daddy
7ecf0d53bd
checkpoint / checkpoint (push) Failing after 3h14m9s
- Creator Studio: Visual behavior & property inspector, GLB model importer, binary persistence - Trust & Safety: 18+ TOS confirmation (DOB removed), creator guidelines & briefing card on join, in-game reporting HUD - Test Harness: Add --filter, --skip-backend, --skip-godot to run_checkpoint_tests.py
327 lines
10 KiB
Python
327 lines
10 KiB
Python
"""Authentication router - login, register, token refresh."""
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import uuid
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from datetime import date, datetime, timedelta, timezone
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from fastapi import APIRouter, Depends, HTTPException, status
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from fastapi.security import OAuth2PasswordRequestForm
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from pydantic import BaseModel, EmailStr
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.config import settings
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from app.database import get_db
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from app.dependencies import CurrentUser
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from app.models.session import RefreshToken
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from app.models.user import User
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from app.rate_limit import auth_rate_limit
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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router = APIRouter()
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## Minimum age to register. This platform is adults-only.
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MIN_AGE = 18
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# --- Pydantic schemas ---
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class TokenResponse(BaseModel):
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access_token: str
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refresh_token: str
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token_type: str = "bearer"
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access_token_expires_minutes: int
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class RefreshRequest(BaseModel):
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refresh_token: str
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class RegisterRequest(BaseModel):
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username: str
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email: EmailStr
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password: str
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# ModBison is an adults-only platform (18+). Users confirm agreement with
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# 18+ Terms of Service. Date of birth is optional / deprecated.
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over_18: bool = True
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date_of_birth: date | None = None
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class UserResponse(BaseModel):
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id: int
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username: str
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email: str
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date_of_birth: date | None = None
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is_active: bool
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created_at: datetime | None = None
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model_config = {"from_attributes": True}
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# --- Helpers ---
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def _create_access_token(data: dict) -> str:
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"""Create a signed access token using RS256.
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Includes a unique ``jti`` claim so that concurrent/same-second calls
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(e.g. back-to-back /refresh requests) still produce distinct tokens —
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without it, two tokens minted for the same user within the same
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second are byte-identical since ``sub``/``exp`` are the only claims.
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"""
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to_encode = data.copy()
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to_encode["jti"] = str(uuid.uuid4())
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expire = datetime.now(timezone.utc) + timedelta(
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minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
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)
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to_encode.update({"exp": expire})
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return jwt.encode(
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to_encode,
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settings.private_pem,
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algorithm=settings.ALGORITHM,
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)
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def _create_refresh_token(data: dict) -> str:
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"""Create a signed refresh token using RS256.
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Includes a unique ``jti`` claim so that concurrent calls produce
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distinct tokens even when issued within the same second.
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"""
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to_encode = data.copy()
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to_encode["jti"] = str(uuid.uuid4())
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expire = datetime.now(timezone.utc) + timedelta(
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days=settings.REFRESH_TOKEN_EXPIRE_DAYS
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)
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to_encode.update({"exp": expire})
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return jwt.encode(
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to_encode,
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settings.private_pem,
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algorithm=settings.ALGORITHM,
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)
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""Verify a plain password against a hash."""
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return pwd_context.verify(plain_password, hashed_password)
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def hash_password(password: str) -> str:
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"""Hash a password."""
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return pwd_context.hash(password)
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def calculate_age(birth_date: date, today: date | None = None) -> int:
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"""Calculate age in years from a birth date.
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Used by /register (PC3 Phase 3) to compute age from the submitted
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date_of_birth and enforce the 18+ gate. See
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docs/architecture/content_moderation.md 5.2.
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Args:
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birth_date: The person's date of birth.
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today: The reference date. Defaults to today's date (UTC).
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Returns:
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Age in whole years as of the reference date.
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"""
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if today is None:
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today = datetime.now(timezone.utc).date()
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age = today.year - birth_date.year
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# Adjust if birthday hasn't occurred yet this year
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if (today.month, today.day) < (birth_date.month, birth_date.day):
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age -= 1
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return age
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def _issue_refresh_token(user_id: int, db: AsyncSession) -> str:
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"""Create and persist a refresh token for the given user."""
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refresh_token_value = _create_refresh_token({"sub": str(user_id)})
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refresh_token_record = RefreshToken(
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id=str(uuid.uuid4()),
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user_id=user_id,
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token=refresh_token_value,
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expires_at=datetime.now(timezone.utc)
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+ timedelta(days=settings.REFRESH_TOKEN_EXPIRE_DAYS),
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)
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db.add(refresh_token_record)
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return refresh_token_value
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# --- Endpoints ---
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@router.post("/register", response_model=TokenResponse, status_code=status.HTTP_201_CREATED,
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dependencies=[Depends(auth_rate_limit)])
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async def register(req: RegisterRequest, db: AsyncSession = Depends(get_db)):
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"""Register a new user and return access + refresh tokens.
