<?phpclass CrxParserException extends Exception {}/** * Chrome crx 解析器，用于获取扩展、皮肤ID * */class CrxParser {    const MAX_PUBLIC_KEY_SIZE = 65535;    const MAX_SIGNATURE_SIZE  = 65535;    const HEADER_MAGIC_PREFIX = ‘Cr24‘;    const CURRENT_VERSION     = 2;    private $fp = null; //文件指针    private $filename = ‘‘; //文件路径    private $_header = array(); //crx 文件的头信息    public function __construct($filename){        $this->parse($filename);    }    /**     * 获取此应用的ID     * @return string     */    public function getAppid() {        $hash = hash(‘sha256‘,$this->_key);        $hash = substr($hash,0,32);        $length = strlen($hash);        $ascii_0 = ord(‘0‘);        $ascii_9 = ord(‘9‘);        $ascii_a = ord(‘a‘);        $data = ‘‘;        for($i=0;$i<$length;$i++) {            $c = ord($hash[$i]);            if($c >= $ascii_0 && $c <= $ascii_9) {                $d = chr($ascii_a + $c - $ascii_0);            } else if($c >= $ascii_a && $c < $ascii_a + 6) {                $d = chr($ascii_a + $c - $ascii_a + 10);            } else {                $d = ‘a‘;            }            $data .= $d;        }        return $data;    }    /**     * 从crx文件中获取manifest.json文件的配置信息     * @param unknown $zip_file     * @return mixed[]     */    function getConfig($key=null){        $zip_file=tempnam(dirname($this->filename),‘zip‘);        $manifest_arr=array();        if($this->convertToZip($zip_file)){            $zip=zip_open($zip_file);            if(is_resource($zip)){                while($zip_entry=zip_read($zip)){                    $entry_name=zip_entry_name($zip_entry);                    if(preg_match(‘/manifest\.json$/‘, $entry_name)){                        $content=zip_entry_read($zip_entry, zip_entry_filesize($zip_entry));                        $content_j=json_decode($content, true);                        if(!empty($content_j)){                            $manifest_arr=$content_j;                        }                    }                }            }            zip_close($zip);            unlink($zip_file);        }        return is_null($key) ? $manifest_arr : $manifest_arr[$key];    }    /**     * 将文件转换为zip文件     * @param unknown $target_path     */    public function convertToZip($target_path=null){        $offset=16+$this->_header[‘key_size‘]+$this->_header[‘sig_size‘];        $data=$this->getContent($this->filename,$offset);        return !is_null($target_path) ? file_put_contents($target_path, $data) : $data;    }    /**     * 开始解析该 crx 文件     */    private function parse($filename) {        if(strpos($filename, ‘://‘)!==false && !file_exists($filename)) {            throw new CrxParserException("parser init: crx file does not exisit");        }        $this->filename=$filename;        $this->fp = fopen($filename, ‘r‘);        $this->parse_header(); // 解析头部信息        $this->parse_key();        $this->parse_sig();        fclose($this->fp);    }    /**     * 解析头部信息，并设置 $_header 数组     * @throws CrxParserException 解析错误抛出异常     */    private function parse_header() {        $data = fread($this->fp, 16); // HEADER 头信息有16个字节        if($data) {            $data = @unpack(‘C4prefix/Vversion/Vkey_size/Vsig_size‘,$data);        }else{            throw new CrxParserException("header parse: error reading header");        }        // 前四个字节拼合 prefix        $data[‘prefix‘] = chr( $data[‘prefix1‘] ).chr( $data[‘prefix2‘] ).chr( $data[‘prefix3‘] ).chr( $data[‘prefix4‘] );        unset($data[‘prefix1‘],$data[‘prefix2‘],$data[‘prefix3‘],$data[‘prefix4‘]);        if($data[‘prefix‘] != self::HEADER_MAGIC_PREFIX) {            throw new CrxParserException("header parse: illegal prefix");        }        if( $data[‘version‘] != self::CURRENT_VERSION ) {            throw new CrxParserException("header parse: illegal version");        }        if(                empty($data[‘key_size‘]) || $data[‘key_size‘] > self::MAX_PUBLIC_KEY_SIZE ||                empty($data[‘sig_size‘]) || $data[‘sig_size‘] > self::MAX_SIGNATURE_SIZE                ){                    throw new CrxParserException("header parse: illegal public key size or signature size");        }        $this->_header = $data;    }    /**     * 解析key     * @throws CrxParserException     */    private function parse_key() {        $key = fread($this->fp,$this->_header[‘key_size‘]);        if($key) {            $this->_key = $key;        }else{            throw new CrxParserException("key parse: error reading key");        }    }    /**     * 解析sig     * @throws CrxParserException     */    private function parse_sig() {        $sig = fread($this->fp,$this->_header[‘sig_size‘]);        if($sig) {            $this->_sig = $sig;        }else{            throw new CrxParserException("sig parse: error reading sig");        }    }    /**     * 从文件中获取指定位置及大小的内容     * @param unknown $filename     * @param number $offset     * @param unknown $length     * @return string     */    private function getContent($filename,$offset=0,$length=-1){        $stream = fopen($filename, ‘rb‘);        $content = stream_get_contents($stream, $length, $offset);        fclose($stream);        return $content;    }}

<?php$crxParser=new CrxParser(‘abc.crx‘);echo $crxParser->getAppid();var_dump($crxParser->getConfig());//$crxParser->convertToZip(‘abc.zip‘);