Lua

Send Signed Email using PFX File

Demonstrates how to send a signed email using a digital certificate w/ private key stored in a PFX file. Lua

local chilkat = 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.
local mailman = chilkat.MailMan.new()

-- Set the SMTP server.
mailman.smtp_host = "smtp.mymailserver.com"

-- Create a new email object
local email = chilkat.Email.new()

email.subject = "This email is signed"
email.body = "This is a digitally signed mail"
email.from = "Chilkat Admin <admin@chilkatsoft.com>"
local success = email:add_to("Chilkat Support", "support@chilkatsoft.com")

-- Indicate that the email should be sent signed.
email.send_signed = true

-- Tell the mailman to use a PFX file as a source for locating
-- the certificate and private key required for signing.
-- The certificate chosen for signing will be the one that
-- matches the sender's email address, which also has
-- a private key.  All intermediate certs in the chain of
-- authentication, up to and including the root, will
-- be included in the signature.
success = mailman:add_pfx_source_file("/pfx_files/chilkatsoft_secret.pfx", "secret")
if not success then
    print(mailman.last_error_text)
    return
end

-- Signed email can be sent in two different ways.
-- In a multipart/signed email, the signature is attached as a separate MIME part.
-- In an opaque email (signedData) the content of the email is encapsulated within the signature
-- and the email is sent as "application/pkcs7-mime".
-- Either should be fine, but some receiving systems might require one or the other..
mailman.opaque_signing = false

-- Send a signed email.
success = mailman:send_email(email)
if not success then
    print(mailman.last_error_text)
else
    -- The LastErrorText property provides information
    -- even when successful.
    print(mailman.last_error_text)
    print("Mail Sent!")
end