使用私鑰RSA解密消息

Question

我有一個問題，如何從Windows 2008 Server中找到私鑰。

首先，我使用公開密鑰對數據加密，該數據是從URL HTTPS中提取的，如下所示：

 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(); ;
    }

現在我不知道如何在C＃中提取私鑰來解密消息？ 我想知道更多有關此的信息

謝謝，

Answer 1

我通過使用System.Security.Cryptography.X509Certificates進行加密和解密來提取證書文件.PFX和im來解決此問題：

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 "";
        }
    }