github-actions[bot]
f9fcc7adab
date: 2026-06-28T09:48:35 master commit: da6313dbe95b3f24bb5d8018b0e5f950f5823ca7
35 lines
1.1 KiB
Python
35 lines
1.1 KiB
Python
"""
|
|
Copyright (c) 2021-, Haibin Wen, sunnypilot, and a number of other contributors.
|
|
|
|
This file is part of sunnypilot and is licensed under the MIT License.
|
|
See the LICENSE.md file in the root directory for more details.
|
|
"""
|
|
|
|
from Crypto.Cipher import AES
|
|
|
|
|
|
class AESCipher:
|
|
def __init__(self, key: bytes, iv: bytes):
|
|
if len(key) not in (16, 32):
|
|
raise ValueError("Key must be 16 bytes (AES-128) or 32 bytes (AES-256).")
|
|
if len(iv) != 16:
|
|
raise ValueError("IV must be 16 bytes.")
|
|
|
|
self.key = key
|
|
self.iv = iv
|
|
|
|
def encrypt(self, data: bytes) -> bytes:
|
|
block_size = 16
|
|
padding_length = block_size - (len(data) % block_size)
|
|
padding = bytes([padding_length]) * padding_length
|
|
padded_data = data + padding
|
|
|
|
cipher = AES.new(self.key, AES.MODE_CBC, self.iv)
|
|
return cipher.encrypt(padded_data)
|
|
|
|
def decrypt(self, encrypted_data: bytes) -> bytes:
|
|
cipher = AES.new(self.key, AES.MODE_CBC, self.iv)
|
|
decrypted_data = cipher.decrypt(encrypted_data)
|
|
padding_length = decrypted_data[-1]
|
|
return decrypted_data[:-padding_length]
|