Changes the properties of a custom key store¶

Description¶

Changes the properties of a custom key store. You can use this operation to change the properties of an CloudHSM key store or an external key store.

Use the required CustomKeyStoreId parameter to identify the custom key store. Use the remaining optional parameters to change its properties. This operation does not return any property values. To verify the updated property values, use the describe_custom_key_stores operation.

This operation is part of the custom key stores feature in KMS, which combines the convenience and extensive integration of KMS with the isolation and control of a key store that you own and manage.

When updating the properties of an external key store, verify that the updated settings connect your key store, via the external key store proxy, to the same external key manager as the previous settings, or to a backup or snapshot of the external key manager with the same cryptographic keys. If the updated connection settings fail, you can fix them and retry, although an extended delay might disrupt Amazon Web Services services. However, if KMS permanently loses its access to cryptographic keys, ciphertext encrypted under those keys is unrecoverable.

For external key stores:

Some external key managers provide a simpler method for updating an external key store. For details, see your external key manager documentation.

When updating an external key store in the KMS console, you can upload a JSON-based proxy configuration file with the desired values. You cannot upload the proxy configuration file to the update_custom_key_store operation. However, you can use the file to help you determine the correct values for the update_custom_key_store parameters.

For an CloudHSM key store, you can use this operation to change the custom key store friendly name (NewCustomKeyStoreName), to tell KMS about a change to the kmsuser crypto user password (KeyStorePassword), or to associate the custom key store with a different, but related, CloudHSM cluster (CloudHsmClusterId). To update most properties of an CloudHSM key store, the ConnectionState of the CloudHSM key store must be DISCONNECTED. However, you can update the CustomKeyStoreName of an AWS CloudHSM key store when it is in the CONNECTED or DISCONNECTED state.

For an external key store, you can use this operation to change the custom key store friendly name (NewCustomKeyStoreName), or to tell KMS about a change to the external key store proxy authentication credentials (XksProxyAuthenticationCredential), connection method (XksProxyConnectivity), external proxy endpoint (XksProxyUriEndpoint) and path (XksProxyUriPath). For external key stores with an XksProxyConnectivity of VPC_ENDPOINT_SERVICE, you can also update the Amazon VPC endpoint service name (XksProxyVpcEndpointServiceName). To update most properties of an external key store, the ConnectionState of the external key store must be DISCONNECTED. However, you can update the CustomKeyStoreName, XksProxyAuthenticationCredential, and XksProxyUriPath of an external key store when it is in the CONNECTED or DISCONNECTED state.

If your update requires a DISCONNECTED state, before using update_custom_key_store, use the disconnect_custom_key_store operation to disconnect the custom key store. After the update_custom_key_store operation completes, use the connect_custom_key_store to reconnect the custom key store. To find the ConnectionState of the custom key store, use the describe_custom_key_stores operation.

Before updating the custom key store, verify that the new values allow KMS to connect the custom key store to its backing key store. For example, before you change the XksProxyUriPath value, verify that the external key store proxy is reachable at the new path.

If the operation succeeds, it returns a JSON object with no properties.

Cross-account use: No. You cannot perform this operation on a custom key store in a different Amazon Web Services account.

Required permissions: kms:UpdateCustomKeyStore (IAM policy)

Related operations:

• connect_custom_key_store
• create_custom_key_store
• delete_custom_key_store
• describe_custom_key_stores
• disconnect_custom_key_store

Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.

Usage¶

kms_update_custom_key_store(CustomKeyStoreId, NewCustomKeyStoreName,
  KeyStorePassword, CloudHsmClusterId, XksProxyUriEndpoint,
  XksProxyUriPath, XksProxyVpcEndpointServiceName,
  XksProxyVpcEndpointServiceOwner, XksProxyAuthenticationCredential,
  XksProxyConnectivity)

Arguments¶

• CustomKeyStoreId

  [required] Identifies the custom key store that you want to update. Enter the ID of the custom key store. To find the ID of a custom key store, use the describe_custom_key_stores operation.

• NewCustomKeyStoreName

  Changes the friendly name of the custom key store to the value that you specify. The custom key store name must be unique in the Amazon Web Services account.

  Do not include confidential or sensitive information in this field. This field may be displayed in plaintext in CloudTrail logs and other output.

  To change this value, the custom key store can be connected or disconnected.

• KeyStorePassword

  Enter the current password of the kmsuser crypto user (CU) in the CloudHSM cluster that is associated with the custom key store. This parameter is valid only for custom key stores with a CustomKeyStoreType of AWS_CLOUDHSM.

  This parameter tells KMS the current password of the kmsuser crypto user (CU). It does not set or change the password of any users in the CloudHSM cluster.

  To change this value, the CloudHSM key store must be disconnected.

• CloudHsmClusterId

  Associates the custom key store with a related CloudHSM cluster. This parameter is valid only for custom key stores with a CustomKeyStoreType of AWS_CLOUDHSM.

  Enter the cluster ID of the cluster that you used to create the custom key store or a cluster that shares a backup history and has the same cluster certificate as the original cluster. You cannot use this parameter to associate a custom key store with an unrelated cluster. In addition, the replacement cluster must fulfill the requirements for a cluster associated with a custom key store. To view the cluster certificate of a cluster, use the DescribeClusters operation.

