(Node.js) Get Certificate CRL Distribution Points

Demonstrates how to get a certificate's CRL Distribution Points extension data (assuming it exists). In the vast majority of cases, there will be one CRL Distribution Point.

Note: This example requires Chilkat v9.5.0.76 or greater.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    var cert = new chilkat.Cert();

    var success = cert.LoadFromFile("qa_data/certs/test_haswdt.cer");
    if (success !== true) {
        console.log(cert.LastErrorText);
        return;
    }

    // Get the CRL Distribution Points extension, which is at OID 2.5.29.31
    var extensionXmlStr = cert.GetExtensionAsXml("2.5.29.31");
    if (cert.LastMethodSuccess == false) {
        console.log("Certificate does not have the CDP extension.");
        return;
    }

    var xml = new chilkat.Xml();
    xml.LoadXml(extensionXmlStr);

    // See what we have..
    console.log(xml.GetXml());

    // We should get XML like this:

    // <?xml version="1.0" encoding="utf-8" ?>
    // <sequence>
    //     <sequence>
    //         <contextSpecific tag="0" constructed="1">
    //             <contextSpecific tag="0" constructed="1">
    //                 <contextSpecific tag="6" constructed="0">aHR0cDovL2NybC5jb21vZG9jYS5jb20vQ09NT0RPUlNBQ2xpZW50QXV0aGVudGljYXRpb25hbmRTZWN1
    // cmVFbWFpbENBLmNybA==</contextSpecific>
    //             </contextSpecific>
    //         </contextSpecific>
    //     </sequence>
    // </sequence>
    // 

    // Assuming there is one CRL Distribution Point...
    var sbDistPoint = new chilkat.StringBuilder();
    success = xml.GetChildContentSb("sequence|contextSpecific|contextSpecific|contextSpecific",sbDistPoint);
    if (success == true) {
        sbDistPoint.Decode("base64","utf-8");
        console.log("CRL Distribution Point:  " + sbDistPoint.GetAsString());
    }

    // Sample output:
    // CRL Distribution Point:  http://crl.comodoca.com/COMODORSAClientAuthenticationandSecureEmailCA.crl

}

chilkatExample();