(Node.js) Verify Multiple Signatures in XML

Demonstrates how to verify multiple signatures within a single XML document.

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.

    // A sample XML file containing multiple signatures is available at:
    // https://www.chilkatsoft.com/exampleData/document.signed.bes.cs.xml

    var http = new chilkat.Http();
    var sbXml = new chilkat.StringBuilder();
    var success = http.QuickGetSb("https://www.chilkatsoft.com/exampleData/document.signed.bes.cs.xml",sbXml);
    if (success !== true) {
        console.log(http.LastErrorText);
        return;
    }

    // Load the XML containing the signature to be verified.
    var verifier = new chilkat.XmlDSig();
    success = verifier.LoadSignatureSb(sbXml);
    if (success !== true) {
        console.log(verifier.LastErrorText);
        return;
    }

    // How many Signatures exist in this XML?
    console.log("Number of XML signatures = " + verifier.NumSignatures);

    // Let's show the XML nicely indented, so we can make sense of it.
    // Loading the XML into an XML parser and re-emitting with nice formatting
    // changes whitespace that breaks the signatures.  We're only doing this
    // for the example to examine this XML, which contains 2 ds:Signature's
    // and each signature has multiple references.

    // This is what we have:
    // (scroll down to continue with this example..)

    // <?xml version="1.0" encoding="UTF-8" ?>
    // <collection Id="root">
    //     <album>
    //         <title>Questions, unanswered</title>
    //         <artist>Steve and the flubberblubs</artist>
    //         <year>1989</year>
    //         <t:tracks xmlns:t="http://test.xades4j/tracks">
    //             <t:song length="4:05" tracknumber="1">
    //                 <t:title>What do you know?</t:title>
    //                 <t:artist>Steve and the flubberblubs</t:artist>
    //                 <t:lastplayed>2006-10-17-08:31</t:lastplayed>
    //             </t:song>
    //             <t:song length="3:45" tracknumber="2">
    //                 <t:title>Who do you know?</t:title>
    //                 <t:artist>Steve and the flubberblubs</t:artist>
    //                 <t:lastplayed>2006-10-17-08:35</t:lastplayed>
    //             </t:song>
    //             <t:song length="5:14" tracknumber="3">
    //                 <t:title>When do you know?</t:title>
    //                 <t:artist>Steve and the flubberblubs</t:artist>
    //                 <t:lastplayed>2006-10-17-08:39</t:lastplayed>
    //             </t:song>
    //             <t:song length="4:19" tracknumber="4">
    //                 <t:title>Do you know?</t:title>
    //                 <t:artist>Steve and the flubberblubs</t:artist>
    //                 <t:lastplayed>2006-10-17-08:44</t:lastplayed>
    //             </t:song>
    //         </t:tracks>
    //     </album>
    //     <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad">
    //         <ds:SignedInfo>
    //             <ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />
    //             <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256" />
    //             <ds:Reference Id="xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-ref0" URI="#root">
    //                 <ds:Transforms>
    //                     <ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />
    //                 </ds:Transforms>
    //                 <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    //                 <ds:DigestValue>rD/g8soqKz8EiPUBhEWfcQacS0ta4ULHX3dKMEH6ZoQ=</ds:DigestValue>
    //             </ds:Reference>
    //             <ds:Reference Type="http://uri.etsi.org/01903#SignedProperties" URI="#xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-signedprops">
    //                 <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    //                 <ds:DigestValue>pfrrRjkGNPiRF2Bjuj3IJTGSEFYc2PDs6FCNAUJOu8E=</ds:DigestValue>
    //             </ds:Reference>
    //         </ds:SignedInfo>
    //         <ds:SignatureValue Id="xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-sigvalue">Vb/2ay4rX9cytiRCmBkgRkE4d0E05nkM412CwOHvTagCXPZZ2B2ifbmrQznTEU6Jz0dF65j5kU7C
