feat: add back files in new location

2025-03-21 14:48:55 +01:00
parent b28752830a
commit d9ad903798
6 changed files with 900 additions and 0 deletions
--- a/cutt/security.py
+++ b/cutt/security.py
@@ -0,0 +1,318 @@
+from datetime import timedelta, timezone, datetime
+from typing import Annotated
+from fastapi import Depends, HTTPException, Request, Response, status
+from fastapi.responses import PlainTextResponse
+from pydantic import BaseModel, ValidationError
+import jwt
+from jwt.exceptions import ExpiredSignatureError, InvalidTokenError
+from sqlmodel import Session, select
+from cutt.db import TokenDB, engine, Player
+from fastapi.security import (
+    OAuth2PasswordBearer,
+    OAuth2PasswordRequestForm,
+    SecurityScopes,
+)
+from pydantic_settings import BaseSettings, SettingsConfigDict
+from passlib.context import CryptContext
+from sqlalchemy.exc import OperationalError
+
+
+class Config(BaseSettings):
+    secret_key: str = ""
+    access_token_expire_minutes: int = 15
+    model_config = SettingsConfigDict(
+        env_file=".env", env_file_encoding="utf-8", extra="ignore"
+    )
+
+
+config = Config()
+
+
+class Token(BaseModel):
+    access_token: str
+
+
+class TokenData(BaseModel):
+    username: str | None = None
+    scopes: list[str] = []
+
+
+pwd_context = CryptContext(schemes=["argon2"], deprecated="auto")
+
+
+class CookieOAuth2(OAuth2PasswordBearer):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+    async def __call__(self, request: Request):
+        cookie_token = request.cookies.get("access_token")
+        if cookie_token:
+            return cookie_token
+        else:
+            header_token = await super().__call__(request)
+            if header_token:
+                return header_token
+            else:
+                raise HTTPException(status_code=401)
+
+
+oauth2_scheme = CookieOAuth2(
+    tokenUrl="api/token",
+    scopes={
+        "analysis": "Access the results.",
+        "admin": "Maintain DB etc.",
+    },
+)
+
+
+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 get_user(username: str | None):
+    if username:
+        try:
+            with Session(engine) as session:
+                return session.exec(
+                    select(Player).where(Player.username == username)
+                ).one_or_none()
+        except OperationalError:
+            return
+
+
+def authenticate_user(username: str, password: str):
+    user = get_user(username)
+    if not user:
+        return False
+    if not verify_password(password, user.hashed_password):
+        return False
+    return user
+
+
+def create_access_token(data: dict, expires_delta: timedelta | None = None):
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.now(timezone.utc) + expires_delta
+    else:
+        expire = datetime.now(timezone.utc) + timedelta(
+            minutes=config.access_token_expire_minutes
+        )
+    to_encode.update({"exp": expire})
+    encoded_jwt = jwt.encode(to_encode, config.secret_key, algorithm="HS256")
+    return encoded_jwt
+
+
+async def get_current_user(
+    token: Annotated[str, Depends(oauth2_scheme)],
+    security_scopes: SecurityScopes,
+):
+    if security_scopes.scopes:
+        authenticate_value = f'Bearer scope="{security_scopes.scope_str}"'
+    else:
+        authenticate_value = "Bearer"
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": authenticate_value},
+    )
+    # access_token = request.cookies.get("access_token")
+    access_token = token
+    if not access_token:
+        raise credentials_exception
+    try:
+        payload = jwt.decode(access_token, config.secret_key, algorithms=["HS256"])
+        username: str = payload.get("sub")
+        if username is None:
+            raise credentials_exception
+        token_scopes = payload.get("scopes", [])
+        token_data = TokenData(username=username, scopes=token_scopes)
+    except ExpiredSignatureError:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Access token expired",
+            headers={"WWW-Authenticate": authenticate_value},
+        )
+    except (InvalidTokenError, ValidationError):
+        raise credentials_exception
+    user = get_user(username=token_data.username)
+    if user is None:
+        raise credentials_exception
+    allowed_scopes = set(user.scopes.split())
+    for scope in security_scopes.scopes:
+        if scope not in allowed_scopes or scope not in token_data.scopes:
+            raise HTTPException(
+                status_code=status.HTTP_401_UNAUTHORIZED,
+                detail="Not enough permissions",
+                headers={"WWW-Authenticate": authenticate_value},
+            )
+    return user
+
+
+async def get_current_active_user(
+    current_user: Annotated[Player, Depends(get_current_user)],
+):
+    if current_user.disabled:
+        raise HTTPException(status_code=400, detail="Inactive user")
+    return current_user
