Obtaining Temporary Access Keys and Security Tokens of an IAM User

Function

This API is used to obtain temporary access keys and security tokens through a token. Temporary access keys and security tokens are issued by the system to IAM users, and can be valid for 15 minutes to 24 hours. Temporary access keys and security tokens are granted permissions based on the principle of least privilege (PoLP).

The API can be called using either a global endpoint or a region-specific endpoint. For IAM endpoints, see Regions and Endpoints.

Temporary access keys and security tokens must be used together, and the x-security-token field must be included in the request header. For details, see How Do I Use a Temporary AK/SK to Sign Requests?

Debugging

You can debug this API in API Explorer.

URI

POST /v3.0/OS-CREDENTIAL/securitytokens

Request Parameters

**Table 1** Parameters in the request header
Parameter	Mandatory	Type	Description
Content-Type	Yes	String	Fill application/json;charset=utf8 in this field.
Authorization	No	String	Specify either X-Auth-Token or Authorization (recommended). An Authorization header is generated after the AK/SK signature is authenticated. For more information, see AK/SK Signing and Authentication Algorithm.
X-Auth-Token	No	String	IAM user token, federated user token, or agency token. Specify either X-Auth-Token or Authorization (recommended). You can obtain the token from X-Subject-Token by calling the API for obtaining an IAM user token or agency token.

**Table 2** Parameters in the request body
Parameter	Mandatory	Type	Description
auth	Yes	Object	Authentication information.

**Table 3** auth
Parameter	Mandatory	Type	Description
identity	Yes	Object	Authentication parameters.

**Table 4** auth.identity
Parameter	Mandatory	Type	Description
methods	Yes	Array of strings	Authentication method. The value of this parameter is ["token"].
token	No	Object	Validity period of temporary access keys and security tokens.
policy	No	Object	Custom policy that defines the permissions assigned to the temporary access keys and security tokens (currently, the policy only applies to OBS). If this parameter is specified, the permissions assigned to the temporary access keys and security tokens are the intersection of permissions assigned to the original token and defined by this parameter. The value of policy can contain a maximum of 2,048 characters. For details about the format and grammar of IAM policies, see Policies.

**Table 5** auth.identity.policy
Parameter	Mandatory	Type	Description
Version	Yes	String	Policy version. When creating a custom policy, set this parameter to 1.1. NOTE: 1.1: Policy. A policy defines the permissions required to perform actions on a specific cloud resource under certain conditions.
Statement	Yes	Array of objects	Statement of the policy.

**Table 6** auth.identity.policy.Statement
Parameter	Mandatory	Type	Description
Action	Yes	Array of strings	Specific permissions on a resource. For details about supported actions, see "Permissions and Supported Actions" in the API Reference of cloud services. NOTE: Format: Service name:Resource type:Action, for example, vpc:ports:create Service name: indicates the product name, such as ecs, evs, or vpc. Only lowercase letters are allowed. Resource types and actions are not case-sensitive. You can use an asterisk (*) to represent all actions.
Effect	Yes	String	Effect of the permission. The value can be Allow or Deny. If both Allow and Deny statements are found in a policy, the authentication starts from the Deny statements. Options: Allow Deny
Condition	No	Map<String,Map<String,Array<String>>>	Conditions for the permissions to take effect. For details about conditions, see Policy Grammar. NOTE: In the following request example, the policy is in effect only when DomainName is set to DomainNameExample. "Condition": { "StringEquals": { "g:DomainName": [ "DomainNameExample" ] } }
Resource	No	Array of strings	Cloud resource. NOTE: Format: Service name:Region:Domain ID:Resource type:Resource path. Wildcard characters () are supported. For example, obs:::bucket: indicates all OBS buckets. For details about cloud services that support resource-level authorization, see Cloud Services Supported by IAM. The region segment can be * or a region accessible to the user. The specified resource must belong to the corresponding service that actually exists. The service name, region, domain ID, and resource type can be 1 to 50 characters long, including letters, digits, underscores (_), hyphens (-), and asterisks (*). The resource path can be 1 to 1200 characters long, excluding semicolons (;), vertical bars (\|), tildes (~), backquote (`), curly brackets ({}), square brackets ([]), and angle brackets (<>).

**Table 7** auth.identity.token
Parameter	Mandatory	Type	Description
id	No	String	Token. This parameter is mandatory if X-Auth-Token is not specified in the request header.
duration_seconds	No	Integer	Validity period (in seconds) of temporary access keys and security tokens. The value range is from 15 minutes to 24 hours. The default value is 15 minutes.

Response Parameters

**Table 8** Parameters in the response body
Parameter	Type	Description
credential	Object	Authentication result.

**Table 9** credential
Parameter	Type	Description
expires_at	String	Expiration time of access keys and security tokens. The response is UTC time.
access	String	AK.
secret	String	SK.
securitytoken	String	Obtained access keys in ciphertext.

Example Request

Request with token specified (including the token ID and the validity period of temporary access keys and security tokens)

POST https://iam.myhuaweicloud.com/v3.0/OS-CREDENTIAL/securitytokens

{
    "auth": {
        "identity": {
            "methods": [
                "token"
            ],
            "token": {
                "id": "MIIEIgYJKoZIhvc...",
                "duration_seconds": "900"
            }
        }
    }
}

Request with the X-Auth-Token header but without the token parameter

POST https://iam.myhuaweicloud.com/v3.0/OS-CREDENTIAL/securitytokens

{
    "auth": {
        "identity": {
            "methods": [
                "token"
            ]
        }
    }
}

Request with policy specified to define the permissions assigned to the obtained temporary access keys and security tokens (currently, the policy applies only to OBS). If this parameter is specified, the permissions assigned to the temporary access keys and security tokens are the intersection of permissions assigned to the original token and defined by this parameter.

POST https://iam.myhuaweicloud.com/v3.0/OS-CREDENTIAL/securitytokens

{
  "auth": {
    "identity": {
      "methods": [
        "token"
      ],
      "policy": {
        "Version": "1.1",
        "Statement": [
          {
            "Effect": "Allow",
            "Action": [
              "obs:object:GetObject"
            ],
            "Resource": [
              "OBS:*:*:object:*"
            ],
            "Condition": {
              "StringEquals": {
                "g:DomainName": [
                  "DomainNameExample"                    //Example condition value. Replace it with the actual value.
                ]
              }
            }
          }
        ]
      },
      "token": {
        "duration_seconds": 900
      }
    }
  }
}

Example Response

Status code: 201

The request is successful.

{
    "credential": {
        "access": "NZFAT5VNWEJDGZ4PZ...",
        "expires_at": "2020-01-08T03:50:07.574000Z",
        "secret": "riEoWsy3qO0BvgwfkoLVgCUvzgpjBBcvdq...",
        "securitytoken": "gQpjbi1ub3J0aC00jD4Ej..."
    }
}