA_256.
AttestationDocument (bytes) --
The attestation document for an Amazon Web Services Nitro Enclave. This document includes the enclave's public key.
boolean
Checks if your request will succeed. DryRun is an optional parameter.
To learn more about how to use this parameter, see Testing your permissions in the Key Management Service Developer Guide.
dict
Response Syntax
{
'PrivateKeyCiphertextBlob': b'bytes',
'PrivateKeyPlaintext': b'bytes',
'PublicKey': b'bytes',
'KeyId': 'string',
'KeyPairSpec': 'RSA_2048'|'RSA_3072'|'RSA_4096'|'ECC_NIST_P256'|'ECC_NIST_P384'|'ECC_NIST_P521'|'ECC_SECG_P256K1'|'SM2',
'CiphertextForRecipient': b'bytes',
'KeyMaterialId': 'string'
}
Response Structure
(dict) --
PrivateKeyCiphertextBlob (bytes) --
The encrypted copy of the private key. When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.
PrivateKeyPlaintext (bytes) --
The plaintext copy of the private key. When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.
If the response includes the CiphertextForRecipient field, the PrivateKeyPlaintext field is null or empty.
PublicKey (bytes) --
The public key (in plaintext). When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.
KeyId (string) --
The Amazon Resource Name ( key ARN) of the KMS key that encrypted the private key.
KeyPairSpec (string) --
The type of data key pair that was generated.
CiphertextForRecipient (bytes) --
The plaintext private data key encrypted with the public key from the Nitro enclave. This ciphertext can be decrypted only by using a private key in the Nitro enclave.
This field is included in the response only when the Recipient parameter in the request includes a valid attestation document from an Amazon Web Services Nitro enclave. For information about the interaction between KMS and Amazon Web Services Nitro Enclaves, see How Amazon Web Services Nitro Enclaves uses KMS in the Key Management Service Developer Guide.
KeyMaterialId (string) --
The identifier of the key material used to encrypt the private key.
{'KeyMaterialId': 'string'}
Returns a unique asymmetric data key pair for use outside of KMS. This operation returns a plaintext public key and a copy of the private key that is encrypted under the symmetric encryption KMS key you specify. Unlike GenerateDataKeyPair, this operation does not return a plaintext private key. The bytes in the keys are random; they are not related to the caller or to the KMS key that is used to encrypt the private key.
You can use the public key that GenerateDataKeyPairWithoutPlaintext returns to encrypt data or verify a signature outside of KMS. Then, store the encrypted private key with the data. When you are ready to decrypt data or sign a message, you can use the Decrypt operation to decrypt the encrypted private key.
To generate a data key pair, you must specify a symmetric encryption KMS key to encrypt the private key in a data key pair. You cannot use an asymmetric KMS key or a KMS key in a custom key store. To get the type and origin of your KMS key, use the DescribeKey operation.
Use the KeyPairSpec parameter to choose an RSA or Elliptic Curve (ECC) data key pair. In China Regions, you can also choose an SM2 data key pair. KMS recommends that you use ECC key pairs for signing, and use RSA and SM2 key pairs for either encryption or signing, but not both. However, KMS cannot enforce any restrictions on the use of data key pairs outside of KMS.
GenerateDataKeyPairWithoutPlaintext returns a unique data key pair for each request. The bytes in the key are not related to the caller or KMS key that is used to encrypt the private key. The public key is a DER-encoded X.509 SubjectPublicKeyInfo, as specified in RFC 5280.
You can use an optional encryption context to add additional security to the encryption operation. If you specify an EncryptionContext, you must specify the same encryption context (a case-sensitive exact match) when decrypting the encrypted data key. Otherwise, the request to decrypt fails with an InvalidCiphertextException. For more information, see Encryption Context in the Key Management Service Developer Guide.
The KMS key that you use for this operation must be in a compatible key state. For details, see Key states of KMS keys in the Key Management Service Developer Guide.
Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.
Required permissions: kms:GenerateDataKeyPairWithoutPlaintext (key policy)
Related operations:
Decrypt
Encrypt
GenerateDataKey
GenerateDataKeyPair
GenerateDataKeyWithoutPlaintext
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
See also: AWS API Documentation
Request Syntax
client.generate_data_key_pair_without_plaintext(
EncryptionContext={
'string': 'string'
},
KeyId='string',
KeyPairSpec='RSA_2048'|'RSA_3072'|'RSA_4096'|'ECC_NIST_P256'|'ECC_NIST_P384'|'ECC_NIST_P521'|'ECC_SECG_P256K1'|'SM2',
GrantTokens=[
'string',
],
DryRun=True|False
)
dict
Specifies the encryption context that will be used when encrypting the private key in the data key pair.
An encryption context is a collection of non-secret key-value pairs that represent additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is supported only on operations with symmetric encryption KMS keys. On operations with symmetric encryption KMS keys, an encryption context is optional, but it is strongly recommended.
For more information, see Encryption context in the Key Management Service Developer Guide.
(string) --
(string) --
string
[REQUIRED]
Specifies the symmetric encryption KMS key that encrypts the private key in the data key pair. You cannot specify an asymmetric KMS key or a KMS key in a custom key store. To get the type and origin of your KMS key, use the DescribeKey operation.
To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.
For example:
Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab
Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab
Alias name: alias/ExampleAlias
Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias
To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.
string
[REQUIRED]
Determines the type of data key pair that is generated.
The KMS rule that restricts the use of asymmetric RSA and SM2 KMS keys to encrypt and decrypt or to sign and verify (but not both), and the rule that permits you to use ECC KMS keys only to sign and verify, are not effective on data key pairs, which are used outside of KMS. The SM2 key spec is only available in China Regions.
list
A list of grant tokens.
Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.
(string) --
boolean
Checks if your request will succeed. DryRun is an optional parameter.
To learn more about how to use this parameter, see Testing your permissions in the Key Management Service Developer Guide.
dict
Response Syntax
{
'PrivateKeyCiphertextBlob': b'bytes',
'PublicKey': b'bytes',
'KeyId': 'string',
'KeyPairSpec': 'RSA_2048'|'RSA_3072'|'RSA_4096'|'ECC_NIST_P256'|'ECC_NIST_P384'|'ECC_NIST_P521'|'ECC_SECG_P256K1'|'SM2',
'KeyMaterialId': 'string'
}
Response Structure
(dict) --
PrivateKeyCiphertextBlob (bytes) --
The encrypted copy of the private key. When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.
PublicKey (bytes) --
The public key (in plaintext). When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.
KeyId (string) --
The Amazon Resource Name ( key ARN) of the KMS key that encrypted the private key.
KeyPairSpec (string) --
The type of data key pair that was generated.
KeyMaterialId (string) --
The identifier of the key material used to encrypt the private key.
{'KeyMaterialId': 'string'}
Returns a unique symmetric data key for use outside of KMS. This operation returns a data key that is encrypted under a symmetric encryption KMS key that you specify. The bytes in the key are random; they are not related to the caller or to the KMS key.
GenerateDataKeyWithoutPlaintext is identical to the GenerateDataKey operation except that it does not return a plaintext copy of the data key.
This operation is useful for systems that need to encrypt data at some point, but not immediately. When you need to encrypt the data, you call the Decrypt operation on the encrypted copy of the key.
It's also useful in distributed systems with different levels of trust. For example, you might store encrypted data in containers. One component of your system creates new containers and stores an encrypted data key with each container. Then, a different component puts the data into the containers. That component first decrypts the data key, uses the plaintext data key to encrypt data, puts the encrypted data into the container, and then destroys the plaintext data key. In this system, the component that creates the containers never sees the plaintext data key.
To request an asymmetric data key pair, use the GenerateDataKeyPair or GenerateDataKeyPairWithoutPlaintext operations.
To generate a data key, you must specify the symmetric encryption KMS key that is used to encrypt the data key. You cannot use an asymmetric KMS key or a key in a custom key store to generate a data key. To get the type of your KMS key, use the DescribeKey operation.
You must also specify the length of the data key. Use either the KeySpec or NumberOfBytes parameters (but not both). For 128-bit and 256-bit data keys, use the KeySpec parameter.
To generate an SM4 data key (China Regions only), specify a KeySpec value of AES_128 or NumberOfBytes value of 16. The symmetric encryption key used in China Regions to encrypt your data key is an SM4 encryption key.
If the operation succeeds, you will find the encrypted copy of the data key in the CiphertextBlob field.
You can use an optional encryption context to add additional security to the encryption operation. If you specify an EncryptionContext, you must specify the same encryption context (a case-sensitive exact match) when decrypting the encrypted data key. Otherwise, the request to decrypt fails with an InvalidCiphertextException. For more information, see Encryption Context in the Key Management Service Developer Guide.
The KMS key that you use for this operation must be in a compatible key state. For details, see Key states of KMS keys in the Key Management Service Developer Guide.
Cross-account use: Yes. To perform this operation with a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN in the value of the KeyId parameter.
Required permissions: kms:GenerateDataKeyWithoutPlaintext (key policy)
Related operations:
Decrypt
Encrypt
GenerateDataKey
GenerateDataKeyPair
GenerateDataKeyPairWithoutPlaintext
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
See also: AWS API Documentation
Request Syntax
client.generate_data_key_without_plaintext(
KeyId='string',
EncryptionContext={
'string': 'string'
},
KeySpec='AES_256'|'AES_128',
NumberOfBytes=123,
GrantTokens=[
'string',
],
DryRun=True|False
)
string
[REQUIRED]
Specifies the symmetric encryption KMS key that encrypts the data key. You cannot specify an asymmetric KMS key or a KMS key in a custom key store. To get the type and origin of your KMS key, use the DescribeKey operation.
To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.
For example:
Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab
Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab
Alias name: alias/ExampleAlias
Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias
To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.
dict
Specifies the encryption context that will be used when encrypting the data key.
An encryption context is a collection of non-secret key-value pairs that represent additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is supported only on operations with symmetric encryption KMS keys. On operations with symmetric encryption KMS keys, an encryption context is optional, but it is strongly recommended.
For more information, see Encryption context in the Key Management Service Developer Guide.
(string) --
(string) --
string
The length of the data key. Use AES_128 to generate a 128-bit symmetric key, or AES_256 to generate a 256-bit symmetric key.
integer
The length of the data key in bytes. For example, use the value 64 to generate a 512-bit data key (64 bytes is 512 bits). For common key lengths (128-bit and 256-bit symmetric keys), we recommend that you use the KeySpec field instead of this one.
list
A list of grant tokens.
Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.
(string) --
boolean
Checks if your request will succeed. DryRun is an optional parameter.
To learn more about how to use this parameter, see Testing your permissions in the Key Management Service Developer Guide.
dict
Response Syntax
{
'CiphertextBlob': b'bytes',
'KeyId': 'string',
'KeyMaterialId': 'string'
}
Response Structure
(dict) --
CiphertextBlob (bytes) --
The encrypted data key. When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.
KeyId (string) --
The Amazon Resource Name ( key ARN) of the KMS key that encrypted the data key.
KeyMaterialId (string) --
The identifier of the key material used to encrypt the data key.
{'ImportType': 'NEW_KEY_MATERIAL | EXISTING_KEY_MATERIAL',
'KeyMaterialDescription': 'string',
'KeyMaterialId': 'string'}
Response {'KeyId': 'string', 'KeyMaterialId': 'string'}
Imports or reimports key material into an existing KMS key that was created without key material. You can also use this operation to set or update the expiration model and expiration date of the imported key material.
By default, KMS creates KMS keys with key material that it generates. You can also generate and import your own key material. For more information about importing key material, see Importing key material.
For asymmetric, HMAC and multi-Region keys, you cannot change the key material after the initial import. You can import multiple key materials into single-Region, symmetric encryption keys and rotate the key material on demand using RotateKeyOnDemand.
After you import key material, you can reimport the same key material into that KMS key or, if the key supports on-demand rotation, import new key material. You can use the ImportType parameter to indicate whether you are importing new key material or re-importing previously imported key material. You might reimport key material to replace key material that expired or key material that you deleted. You might also reimport key material to change the expiration model or expiration date of the key material.
Each time you import key material into KMS, you can determine whether ( ExpirationModel) and when ( ValidTo) the key material expires. To change the expiration of your key material, you must import it again, either by calling ImportKeyMaterial or using the import features of the KMS console.
Before you call ImportKeyMaterial, complete these steps:
Create or identify a KMS key with EXTERNAL origin, which indicates that the KMS key is designed for imported key material. To create a new KMS key for imported key material, call the CreateKey operation with an Origin value of EXTERNAL. You can create a symmetric encryption KMS key, HMAC KMS key, asymmetric encryption KMS key, asymmetric key agreement key, or asymmetric signing KMS key. You can also import key material into a multi-Region key of any supported type. However, you can't import key material into a KMS key in a custom key store.
