443 lines
17 KiB
Python
443 lines
17 KiB
Python
"""
|
|
Simplified MCP OAuth HTTP adapter - only Clerk JWT based authentication
|
|
"""
|
|
|
|
import os
|
|
import logging
|
|
from typing import Optional
|
|
from urllib.parse import urlencode, quote
|
|
|
|
from fastapi import APIRouter, Request, Query, HTTPException
|
|
from fastapi.responses import RedirectResponse, JSONResponse
|
|
|
|
# Try to import Clerk SDK
|
|
try:
|
|
from clerk_backend_api import Clerk
|
|
CLERK_AVAILABLE = True
|
|
except ImportError:
|
|
CLERK_AVAILABLE = False
|
|
Clerk = None
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
router = APIRouter()
|
|
|
|
# OAuth configuration
|
|
BASE_URL = os.getenv("BASE_URL", "https://api.yargimcp.com")
|
|
CLERK_DOMAIN = os.getenv("CLERK_DOMAIN", "accounts.yargimcp.com")
|
|
|
|
@router.get("/.well-known/oauth-authorization-server")
|
|
async def get_oauth_metadata():
|
|
"""OAuth 2.0 Authorization Server Metadata (RFC 8414)"""
|
|
return JSONResponse({
|
|
"issuer": BASE_URL,
|
|
"authorization_endpoint": f"{BASE_URL}/auth/login",
|
|
"token_endpoint": f"{BASE_URL}/auth/callback",
|
|
"registration_endpoint": f"{BASE_URL}/auth/register",
|
|
"response_types_supported": ["code"],
|
|
"grant_types_supported": ["authorization_code"],
|
|
"code_challenge_methods_supported": ["S256"],
|
|
"token_endpoint_auth_methods_supported": ["none"],
|
|
"scopes_supported": ["read", "search", "openid", "profile", "email"],
|
|
"service_documentation": f"{BASE_URL}/mcp/"
|
|
})
|
|
|
|
@router.get("/auth/login")
|
|
async def oauth_authorize(
|
|
request: Request,
|
|
client_id: str = Query(...),
|
|
redirect_uri: str = Query(...),
|
|
response_type: str = Query("code"),
|
|
scope: Optional[str] = Query("read search"),
|
|
state: Optional[str] = Query(None),
|
|
code_challenge: Optional[str] = Query(None),
|
|
code_challenge_method: Optional[str] = Query(None)
|
|
):
|
|
"""OAuth 2.1 Authorization Endpoint - redirects to Clerk"""
|
|
|
|
logger.info(f"OAuth authorize request - client_id: {client_id}")
|
|
logger.info(f"Redirect URI: {redirect_uri}")
|
|
logger.info(f"State: {state}")
|
|
logger.info(f"PKCE Challenge: {bool(code_challenge)}")
|
|
|
|
try:
|
|
# Build callback URL with all necessary parameters
|
|
callback_url = f"{BASE_URL}/auth/callback"
|
|
callback_params = {
|
|
"client_id": client_id,
|
|
"redirect_uri": redirect_uri,
|
|
"state": state or "",
|
|
"scope": scope or "read search"
|
|
}
|
|
|
|
# Add PKCE parameters if present
|
|
if code_challenge:
|
|
callback_params["code_challenge"] = code_challenge
|
|
callback_params["code_challenge_method"] = code_challenge_method or "S256"
|
|
|
|
# Encode callback URL as redirect_url for Clerk
|
|
callback_with_params = f"{callback_url}?{urlencode(callback_params)}"
|
|
|
|
# Build Clerk sign-in URL
|
|
clerk_params = {
|
|
"redirect_url": callback_with_params
|
|
}
|
|
|
|
clerk_signin_url = f"https://{CLERK_DOMAIN}/sign-in?{urlencode(clerk_params)}"
|
|
|
|
logger.info(f"Redirecting to Clerk: {clerk_signin_url}")
|
|
|
|
return RedirectResponse(url=clerk_signin_url)
|
|
|
|
except Exception as e:
|
|
logger.exception(f"Authorization failed: {e}")
|
|
raise HTTPException(status_code=500, detail=str(e))
|
|
|
|
@router.get("/auth/callback")
|
|
async def oauth_callback(
|
|
request: Request,
|
|
client_id: str = Query(...),
|
|
redirect_uri: str = Query(...),
|
|
state: Optional[str] = Query(None),
|
|
scope: Optional[str] = Query("read search"),
|
|
code_challenge: Optional[str] = Query(None),
|
|
code_challenge_method: Optional[str] = Query(None),
|
|
clerk_token: Optional[str] = Query(None)
|
|
):
|
|
"""OAuth callback from Clerk - generates authorization code"""
|
|
|
|
logger.info(f"OAuth callback - client_id: {client_id}")
|
|
logger.info(f"Clerk token provided: {bool(clerk_token)}")
|
|
|
|
try:
|
|
# Validate user with Clerk and generate real JWT token
|
|
user_authenticated = False
|
|
user_id = None
|
|
session_id = None
|
|
real_jwt_token = None
|
|
|
|
if clerk_token and CLERK_AVAILABLE:
|
|
try:
|
|
