(MFC) Multiple Hop SSH to SFTP

Demonstrates how to SFTP through an intermediate SSH server (multiple hop). The scheme looks like this:

Application => ServerSSH1 => ServerSFtp

The ConnectThroughSsh method is added in Chilkat version 9.5.0.55 to accomplish this task.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkSsh.h>
#include <CkSFtp.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSsh ssh1;

    // Hostname may be an IP address or domain name:
    const char *hostname = "192.168.1.111";
    const char *port = 22;

    // Connect directly to the 1st SSH server:
    bool success = ssh1.Connect(hostname,port);
    if (success != true) {
        strOut.append(ssh1.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Authenticate using login/password:
    success = ssh1.AuthenticatePw("myLogin","myPassword");
    if (success != true) {
        strOut.append(ssh1.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Connect through the 1st SSH connection to reach a 2nd SSH server (for SFTP)
    // Note: Any number of connections may be simultaneously tunneled through a single
    // existing SSH connection.
    CkSFtp sftp;

    // Connect to some SSH/SFTP server through ssh1.
    success = sftp.ConnectThroughSsh(ssh1,"sftp.someremoteserver.com",22);
    if (success != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Authenticate with the SFTP server. 
    success = sftp.AuthenticatePw("myLogin","myPassword");
    if (success != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // After authenticating, the SFTP subsystem must be initialized:
    success = sftp.InitializeSftp();
    if (success != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Upload from the local file to the SSH server.
    // Important -- the remote filepath is the 1st argument,
    // the local filepath is the 2nd argument;
    const char *remoteFilePath = "hamlet.xml";
    const char *localFilePath = "c:/temp/hamlet.xml";

    success = sftp.UploadFileByName(remoteFilePath,localFilePath);
    if (success != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append("Success.");
    strOut.append("\r\n");

    // Close the connection with the SFTP server.(This closes the the tunnel through ssh1.)
    // The connection with ssh1 is still alive, and may be used for more connections.
    sftp.Disconnect();

    // ...
    // ...
    // ...

    ssh1.Disconnect();


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }