sslstream | 易学教程

How to create SSLStream which uses Ssl3 instead of Tls

阅读更多关于 How to create SSLStream which uses Ssl3 instead of Tls

问题 I'm trying to establish tcp connection which is encrypted using Ssl3. Basically I'm just creating TCP connection and than I'm creating SSLStream on top of that: var ss = new SslStream(poolItem.SecureConnection, false, remoteCertificateValidationCallback); ss.ReadTimeout = ss.WriteTimeout = timeout; ss.AuthenticateAsClient(host); var pp = ss.SslProtocol; My problem is that by default SslStream uses TLS. I want for it to be Ssl3. In HttpWebRequest, you can use following code to change the

Does SslStream use LocalCertificateSelectionCallback when acting as a server?

阅读更多关于 Does SslStream use LocalCertificateSelectionCallback when acting as a server?

问题 If I create a SslStream instance like this: secureStream = new SslStream(stream, true, tlsRemoteCallback, tlsLocalCallback); And then I use one of the AuthenticateAsServer or BeginAuthenticateAsServer methods, is it at all possible for the LocalCertificateSelectionCallback (tlsLocalCallback) to be invoked? And if so, how? I'm under the impression this isn't possible, because the AuthenticateAsServer method requires an X509Certificate parameter. And if you pass null, then it throws an

Asynchronous SslStream Error [closed]

阅读更多关于 Asynchronous SslStream Error [closed]

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 7 years ago . I created an Asynchronous SslStream Listener but it did not receive the message from the client properly The Listener Code Code Removed joran i don't

Asking SslStream to accept ONLY a certificate signed by a particular public key

阅读更多关于 Asking SslStream to accept ONLY a certificate signed by a particular public key

问题 I have a working implementation of this but want to make sure it is secure. The goal is to use SSLStream and only accept SSL certificates from the server that are signed by a particular RSA key. Here is my connection code: var client = new TcpClient("server_address", port_number); var sslStream = new SslStream(client.GetStream(), false, new RemoteCertificateValidationCallback(ValidateServerCertificate), null); sslStream.AuthenticateAsClient("SpeechGrid"); And here is my implementation of

.Net SslStream Write/Read issue

阅读更多关于 .Net SslStream Write/Read issue

问题 When I read an a .Net SSLStream, I can't seem to read it all in one go. The read method always gets the first byte only. I need to loop to get the remaining data no matter the data or buffer size. Example : Client var message = new byte[]{1,2,3,4,5}; sslStream.Write(messsage); sslStream.Flush(); Server byte[] buffer = new byte[4000]; bytes = sslStream.Read(buffer, 0, buffer.Length); Am I doing something wrong ? Why is it reading only one byte on the first read ? 回答1: Streaming APIs do not

SslStream.WriteAsync “The BeginWrite method cannot be called when another write operation is pending”

阅读更多关于 SslStream.WriteAsync “The BeginWrite method cannot be called when another write operation is pending”

问题 How to prevent this issue when writing data to the client Asynchronously The BeginWrite method cannot be called when another write operation is pending MYCODE public async void Send(byte[] buffer) { if (buffer == null) return; await SslStream.WriteAsync(buffer, 0, buffer.Length); } 回答1: It is important to understand exactly what the await keyword does: An await expression does not block the thread on which it is executing. Instead, it causes the compiler to sign up the rest of the async

Mutual SSL Authentication - Local certificate in sslstream returning 'null' instead of certificate on client

阅读更多关于 Mutual SSL Authentication - Local certificate in sslstream returning 'null' instead of certificate on client

问题 I am working on creating an windows service which will make a call to a API. For this process, I am trying to establish a Mutual (Two way) SSL authentication. Since I am newbie to this. I tried to implement a simple client and server project which will authenticate mutually. I have created the self signed certificate exchanged and added in trusted certificates. My Client using System; using System.Configuration; using System.Net.Security; using System.Net.Sockets; using System.Security

client and server cannot communicate, because they do not possess a common algorithm - SSLStream

阅读更多关于 client and server cannot communicate, because they do not possess a common algorithm - SSLStream

There are lot of similar questions already answered and none of the answers help my current scenario. In the windows service we have TCPL SSL stream and client connecting to the stream. I have created a .NET Client and am able to access the server successfully with Strict TLS 1.2 using IIS Crypto. We are trying to access the server using Lantronix xport Pro and the below line throws exception stream.AuthenticateAsServer(serverCertificate, false, SslProtocols.Ssl3| SslProtocols.Tls | SslProtocols.Tls11 | SslProtocols.Tls12, True); Exception happens only if strict TLS 1.2 is enabled. If we have

client and server cannot communicate, because they do not possess a common algorithm - SSLStream

阅读更多关于 client and server cannot communicate, because they do not possess a common algorithm - SSLStream

问题 There are lot of similar questions already answered and none of the answers help my current scenario. In the windows service we have TCPL SSL stream and client connecting to the stream. I have created a .NET Client and am able to access the server successfully with Strict TLS 1.2 using IIS Crypto. We are trying to access the server using Lantronix xport Pro and the below line throws exception stream.AuthenticateAsServer(serverCertificate, false, SslProtocols.Ssl3| SslProtocols.Tls |

X509Certificate2 the server mode SSL must use a certificate with the associated private key

阅读更多关于 X509Certificate2 the server mode SSL must use a certificate with the associated private key

问题 I use SslStream to build a web server. However, the code below throws an exception when AuthenticateAsServer. static X509Certificate cert; protected virtual Stream GetStream(TcpClient client) { var ss = new SslStream(client.GetStream(), false); if (cert == null) { cert = X509Certificate2.CreateFromCertFile("test.cer"); } ss.AuthenticateAsServer(cert, false, System.Security.Authentication.SslProtocols.Tls, true); return ss; } I've already used X509Certificate2 to load the cert file why it