(PHP Extension) Get Text Certificate Extensions by OID

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Demonstrates how to get text certificate extensions by OID. In this example, we have a certificate with the following OID extensions: 1.3.6.1.4.1.49952.5.8.5, 1.3.6.1.4.1.49952.5.8.6, 1.3.6.1.4.1.49952.5.8.7.

Most certificate extensions have values that are ASN.1 (binary). For the majority of cases, an application should call GetExtensionAsXml. For extensions known to have text values (such as the OIDs listed above), an application can instead call GetExtensionAsText.

The GetExtensionAsText method is added in Chilkat v9.5.0.89.

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<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

$cert = new CkCert();

$success = $cert->LoadFromFile('qa_data/certs/PUH9.cer');
if ($success == false) {
    print $cert->lastErrorText() . "\n";
    exit;
}

$oid = '1.3.6.1.4.1.49952.5.8.5';
$str = $cert->getExtensionAsText($oid);
if ($cert->get_LastMethodSuccess() == true) {
    print $oid . ': ' . $str . "\n";
}

$oid = '1.3.6.1.4.1.49952.5.8.6';
$str = $cert->getExtensionAsText($oid);
if ($cert->get_LastMethodSuccess() == true) {
    print $oid . ': ' . $str . "\n";
}

$oid = '1.3.6.1.4.1.49952.5.8.7';
$str = $cert->getExtensionAsText($oid);
if ($cert->get_LastMethodSuccess() == true) {
    print $oid . ': ' . $str . "\n";
}


?>