微信小程序源码提取

流程

1. 安卓手机安装微信，并下载对应小程序打开
2. 进入微信文件目录，提取.wxapkg 文件
3. 使用wxapkg工具解包

安装adb及链接mumu模拟器

brew cask install android-platform-tools

【win版】
adb connect 127.0.0.1:7555
adb shell

【mac版】

adb kill-server && adb server && adb shell

提取

$adb connect 127.0.0.1:5555
$ adb devices
List of devices attached
127.0.0.1:5555  offline
emulator-5554   device

$ adb -s emulator-5554 shell
root@x86:/ # cd /data/data/com.tencent.mm/MicroMsg/f53075a62982bc3092e95c9fe1e1531a/appbrand/pkg
FaiWongdeMacBook-Pro:~ faiwong$ adb -s emulator-5554 pull /data/data/com.tencent.mm/MicroMsg/f53075a62982bc3092e95c9fe1e1531a/appbrand/pkg

f53075a62982bc3092e95c9fe1e1531a为微信为每个用户创建的独立文件夹， 进入MicroMsg逐个寻找。

解包

这里是python3 运行环境

# unwxapkg.py
# coding: utf-8
# py2 origin author lrdcq
# usage python3 unwxapkg.py filename

__author__ = 'Integ: https://github.com./integ'

import sys, os
import struct

class WxapkgFile(object):
    nameLen = 0
    name = ""
    offset = 0
    size = 0

if len(sys.argv) < 2:
    print('usage: unwxapkg.py filename [output_dir]')
    exit()

with open(sys.argv[1], "rb") as f:
    root = os.path.dirname(os.path.realpath(f.name))
    name = os.path.basename(f.name) + '_dir'
    if len(sys.argv) > 2:
        name = sys.argv[2]

    #read header
    firstMark = struct.unpack('B', f.read(1))[0]
    print('first header mark = {}'.format(firstMark))

    info1 = struct.unpack('>L', f.read(4))[0]
    print('info1 = {}'.format(info1))

    indexInfoLength = struct.unpack('>L', f.read(4))[0]
    print('indexInfoLength = {}'.format(indexInfoLength))

    bodyInfoLength = struct.unpack('>L', f.read(4))[0]
    print('bodyInfoLength = {}'.format(bodyInfoLength))

    lastMark = struct.unpack('B', f.read(1))[0]
    print('last header mark = {}'.format(lastMark))

    if firstMark != 0xBE or lastMark != 0xED:
        print('its not a wxapkg file!!!!!')
        f.close()
        exit()

    fileCount = struct.unpack('>L', f.read(4))[0]
    print('fileCount = {}'.format(fileCount))

    #read index
    fileList = []
    for i in range(fileCount):
        data = WxapkgFile()
        data.nameLen = struct.unpack('>L', f.read(4))[0]
        data.name = f.read(data.nameLen)
        data.offset = struct.unpack('>L', f.read(4))[0]
        data.size = struct.unpack('>L', f.read(4))[0]
        print('readFile = {} at Offset = {}'.format(str(data.name, encoding = "utf-8"), data.offset))

        fileList.append(data)

    #save files
    for d in fileList:
        d.name = '/' + name + str(d.name, encoding = "utf-8")
        path = root + os.path.dirname(d.name)

        if not os.path.exists(path):
            os.makedirs(path)

        w = open(root + d.name, 'wb')
        f.seek(d.offset)
        w.write(f.read(d.size))
        w.close()

        print('writeFile = {}{}'.format(root, d.name))

    f.close()

usage: python unwxapkg.py ./_111122233.wxapkg