""" MIT License Copyright (c) 2025 Hopsenn Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. """ import hashlib import base64 import secrets import requests import jwt from jwt import InvalidTokenError, ExpiredSignatureError from jwt.algorithms import RSAAlgorithm from . import settings from urllib.parse import urlencode from django.contrib.auth import get_user_model def verify_jwt_token(token): try: unverified_header = jwt.get_unverified_header(token) kid = unverified_header.get("kid") jwks_url = f"{settings.HOPID_URL}/.well-known/jwks.json" jwks = requests.get(jwks_url, timeout=5).json() key_data = next((k for k in jwks["keys"] if k["kid"] == kid), None) if not key_data: return None public_key = RSAAlgorithm.from_jwk(key_data) claims = jwt.decode( token, key=public_key, algorithms=["RS256"], #audience=settings.HOPID_CLIENT_ID, issuer=settings.HOPID_URL, options={"verify_aud": False} # BAD PRACTICE / DELETE ) return claims except (InvalidTokenError, ExpiredSignatureError, requests.RequestException, KeyError) as e: print(e) return None def get_user_from_jwt_claims(claims, access_token): if not claims: return None username = claims.get("username") or claims.get("sub") email = claims.get("email") if not username or not email: return None User = get_user_model() user = User.objects.filter(email=email).first() if user: return user if not access_token: return None try: response = requests.get( f"{settings.HOPID_URL}/users/userinfo/", headers={"Authorization": f"Bearer {access_token}"}, timeout=5 ) if response.status_code != 200: return None userinfo = response.json() except requests.RequestException: return None model_fields = {f.name for f in User._meta.get_fields()} safe_defaults = { k: v for k, v in userinfo.items() if k in model_fields and k not in {'id', 'pk', 'password', 'email', 'username'} } safe_defaults.setdefault('username', username.lower()) user, _ = User.objects.get_or_create(email=email, defaults=safe_defaults) return user def refresh_access_token(refresh_token): try: response = requests.post(f"{settings.HOPID_URL}/o/token/", data={ 'grant_type': 'refresh_token', 'refresh_token': refresh_token, 'client_id': settings.HOPID_CLIENT_ID, 'client_secret': settings.HOPID_CLIENT_SECRET, }, timeout=5) if response.status_code == 200: return response.json() except requests.RequestException: pass return None def get_hopid_logout_url(): next_url = settings.HOPID_CLIENT_LOGOUT_URI or settings.HOPID_CLIENT_URI query = urlencode({"next": next_url}) return f"{settings.HOPID_URL}/users/logout/?{query}" def get_user_from_token(access_token): userinfo_url = f"{settings.HOPID_URL}/users/userinfo/" headers = {'Authorization': f'Bearer {access_token}'} try: userinfo_response = requests.get(userinfo_url, headers=headers, timeout=5) except requests.RequestException: return None if userinfo_response.status_code != 200: return None userinfo = userinfo_response.json() email = userinfo.get('email') username = userinfo.get('username') if not email or not username: return None profile, _ = get_user_model().objects.get_or_create(email=email, defaults={'username': username.lower()}) return profile def refresh_jwt_tokens(refresh_token): token_url = f"{settings.HOPID_URL}/o/token/" token_data = { 'grant_type': 'refresh_token', 'refresh_token': refresh_token, 'client_id': settings.HOPID_CLIENT_ID, 'client_secret': settings.HOPID_CLIENT_SECRET, } try: token_response = requests.post(token_url, data=token_data, timeout=5) if token_response.status_code != 200: return {"error": "Refresh failed"} return token_response.json() except requests.RequestException: return {"error": "Token refresh request failed"} def get_jwt_tokens(code, code_verifier, next=None): token_url = f"{settings.HOPID_URL}/o/token/" redirect_uri = settings.HOPID_CLIENT_CALLBACK_URI or settings.HOPID_CLIENT_URI + f'/id/callback/' if next: redirect_uri += f'?{urlencode({"next": next})}' token_data = { 'grant_type': 'authorization_code', 'code': code, 'redirect_uri': redirect_uri, 'client_id': settings.HOPID_CLIENT_ID, 'client_secret': settings.HOPID_CLIENT_SECRET, 'code_verifier': code_verifier, 'scope': 'openid profile email offline_access' } try: token_response = requests.post(token_url, data=token_data, timeout=5) except requests.RequestException: return {"error": "Token request failed"} if token_response.status_code != 200: return {"error": "Token exchange failed"} tokens = token_response.json() return tokens def generate_pkce_pair(): verifier = secrets.token_urlsafe(64) challenge = base64.urlsafe_b64encode( hashlib.sha256(verifier.encode()).digest() ).rstrip(b'=').decode() return verifier, challenge def get_hopid_login_url(request, method=None, next=None): nonce = secrets.token_urlsafe(32) verifier, challenge = generate_pkce_pair() request.session['pkce_verifier'] = verifier request.session['oidc_nonce'] = nonce base = f"{settings.HOPID_URL}/o/authorize/" redirect_uri = settings.HOPID_CLIENT_CALLBACK_URI or settings.HOPID_CLIENT_URI + f'/id/callback/' if next: redirect_uri += f'?{urlencode({"next": next})}' params = { "client_id": settings.HOPID_CLIENT_ID, "response_type": "code", "scope": "openid profile email offline_access", "redirect_uri": redirect_uri, "nonce": nonce, "code_challenge": challenge, "code_challenge_method": "S256" } if method: params.update({'method': method.lower()}) return f"{base}?{urlencode(params)}"