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Requires confirming 18+ TOS agreement. If a date of birth is supplied,
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verifies the user is >= MIN_AGE (18).
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"""
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if req.date_of_birth is not None:
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age = calculate_age(req.date_of_birth)
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if age < 0 or req.date_of_birth > date.today():
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raise HTTPException(
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status_code=status.HTTP_400_BAD_REQUEST,
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detail="Invalid date of birth",
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)
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if age < MIN_AGE:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail=f"You must be at least {MIN_AGE} to use this platform",
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)
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elif not req.over_18:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="You must confirm you are 18 or older to register",
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)
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# Check if username already exists
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result = await db.execute(select(User).where(User.username == req.username))
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if result.scalar_one_or_none():
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raise HTTPException(
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status_code=status.HTTP_409_CONFLICT,
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detail="Username already registered",
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)
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# Check if email already exists
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result = await db.execute(select(User).where(User.email == req.email))
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if result.scalar_one_or_none():
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raise HTTPException(
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status_code=status.HTTP_409_CONFLICT,
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detail="Email already registered",
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)
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user = User(
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username=req.username,
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email=req.email,
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hashed_password=hash_password(req.password),
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date_of_birth=req.date_of_birth,
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)
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db.add(user)
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await db.flush() # flush to get user.id before creating refresh token
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await db.refresh(user)
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# Create access token
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access_token = _create_access_token({"sub": str(user.id)})
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# Create and persist refresh token
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refresh_token_value = _issue_refresh_token(user.id, db)
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await db.commit()
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return TokenResponse(
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access_token=access_token,
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refresh_token=refresh_token_value,
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access_token_expires_minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES,
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)
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@router.post("/login", response_model=TokenResponse, dependencies=[Depends(auth_rate_limit)])
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async def login(form: OAuth2PasswordRequestForm = Depends(), db: AsyncSession = Depends(get_db)):
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"""Authenticate user and return access + refresh tokens.
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Accepts form-encoded credentials (username/password) as expected by
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OAuth2PasswordBearer, so the Swagger UI "Authorize" flow works correctly.
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"""
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result = await db.execute(select(User).where(User.username == form.username))
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user = result.scalar_one_or_none()
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if not user or not verify_password(form.password, user.hashed_password):
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Incorrect username or password",
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)
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if not user.is_active:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="User account is inactive",
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)
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# Create access token
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access_token = _create_access_token({"sub": str(user.id)})
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# Create and persist refresh token
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refresh_token_value = _issue_refresh_token(user.id, db)
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await db.commit()
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return TokenResponse(
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access_token=access_token,
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refresh_token=refresh_token_value,
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access_token_expires_minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES,
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)
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@router.post("/refresh", response_model=TokenResponse)
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async def refresh(req: RefreshRequest, db: AsyncSession = Depends(get_db)):
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"""Exchange a valid refresh token for a new access token.
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Validates the refresh token against the database:
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- Must exist in the refresh_tokens table
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- Must not be expired (expires_at > now)
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- Must be active (is_active == true)
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On success, returns a new access token. The refresh token itself is
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NOT rotated (the client keeps using the same refresh token).
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"""
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Invalid or expired refresh token",
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)
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# Step 1: Decode and validate the JWT signature/claims
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try:
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payload = jwt.decode(
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req.refresh_token,
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settings.public_pem,
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algorithms=[settings.ALGORITHM],
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)
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except JWTError:
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raise credentials_exception
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user_id_str: str | None = payload.get("sub")
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if user_id_str is None:
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raise credentials_exception
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try:
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user_id = int(user_id_str)
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except (ValueError, TypeError):
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raise credentials_exception
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# Step 2: Look up the refresh token in the database
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result = await db.execute(
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select(RefreshToken).where(
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RefreshToken.token == req.refresh_token,
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RefreshToken.user_id == user_id,
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)
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)
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stored_token = result.scalar_one_or_none()
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if stored_token is None:
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raise credentials_exception
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# Step 3: Check if the token is expired
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if datetime.now(timezone.utc) >= stored_token.expires_at:
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raise credentials_exception
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# Step 4: Check if the token is active
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if not stored_token.is_active:
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raise credentials_exception
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# Step 5: Issue a new access token
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access_token = _create_access_token({"sub": str(user_id)})
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return TokenResponse(
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access_token=access_token,
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refresh_token=req.refresh_token, # Return the same refresh token
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access_token_expires_minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES,
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)
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@router.get("/me", response_model=UserResponse)
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async def get_current_user(current_user: CurrentUser):
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"""Get current user profile from the JWT token."""
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return current_user
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