crypto.py 文件源码

def encrypt_sng(data, key):
    header = Int32ul.build(74) + Int32ul.build(3)
    iv = bytes(16)
    payload = Int32ul.build(len(data))
    payload += zlib.compress(data, zlib.Z_BEST_COMPRESSION)
    encrypted = aes_sng(key, iv).encrypt(pad(payload))[:len(payload)]
    return header + iv + encrypted + bytes(56)