PHP项目文件内容的加密和解密方法

<?php /* * @Auther:luren * @Date:2024.3.6 * @Desc: PHP项目文件进行加密处理 * */ class Encryption{ private $c='';//存储密文 private $s='',$q1,$q2,$q3,$q4,$q5,$q6;//存储生成的加密后的文件内容 private $file='';//读取文件的路径 private $source='',$target=''; //构造函数，实例化时调用初始化全局变量； public function __construct(){ //初始化全局变量 $this->initialVar(); } /* *@input $property_name,$value *@output */ public function __set($property_name,$value){ if(isset($this->$property_name)){ $this->$property_name = $value; }else{ throw new Exception("property does not exist"); } } /* *@input $property_name *@output */ public function __get($property_name){ if(isset($this->$property_name)){ return $this->$property_name; }else{ return NULL; } } /* *@input $length *@output */ private function RandAbc($length=""){//随机排序取回 $str="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; return str_shuffle($str); } //对明文内容进行加密处理 private function ciphertext($filename){ //$filename='index.php'; $T_k1=$this->RandAbc(); $T_k2=$this->RandAbc(); $vstr=file_get_contents($filename); $v1=base64_encode($vstr); $c=strtr($v1,$T_k1,$T_k2); $this->c=$T_k1.$T_k2.$c; return $this; } //初始化变量 private function initialVar(){ $this->q1="O00O0O";//base64_decode $this->q2="O0O000";//$c(原文经过strtr置换后的密文，由 目标字符+替换字符+base64_encode(‘原文内容’)构成) $this->q3="O0OO00";//strtr $this->q4="OO0O00";//substr $this->q5="OO0000";//52 $this->q6="O00OO0";//urldecode解析过的字符串（n1zb/ma5\vt0i28-pxuqy*6%6Crkdg9_ehcswo4+f37j } //生成加密后的模板(复杂版本); private function model(){ //$c = $this->c; //$this->initialVar(); $this->s='<?php $'.$this->q6.'=urldecode("%6E1%7A%62%2F%6D%615%5C%76%740%6928%2D%70%78%75%71%79%2A6%6C%72%6B%64%679%5F%65%68%63%73%77%6F4%2B%6637%6A");$'. $this->q1.'=$'.$this->q6.'{3}.$'.$this->q6.'{6}.$'.$this->q6.'{33}.$'.$this->q6.'{30};$'.$this->q3.'=$'.$this->q6.'{33}.$'.$this->q6.'{10}.$' .$this->q6.'{24}.$'.$this->q6.'{10}.$'.$this->q6.'{24};$'.$this->q4.'=$'.$this->q3.'{0}.$'.$this->q6.'{18}.$'.$this->q6.'{3}.$'.$this->q3.'{0} .$'.$this->q3.'{1}.$'.$this->q6.'{24};$'.$this->q5.'=$'.$this->q6.'{7}.$'.$this->q6.'{13};$'.$this->q1.'.=$'.$this->q6.'{22}.$'.$this->q6.'{36} .$'.$this->q6.'{29}.$'.$this->q6.'{26}.$'.$this->q6.'{30}.$'.$this->q6.'{32}.$'.$this->q6.'{35}.$'.$this->q6.'{26}.$'.$this->q6.'{30}; eval($'.$this->q1.'("'.base64_encode('$'.$this->q2.'="'.$this->c.'"; eval(\'?>\'.$'.$this->q1.'($'.$this->q3.'($'.$this->q4.'($'.$this->q2.',$'.$this->q5.'*2),$'.$this->q4.'($'.$this->q2.',$'.$this->q5.',$'.$this->q5.'), $'.$this->q4.'($'.$this->q2.',0,$'.$this->q5.'))));').'"));?>'; return $this; } //创建加密文件 private function build($target){ //$this->encodes("./index.php"); //$this->model(); $fpp1 = fopen($target,'w'); fwrite($fpp1,$this->s) or die('写入是失败！'); fclose($fpp1); return $this; } //加密处理 连贯操作 public function encode($file,$target){ //连贯操作其实就是利用函数处理完后返回自身 $this->ciphertext($file)->model()->build($target); echo "encode:".$target."[ok] \n"; } //解密 public function decode($file,$target=''){ //读取要解密的文件 //待读取的文件 echo "decode:".$target."[start] \n"; $fpp1 = file_get_contents($file); $this->decodeMode($fpp1)->build($target); echo "decode:".$target."[ok] \n"; } //解密模板，得到解密后的文本 private function decodeMode($fpp1){ //判断是否是加密的文件 if (strpos($fpp1, $this->q1) === false) { $this->s = $fpp1; } else{ //以eval为标志 截取为数组，前半部分为密文中的替换掉的函数名，后半部分为密文 $m = explode('eval',$fpp1); //对系统函数的替换部分进行执行，得到系统变量 $varStr = substr($m[0],strpos($m[0],'$')); //执行后，后续就可以使用替换后的系统函数名 eval($varStr); //判断是否有密文 if(!isset($m[1])){ return $this; } //对密文进行截取 {$this->q4} substr $star = strripos($m[1],'('); $end = strpos($m[1],')'); $str = ${$this->q4}($m[1],$star,$end); //对密文解密 {$this->q1} base64_decode $str = ${$this->q1}($str); //截取出解密后的 核心密文 $evallen = strpos($str,'eval'); $str = substr($str,0,$evallen); //执行核心密文 使系统变量被赋予值 $O0O000 eval($str); //并不能将如下段封装，因为 ${$this->qn} 并不能在全文中起作用 $this->s = ${$this->q1}( ${$this->q3}( ${$this->q4}( ${$this->q2},${$this->q5}*2 ), ${$this->q4}( ${$this->q2},${$this->q5},${$this->q5} ), ${$this->q4}( ${$this->q2},0,${$this->q5} ) ) ); } return $this; } //递归读取并创建目标目录结构 private function targetDir($target){ if(!empty($target) ) { if(!file_exists($target)){ mkdir($target,0777,true); }else{ chmod($target,0777); } } } //递归解密 对指定文件夹下的php文件解密 public function decodeDir($source,$target=""){ if(is_dir($source)){ $this->targetDir($target); $dir = opendir($source); while(false!=$file=readdir($dir)) { //列出所有文件并去掉'.'和'..' 此处用的实例为thinkphp框架，所以默认排除里Thinkphp目录，用户可以按照自己的需求设置 if($file!='.' && $file!='..' && $file !='ThinkPHP') { $path = $target.DIRECTORY_SEPARATOR.$file; $sourcePath = $source.DIRECTORY_SEPARATOR.$file; $this->decodeDir($sourcePath,$path); } } }else if(is_file($source)){ $extension=substr($source,strrpos($source,'.')+1); if(strtolower($extension)=='php'){