a2190801e8
- POST /auth/register - create account - POST /auth/login - get JWT token - GET /auth/me - get current user - POST /auth/verify - verify token (for L1) - Password hashing with bcrypt - 30-day JWT tokens 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
162 lines
3.8 KiB
Python
162 lines
3.8 KiB
Python
"""
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Authentication for Art DAG L2 Server.
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User registration, login, and JWT tokens.
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"""
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import json
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import os
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import secrets
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from datetime import datetime, timezone, timedelta
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from pathlib import Path
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from typing import Optional
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from passlib.context import CryptContext
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from jose import JWTError, jwt
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from pydantic import BaseModel
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# Password hashing
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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# JWT settings
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SECRET_KEY = os.environ.get("JWT_SECRET", secrets.token_hex(32))
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_DAYS = 30
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class User(BaseModel):
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"""A registered user."""
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username: str
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password_hash: str
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created_at: str
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email: Optional[str] = None
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class UserCreate(BaseModel):
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"""Request to register a user."""
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username: str
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password: str
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email: Optional[str] = None
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class UserLogin(BaseModel):
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"""Request to login."""
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username: str
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password: str
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class Token(BaseModel):
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"""JWT token response."""
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access_token: str
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token_type: str = "bearer"
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username: str
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expires_at: str
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def get_users_path(data_dir: Path) -> Path:
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"""Get users file path."""
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return data_dir / "users.json"
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def load_users(data_dir: Path) -> dict[str, dict]:
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"""Load users from disk."""
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path = get_users_path(data_dir)
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if path.exists():
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with open(path) as f:
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return json.load(f)
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return {}
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def save_users(data_dir: Path, users: dict[str, dict]):
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"""Save users to disk."""
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path = get_users_path(data_dir)
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with open(path, "w") as f:
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json.dump(users, f, indent=2)
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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 verify_password(plain_password: str, hashed_password: str) -> bool:
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"""Verify a password against its hash."""
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return pwd_context.verify(plain_password, hashed_password)
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def create_user(data_dir: Path, username: str, password: str, email: Optional[str] = None) -> User:
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"""Create a new user."""
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users = load_users(data_dir)
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if username in users:
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raise ValueError(f"Username already exists: {username}")
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user = User(
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username=username,
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password_hash=hash_password(password),
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created_at=datetime.now(timezone.utc).isoformat(),
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email=email
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)
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users[username] = user.model_dump()
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save_users(data_dir, users)
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return user
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def authenticate_user(data_dir: Path, username: str, password: str) -> Optional[User]:
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"""Authenticate a user by username and password."""
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users = load_users(data_dir)
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if username not in users:
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return None
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user_data = users[username]
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if not verify_password(password, user_data["password_hash"]):
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return None
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return User(**user_data)
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def create_access_token(username: str) -> Token:
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"""Create a JWT access token."""
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expires = datetime.now(timezone.utc) + timedelta(days=ACCESS_TOKEN_EXPIRE_DAYS)
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payload = {
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"sub": username,
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"exp": expires,
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"iat": datetime.now(timezone.utc)
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}
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token = jwt.encode(payload, SECRET_KEY, algorithm=ALGORITHM)
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return Token(
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access_token=token,
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username=username,
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expires_at=expires.isoformat()
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)
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def verify_token(token: str) -> Optional[str]:
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"""Verify a JWT token, return username if valid."""
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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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username = payload.get("sub")
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return username
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except JWTError:
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return None
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def get_current_user(data_dir: Path, token: str) -> Optional[User]:
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"""Get current user from token."""
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username = verify_token(token)
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if not username:
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return None
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users = load_users(data_dir)
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if username not in users:
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return None
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return User(**users[username])
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