    // bYK+9fMKB0lmqx2kUdWeBa30Rl/3ELKWKOLeDFN91zC3q4a6dtzQGwBidWex+2dO8Z69sBd2aTS6
    // S6nyGs53kTspDHfBeyg=</ds:SignatureValue>
    //         <ds:KeyInfo>
    //             <ds:X509Data>
    //                 <ds:X509Certificate>MIICbTCCAdqgAwIBAgIQpkK0uals+ItHxBlpJuypOTAJBgUrDgMCHQUAMD8xCzAJBgNVBAYTAlBU
    // MQ0wCwYDVQQKEwRJU0VMMQswCQYDVQQLEwJDQzEUMBIGA1UEAxMLSXRlcm1lZGlhdGUwHhcNMTAw
    // NjI1MTc1ODQ5WhcNMzkxMjMxMjM1OTU5WjBCMQswCQYDVQQGEwJQVDENMAsGA1UEChMESVNFTDEL
    // MAkGA1UECxMCQ0MxFzAVBgNVBAMTDkx1aXMgR29uY2FsdmVzMIGfMA0GCSqGSIb3DQEBAQUAA4GN
    // ADCBiQKBgQCpP9acMX69Dbg9ciMLFc5dm1tlpTY9OTNZ/EaCYoGVhh/3+DFgyIbEer6SA24hpREm
    // AhNG9+Ca0AurDPPgb3aKWFY9pj1WcOctis0VsR0YvzqP+2IGFqKDCd7bXFvv2tI0dEvpdc0oO6PF
    // Q02xvJG0kxQf44XljOCjUBU43jkJawIDAQABo28wbTBrBgNVHQEEZDBigBBdbbL4pDKLT56PpOpA
    // /56toTwwOjELMAkGA1UEBhMCUFQxDTALBgNVBAoTBElTRUwxCzAJBgNVBAsTAkNDMQ8wDQYDVQQD
    // EwZUZXN0Q0GCEN00x9qe7SuWQvpLK0/oay8wCQYFKw4DAh0FAAOBgQBSma8g9dQjiQo4WUljRRuG
    // yMUVRyCqW/9oRz8+0EoLNR/AhrIlGqdNbqQ1BkncgNNdqMAus5VD34v/EhgrkgWN5fZajMpYsmcR
    // Ahu4PzJ6hggAlWWMy245JwIYuV0s1Oi39GVTxVNOBIX//AONZlGWO4S2Psb1mqdZ99b/MugsaA==</ds:X509Certificate>
    //             </ds:X509Data>
    //         </ds:KeyInfo>
    //         <ds:Object>
    //             <xades:QualifyingProperties xmlns:xades="http://uri.etsi.org/01903/v1.3.2#" xmlns:xades141="http://uri.etsi.org/01903/v1.4.1#" Target="#xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad">
    //                 <xades:SignedProperties Id="xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-signedprops">
    //                     <xades:SignedSignatureProperties>
    //                         <xades:SigningCertificate>
    //                             <xades:Cert>
    //                                 <xades:CertDigest>
    //                                     <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    //                                     <ds:DigestValue>4btVb5gQ5cdcNhGpvDSWQZabPQrR9jf1x8e3YF9Ajss=</ds:DigestValue>
    //                                 </xades:CertDigest>
    //                                 <xades:IssuerSerial>
    //                                     <ds:X509IssuerName>CN=Itermediate,OU=CC,O=ISEL,C=PT</ds:X509IssuerName>
    //                                     <ds:X509SerialNumber>-119284162484605703133798696662099777223</ds:X509SerialNumber>
    //                                 </xades:IssuerSerial>
    //                             </xades:Cert>
    //                             <xades:Cert>
    //                                 <xades:CertDigest>
    //                                     <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    //                                     <ds:DigestValue>vm5QpbblsWV7fCYXotPhNTeCt4nk8cLFuF36L5RJ4Ok=</ds:DigestValue>
    //                                 </xades:CertDigest>
    //                                 <xades:IssuerSerial>
    //                                     <ds:X509IssuerName>CN=TestCA,OU=CC,O=ISEL,C=PT</ds:X509IssuerName>
    //                                     <ds:X509SerialNumber>-46248926895392336918291885380930606289</ds:X509SerialNumber>
    //                                 </xades:IssuerSerial>
    //                             </xades:Cert>
    //                             <xades:Cert>
    //                                 <xades:CertDigest>
    //                                     <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    //                                     <ds:DigestValue>AUaN+IdhKQqxIVmEOrFwq+Dn22ebTkXJqD3BoOP/x8E=</ds:DigestValue>
    //                                 </xades:CertDigest>
    //                                 <xades:IssuerSerial>
    //                                     <ds:X509IssuerName>CN=TestCA,OU=CC,O=ISEL,C=PT</ds:X509IssuerName>
    //                                     <ds:X509SerialNumber>-99704378678639105802976522062798066869</ds:X509SerialNumber>
    //                                 </xades:IssuerSerial>
    //                             </xades:Cert>
