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OAuth server

General

The OAuth protocol enables web services consumers to access protected resources via an API without requiring users to supply the service credentials to the consumers. It's a generic methodology for unobtrusive, wire protocol level authenticated data access over HTTP.

API

Virtuoso implements the OAuth Core 1.0 specification, and exposes the following API endpoints:

Request token

Endpoint: http://server-cname/OAuth/request_token

Parameters:

  • oauth_consumer_key: The Consumer Key.
  • oauth_signature_method: The signature method the Consumer used to sign the request.
  • oauth_signature: The signature as defined in Signing Requests (Signing Requests).
  • oauth_timestamp: As defined in Nonce and Timestamp (Nonce and Timestamp).
  • oauth_nonce: As defined in Nonce and Timestamp (Nonce and Timestamp).
  • oauth_version: OPTIONAL. If present, value MUST be 1.0 .

Example

Request: 

http://localhost:8890/OAuth/request_token?oauth_version=1.0&oauth_nonce
=dad4cb071e2169cbcaa051d404ac61a3&oauth_timestamp=1201873644&oauth_cons
umer_key=f756023be5ff1f20881cf8fe398069f3976b2304&oauth_signature_metho
d=HMAC-SHA1&oauth_signature=z76k5fQ0msFsQzCmhO%2FJZ329ZUE%3D

Note : all long lines in example texts are split, i.e., the GET request is single line.

Response: 

oauth_token=b4e22daa117b0bebf60ab6ba6e401edc7addd78c&oauth_token_secret
=4de6e3ab17553a0a385ebf6a3b4dd30f

Authorization

Endpoint: http://server-cname/OAuth/authorize

Parameters:

  • oauth_token: The Request Token obtained in the previous step. The current implementation of the Service Provider declare this parameter as REQUIRED.
  • oauth_callback: OPTIONAL. The Consumer MAY specify a URL the Service Provider will use to redirect the User back to the Consumer when Obtaining User Authorization (Obtaining User Authorization) is complete.

Example

Request: 

http://localhost:8890/OAuth/authorize?oauth_token=b4e22daa117b0bebf60ab
6ba6e401edc7addd78c&oauth_callback=http%3A%2F%2Flocalhost%3A8890%2Foaut
h%2Fexample%2Fclient.php%3Fkey%3Df756023be5ff1f20881cf8fe398069f3976b23
04%26secret%3Dcc249bfb732039d8ecba9e4f94fdead7%26token%3Db4e22daa117b0b
ebf60ab6ba6e401edc7addd78c%26token_secret%3D4de6e3ab17553a0a385ebf6a3b4
dd30f%26endpoint%3Dhttp%253A%252F%252Flocalhost%253A8890%252FOAuth%252F
authorize

The User will be asked via web page to accept or decline the token.

Access token

Endpoint: http://server-cname/OAuth/access_token

Parameters:

  • oauth_consumer_key: The Consumer Key.
  • oauth_token: The Request Token obtained previously.
  • oauth_signature_method: The signature method the Consumer used to sign the request.
  • oauth_signature: The signature as defined in Signing Requests (Signing Requests).
  • oauth_timestamp: As defined in Nonce and Timestamp (Nonce and Timestamp).
  • oauth_nonce: As defined in Nonce and Timestamp (Nonce and Timestamp).
  • oauth_version: OPTIONAL. If present, value MUST be 1.0 .

Example

Request: 

http://localhost:8890/OAuth/access_token?oauth_version=1.0&oauth_nonce=
8ad75091a66bdd741472be42149c828e&oauth_timestamp=1201873800&oauth_consu
mer_key=f756023be5ff1f20881cf8fe398069f3976b2304&oauth_token=b4e22daa11
7b0bebf60ab6ba6e401edc7addd78c&oauth_signature_method=HMAC-SHA1&oauth_s
ignature=tCxy0Lod4%2Bp%2FCBPV7Ph7RrsHXe4%3D

Response: 

oauth_token=8c03b3da93480ca4728cc1194d6d03962f3bb5bb&oauth_token_secret
=854fd29c00adcedff4fbeaeb96584911

In addtion to the endpoints it define a API for PL applications to check authentication:

Authentication verification

OAUTH.DBA.check_authentication (in params any, in lines any)
  • Parameters:
    • params: an array of strings representing the HTTP parameters
    • lines - an array of HTTP request headers
  • Result:
    • on success it returns integer 1,
    • on failure it signal an SQL error.

Sample code:

A sample service (oauth.vsp): 

<html>
<body>
<?vsp
  OAUTH..check_authentication (params, lines);
?>
An OAuth testing page
</body>
</html>

Sample request:

http://localhost:8890/admin/oauth.vsp?oauth_version=1.0&oauth_nonce=d57
640869b994b2d51bf9800229c4997&oauth_timestamp=1201873935&oauth_consumer
_key=f756023be5ff1f20881cf8fe398069f3976b2304&oauth_token=8c03b3da93480
ca4728cc1194d6d03962f3bb5bb&oauth_signature_method=HMAC-SHA1&oauth_sign
ature=X3K4lr9bJVz5YLnnyJDkykQZivY%3D

Sample response:

<html>
<body>
An OAuth testing page
</body>
</html>

References

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