php 3Des加密解密兼容java

<?php
class Crypt3Des 
{
	public $key = "xxxxxxxxxxxxxxx"; //密钥 要与java的转化成的16进制字符串对应
		
	//数据加密
 	function encrypt($input)
 	{
 		$size = mcrypt_get_block_size(MCRYPT_3DES,'ecb');
 		$input = $this->pkcs5_pad($input, $size);
 		$key = str_pad($this->key,24,'0');
 		$td = mcrypt_module_open(MCRYPT_3DES, '', 'ecb', '');
 		$iv = @mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
 		@mcrypt_generic_init($td, $key, $iv);
 		$data = mcrypt_generic($td, $input);
 		mcrypt_generic_deinit($td);
 		mcrypt_module_close($td);
 		$data = base64_encode($data);
 		return $data;
 	}
 	//数据解密
 	function decrypt($encrypted)
 	{
 		$encrypted = base64_decode($encrypted);
 		$key = str_pad($this->key,24,'0');
 		$td = mcrypt_module_open(MCRYPT_3DES,'','ecb','');
 		$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td),MCRYPT_RAND);
 		$ks = mcrypt_enc_get_key_size($td);
 		@mcrypt_generic_init($td, $key, $iv);
 		$decrypted = mdecrypt_generic($td, $encrypted);
 		mcrypt_generic_deinit($td);
 		mcrypt_module_close($td);
 		$y=$this->pkcs5_unpad($decrypted);
 		return $y;
 	}
 	
 	function pkcs5_pad ($text, $blocksize) 
 	{
 		$pad = $blocksize - (strlen($text) % $blocksize);
 		return $text . str_repeat(chr($pad), $pad);
 	}
 	
	function pkcs5_unpad($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);
 	}
 
 	
}
?>