Call the GetParametersForImport operation to get a public key and import token set for importing key material.
Use the public key in the GetParametersForImport response to encrypt your key material.
Then, in an ImportKeyMaterial request, you submit your encrypted key material and import token. When calling this operation, you must specify the following values:
The key ID or key ARN of the KMS key to associate with the imported key material. Its Origin must be EXTERNAL and its KeyState must be PendingImport. You cannot perform this operation on a KMS key in a custom key store, or on a KMS key in a different Amazon Web Services account. To get the Origin and KeyState of a KMS key, call DescribeKey.
The encrypted key material.
The import token that GetParametersForImport returned. You must use a public key and token from the same GetParametersForImport response.
Whether the key material expires ( ExpirationModel) and, if so, when ( ValidTo). For help with this choice, see Setting an expiration time in the Key Management Service Developer Guide. If you set an expiration date, KMS deletes the key material from the KMS key on the specified date, making the KMS key unusable. To use the KMS key in cryptographic operations again, you must reimport the same key material. However, you can delete and reimport the key material at any time, including before the key material expires. Each time you reimport, you can eliminate or reset the expiration time.
When this operation is successful, the key state of the KMS key changes from PendingImport to Enabled, and you can use the KMS key in cryptographic operations. For single-Region, symmetric encryption keys, you will need to import all of the key materials associated with the KMS key to change its state to Enabled. Use the ListKeyRotations operation to list the ID and import state of each key material associated with a KMS key.
If this operation fails, use the exception to help determine the problem. If the error is related to the key material, the import token, or wrapping key, use GetParametersForImport to get a new public key and import token for the KMS key and repeat the import procedure. For help, see Create a KMS key with imported key material in the Key Management Service Developer Guide.
The KMS key that you use for this operation must be in a compatible key state. For details, see Key states of KMS keys in the Key Management Service Developer Guide.
Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.
Required permissions: kms:ImportKeyMaterial (key policy)
Related operations:
DeleteImportedKeyMaterial
GetParametersForImport
ListKeyRotations
RotateKeyOnDemand
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
See also: AWS API Documentation
Request Syntax
client.import_key_material(
KeyId='string',
ImportToken=b'bytes',
EncryptedKeyMaterial=b'bytes',
ValidTo=datetime(2015, 1, 1),
ExpirationModel='KEY_MATERIAL_EXPIRES'|'KEY_MATERIAL_DOES_NOT_EXPIRE',
ImportType='NEW_KEY_MATERIAL'|'EXISTING_KEY_MATERIAL',
KeyMaterialDescription='string',
KeyMaterialId='string'
)
string
[REQUIRED]
The identifier of the KMS key that will be associated with the imported key material. This must be the same KMS key specified in the KeyID parameter of the corresponding GetParametersForImport request. The Origin of the KMS key must be EXTERNAL and its KeyState must be PendingImport.
The KMS key can be a symmetric encryption KMS key, HMAC KMS key, asymmetric encryption KMS key, or asymmetric signing KMS key, including a multi-Region key of any supported type. You cannot perform this operation on a KMS key in a custom key store, or on a KMS key in a different Amazon Web Services account.
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.
bytes
[REQUIRED]
The import token that you received in the response to a previous GetParametersForImport request. It must be from the same response that contained the public key that you used to encrypt the key material.
bytes
[REQUIRED]
The encrypted key material to import. The key material must be encrypted under the public wrapping key that GetParametersForImport returned, using the wrapping algorithm that you specified in the same GetParametersForImport request.
datetime
The date and time when the imported key material expires. This parameter is required when the value of the ExpirationModel parameter is KEY_MATERIAL_EXPIRES. Otherwise it is not valid.
The value of this parameter must be a future date and time. The maximum value is 365 days from the request date.
When the key material expires, KMS deletes the key material from the KMS key. Without its key material, the KMS key is unusable. To use the KMS key in cryptographic operations, you must reimport the same key material.
You cannot change the ExpirationModel or ValidTo values for the current import after the request completes. To change either value, you must delete ( DeleteImportedKeyMaterial) and reimport the key material.
string
Specifies whether the key material expires. The default is KEY_MATERIAL_EXPIRES. For help with this choice, see Setting an expiration time in the Key Management Service Developer Guide.
When the value of ExpirationModel is KEY_MATERIAL_EXPIRES, you must specify a value for the ValidTo parameter. When value is KEY_MATERIAL_DOES_NOT_EXPIRE, you must omit the ValidTo parameter.
You cannot change the ExpirationModel or ValidTo values for the current import after the request completes. To change either value, you must reimport the key material.
string
Indicates whether the key material being imported is previously associated with this KMS key or not. This parameter is optional and only usable with symmetric encryption keys. The default is EXISTING_KEY_MATERIAL. If no key material has ever been imported into the KMS key, and this parameter is omitted, the parameter defaults to NEW_KEY_MATERIAL.
string
Description for the key material being imported. This parameter is optional and only usable with symmetric encryption keys. If you do not specify a key material description, KMS retains the value you specified when you last imported the same key material into this KMS key.
string
Identifies the key material being imported. This parameter is optional and only usable with symmetric encryption keys. You cannot specify a key material ID with ImportType set to NEW_KEY_MATERIAL. Whenever you import key material into a symmetric encryption key, KMS assigns a unique identifier to the key material based on the KMS key ID and the imported key material. When you re-import key material with a specified key material ID, KMS:
Computes the identifier for the key material
Matches the computed identifier against the specified key material ID
Verifies that the key material ID is already associated with the KMS key
To get the list of key material IDs associated with a KMS key, use ListKeyRotations.
dict
Response Syntax
{
'KeyId': 'string',
'KeyMaterialId': 'string'
}
Response Structure
(dict) --
KeyId (string) --
The Amazon Resource Name ( key ARN) of the KMS key into which key material was imported.
KeyMaterialId (string) --
Identifies the imported key material.
{'IncludeKeyMaterial': 'ALL_KEY_MATERIAL | ROTATIONS_ONLY'}
Response {'Rotations': {'ExpirationModel': 'KEY_MATERIAL_EXPIRES | '
'KEY_MATERIAL_DOES_NOT_EXPIRE',
'ImportState': 'IMPORTED | PENDING_IMPORT',
'KeyMaterialDescription': 'string',
'KeyMaterialId': 'string',
'KeyMaterialState': 'NON_CURRENT | CURRENT | PENDING_ROTATION',
'ValidTo': 'timestamp'}}
Returns information about the key materials associated with the specified KMS key. You can use the optional IncludeKeyMaterial parameter to control which key materials are included in the response.
You must specify the KMS key in all requests. You can refine the key rotations list by limiting the number of rotations returned.
For detailed information about automatic and on-demand key rotations, see Rotate KMS keys in the Key Management Service Developer Guide.
Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.
Required permissions: kms:ListKeyRotations (key policy)
Related operations:
EnableKeyRotation
DeleteImportedKeyMaterial
DisableKeyRotation
GetKeyRotationStatus
ImportKeyMaterial
RotateKeyOnDemand
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
See also: AWS API Documentation
Request Syntax
client.list_key_rotations(
KeyId='string',
IncludeKeyMaterial='ALL_KEY_MATERIAL'|'ROTATIONS_ONLY',
Limit=123,
Marker='string'
)
string
[REQUIRED]
Gets the key rotations 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.
string
Use this optional parameter to control which key materials associated with this key are listed in the response. The default value of this parameter is ROTATIONS_ONLY. If you omit this parameter, KMS returns information on the key materials created by automatic or on-demand key rotation. When you specify a value of ALL_KEY_MATERIAL, KMS adds the first key material and any imported key material pending rotation to the response. This parameter can only be used with KMS keys that support automatic or on-demand key rotation.
integer
Use this parameter to specify the maximum number of items to return. When this value is present, KMS does not return more than the specified number of items, but it might return fewer.
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.
string
Use this parameter in a subsequent request after you receive a response with truncated results. Set it to the value of NextMarker from the truncated response you just received.
dict
Response Syntax
{
'Rotations': [
{
'KeyId': 'string',
'KeyMaterialId': 'string',
'KeyMaterialDescription': 'string',
'ImportState': 'IMPORTED'|'PENDING_IMPORT',
'KeyMaterialState': 'NON_CURRENT'|'CURRENT'|'PENDING_ROTATION',
'ExpirationModel': 'KEY_MATERIAL_EXPIRES'|'KEY_MATERIAL_DOES_NOT_EXPIRE',
'ValidTo': datetime(2015, 1, 1),
'RotationDate': datetime(2015, 1, 1),
'RotationType': 'AUTOMATIC'|'ON_DEMAND'
},
],
'NextMarker': 'string',
'Truncated': True|False
}
Response Structure
(dict) --
Rotations (list) --
A list of completed key material rotations. When the optional input parameter IncludeKeyMaterial is specified with a value of ALL_KEY_MATERIAL, this list includes the first key material and any imported key material pending rotation.
(dict) --
Each entry contains information about one of the key materials associated with a KMS key.
KeyId (string) --
Unique identifier of the key.
KeyMaterialId (string) --
Unique identifier of the key material.
KeyMaterialDescription (string) --
User-specified description of the key material. This field is only present for symmetric encryption KMS keys with EXTERNAL origin.
ImportState (string) --
Indicates if the key material is currently imported into KMS. It has two possible values: IMPORTED or PENDING_IMPORT. This field is only present for symmetric encryption KMS keys with EXTERNAL origin.
KeyMaterialState (string) --
There are three possible values for this field: CURRENT, NON_CURRENT and PENDING_ROTATION. KMS uses CURRENT key material for both encryption and decryption and NON_CURRENT key material only for decryption. PENDING_ROTATION identifies key material that has been imported for on-demand key rotation but the rotation hasn't completed. Key material in PENDING_ROTATION is not permanently associated with the KMS key. You can delete this key material and import different key material in its place. The PENDING_ROTATION value is only used in symmetric encryption keys with imported key material. The other values, CURRENT and NON_CURRENT, are used for all KMS keys that support automatic or on-demand key rotation.
ExpirationModel (string) --
Indicates if the key material is configured to automatically expire. There are two possible values for this field: KEY_MATERIAL_EXPIRES and KEY_MATERIAL_DOES_NOT_EXPIRE. For any key material that expires, the expiration date and time is indicated in ValidTo. This field is only present for symmetric encryption KMS keys with EXTERNAL origin.
ValidTo (datetime) --
Date and time at which the key material expires. This field is only present for symmetric encryption KMS keys with EXTERNAL origin in rotation list entries with an ExpirationModel value of KEY_MATERIAL_EXPIRES.
RotationDate (datetime) --
Date and time that the key material rotation completed. Formatted as Unix time. This field is not present for the first key material or an imported key material in PENDING_ROTATION state.
RotationType (string) --
Identifies whether the key material rotation was a scheduled automatic rotation or an on-demand rotation. This field is not present for the first key material or an imported key material in PENDING_ROTATION state.
NextMarker (string) --
When Truncated is true, this element is present and contains the value to use for the Marker parameter in a subsequent request.
Truncated (boolean) --
A flag that indicates whether there are more items in the list. When this value is true, the list in this response is truncated. To get more items, pass the value of the NextMarker element in this response to the Marker parameter in a subsequent request.
{'DestinationKeyMaterialId': 'string', 'SourceKeyMaterialId': 'string'}
Decrypts ciphertext and then reencrypts it entirely within KMS. You can use this operation to change the KMS key under which data is encrypted, such as when you manually rotate a KMS key or change the KMS key that protects a ciphertext. You can also use it to reencrypt ciphertext under the same KMS key, such as to change the encryption context of a ciphertext.
The ReEncrypt operation can decrypt ciphertext that was encrypted by using a KMS key in an KMS operation, such as Encrypt or GenerateDataKey. It can also decrypt ciphertext that was encrypted by using the public key of an asymmetric KMS key outside of KMS. However, it cannot decrypt ciphertext produced by other libraries, such as the Amazon Web Services Encryption SDK or Amazon S3 client-side encryption. These libraries return a ciphertext format that is incompatible with KMS.
When you use the ReEncrypt operation, you need to provide information for the decrypt operation and the subsequent encrypt operation.
If your ciphertext was encrypted under an asymmetric KMS key, you must use the SourceKeyId parameter to identify the KMS key that encrypted the ciphertext. You must also supply the encryption algorithm that was used. This information is required to decrypt the data.
