Create Encrypted EML

Downloads for Windows/Linux and Install Instructions

Ruby script to create a encrypted email (EML file). (An EML file contains the MIME source of an email and is the default email file format saved by most email programs such as Outlook Express and Mozilla Thunderbird.)

# file: CreateEncryptedEml.rb

require 'rubygems'
require 'chilkat'

# How to create an encrypted EML (email) file in Ruby using the Chilkat email module.
mailman = Chilkat::CkMailMan.new()
mailman.UnlockComponent("anything for 30-day trial")

# Create a simple email
email = Chilkat::CkEmail.new()
email.put_Subject("Encrypted email in Ruby")
email.put_Body("Encrypted email in Ruby")
email.put_From("Chilkat Support <support@chilkatsoft.com>")

# Add a single recipient
# It is the digital certificate of the recipient that is used to encrypt.
email.AddTo("John","john@example.com")

# There are a number of ways to send digitally encrypted email using Chilkat.
# This example demonstrates the easiest (other examples will explore
# some of the other possibilities).
# To send an encrypted email, you will first need the digital certificate
# for the recipient. The email address in the certificate should match
# the recipient's email address.  You do not need the private key to send
# encrypted email: only the public-key is required.  The recipient however,
# must have his/her certificate installed with private key in order to decrypt.
# 
# If you have the digital certificate in a .cer file, double-click on it from
# Windows Explorer and install the certificate in the default location.  
# Chilkat should now be able to locate it.  You only need to set the SendEncrypted
# property = true to send encrypted email.  
#
# That's it.  When RenderToMime is called, it will locate the certificate matching
# the recipient's email address, encrypt the email (including all attachments) and 
# send it.
email.put_SendEncrypted(true)

mimeStr = Chilkat::CkString.new()
# The RenderToMime method renders the email according to the property settings
# of the email and mailman objects.
success = mailman.RenderToMime(email,mimeStr)
if not success
	mailman.SaveLastError("lastError.xml")
else
	# Convert line endings from CRLF to bare LF's
	mimeStr.toLF()
	# Save the MIME string to a file.
	aFile = File.new("encrypted_email.eml", "w")
	aFile.write(mimeStr.getString())
	aFile.close
end