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HomeBackend DevelopmentPHP TutorialPHP implements salted image encryption

PHP implements salted image encryption

Jan 02, 2018 pm 01:42 PM
phpencryptionpicture

PHP加密解密算是老话题,今天给大家分享一篇关于php实现图片加密解密,支持加盐的文章,有需要的朋友们可以参考借鉴。希望对大家有所帮助。

一个简单的图片加解密函数,使用client跑,不要使用浏览器跑

话不多说,直接上代码


<?php

$notice = <<<A
  为了稳定性,必须在客户端跑
  格式 :php path=D:/xxx/uuu type=en is_copy=1 salt=xxx
  参数使用空格分开
  path    -- 路径 必须写
  type    -- en加密, de为解密 必须写
  is_copy    -- 1为复制,0为转移,         不写默认为转移
  salt    -- 加密钥匙 加密用什么,解密就用什么  不写默认为salt
A;

//如果不是客户端
if(PHP_SAPI != &#39;cli&#39;) {echo $notice;die;}

//获取参数
$arr = parse_parameter($argv);

//如果路径没设置
if(!isset($arr[&#39;path&#39;]) || !isset($arr[&#39;type&#39;]))   {echo $notice;die;}
//如果is_dir没设置
if(!isset($arr[&#39;is_copy&#39;]))             {$arr[&#39;is_copy&#39;] = &#39;&#39;;}
//如果salt没设置
if(!isset($arr[&#39;salt&#39;]))               {$arr[&#39;salt&#39;] = &#39;&#39;;}

//type为en就加密
if($arr[&#39;type&#39;] == "en") img_enconde($arr[&#39;path&#39;], $arr[&#39;is_copy&#39;], $arr[&#39;salt&#39;]);
//type为de就解密
if($arr[&#39;type&#39;] == "de") img_deconde($arr[&#39;path&#39;], $arr[&#39;is_copy&#39;], $arr[&#39;salt&#39;]);


function parse_parameter($argv)
{
  $arr = array();
  //获取参数
  for($len=count($argv)-1; $len--; )
  {
    list($key, $val) = explode(&#39;=&#39;, $argv[$len]);
    $arr[$key] = $val;
  }
  return $arr;
}


//图片加密函数
//路径文件夹
//是否为复制(默认不复制)
//盐(默认为salt)
function img_enconde($path, $is_copy = 0, $salt = &#39;salt&#39;)
{
  $time1 = microtime(1);
  $handle = opendir($path);
  if(!$salt) $salt = &#39;salt&#39;;
  if($handle)
  {
    echo "路径:" . $path . "\r\n\r\n";
    //在指定文件夹下创建临时文件夹
    $temp_dir = $path . &#39;\\&#39; . &#39;temp&#39;;
    @mkdir($temp_dir, 0777, 1);

    while ($file = readdir($handle))
    {
      $time2 = microtime(1);
      //构造当前文件绝对地址
      $dir_path = $path . &#39;\\&#39; . $file;
      //获取文件后缀
      $suffix = strrchr($file, &#39;.&#39;);
      //图片后缀
      $fix = array(&#39;.jpg&#39;, &#39;.gif&#39;, &#39;.bmp&#39;, &#39;.png&#39;, &#39;.jpeg&#39;, &#39;.JPG&#39;, &#39;.GIF&#39;, &#39;.BMP&#39;, &#39;.PNG&#39;, &#39;JPEG&#39;);

      if(is_file($dir_path) && in_array($suffix, $fix))
      {
        //打开当前文件
        $fh = fopen($dir_path, &#39;r&#39;);

        //打开文件为流
        $stream = fread($fh, filesize($dir_path));
        //输出
        file_put_contents($temp_dir . &#39;\\&#39; . uniqid(&#39;&#39;,1), $file . &#39;!&#39; . $salt . &#39;@&#39; . $stream);
        //关闭句柄
        fclose($fh);

        //是否为复制
        //1为复制,0为删除(默认)
        if(!$is_copy)
        {
          echo "加密并删除 : " . $dir_path . "\r\n";
          @unlink($dir_path);
        }
        else
        {
          echo "加密 : " . $dir_path . "\r\n";
        }
        $time3 = microtime(1);
        echo "此图用时 ", ($time3 - $time2), " S\r\n", "已经用时 ", ($time3 - $time1), " S\r\n\r\n";
      }
    }

    echo "加密完成\r\n";
  }
  else
  {
    echo "path invalid ";
    return false;
  }
}

//图片解密函数
//路径文件夹
//是否为复制(默认不复制)
//盐(默认为salt)加密写什么,这里就写什么
function img_deconde($path, $is_copy = 0, $salt = &#39;&#39;)
{
  $time1 = microtime(1);
  $handle = opendir($path);
  if($handle)
  {
    echo "路径:" . $path . "\r\n\r\n";
    if(!$salt) $salt = &#39;salt&#39;;

    //在指定文件夹下创建临时文件夹
    $temp_dir = $path . &#39;\\&#39; . &#39;temp&#39;;
    @mkdir($temp_dir, 0777, 1);

    //核心正则
    $reg = "#^(.+?[jpgifbmne]{3,4})!(" . $salt . ")@#im";
    $res = array();

    $count = 0;
    while ($file = readdir($handle))
    {
      $time2 = microtime(1);
      //构造当前文件绝对地址
      $file_path = $path . &#39;\\&#39; . $file;

      if(is_file($file_path))
      {
        //文件句柄
        $hf = fopen($file_path, &#39;r&#39;);
        //返回流
        $stream = fread($hf, filesize($file_path));
        fclose($hf);

        //匹配加的密码
        if(preg_match_all($reg, $stream, $res))
        {
          $count++;
          //清空盐
          $stream = str_replace($res[0][0], &#39;&#39;, $stream);
          //输出文件
          file_put_contents($temp_dir . &#39;\\&#39; . $res[1][0], $stream);

          //是否为复制
          //1为复制,0为删除(默认)
          if(!$is_copy)
          {
            echo "成功解密删除 : " . $temp_dir . &#39;\\&#39; . $res[1][0] . "\r\n";
            @unlink($file_path);
          }
          else
          {
            echo "解密 : " . $temp_dir . &#39;\\&#39; . $res[1][0] . "\r\n";
          }
        }
        $time3 = microtime(1);
        echo "此图用时 ", ($time3 - $time2), " S\r\n", "已经用时 ", ($time3 - $time1), " S\r\n\r\n";
      }
    }
    if(!$count)
    {
      echo "没有有效的加密文件\r\n";
      return false;
    }
    echo "解密完成\r\n";
  }
  else
  {
    echo "path invalid ";
    return false;
  }
}

?>

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