Node.js

Get Certificate CRL Distribution Points

See more Certificates Examples

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.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    var cert = new chilkat.Cert();

    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();