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PHP与asp.net C#可共用的可逆加密算法

发布时间:2022-02-13 14:15 所属栏目:121 来源:互联网
导读:因为工作需我们需要在php中生成加密然后在asp.net中接受过来的密码再解密,下面我找到一个PHP与asp.net C#可共用的可逆加密算法,有需要了解的同学可参考. php加密算法,代码如下: ?php class DES { var $key; var $iv; //偏移量 function DES($key = 11001100,
  因为工作需我们需要在php中生成加密然后在asp.net中接受过来的密码再解密,下面我找到一个PHP与asp.net C#可共用的可逆加密算法,有需要了解的同学可参考.
 
  php加密算法,代码如下:
 
  <?php
  class DES
  {
      var $key;
      var $iv; //偏移量
       
      function DES($key = '11001100', $iv=0 ) {
      //key长度8例如:1234abcd
          $this->key = $key;
          if( $iv == 0 ) {
              $this->iv = $key; //默认以$key 作为 iv
          } else {
              $this->iv = $iv; //mcrypt_create_iv ( mcrypt_get_block_size (MCRYPT_DES, MCRYPT_MODE_CBC), MCRYPT_DEV_RANDOM );
          }
      }
       
      function encrypt($str) {
      //加密,返回大写十六进制字符串
          $size = mcrypt_get_block_size ( MCRYPT_DES, MCRYPT_MODE_CBC );
          $str = $this->pkcs5Pad ( $str, $size );
          return strtoupper( bin2hex( mcrypt_cbc(MCRYPT_DES, $this->key, $str, MCRYPT_ENCRYPT, $this->iv ) ) );
      }
       
      function decrypt($str) {
      //解密
          $strBin = $this->hex2bin( strtolower( $str ) );
          $str = mcrypt_cbc( MCRYPT_DES, $this->key, $strBin, MCRYPT_DECRYPT, $this->iv );
          $str = $this->pkcs5Unpad( $str );
          return $str;
      }
       
      function hex2bin($hexData) {
          $binData = "";
          for($i = 0; $i < strlen ( $hexData ); $i += 2) {
              $binData .= chr ( hexdec ( substr ( $hexData, $i, 2 ) ) );
          }
          return $binData;
      }
  
      function pkcs5Pad($text, $blocksize) {
          $pad = $blocksize - (strlen ( $text ) % $blocksize);
          return $text . str_repeat ( chr ( $pad ), $pad );
      }
       
      function pkcs5Unpad($text) {
          $pad = ord ( $text {strlen ( $text ) - 1} );
          //开源代码Cuoxin.com
          if ($pad > strlen ( $text ))
              return false;
          if (strspn ( $text, chr ( $pad ), strlen ( $text ) - $pad ) != $pad)
              return false;
          return substr ( $text, 0, - 1 * $pad );
      }
       
  }
  ?>
  asp.net程序代码,代码如下:
 
  using System;
  using System.Collections.Generic;
  using System.IO;
  using System.Linq;
  using System.Security.Cryptography;
  using System.Text;
  
  namespace WindowsFormsApplication1
  {
      /// <summary>
      /// DES加密解密字符串
      /// </summary>
      public class DesEncryption
      {
          /// <summary>
          /// DES加密字符串
          /// </summary>
          /// <param name="encryptString">待加密的字符串</param>
          /// <param name="encryptKey">加密密钥,要求为8位</param>
          /// <returns>加密成功返回加密后的字符串,失败返回null</returns>
          public static string EncryptDES(string encryptString, string encryptKey = "11001100")
          {
              try
              {
                  byte[] rgbKey = ASCIIEncoding.ASCII.GetBytes(encryptKey.Substring(0, 8));
                  byte[] rgbIV = rgbKey;
                  byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
                  DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
                  MemoryStream mStream = new MemoryStream();
                  CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                  cStream.Write(inputByteArray, 0, inputByteArray.Length);
                  cStream.FlushFinalBlock();
                  StringBuilder ret = new StringBuilder();
                  foreach (byte b in mStream.ToArray())
                  {
                      ret.AppendFormat("{0:X2}", b);
                  }
                  ret.ToString();
                  return ret.ToString();  
              }
              catch
              {
                  return null;
              }
          }
  
          /// <summary>
          /// DES解密字符串
          /// </summary>
          /// <param name="decryptString">待解密的字符串</param>
          /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
          /// <returns>解密成功返回解密后的字符串,失败返回null</returns>
          public static string DecryptDES(string decryptString, string decryptKey = "11001100")
          {
              try
              {
                  byte[] rgbKey = ASCIIEncoding.ASCII.GetBytes(decryptKey);
                  byte[] rgbIV = rgbKey;
                  byte[] inputByteArray = new byte[decryptString.Length / 2];
                  for (int x = 0; x < decryptString.Length / 2; x++)
                  {
                      int i = (Convert.ToInt32(decryptString.Substring(x * 2, 2), 16));
                      inputByteArray[x] = (byte)i;
                  }             
                  DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
                  MemoryStream mStream = new MemoryStream();
                  CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                  cStream.Write(inputByteArray, 0, inputByteArray.Length);
                  cStream.FlushFinalBlock();
                  return Encoding.UTF8.GetString(mStream.ToArray());
              }
              catch
              {
                  return null;
              }
          }
      }
  }
 

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