Client Example

SourcePro : Secure Communication Module User’s Guide : PART II Secure Sockets Package : Advanced Topics : Implementing Both Client and Server Authentication : Client Example

Client Example

Comments are included only for the lines that differ from the previous examples.

This example uses utility functions provided in args.h.

Example 7 – Writing a client program that performs client and server authentication

// File:

// examples\secsock\manual\ClientServerAuthenticationClient.cpp

#include <rw/secsock/RWSecureSocketContext.h>

#include <rw/secsock/RWSecureSocketPackageInit.h>

#include <rw/secsock/RWSecureSocketPortal.h>

#include <rw/network/RWInetAddr.h>

#include <rw/network/RWWinSockInfo.h>

#include <iostream>

#include <fstream>

#include "args.h"

#include "secsockexampledefs.h"

using std::cerr;

using std::cout;

using std::endl;

using std::ifstream;

int main(int argc, char **argv)

{

try {

RWWinSockInfo info;

RWSecureSocketPackageInit secsockInit;

#if defined(RW_SECSOCK_RNG_NEEDS_SEEDING)

RWSecureSocketPackageInit::seedRNGFromFile(SEED_DATA_FILE);

#endif

int port = parseClientCommandLine(argc, argv);

ifstream certf(CLIENT_CERT_FILE); //1

RWX509Certificate cert(certf);

ifstream keyf(CLIENT_PRIVATE_KEY_FILE); //2

RWPrivateKey key(keyf);

RWSecureSocketContext context;

context.prepareToAuthenticate(TRUSTED_CERTS_FILE); //3

context.setIdentity(cert,key); //4

RWInetAddr addr(port, "localhost");

RWSecureSocketPortal portal(addr, context);

portal.sendAtLeast("Hello World!");

}

catch (const RWxmsg& m) {

cerr << m.why() << endl;

}

return 0;

}

//1 Open the PEM file that contains the client’s certificate, and create the certificate object.

//2 Open the PEM file that contains the client’s private key, and create the key object.

//3 Set up the context so that it authenticates the server using the certificates trusted by the client.

//4 Establish the identity of this client so that the server can verify its identity.