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Creating a DEK

Function

This API allows you to create a DEK. A returned result includes the plaintext and the ciphertext of a DEK.

URI

POST /v1.0/{project_id}/kms/create-datakey

Table 1 Path parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID.

Request Parameters

Table 2 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

User token. The token can be obtained by calling the IAM API (value of X-Subject-Token in the response header).
Table 3 Request body parameters

Parameter

Mandatory

Type

Description

key_id

Yes

String

CMK ID. It should be 36 bytes and match the regular expression ^[0-9a-z]{8}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{12}$. Example: 0d0466b0-e727-4d9c-b35d-f84bb474a37f

encryption_context

No

Object

Key-value pairs with a maximum length of 8,192 characters. This parameter is used to record resource context information, excluding sensitive information, to ensure data integrity. If this parameter is specified during encryption, it is also required for decryption. Example: {"Key1":"Value1","Key2":"Value2"}

key_spec

No

String

Bit length of the generated key. Valid values: AES_256 and AES_128.

  • AES_256: a 256-bit symmetric key

  • AES_128: a 128-bit symmetric key Note: Set either datakey_length or key_spec.

  • If neither of them is specified, a 256-bit key is generated by default.

  • If both of them are specified, only datakey_length takes effect.

datakey_length

No

String

Bit length of a key. The value is a multiple of 8, in the range 8 to 8,192. Note: Set either datakey_length or key_spec.

  • If neither of them is specified, a 256-bit key is generated by default.

  • If both of them are specified, only datakey_length takes effect.

sequence

No

String

36-byte sequence number of a request message. Example: 919c82d4-8046-4722-9094-35c3c6524cff

Response Parameters

Status code: 200

Table 4 Response body parameters

Parameter

Type

Description

key_id

String

CMK ID.

plain_text

String

Plaintext DEK in hexadecimal format. Two characters represent 1 byte.

cipher_text

String

Ciphertext DEK in hexadecimal format. Two characters represent 1 byte.

Status code: 400

Table 5 Response body parameters

Parameter

Type

Description

error

Object

Error message.
Table 6 ErrorDetail

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error information.

Status code: 403

Table 7 Response body parameters

Parameter

Type

Description

error

Object

Error message.
Table 8 ErrorDetail

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error information.

Status code: 404

Table 9 Response body parameters

Parameter

Type

Description

error

Object

Error message.
Table 10 ErrorDetail

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error information.

Example Requests

{
  "key_id" : "0d0466b0-e727-4d9c-b35d-f84bb474a37f",
  "datakey_length" : "512"
}

Example Responses

Status code: 200

Request processing succeeded.

{
  "key_id" : "0d0466b0-e727-4d9c-b35d-f84bb474a37f",
  "plain_text" : "8151014275E426C72EE7D44267XXXXX...",
  "cipher_text" : "020098009EEAFCE122CAA5927D2XXX..."
}

Status code: 400

Invalid request parameters.

{
  "error" : {
    "error_code" : "KMS.XXX",
    "error_msg" : "XXX"
  }
}

Status code: 403

Authentication failed.

{
  "error" : {
    "error_code" : "KMS.XXX",
    "error_msg" : "XXX"
  }
}

Status code: 404

The requested resource does not exist or is not found.

{
  "error" : {
    "error_code" : "KMS.XXX",
    "error_msg" : "XXX"
  }
}

Status Codes

Status Code

Description

200

Request processing succeeded.

400

Invalid request parameters.

403

Authentication failed.

404

The requested resource does not exist or is not found.

Error Codes

See Error Codes.

Parent topic: DEK Management