cloud_decrypt.py 文件源码

def generate_keys(path):
    salt = '5dIFp5Nb8n1kyPRSU8dKGyhJHx317PA3'
    keyOffsets = [8, 25, 22, 47, 24,  5, 16,  9, 33,  3, 45,  1, 30, 34, 37, 36,
                  15, 39, 11, 14, 23, 29, 26, 40, 31,  7, 13, 38, 27, 17, 12, 21]
    ivOffsets  = [28, 19, 2,  46, 4,  20, 18, 41, 32, 43, 0,  6,  44, 10, 35, 42]
    filename = basename(path)

    toHash = salt + filename + salt + filename
    hashed = bytes(hashlib.sha384(toHash.encode('ASCII')).digest())
    key = [0] * 32
    for offset, i in zip(keyOffsets, range(32)):
        key[i] = hashed[offset]

    iv = bytearray([0]*16)
    for offset, i in zip(ivOffsets, range(16)):
        iv[i] = hashed[offset]
    iv = bytes(iv)

    iv = unpack('<Q', iv[:8])[0] | (unpack('<Q', iv[8:])[0] << 64)

    return key, iv