Phase 7: Auth & Security upgrade (JWT, 2FA, Login UI)

dashboard/backend/auth.py

@@ -0,0 +1,91 @@
+from datetime import datetime, timedelta
+from typing import Optional
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+import pyotp
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer
+import config
+
+# Password handling
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="api/auth/login")
+
+def verify_password(plain_password, hashed_password):
+    return pwd_context.verify(plain_password, hashed_password)
+
+def get_password_hash(password):
+    return pwd_context.hash(password)
+
+def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(minutes=15)
+    to_encode.update({"exp": expire})
+    encoded_jwt = jwt.encode(to_encode, config.SECRET_KEY, algorithm=config.ALGORITHM)
+    return encoded_jwt
+
+async def get_current_user(token: str = Depends(oauth2_scheme)):
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    try:
+        payload = jwt.decode(token, config.SECRET_KEY, algorithms=[config.ALGORITHM])
+        username: str = payload.get("sub")
+        if username is None:
+            raise credentials_exception
+        # In a real app, we'd check DB here. 
+        # For this single-user system, we just check if it matches config.
+        if username != config.ADMIN_USER:
+             raise credentials_exception
+    except JWTError:
+        raise credentials_exception
+    return username
+
+async def get_current_user_ws(token: str):
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+    )
+    try:
+        payload = jwt.decode(token, config.SECRET_KEY, algorithms=[config.ALGORITHM])
+        username: str = payload.get("sub")
+        if username is None or username != config.ADMIN_USER:
+            raise credentials_exception
+    except JWTError:
+        raise credentials_exception
+    return username
+
+# TOTP Persistenceturn username
+
+# TOTP Persistence
+AUTH_FILE = config.VOLUME_ROOT + "/docker/nas-dashboard/auth.json"
+
+def load_totp_secret():
+    try:
+        import json
+        if os.path.exists(AUTH_FILE):
+            with open(AUTH_FILE, "r") as f:
+                data = json.load(f)
+                return data.get("totp_secret", "")
+    except Exception:
+        pass
+    return config.TOTP_SECRET
+
+def save_totp_secret(secret: str):
+    import json
+    os.makedirs(os.path.dirname(AUTH_FILE), exist_ok=True)
+    with open(AUTH_FILE, "w") as f:
+        json.dump({"totp_secret": secret}, f)
+        
+def verify_totp(token: str, secret: str = None):
+    if secret is None:
+        secret = load_totp_secret()
+    if not secret:
+        return True # 2FA not enabled
+    totp = pyotp.TOTP(secret)
+    return totp.verify(token)