(PowerShell) 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 .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

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

$ssh1 = New-Object Chilkat.Ssh

# Connect directly to the 1st SSH server.
$success = $ssh1.Connect("serverssh1.com",22)
if ($success -ne $true) {
    $($ssh1.LastErrorText)
    exit
}

# Authenticate using login/password:
$success = $ssh1.AuthenticatePw("ssh1Login","ssh1Password")
if ($success -ne $true) {
    $($ssh1.LastErrorText)
    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 = New-Object Chilkat.Ssh
$success = $ssh2.ConnectThroughSsh($ssh1,"serverssh2.com",22)
if ($success -ne $true) {
    $($ssh2.LastErrorText)
    exit
}

# Authenticate with ssh2...
$success = $ssh2.AuthenticatePw("ssh2Login","ssh2Password")
if ($success -ne $true) {
    $($ssh2.LastErrorText)
    exit
}

$imap = New-Object Chilkat.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
$success = $imap.UseSsh($ssh2)
if ($success -ne $true) {
    $($imap.LastErrorText)
    exit
}

$imap.Ssl = $true
$imap.Port = 993

# Connect to an IMAP server (through the multi-hop SSH tunnel)
$success = $imap.Connect("imap.someimapserver.com")
if ($success -ne $true) {
    $($imap.LastErrorText)
    exit
}

# Login
$success = $imap.Login("myLogin","myPassword")
if ($success -ne $true) {
    $($imap.LastErrorText)
    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 -ne $true) {
    $($imap.LastErrorText)
    exit
}

$("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.
$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()