I have given certificate and password to a server that accepts ssl connection. I tried to make a connection to this server but authentication fails, well mainly because I dont know how to use that file and password that I was given.

Here is my code:

```
    X509Certificate certificate = new X509Certificate(
        @"c:\mySrvKeystore", KEY_PASSWORD);

    public static bool ValidateCertificate(
        object sender,
        X509Certificate certificate,
        X509Chain chain,
        SslPolicyErrors errors)
    {
        if (errors == SslPolicyErrors.None)
            return true;

        Console.WriteLine("Certificate error: {0}", errors);
        return false;
    }

    public void RunClient(string address, int port)
    {
        Console.WriteLine("Starting client...");
        var client = new TcpClient(address, port);

        Console.WriteLine("Client connected.");

        var stream = new SslStream(client.GetStream(),false,
            ValidateCertificate, null);

        try
        {
            stream.AuthenticateAsClient(address);

            Console.WriteLine(stream.IsAuthenticated ? "Client authenticated." : "Client is not authenticated.");

            //TODO constantly read from server!
        }
        catch (AuthenticationException ae)
        {
            Console.WriteLine("Exception occured: {0}", ae.Message);

            if (ae.InnerException != null)
            {
                Console.WriteLine("Inner exception: {0}", ae.InnerException.Message);
            }

            Console.WriteLine("Failed to authenticate! closing the client...");

            client.Close();

            return;
        }
        catch (Exception ex)
        {
            Console.WriteLine("General exception occured {0}", ex.Message);
            client.Close();
            return;
        }
    }

```

So as you can see, there is no code in my code that somehow tells the server (either TcpClient or SSLStream) that I do have this file and key!

I have a javacode that connects to server with no problem, but I failed to convert it to c# yet. Any helps would be great!

```
    String keyPassword = "123456";
    // String keyPassword = "importkey";

    try {
        KeyManagerFactory keyManagerFactory;

        keyManagerFactory = KeyManagerFactory.getInstance("SunX509");
        KeyStore keyStore = KeyStore.getInstance("JKS");
        InputStream keyInput = new FileInputStream("c:\\mySrvKeystore");
        keyStore.load(keyInput, keyPassword.toCharArray());
        keyInput.close();
        keyManagerFactory.init(keyStore, keyPassword.toCharArray());

        SSLContext sc = SSLContext.getInstance("SSL");
        sc.init(keyManagerFactory.getKeyManagers(), trustAllCerts, new java.security.SecureRandom());
        SSLSocketFactory sslsocketfactory = sc.getSocketFactory();
        this.sslsocket = (SSLSocket) sslsocketfactory.createSocket(host, port);

    } catch (java.security.NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (java.security.KeyManagementException e) {
        e.printStackTrace();
    } catch (java.security.KeyStoreException e) {
        e.printStackTrace();
    } catch (java.security.cert.CertificateException e) {
        e.printStackTrace();
    } catch (java.security.UnrecoverableKeyException e) {
        e.printStackTrace();
    } finally {}
}

public void run() {
    try {
        InputStream inputstream = sslsocket.getInputStream();
        InputStreamReader inputstreamreader = new InputStreamReader(inputstream);
        BufferedReader bufferedreader = new BufferedReader(inputstreamreader);

        OutputStream outputstream = System.out;
        OutputStreamWriter outputstreamwriter = new OutputStreamWriter(outputstream);
        BufferedWriter bufferedwriter = new BufferedWriter(outputstreamwriter);

        //get text from server and stuff...no deal!

```

**UPDATE**

After converting the key to p12 according to *gtrig* the problem now is IOException in `AutheneticateAsClient` method here:

```
        try
        {
            var certificate = new X509Certificate2(@"d:\mySrvKeystore.p12", "123456");

            X509Certificate2[] X509Certificates = {certificate};
            var certsCollection = new X509CertificateCollection(X509Certificates);

            //IO EXCEPTION HERE-->
            stream.AuthenticateAsClient(address, certsCollection, SslProtocols.Ssl2, false);
            Console.WriteLine(stream.IsAuthenticated ? "Client authenticated." : "Client is not authenticated.");

            //TODO constantly read from server!
        }

```

Also when I use the `SSlProtocols.Default` the error is: `RemoteCertificateNameMismatch, RemoteCertificateChainErrors`