(Perl) DKIM Signature using Windows Current User Certificate Store

This is a Windows-specific example to load a certificate from the Current User (registry-based) certificate store, and then use the certificate's associated private key for a DKIM signature.

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.

$cert = chilkat::CkCert->new();

# The LoadByCommonName method searches the Windows Local Machine and Current User 
# registry-based certificate stores for a certificate having the common name specified. 
# If found, the certificate is loaded and ready for use.
$success = $cert->LoadByCommonName("My Certificate ABC");
if ($success != 1) {
    print $cert->lastErrorText() . "\r\n";
    exit;
}

# The certificate must have an associated private key installed, and it must be a
# private key that has been marked "exportable" when it was originally installed.
if (!$cert->HasPrivateKey()) {
    print "This certificate does not have a private key available." . "\r\n";
    exit;
}

# privKey is a PrivateKey
$privKey = $cert->ExportPrivateKey();
if ($cert->get_LastMethodSuccess() == 0) {
    print $cert->lastErrorText() . "\r\n";
    exit;
}

$dkim = chilkat::CkDkim->new();

# Load the private key into the DKIM object:
$success = $dkim->LoadDkimPk($privKey->getPkcs8Pem(),"");
if ($success != 1) {
    print $dkim->lastErrorText() . "\r\n";
    exit;
}

# The private key has been loaded into the DKIM object.  See the other DKIM
# examples for guidance on how to create a DKIM signature...