Jquery中文网 www.jquerycn.cn
Jquery中文网 >  脚本编程  >  php  >  正文 关于des加密与解密实现方法(php net两个版本)

关于des加密与解密实现方法(php net两个版本)

发布时间:2015-08-07   编辑:www.jquerycn.cn
des加密算法,加密与解密实现方法(php net两个版本),感兴趣的朋友,可以看看,说不好哪天就用上了。

des加密算法,加密与解密实现方法(php net两个版本),感兴趣的朋友,可以看看,说不好哪天就用上了。

必须说明的是:如果是php5.x及以上版本,需要添加php扩展php_mcrypt,记住哦。

一、PHP版
 

复 制 代码示例:

<?php
/**
  des 加密 解密
*/
class STD3Des
{
private $key = "";
private $iv = "";

/**
* 构造,传递二个已经进行base64_encode的KEY与IV
*
* @param string $key
* @param string $iv
*/
function __construct ($key, $iv)
{
if (empty($key) || empty($iv)) {
echo 'key and iv is not valid';
exit();
}
$this->key = $key;
$this->iv = $iv;
}

/**
*加密
* @param <type> $value
* @return <type>
*/
public function encrypt ($value)
{
$td = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');
$iv = base64_decode($this->iv);
$value = $this->PaddingPKCS7($value);
$key = base64_decode($this->key);
mcrypt_generic_init($td, $key, $iv);
$ret = base64_encode(mcrypt_generic($td, $value));
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return $ret;
}

/**
*解密
* @param <type> $value
* @return <type>
*/
public function decrypt ($value)
{
$td = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');
$iv = base64_decode($this->iv);
$key = base64_decode($this->key);
mcrypt_generic_init($td, $key, $iv);
$ret = trim(mdecrypt_generic($td, base64_decode($value)));
$ret = $this->UnPaddingPKCS7($ret);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return $ret;
}

private function PaddingPKCS7 ($data)
{
$block_size = mcrypt_get_block_size('tripledes', 'cbc');
$padding_char = $block_size - (strlen($data) % $block_size);
$data .= str_repeat(chr($padding_char), $padding_char);
return $data;
}

private function UnPaddingPKCS7($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);
}
}

//使用
include('STD3Des.class.php');
$key='abcdefgh';
$iv='abcdefgh';
$msg='test string';
$des=new STD3Des(base64_encode($key),base64_encode($iv));
$rs1=$des->encrypt($msg);
echo $rs1.'<br />';
$rs2=$des->decrypt($rs1);
echo $rs2;

2、.net版本
 

复 制 代码示例:

//des 加密 解密
sealed public class CryptoHelper
{
/// <summary>
/// Encrypts the specified input.
/// </summary>
/// <param name="input">The input.</param>
/// <param name="key">key</param>
/// <param name="iv">iv</param>
/// <returns></returns>
public static string EncryptDes(string input, byte[] key, byte[] iv)
{
if (input == null || input.Length == 0)
return String.Empty;

DESCryptoServiceProvider des = new DESCryptoServiceProvider();
MemoryStream ms = null;
CryptoStream encStream = null;
StreamWriter sw = null;
string result = String.Empty;

try
{
ms = new MemoryStream();

// Create a CryptoStream using the memory stream and the
// CSP DES key.
//des.Mode = CipherMode.CBC;
//des.Padding = PaddingMode.PKCS7;
encStream = new CryptoStream(ms, des.CreateEncryptor(key, iv), CryptoStreamMode.Write);

// Create a StreamWriter to write a string
// to the stream.
sw = new StreamWriter(encStream);

// Write the plaintext to the stream.
sw.Write(input);

sw.Flush();
encStream.FlushFinalBlock();
ms.Flush();

result = Convert.ToBase64String(ms.GetBuffer(), 0, Convert.ToInt32(ms.Length, CultureInfo.InvariantCulture));
}
finally
{
//close objects
if (sw != null)
sw.Close();
if (encStream != null)
encStream.Close();
if (ms != null)
ms.Close();
}

// Return the encrypted string
return result;
}
/// <summary>
/// Decrypts the specified input.
/// </summary>
/// <param name="input">the input.</param>
/// <param name="key">key</param>
/// <param name="iv">iv</param>
/// <returns></returns>
public static string DecryptDes(string input, byte[] key, byte[] iv)
{
byte[] buffer;
try { buffer = Convert.FromBase64String(input); }
catch (System.ArgumentNullException) { return String.Empty; }
// length is zero, or not an even multiple of four (plus a few other cases)
catch (System.FormatException) { return String.Empty; }

DESCryptoServiceProvider des = new DESCryptoServiceProvider();
MemoryStream ms = null;
CryptoStream encStream = null;
StreamReader sr = null;
string result = String.Empty;

try
{
ms = new MemoryStream(buffer);

// Create a CryptoStream using the memory stream and the
// CSP DES key.
encStream = new CryptoStream(ms, des.CreateDecryptor(key, iv), CryptoStreamMode.Read);

// Create a StreamReader for reading the stream.
sr = new StreamReader(encStream);

// Read the stream as a string.
result = sr.ReadToEnd();
}
finally
{
//close objects
if (sr != null)
sr.Close();
if (encStream != null)
encStream.Close();
if (ms != null)
ms.Close();
}

return result;
}
}

//调用
string key = "abcdefgh";
string iv = "abcdefgh";
string msg="test string";
string rs1 = CryptoHelper.EncryptDes(msg, System.Text.Encoding.ASCII.GetBytes(key), System.Text.Encoding.ASCII.GetBytes(iv));
string rs2 = CryptoHelper.DecryptDes(rs1, System.Text.Encoding.ASCII.GetBytes(key), System.Text.Encoding.ASCII.GetBytes(iv));

看完以上两段代码,不知道你有收获没有?个人比较喜欢php版的des加密与解密方法,简洁清晰。
jquery中文网(www.jquerycn.cn),专心为您。

 

您可能感兴趣的文章:
关于des加密与解密实现方法(php net两个版本)
php使用3des加密的代码(兼容.net)
asp.net实现RSA加密
php MD5加密详解
修改mysql密码的一些方法
PHP可逆加密与解密函数
忘记MySql的root密码的解决方法
php生成随机产生六位数密码的代码
linux上ssh配置指南
php实现记住密码自动登录的功能

关键词: php加密解密   
[关闭]