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"""Endpoints for the oauth2 server"""
import uuid
import traceback
from authlib.oauth2.rfc6749.errors import InvalidClientError
from email_validator import validate_email, EmailNotValidError
from flask import (
flash,
request,
url_for,
redirect,
Response,
Blueprint,
render_template,
current_app as app)
from gn_auth.auth import db
from gn_auth.auth.db_utils import with_db_connection
from gn_auth.auth.authorisation.errors import ForbiddenAccess
from .resource_server import require_oauth
from .endpoints.revocation import RevocationEndpoint
from .endpoints.introspection import IntrospectionEndpoint
from ..users import valid_login, NotFoundError, user_by_email
auth = Blueprint("auth", __name__)
@auth.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}."
@auth.route("/authorise", methods=["GET", "POST"])
def authorise():
"""Authorise a user"""
try:
server = app.config["OAUTH2_SERVER"]
client_id = uuid.UUID(request.args.get(
"client_id",
request.form.get("client_id", str(uuid.uuid4()))))
client = server.query_client(client_id)
if not bool(client):
flash("Invalid OAuth2 client.", "alert-error")
if request.method == "GET":
client = server.query_client(request.args.get("client_id"))
return render_template(
"oauth2/authorise-user.html",
client=client,
scope=client.scope,
response_type="code")
form = request.form
def __authorise__(conn: db.DbConnection) -> Response:
email_passwd_msg = "Email or password is invalid!"
redirect_response = redirect(url_for("oauth2.auth.authorise",
client_id=client_id))
try:
email = validate_email(
form.get("user:email"), check_deliverability=False)
user = user_by_email(conn, email["email"])
if valid_login(conn, user, form.get("user:password", "")):
return server.create_authorization_response(request=request, grant_user=user)
flash(email_passwd_msg, "alert-error")
return redirect_response # type: ignore[return-value]
except EmailNotValidError as _enve:
app.logger.debug(traceback.format_exc())
flash(email_passwd_msg, "alert-error")
return redirect_response # type: ignore[return-value]
except NotFoundError as _nfe:
app.logger.debug(traceback.format_exc())
flash(email_passwd_msg, "alert-error")
return redirect_response # type: ignore[return-value]
return with_db_connection(__authorise__)
except InvalidClientError as ice:
return render_template(
"oauth2/oauth2_error.html", error=ice), ice.status_code
@auth.route("/token", methods=["POST"])
def token():
"""Retrieve the authorisation token."""
server = app.config["OAUTH2_SERVER"]
return server.create_token_response()
@auth.route("/revoke", methods=["POST"])
def revoke_token():
"""Revoke the token."""
return app.config["OAUTH2_SERVER"].create_endpoint_response(
RevocationEndpoint.ENDPOINT_NAME)
@auth.route("/introspect", methods=["POST"])
@require_oauth("introspect")
def introspect_token() -> Response:
"""Provide introspection information for the token."""
# This is dangerous to provide publicly
authorised_clients = app.config.get(
"OAUTH2_CLIENTS_WITH_INTROSPECTION_PRIVILEGE", [])
with require_oauth.acquire("introspect") as the_token:
if the_token.client.client_id in authorised_clients:
return app.config["OAUTH2_SERVER"].create_endpoint_response(
IntrospectionEndpoint.ENDPOINT_NAME)
raise ForbiddenAccess("You cannot access this endpoint")
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