php实现对js代码的混淆加密效果代码-php代码-BFW代码库

代码语言：php
所属分类：其他
代码描述：php实现对js代码的混淆加密效果代码，提供js代码。php运行后产生混淆后的js代码
下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开
<?php
/* 9 April 2008. version 1.1
 * 
 * This is the php version of the Dean Edwards JavaScript's Packer,
 * Based on :
 * 
 * ParseMaster, version 1.0.2 (2005-08-19) Copyright 2005, Dean Edwards
 * a multi-pattern parser.
 * KNOWN BUG: erroneous behavior when using escapeChar with a replacement
 * value that is a function
 * 
 * packer, version 2.0.2 (2005-08-19) Copyright 2004-2005, Dean Edwards
 * 
 * License: http://creativecommons.org/licenses/LGPL/2.1/
 * 
 * Ported to PHP by Nicolas Martin.
 * 
 * ----------------------------------------------------------------------
 * changelog:
 * 1.1 : correct a bug, '\0' packed then unpacked becomes '\'.
 * ----------------------------------------------------------------------
 * 
 * examples of usage :
 * $myPacker = new Packer($script, 62, true, false);
 * $packed = $myPacker->pack();
 * 
 * or
 * 
 * $myPacker = new Packer($script, 'Normal', true, false);
 * $packed = $myPacker->pack();
 * 
 * or (default values)
 * 
 * $myPacker = new Packer($script);
 * $packed = $myPacker->pack();
 * 
 * 
 * params of the constructor :
 * $script:       the JavaScript to pack, string.
 * $encoding:     level of encoding, int or string :
 *                0,10,62,95 or 'None', 'Numeric', 'Normal', 'High ASCII'.
 *                default: 62.
 * $fastDecode:   include the fast decoder in the packed result, boolean.
 *                default : true.
 * $specialChars: if you are flagged your private and local variables
 *                in the script, boolean.
 *                default: false.
 * 
 * The pack() method return the compressed JavasScript, as a string.
 * 
 * see http://dean.edwards.name/packer/usage/ for more information.
 * 
 * Notes :
 * # need PHP 5 . Tested with PHP 5.1.2, 5.1.3, 5.1.4, 5.2.3
 * 
 * # The packed result may be different than with the Dean Edwards
 *   version, but with the same length. The reason is that the PHP
 *   function usort to sort array don't necessarily preserve the
 *   original order of two equal member. The Javascript sort function
 *   in fact preserve this order (but that's not require by the
 *   ECMAScript standard). So the encoded keywords order can be
 *   different in the two results.
 * 
 * # Be careful with the 'High ASCII' Level encoding if you use
 *   UTF-8 in your files... 
 */
 
namespace Tholu\Packer;


class Packer {
	// constants
	const IGNORE = '$1';

	// validate parameters
	private $_script = '';
	private $_encoding = 62;
	private $_fastDecode = true;
	private $_specialChars = false;
	private $_removeSemicolons = true;
	
	private $LITERAL_ENCODING = array(
		'None' => 0,
		'Numeric' => 10,
		'Normal' => 62,
		'High ASCII' => 95
	);
	
	public function __construct($_script, $_encoding = 62, $_fastDecode = true, $_specialChars = false, $_removeSemicolons = true)
	{
		$this->_script = $_script . "\n";
		if (array_key_exists($_encoding, $this->LITERAL_ENCODING))
			$_encoding = $this->LITERAL_ENCODING[$_encoding];
		$this->_encoding = min((int)$_encoding, 95);
		$this->_fastDecode = $_fastDecode;	
		$this->_specialChars = $_specialChars;
		$this->_removeSemicolons = $_removeSemicolons;
	}
	
	public function pack() {
		$this->_addParser('_basicCompression');
		if ($this->_specialChars)
			$this->_addParser('_encodeSpecialChars');
		if ($this->_encoding)
			$this->_addParser('_encodeKeywords');
		
		// go!
		return $this->_pack($this->_script);
	}
	
	// apply all parsing routines
	private function _pack($script) {
		for ($i = 0; isset($this->_parsers[$i]); $i++) {
			$script = call_user_func(array(&$this,$this->_parsers[$i]), $script);
		}
		return $script;
	}
	
	// keep a list of parsing functions, they'll be executed all at once
	private $_parsers = array();
	private function _addParser($parser) {
		$this->_parsers[] = $parser;
	}
	
