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(PowerShell) FTP Connect, Examine Server Certificate, and then Authenticate

Demonstrates how to connect to an FTP server, examine the server's SSL/TLS certificate, and then, if it meets the application's security requirements, proceed to authenticate.

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Chilkat for Mono

[Reflection.Assembly]::LoadFile("C:\myAssemblies\ChilkatDotNet2.dll")

#  This example assumes Chilkat Ftp2 to have been previously unlocked.
#  See Unlock Ftp2 for sample code.

$ftp = New-Object Chilkat.Ftp2

$ftp.Hostname = "www.authtls-ftps-server.com"
$ftp.Username = "FTP_LOGIN"
$ftp.Password = "FTP_PASSWORD"
$ftp.AuthTls = $true
$ftp.Port = 21

#  Connect to the FTP server using explicit TLS (AUTH TLS).
$success = $ftp.ConnectOnly()
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

#  Get the FTP server's certificate.
$serverCert = $ftp.GetSslServerCert()
if ($ftp.LastMethodSuccess -ne $true) {
    $($ftp.LastErrorText)
    exit
}

#  Now that we have the certificate, we can check it in any way we desire.
#  (See the online reference documentation for the certificate object's methods
#  and properties)...

#  Assuming the certificate is OK, proceed to authenticate with the FTP server.
$success = $ftp.LoginAfterConnectOnly()
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

# 
#  Proceed with uploading/download files, etc...
# 

$ftp.Disconnect()
$("Success.")

 

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