If your ciphertext was encrypted under a symmetric encryption KMS key, the SourceKeyId parameter is optional. KMS can get this information from metadata that it adds to the symmetric ciphertext blob. This feature adds durability to your implementation by ensuring that authorized users can decrypt ciphertext decades after it was encrypted, even if they've lost track of the key ID. However, specifying the source KMS key is always recommended as a best practice. When you use the SourceKeyId parameter to specify a KMS key, KMS uses only the KMS key you specify. If the ciphertext was encrypted under a different KMS key, the ReEncrypt operation fails. This practice ensures that you use the KMS key that you intend.
To reencrypt the data, you must use the DestinationKeyId parameter to specify the KMS key that re-encrypts the data after it is decrypted. If the destination KMS key is an asymmetric KMS key, you must also provide the encryption algorithm. The algorithm that you choose must be compatible with the KMS key.
The KMS key that you use for this operation must be in a compatible key state. For details, see Key states of KMS keys in the Key Management Service Developer Guide.
Cross-account use: Yes. The source KMS key and destination KMS key can be in different Amazon Web Services accounts. Either or both KMS keys can be in a different account than the caller. To specify a KMS key in a different account, you must use its key ARN or alias ARN.
Required permissions:
kms:ReEncryptFrom permission on the source KMS key (key policy)
kms:ReEncryptTo permission on the destination KMS key (key policy)
To permit reencryption from or to a KMS key, include the "kms:ReEncrypt*" permission in your key policy. This permission is automatically included in the key policy when you use the console to create a KMS key. But you must include it manually when you create a KMS key programmatically or when you use the PutKeyPolicy operation to set a key policy.
Related operations:
Decrypt
Encrypt
GenerateDataKey
GenerateDataKeyPair
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
See also: AWS API Documentation
Request Syntax
client.re_encrypt(
CiphertextBlob=b'bytes',
SourceEncryptionContext={
'string': 'string'
},
SourceKeyId='string',
DestinationKeyId='string',
DestinationEncryptionContext={
'string': 'string'
},
SourceEncryptionAlgorithm='SYMMETRIC_DEFAULT'|'RSAES_OAEP_SHA_1'|'RSAES_OAEP_SHA_256'|'SM2PKE',
DestinationEncryptionAlgorithm='SYMMETRIC_DEFAULT'|'RSAES_OAEP_SHA_1'|'RSAES_OAEP_SHA_256'|'SM2PKE',
GrantTokens=[
'string',
],
DryRun=True|False
)
bytes
[REQUIRED]
Ciphertext of the data to reencrypt.
dict
Specifies the encryption context to use to decrypt the ciphertext. Enter the same encryption context that was used to encrypt the ciphertext.
An encryption context is a collection of non-secret key-value pairs that represent additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is supported only on operations with symmetric encryption KMS keys. On operations with symmetric encryption KMS keys, an encryption context is optional, but it is strongly recommended.
For more information, see Encryption context in the Key Management Service Developer Guide.
(string) --
(string) --
string
Specifies the KMS key that KMS will use to decrypt the ciphertext before it is re-encrypted.
Enter a key ID of the KMS key that was used to encrypt the ciphertext. If you identify a different KMS key, the ReEncrypt operation throws an IncorrectKeyException.
This parameter is required only when the ciphertext was encrypted under an asymmetric KMS key. If you used a symmetric encryption KMS key, KMS can get the KMS key from metadata that it adds to the symmetric ciphertext blob. However, it is always recommended as a best practice. This practice ensures that you use the KMS key that you intend.
To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.
For example:
Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab
Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab
Alias name: alias/ExampleAlias
Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias
To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.
string
[REQUIRED]
A unique identifier for the KMS key that is used to reencrypt the data. Specify a symmetric encryption KMS key or an asymmetric KMS key with a KeyUsage value of ENCRYPT_DECRYPT. To find the KeyUsage value of a KMS key, use the DescribeKey operation.
To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.
For example:
Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab
Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab
Alias name: alias/ExampleAlias
Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias
To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.
dict
Specifies that encryption context to use when the reencrypting the data.
A destination encryption context is valid only when the destination KMS key is a symmetric encryption KMS key. The standard ciphertext format for asymmetric KMS keys does not include fields for metadata.
An encryption context is a collection of non-secret key-value pairs that represent additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. An encryption context is supported only on operations with symmetric encryption KMS keys. On operations with symmetric encryption KMS keys, an encryption context is optional, but it is strongly recommended.
For more information, see Encryption context in the Key Management Service Developer Guide.
(string) --
(string) --
string
Specifies the encryption algorithm that KMS will use to decrypt the ciphertext before it is reencrypted. The default value, SYMMETRIC_DEFAULT, represents the algorithm used for symmetric encryption KMS keys.
Specify the same algorithm that was used to encrypt the ciphertext. If you specify a different algorithm, the decrypt attempt fails.
This parameter is required only when the ciphertext was encrypted under an asymmetric KMS key.
string
Specifies the encryption algorithm that KMS will use to reecrypt the data after it has decrypted it. The default value, SYMMETRIC_DEFAULT, represents the encryption algorithm used for symmetric encryption KMS keys.
This parameter is required only when the destination KMS key is an asymmetric KMS key.
list
A list of grant tokens.
Use a grant token when your permission to call this operation comes from a new grant that has not yet achieved eventual consistency. For more information, see Grant token and Using a grant token in the Key Management Service Developer Guide.
(string) --
boolean
Checks if your request will succeed. DryRun is an optional parameter.
To learn more about how to use this parameter, see Testing your permissions in the Key Management Service Developer Guide.
dict
Response Syntax
{
'CiphertextBlob': b'bytes',
'SourceKeyId': 'string',
'KeyId': 'string',
'SourceEncryptionAlgorithm': 'SYMMETRIC_DEFAULT'|'RSAES_OAEP_SHA_1'|'RSAES_OAEP_SHA_256'|'SM2PKE',
'DestinationEncryptionAlgorithm': 'SYMMETRIC_DEFAULT'|'RSAES_OAEP_SHA_1'|'RSAES_OAEP_SHA_256'|'SM2PKE',
'SourceKeyMaterialId': 'string',
'DestinationKeyMaterialId': 'string'
}
Response Structure
(dict) --
CiphertextBlob (bytes) --
The reencrypted data. When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.
SourceKeyId (string) --
Unique identifier of the KMS key used to originally encrypt the data.
