(PowerShell) 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 .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

# Hostname may be an IP address or domain name:
$hostname = "192.168.1.111"
$port = 22

# Connect directly to the 1st SSH server:
$success = $ssh1.Connect($hostname,$port)
if ($success -ne $true) {
    $($ssh1.LastErrorText)
    exit
}

# Authenticate using login/password:
$success = $ssh1.AuthenticatePw("myLogin","myPassword")
if ($success -ne $true) {
    $($ssh1.LastErrorText)
    exit
}

# 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.
$sftp = New-Object Chilkat.SFtp

# Connect to some SSH/SFTP server through ssh1.
$success = $sftp.ConnectThroughSsh($ssh1,"sftp.someremoteserver.com",22)
if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

# Authenticate with the SFTP server. 
$success = $sftp.AuthenticatePw("myLogin","myPassword")
if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

# After authenticating, the SFTP subsystem must be initialized:
$success = $sftp.InitializeSftp()
if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

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

$success = $sftp.UploadFileByName($remoteFilePath,$localFilePath)
if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

$("Success.")

# 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()