├── .gitignore ├── LICENSE ├── README.md ├── Sample.py ├── WXBizMsgCrypt.py ├── freeze.sh ├── ierror.py └── requirements.txt /.gitignore: -------------------------------------------------------------------------------- 1 | .idea 2 | venv 3 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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Here I write a python3 version. 4 | 5 | 微信提供的官方python[加解密代码](http://mp.weixin.qq.com/wiki/6/90f7259c0d0739bbb41d9f4c4c8e59a2.html) 只能用于python2。这里我重写了一个python3版本。 6 | 7 | 8 | 9 | If this software violates your copyright, please let me know at chenjianjx@gmail.com 10 | 11 | 如果这个程序侵犯你的版权，请与chenjianjx@gmail.com联系。 -------------------------------------------------------------------------------- /Sample.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python 2 | # -*- coding: utf-8 -*- 3 | ######################################################################### 4 | # Author: jonyqin 5 | # Created Time: Thu 11 Sep 2014 03:55:41 PM CST 6 | # File Name: demo.py 7 | # Description: WXBizMsgCrypt 使用demo文件 8 | ######################################################################### 9 | from WXBizMsgCrypt import WXBizMsgCrypt 10 | if __name__ == "__main__": 11 | """ 12 | 1.第三方回复加密消息给公众平台； 13 | 2.第三方收到公众平台发送的消息，验证消息的安全性，并对消息进行解密。 14 | """ 15 | encodingAESKey = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFG" 16 | to_xml = """ 1407743423 """ 17 | token = "spamtest" 18 | nonce = "1320562132" 19 | appid = "wx2c2769f8efd9abc2" 20 | #测试加密接口 21 | encryp_test = WXBizMsgCrypt(token,encodingAESKey,appid) 22 | ret,encrypt_xml = encryp_test.EncryptMsg(to_xml,nonce) 23 | print(ret,encrypt_xml) 24 | 25 | 26 | #测试解密接口 27 | timestamp = "1409735669" 28 | msg_sign = "5d197aaffba7e9b25a30732f161a50dee96bd5fa" 29 | 30 | from_xml = """14097356686054768590064713728""" 31 | decrypt_test = WXBizMsgCrypt(token,encodingAESKey,appid) 32 | ret ,decryp_xml = decrypt_test.DecryptMsg(from_xml, msg_sign, timestamp, nonce) 33 | print(ret ,decryp_xml) 34 | -------------------------------------------------------------------------------- /WXBizMsgCrypt.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python 2 | #-*- encoding:utf-8 -*- 3 | 4 | """ 对公众平台发送给公众账号的消息加解密示例代码. 5 | @copyright: Copyright (c) 1998-2014 Tencent Inc. 6 | 7 | """ 8 | # ------------------------------------------------------------------------ 9 | 10 | import base64 11 | import string 12 | import random 13 | import hashlib 14 | import time 15 | import struct 16 | from Crypto.Cipher import AES 17 | import xml.etree.cElementTree as ET 18 | import socket 19 | import logging 20 | from . import ierror 21 | 22 | 23 | logger = logging.Logger(__name__) 24 | 25 | """ 26 | 关于Crypto.Cipher模块，ImportError: No module named 'Crypto'解决方案 27 | 请到官方网站 https://www.dlitz.net/software/pycrypto/ 下载pycrypto。 28 | 下载后，按照README中的“Installation”小节的提示进行pycrypto安装。 29 | """ 30 | class FormatException(Exception): 31 | pass 32 | 33 | def throw_exception(message, exception_class=FormatException): 34 | """my define raise exception function""" 35 | raise exception_class(message) 36 | 37 | def to_utf8_bytes(str): 38 | return str.encode("utf8") 39 | 40 | def utf8_bytes_to_str(bytes): 41 | return bytes.decode("utf8") 42 | 43 | class SHA1: 44 | """计算公众平台的消息签名接口""" 45 | 46 | def getSHA1(self, token, timestamp, nonce, encrypt): 47 | """用SHA1算法生成安全签名 48 | @param token: 票据 49 | @param timestamp: 时间戳 50 | @param encrypt: 密文 51 | @param nonce: 随机字符串 52 | @return: 安全签名 53 | """ 54 | try: 55 | sortlist = [token, timestamp, nonce, encrypt] 56 | sortlist.sort() 57 | sha = hashlib.sha1() 58 | sha.update(to_utf8_bytes("".join(sortlist))) 59 | return ierror.WXBizMsgCrypt_OK, sha.hexdigest() 60 | except Exception as e: 61 | logger.exception('wechat encryption/decryption error') 62 | return ierror.WXBizMsgCrypt_ComputeSignature_Error, None 63 | 64 | 65 | class XMLParse: 66 | """提供提取消息格式中的密文及生成回复消息格式的接口""" 67 | 68 | # xml消息模板 69 | AES_TEXT_RESPONSE_TEMPLATE = """ 70 | 71 | 72 | %(timestamp)s 73 | 74 | """ 75 | 76 | def extract(self, xmltext): 77 | """提取出xml数据包中的加密消息 78 | @param xmltext: 待提取的xml字符串 79 | @return: 提取出的加密消息字符串 80 | """ 81 | try: 82 | xml_tree = ET.fromstring(xmltext) 83 | encrypt = xml_tree.find("Encrypt") 84 | touser_name = xml_tree.find("ToUserName") 85 | return ierror.WXBizMsgCrypt_OK, encrypt.text, touser_name.text 86 | except Exception as e: 87 | logger.exception('wechat encryption/decryption error') 88 | return ierror.WXBizMsgCrypt_ParseXml_Error,None,None 89 | 90 | def generate(self, encrypt, signature, timestamp, nonce): 91 | """生成xml消息 92 | @param encrypt: 加密后的消息密文 93 | @param signature: 安全签名 94 | @param timestamp: 时间戳 95 | @param nonce: 随机字符串 96 | @return: 生成的xml字符串 97 | """ 98 | resp_dict = { 99 | 'msg_encrypt' : encrypt, 100 | 'msg_signaturet': signature, 101 | 'timestamp' : timestamp, 102 | 'nonce' : nonce, 103 | } 104 | resp_xml = self.AES_TEXT_RESPONSE_TEMPLATE % resp_dict 105 | return resp_xml 106 | 107 | 108 | class PKCS7Encoder(): 109 | """提供基于PKCS7算法的加解密接口""" 110 | 111 | block_size = 32 112 | def encode(self, text_bytes): 113 | """ 对需要加密的明文进行填充补位 114 | @param text_bytes: 需要进行填充补位操作的明文(bytes) 115 | @return: 补齐明文字符(bytes) 116 | """ 117 | text_length = len(text_bytes) 118 | # 计算需要填充的位数 119 | amount_to_pad = self.block_size - (text_length % self.block_size) 120 | if amount_to_pad == 0: 121 | amount_to_pad = self.block_size 122 | # 获得补位所用的字符 123 | pad = bytearray([amount_to_pad]) 124 | return text_bytes + pad * amount_to_pad 125 | 126 | def decode(self, decrypted): 127 | """删除解密后明文的补位字符 128 | @param decrypted: 解密后的明文 129 | @return: 删除补位字符后的明文 130 | """ 131 | pad = ord(decrypted[-1]) 132 | if pad<1 or pad >32: 133 | pad = 0 134 | return decrypted[:-pad] 135 | 136 | 137 | class Prpcrypt(object): 138 | """提供接收和推送给公众平台消息的加解密接口""" 139 | 140 | def __init__(self,key): 141 | #self.key = base64.b64decode(key+"=") 142 | self.key = key 143 | # 设置加解密模式为AES的CBC模式 144 | self.mode = AES.MODE_CBC 145 | 146 | 147 | def encrypt(self,text,appid): 148 | """对明文进行加密 149 | @param text: 需要加密的明文 150 | @return: 加密得到的字符串 151 | """ 152 | # 16位随机字符串添加到明文开头 153 | text_bytes = to_utf8_bytes(text) 154 | text_bytes = to_utf8_bytes(self.get_random_str()) + struct.pack("I", socket.htonl( 155 | len(text_bytes))) + text_bytes + to_utf8_bytes(appid) 156 | # 使用自定义的填充方式对明文进行补位填充 157 | pkcs7 = PKCS7Encoder() 158 | text_bytes = pkcs7.encode(text_bytes) 159 | # 加密 160 | cryptor = AES.new(self.key,self.mode,self.key[:16]) 161 | try: 162 | ciphertext = cryptor.encrypt(text_bytes) 163 | # 使用BASE64对加密后的字符串进行编码 164 | return ierror.WXBizMsgCrypt_OK, utf8_bytes_to_str(base64.b64encode(ciphertext)) 165 | except Exception as e: 166 | logger.exception('wechat encryption/decryption error') 167 | return ierror.WXBizMsgCrypt_EncryptAES_Error,None 168 | 169 | def decrypt(self,text,appid): 170 | """对解密后的明文进行补位删除 171 | @param text: 密文 172 | @return: 删除填充补位后的明文 173 | """ 174 | try: 175 | cryptor = AES.new(self.key,self.mode,self.key[:16]) 176 | # 使用BASE64对密文进行解码，然后AES-CBC解密 177 | plain_text = cryptor.decrypt(base64.b64decode(text)) 178 | except Exception as e: 179 | logger.exception('wechat encryption/decryption error') 180 | return ierror.WXBizMsgCrypt_DecryptAES_Error,None 181 | try: 182 | pad = plain_text[-1] 183 | # 去掉补位字符串 184 | #pkcs7 = PKCS7Encoder() 185 | #plain_text = pkcs7.encode(plain_text) 186 | # 去除16位随机字符串 187 | content = plain_text[16:-pad] 188 | xml_len = socket.ntohl(struct.unpack("I",content[ : 4])[0]) 189 | xml_content = content[4 : xml_len+4] 190 | from_appid = utf8_bytes_to_str(content[xml_len+4:]) 191 | except Exception as e: 192 | logger.exception('wechat encryption/decryption error') 193 | return ierror.WXBizMsgCrypt_IllegalBuffer,None 194 | if from_appid != appid: 195 | return ierror.WXBizMsgCrypt_ValidateAppid_Error,None 196 | return 0,xml_content 197 | 198 | def get_random_str(self): 199 | """ 随机生成16位字符串 200 | @return: 16位字符串 201 | """ 202 | rule = string.ascii_letters + string.digits 203 | str = random.sample(rule, 16) 204 | return "".join(str) 205 | 206 | 207 | 208 | class WXBizMsgCrypt(object): 209 | #构造函数 210 | #@param sToken: 公众平台上，开发者设置的Token 211 | # @param sEncodingAESKey: 公众平台上，开发者设置的EncodingAESKey 212 | # @param sAppId: 企业号的AppId 213 | def __init__(self,sToken,sEncodingAESKey,sAppId): 214 | try: 215 | self.key = base64.b64decode(sEncodingAESKey+"=") 216 | assert len(self.key) == 32 217 | except: 218 | throw_exception("[error]: EncodingAESKey unvalid !", FormatException) 219 | #return ierror.WXBizMsgCrypt_IllegalAesKey) 220 | self.token = sToken 221 | self.appid = sAppId 222 | 223 | def EncryptMsg(self, sReplyMsg, sNonce, timestamp = None): 224 | #将公众号回复用户的消息加密打包 225 | #@param sReplyMsg: 企业号待回复用户的消息，xml格式的字符串 226 | #@param sTimeStamp: 时间戳，可以自己生成，也可以用URL参数的timestamp,如为None则自动用当前时间 227 | #@param sNonce: 随机串，可以自己生成，也可以用URL参数的nonce 228 | #sEncryptMsg: 