oimwiodev
d1160673a7
Self-hosted P&L tracking app with component-level pricing. Offers: Atlas/Atlas+/Rif/Rif+ with granular cost breakdown. API + MCP + multi-user auth.
112 lines
3.4 KiB
Python
112 lines
3.4 KiB
Python
"""Authentication: password hashing, JWT tokens, and FastAPI dependencies."""
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import os
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from datetime import datetime, timedelta, timezone
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from typing import Optional
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import bcrypt
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from fastapi import Depends, HTTPException, Request, status
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from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
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from jose import JWTError, jwt
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from sqlalchemy.orm import Session
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from database import get_db
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from models import User
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# Secret key for JWT signing (generate a random one if not set)
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SECRET_KEY = os.environ.get("JWT_SECRET", "bestof-manager-secret-key-change-in-production")
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_HOURS = 24
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security = HTTPBearer(auto_error=False)
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def hash_password(password: str) -> str:
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return bcrypt.hashpw(password.encode("utf-8"), bcrypt.gensalt()).decode("utf-8")
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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return bcrypt.checkpw(plain_password.encode("utf-8"), hashed_password.encode("utf-8"))
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def create_access_token(user_id: int, role: str) -> str:
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expire = datetime.now(timezone.utc) + timedelta(hours=ACCESS_TOKEN_EXPIRE_HOURS)
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payload = {
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"sub": str(user_id),
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"role": role,
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"exp": expire,
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}
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return jwt.encode(payload, SECRET_KEY, algorithm=ALGORITHM)
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def _decode_token(token: str) -> Optional[dict]:
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"""Try to decode a JWT token, return payload or None."""
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try:
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return jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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except (JWTError, ValueError, TypeError):
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return None
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def _token_to_user(token: str, db: Session) -> Optional[User]:
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"""Given a token string, return User or None."""
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payload = _decode_token(token)
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if payload is None:
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return None
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try:
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user_id = int(payload.get("sub"))
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except (ValueError, TypeError):
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return None
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return db.query(User).filter(User.id == user_id).first()
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def get_current_user(
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credentials: HTTPAuthorizationCredentials = Depends(security),
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db: Session = Depends(get_db),
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) -> User:
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"""FastAPI dependency: validates JWT Bearer token and returns the current User."""
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if credentials is None:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Not authenticated",
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)
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user = _token_to_user(credentials.credentials, db)
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if user is None:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Invalid or expired token",
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)
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return user
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def get_page_user(
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request: Request,
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db: Session = Depends(get_db),
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) -> Optional[User]:
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"""FastAPI dependency for page routes: checks cookie first, then Bearer header.
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Returns None (not 401) if not authenticated — caller should redirect to /login.
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"""
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token = request.cookies.get("token")
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if token:
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user = _token_to_user(token, db)
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if user:
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return user
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# Fallback: check Authorization header (for AJAX page loads)
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auth = request.headers.get("Authorization")
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if auth and auth.startswith("Bearer "):
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user = _token_to_user(auth[7:], db)
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if user:
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return user
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return None
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def require_admin(current_user: User = Depends(get_current_user)) -> User:
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"""FastAPI dependency: requires admin role."""
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if current_user.role != "admin":
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="Admin access required",
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)
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return current_user
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