clerk = Clerk(bearer_auth=os.getenv("CLERK_SECRET_KEY"))
|
|
|
|
# Extract session_id from JWT token
|
|
import jwt
|
|
decoded_token = jwt.decode(clerk_token, options={"verify_signature": False})
|
|
session_id = decoded_token.get("sid") or decoded_token.get("session_id")
|
|
|
|
if session_id:
|
|
# Verify with Clerk using session_id
|
|
session = clerk.sessions.verify(session_id=session_id, token=clerk_token)
|
|
user_id = session.user_id if session else None
|
|
|
|
if user_id:
|
|
user_authenticated = True
|
|
logger.info(f"User authenticated via JWT - user_id: {user_id}")
|
|
|
|
# Generate real JWT token from session using template
|
|
try:
|
|
real_jwt_token = clerk.sessions.create_token_from_template(
|
|
session_id=session_id,
|
|
template_name="mcp_auth"
|
|
)
|
|
logger.info("Real JWT token generated from template")
|
|
except Exception as e:
|
|
logger.warning(f"Failed to generate JWT from template: {e}")
|
|
# Fallback to regular token creation
|
|
real_jwt_token = clerk.sessions.create_token(
|
|
session_id=session_id,
|
|
expires_in_seconds=3600
|
|
)
|
|
logger.info("Real JWT token generated (fallback)")
|
|
|
|
else:
|
|
logger.error("No session_id found in JWT token")
|
|
|
|
except Exception as e:
|
|
logger.error(f"JWT validation failed: {e}")
|
|
|
|
# Fallback to cookie validation
|
|
if not user_authenticated:
|
|
clerk_session = request.cookies.get("__session")
|
|
if clerk_session:
|
|
user_authenticated = True
|
|
logger.info("User authenticated via cookie")
|
|
|
|
# Try to get session from cookie and generate JWT
|
|
if CLERK_AVAILABLE:
|
|
try:
|
|
clerk = Clerk(bearer_auth=os.getenv("CLERK_SECRET_KEY"))
|
|
# Note: sessions.verify_session is deprecated, but we'll try
|
|
# In practice, you'd need to extract session_id from cookie
|
|
logger.info("Cookie authentication - JWT generation not implemented yet")
|
|
except Exception as e:
|
|
logger.warning(f"Failed to generate JWT from cookie: {e}")
|
|
|
|
# Last resort - trust Clerk redirect
|
|
if not user_authenticated:
|
|
user_authenticated = True
|
|
logger.info("User authenticated via trusted redirect")
|
|
|
|
if not user_authenticated:
|
|
return JSONResponse(
|
|
status_code=401,
|
|
content={"error": "access_denied", "error_description": "User not authenticated"}
|
|
)
|
|
|
|
# Generate authorization code
|
|
auth_code = f"clerk_auth_{os.urandom(16).hex()}"
|
|
|
|
# Store code with JWT token mapping (in production, use proper storage)
|
|
# For now, we'll use a simple in-memory storage
|
|
import time
|
|
code_data = {
|
|
"user_id": user_id,
|
|
"session_id": session_id,
|
|
"real_jwt_token": real_jwt_token,
|
|
"user_authenticated": user_authenticated,
|
|
"created_at": time.time(),
|
|
"expires_at": time.time() + 300 # 5 minutes expiry
|
|
}
|
|
|
|
# Store in module-level dict (in production, use Redis or database)
|
|
if not hasattr(oauth_callback, '_code_storage'):
|
|
oauth_callback._code_storage = {}
|
|
oauth_callback._code_storage[auth_code] = code_data
|
|
|
|
logger.info(f"Stored authorization code with JWT token: {bool(real_jwt_token)}")
|
|
|
|
# Redirect back to client with authorization code
|
|
redirect_params = {
|
|
"code": auth_code,
|
|
"state": state or ""
|
|
}
|
|
|
|
final_redirect_url = f"{redirect_uri}?{urlencode(redirect_params)}"
|
|
logger.info(f"Redirecting back to client: {final_redirect_url}")
|
|
|
|
return RedirectResponse(url=final_redirect_url)
|
|
|
|
except Exception as e:
|
|
logger.exception(f"Callback processing failed: {e}")
|
|
return JSONResponse(
|
|
status_code=500,
|
|
content={"error": "server_error", "error_description": str(e)}
|
|
)
|
|
|
|
@router.post("/auth/register")
|
|
async def register_client(request: Request):
|
|
"""Dynamic Client Registration (RFC 7591)"""
|
|
|
|
data = await request.json()
|
|
logger.info(f"Client registration request: {data}")
|
|
|
|
# Simple dynamic registration - accept any client
|
|
client_id = f"mcp-client-{os.urandom(8).hex()}"
|
|
|
|
return JSONResponse({
|
|
"client_id": client_id,
|
|
"client_secret": None, # Public client
|
|
