Load DER encoded X.509 Certificate (.cer, .crt)

Loads a digital certificate from a binary DER encoded X.509 Certificate (.cer, .crt) and fetches information about the cert.

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

use chilkat();

$cert = new chilkat::CkCert();

#  LoadFromFile will load virtually any certificate format file.
#  It will auto-recognize the format and load appropiately.
$success = $cert->LoadFromFile("/Users/chilkat/testData/cer/chilkat_ssl.cer");
if ($success != 1) {
    print $cert->lastErrorText() . "\r\n";
    exit;
}

#  DN = "Distinguished Name"
print "SubjectDN:" . $cert->subjectDN() . "\r\n";

print "Common Name:" . $cert->subjectCN() . "\r\n";
print "Issuer Common Name:" . $cert->issuerCN() . "\r\n";

print "Serial Number:" . $cert->serialNumber() . "\r\n";