| from Crypto.Cipher import AES | |
| from fastapi import HTTPException | |
| from config.logging_config import logger | |
| def decrypt_data(encrypted_data: bytes, key: bytes) -> bytes: | |
| try: | |
| nonce, ciphertext = encrypted_data[:12], encrypted_data[12:] | |
| cipher = AES.new(key, AES.MODE_GCM, nonce=nonce) | |
| plaintext = cipher.decrypt_and_verify(ciphertext[:-16], ciphertext[-16:]) | |
| return plaintext | |
| except Exception as e: | |
| logger.error(f"Decryption failed: {str(e)}") | |
| raise HTTPException(status_code=400, detail="Invalid encrypted data") |