Secure socket

hello everyone, am a novice at programming, i was told to code a client/server interaction, i came up with this but i need to secure it so that when a client connects, instead of showing "YourMessage", it is suppose to show something elseAttachment 11364Attachment 11365Attachment 11366Attachment 11367

you could look into something like openssl or gnutls. otherwise, you could roll your own security with encryption and hashing, using something like cryptopp.

Thank you, though what am looking for is a small code to insert into this code:

Code:

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server:

#include "wind.h"

using namespace std;

//begi
void main()
{

    long answer ;
    WSAData wsaData;
    WORD DLLVERSION;
    DLLVERSION = MAKEWORD(2,1);

    answer = WSAStartup(DLLVERSION, &wsaData);

    SOCKADDR_IN addr;
    int addrlen = sizeof(addr);

 SOCKET slisten;
 SOCKET  sConnect;

 sConnect = socket(AF_INET,SOCK_STREAM,NULL);

 addr.sin_addr.s_addr = inet_addr("127.0.0.1");
 addr.sin_family = AF_INET;

 addr.sin_port = htons(1234);

 slisten = socket(AF_INET,SOCK_STREAM,NULL);

 bind(slisten, (SOCKADDR*)&addr, sizeof(addr));
 // unlimited clients
 listen(slisten, SOMAXCONN);

 //conditions
 for(;;)



      {
cout <<"waiting for client" <<endl;
if (sConnect = accept(slisten,(SOCKADDR*)&addr, &addrlen))
      {
          cout<<" A connection was found" <<endl;

          answer = send(sConnect,      "YourMessage", 12 ,NULL);

      }

 }
}

client:

#include "clnt.h"

using namespace std;

void main ()
{
 string confirm;
 char message[200];
  string strmessage;

long answer;
WSAData wsaData;
WORD DLLVersion;
DLLVersion = MAKEWORD(2,1);
answer = WSAStartup(DLLVersion, &wsaData);



SOCKADDR_IN addr;
 int addrlen = sizeof(addr);

  SOCKET sconnect;

  sconnect = socket(AF_INET,      SOCK_STREAM,NULL);

  addr.sin_addr.s_addr = inet_addr("127.0.0.1");

  addr.sin_family = AF_INET;

  addr.sin_port = htons(1234);


cout <<" Do you want to connect to your server?[Y/N]" <<endl;
cin>> confirm;
if(confirm == "N")
{
      exit(1);
    }
      else
    {
        if(confirm == "Y")
        {
          connect(sconnect,    (SOCKADDR*)&addr, sizeof(addr));
          answer = recv(sconnect, message, sizeof(message), NULL);
          strmessage = message;
          cout << strmessage <<endl;
          getchar();
        }

    }

getchar();
}

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it's not that simple. there is no standard, OS-integrated method for security of low level sockets. your best bet is to use openssl or one of the wrappers that exist for it, like boost::asio. you will need to do this on both the server and the client.

Quote:

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Originally Posted by danny1

Thank you, though what am looking for is a small code to insert into this code:

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That's what I'd like a lot of the time too. "I'd like some small code to insert to create a GUI front-end for my database", "I'd like some small code to insert to facilitate concurrency for various aspects of this process", etc. Guess what? I usually don't get what I'd like ;)

If you go with SSL, you'll also have to create a self-signed SSL certificate for the server.

Quote:

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Originally Posted by MK27

If you go with SSL, you'll also have to create a self-signed SSL certificate for the server.

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or get one from a registered certification authority for free from here.