(PowerShell) SMTP Login Secure

Demonstrates how to set the SMTP password using a secure string.

This example requires Chilkat v9.5.0.71 or greater.

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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.

$mailman = New-Object Chilkat.MailMan

# Imagine we've previously saved our encrypted login and password within a JSON config file
# that contains this:

# {
#   "smtp_login": "D7lnlWY291LKMeChlvQq7N/Tg7ieuSB15a+9Ekyd0R4=",
#   "smtp_password": "5neIq9Jmn0E3p71N6Yc8TA=="
# }

$json = New-Object Chilkat.JsonObject
$json.LoadFile("qa_data/passwords/smtp.json")

$crypt = New-Object Chilkat.Crypt2

# These are the encryption settings we previously used to encrypt the credentials within the JSON config file.
$crypt.CryptAlgorithm = "aes"
$crypt.CipherMode = "cbc"
$crypt.KeyLength = 128
$crypt.SetEncodedKey("000102030405060708090A0B0C0D0E0F","hex")
$crypt.SetEncodedIV("000102030405060708090A0B0C0D0E0F","hex")
$crypt.EncodingMode = "base64"

$ssLogin = New-Object Chilkat.SecureString
$ssPassword = New-Object Chilkat.SecureString

# Decrypt to the secure string.  (the strings will still held in memory encrypted, but are now encrypted using
# a randomly generated session key.)
$crypt.DecryptSecureENC($json.StringOf("smtp_login"),$ssLogin)
$crypt.DecryptSecureENC($json.StringOf("smtp_password"),$ssPassword)

# Set the SMTP domain, login, and password
$mailman.SmtpHost = "smtp.gmail.com"
$mailman.SmtpSsl = $true
$mailman.SmtpPort = 465

$mailman.SmtpUsername = $ssLogin.Access()
# Set the SmtpPassword property via the SetPassword method using the secure string.
$mailman.SetPassword("smtp",$ssPassword)

# Connect and authenticate..
$success = $mailman.SmtpConnect()
if ($success -ne $true) {
    $($mailman.LastErrorText)
    exit
}

$success = $mailman.SmtpAuthenticate()
if ($success -ne $true) {
    $($mailman.LastErrorText)
    exit
}

$("SMTP login successful.")

# ...

$mailman.CloseSmtpConnection()