EV 충전 플랫폼 초기 백업

app/services/auth.py

@@ -0,0 +1,113 @@
+"""인증 서비스 — JWT 토큰 + 비밀번호 해싱"""
+
+from datetime import datetime, timezone, timedelta
+from typing import Optional
+
+from fastapi import Depends, HTTPException, status
+from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.config import get_settings
+from app.database import get_db
+from app.models import User, UserRole
+
+settings = get_settings()
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+security = HTTPBearer(auto_error=False)
+
+
+# ── 비밀번호 ──
+
+def hash_password(password: str) -> str:
+    return pwd_context.hash(password)
+
+
+def verify_password(plain: str, hashed: str) -> bool:
+    return pwd_context.verify(plain, hashed)
+
+
+# ── JWT 토큰 ──
+
+def create_token(user_id: int, username: str, role: str) -> str:
+    expire = datetime.now(timezone.utc) + timedelta(
+        minutes=settings.JWT_EXPIRE_MINUTES
+    )
+    payload = {
+        "sub": str(user_id),
+        "username": username,
+        "role": role,
+        "exp": expire,
+    }
+    return jwt.encode(payload, settings.JWT_SECRET, algorithm=settings.JWT_ALGORITHM)
+
+
+def decode_token(token: str) -> Optional[dict]:
+    try:
+        payload = jwt.decode(
+            token, settings.JWT_SECRET, algorithms=[settings.JWT_ALGORITHM]
+        )
+        return payload
+    except JWTError:
+        return None
+
+
+# ── FastAPI 인증 의존성 ──
+
+async def get_current_user(
+    credentials: Optional[HTTPAuthorizationCredentials] = Depends(security),
+    db: AsyncSession = Depends(get_db),
+) -> User:
+    """현재 로그인된 사용자 반환 — 인증 필수 엔드포인트에 사용"""
+    if not credentials:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="인증이 필요합니다",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+
+    payload = decode_token(credentials.credentials)
+    if not payload:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="유효하지 않은 토큰입니다",
+        )
+
+    user_id = int(payload.get("sub", 0))
+    result = await db.execute(select(User).where(User.id == user_id))
+    user = result.scalar_one_or_none()
+
+    if not user or not user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="비활성화된 계정입니다",
+        )
+
+    return user
+
+
+async def require_admin(user: User = Depends(get_current_user)) -> User:
+    """관리자 권한 필수"""
+    if user.role != UserRole.ADMIN:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="관리자 권한이 필요합니다",
+        )
+    return user
+
+
+async def optional_auth(
+    credentials: Optional[HTTPAuthorizationCredentials] = Depends(security),
+    db: AsyncSession = Depends(get_db),
+) -> Optional[User]:
+    """인증 선택 — 토큰 있으면 사용자 반환, 없으면 None"""
+    if not credentials:
+        return None
+    payload = decode_token(credentials.credentials)
+    if not payload:
+        return None
+    user_id = int(payload.get("sub", 0))
+    result = await db.execute(select(User).where(User.id == user_id))
+    return result.scalar_one_or_none()