KeyId (string) --
The Amazon Resource Name ( key ARN) of the KMS key that was used to reencrypt the data.
SourceEncryptionAlgorithm (string) --
The encryption algorithm that was used to decrypt the ciphertext before it was reencrypted.
DestinationEncryptionAlgorithm (string) --
The encryption algorithm that was used to reencrypt the data.
SourceKeyMaterialId (string) --
The identifier of the key material used to originally encrypt the data. This field is present only when the original encryption used a symmetric encryption KMS key.
DestinationKeyMaterialId (string) --
The identifier of the key material used to reencrypt the data. This field is present only when data is reencrypted using a symmetric encryption KMS key.
{'ReplicaKeyMetadata': {'CurrentKeyMaterialId': 'string'}}
Replicates a multi-Region key into the specified Region. This operation creates a multi-Region replica key based on a multi-Region primary key in a different Region of the same Amazon Web Services partition. You can create multiple replicas of a primary key, but each must be in a different Region. To create a multi-Region primary key, use the CreateKey operation.
This operation supports multi-Region keys, an KMS feature that lets you create multiple interoperable KMS keys in different Amazon Web Services Regions. Because these KMS keys have the same key ID, key material, and other metadata, you can use them interchangeably to encrypt data in one Amazon Web Services Region and decrypt it in a different Amazon Web Services Region without re-encrypting the data or making a cross-Region call. For more information about multi-Region keys, see Multi-Region keys in KMS in the Key Management Service Developer Guide.
A replica key is a fully-functional KMS key that can be used independently of its primary and peer replica keys. A primary key and its replica keys share properties that make them interoperable. They have the same key ID and key material. They also have the same key spec, key usage, key material origin, and automatic key rotation status. KMS automatically synchronizes these shared properties among related multi-Region keys. All other properties of a replica key can differ, including its key policy, tags, aliases, and key state. KMS pricing and quotas for KMS keys apply to each primary key and replica key.
When this operation completes, the new replica key has a transient key state of Creating. This key state changes to Enabled (or PendingImport) after a few seconds when the process of creating the new replica key is complete. While the key state is Creating, you can manage key, but you cannot yet use it in cryptographic operations. If you are creating and using the replica key programmatically, retry on KMSInvalidStateException or call DescribeKey to check its KeyState value before using it. For details about the Creating key state, see Key states of KMS keys in the Key Management Service Developer Guide.
You cannot create more than one replica of a primary key in any Region. If the Region already includes a replica of the key you're trying to replicate, ReplicateKey returns an AlreadyExistsException error. If the key state of the existing replica is PendingDeletion, you can cancel the scheduled key deletion ( CancelKeyDeletion) or wait for the key to be deleted. The new replica key you create will have the same shared properties as the original replica key.
The CloudTrail log of a ReplicateKey operation records a ReplicateKey operation in the primary key's Region and a CreateKey operation in the replica key's Region.
If you replicate a multi-Region primary key with imported key material, the replica key is created with no key material. You must import the same key material that you imported into the primary key.
To convert a replica key to a primary key, use the UpdatePrimaryRegion operation.
Cross-account use: No. You cannot use this operation to create a replica key in a different Amazon Web Services account.
Required permissions:
kms:ReplicateKey on the primary key (in the primary key's Region). Include this permission in the primary key's key policy.
kms:CreateKey in an IAM policy in the replica Region.
To use the Tags parameter, kms:TagResource in an IAM policy in the replica Region.
Related operations
CreateKey
UpdatePrimaryRegion
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
See also: AWS API Documentation
Request Syntax
client.replicate_key(
KeyId='string',
ReplicaRegion='string',
Policy='string',
BypassPolicyLockoutSafetyCheck=True|False,
Description='string',
Tags=[
{
'TagKey': 'string',
'TagValue': 'string'
},
]
)
string
[REQUIRED]
Identifies the multi-Region primary key that is being replicated. To determine whether a KMS key is a multi-Region primary key, use the DescribeKey operation to check the value of the MultiRegionKeyType property.
Specify the key ID or key ARN of a multi-Region primary key.
For example:
Key ID: mrk-1234abcd12ab34cd56ef1234567890ab
Key ARN: arn:aws:kms:us-east-2:111122223333:key/mrk-1234abcd12ab34cd56ef1234567890ab
To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey.
string
[REQUIRED]
The Region ID of the Amazon Web Services Region for this replica key.
Enter the Region ID, such as us-east-1 or ap-southeast-2. For a list of Amazon Web Services Regions in which KMS is supported, see KMS service endpoints in the Amazon Web Services General Reference.
The replica must be in a different Amazon Web Services Region than its primary key and other replicas of that primary key, but in the same Amazon Web Services partition. KMS must be available in the replica Region. If the Region is not enabled by default, the Amazon Web Services account must be enabled in the Region. For information about Amazon Web Services partitions, see Amazon Resource Names (ARNs) in the Amazon Web Services General Reference. For information about enabling and disabling Regions, see Enabling a Region and Disabling a Region in the Amazon Web Services General Reference.
string
The key policy to attach to the KMS key. This parameter is optional. If you do not provide a key policy, KMS attaches the default key policy to the KMS key.
The key policy is not a shared property of multi-Region keys. You can specify the same key policy or a different key policy for each key in a set of related multi-Region keys. KMS does not synchronize this property.
If you provide a key policy, it must meet the following criteria:
The key policy must allow the calling principal to make a subsequent PutKeyPolicy request on the KMS key. This reduces the risk that the KMS key becomes unmanageable. For more information, see Default key policy in the Key Management Service Developer Guide. (To omit this condition, set BypassPolicyLockoutSafetyCheck to true.)
Each statement in the key policy must contain one or more principals. The principals in the key policy must exist and be visible to KMS. When you create a new Amazon Web Services principal, you might need to enforce a delay before including the new principal in a key policy because the new principal might not be immediately visible to KMS. For more information, see Changes that I make are not always immediately visible in the Amazon Web Services Identity and Access Management User Guide.
A key policy document can include only the following characters:
Printable ASCII characters from the space character ( \u0020) through the end of the ASCII character range.
Printable characters in the Basic Latin and Latin-1 Supplement character set (through \u00FF).