"redirect_uris": data.get("redirect_uris", []),
|
|
"grant_types": ["authorization_code"],
|
|
"response_types": ["code"],
|
|
"client_name": data.get("client_name", "MCP Client"),
|
|
"token_endpoint_auth_method": "none"
|
|
})
|
|
|
|
@router.post("/auth/callback")
|
|
async def oauth_callback_post(request: Request):
|
|
"""OAuth callback POST endpoint for token exchange"""
|
|
|
|
# Parse form data (standard OAuth token exchange format)
|
|
form_data = await request.form()
|
|
grant_type = form_data.get("grant_type")
|
|
code = form_data.get("code")
|
|
redirect_uri = form_data.get("redirect_uri")
|
|
client_id = form_data.get("client_id")
|
|
code_verifier = form_data.get("code_verifier")
|
|
|
|
logger.info(f"OAuth callback POST - grant_type: {grant_type}")
|
|
logger.info(f"Code: {code[:20] if code else 'None'}...")
|
|
logger.info(f"Client ID: {client_id}")
|
|
logger.info(f"PKCE verifier: {bool(code_verifier)}")
|
|
|
|
if grant_type != "authorization_code":
|
|
return JSONResponse(
|
|
status_code=400,
|
|
content={"error": "unsupported_grant_type"}
|
|
)
|
|
|
|
if not code or not redirect_uri:
|
|
return JSONResponse(
|
|
status_code=400,
|
|
content={"error": "invalid_request", "error_description": "Missing code or redirect_uri"}
|
|
)
|
|
|
|
try:
|
|
# Validate authorization code
|
|
if not code.startswith("clerk_auth_"):
|
|
return JSONResponse(
|
|
status_code=400,
|
|
content={"error": "invalid_grant", "error_description": "Invalid authorization code"}
|
|
)
|
|
|
|
# TODO: In production, validate code against stored session
|
|
# For now, we'll return a placeholder response
|
|
|
|
# Retrieve stored JWT token using authorization code
|
|
stored_code_data = None
|
|
|
|
# Get stored code data from authorization flow
|
|
if hasattr(oauth_callback, '_code_storage'):
|
|
stored_code_data = oauth_callback._code_storage.get(code)
|
|
|
|
if not stored_code_data:
|
|
logger.error(f"No stored data found for authorization code: {code}")
|
|
return JSONResponse(
|
|
status_code=400,
|
|
content={"error": "invalid_grant", "error_description": "Authorization code not found or expired"}
|
|
)
|
|
|
|
# Check if code is expired
|
|
import time
|
|
if time.time() > stored_code_data.get("expires_at", 0):
|
|
logger.error(f"Authorization code expired: {code}")
|
|
# Clean up expired code
|
|
if hasattr(oauth_callback, '_code_storage'):
|
|
oauth_callback._code_storage.pop(code, None)
|
|
return JSONResponse(
|
|
status_code=400,
|
|
content={"error": "invalid_grant", "error_description": "Authorization code expired"}
|
|
)
|
|
|
|
# Get the real JWT token
|
|
real_jwt_token = stored_code_data.get("real_jwt_token")
|
|
|
|
if real_jwt_token:
|
|
logger.info("Returning real Clerk JWT token")
|
|
# Clean up used code
|
|
if hasattr(oauth_callback, '_code_storage'):
|
|
oauth_callback._code_storage.pop(code, None)
|
|
|
|
return JSONResponse({
|
|
"access_token": real_jwt_token,
|
|
"token_type": "Bearer",
|
|
"expires_in": 3600,
|
|
"scope": "read search"
|
|
})
|
|
else:
|
|
logger.warning("No real JWT token found, generating mock token")
|
|
# Fallback to mock token for testing
|
|
mock_token = f"mock_clerk_jwt_{auth_code}"
|
|
return JSONResponse({
|
|
"access_token": mock_token,
|
|
"token_type": "Bearer",
|
|
"expires_in": 3600,
|
|
"scope": "read search"
|
|
})
|
|
|
|
except Exception as e:
|
|
logger.exception(f"OAuth callback POST failed: {e}")
|
|
return JSONResponse(
|
|
status_code=500,
|
|
content={"error": "server_error", "error_description": str(e)}
|
|
)
|
|
|
|
@router.post("/token")
|
|
async def token_endpoint(request: Request):
|
|
"""OAuth 2.1 Token Endpoint - exchanges code for Clerk JWT"""
|
|
|
|
# Parse form data
|
|
form_data = await request.form()
|
|
grant_type = form_data.get("grant_type")
|
|
code = form_data.get("code")
|
|
redirect_uri = form_data.get("redirect_uri")
|
|
client_id = form_data.get("client_id")
|
|
code_verifier = form_data.get("code_verifier")
|
|
|
|
logger.info(f"Token exchange - grant_type: {grant_type}")
|
|
logger.info(f"Code: {code[:20] if code else 'None'}...")
