Authentication

Updated on 2025-02-14 GMT+08:00

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Requests for calling an API can be authenticated using either of the following methods:

Token-based authentication: Requests are authenticated using a token.
AK/SK-based authentication. Requests are encrypted using an access key ID (AK)/secret access key (SK) pair.

Token-based Authentication

NOTE:

The validity period of a token is 24 hours. If a token is used for authentication, cache it to prevent frequent API calling.

Ensure that the token is valid while you use it. Using a token that will soon expire may cause API calling failures.

A token specifies temporary permissions in a computer system. During API authentication using a token, the token is added to a request to get permissions for calling the API.

When calling the API for obtaining a user token, set auth.scope in the request body to project.

{ 
    "auth": { 
        "identity": { 
            "methods": [ 
                "password" 
            ], 
            "password": { 
                "user": { 
                    "name": "username", 
                    "password": "********", 
                    "domain": { 
                        "name": "domainname" 
                    } 
                } 
            } 
        }, 
        "scope": { 
            "project": { 
                "name": "xxxxxxxx" 
            } 
        } 
    } 
}

After a token is obtained, add X-Auth-Token to the request header to specify the token when calling other APIs. For example, if the token is ABCDEFG...., add X-Auth-Token: ABCDEFG.... to a request as follows:

GET https://iam.ap-southeast-3.myhuaweicloud.com/v3/auth/projects 
Content-Type: application/json 
X-Auth-Token: ABCDEFG....

AK/SK-based Authentication

NOTE:

AK/SK-based authentication supports API requests with a body not larger than 12 MB. For API requests with a larger body, token-based authentication is recommended.

In AK/SK-based authentication, AK/SK is used to sign requests and the signature is then added to the request headers for authentication.

AK: a unique identifier used in conjunction with an SK to sign requests cryptographically.
SK: used with an AK to sign requests cryptographically. It identifies a request sender and prevents the request from being modified.

In AK/SK-based authentication, you can sign requests using an AK/SK based on the signature algorithm or using the signing SDK. For details about how to sign requests and use the signing SDK, see API Request Signing Guide.

NOTICE:

The signing SDK is only used for signing requests and is different from the SDKs provided by services.

Parent topic: Calling APIs

Previous topic: Making an API Request

Next topic: Response

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