php 3Des加密解密兼容java

<?php

classCrypt3Des

{

    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

    functionencrypt($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

    functiondecrypt($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;

    }

     

    functionpkcs5_pad ($text,$blocksize)

    {

        $pad=$blocksize- (strlen($text) %$blocksize);

        return$text.str_repeat(chr($pad),$pad);

    }

     

    functionpkcs5_unpad($text)

    {

        $pad= ord($text{strlen($text)-1});

        if($pad>strlen($text))

        {

        returnfalse;

        }

        if(strspn($text,chr($pad),strlen($text) -$pad) !=$pad)

        {

            returnfalse;

        }

        returnsubstr($text, 0, -1 *$pad);

    }

  

     

}

?>