SSL Server Example

Demonstrates how to create an SSL socket for accepting connections. This example is *very* simple in that it will create an SSL socket for accepting a single connection. It will read a message from the client, send a reply, and exit.

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Chilkat.Socket listenSslSocket = new Chilkat.Socket();

//  Any string automatically begins a fully-functional 30-day trial.
bool success;
success = listenSslSocket.UnlockComponent("Anything for 30-day trial");
if (success != true) {
    MessageBox.Show("Failed to unlock component");
    return;
}

//  An SSL server needs a digital certificate.  This example loads it from a PFX file.

//  Create an instance of a certificate store object, load a PFX file,
//  locate the certificate we need, and use it.
//  (a PFX file may contain more than one certificate.)
Chilkat.CertStore certStore = new Chilkat.CertStore();
//  The 1st argument is the filename, the 2nd arg is the
//  PFX file's password:
success = certStore.LoadPfxFile("chilkat.pfx","test");
if (success != true) {
    MessageBox.Show(certStore.LastErrorText);
    return;
}

//  Find the certificate to be used for SSL:
Chilkat.Cert cert = null;
cert = certStore.FindCertBySubject("Chilkat Software, Inc.");
if (cert == null ) {
    MessageBox.Show(certStore.LastErrorText);
    return;
}

//  Use the certificate:
success = listenSslSocket.InitSslServer(cert);
if (success != true) {
    MessageBox.Show(listenSslSocket.LastErrorText);
    return;
}

//  Bind and listen on a port:
int myPort;
myPort = 8123;
//  Allow for a max of 5 queued connect requests.
int backLog;
backLog = 5;
success = listenSslSocket.BindAndListen(myPort,backLog);
if (success != true) {
    MessageBox.Show(listenSslSocket.LastErrorText);
    return;
}

//  If accepting an SSL/TLS connection, the SSL handshake is part of the connection
//  establishment process. This involves a few back-and-forth messages between the
//  client and server to establish algorithms and a shared key to create the secure
//  channel. The sending and receiving of these messages are governed by the
//  MaxReadIdleMs and MaxSendIdleMs properties. If these properties are set to 0
//  (and this is the default unless changed by your application), then the
//  AcceptNextConnection can hang indefinitely during the SSL handshake process.
//  Make sure these properties are set to appropriate values before calling AcceptNextConnection.

//  Set a 10 second max for waiting to read/write.  This is for the SSL/TLS handshake establishment.
listenSslSocket.MaxReadIdleMs = 10000;
listenSslSocket.MaxSendIdleMs = 10000;

//  Accept a single client connection and establish the secure SSL/TLS channel:
Chilkat.Socket clientSock = null;
int maxWaitMillisec;
maxWaitMillisec = 20000;
clientSock = listenSslSocket.AcceptNextConnection(maxWaitMillisec);
if (clientSock == null ) {
    MessageBox.Show(listenSslSocket.LastErrorText);
    return;
}

//  The client (in this example) is going to send a "Hello Server! -EOM-"
//  message.  Read it:
string receivedMsg;
receivedMsg = clientSock.ReceiveUntilMatch("-EOM-");
if (receivedMsg == null ) {
    MessageBox.Show(clientSock.LastErrorText);
    return;
}

MessageBox.Show(receivedMsg);

//  Send a "Hello Client! -EOM-" message:
success = clientSock.SendString("Hello Client! -EOM-");
if (success != true) {
    MessageBox.Show(clientSock.LastErrorText);
    return;
}

//  Close the connection with the client
//  Wait a max of 20 seconds (20000 millsec)
clientSock.Close(20000);