(PowerShell) Using WS_FTP Self-signed Certificate file (.crt) and Private Key File. (.key)

Demonstrates how to use a self-signed certificate created by WS_FTP with Chilkat FTP2.

Note: It is usually not necessary for the FTP client to use a client-side certificate. Most FTP servers using SSL and TLS connections (explicit or implicit) do not require client-side certs. In addition, some high-security FTP servers require "real" certificates -- meaning certificates issued by a real certificate authority with a chain of authentication that leads to a trusted root certificate. The certificates created by WS_FTP are self-signed and untrusted.

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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.

# Important:  Before running this program, convert your
# .crt and .key files to a .p12 using OpenSSL:
# The command is this:
# openssl pkcs12 -export -in test.crt -inkey test.key -out test.p12
# 

$ftp = New-Object Chilkat.Ftp2

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

# 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

# Create an instance of a certificate store object, load a .p12 file,
# locate the certificate we need, and use it for signing.
# (a P12/PFX file may contain more than one certificate.)
$certStore = New-Object Chilkat.CertStore
# The 1st argument is the filename, the 2nd arg is the 
# .p12 file's password.  (OpenSSL will prompty you to set a password
# when converting the .crt and .key into a .p12).
$success = $certStore.LoadPfxFile("test.p12","secret")
if ($success -ne $true) {
    $($certStore.LastErrorText)
    exit
}

$cert = $certStore.FindCertBySubjectCN("Your cert's common name")
if ($certStore.LastMethodSuccess -eq $false) {
    $($certStore.LastErrorText)
    exit
}

$success = $ftp.SetSslClientCert($cert)

# Connect and login to the FTP server.
$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!")
$($ftp.LastErrorText)

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

# ...
# ...

$success = $ftp.Disconnect()