|
|
|
|
if grant_type != "authorization_code":
|
|
return JSONResponse(
|
|
status_code=400,
|
|
content={"error": "unsupported_grant_type"}
|
|
)
|
|
|
|
if not code or not redirect_uri:
|
|
return JSONResponse(
|
|
status_code=400,
|
|
content={"error": "invalid_request", "error_description": "Missing code or redirect_uri"}
|
|
)
|
|
|
|
try:
|
|
# Validate authorization code
|
|
if not code.startswith("clerk_auth_"):
|
|
return JSONResponse(
|
|
status_code=400,
|
|
content={"error": "invalid_grant", "error_description": "Invalid authorization code"}
|
|
)
|
|
|
|
# In a real implementation, you would:
|
|
# 1. Validate the code against stored session
|
|
# 2. Extract user info from the session
|
|
# 3. Return the actual Clerk JWT token
|
|
|
|
# Retrieve stored JWT token using authorization code
|
|
stored_code_data = None
|
|
|
|
# Get stored code data from authorization flow
|
|
if hasattr(oauth_callback, '_code_storage'):
|
|
stored_code_data = oauth_callback._code_storage.get(code)
|
|
|
|
if not stored_code_data:
|
|
logger.error(f"No stored data found for authorization code: {code}")
|
|
return JSONResponse(
|
|
status_code=400,
|
|
content={"error": "invalid_grant", "error_description": "Authorization code not found or expired"}
|
|
)
|
|
|
|
# Check if code is expired
|
|
import time
|
|
if time.time() > stored_code_data.get("expires_at", 0):
|
|
logger.error(f"Authorization code expired: {code}")
|
|
# Clean up expired code
|
|
if hasattr(oauth_callback, '_code_storage'):
|
|
oauth_callback._code_storage.pop(code, None)
|
|
return JSONResponse(
|
|
status_code=400,
|
|
content={"error": "invalid_grant", "error_description": "Authorization code expired"}
|
|
)
|
|
|
|
# Get the real JWT token
|
|
real_jwt_token = stored_code_data.get("real_jwt_token")
|
|
|
|
if real_jwt_token:
|
|
logger.info("Returning real Clerk JWT token from /token endpoint")
|
|
# Clean up used code
|
|
if hasattr(oauth_callback, '_code_storage'):
|
|
oauth_callback._code_storage.pop(code, None)
|
|
|
|
return JSONResponse({
|
|
"access_token": real_jwt_token,
|
|
"token_type": "Bearer",
|
|
"expires_in": 3600,
|
|
"scope": "read search"
|
|
})
|
|
else:
|
|
logger.warning("No real JWT token found in /token endpoint, generating mock token")
|
|
# Fallback to mock token for testing
|
|
mock_token = f"mock_clerk_jwt_{code}"
|
|
return JSONResponse({
|
|
"access_token": mock_token,
|
|
"token_type": "Bearer",
|
|
"expires_in": 3600,
|
|
"scope": "read search"
|
|
})
|
|
|
|
except Exception as e:
|
|
logger.exception(f"Token exchange failed: {e}")
|
|
return JSONResponse(
|
|
status_code=500,
|
|
content={"error": "server_error", "error_description": str(e)}
|
|
) |