initial

backend/app/core/security.py

@@ -0,0 +1,44 @@
+"""Security: password hashing + JWT."""
+from __future__ import annotations
+
+from datetime import datetime, timedelta, timezone
+from typing import Any
+
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+
+from app.config import settings
+
+_pwd_ctx = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+
+def hash_password(password: str) -> str:
+    return _pwd_ctx.hash(password)
+
+
+def verify_password(plain: str, hashed: str) -> bool:
+    try:
+        return _pwd_ctx.verify(plain, hashed)
+    except Exception:
+        return False
+
+
+def create_access_token(subject: str, extra: dict[str, Any] | None = None) -> str:
+    now = datetime.now(timezone.utc)
+    payload = {
+        "sub": subject,
+        "iat": now,
+        "exp": now + timedelta(minutes=settings.access_token_expire_minutes),
+        "type": "access",
+    }
+    if extra:
+        payload.update(extra)
+    return jwt.encode(payload, settings.jwt_secret, algorithm=settings.jwt_algorithm)
+
+
+def decode_access_token(token: str) -> dict[str, Any] | None:
+    try:
+        payload = jwt.decode(token, settings.jwt_secret, algorithms=[settings.jwt_algorithm])
+        return payload
+    except JWTError:
+        return None