[ aws . kms ]

get-parameters-for-import

Description

Returns the items you need to import key material into a symmetric, customer managed customer master key (CMK). For more information about importing key material into AWS KMS, see Importing Key Material in the AWS Key Management Service Developer Guide .

This operation returns a public key and an import token. Use the public key to encrypt the symmetric key material. Store the import token to send with a subsequent ImportKeyMaterial request.

You must specify the key ID of the symmetric CMK into which you will import key material. This CMK’s Origin must be EXTERNAL . You must also specify the wrapping algorithm and type of wrapping key (public key) that you will use to encrypt the key material. You cannot perform this operation on an asymmetric CMK or on any CMK in a different AWS account.

To import key material, you must use the public key and import token from the same response. These items are valid for 24 hours. The expiration date and time appear in the GetParametersForImport response. You cannot use an expired token in an ImportKeyMaterial request. If your key and token expire, send another GetParametersForImport request.

The CMK that you use for this operation must be in a compatible key state. For details, see How Key State Affects Use of a Customer Master Key in the AWS Key Management Service Developer Guide .

Cross-account use : No. You cannot perform this operation on a CMK in a different AWS account.

Required permissions : kms:GetParametersForImport (key policy)

Related operations:

• ImportKeyMaterial

• DeleteImportedKeyMaterial

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.

Synopsis

  get-parameters-for-import
--key-id <value>
--wrapping-algorithm <value>
--wrapping-key-spec <value>
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]

Options

--key-id (string)

The identifier of the symmetric CMK into which you will import key material. The Origin of the CMK must be EXTERNAL .

Specify the key ID or the Amazon Resource Name (ARN) of the CMK.

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 CMK, use ListKeys or DescribeKey .

--wrapping-algorithm (string)

The algorithm you will use to encrypt the key material before importing it with ImportKeyMaterial . For more information, see Encrypt the Key Material in the AWS Key Management Service Developer Guide .

Possible values:

• RSAES_PKCS1_V1_5

• RSAES_OAEP_SHA_1

• RSAES_OAEP_SHA_256

--wrapping-key-spec (string)

The type of wrapping key (public key) to return in the response. Only 2048-bit RSA public keys are supported.

Possible values:

• RSA_2048

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See ‘aws help’ for descriptions of global parameters.

Examples

To get the items required to import key material into a CMK

The following get-parameters-for-import example gets the public key and import token that you need to import key material into a CMK. When you use the import-key-material command, be sure to use the import token and key material encrypted by the public key that were returned in the same get-parameters-for-import command. Also, the wrapping algorithm that you specify in this command must be one that you use to encrypt the key material with the public key.

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

aws kms get-parameters-for-import \
    --key-id 1234abcd-12ab-34cd-56ef-1234567890ab \
    --wrapping-algorithm RSAES_OAEP_SHA_256 \
    --wrapping-key-spec RSA_2048

Output:

{
    "KeyId": "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab",
    "PublicKey": "<public key base64 encoded data>",
    "ImportToken": "<import token base64 encoded data>",
    "ParametersValidTo": 1593893322.32
}

For more information, see Download the public key and import token in the AWS Key Management Service Developer Guide.

Output

KeyId -> (string)

The Amazon Resource Name (key ARN ) of the CMK to use in a subsequent ImportKeyMaterial request. This is the same CMK specified in the GetParametersForImport request.

ImportToken -> (blob)

The import token to send in a subsequent ImportKeyMaterial request.

PublicKey -> (blob)

The public key to use to encrypt the key material before importing it with ImportKeyMaterial .

ParametersValidTo -> (timestamp)

The time at which the import token and public key are no longer valid. After this time, you cannot use them to make an ImportKeyMaterial request and you must send another GetParametersForImport request to get new ones.