(Perl) 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.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

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

$ssh1 = chilkat::CkSsh->new();

# Connect directly to the 1st SSH server.
$success = $ssh1->Connect("serverssh1.com",22);
if ($success != 1) {
    print $ssh1->lastErrorText() . "\r\n";
    exit;
}

# Authenticate using login/password:
$success = $ssh1->AuthenticatePw("ssh1Login","ssh1Password");
if ($success != 1) {
    print $ssh1->lastErrorText() . "\r\n";
    exit;
}

# 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.
$ssh2 = chilkat::CkSsh->new();
$success = $ssh2->ConnectThroughSsh($ssh1,"serverssh2.com",22);
if ($success != 1) {
    print $ssh2->lastErrorText() . "\r\n";
    exit;
}

# Authenticate with ssh2...
$success = $ssh2->AuthenticatePw("ssh2Login","ssh2Password");
if ($success != 1) {
    print $ssh2->lastErrorText() . "\r\n";
    exit;
}

$imap = chilkat::CkImap->new();

# 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
$success = $imap->UseSsh($ssh2);
if ($success != 1) {
    print $imap->lastErrorText() . "\r\n";
    exit;
}

$imap->put_Ssl(1);
$imap->put_Port(993);

# Connect to an IMAP server (through the multi-hop SSH tunnel)
$success = $imap->Connect("imap.someimapserver.com");
if ($success != 1) {
    print $imap->lastErrorText() . "\r\n";
    exit;
}

# Login
$success = $imap->Login("myLogin","myPassword");
if ($success != 1) {
    print $imap->lastErrorText() . "\r\n";
    exit;
}

# 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.
$success = $imap->CreateMailbox("newFolder");
if ($success != 1) {
    print $imap->lastErrorText() . "\r\n";
    exit;
}

print "Success." . "\r\n";

# 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.
$success = $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();