Authentication
Token authentication is required to call APIs.
Authentication using tokens: General requests are authenticated using tokens.
Token-based Authentication
![](https://support.huaweicloud.com/eu/api-ddm/public_sys-resources/note_3.0-en-us.png)
The validity period of a token is 24 hours. If a token is required, the system caches the token to avoid frequent calling.
A token specifies temporary permissions in a computer system. Token-based authentication adds a token in a request as its header during API calling to obtain the permissions for operating APIs on IAM.
{ "auth": { "identity": { "methods": [ "password" ], "password": { "user": { "name": "username", "password": "********", "domain": { "name": "domainname" } } } }, "scope": { "project": { "name": "xxxxxxxx" } } } }
In Making an API Request, the process of calling the API used to obtain a user token is described.
After obtaining the token, add the X-Auth-Token header in a request to specify the token when calling other APIs. For example, if the token is ABCDEFJ...., X-Auth-Token: ABCDEFJ.... can be added to a request as follows:
1 2 |
Content-Type: application/json
X-Auth-Token: ABCDEFJ....
|
AK/SK-based Authentication
![](https://support.huaweicloud.com/eu/api-ddm/public_sys-resources/note_3.0-en-us.png)
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 requests for authentication.
- AK: access key ID, which is a unique identifier associated with a secret access key and is used in conjunction with a secret access key to sign requests cryptographically.
- SK: secret access key used in conjunction with an AK to sign requests cryptographically. It identifies a request sender and prevents the request from being modified.
![](https://support.huaweicloud.com/eu/api-ddm/public_sys-resources/notice_3.0-en-us.png)
The signing SDK is only used for signing requests and is different from the SDKs provided by services.
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