app backend prima

app/core/security.py

@@ -0,0 +1,46 @@
+from datetime import datetime, timedelta, timezone
+from typing import Optional
+
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+
+from app.core.config import settings
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    """Verifica una password contro il suo hash"""
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password: str) -> str:
+    """Genera l'hash di una password"""
+    # bcrypt ha un limite di 72 byte, tronchiamo se necessario
+    # Questo è sicuro perché 72 byte forniscono comunque entropia sufficiente
+    if len(password.encode('utf-8')) > 72:
+        password = password.encode('utf-8')[:72].decode('utf-8', errors='ignore')
+    return pwd_context.hash(password)
+
+
+def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
+    """Crea un JWT token"""
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.now(timezone.utc) + expires_delta
+    else:
+        expire = datetime.now(timezone.utc) + timedelta(
+            minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
+        )
+    to_encode.update({"exp": expire})
+    encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
+    return encoded_jwt
+
+
+def decode_access_token(token: str) -> Optional[dict]:
+    """Decodifica e valida un JWT token"""
+    try:
+        payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])
+        return payload
+    except JWTError:
+        return None