67 lines
2.1 KiB
Python
67 lines
2.1 KiB
Python
import os
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import bcrypt
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from datetime import datetime, timedelta, timezone
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from jose import JWTError, jwt
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from fastapi import Depends, HTTPException, status, Request
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from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from .database import get_db
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from .models import User
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SECRET_KEY = os.getenv("SECRET_KEY", "skift-mig-til-en-sikker-noegle")
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ALGORITHM = "HS256"
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TOKEN_EXPIRE_DAYS = 30
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bearer_scheme = 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: str, hashed: str) -> bool:
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return bcrypt.checkpw(plain.encode("utf-8"), hashed.encode("utf-8"))
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def create_token(username: str, role: str) -> str:
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expire = datetime.now(timezone.utc) + timedelta(days=TOKEN_EXPIRE_DAYS)
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payload = {"sub": username, "role": role, "exp": expire}
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return jwt.encode(payload, SECRET_KEY, algorithm=ALGORITHM)
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def decode_token(token: str) -> dict | None:
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try:
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return jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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except JWTError:
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return None
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async def get_current_user(
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request: Request,
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credentials: HTTPAuthorizationCredentials | None = Depends(bearer_scheme),
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db: AsyncSession = Depends(get_db),
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) -> User | None:
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"""Return the current user, or None if not authenticated.
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Checks both Authorization header and cookie."""
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token = None
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if credentials:
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token = credentials.credentials
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if not token:
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token = request.cookies.get("token")
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if not token:
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return None
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payload = decode_token(token)
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if not payload:
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return None
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result = await db.execute(select(User).where(User.username == payload["sub"]))
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return result.scalar_one_or_none()
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async def require_admin(user: User | None = Depends(get_current_user)) -> User:
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if not user or user.role != "admin":
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Admin login required",
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)
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return user |