+
+
+class TeamScopedRequest(BaseModel):
+    user: Player
+    team_id: int
+
+
+async def verify_team_scope(
+    team_id: int, user: Annotated[Player, Depends(get_current_active_user)]
+):
+    allowed_scopes = set(user.scopes.split())
+    if f"team:{team_id}" not in allowed_scopes:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Not enough permissions",
+        )
+    else:
+        return TeamScopedRequest(user=user, team_id=team_id)
+
+
+async def login_for_access_token(
+    form_data: Annotated[OAuth2PasswordRequestForm, Depends()], response: Response
+) -> Token:
+    user = authenticate_user(form_data.username, form_data.password)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect username or password",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    allowed_scopes = set(user.scopes.split())
+    requested_scopes = set(form_data.scopes)
+    access_token = create_access_token(
+        data={"sub": user.username, "scopes": list(allowed_scopes)}
+    )
+    response.set_cookie(
+        "access_token",
+        value=access_token,
+        httponly=True,
+        samesite="strict",
+        max_age=config.access_token_expire_minutes * 60,
+    )
+    return Token(access_token=access_token)
+
+
+async def logout(response: Response):
+    response.set_cookie("access_token", "", expires=0, httponly=True, samesite="strict")
+    return {"message": "Successfully logged out"}
+
+
+def generate_one_time_token(username):
+    user = get_user(username)
+    if user:
+        expire = timedelta(days=7)
+        token = create_access_token(
+            data={"sub": username, "name": user.display_name},
+            expires_delta=expire,
+        )
+        return token
+
+
+class FirstPassword(BaseModel):
+    token: str
+    password: str
+
+
+async def set_first_password(req: FirstPassword):
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate token",
+    )
+    with Session(engine) as session:
+        token_in_db = session.exec(
+            select(TokenDB)
+            .where(TokenDB.token == req.token)
+            .where(TokenDB.used == False)
+        ).one_or_none()
+        if token_in_db:
+            credentials_exception = HTTPException(
+                status_code=status.HTTP_401_UNAUTHORIZED,
+                detail="Could not validate token",
+            )
+            try:
+                payload = jwt.decode(req.token, config.secret_key, algorithms=["HS256"])
+                username: str = payload.get("sub")
+                if username is None:
+                    raise credentials_exception
+            except ExpiredSignatureError:
+                raise HTTPException(
+                    status_code=status.HTTP_401_UNAUTHORIZED,
+                    detail="Access token expired",
+                )
+            except (InvalidTokenError, ValidationError):
+                raise credentials_exception
+
+            user = get_user(username)
+            if user:
+                user.hashed_password = get_password_hash(req.password)
+                session.add(user)
+                token_in_db.used = True
+                session.add(token_in_db)
+                session.commit()
+                return Response(
+                    "Password set successfully", status_code=status.HTTP_200_OK
+                )
+        elif session.exec(
+            select(TokenDB)
+            .where(TokenDB.token == req.token)
+            .where(TokenDB.used == True)
+        ).one_or_none():
+            raise HTTPException(
+                status_code=status.HTTP_401_UNAUTHORIZED,
+                detail="Token already used",
+            )
+        else:
+            raise credentials_exception
+
+
+class ChangedPassword(BaseModel):
+    current_password: str
+    new_password: str
+
+
+async def change_password(
+    request: ChangedPassword,
+    user: Annotated[Player, Depends(get_current_active_user)],
+):
+    if (
+        request.new_password
+        and user.hashed_password
+        and verify_password(request.current_password, user.hashed_password)
+    ):
+        with Session(engine) as session:
+            user.hashed_password = get_password_hash(request.new_password)
+            session.add(user)
+            session.commit()
+            return PlainTextResponse(
+                "Password changed successfully",
+                status_code=status.HTTP_200_OK,
+                media_type="text/plain",
+            )
+    else:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Wrong password",
+        )
+
+
+async def read_player_me(
+    current_user: Annotated[Player, Depends(get_current_active_user)],
+):
+    return current_user.model_dump(exclude={"hashed_password", "disabled"})
+
+
+async def read_own_items(
+    current_user: Annotated[Player, Depends(get_current_active_user)],
+):
+    return [{"item_id": "Foo", "owner": current_user.username}]