auth: implement OAuth2 flow.oauth2_auth_flow

Add code to implement the OAuth2 flow.

* Add test fixtures for setting up users and OAuth2 clients
* Add tests for token generation with the "Password Grant" flow
* Fix some issues with test due to changes in the database connection's
  row_factory

1 files changed, 42 insertions, 0 deletions

diff --git a/gn3/auth/authentication/oauth2/views.py b/gn3/auth/authentication/oauth2/views.py
new file mode 100644
index 0000000..58fa6d4
--- /dev/null
+++ b/gn3/auth/authentication/oauth2/views.py
@@ -0,0 +1,42 @@
+"""Endpoints for the oauth2 server"""
+import uuid
+
+from flask import Blueprint, current_app as app
+
+from .endpoints.revocation import RevocationEndpoint
+from .endpoints.introspection import IntrospectionEndpoint
+
+oauth2 = Blueprint("oauth2", __name__)
+
+@oauth2.route("/register-client", methods=["GET", "POST"])
+def register_client():
+    """Register an OAuth2 client."""
+    return "WOULD REGISTER ..."
+
+@oauth2.route("/delete-client/<uuid:client_id>", methods=["GET", "POST"])
+def delete_client(client_id: uuid.UUID):
+    """Delete an OAuth2 client."""
+    return f"WOULD DELETE OAUTH2 CLIENT {client_id}."
+
+@oauth2.route("/authorise", methods=["GET", "POST"])
+def authorise():
+    """Authorise a user"""
+    return "WOULD AUTHORISE THE USER."
+
+@oauth2.route("/token", methods=["POST"])
+def token():
+    """Retrieve the authorisation token."""
+    server = app.config["OAUTH2_SERVER"]
+    return server.create_token_response()
+
+@oauth2.route("/revoke", methods=["POST"])
+def revoke_token():
+    """Revoke the token."""
+    return app.config["OAUTH2_SERVER"].create_endpoint_response(
+        RevocationEndpoint.ENDPOINT_NAME)
+
+@oauth2.route("/introspect", methods=["POST"])
+def introspect_token():
+    """Provide introspection information for the token."""
+    return app.config["OAUTH2_SERVER"].create_endpoint_response(
+        IntrospectionEndpoint.ENDPOINT_NAME)