php微信小程序解包

2023-10-13 13:47:58

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);

php微信小程序解包

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