C# 使用Rijndael的跨平台（php到C.NET）加密/解密第2部分

变化，基本上只是由于某种原因而波动

我也想更改钥匙，但由于与IV问题类似的原因无法更改，所以希望有人能帮我解决这个问题

我试过下面的方法，但无法使它与C协调工作，也许一旦我解决了IV问题，我也能解决这个问题

  $key = pack('H*', "bcb04b7e103a0cd8b54763051cef08bc55abe029fdebae5e1d417e2ffb2a00a3"); )

PHP========================

<?php
  $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC);
  $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
  //$iv = "45287112549354892144548565456541";
  $key = "anjueolkdiwpoida";

  $text = "This is my encrypted message";
  $crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_CBC, $iv);
  $crypttext = urlencode($crypttext);
  $crypttext64=base64_encode($crypttext);
  print($crypttext64) . "\n<br/>";
  print(base64encode($iv)) . "\n<br/>";
?>

string iv = Encoding.UTF8.GetString(Convert.FromBase64String("SOME IV STRING I COPY FROM BROSWER WITH ABOVE PHP LOADED"));
string kyy = "anjueolkdiwpoida";
//ciphertext is also SOME TXT STRING I COPIED FROM BROWSER WITH ABOVE PHP LOADED
string plainText = ValidationControls.DecryptRJ256(cipherText, kyy, iv);



public byte[] Decode(string str)
    {
        var decbuff = Convert.FromBase64String(str);
        return decbuff;
    }

    static public String DecryptRJ256(byte[] cypher, string KeyString, string IVString)
    {
        var sRet = "";

        var encoding = new UTF8Encoding();
        var Key = encoding.GetBytes(KeyString);
        var IV = encoding.GetBytes(IVString);

        using (var rj = new RijndaelManaged())
        {
            try
            {
                rj.Padding = PaddingMode.PKCS7;
                rj.Mode = CipherMode.CBC;
                rj.KeySize = 256;
                rj.BlockSize = 256;
                rj.Key = Key;
                rj.IV = IV;
                var ms = new MemoryStream(cypher);

                using (var cs = new CryptoStream(ms, rj.CreateDecryptor(Key, IV), CryptoStreamMode.Read))
                {
                    using (var sr = new StreamReader(cs))
                    {
                        sRet = sr.ReadLine();
                    }
                }
            }
            catch (Exception exc) { Console.WriteLine(exc.Message); App.Current.Shutdown(); }
            finally
            {
                rj.Clear();
            }
        }

        return sRet;
    }

我意识到.NET解码Base64字符串真的很奇怪。当我调用DecryptRJ256时，我通过一系列转换base64\u string->byte->utf8\u string将从php代码接收到的密钥和IV发送到函数中，然后将它们发送到函数中。解决这个问题的方法是直接发送字节数组，然后让DecryptRJ256直接处理它

执行上述操作后，自动密钥和IV生成的问题变得明显，不再是问题

根据问题修改代码：

PHP

C

$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$key = pack('H*', "bcb04b7e103a0cd8b54763051cef08bc55abe029fdebae5e1d417e2ffb2a00a3");
$text = "This is my encrypted message";

$crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_CBC, $iv);

$crypttext = base64_encode($crypttext);
$key= base64_encode($key);
$iv = base64_encode($iv);

string plainText = ValidationControls.DecryptRJ256(Convert.FromBase64String("/*$CRYPTTEXT STRING FROM PHP*/"), Convert.FromBase64String("/*$KEY STRING FROM PHP*/"), Convert.FromBase64String("/*$ STRING FROM PHP*/"));

static public String DecryptRJ256(byte[] cypher, byte[] KeyString, byte[] IVString)
    {
        ...
        var Key = KeyString;
        //var Key = encoding.GetBytes(KeyString);
        var IV = IVString;
        //var IV = encoding.GetBytes(IVString);
        ...
    }