    //                         </xades:SigningCertificate>
    //                         <xades:SignerRole>
    //                             <xades:ClaimedRoles>
    //                                 <xades:ClaimedRole>CounterSignature maniac</xades:ClaimedRole>
    //                             </xades:ClaimedRoles>
    //                         </xades:SignerRole>
    //                     </xades:SignedSignatureProperties>
    //                 </xades:SignedProperties>
    //                 <xades:UnsignedProperties>
    //                     <xades:UnsignedSignatureProperties>
    //                         <xades:CounterSignature>
    //                             <ds:Signature Id="xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c" xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
    //                                 <ds:SignedInfo>
    //                                     <ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />
    //                                     <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256" />
    //                                     <ds:Reference Id="xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c-ref0" URI="#xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-sigvalue">
    //                                         <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    //                                         <ds:DigestValue>Nr5JKCScyqjKWneJw2AC6YmdU/2JZA5Pj40fkVCFbL4=</ds:DigestValue>
    //                                     </ds:Reference>
    //                                     <ds:Reference Type="http://uri.etsi.org/01903#SignedProperties" URI="#xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c-signedprops">
    //                                         <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    //                                         <ds:DigestValue>PJWDlPFdx4TJ5AXT3nIbFa2euboYGM7bpuBmol4nKSQ=</ds:DigestValue>
    //                                     </ds:Reference>
    //                                 </ds:SignedInfo>
    //                                 <ds:SignatureValue Id="xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c-sigvalue">MCcli4l5rAsGeJX2gOmoYDIAXnbszmRwOH94y7kHnpxCwGwoVrCaLSONtgKEy8mj9Ehqa/R5Dj5g
    // DgC77VkNIaRKD613JMnbsaqZ7PD0iVivLvBkasTch4PX92UEbk8EvCgzxvhlgN+L6zSLsv65sFcR
    // lFUGluMtzrqlDKvts38=</ds:SignatureValue>
    //                                 <ds:KeyInfo>
    //                                     <ds:X509Data>
    //                                         <ds:X509Certificate>MIICbTCCAdqgAwIBAgIQpkK0uals+ItHxBlpJuypOTAJBgUrDgMCHQUAMD8xCzAJBgNVBAYTAlBU
    // MQ0wCwYDVQQKEwRJU0VMMQswCQYDVQQLEwJDQzEUMBIGA1UEAxMLSXRlcm1lZGlhdGUwHhcNMTAw
    // NjI1MTc1ODQ5WhcNMzkxMjMxMjM1OTU5WjBCMQswCQYDVQQGEwJQVDENMAsGA1UEChMESVNFTDEL
    // MAkGA1UECxMCQ0MxFzAVBgNVBAMTDkx1aXMgR29uY2FsdmVzMIGfMA0GCSqGSIb3DQEBAQUAA4GN
    // ADCBiQKBgQCpP9acMX69Dbg9ciMLFc5dm1tlpTY9OTNZ/EaCYoGVhh/3+DFgyIbEer6SA24hpREm
    // AhNG9+Ca0AurDPPgb3aKWFY9pj1WcOctis0VsR0YvzqP+2IGFqKDCd7bXFvv2tI0dEvpdc0oO6PF
    // Q02xvJG0kxQf44XljOCjUBU43jkJawIDAQABo28wbTBrBgNVHQEEZDBigBBdbbL4pDKLT56PpOpA
    // /56toTwwOjELMAkGA1UEBhMCUFQxDTALBgNVBAoTBElTRUwxCzAJBgNVBAsTAkNDMQ8wDQYDVQQD
    // EwZUZXN0Q0GCEN00x9qe7SuWQvpLK0/oay8wCQYFKw4DAh0FAAOBgQBSma8g9dQjiQo4WUljRRuG
    // yMUVRyCqW/9oRz8+0EoLNR/AhrIlGqdNbqQ1BkncgNNdqMAus5VD34v/EhgrkgWN5fZajMpYsmcR
    // Ahu4PzJ6hggAlWWMy245JwIYuV0s1Oi39GVTxVNOBIX//AONZlGWO4S2Psb1mqdZ99b/MugsaA==</ds:X509Certificate>
    //                                     </ds:X509Data>
    //                                 </ds:KeyInfo>
    //                                 <ds:Object>
    //                                     <xades:QualifyingProperties Target="#xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c" xmlns:xades="http://uri.etsi.org/01903/v1.3.2#" xmlns:xades141="http://uri.etsi.org/01903/v1.4.1#">
    //                                         <xades:SignedProperties Id="xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c-signedprops">
    //                                             <xades:SignedSignatureProperties>
