Java和PHP加解密

PHP代码

<?php
//DES加解密工具
class DesEncrypt {
    var $key;
    var $iv;
    function DesEncrypt($key, $iv=0) {
        $this->key = $key;
        if($iv == 0){
            $this->iv = $key;
        }else{
            $this->iv = $iv;
        }
    }
    function encrypt($input) {
        $size = mcrypt_get_block_size('des', 'ecb');
        $input = $this->pkcs5_pad($input, $size);
        $td = mcrypt_module_open('des', '', 'ecb', '');
        $iv = @mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        @mcrypt_generic_init($td, $this->key, $iv);
        $data = mcrypt_generic($td, $input);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        $data = base64_encode($data);
        return $data;

    }
    function decrypt($encrypted) {
        $encrypted = base64_decode($encrypted);
        $td = mcrypt_module_open('des','','ecb','');
        //使用MCRYPT_DES算法,cbc模式
        $iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        $ks = mcrypt_enc_get_key_size($td);
        $key = substr($this->key, 0, $ks);
        $rs = @mcrypt_generic_init($td, $key, $iv);
        //初始处理
        $decrypted = mdecrypt_generic($td, $encrypted);
        //解密
        mcrypt_generic_deinit($td);
        //结束
        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);
    }
}

$key = "123456789012345678901234567890123456";  //36位
$crypt = new DesEncrypt($key);
$str = "中国";
$mstr = $crypt->encrypt($str);
echo "密文:" . $mstr . "<br/>";

$str = $crypt->decrypt($mstr);
echo "明文:" . $str;

结果：

密文:Rm+8trB4CBQ=
明文:中国

Java代码

package com.util;
import java.security.Key;
import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

import org.apache.commons.codec.binary.Base64;

import com.util.DesEncrypt;

/**
 * 加密解密
 * @author bian
 * 2015 上午11:13:36
 */
public class DesEncrypt {
    Key key;
    public DesEncrypt(String str) {
        try{
            String key = str;
            setKey(key);// 生成密匙
        }catch(Exception e){
             
        }
    }

    public DesEncrypt() {
        setKey("heimazhifuqw233344");
    }

    /**
     * 根据参数生成KEY
     */
    public void setKey(String strKey) {
        try {
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            this.key  = keyFactory.generateSecret(new DESKeySpec(strKey.getBytes("UTF8")));
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        }
    }

    
    /**
     * 加密String明文输入,String密文输出
     */
    public String encrypt(String strMing) {
        byte[] byteMi = null;
        byte[] byteMing = null;
        String strMi = "";
        //BASE64Encoder base64en = new BASE64Encoder();
        try {
            byteMing = strMing.getBytes("UTF8");
            byteMi = this.getEncCode(byteMing);
            strMi = new String(Base64.encodeBase64(byteMi), "UTF8");
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        } finally {
            //base64en = null;
            byteMing = null;
            byteMi = null;
        }
        return strMi;
    }

    /**
     * 解密 以String密文输入,String明文输出
     * 
     * @param strMi
     * @return
     */
    public String decrypt(String strMi) {
        ///BASE64Decoder base64De = new BASE64Decoder();
        byte[] byteMing = null;
        byte[] byteMi = null;
        String strMing = "";
        try {
            byteMi = Base64.decodeBase64(strMi);
            byteMing = this.getDesCode(byteMi);
            strMing = new String(byteMing, "UTF8");
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        } finally {
            //base64De = null;
            byteMing = null;
            byteMi = null;
        }
        return strMing;
    }

    /**
     * 加密以byte[]明文输入,byte[]密文输出
     * 
     * @param byteS
     * @return
     */
    private byte[] getEncCode(byte[] byteS) {
        byte[] byteFina = null;
        Cipher cipher;
        try {
            cipher = Cipher.getInstance("DES");
            cipher.init(Cipher.ENCRYPT_MODE, key,SecureRandom.getInstance("SHA1PRNG"));
            byteFina = cipher.doFinal(byteS);
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        } finally {
            cipher = null;
        }
        return byteFina;
    }

    /**
     * 解密以byte[]密文输入,以byte[]明文输出
     * 
     * @param byteD
     * @return
     */
    private byte[] getDesCode(byte[] byteD) {
        Cipher cipher;
        byte[] byteFina = null;
        try {
            cipher = Cipher.getInstance("DES");
            cipher.init(Cipher.DECRYPT_MODE, key,SecureRandom.getInstance("SHA1PRNG"));
            byteFina = cipher.doFinal(byteD);
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        } finally {
            cipher = null;
        }
        return byteFina;
    }

    

    public static void main(String args[])  {
        String key = "123456789012345678901234567890123456";//36位
        String str = "中国";
        DesEncrypt des = new DesEncrypt(key);    
        
        // DES加密
        String mStr =   des.encrypt(str);
        // DES解密
        String deStr = des.decrypt(mStr);
        
        System.out.println("密文:" + mStr);
        System.out.println("明文:" + deStr);
    }
}

结果：

密文:Rm+8trB4CBQ=
明文:中国