Lua

Use a PEM TLS Client Certificate

Demonstrates the Chilkat MailMan.SetSslClientCertPem method, which sets the client-side certificate for SSL/TLS connections, loading it from PEM data or from a PEM file. The first argument may contain the PEM text itself or a path to a PEM file; the second is the PEM password. This example loads the client certificate from a PEM file.

Background: PEM is the familiar Base64 text format bracketed by -----BEGIN CERTIFICATE----- lines, and a single PEM can hold both a certificate and its (optionally encrypted) private key. It is the common format in Unix/OpenSSL environments, whereas PFX is more typical on Windows. Because this method accepts either the PEM text or a filename, you can supply credentials straight from a config value or secret store without writing them to disk.

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Lua

local chilkat = require("chilkat")

-- Demonstrates the MailMan.SetSslClientCertPem method, which sets the client-side
-- certificate for SSL/TLS connections, loading it from PEM data or from a PEM file.  The
-- 1st argument may contain PEM text or a PEM file path; the 2nd is the PEM password.

local mailman = chilkat.MailMan.new()

-- Configure the SMTP server connection.
mailman.smtp_host = "smtp.example.com"
mailman.smtp_port = 465
mailman.smtp_ssl = true
mailman.smtp_username = "user@example.com"
mailman.smtp_password = "myPassword"

-- Load the client certificate from a PEM file.
local success = mailman:set_ssl_client_cert_pem("qa_data/certs/client.pem", "pem_password")
if not success then
    print(mailman.last_error_text)
    return
end

success = mailman:verify_smtp_login()
if not success then
    print(mailman.last_error_text)
    return
end

print("Connected using a PEM TLS client certificate.")

-- Note: The path "qa_data/certs/client.pem" is a relative local filesystem path,
-- relative to the current working directory of the running application.