将创建加密密钥的 PHP 代码转换为 C# MD5

Question

我正在尝试将创建加密密钥的以下代码转换为 c# 结果我需要$key ** 和 ** $iv

$passphrase = 'asdfghjkl';

$salt =  '123456789' // for test purposes I fixed the value but it should be openssl_random_pseudo_bytes(8);

        $salted = '';

        $dx = '';

        while (strlen($salted) < 48) {

            $dx = md5($dx . $passphrase . $salt, true);

            $salted .= $dx;

        }

        $key = substr($salted, 0, 32);

        $iv = substr($salted, 32, 16);

到目前为止我能做什么

string passphrase = "asdfghjkl";

string salt = "123456789";

string key, iv;

byte[] salted = new byte[0];

byte[] dx = new byte[0];

while (salted.Length < 48)

      {

        string a = passphrase + salt;

        byte[] b = Encoding.UTF8.GetBytes(a);

        byte[] rv = new byte[dx.Length + b.Length];

        System.Buffer.BlockCopy(dx, 0, rv, 0, dx.Length);

        System.Buffer.BlockCopy(b, 0, rv, dx.Length, b.Length);

        //dx = MD5CryptoServiceProvider.Create().ComputeHash(rv);

        using (MD5 md5 = MD5.Create())

              {

                dx = md5.ComputeHash(rv);

              }

        byte[] rx = new byte[salted.Length + dx.Length];

        System.Buffer.BlockCopy(salted, 0, rx, 0, salted.Length);

        System.Buffer.BlockCopy(dx, 0, rx, salted.Length, dx.Length);

        salted = rx;

      }

string utfString1 = Encoding.UTF8.GetString(salted);

key = utfString1.Substring( 0, 32);

iv = utfString1.Substring(32, 16);

但我没有得到相同的结果

Answer 1

被调用的 PHPmd5函数将以原始二进制格式（16 字节）返回 md5 哈希值。这是 .NET 中的等效项。...var passphrase = Encoding.UTF8.GetBytes("asdfghjkl");var salt = Encoding.UTF8.GetBytes("123456789");var salted = new List<byte>();var dx = new byte[0];using (var md5 = MD5.Create()){    do    {        var bytesToHash = dx.Concat(passphrase).Concat(salt);        dx = md5.ComputeHash(bytesToHash.ToArray());        salted.AddRange(dx);    } while (salted.Count < 48);}var key = salted.Take(32).ToArray();var iv = salted.Skip(32).Take(16).ToArray();...如果要检查输出，请使用 PHP base64_encode函数和 .NET Convert.ToBase64String，然后比较 base64 字符串。