Unicode C

Open an SSH Tunnel

Demonstrates Socket.SshOpenTunnel, which connects to an SSH server and initializes an SSH tunneling session, then authenticates it.

Background. An SSH tunnel lets a socket reach a destination host through an SSH server using port forwarding. The sequence is: open the tunnel, authenticate, then open forwarded channels to destinations.

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Unicode C

#include <C_CkSocketW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkSocketW socket;
    const wchar_t *sshPassword;

    success = FALSE;

    socket = CkSocketW_Create();

    //  Connect to the SSH server and initialize an SSH tunneling session.  Port 22 is conventional but
    //  not required.
    success = CkSocketW_SshOpenTunnel(socket,L"ssh.example.com",22);
    if (success == FALSE) {
        wprintf(L"%s\n",CkSocketW_lastErrorText(socket));
        CkSocketW_Dispose(socket);
        return;
    }

    //  After the tunnel is open, authenticate before opening forwarded channels.
    //  The SSH password should come from a secure source rather than being hard-coded.
    sshPassword = L"mySshPassword";
    success = CkSocketW_SshAuthenticatePw(socket,L"sshUser",sshPassword);
    if (success == FALSE) {
        wprintf(L"%s\n",CkSocketW_lastErrorText(socket));
        CkSocketW_Dispose(socket);
        return;
    }

    wprintf(L"SSH tunnel established and authenticated.\n");


    CkSocketW_Dispose(socket);

    }