Check if Certificate Expired

How to check to see if a digital certificate is expired.

 Chilkat Perl Module Downloads for Windows, Linux, and MAC OS X

use chilkat();

$cert = new chilkat::CkCert();

#  The LoadByCommonName method searches the registry-based
#  Windows Current User Certificate Store and Local Machine Certificate
#  Store for a certificate whose common name (CN) matches
#  the argument:

$success = $cert->LoadByCommonName("Chilkat Software, Inc.");
if ($success == 0) {
    print "Failed to find certificate!" . "\n";
}
else {

    #  Display the certificate's distinguished name:
    print $cert->subjectDN() . "\r\n";

    $isExpired = $cert->get_Expired();
    if ($isExpired == 1) {
        print "Certificate is expired." . "\r\n";
    }
    else {
        print "Certificate is NOT expired." . "\r\n";
    }

}

#  Alternatively, load a Certificate from a .cer file.
#  (Certs may also be loaded from other types of files, such as PEM, DER, PFX, etc.)
$success = $cert->LoadFromFile("myCert.cer");
if ($success == 0) {
    print "Failed to load certificate!" . "\n";
}
else {

    #  Display the certificate's distinguished name:
    print $cert->subjectDN() . "\r\n";

    $isExpired = $cert->get_Expired();
    if ($isExpired == 1) {
        print "Certificate is expired." . "\r\n";
    }
    else {
        print "Certificate is NOT expired." . "\r\n";
    }

}

#  The Chilkat Certificate, Certificate Store, Private Key,
#  Public Key, and Key Container classes / objects are freeware.

#  They are used by and included with the Chilkat Email,
#  Crypt, S/MIME, and other commercial Chilkat components.