The tab ( \u0009), line feed ( \u000A), and carriage return ( \u000D) special characters
For information about key policies, see Key policies in KMS in the Key Management Service Developer Guide. For help writing and formatting a JSON policy document, see the IAM JSON Policy Reference in the Identity and Access Management User Guide .
boolean
Skips ("bypasses") the key policy lockout safety check. The default value is false.
Use this parameter only when you intend to prevent the principal that is making the request from making a subsequent PutKeyPolicy request on the KMS key.
string
A description of the KMS key. The default value is an empty string (no description).
The description is not a shared property of multi-Region keys. You can specify the same description or a different description for each key in a set of related multi-Region keys. KMS does not synchronize this property.
list
Assigns one or more tags to the replica key. Use this parameter to tag the KMS key when it is created. To tag an existing KMS key, use the TagResource operation.
To use this parameter, you must have kms:TagResource permission in an IAM policy.
Tags are not a shared property of multi-Region keys. You can specify the same tags or different tags for each key in a set of related multi-Region keys. KMS does not synchronize this property.
Each tag consists of a tag key and a tag value. Both the tag key and the tag value are required, but the tag value can be an empty (null) string. You cannot have more than one tag on a KMS key with the same tag key. If you specify an existing tag key with a different tag value, KMS replaces the current tag value with the specified one.
When you add tags to an Amazon Web Services resource, Amazon Web Services generates a cost allocation report with usage and costs aggregated by tags. Tags can also be used to control access to a KMS key. For details, see Tags in KMS.
(dict) --
A key-value pair. A tag consists of a tag key and a tag value. Tag keys and tag values are both required, but tag values can be empty (null) strings.
For information about the rules that apply to tag keys and tag values, see User-Defined Tag Restrictions in the Amazon Web Services Billing and Cost Management User Guide.
TagKey (string) -- [REQUIRED]
The key of the tag.
TagValue (string) -- [REQUIRED]
The value of the tag.
dict
Response Syntax
{
'ReplicaKeyMetadata': {
'AWSAccountId': 'string',
'KeyId': 'string',
'Arn': 'string',
'CreationDate': datetime(2015, 1, 1),
'Enabled': True|False,
'Description': 'string',
'KeyUsage': 'SIGN_VERIFY'|'ENCRYPT_DECRYPT'|'GENERATE_VERIFY_MAC'|'KEY_AGREEMENT',
'KeyState': 'Creating'|'Enabled'|'Disabled'|'PendingDeletion'|'PendingImport'|'PendingReplicaDeletion'|'Unavailable'|'Updating',
'DeletionDate': datetime(2015, 1, 1),
'ValidTo': datetime(2015, 1, 1),
'Origin': 'AWS_KMS'|'EXTERNAL'|'AWS_CLOUDHSM'|'EXTERNAL_KEY_STORE',
'CustomKeyStoreId': 'string',
'CloudHsmClusterId': 'string',
'ExpirationModel': 'KEY_MATERIAL_EXPIRES'|'KEY_MATERIAL_DOES_NOT_EXPIRE',
'KeyManager': 'AWS'|'CUSTOMER',
'CustomerMasterKeySpec': 'RSA_2048'|'RSA_3072'|'RSA_4096'|'ECC_NIST_P256'|'ECC_NIST_P384'|'ECC_NIST_P521'|'ECC_SECG_P256K1'|'SYMMETRIC_DEFAULT'|'HMAC_224'|'HMAC_256'|'HMAC_384'|'HMAC_512'|'SM2',
'KeySpec': 'RSA_2048'|'RSA_3072'|'RSA_4096'|'ECC_NIST_P256'|'ECC_NIST_P384'|'ECC_NIST_P521'|'ECC_SECG_P256K1'|'SYMMETRIC_DEFAULT'|'HMAC_224'|'HMAC_256'|'HMAC_384'|'HMAC_512'|'SM2',
'EncryptionAlgorithms': [
'SYMMETRIC_DEFAULT'|'RSAES_OAEP_SHA_1'|'RSAES_OAEP_SHA_256'|'SM2PKE',
],
'SigningAlgorithms': [
'RSASSA_PSS_SHA_256'|'RSASSA_PSS_SHA_384'|'RSASSA_PSS_SHA_512'|'RSASSA_PKCS1_V1_5_SHA_256'|'RSASSA_PKCS1_V1_5_SHA_384'|'RSASSA_PKCS1_V1_5_SHA_512'|'ECDSA_SHA_256'|'ECDSA_SHA_384'|'ECDSA_SHA_512'|'SM2DSA',
],
'KeyAgreementAlgorithms': [
'ECDH',
],
'MultiRegion': True|False,
'MultiRegionConfiguration': {
'MultiRegionKeyType': 'PRIMARY'|'REPLICA',
'PrimaryKey': {
'Arn': 'string',
'Region': 'string'
},
'ReplicaKeys': [
{
'Arn': 'string',
'Region': 'string'
},
]
},
'PendingDeletionWindowInDays': 123,
'MacAlgorithms': [
'HMAC_SHA_224'|'HMAC_SHA_256'|'HMAC_SHA_384'|'HMAC_SHA_512',
],
'XksKeyConfiguration': {
'Id': 'string'
},
'CurrentKeyMaterialId': 'string'
},
'ReplicaPolicy': 'string',
'ReplicaTags': [
{
'TagKey': 'string',
'TagValue': 'string'
},
]
}
Response Structure
(dict) --
ReplicaKeyMetadata (dict) --
Displays details about the new replica key, including its Amazon Resource Name ( key ARN) and Key states of KMS keys. It also includes the ARN and Amazon Web Services Region of its primary key and other replica keys.
AWSAccountId (string) --
The twelve-digit account ID of the Amazon Web Services account that owns the KMS key.
KeyId (string) --
The globally unique identifier for the KMS key.
Arn (string) --
The Amazon Resource Name (ARN) of the KMS key. For examples, see Key Management Service (KMS) in the Example ARNs section of the Amazon Web Services General Reference.
CreationDate (datetime) --
The date and time when the KMS key was created.
Enabled (boolean) --
Specifies whether the KMS key is enabled. When KeyState is Enabled this value is true, otherwise it is false.
Description (string) --
The description of the KMS key.
KeyUsage (string) --
The cryptographic operations for which you can use the KMS key.
KeyState (string) --
The current status of the KMS key.
For more information about how key state affects the use of a KMS key, see Key states of KMS keys in the Key Management Service Developer Guide.
