IMAP SSH Tunneling (Port Forwarding)

Demonstrates how to setup an SSH tunnel for IMAP.

Download Chilkat Java Library

Download Chilkat Java x64 Library

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    CkImap imap = new CkImap();

    boolean success;

    //  Anything unlocks the component and begins a fully-functional 30-day trial.
    success = imap.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        System.out.println(imap.lastErrorText());
        return;
    }

    //  Connect to an SSH server and establish the SSH tunnel:
    String sshHostname;
    int sshPort;
    //  The SSH hostname may be a hostname or an
    //  IP address, such as "192.168.1.108".
    //  The port is typically 22 (the standard port for SSH).
    sshHostname = "www.mysshserver.com";
    sshPort = 22;
    success = imap.SshTunnel(sshHostname,sshPort);
    if (success != true) {
        System.out.println(imap.lastErrorText());
        return;
    }

    //  Authenticate with the SSH server via a login/password
    //  or with a public key.
    //  This example demonstrates SSH password authentication.
    //  Note: This is not authenticating with the IMAP server, it is
    //  for authenticating with the SSH server, which is separate.
    success = imap.SshAuthenticatePw("mySshLogin","mySshPassword");
    if (success != true) {
        System.out.println(imap.lastErrorText());
        return;
    }

    //  OK, the SSH tunnel is setup.  The IMAP component may
    //  be used exactly the same as usual, except all communications
    //  are sent through the SSH tunnel.

    //  Connect to an IMAP server via the SSH tunnel.
    //  Because the SSH tunnel has been previously setup,
    //  this does not establish a direct connection with the IMAP
    //  server.  It directs the SSH server to establish the connection.
    success = imap.Connect("mail.chilkatsoft.com");
    if (success != true) {
        System.out.println(imap.lastErrorText());
        return;
    }

    //  Authenticate with the IMAP server via the SSH tunnel.
    success = imap.Login("myLogin","myPassword");
    if (success != true) {
        System.out.println(imap.lastErrorText());
        return;
    }

    //  Select an IMAP mailbox
    success = imap.SelectMailbox("Inbox");
    if (success != true) {
        System.out.println(imap.lastErrorText());
        return;
    }

    CkMessageSet messageSet;
    //  We can choose to fetch UIDs or sequence numbers.
    boolean fetchUids;
    fetchUids = true;
    //  Get the message IDs of all the emails in the mailbox
    messageSet = imap.Search("ALL",fetchUids);
    if (messageSet == null ) {
        System.out.println(imap.lastErrorText());
        return;
    }

    //  Fetch the emails into a bundle object:
    CkEmailBundle bundle;
    bundle = imap.FetchBundle(messageSet);
    if (bundle == null ) {

        System.out.println(imap.lastErrorText());
        return;
    }

    //  Loop over the bundle and display the FROM and SUBJECT of each.
    int i;
    for (i = 0; i <= bundle.get_MessageCount() - 1; i++) {
        CkEmail email;
        email = bundle.GetEmail(i);
        System.out.println(email.ck_from());
        System.out.println(email.subject());
        System.out.println("--");

    }

    //  Disconnect from the IMAP server.
    imap.Disconnect();


  }
}