PHP进行微信小程序解包操作是怎样

这个解包只能看个大概

1.找到小程序压缩包

1.1、手机root或安装模拟器(我用的是夜神)

1.2、在模拟器上安装微信(用android5系统的模拟器，低版本小程序容易打不开)

1.3、打开登陆微信后，打开小程序

1.4、打开模拟器自带的文件管理器来到目录：/data/data/com.tencent.mm/MicroMsg/{ { 一串32位的16进制字符串文件夹} } /appbrand/pkg/

1.5、里面有很多wxapkg文件，找到最新修改日期的文件比如 -357038350_91.wxapkg，前面打勾选中

1.6、文件管理器回到/mnt/shared/Other目录，粘贴即可，打开安卓模拟器上我的电脑 =〉打开电脑文件夹找到粘贴的文件-357038350_91.wxapkg 夜神教程链接：跳转查看

2.对压缩包解包

详细参考：https://codechina.csdn.net/mirrors/leo9960/wechat-app-unpack?utm_source=csdn_github_accelerator

我用的php类：

使用方法：cmd => cd php文件目录 =〉php wx_unpak.php 357038350_91.wxapkg

我主要是想用其中的一些图片，很多图片都被base64了放到js(app-service.js)和样式(app-wxss.js)文件中了；需要我们匹配组装一下

?php
$str = file_get_contents('_-357038350_97.wxapkg.unpacked/app-service.js');
    
$preg = '/(data:image.*?)\"/';
    
$len = strlen('data:image/png;
    base64,');

if(preg_match_all($preg, $str, $arr)){
    
  foreach($arr[1] as $k =>
 $img){
    
    file_put_contents('./images/'.$k.'.png',base64_decode(substr($img,$len)));
    
    //echo substr($img,$len);
    exit;

  }

}
 else {
    
  echo 'no';

}
    

$str = file_get_contents('_-357038350_97.wxapkg.unpacked/app-wxss.js');
    
$preg = '/\((data:image.*?)\)/';
    
$len = strlen('data:image/png;
    base64,');

if(preg_match_all($preg, $str, $arr)){
    
  foreach($arr[1] as $k =>
 $img){
    
    file_put_contents('./images/a2_'.$k.'.png',base64_decode(substr($img,$len)));
    
    //echo substr($img,$len);
    exit;

  }

}
 else {
    
  echo 'no';

}

wx_unpak.php

?php
/**
源文件目录
  /data/data/com.tencent.mm/MicroMsg/{
{
一串32位的16进制字符串文件夹}
}
    /appbrand/pkg/
  /data/data/com.eg.android.AlipayGphone, 在files/nebulaInstallApps/目录下存储了所有加载过的小程序
 * [php] /path/to/unpack-wxapkg.php xxx.wxapkg>

 * php unpak.php _1123949441_351.wxapkg
 */

function unpack_wxapkg($file, $targetDir)
{

  if (!is_dir($targetDir)){
    
    mkdir($targetDir);

  }
    

  echo "Reading file.\n";
    
  $file = file_get_contents($file);
    
  $ptr = 18;
    

  $headerStruct = new StructDef([
    'mask1' =>
     'ushort',
    'info1' =>
     'ulong',
    'indexInfoLength' =>
     'ulong',
    'bodyInfoLength' =>
     'ushort',
    'mask2' =>
     'ushort',
    'fileCount' =>
     'ulong',
  ]);
    

  echo "Parsing file header...\n";
    

  $header = $headerStruct->
    unpack($file);
    
//  print_r(['header' =>
     $header]);
    

  $unpackULong = function () use (&
    $file, &
$ptr) {
    
    $ret = unpack_ulong(substr($file, $ptr, 4));
    
    $ptr += 4;
    
    return $ret;

  }
    ;
    

  $unpackUShort = function () use (&
    $file, &
$ptr) {
    
    $ret = unpack_ushort(substr($file, $ptr, 2));
    
    $ptr += 2;
    
    return $ret;

  }
    ;
    


  $unpackStr = function ($len) use (&
    $file, &
$ptr) {
    
    $ret = substr($file, $ptr, $len);
    
    $ptr += $len;
    
    return $ret;

  }
    ;
    


  $fileCount = $header['fileCount'];
    

  echo "Got $fileCount files.\n";
    

  $unpackedFiles = [];
    

  for ($i = 0;
     $i  $fileCount;
 $i++) {
    
    $nameLength = $unpackULong();
    
    $f = [
      'nameLength' =>
     $nameLength,
      'name' =>
     $unpackStr($nameLength),
      'offset' =>
     $unpackULong(),
      'size' =>
     $unpackULong(),
    ];


    echo "Unpacking file {
$f['name']}
 ({
$f['size']}
    bytes)...\n";
    

    $f['content'] = substr($file, $f['offset'], $f['size']);
    
    $unpackedFiles[] = $f;
    

    $destFile = $targetDir . $f['name'];
    
    $destDir = dirname($destFile);

    if (!is_dir($destDir)){
    
      mkdir($destDir, 0777, true);

    }
    

    file_put_contents($targetDir . $f['name'], $f['content']);

  }
    


//  print_r(['unpackedFiles' =>
     $unpackedFiles]);
    



  echo "All done.\n";

}


function unpack_ulong($str)
{
    
  $x = unpack('N', $str);
    
  return $x[1];

}


function unpack_ushort($str)
{
    
  $x = unpack('n', $str);
    
  return $x[1];

}


class StructDef
{
    
  protected $def;
    
  protected $unpackFormat;


  public function __construct($def)
  {
    
    $this->
    def = $def;
    
    $this->
    unpackFormat = self::convertStructDefToUnpackFormat($def);

  }


  public function unpack($data)
  {
    
    return unpack($this->
    unpackFormat, $data);

  }


  protected static function convertStructDefToUnpackFormat($def)
  {
    
    $defTypeToUnpackType = [
      'byte' =>
     'C',
      'uchar' =>
     'C',
      'u8' =>
     'C',
      'ushort' =>
     'n',
      'u16' =>
     'n',
      'ulong' =>
     'N',
      'u32' =>
     'N',
    ];
    

    $ret = [];
    
    foreach ($def as $key =>
 $type) {
    
      $ret[] = $defTypeToUnpackType[$type] . $key;

    }
    

    return implode('/', $ret);

  }

}
    

$packageFile = $argv[1];


//支持目录下文件批量解压
 if (is_dir($packageFile)){
    
  $handle = opendir($packageFile);

  if($handle){

    while(($fl = readdir($handle)) !== false){
    
      $temp = $packageFile.DIRECTORY_SEPARATOR.$fl;
    
      //如果不加 $fl!='.' &
    &
 $fl != '..' 则会造成把$dir的父级目录也读取出来
      if(is_file($temp)){
    
        if($fl!='.' &
    &
 $fl != '..'){
    
          $targetDir = $temp . '.unpacked';
    
          unpack_wxapkg($temp, $targetDir);

        }

      }

    }

  }
 
}
else if (is_file($packageFile)){
    
  $targetDir = $packageFile . '.unpacked';
    
  unpack_wxapkg($packageFile, $targetDir);

}
else{

  echo HELP
Usage:
  [php] {
$argv[0]}
     xxx.wxapkg>
    
  - Unpack the `xxx.wxapkg` to `xxx.wxapkg.unpacked` directory.
HELP;
    

  exit(1);

}
    

exit(0);
    

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