欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  php教程

兼容PHP和Java的des加密解密代码分享

程序员文章站 2024-04-02 21:41:22
...
php代码:

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 ( $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;
 
?>

java代码:

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"));
  }
}