(Perl) POP3 Verify Signed (S/MIME) Email

Demonstrates how to download and verify digitally signed S/MIME email.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux

use chilkat();

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$mailman = chilkat::CkMailMan->new();

# Set the POP3 server's hostname
$mailman->put_MailHost("pop.someMailServer.com");

# Set the POP3 login/password.
$mailman->put_PopUsername("myLogin");
$mailman->put_PopPassword("myPassword");

# sa is a StringArray
$sa = $mailman->GetUidls();
if ($mailman->get_LastMethodSuccess() == 0) {
    print $mailman->lastErrorText() . "\r\n";
    exit;
}

$i = 0;
while ($i < $sa->get_Count()) {

    $uidl = $sa->getString($i);

    # email is a Email
    $email = $mailman->FetchEmail($uidl);
    if ($mailman->get_LastMethodSuccess() == 0) {
        print $mailman->lastErrorText() . "\r\n";

        exit;
    }

    print $email->ck_from() . "\r\n";
    print $email->subject() . "\r\n";

    # The security layers of signed and/or encrypted emails
    # are automatically "unwrapped" when loaded into
    # a Chilkat email object.
    # An application only needs to check to see if an email
    # was received signed or encrypted, and then examine
    # the success/failure.  For example:
    if ($email->get_ReceivedSigned() == 1) {

        print "This email was signed." . "\r\n";

        # Check to see if the signatures were verified.
        if ($email->get_SignaturesValid() == 1) {
            print "Digital signature(s) verified." . "\r\n";
            print "Signer: " . $email->signedBy() . "\r\n";

            # The certificate used for signing may be obtained
            # by calling email.GetSignedByCert.

            # cert is a Cert
            $cert = $email->GetSignedByCert();
            if ($email->get_LastMethodSuccess() == 0) {
                print "Failed to get signing certificate object." . "\r\n";
            }
            else {
                print "Signing cert: " . $cert->subjectCN() . "\r\n";

            }

        }
        else {
            print "Digital signature verification failed." . "\r\n";
        }

    }

    $i = $i + 1;
}

$mailman->Pop3EndSession();