	// zero encoding - just removal of white space and comments
	private function _basicCompression($script) {
		$parser = new ParseMaster();
		// make safe
		$parser->escapeChar = '\\';
		// protect strings
		$parser->add('/\'[^\'\\n\\r]*\'/', self::IGNORE);
		$parser->add('/"[^"\\n\\r]*"/', self::IGNORE);
		// remove comments
		$parser->add('/\\/\\/[^\\n\\r]*[\\n\\r]/', ' ');
		$parser->add('/\\/\\*[^*]*\\*+([^\\/][^*]*\\*+)*\\//', ' ');
		// protect regular expressions
		$parser->add('/\\s+(\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?)/', '$2'); // IGNORE
		$parser->add('/[^\\w\\x24\\/\'"*)\\?:]\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?/', self::IGNORE);
		// remove: ;;; doSomething();
		if ($this->_specialChars) $parser->add('/;;;[^\\n\\r]+[\\n\\r]/');
		// remove redundant semi-colons
		if ($this->_removeSemicolons) {
			$parser->add('/\\(;;\\)/', self::IGNORE); // protect for (;;) loops
			$parser->add('/;+\\s*([};])/', '$2');
		}
		// apply the above
		$script = $parser->exec($script);

		// remove white-space
		$parser->add('/(\\b|\\x24)\\s+(\\b|\\x24)/', '$2 $3');
		$parser->add('/([+\\-])\\s+([+\\-])/', '$2 $3');
		$parser->add('/\\s+/', '');
		// done
		return $parser->exec($script);
	}
	
	private function _encodeSpecialChars($script) {
		$parser = new ParseMaster();
		// replace: $name -> n, $$name -> na
		$parser->add('/((\\x24+)([a-zA-Z$_]+))(\\d*)/',
					 array('fn' => '_replace_name')
		);
		// replace: _name -> _0, double-underscore (__name) is ignored
		$regexp = '/\\b_[A-Za-z\\d]\\w*/';
		// build the word list
		$keywords = $this->_analyze($script, $regexp, '_encodePrivate');
		// quick ref
		$encoded = $keywords['encoded'];
		
		$parser->add($regexp,
			array(
				'fn' => '_replace_encoded',
				'data' => $encoded
			)
		);
		return $parser->exec($script);
	}
	
	private function _encodeKeywords($script) {
		// escape high-ascii values already in the script (i.e. in strings)
		if ($this->_encoding > 62)
			$script = $this->_escape95($script);
		// create the parser
		$parser = new ParseMaster();
		$encode = $this->_getEncoder($this->_encoding);
		// for high-ascii, don't encode single character low-ascii
		$regexp = ($this->_encoding > 62) ? '/\\w\\w+/' : '/\\w+/';
		// build the word list
		$keywords = $this->_analyze($script, $regexp, $encode);
		$encoded = $keywords['encoded'];
		
		// encode
		$parser->add($regexp,
			array(
				'fn' => '_replace_encoded',
				'data' => $encoded
			)
		);
		if (empty($script)) return $script;
		else {
			//$res = $parser->exec($script);
			//$res = $this->_bootStrap($res, $keywords);
			//return $res;
			return $this->_bootStrap($parser->exec($script), $keywords);
		}
	}
	
	private function _analyze($script, $regexp, $encode) {
		// analyse
		// retreive all words in the script
		$all = array();
		preg_match_all($regexp, $script, $all);
		$_sorted = array(); // list of words sorted by frequency
		$_encoded = array(); // dictionary of word->encoding
		$_protected = array(); // instances of "protected" words
		$all = $all[0]; // simulate the javascript comportement of global match
		if (!empty($all)) {
			$unsorted = array(); // same list, not sorted
			$protected = array(); // "protected" words (dictionary of word->"word")
			$value = array(); // dictionary of charCode->encoding (eg. 256->ff)
			$this->_count = array(); // word->count
			$i = count($all); $j = 0; //$word = null;
			// count the occurrences - used for sorting later
			do {
				--$i;
				$word = '$' . $all[$i];
				if (!isset($this->_count[$word])) {
					$this->_count[$word] = 0;
					$unsorted[$j] = $word;
					// make a dictionary of all of the protected words in this script
					//  these are words that might be mistaken for encoding
					//if (is_string($encode) && method_exists($this, $encode))
					$values[$j] = call_user_func(array(&$this, $encode), $j);
					$protected['$' . $values[$j]] = $j++;
				}
				// increment the word counter
				$this->_count[$word]++;
			} while ($i > 0);
			// prepare to sort the word list, first we must protect
			//  words that are also used as codes. we assign them a code
			//  equivalent to the word itself.
			// e.g. if "do" falls within our encoding range
			//      then we store keywords["do"] = "do";
			// this avoids problems when decoding
			$i = count($unsorted);
			do {
				$word = $unsorted[--$i];
				if (isset($protected[$word]) /*!= null*/) {
					$_sorted[$protected[$word]] = substr($word, 1);
					$_protected[$protected[$word]] = true;
					$this->_count[$word] = 0;
				}
			} while ($i);
			
