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backend/app/utils/__init__.py

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+

backend/app/utils/security.py

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+import bcrypt
+from datetime import UTC, datetime, timedelta
+from typing import Any
+
+from jose import JWTError, jwt
+
+from app.config import settings
+
+ALGORITHM = "HS256"
+
+
+def hash_password(password: str) -> str:
+    return bcrypt.hashpw(password.encode(), bcrypt.gensalt()).decode()
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    return bcrypt.checkpw(plain_password.encode(), hashed_password.encode())
+
+
+def create_access_token(subject: str, expires_delta: timedelta | None = None) -> str:
+    expire = datetime.now(UTC) + (
+        expires_delta or timedelta(minutes=settings.access_token_expire_minutes)
+    )
+    payload = {"sub": subject, "exp": expire, "type": "access"}
+    return jwt.encode(payload, settings.secret_key, algorithm=ALGORITHM)
+
+
+def create_refresh_token(subject: str) -> str:
+    expire = datetime.now(UTC) + timedelta(days=settings.refresh_token_expire_days)
+    payload = {"sub": subject, "exp": expire, "type": "refresh"}
+    return jwt.encode(payload, settings.secret_key, algorithm=ALGORITHM)
+
+
+def decode_token(token: str) -> dict[str, Any]:
+    return jwt.decode(token, settings.secret_key, algorithms=[ALGORITHM])
+
+
+def verify_token(token: str, expected_type: str = "access") -> str | None:
+    try:
+        payload = decode_token(token)
+        if payload.get("type") != expected_type:
+            return None
+        subject = payload.get("sub")
+        return subject if isinstance(subject, str) else None
+    except JWTError:
+        return None