Question

我有一个问题，我怎么能从Windows 2008服务器上找到私钥。

首先我用公钥加密数据，我从网址HTTPS中提取它像这样：

 public static string Encrypt(string Data)
    {
        try
        {
            var Crypto = new RSACryptoServiceProvider(2048);
            var RsaKeyInfo = Crypto.ExportParameters(false);
            RsaKeyInfo.Modulus = PublicKeyByte();
            Crypto.ImportParameters(RsaKeyInfo);

            var bytesData = Encoding.Unicode.GetBytes(Data);
            var bytesCypherText = Crypto.Encrypt(bytesData, false);
            var cypherText = Convert.ToBase64String(bytesCypherText);

            return cypherText;
        }
        catch (Exception ex)
        {

            return null;
        }
    }
    private static byte[] PublicKeyByte()
    {
        Uri u = new Uri("https:\\domain.com");
        ServicePoint sp = ServicePointManager.FindServicePoint(u);

        string groupName = Guid.NewGuid().ToString();
        HttpWebRequest req = HttpWebRequest.Create(u) as HttpWebRequest;
        req.ConnectionGroupName = groupName;

        using (WebResponse resp = req.GetResponse())
        {

        }
        sp.CloseConnectionGroup(groupName);
        return sp.Certificate.GetPublicKey(); ;
    }

现在我不知道如何在C＃中提取私钥来解密消息？我想知道更多关于这个的信息

感谢，

Answer 1

我解决了这个问题，方法是使用System.Security.Cryptography.X509Certificates提取证书文件.PFX和im进行加密和解密：

public static string Encrypt(string data)
    {
        try
        {
            var path = @"certificate.pfx";
            var password = "test";
            var collection = new X509Certificate2Collection();
            collection.Import(path, password, X509KeyStorageFlags.PersistKeySet);
            var certificate = collection[0];
            var publicKey = certificate.PublicKey.Key as RSACryptoServiceProvider;
            var bytesData = Convert.FromBase64String(data);
            var encryptedData = publicKey.Encrypt(bytesData, false);
            var cypherText = Convert.ToBase64String(encryptedData);

            return cypherText;
        }
        catch (Exception ex)
        {

            return null;
        }
    }
    public static string Decrypt(string data)
    {
        try
        {
            var path = @"certificate.pfx";
            var password = "test";
            var collection = new X509Certificate2Collection();
            collection.Import(path, password, X509KeyStorageFlags.PersistKeySet);
            var certificate = collection[0];

            var privateKey = certificate.PrivateKey as RSACryptoServiceProvider;
            var bytesData = Convert.FromBase64String(data);
            var dataByte = privateKey.Decrypt(bytesData, false);
            return Convert.ToBase64String(dataByte);
         }
        catch (Exception ex)
        {
            return "";
        }
    }

使用私钥RSA解密消息

1 个答案: