(Node.js) Load .crl, Convert to XML, Get Revoked Serial Numbers and Dates

Load a binary .crl file (Certificate Revocation List), converts to XML, and then gets the revoked certificate serial numbers and revocation dates.

Note: This example requires Chilkat v9.5.0.77 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() {

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // Load a binary .crl file.
    var bdCrl = new chilkat.BinData();
    var success = bdCrl.LoadFile("qa_data/crl/ca1.crl");
    if (success !== true) {
        console.log("Failed to load CRL file.");
        return;
    }

    var asn = new chilkat.Asn();
    success = asn.LoadBd(bdCrl);
    if (success !== true) {
        console.log(asn.LastErrorText);
        return;
    }

    // Convert ASN.1 to XML and load into xml and re-emit for pretty printing..
    var xml = new chilkat.Xml();
    xml.LoadXml(asn.AsnToXml());
    success = xml.SaveXml("qa_output/crl.xml");

    // Use this online tool to generate parsing code from CRL XML: 
    // Generate Parsing Code from XML

    // Here's code to parse the XML.  This code was generated by the above tool,
    // and then we modified it by removing unneeded code and changing some names
    var i;
    var count_i;
    var tagPath;
    var j;
    var count_j;
    var k;
    var count_k;

    var revokedCertSerialHex;
    var dateRevoked;

    var dt = new chilkat.CkDateTime();

    i = 0;
    count_i = xml.NumChildrenHavingTag("sequence");
    while (i < count_i) {
        xml.I = i;

        j = 0;
        count_j = xml.NumChildrenHavingTag("sequence[i]|sequence");
        while (j < count_j) {
            xml.J = j;

            k = 0;
            count_k = xml.NumChildrenHavingTag("sequence[i]|sequence[j]|sequence");
            while (k < count_k) {
                xml.K = k;

                // Get the revoked certificate's serial number in uppercase hex.
                revokedCertSerialHex = xml.GetChildContent("sequence[i]|sequence[j]|sequence[k]|int");
                console.log("serial number: " + revokedCertSerialHex);

                // Get the date/time revoked.  It will be a string formatted as "YYMMDDhhmmssZ", such as "181023093028Z"
                dateRevoked = xml.GetChildContent("sequence[i]|sequence[j]|sequence[k]|utctime");

                // Starting in Chilkat v9.5.0.77, date/time strings formatted as YYMMDDhhmmssZ can be parsed as follows:
                dt.SetFromTimestamp(dateRevoked);
                console.log("date revoked: " + dt.GetAsRfc822(false));

                k = k+1;
            }

            j = j+1;
        }

        i = i+1;
    }


}

chilkatExample();