  To change this value, the CloudHSM key store must be disconnected.

• XksProxyUriEndpoint

  Changes the URI endpoint that KMS uses to connect to your external key store proxy (XKS proxy). This parameter is valid only for custom key stores with a CustomKeyStoreType of EXTERNAL_KEY_STORE.

  For external key stores with an XksProxyConnectivity value of PUBLIC_ENDPOINT, the protocol must be HTTPS.

  For external key stores with an XksProxyConnectivity value of VPC_ENDPOINT_SERVICE, specify https:// followed by the private DNS name associated with the VPC endpoint service. Each external key store must use a different private DNS name.

  The combined XksProxyUriEndpoint and XksProxyUriPath values must be unique in the Amazon Web Services account and Region.

  To change this value, the external key store must be disconnected.

• XksProxyUriPath

  Changes the base path to the proxy APIs for this external key store. To find this value, see the documentation for your external key manager and external key store proxy (XKS proxy). This parameter is valid only for custom key stores with a CustomKeyStoreType of EXTERNAL_KEY_STORE.

  The value must start with / and must end with /kms/xks/v1, where v1 represents the version of the KMS external key store proxy API. You can include an optional prefix between the required elements such as /example/kms/xks/v1.

  The combined XksProxyUriEndpoint and XksProxyUriPath values must be unique in the Amazon Web Services account and Region.

  You can change this value when the external key store is connected or disconnected.

• XksProxyVpcEndpointServiceName

  Changes the name that KMS uses to identify the Amazon VPC endpoint service for your external key store proxy (XKS proxy). This parameter is valid when the CustomKeyStoreType is EXTERNAL_KEY_STORE and the XksProxyConnectivity is VPC_ENDPOINT_SERVICE.

  To change this value, the external key store must be disconnected.

• XksProxyVpcEndpointServiceOwner

  Changes the Amazon Web Services account ID that KMS uses to identify the Amazon VPC endpoint service for your external key store proxy (XKS proxy). This parameter is optional. If not specified, the current Amazon Web Services account ID for the VPC endpoint service will not be updated.

  To change this value, the external key store must be disconnected.

• XksProxyAuthenticationCredential

  Changes the credentials that KMS uses to sign requests to the external key store proxy (XKS proxy). This parameter is valid only for custom key stores with a CustomKeyStoreType of EXTERNAL_KEY_STORE.

  You must specify both the AccessKeyId and SecretAccessKey value in the authentication credential, even if you are only updating one value.

  This parameter doesn't establish or change your authentication credentials on the proxy. It just tells KMS the credential that you established with your external key store proxy. For example, if you rotate the credential on your external key store proxy, you can use this parameter to update the credential in KMS.

  You can change this value when the external key store is connected or disconnected.

• XksProxyConnectivity

  Changes the connectivity setting for the external key store. To indicate that the external key store proxy uses a Amazon VPC endpoint service to communicate with KMS, specify VPC_ENDPOINT_SERVICE. Otherwise, specify PUBLIC_ENDPOINT.

  If you change the XksProxyConnectivity to VPC_ENDPOINT_SERVICE, you must also change the XksProxyUriEndpoint and add an XksProxyVpcEndpointServiceName value.

  If you change the XksProxyConnectivity to PUBLIC_ENDPOINT, you must also change the XksProxyUriEndpoint and specify a null or empty string for the XksProxyVpcEndpointServiceName value.

  To change this value, the external key store must be disconnected.

Value¶

An empty list.

Request syntax¶

svc$update_custom_key_store(
  CustomKeyStoreId = "string",
  NewCustomKeyStoreName = "string",
  KeyStorePassword = "string",
  CloudHsmClusterId = "string",
  XksProxyUriEndpoint = "string",
  XksProxyUriPath = "string",
  XksProxyVpcEndpointServiceName = "string",
  XksProxyVpcEndpointServiceOwner = "string",
  XksProxyAuthenticationCredential = list(
    AccessKeyId = "string",
    RawSecretAccessKey = "string"
  ),
  XksProxyConnectivity = "PUBLIC_ENDPOINT"|"VPC_ENDPOINT_SERVICE"
)

Examples¶

# This example tells KMS the password for the kmsuser crypto user in the
# AWS CloudHSM cluster that is associated with the AWS KMS custom key
# store. (It does not change the password in the CloudHSM cluster.) This
# operation does not return any data.
svc$update_custom_key_store(
  CustomKeyStoreId = "cks-1234567890abcdef0",
  KeyStorePassword = "ExamplePassword"
)

# This example changes the friendly name of the AWS KMS custom key store
# to the name that you specify. This operation does not return any data.
# To verify that the operation worked, use the DescribeCustomKeyStores
# operation.
svc$update_custom_key_store(
  CustomKeyStoreId = "cks-1234567890abcdef0",
  NewCustomKeyStoreName = "DevelopmentKeys"
)

# This example changes the cluster that is associated with a custom key
# store to a related cluster, such as a different backup of the same
# cluster. This operation does not return any data. To verify that the
# operation worked, use the DescribeCustomKeyStores operation.
svc$update_custom_key_store(
  CloudHsmClusterId = "cluster-1a23b4cdefg",
  CustomKeyStoreId = "cks-1234567890abcdef0"
)