兼容PHP和Java的des加密解密代码分享

<?php
class des
{
	var $key;
	var $iv; //偏移量
 
	function des($key, $iv=0)
	{
		$this->key = $key;
		if($iv == 0)
		{
			$this->iv = $key;
		}
		else 
		{
			$this->iv = $iv;
		}
	}
 
	//加密
	function encrypt($str)
	{		
		$size = mcrypt_get_block_size ( mcrypt_des, mcrypt_mode_cbc );
		$str = $this->pkcs5pad ( $str, $size );
 
		$data=mcrypt_cbc(mcrypt_des, $this->key, $str, mcrypt_encrypt, $this->iv);
		//$data=strtoupper(bin2hex($data)); //返回大写十六进制字符串
		return base64_encode($data);
	}
 
	//解密
	function decrypt($str)
	{
		$str = base64_decode ($str);
		//$strbin = $this->hex2bin( strtolower($str));
		$str = mcrypt_cbc(mcrypt_des, $this->key, $str, mcrypt_decrypt, $this->iv );
		$str = $this->pkcs5unpad( $str );
		return $str;
	}
 
	function hex2bin($hexdata)
	{
		$bindata = "";
		for($i = 0; $i < strlen ( $hexdata ); $i += 2)
		{
			$bindata .= chr(hexdec(substr($hexdata, $i, 2)));
		}
		return $bindata;
	}
 
	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 );
	}
}
$str = 'abcd';
$key= 'asdfwef5';
$crypt = new des($key);
$mstr = $crypt->encrypt($str);
$str = $crypt->decrypt($mstr);
 
echo $str.' <=> '.$mstr;
 
?>

package com.test;
 
import it.sauronsoftware.base64.base64;
 
import java.security.key;
import java.security.securerandom;
import java.security.spec.algorithmparameterspec;
 
import javax.crypto.cipher;
import javax.crypto.secretkeyfactory;
import javax.crypto.spec.deskeyspec;
import javax.crypto.spec.ivparameterspec;
 
public class main
{
 public static final string algorithm_des = "des/cbc/pkcs5padding";
 /**
  * des算法，加密
  *
  * @param data 待加密字符串
  * @param key 加密私钥，长度不能够小于8位
  * @return 加密后的字节数组，一般结合base64编码使用
  * @throws cryptexception 异常
  */
 public static string encode(string key,string data) throws exception
 {
  return encode(key, data.getbytes());
 }
 /**
  * des算法，加密
  *
  * @param data 待加密字符串
  * @param key 加密私钥，长度不能够小于8位
  * @return 加密后的字节数组，一般结合base64编码使用
  * @throws cryptexception 异常
  */
 public static string encode(string key,byte[] data) throws exception
 {
  try
  {
	 	deskeyspec dks = new deskeyspec(key.getbytes());
 
	 	secretkeyfactory keyfactory = secretkeyfactory.getinstance("des");
   //key的长度不能够小于8位字节
   key secretkey = keyfactory.generatesecret(dks);
   cipher cipher = cipher.getinstance(algorithm_des);
   ivparameterspec iv = new ivparameterspec(key.getbytes());
   algorithmparameterspec paramspec = iv;
   cipher.init(cipher.encrypt_mode, secretkey,paramspec);
 
   byte[] bytes = cipher.dofinal(data);
 
 
//   return byte2hex(bytes);
   return new string(base64.encode(bytes));
  } catch (exception e)
  {
   throw new exception(e);
  }
 }
 
 /**
  * des算法，解密
  *
  * @param data 待解密字符串
  * @param key 解密私钥，长度不能够小于8位
  * @return 解密后的字节数组
  * @throws exception 异常
  */
 public static byte[] decode(string key,byte[] data) throws exception
 {
  try
  {
  	securerandom sr = new securerandom();
	 	deskeyspec dks = new deskeyspec(key.getbytes());
	 	secretkeyfactory keyfactory = secretkeyfactory.getinstance("des");
   //key的长度不能够小于8位字节
   key secretkey = keyfactory.generatesecret(dks);
   cipher cipher = cipher.getinstance(algorithm_des);
   ivparameterspec iv = new ivparameterspec(key.getbytes());
   algorithmparameterspec paramspec = iv;
   cipher.init(cipher.decrypt_mode, secretkey,paramspec);
   return cipher.dofinal(data);
  } catch (exception e)
  {
   throw new exception(e);
  }
 }
 
 /**
  * 获取编码后的值
  * @param key
  * @param data
  * @return
  * @throws exception
  */
 public static string decodevalue(string key,string data) 
 {
 	byte[] datas;
 	string value = null;
		try {
 
	 		datas = decode(key, base64.decode(data.getbytes()));
 
			value = new string(datas);
		} catch (exception e) {
			value = "";
		}
 	return value;
 }
 
 public static void main(string[] args) throws exception
 {
 	system.out.println("明：abcd ；密：" + main.encode("asdfwef5","abcd"));
 }
}