0

我正在通过.Net开发一个mvc应用程序，以保护我在web.config中的敏感信息我的模型中有两个函数可以使用Triple DES加密和解密信息，但是我是新手并成功达到在朋友的帮助下到这里，并在这里寻求一些在线帮助。

但是现在当我尝试在我的 PC 中执行代码时，我收到了这个错误：

Cannot resolve symbol GetSHA256String

在使用此方法的加密和解密函数中。

我在这里缺少目录吗？请帮我解决这个问题。

public static string Encrypt(string Message, string Passphrase, out byte[] iv)
    {
        byte[] Results;
        System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();
        MD5CryptoServiceProvider HashProvider = new MD5CryptoServiceProvider();
        byte[] TDESKey = HashProvider.ComputeHash(UTF8.GetBytes(GetSHA256String(Passphrase)));
        TripleDESCryptoServiceProvider TDESAlgorithm = new TripleDESCryptoServiceProvider();
        TDESAlgorithm.Key = TDESKey;
        TDESAlgorithm.Mode = CipherMode.ECB;
        TDESAlgorithm.Padding = PaddingMode.PKCS7;
        // Capture the randomly generated IV
        iv = TDESAlgorithm.IV;
        byte[] DataToEncrypt = UTF8.GetBytes(Message);
        try
        {
            ICryptoTransform Encryptor = TDESAlgorithm.CreateEncryptor();
            Results = Encryptor.TransformFinalBlock(DataToEncrypt, 0, DataToEncrypt.Length);
        }
        finally
        {
            TDESAlgorithm.Clear();
            HashProvider.Clear();
        }
        return Convert.ToBase64String(Results);
        //return Encoding.UTF8.GetString(Results);
    }

    public static string Decrypt(string Message, string Passphrase, byte[] iv)
    {
        byte[] Results;
        System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();
        MD5CryptoServiceProvider HashProvider = new MD5CryptoServiceProvider();
        byte[] TDESKey = HashProvider.ComputeHash(UTF8.GetBytes(GetSHA256String(Passphrase)));
        TripleDESCryptoServiceProvider TDESAlgorithm = new TripleDESCryptoServiceProvider();
        TDESAlgorithm.Key = TDESKey;
        // Apply the same IV used during encryption
        TDESAlgorithm.IV = iv;
        TDESAlgorithm.Mode = CipherMode.ECB;
        TDESAlgorithm.Padding = PaddingMode.PKCS7;
        try
        {
            byte[] DataToDecrypt = Convert.FromBase64String(Message);
            //byte[] DataToDecrypt = UTF8.GetBytes(Message);
            //byte[] DataToDecrypt = Encoding.UTF8.GetBytes(Message);
            ICryptoTransform Decryptor = TDESAlgorithm.CreateDecryptor();
            Results = Decryptor.TransformFinalBlock(DataToDecrypt, 0, DataToDecrypt.Length); // << ERROR is here.
        }
        finally
        {
            TDESAlgorithm.Clear();
            HashProvider.Clear();
        }
        return UTF8.GetString(Results);
    }
4

1 回答 1

2

我相信您需要将类似于此方法的内容添加到您的课程中：

private string GetSHA256String(string text)
{
    var UE = new UnicodeEncoding();
    var message = UE.GetBytes(text);

    var hashString = new SHA256Managed();
    var hex = string.Empty;

    var hashValue = hashString.ComputeHash(message);
    foreach (byte b in hashValue)
    {
        hex += String.Format("{0:x2}", b);
    }
    return hex;
}

让我知道这是否有用。

于 2012-07-09T00:48:42.697 回答