Net,PHP 3DES 相同

做一个项目 需要跟PHP通信 3Des加密方法

PHP的方法如下

<?php

class Crypt3Des
{  
  public $key  = "12345678901234567890123456789012";
  public $iv  = "23456789";
  
  //加密
  public function encrypt($input)
  {
    $input = $this->padding( $input );
    $key = base64_decode($this->key);
    $td = mcrypt_module_open( MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');
    //使用MCRYPT_3DES算法,cbc模式
    mcrypt_generic_init($td, $key, $this->iv);
    //初始处理
    $data = mcrypt_generic($td, $input);
    //加密
    mcrypt_generic_deinit($td);
    //结束
    mcrypt_module_close($td);
    $data = $this->removeBR(base64_encode($data));
    return $data;
  }
  
  //解密
  public function decrypt($encrypted)
  {
    $encrypted = base64_decode($encrypted);
    $key = base64_decode($this->key);
    $td = mcrypt_module_open( MCRYPT_3DES,'',MCRYPT_MODE_CBC,'');
    //使用MCRYPT_3DES算法,cbc模式
    mcrypt_generic_init($td, $key, $this->iv);
    //初始处理
    $decrypted = mdecrypt_generic($td, $encrypted);
    //解密
    mcrypt_generic_deinit($td);
    //结束
    mcrypt_module_close($td);
    $decrypted = $this->removePadding($decrypted);
    return $decrypted;
  }
  
  //填充密码，填充至8的倍数
  public function padding( $str )
  {
    $len = 8 - strlen( $str ) % 8;
    for ( $i = 0; $i < $len; $i++ )
    {
      $str .= chr( 0 );
    }
    return $str ;
  }
  
  //删除填充符
  public function removePadding( $str )
  {
    $len = strlen( $str );
    $newstr = "";
    $str = str_split($str);
    for ($i = 0; $i < $len; $i++ )
    {
      if ($str[$i] != chr( 0 ))
      {
        $newstr .= $str[$i];
      }
    }
    return $newstr;
  }
  
  //删除回车和换行
  public function removeBR( $str ) 
  {
    $len = strlen( $str );
    $newstr = "";
    $str = str_split($str);
    for ($i = 0; $i < $len; $i++ )
    {
      if ($str[$i] != '\n' and $str[$i] != '\r')
      {
        $newstr .= $str[$i];
      }
    }
  
    return $newstr;
  }

}

C# 方法如下:

  /// <summary>
  /// chyenc@163.com
  /// </summary>
  public class Php3Des
  {
    private static byte[] btev2 = ASCIIEncoding.UTF8.GetBytes("23456789");

    public static string Encrypt3DES(string a_strString, string a_strKey)
    {
      TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider();
      byte[] bte = Convert.FromBase64String(a_strKey);
      DES.Key = bte;
      DES.IV = btev2;
      DES.Mode = CipherMode.CBC;
      DES.Padding = System.Security.Cryptography.PaddingMode.Zeros;

      ICryptoTransform DESEncrypt = DES.CreateEncryptor();

      byte[] Buffer = ASCIIEncoding.UTF8.GetBytes(a_strString);
      string x64 = Convert.ToBase64String(DESEncrypt.TransformFinalBlock(Buffer, 0, Buffer.Length));


      return x64;
    }



    public static string Decrypt3DES(string a_strString, string a_strKey)
    {
      TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider();


      DES.Key = Convert.FromBase64String(a_strKey);
      DES.IV = btev2;
      DES.Mode = CipherMode.CBC;
      DES.Padding = System.Security.Cryptography.PaddingMode.Zeros;

      ICryptoTransform DESDecrypt = DES.CreateDecryptor();

      string result = "";
      try
      {
        byte[] Buffer = Convert.FromBase64String(a_strString);
        result = ASCIIEncoding.UTF7.GetString(DESDecrypt.TransformFinalBlock(Buffer, 0, Buffer.Length));
      }
      catch (Exception e)
      {

      }
      result = result.Replace("\0", "");

      return result;
    }
  }