Function

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

By default, the performance threshold for creating DEKs is 1000 TPS per customer. To apply for higher performance, submit a service ticket.

URI

URI format
POST /v1.0/{project_id}/kms/create-datakey
Parameter description
Table 1 Parameters
Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID

**Table 1** Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID

Requests

**Table 2** Request parameters
Parameter	Mandatory	Type	Description
key_id	Yes	String	36-byte ID of a CMK that matches the regular expression ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$ Example: 0d0466b0-e727-4d9c-b35d-f84bb474a37f
encryption_context	No	Object	Key-value pairs with a maximum length of 8192 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"}
datakey_length	Yes	String	Number of bits of a key. The value is 512.
sequence	No	String	36-byte serial number of a request message Example: 919c82d4-8046-4722-9094-35c3c6524cff

Responses

**Table 3** Response parameters
Parameter	Mandatory	Type	Description
key_id	Yes	String	CMK ID
plain_text	Yes	String	The plaintext of a DEK is expressed in hexadecimal format, and two characters indicate one byte.
cipher_text	Yes	String	The ciphertext of a DEK is expressed in hexadecimal format, and two characters indicate one byte.

Examples

The following example describes how to create a DEK whose ID is 0d0466b0-e727-4d9c-b35d-f84bb474a37f and length is 512 bits.

Example request

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

Example response

{
    "key_id": "0d0466b0-e727-4d9c-b35d-f84bb474a37f",
    "plain_text": "8151014275E426C72EE7D44267EF11590DCE0089E19863BA8CC832187B156A72A5A17F17B5EF0D525872C59ECEB72948AF85E18427F8BE0D46545C979306C08D",
    "cipher_text": "020098009EEAFCE122CAA5927D2E020086F9548BA1675FDB022E4ECC01B96F2189CF4B85E78357E73E1CEB518DAF7A4960E7C7DE8885ED3FB2F1471ABF400119CC1B20BD3C4A9B80AF590EFD0AEDABFDBB0E2B689DA7B6C9E7D3C5645FCD9274802586BE63779471F9156F2CDF07CD8412FFBE9230643034363662302D653732372D346439632D623335642D6638346262343734613337660000000045B05321483BD9F9561865EE7DFE9BE267A42EB104E98C16589CE46940B18E52"
}

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

Status Codes

Table 4 lists the normal status code returned by the response.

**Table 4** Status codes
Status Code	Status	Description
200	OK	Request processed successfully.

Exception status code. For details, see Status Codes.

Creating a DEK

Function

URI

Requests

Responses

Examples

Status Codes