Perl

Set a TLS Client Certificate for IMAP

Demonstrates the Chilkat Imap.SetSslClientCert method, which supplies a client certificate for TLS client-certificate authentication. The only argument is a Cert object that must provide access to its private key. Call it before connecting. This example loads the certificate from a PFX file.

Note: The certificate path is relative to the application's current working directory. Supply the path to your own certificate file.

Background: Most IMAP servers authenticate with a username and password only. A few high-security deployments additionally require mutual TLS, where the client presents its own certificate during the handshake. Because that happens as part of connecting, the certificate must be set before Connect — setting it afterward has no effect on the already-established connection.

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Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# Demonstrates the Imap.SetSslClientCert method, which supplies a client certificate for TLS
# client-certificate authentication.  The only argument is a Cert object.  It must be called
# before connecting.

my $imap = Chilkat2::Imap->new;

$imap->Ssl(1);
$imap->Port(993);

# The PFX password is not hard-coded in source.  Insert code here to obtain it from an
# interactive prompt, environment variable, or a secrets vault.
my $pfxPassword = '';

# Load the client certificate (and its private key) from a PFX file.
my $cert = Chilkat2::Cert->new;
my $success = $cert->LoadPfxFile('qa_data/client.pfx', $pfxPassword);
if (!$success) {
    print $cert->LastErrorText, "\n";
    exit;
}

# Provide the client certificate BEFORE connecting.
$success = $imap->SetSslClientCert($cert);
if (!$success) {
    print $imap->LastErrorText, "\n";
    exit;
}

$success = $imap->Connect('imap.example.com');
if (!$success) {
    print $imap->LastErrorText, "\n";
    exit;
}

$success = $imap->Login('user@example.com', 'myPassword');
if (!$success) {
    print $imap->LastErrorText, "\n";
    exit;
}

$success = $imap->Disconnect();
if (!$success) {
    print $imap->LastErrorText, "\n";
    exit;
}