(PowerShell) Secure FTP with Client Certificate

Chilkat FTP2 provides the ability to use a client certificate with secure FTP (implicit or explicit SSL/TLS). This example demonstrates how to load a certificate from a .pfx and use it as the client-side SSL cert. Note: Client-side certificates are only needed in situations where the server demands one.

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

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

$ftp = New-Object Chilkat.Ftp2

$ftp.Hostname = "ftp.***.com"
$ftp.Port = 21
$ftp.Username = "test"
$ftp.Password = "test"

# This example will use explict TLS/SSL.
# Establish an explicit secure channel after connection
# on the standard FTP port 21.
$ftp.AuthTls = $true

# The Ssl property is for establishing an implicit SSL connection
# on port 990.  Because this example uses explicit SSL, it 
# should remain $false.
$ftp.Ssl = $false

# Load a certificate from a .pfx
# A PFX may contain several certs, including the certificates
# in a chain of authority.
$certStore = New-Object Chilkat.CertStore

$password = "***"
# Load the certs from a PFX into an in-memory certificate store:
$success = $certStore.LoadPfxFile("chilkat.pfx",$password)
if ($success -ne $true) {
    $($certStore.LastErrorText)
    exit
}

# Find the exact cert we'll use:

$cert = $certStore.FindCertBySubject("Chilkat Software, Inc.")
if ($certStore.LastMethodSuccess -eq $false) {
    $("Certificate not found!")
    exit
}

# Use this certificate for our secure (SSL/TLS) connection:
$success = $ftp.SetSslClientCert($cert)

# Connect and login to the FTP server.  The connection is 
# made secure because of the AuthTls setting.
$success = $ftp.Connect()
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}
else {
    # LastErrorText contains information even when
    # successful. This allows you to visually verify
    # that the secure connection actually occurred.
    $($ftp.LastErrorText)
}

$("Secure FTP Channel Established!")

# Do whatever you're doing to do ...
# upload files, download files, etc...

# .....
# .....

$success = $ftp.Disconnect()