			// sort the words by frequency
			// Note: the javascript and php version of sort can be different :
			// in php manual, usort :
			// " If two members compare as equal,
			// their order in the sorted array is undefined."
			// so the final packed script is different of the Dean's javascript version
			// but equivalent.
			// the ECMAscript standard does not guarantee this behaviour,
			// and thus not all browsers (e.g. Mozilla versions dating back to at
			// least 2003) respect this. 
			usort($unsorted, array(&$this, '_sortWords'));
			$j = 0;
			// because there are "protected" words in the list
			//  we must add the sorted words around them
			do {
				if (!isset($_sorted[$i]))
					$_sorted[$i] = substr($unsorted[$j++], 1);
				$_encoded[$_sorted[$i]] = $values[$i];
			} while (++$i < count($unsorted));
		}
		return array(
			'sorted'  => $_sorted,
			'encoded' => $_encoded,
			'protected' => $_protected);
	}
	
	private $_count = array();
	private function _sortWords($match1, $match2) {
		return $this->_count[$match2] - $this->_count[$match1];
	}
	
	// build the boot function used for loading and decoding
	private function _bootStrap($packed, $keywords) {
		$ENCODE = $this->_safeRegExp('$encode\\($count\\)');

		// $packed: the packed script
		$packed = "'" . $this->_escape($packed) . "'";

		// $ascii: base for encoding
		$ascii = min(count($keywords['sorted']), $this->_encoding);
		if ($ascii == 0) $ascii = 1;

		// $count: number of words contained in the script
		$count = count($keywords['sorted']);

		// $keywords: list of words contained in the script
		foreach ($keywords['protected'] as $i=>$value) {
			$keywords['sorted'][$i] = '';
		}
		// convert from a string to an array
		ksort($keywords['sorted']);
		$keywords = "'" . implode('|',$keywords['sorted']) . "'.split('|')";

		$encode = ($this->_encoding > 62) ? '_encode95' : $this->_getEncoder($ascii);
		$encode = $this->_getJSFunction($encode);
		$encode = preg_replace('/_encoding/','$ascii', $encode);
		$encode = preg_replace('/arguments\\.callee/','$encode', $encode);
		$inline = '\\$count' . ($ascii > 10 ? '.toString(\\$ascii)' : '');

		// $decode: code snippet to speed up decoding
		if ($this->_fastDecode) {
			// create the decoder
			$decode = $this->_getJSFunction('_decodeBody');
			if ($this->_encoding > 62)
				$decode = preg_replace('/\\\\w/', '[\\xa1-\\xff]', $decode);
			// perform the encoding inline for lower ascii values
			elseif ($ascii < 36)
				$decode = preg_replace($ENCODE, $inline, $decode);
			// special case: when $count==0 there are no keywords. I want to keep
			//  the basic shape of the unpacking funcion so i'll frig the code...
			if ($count == 0)
				$decode = preg_replace($this->_safeRegExp('($count)\\s*=\\s*1'), '$1=0', $decode, 1);
		}

		// boot function
		$unpack = $this->_getJSFunction('_unpack');
		if ($this->_fastDecode) {
			// insert the decoder
			$this->buffer = $decode;
			$unpack = preg_replace_callback('/\\{/', array(&$this, '_insertFastDecode'), $unpack, 1);
		}
		$unpack = preg_replace('/"/', "'", $unpack);
		if ($this->_encoding > 62) { // high-ascii
			// get rid of the word-boundaries for regexp matches
			$unpack = preg_replace('/\'\\\\\\\\b\'\s*\\+|\\+\s*\'\\\\\\\\b\'/', '', $unpack);
		}
		if ($ascii > 36 || $this->_encoding > 62 || $this->_fastDecode) {
			// insert the encode function
			$this->buffer = $encode;
			$unpack = preg_replace_callback('/\\{/', array(&$this, '_insertFastEncode'), $unpack, 1);
		} else {
			// perform the encoding inline
			$unpack = preg_replace($ENCODE, $inline, $unpack);
		}
		// pack the boot function too
		.........完整代码请登录后点击上方下载按钮下载查看