(Go) 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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    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    listenSslSocket := chilkat.NewSocket()

    // 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.)
    certStore := chilkat.NewCertStore()
    // The 1st argument is the filename, the 2nd arg is the 
    // PFX file's password:
    success := certStore.LoadPfxFile("chilkat.pfx","test")
    if success != true {
        fmt.Println(certStore.LastErrorText())
        listenSslSocket.DisposeSocket()
        certStore.DisposeCertStore()
        return
    }

    // Find the certificate to be used for SSL:
    // cert is a Cert
    cert := certStore.FindCertBySubject("Chilkat Software, Inc.")
    if certStore.LastMethodSuccess() == false {
        fmt.Println(certStore.LastErrorText())
        listenSslSocket.DisposeSocket()
        certStore.DisposeCertStore()
        return
    }

    // Use the certificate:
    success = listenSslSocket.InitSslServer(cert)
    if success != true {
        cert.DisposeCert()
        fmt.Println(listenSslSocket.LastErrorText())
        listenSslSocket.DisposeSocket()
        certStore.DisposeCertStore()
        return
    }

    cert.DisposeCert()

    // Bind and listen on a port:
    myPort := 8123
    // Allow for a max of 5 queued connect requests.
    backLog := 5
    success = listenSslSocket.BindAndListen(myPort,backLog)
    if success != true {
        fmt.Println(listenSslSocket.LastErrorText())
        listenSslSocket.DisposeSocket()
        certStore.DisposeCertStore()
        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.SetMaxReadIdleMs(10000)
    listenSslSocket.SetMaxSendIdleMs(10000)

    // Accept a single client connection and establish the secure SSL/TLS channel:
    // clientSock is a Socket
    maxWaitMillisec := 20000
    clientSock := listenSslSocket.AcceptNextConnection(maxWaitMillisec)
    if listenSslSocket.LastMethodSuccess() == false {
        fmt.Println(listenSslSocket.LastErrorText())
        listenSslSocket.DisposeSocket()
        certStore.DisposeCertStore()
        return
    }

    // The client (in this example) is going to send a "Hello Server! -EOM-" 
    // message.  Read it:
    receivedMsg := clientSock.ReceiveUntilMatch("-EOM-")
    if clientSock.LastMethodSuccess() != true {
        fmt.Println(clientSock.LastErrorText())
        listenSslSocket.DisposeSocket()
        certStore.DisposeCertStore()
        return
    }

    fmt.Println(*receivedMsg)

    // Send a "Hello Client! -EOM-" message:
    success = clientSock.SendString("Hello Client! -EOM-")
    if success != true {
        fmt.Println(clientSock.LastErrorText())
        listenSslSocket.DisposeSocket()
        certStore.DisposeCertStore()
        return
    }

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

    clientSock.DisposeSocket()

    listenSslSocket.DisposeSocket()
    certStore.DisposeCertStore()