(Ruby) Send Encrypted Email to Multiple Recipients

Demonstrates how to create and send an S/MIME encrypted email to multiple recipients. The digital certificate of each recipient is required. The encrypting/sending process uses each recipient's digital certificate (which internally contains the public key). Each recipient decrypts the received email using his/her private key.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# 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()

# Set the SMTP server.
mailman.put_SmtpHost("smtp.mymailserver.com")

# Load each recipient's certificate into a Chilkat certificate object.
# This example loads the certificates from files.  However, the Chilkat
# certificate object provides other means for loading certificates,
# such as from in-memory PEM strings, or in-memory binary DER encoded form, etc.
cert1 = Chilkat::CkCert.new()
success = cert1.LoadFromFile("recipient1.cer")
if (success != true)
    print cert1.lastErrorText() + "\n";
    exit
end

cert2 = Chilkat::CkCert.new()
success = cert2.LoadFromFile("recipient2.cer")
if (success != true)
    print cert2.lastErrorText() + "\n";
    exit
end

cert3 = Chilkat::CkCert.new()
success = cert3.LoadFromFile("recipient3.cer")
if (success != true)
    print cert3.lastErrorText() + "\n";
    exit
end

# Create a new email object
email = Chilkat::CkEmail.new()

email.put_Subject("This email is encrypted and sent to 3 recipients")
email.put_Body("This is an S/MIME encrypted mail sent to 3 recipients")
email.put_From("Chilkat Support <support@chilkatsoft.com>")

# Make each of the certificates available for encrypting the email
# by calling AddEncryptCert for each.
success = email.AddEncryptCert(cert1)
if (success == true)
    success = email.AddEncryptCert(cert2)
end

if (success == true)
    success = email.AddEncryptCert(cert3)
end

if (success != true)
    print email.lastErrorText() + "\n";
    exit
end

# Add 3 recipients to the email (2 TO addresses, and 1 CC address)
success = email.AddTo("Recipient 1","admin@cknotes.com")
success = email.AddTo("Recipient 2","somebody001122@yahoo.com")
success = email.AddCC("Recipient 3","somebody123xyz@gmail.com")

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

# Send the encrypted email...
success = mailman.SendEmail(email)
if (success != true)
    print mailman.lastErrorText() + "\n";
else
    print "Encrypted Email Sent!" + "\n";
end