加密后的可以直接回复用户的密文，包括msg_signature, timestamp, nonce, encrypt的xml格式的字符串, 229 | #return：成功0，sEncryptMsg,失败返回对应的错误码None 230 | pc = Prpcrypt(self.key) 231 | ret,encrypt = pc.encrypt(sReplyMsg, self.appid) 232 | if ret != 0: 233 | return ret,None 234 | if timestamp is None: 235 | timestamp = str(int(time.time())) 236 | # 生成安全签名 237 | sha1 = SHA1() 238 | ret,signature = sha1.getSHA1(self.token, timestamp, sNonce, encrypt) 239 | if ret != 0: 240 | return ret,None 241 | xmlParse = XMLParse() 242 | return ret,xmlParse.generate(encrypt, signature, timestamp, sNonce) 243 | 244 | def DecryptMsg(self, sPostData, sMsgSignature, sTimeStamp, sNonce): 245 | # 检验消息的真实性，并且获取解密后的明文 246 | # @param sMsgSignature: 签名串，对应URL参数的msg_signature 247 | # @param sTimeStamp: 时间戳，对应URL参数的timestamp 248 | # @param sNonce: 随机串，对应URL参数的nonce 249 | # @param sPostData: 密文，对应POST请求的数据 250 | # xml_content: 解密后的原文，当return返回0时有效 251 | # @return: 成功0，失败返回对应的错误码 252 | # 验证安全签名 253 | xmlParse = XMLParse() 254 | ret,encrypt,touser_name = xmlParse.extract(sPostData) 255 | if ret != 0: 256 | return ret, None 257 | sha1 = SHA1() 258 | ret,signature = sha1.getSHA1(self.token, sTimeStamp, sNonce, encrypt) 259 | if ret != 0: 260 | return ret, None 261 | if not signature == sMsgSignature: 262 | return ierror.WXBizMsgCrypt_ValidateSignature_Error, None 263 | pc = Prpcrypt(self.key) 264 | ret,xml_content = pc.decrypt(encrypt,self.appid) 265 | return ret,xml_content 266 | 267 | -------------------------------------------------------------------------------- /freeze.sh: -------------------------------------------------------------------------------- 1 | pip freeze > requirements.txt 2 | cat requirements.txt 3 | -------------------------------------------------------------------------------- /ierror.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python 2 | # -*- coding: utf-8 -*- 3 | ######################################################################### 4 | # Author: jonyqin 5 | # Created Time: Thu 11 Sep 2014 01:53:58 PM CST 6 | # File Name: ierror.py 7 | # Description:定义错误码含义 8 | ######################################################################### 9 | WXBizMsgCrypt_OK = 0 10 | WXBizMsgCrypt_ValidateSignature_Error = -40001 11 | WXBizMsgCrypt_ParseXml_Error = -40002 12 | WXBizMsgCrypt_ComputeSignature_Error = -40003 13 | WXBizMsgCrypt_IllegalAesKey = -40004 14 | WXBizMsgCrypt_ValidateAppid_Error = -40005 15 | WXBizMsgCrypt_EncryptAES_Error = -40006 16 | WXBizMsgCrypt_DecryptAES_Error = -40007 17 | WXBizMsgCrypt_IllegalBuffer = -40008 18 | WXBizMsgCrypt_EncodeBase64_Error = -40009 19 | WXBizMsgCrypt_DecodeBase64_Error = -40010 20 | WXBizMsgCrypt_GenReturnXml_Error = -40011 21 | -------------------------------------------------------------------------------- /requirements.txt: -------------------------------------------------------------------------------- 1 | pycrypto==2.6.1 2 | --------------------------------------------------------------------------------