DES加密和解密PHP等语言的方法

PHP的加解密函数

class DesComponent {
 var $key = 12345678;

 function encrypt($string) {

  $ivArray=array(0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF);
  $iv=null;
  foreach ($ivArray as $element)
   $iv.=CHR($element);

   $size = mcrypt_get_block_size ( MCRYPT_DES, MCRYPT_MODE_CBC ); 
       $string = $this->pkcs5Pad ( $string, $size ); 

  $data =  mcrypt_encrypt(MCRYPT_DES, $this->key, $string, MCRYPT_MODE_CBC, $iv);

  $data = base64_encode($data);
  return $data;
 }

 function decrypt($string) {

  $ivArray=array(0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF);
  $iv=null;
  foreach ($ivArray as $element)
   $iv.=CHR($element);

  $string = base64_decode($string);
  //echo("****");
  //echo($string);
  //echo("****");
  $result =  mcrypt_decrypt(MCRYPT_DES, $this->key, $string, MCRYPT_MODE_CBC, $iv);
   $result = $this->pkcs5Unpad( $result ); 

  return $result;
 }
 
 
  function pkcs5Pad($text, $blocksize) 
    { 
        $pad = $blocksize - (strlen ( $text ) % $blocksize); 
        return $text . str_repeat ( chr ( $pad ), $pad ); 
    } 
 
    function pkcs5Unpad($text) 
    { 
        $pad = ord ( $text {strlen ( $text ) - 1} ); 
        if ($pad > strlen ( $text )) 
            return false; 
        if (strspn ( $text, chr ( $pad ), strlen ( $text ) - $pad ) != $pad) 
            return false; 
        return substr ( $text, 0, - 1 * $pad ); 
    } 
 
}

$des = new DesComponent();
echo ($des->encrypt("19760519"));
echo "";

//die($des->decrypt("zLVdpYUM0qw="));
//die($des->decrypt("zLVdpYUM0qzEsNshEEI6Cg=="));

$t2 =$des->decrypt("zLVdpYUM0qw=");
echo $t2;
echo "--";
echo strlen($t2);
echo is_utf8($t2);

echo "";
$t3 = mb_convert_encoding($t2,"GB2312", "utf-8");
echo $t3;
echo "--";
echo strlen($t3);
echo is_utf8($t3);

echo "";

$t1 =$des->decrypt("zLVdpYUM0qzEsNshEEI6Cg==");
echo $t1;
echo "--";
echo strlen($t1);
echo is_utf8($t1);

echo "";
$t3 = mb_convert_encoding($t1, "utf-8","GB2312");
echo $t3;
echo "--";
echo strlen($t3);
echo is_utf8($t3);

function is_utf8($string) {
return preg_match(%^(?:
[x09x0Ax0Dx20-x7E] # ASCII
| [xC2-xDF][x80-xBF] # non-overlong 2-byte
| xE0[xA0-xBF][x80-xBF] # excluding overlongs
| [xE1-xECxEExEF][x80-xBF]{2} # straight 3-byte
| xED[x80-x9F][x80-xBF] # excluding surrogates
| xF0[x90-xBF][x80-xBF]{2} # planes 1-3
| [xF1-xF3][x80-xBF]{3} # planes 4-15
| xF4[x80-x8F][x80-xBF]{2} # plane 16
)*$%xs, $string);
}
?>

Java的加解密函数

package ghj1976.Demo;

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICEN