Ruby

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.

Ruby

require 'chilkat'

success = false

# 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 = Chilkat::CkMailMan.new()

mailman.put_SmtpHost("smtp.example.com")

mailman.put_SmtpUsername("my_smtp_login")
mailman.put_SmtpPassword("my_smtp_password")

# The typical SMTP ports are 465 for implicit SSL/TLS or 587 for explicit SSL/TLS
mailman.put_SmtpPort(465)
mailman.put_SmtpSsl(true)

# Use the recipient's certificate for encryption.
cert = Chilkat::CkCert.new()
success = cert.LoadFromFile("c:/someDir/recipient_cert.cer")
if (success != true)
    print cert.lastErrorText() + "\n";
    exit
end

email = Chilkat::CkEmail.new()

email.put_Subject("This email is encrypted")
email.put_Body("This is AES-GCM encrypted mail")
email.put_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.put_Pkcs7CryptAlg("aes-gcm")
email.put_Pkcs7KeyLength(128)
email.put_OaepPadding(true)
email.put_OaepHash("sha256")
email.put_OaepMgfHash("sha256")

# Indicate the email is to be sent encrypted.
email.put_SendEncrypted(true)

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

success = mailman.SendEmail(email)
if (success != true)
    print mailman.lastErrorText() + "\n";
else
    print "Mail Sent!" + "\n";
end