php3DES加密如何兼容Java

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Java源码：

import java.security.Security;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class ThreeDES {

private static final String Algorithm = "DESede"; //定义 加密算法,可用 DES,DESede,Blowfish
    
    //keybyte为加密密钥，长度为24字节
    //src为被加密的数据缓冲区（源）
    public static byte[] encryptMode(byte[] keybyte, byte[] src) {
       try {
            //生成密钥
            SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);

            //加密
            Cipher c1 = Cipher.getInstance(Algorithm);
            c1.init(Cipher.ENCRYPT_MODE, deskey);
            return c1.doFinal(src);
        } catch (java.security.NoSuchAlgorithmException e1) {
            e1.printStackTrace();
        } catch (javax.crypto.NoSuchPaddingException e2) {
            e2.printStackTrace();
        } catch (java.lang.Exception e3) {
            e3.printStackTrace();
        }
        return null;
    }

    //keybyte为加密密钥，长度为24字节
    //src为加密后的缓冲区
    public static byte[] decryptMode(byte[] keybyte, byte[] src) {      
    try {
            //生成密钥
            SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);

            //解密
            Cipher c1 = Cipher.getInstance(Algorithm);
            c1.init(Cipher.DECRYPT_MODE, deskey);
            return c1.doFinal(src);
        } catch (java.security.NoSuchAlgorithmException e1) {
            e1.printStackTrace();
        } catch (javax.crypto.NoSuchPaddingException e2) {
            e2.printStackTrace();
        } catch (java.lang.Exception e3) {
            e3.printStackTrace();
        }
        return null;
    }

    //转换成十六进制字符串
    public static String byte2hex(byte[] b) {
        String hs="";
        String stmp="";

        for (int n=0;n

class EasyCrypt3Des {
    private $_key = "helloworld";
 
    public function __construct($key=null) {
        if($key !== null)
            $this->_key = $key;
    }

    public function encrypt($str) {
        $td = $this->gettd();
        $ret = mcrypt_generic($td, $this->pkcs5_pad($str, 8));
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        return $this->strToHex($ret);
    }

    public function decrypt($str) {
        $td = $this->gettd();
        $ret = $this->pkcs5_unpad(mdecrypt_generic($td, $this->hexToStr($str)));
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        return $ret;
    }

    private function pkcs5_pad($text, $blocksize) {
        $pad = $blocksize - (strlen($text) % $blocksize);
        return $text . str_repeat(chr($pad), $pad);
    }

    private 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);
    }

    private function getiv() {
        return pack('H16', '0000000000000000');
    }

    private function gettd() {
        $iv = $this->getiv();
        $td = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_ECB, '');
        mcrypt_generic_init($td, $this->_key, $iv);
        return $td;
    }

    private function strToHex($string){
        $hex = '';
        for ($i=0; $i