Function

This API is used to create customer master keys (CMKs) used to encrypt data encryption keys (DEKs).

Default Master Keys are created by services integrated with KMS. Names of Default Master Keys end with /default. Therefore, in naming your CMKs, do not choose those ending with /default.

URI

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

Mandatory

Type

Description

project_id

Yes

String

Project ID

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

Requests

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	User token. It can be obtained by calling the IAM API (value of X-Subject-Token in the response header).
Content-Type	Yes	String	application/json

**Table 3** Request parameters
Parameter	Mandatory	Type	Description
key_alias	Yes	String	Alias of a non-default master key (The alias's length ranges from 1 to 255 characters and matches the regular expression ^[a-zA-Z0-9:/_-]{1,255}$. In addition, it must be different from the alias of a Default Master Key created by the system.)
key_spec	No	String	Key generation algorithm. The default value is AES_256. The value can be: AES_256 RSA_2048 RSA_3072 RSA_4096 EC_P256 EC_P384 HMAC_256 HMAC_384 HMAC_512
key_usage	No	String	Key usage. The default value is ENCRYPT_DECRYPT for a symmetric key and SIGN_VERIFY for an asymmetric key. Possible values are as follows: For AES_256 symmetric keys, the default value is ENCRYPT_DECRYPT. For RSA asymmetric keys, select ENCRYPT_DECRYPT or SIGN_VERIFY. The default value is SIGN_VERIFY. For ECC asymmetric keys, the default value is SIGN_VERIFY. For HMAC keys, the default value is GENERATE_VERIFY_MAC.
key_description	No	String	CMK description (The value ranges from 0 to 255 characters.)
origin	No	String	Origin of a CMK. The default value is kms. The following values are enumerated: kms indicates that the CMK material is generated by KMS. external indicates that the CMK material is imported.
sequence	No	String	A 36-byte serial number of a request message. For example, 919c82d4-8046-4722-9094-35c3c6524cff

Responses

**Table 4** Response parameters
Parameter	Mandatory	Type	Description
key_info	Yes	Array of objects	Information about keys. For details, see Table 5.

**Table 5** **key_info** field description
Parameter	Mandatory	Type	Description
key_id	Yes	String	CMK ID
domain_id	Yes	String	User domain ID

Examples

The following example describes how to create a CMK with an alias of test.

Example request
```
{
    "key_alias": "test"
}
```

Example response

{
    "key_info": {
        "key_id": "bb6a3d22-dc93-47ac-b5bd-88df7ad35f1e",
        "domain_id": "b168fe00ff56492495a7d22974df2d0b"
    }
}

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

Status Codes

Table 6 lists the normal status code returned by the response.

**Table 6** Status codes
Status Code	Status	Description
200	OK	Request processed successfully.

Exception status code. For details, see Status Codes.

Creating a CMK

Function

URI

Requests

Responses

Examples

Status Codes