Authentication

Access to the Knora API can for certain operations require a user to authenticate. Authentication can be performed in two ways:

  1. By providing password credentials, which are a combination of a identifier and password. The user identifier can be one of the following:

    • the user’s IRI,
    • the user’s Email, or
    • the user’s Username.
  2. By providing an access token

Submitting Password Credentials

When accessing any route and password credentials would need to be sent, we support two options to do so:

When using Python’s module requests, the credentials can simply be submitted as a tuple with each request using the param auth (python requests).

Access Token / Session / Login and Logout

A client can generate an access token by sending a POST request (e.g., {"identifier_type":"identifier_value", "password":"password_value"}) to the /v2/authentication route with identifier and password in the body. The identifier_type can be iri, email, or username. If the credentials are valid, a JSON WEB Token (JWT) will be sent back in the response (e.g., {"token": "eyJ0eXAiOiJ..."}). Additionally, for web browser clients a session cookie containing the JWT token is also created, containing KnoraAuthentication=eyJ0eXAiOiJ....

When accessing any route, the access token would need to be supplied, we support three options to do so:

If the token is successfully validated, then the user is deemed authenticated.

To logout, the client sends a DELETE request to the same route /v2/authentication and the access token in one of the three described ways. This will invalidate the access token, thus not allowing further request that would supply the invalidated token.

Checking Credentials

To check the credentials, send a GET request to /v2/authentication with the credentials supplied as URL parameters or HTTP authentication headers as described before.

Usage Scenarios

  1. Create token by logging-in, send token on each subsequent request, and logout when finished.
  2. Send email/password credentials on every request.