(PowerShell) Send aes-gcm authEnvelopedData Encrypted Email

See more SMTP Examples

Note: This example requires Chilkat v10.0.0 or later

Demonstrates how to send encrypted email using 128-bit AES in GCM mode.

"AES-GCM" (Advanced Encryption Standard - Galois/Counter Mode) is a cryptographic algorithm that provides both encryption and integrity protection (authentication). When used in the context of email security with "authEnvelopedData", it often refers to a method of securely sending encrypted and authenticated email content.

Here’s a brief breakdown:

• AES-GCM: Combines symmetric encryption (AES) with authentication, ensuring both the confidentiality and integrity of the message. It generates an authentication tag to detect any unauthorized changes.
• authEnvelopedData: Refers to a type of structure used in secure email protocols (like S/MIME) to package encrypted content. It contains the encrypted data and associated encrypted session keys.
• Email Security: When applied to emails, AES-GCM ensures the email content is encrypted (confidential) and also tamper-resistant (authenticated), with the encryption keys typically shared securely using asymmetric encryption (e.g., public key infrastructure, or PKI).

In short, AES-GCM with "authEnvelopedData" provides a way to encrypt and authenticate emails, making them confidential and resistant to tampering.

Chilkat .NET Downloads Chilkat .NET Assemblies

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

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

# The mailman object is used for sending and receiving email.
$mailman = New-Object Chilkat_9_5_0.MailMan

$mailman.SmtpHost = "smtp.example.com"

$mailman.SmtpUsername = "my_smtp_login"
$mailman.SmtpPassword = "my_smtp_password"

# The typical SMTP ports are 465 for implicit SSL/TLS or 587 for explicit SSL/TLS
$mailman.SmtpPort = 465
$mailman.SmtpSsl = $true

# Use the recipient's certificate for encryption.
$cert = New-Object Chilkat_9_5_0.Cert
$success = $cert.LoadFromFile("c:/someDir/recipient_cert.cer")
if ($success -ne $true) {
    $($cert.LastErrorText)
    exit
}

$email = New-Object Chilkat_9_5_0.Email

$email.Subject = "This email is encrypted"
$email.Body = "This is AES-GCM encrypted mail"
$email.From = "Mary <mary@example1.com>"
$success = $email.AddTo("Joe","joe@example.com")

# Specify that AES-GCM w/ authEnvelopedData is to be used. 
# Also specify other params..
$email.Pkcs7CryptAlg = "aes-gcm"
$email.Pkcs7KeyLength = 128
$email.OaepPadding = $true
$email.OaepHash = "sha256"
$email.OaepMgfHash = "sha256"

# Indicate the email is to be sent encrypted.
$email.SendEncrypted = $true

# Specify the certificate to be used for encryption.
$success = $email.SetEncryptCert($cert)

$success = $mailman.SendEmail($email)
if ($success -ne $true) {
    $($mailman.LastErrorText)
}
else {
    $("Mail Sent!")
}