PHP

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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<?php

use Chilkat2\MailMan;

$success = false;

// 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.

$mailman = new MailMan();

// Configure the SMTP server connection.
$mailman->SmtpHost = 'smtp.example.com';
$mailman->SmtpPort = 465;
$mailman->SmtpSsl = true;
$mailman->SmtpUsername = 'user@example.com';
$mailman->SmtpPassword = 'myPassword';

// Load the client certificate from a PEM file.
try {
    $mailman->SetSslClientCertPem('qa_data/certs/client.pem', 'pem_password');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

$success = $mailman->VerifySmtpLogin();
if (!$success) {
    echo $mailman->LastErrorText, "\n";
    exit;
}

echo "Connected using a PEM TLS client certificate.\n";

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