Java

IMAP over Multiple Hop SSH

Demonstrates how to read IMAP email (using TCP or TLS) tunneled through mulitple-hop SSH. The scheme looks like this:

Application => ServerSSH1 => ServerSSH2 => IMAPServer

The ConnectThroughSsh and UseSsh methods are added in Chilkat version 9.5.0.55 to accomplish this task.

Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Imap;
import com.chilkatsoft.chilkat2.Ssh;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example assumes the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Ssh ssh1 = new Ssh();

        // Connect directly to the 1st SSH server.
        try {
            ssh1.connect("serverssh1.com", 22);

            // Authenticate using login/password:
            ssh1.authenticatePw("ssh1Login", "ssh1Password");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Connect through the 1st SSH connection to reach a 2nd SSH server.
        // Note: Any number of SSH connections may be simultaneously tunneled through a single
        // existing SSH connection.
        Ssh ssh2 = new Ssh();
        try {
            ssh2.connectThroughSsh(ssh1, "serverssh2.com", 22);

            // Authenticate with ssh2...
            ssh2.authenticatePw("ssh2Login", "ssh2Password");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        Imap imap = new Imap();

        // Tell the IMAP object to connect to the IMAP server though the ssh2 tunnel (which itself is routed through ssh1).
        // The connection looks like this:  Application => ServerSSH1 => ServerSSH2 => IMAPServer
        try {
            imap.useSsh(ssh2);

            imap.setSsl(true);
            imap.setPort(993);

            // Connect to an IMAP server (through the multi-hop SSH tunnel)
            imap.connect("imap.someimapserver.com");

            // Login
            imap.login("myLogin", "myPassword");

            // Do whatever needs to be done...  for example,

            // Create the new email folder (sub-mailbox) on the IMAP server.
            // If no folder path is provided, the new folder is a sub-mailbox of Inbox.
            imap.createMailbox("newFolder");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Success.");

        // Close the connection with the IMAP server.  (This closes the tunnel through ssh2)
        // The connection with ssh2 is still alive, and may be used for more connections.
        imap.disconnect();

        // Close the connection with ssh2.  (This closes the the tunnel through ssh1.)
        // The connection with ssh1 is still alive, and may be used for more connections.
        ssh2.disconnect();

        ssh1.disconnect();
    }
}