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# -*- coding: utf-8 -*-
from __future__ import absolute_import, unicode_literals
from wechatpy.utils import to_binary, byte2int
class PKCS7Encoder(object):
block_size = 32
@classmethod
def encode(cls, text):
length = len(text)
padding_count = cls.block_size - length % cls.block_size
if padding_count == 0:
padding_count = cls.block_size
padding = to_binary(chr(padding_count))
return text + padding * padding_count
def decode(cls, decrypted):
padding = byte2int(decrypted[-1])
if padding < 1 or padding > 32:
padding = 0
return decrypted[:-padding]
jxtech /
wechatpy
