Node.js

Get Certificates within XML Signature

See more XML Digital Signatures Examples

Demonstrates how to get the certificates contained within an XML signature. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var sbXml = new chilkat.StringBuilder();

    // Load XML containing one or more signatures.
    success = sbXml.LoadFile("qa_data/xml_dsig_valid_samples/multipleSigners/sp.pdf.XAdES.xml","utf-8");
    if (success == false) {
        console.log("Failed to load the XML file..");
        return;
    }

    var dsig = new chilkat.XmlDSig();

    // First load the XML containing the signatures to be verified.
    // Note that this particular Signature already contains the RSA public key that will be used
    // for verification.
    success = dsig.LoadSignatureSb(sbXml);
    if (success !== true) {
        console.log(dsig.LastErrorText);
        return;
    }

    // For each signature, verify and also get the certificate(s) contained within each Signature.
    var i = 0;
    var saCerts = new chilkat.StringArray();
    var cert = new chilkat.Cert();

    console.log("numSignatures = " + dsig.NumSignatures);

    while (i < dsig.NumSignatures) {
        // Select the Nth signature by setting the Selector property.
        dsig.Selector = i;

        var bVerifyReferenceDigests = true;
        var bVerified = dsig.VerifySignature(bVerifyReferenceDigests);
        console.log("Signature " + (i+1) + " verified = " + bVerified);

        // Get the certificates embedded in this signature.
        saCerts.Clear();
        success = dsig.GetCerts(saCerts);
        if (success == true) {
            var j = 0;
            while (j < saCerts.Count) {
                success = cert.LoadFromBase64(saCerts.GetString(j));
                if (success == true) {
                    console.log("    " + cert.SubjectDN);
                }

                j = j+1;
            }

        }

        i = i+1;
    }


}

chilkatExample();