DeletionDate (datetime) --
The date and time after which KMS deletes this KMS key. This value is present only when the KMS key is scheduled for deletion, that is, when its KeyState is PendingDeletion.
When the primary key in a multi-Region key is scheduled for deletion but still has replica keys, its key state is PendingReplicaDeletion and the length of its waiting period is displayed in the PendingDeletionWindowInDays field.
ValidTo (datetime) --
The earliest time at which any imported key material permanently associated with this KMS key expires. When a key material expires, KMS deletes the key material and the KMS key becomes unusable. This value is present only for KMS keys whose Origin is EXTERNAL and the ExpirationModel is KEY_MATERIAL_EXPIRES, otherwise this value is omitted.
Origin (string) --
The source of the key material for the KMS key. When this value is AWS_KMS, KMS created the key material. When this value is EXTERNAL, the key material was imported or the KMS key doesn't have any key material. When this value is AWS_CLOUDHSM, the key material was created in the CloudHSM cluster associated with a custom key store.
CustomKeyStoreId (string) --
A unique identifier for the custom key store that contains the KMS key. This field is present only when the KMS key is created in a custom key store.
CloudHsmClusterId (string) --
The cluster ID of the CloudHSM cluster that contains the key material for the KMS key. When you create a KMS key in an CloudHSM custom key store, KMS creates the key material for the KMS key in the associated CloudHSM cluster. This field is present only when the KMS key is created in an CloudHSM key store.
ExpirationModel (string) --
Specifies whether the KMS key's key material expires. This value is present only when Origin is EXTERNAL, otherwise this value is omitted.
KeyManager (string) --
The manager of the KMS key. KMS keys in your Amazon Web Services account are either customer managed or Amazon Web Services managed. For more information about the difference, see KMS keys in the Key Management Service Developer Guide.
CustomerMasterKeySpec (string) --
Instead, use the KeySpec field.
The KeySpec and CustomerMasterKeySpec fields have the same value. We recommend that you use the KeySpec field in your code. However, to avoid breaking changes, KMS supports both fields.
KeySpec (string) --
Describes the type of key material in the KMS key.
EncryptionAlgorithms (list) --
The encryption algorithms that the KMS key supports. You cannot use the KMS key with other encryption algorithms within KMS.
This value is present only when the KeyUsage of the KMS key is ENCRYPT_DECRYPT.
(string) --
SigningAlgorithms (list) --
The signing algorithms that the KMS key supports. You cannot use the KMS key with other signing algorithms within KMS.
This field appears only when the KeyUsage of the KMS key is SIGN_VERIFY.
(string) --
KeyAgreementAlgorithms (list) --
The key agreement algorithm used to derive a shared secret.
(string) --
MultiRegion (boolean) --
Indicates whether the KMS key is a multi-Region ( True) or regional ( False) key. This value is True for multi-Region primary and replica keys and False for regional KMS keys.
For more information about multi-Region keys, see Multi-Region keys in KMS in the Key Management Service Developer Guide.
MultiRegionConfiguration (dict) --
Lists the primary and replica keys in same multi-Region key. This field is present only when the value of the MultiRegion field is True.
For more information about any listed KMS key, use the DescribeKey operation.
MultiRegionKeyType indicates whether the KMS key is a PRIMARY or REPLICA key.
PrimaryKey displays the key ARN and Region of the primary key. This field displays the current KMS key if it is the primary key.
ReplicaKeys displays the key ARNs and Regions of all replica keys. This field includes the current KMS key if it is a replica key.
MultiRegionKeyType (string) --
Indicates whether the KMS key is a PRIMARY or REPLICA key.
PrimaryKey (dict) --
Displays the key ARN and Region of the primary key. This field includes the current KMS key if it is the primary key.
Arn (string) --
Displays the key ARN of a primary or replica key of a multi-Region key.
Region (string) --
Displays the Amazon Web Services Region of a primary or replica key in a multi-Region key.
ReplicaKeys (list) --
displays the key ARNs and Regions of all replica keys. This field includes the current KMS key if it is a replica key.
(dict) --
Describes the primary or replica key in a multi-Region key.
Arn (string) --
Displays the key ARN of a primary or replica key of a multi-Region key.
Region (string) --
Displays the Amazon Web Services Region of a primary or replica key in a multi-Region key.
PendingDeletionWindowInDays (integer) --
The waiting period before the primary key in a multi-Region key is deleted. This waiting period begins when the last of its replica keys is deleted. This value is present only when the KeyState of the KMS key is PendingReplicaDeletion. That indicates that the KMS key is the primary key in a multi-Region key, it is scheduled for deletion, and it still has existing replica keys.
When a single-Region KMS key or a multi-Region replica key is scheduled for deletion, its deletion date is displayed in the DeletionDate field. However, when the primary key in a multi-Region key is scheduled for deletion, its waiting period doesn't begin until all of its replica keys are deleted. This value displays that waiting period. When the last replica key in the multi-Region key is deleted, the KeyState of the scheduled primary key changes from PendingReplicaDeletion to PendingDeletion and the deletion date appears in the DeletionDate field.
MacAlgorithms (list) --
The message authentication code (MAC) algorithm that the HMAC KMS key supports.
This value is present only when the KeyUsage of the KMS key is GENERATE_VERIFY_MAC.
(string) --
XksKeyConfiguration (dict) --
Information about the external key that is associated with a KMS key in an external key store.
For more information, see External key in the Key Management Service Developer Guide.
Id (string) --
The ID of the external key in its external key manager. This is the ID that the external key store proxy uses to identify the external key.
CurrentKeyMaterialId (string) --
Identifies the current key material. This value is present for symmetric encryption keys with AWS_KMS origin and single-Region, symmetric encryption keys with EXTERNAL origin. These KMS keys support automatic or on-demand key rotation and can have multiple key materials associated with them. KMS uses the current key material for both encryption and decryption, and the non-current key material for decryption operations only.
ReplicaPolicy (string) --
The key policy of the new replica key. The value is a key policy document in JSON format.
ReplicaTags (list) --
The tags on the new replica key. The value is a list of tag key and tag value pairs.
(dict) --
A key-value pair. A tag consists of a tag key and a tag value. Tag keys and tag values are both required, but tag values can be empty (null) strings.
For information about the rules that apply to tag keys and tag values, see User-Defined Tag Restrictions in the Amazon Web Services Billing and Cost Management User Guide.
TagKey (string) --
The key of the tag.
TagValue (string) --
The value of the tag.