2022-05-06 12:41:52 +00:00
|
|
|
import requests
|
2022-03-14 08:33:31 +00:00
|
|
|
from flask import request, session, redirect, flash, url_for
|
|
|
|
from flask_limiter.util import get_remote_address
|
|
|
|
from flask_login import current_user
|
|
|
|
from requests_oauthlib import OAuth2Session
|
|
|
|
|
|
|
|
from app.auth.base import auth_bp
|
|
|
|
from app.auth.views.login_utils import after_login
|
|
|
|
from app.config import (
|
|
|
|
PROTON_BASE_URL,
|
|
|
|
PROTON_CLIENT_ID,
|
|
|
|
PROTON_CLIENT_SECRET,
|
|
|
|
PROTON_VALIDATE_CERTS,
|
|
|
|
URL,
|
|
|
|
)
|
|
|
|
from app.proton.proton_client import HttpProtonClient, convert_access_token
|
|
|
|
from app.proton.proton_callback_handler import ProtonCallbackHandler, Action
|
|
|
|
from app.utils import encode_url, sanitize_next_url
|
|
|
|
|
|
|
|
_authorization_base_url = PROTON_BASE_URL + "/oauth/authorize"
|
|
|
|
_token_url = PROTON_BASE_URL + "/oauth/token"
|
|
|
|
|
|
|
|
# need to set explicitly redirect_uri instead of leaving the lib to pre-fill redirect_uri
|
|
|
|
# when served behind nginx, the redirect_uri is localhost... and not the real url
|
|
|
|
_redirect_uri = URL + "/auth/proton/callback"
|
|
|
|
|
|
|
|
|
|
|
|
def extract_action() -> Action:
|
|
|
|
action = request.args.get("action")
|
|
|
|
if action is not None:
|
|
|
|
if action == "link":
|
|
|
|
return Action.Link
|
|
|
|
else:
|
|
|
|
raise Exception(f"Unknown action: {action}")
|
|
|
|
return Action.Login
|
|
|
|
|
|
|
|
|
|
|
|
def get_action_from_state() -> Action:
|
|
|
|
oauth_action = session["oauth_action"]
|
|
|
|
if oauth_action == Action.Login.value:
|
|
|
|
return Action.Login
|
|
|
|
elif oauth_action == Action.Link.value:
|
|
|
|
return Action.Link
|
|
|
|
raise Exception(f"Unknown action in state: {oauth_action}")
|
|
|
|
|
|
|
|
|
|
|
|
@auth_bp.route("/proton/login")
|
|
|
|
def proton_login():
|
|
|
|
if PROTON_CLIENT_ID is None or PROTON_CLIENT_SECRET is None:
|
|
|
|
return redirect(url_for("auth.login"))
|
|
|
|
|
|
|
|
next_url = sanitize_next_url(request.args.get("next"))
|
|
|
|
if next_url:
|
|
|
|
redirect_uri = _redirect_uri + "?next=" + encode_url(next_url)
|
|
|
|
else:
|
|
|
|
redirect_uri = _redirect_uri
|
|
|
|
|
|
|
|
proton = OAuth2Session(PROTON_CLIENT_ID, redirect_uri=redirect_uri)
|
|
|
|
authorization_url, state = proton.authorization_url(_authorization_base_url)
|
|
|
|
|
|
|
|
# State is used to prevent CSRF, keep this for later.
|
|
|
|
session["oauth_state"] = state
|
|
|
|
session["oauth_action"] = extract_action().value
|
|
|
|
return redirect(authorization_url)
|
|
|
|
|
|
|
|
|
|
|
|
@auth_bp.route("/proton/callback")
|
|
|
|
def proton_callback():
|
|
|
|
if PROTON_CLIENT_ID is None or PROTON_CLIENT_SECRET is None:
|
|
|
|
return redirect(url_for("auth.login"))
|
|
|
|
|
|
|
|
# user clicks on cancel
|
|
|
|
if "error" in request.args:
|
|
|
|
flash("Please use another sign in method then", "warning")
|
|
|
|
return redirect("/")
|
|
|
|
|
|
|
|
proton = OAuth2Session(
|
|
|
|
PROTON_CLIENT_ID,
|
|
|
|
state=session["oauth_state"],
|
|
|
|
redirect_uri=_redirect_uri,
|
|
|
|
)
|
2022-05-06 12:41:52 +00:00
|
|
|
|
|
|
|
def check_status_code(response: requests.Response) -> requests.Response:
|
|
|
|
if response.status_code != 200:
|
|
|
|
raise Exception(
|
|
|
|
f"Bad Proton API response [status={response.status_code}]: {response.json()}"
|
|
|
|
)
|
|
|
|
return response
|
|
|
|
|
|
|
|
proton.register_compliance_hook("access_token_response", check_status_code)
|
2022-03-14 08:33:31 +00:00
|
|
|
token = proton.fetch_token(
|
|
|
|
_token_url,
|
|
|
|
client_secret=PROTON_CLIENT_SECRET,
|
|
|
|
authorization_response=request.url,
|
|
|
|
verify=PROTON_VALIDATE_CERTS,
|
|
|
|
method="GET",
|
|
|
|
include_client_id=True,
|
|
|
|
)
|
|
|
|
credentials = convert_access_token(token["access_token"])
|
|
|
|
action = get_action_from_state()
|
|
|
|
|
|
|
|
proton_client = HttpProtonClient(
|
|
|
|
PROTON_BASE_URL, credentials, get_remote_address(), verify=PROTON_VALIDATE_CERTS
|
|
|
|
)
|
|
|
|
handler = ProtonCallbackHandler(proton_client)
|
|
|
|
|
|
|
|
if action == Action.Login:
|
|
|
|
res = handler.handle_login()
|
|
|
|
elif action == Action.Link:
|
|
|
|
res = handler.handle_link(current_user)
|
|
|
|
else:
|
|
|
|
raise Exception(f"Unknown Action: {action.name}")
|
|
|
|
|
|
|
|
if res.flash_message is not None:
|
|
|
|
flash(res.flash_message, res.flash_category)
|
|
|
|
|
|
|
|
if res.redirect_to_login:
|
|
|
|
return redirect(url_for("auth.login"))
|
|
|
|
|
|
|
|
if res.redirect:
|
|
|
|
return redirect(res.redirect)
|
|
|
|
|
|
|
|
next_url = request.args.get("next") if request.args else None
|
|
|
|
return after_login(res.user, next_url)
|