php微信小程序解包过程实例详解

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，引号有什么作用打开小程序

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：/d/file/titlepic/login =>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ba64了放到js(app-rvice.js)和样式(app-wxss.js)文件中了；需要我们匹配组装一下

<?php$str = file_get_contents('_-357038350_97.wxapkg.unpacked/app-rvice.js');$preg = '/(data:image.*?)\"/';$len = strlen('data:image/png;ba64,');if(preg_match_all($preg, $str, $arr)){  foreach($arr[1] as $k => $img){    file_put_contents('./images/'.$k.'.png',ba64_decode(substr($img,$len)));    //echo substr($img,$len);exit;  }} el {  echo 'no';}$str = file_get_contents('_-357038350_97.wxapkg.unpacked/app-wxss.js');$preg = '/\((data:image.*?)\)/';$len = strlen('data:image/png;ba64,');if(preg_match_all($preg, $str, $arr)){  foreach($arr[1] as $k => $img){    file_put_contents('./images/a2_'.$k.'.png',ba64_decode(substr($img,$len)));    //echo substr($img,$len);exit;  }} el {  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'婚假申请书范文,    'mask2' => 'ushort',    'filecount' => 'ulong',  ]);  echo "parsing file header...\n";  $header = $headerstruct->unpack($file);//  print_r(['header' => $header]);  $unpackulong = function () u (&$file, &$ptr) {    $ret = unpack_ulong(substr($file, $ptr, 4));    $ptr += 4;    return $ret;  };  $unpackushort = function () u (&$file, &$ptr) {    $ret = unpack_ushort(substr($file, $ptr, 2));    $ptr += 2;    return $ret;  };  $unpackstr = function ($len) u (&$file, &$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),      'offt' => $unpackulong(),      'size' => $unpackulong(),    ];    echo "unpacking fi红枫林le {$f['name']} ({$f['size']}bytes)...\n";    $f['content'] = substr($file, $f['offt'], $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' => $unpackedfiles]);  echo 河北会考"all done.\n";}function unpack_ulon我要成功g($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;    $this->unpackformat = lf::convertstructdeftounpackformat($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)) !== fal){      $temp = $packagefile.directory_parator.$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, $targetdir);        }      }    }  } }el if (is_file($packagefile)){  $targetdir = $packagefile . '.unpacked';  unpack_wxapkg($packagefile, $targetdir);}el{  echo <<<helpusage:  [php] {$argv[0]} <xxx.wxapkg>  - unpack the `xxx.wxapkg` to `xxx.wxapkg.unpacked` directory.help;  exit(1);}exit(0);

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