Chilkat Examples

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C++ Examples

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(C++) 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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#include <CkSocket.h>
#include <CkCertStore.h>
#include <CkCert.h>

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

    CkSocket listenSslSocket;

    // 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.)
    CkCertStore certStore;
    // The 1st argument is the filename, the 2nd arg is the 
    // PFX file's password:
    bool success = certStore.LoadPfxFile("chilkat.pfx","test");
    if (success != true) {
        std::cout << certStore.lastErrorText() << "\r\n";
        return;
    }

    // Find the certificate to be used for SSL:
    CkCert *cert = 0;
    cert = certStore.FindCertBySubject("Chilkat Software, Inc.");
    if (certStore.get_LastMethodSuccess() == false) {
        std::cout << certStore.lastErrorText() << "\r\n";
        return;
    }

    // Use the certificate:
    success = listenSslSocket.InitSslServer(*cert);
    if (success != true) {
        delete cert;
        std::cout << listenSslSocket.lastErrorText() << "\r\n";
        return;
    }

    delete cert;

    // Bind and listen on a port:
    int myPort = 8123;
    // Allow for a max of 5 queued connect requests.
    int backLog = 5;
    success = listenSslSocket.BindAndListen(myPort,backLog);
    if (success != true) {
        std::cout << listenSslSocket.lastErrorText() << "\r\n";
        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.put_MaxReadIdleMs(10000);
    listenSslSocket.put_MaxSendIdleMs(10000);

    // Accept a single client connection and establish the secure SSL/TLS channel:
    CkSocket *clientSock = 0;
    int maxWaitMillisec = 20000;
    clientSock = listenSslSocket.AcceptNextConnection(maxWaitMillisec);
    if (listenSslSocket.get_LastMethodSuccess() == false) {
        std::cout << listenSslSocket.lastErrorText() << "\r\n";
        return;
    }

    // The client (in this example) is going to send a "Hello Server! -EOM-" 
    // message.  Read it:
    const char *receivedMsg = clientSock->receiveUntilMatch("-EOM-");
    if (clientSock->get_LastMethodSuccess() != true) {
        std::cout << clientSock->lastErrorText() << "\r\n";
        return;
    }

    std::cout << receivedMsg << "\r\n";

    // Send a "Hello Client! -EOM-" message:
    success = clientSock->SendString("Hello Client! -EOM-");
    if (success != true) {
        std::cout << clientSock->lastErrorText() << "\r\n";
        return;
    }

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

    delete clientSock;
    }

 

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