    //                                                 <xades:SigningTime>2012-10-13T14:26:18.783+01:00</xades:SigningTime>
    //                                                 <xades:SigningCertificate>
    //                                                     <xades:Cert>
    //                                                         <xades:CertDigest>
    //                                                             <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    //                                                             <ds:DigestValue>4btVb5gQ5cdcNhGpvDSWQZabPQrR9jf1x8e3YF9Ajss=</ds:DigestValue>
    //                                                         </xades:CertDigest>
    //                                                         <xades:IssuerSerial>
    //                                                             <ds:X509IssuerName>CN=Itermediate,OU=CC,O=ISEL,C=PT</ds:X509IssuerName>
    //                                                             <ds:X509SerialNumber>-119284162484605703133798696662099777223</ds:X509SerialNumber>
    //                                                         </xades:IssuerSerial>
    //                                                     </xades:Cert>
    //                                                     <xades:Cert>
    //                                                         <xades:CertDigest>
    //                                                             <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    //                                                             <ds:DigestValue>vm5QpbblsWV7fCYXotPhNTeCt4nk8cLFuF36L5RJ4Ok=</ds:DigestValue>
    //                                                         </xades:CertDigest>
    //                                                         <xades:IssuerSerial>
    //                                                             <ds:X509IssuerName>CN=TestCA,OU=CC,O=ISEL,C=PT</ds:X509IssuerName>
    //                                                             <ds:X509SerialNumber>-46248926895392336918291885380930606289</ds:X509SerialNumber>
    //                                                         </xades:IssuerSerial>
    //                                                     </xades:Cert>
    //                                                     <xades:Cert>
    //                                                         <xades:CertDigest>
    //                                                             <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    //                                                             <ds:DigestValue>AUaN+IdhKQqxIVmEOrFwq+Dn22ebTkXJqD3BoOP/x8E=</ds:DigestValue>
    //                                                         </xades:CertDigest>
    //                                                         <xades:IssuerSerial>
    //                                                             <ds:X509IssuerName>CN=TestCA,OU=CC,O=ISEL,C=PT</ds:X509IssuerName>
    //                                                             <ds:X509SerialNumber>-99704378678639105802976522062798066869</ds:X509SerialNumber>
    //                                                         </xades:IssuerSerial>
    //                                                     </xades:Cert>
    //                                                 </xades:SigningCertificate>
    //                                             </xades:SignedSignatureProperties>
    //                                         </xades:SignedProperties>
    //                                     </xades:QualifyingProperties>
    //                                 </ds:Object>
    //                             </ds:Signature>
    //                         </xades:CounterSignature>
    //                     </xades:UnsignedSignatureProperties>
    //                 </xades:UnsignedProperties>
    //             </xades:QualifyingProperties>
    //         </ds:Object>
    //     </ds:Signature>
    // </collection>
    // 

    // When I look at the complicated XML above, there are specific things I look at to get a handle
    // on the situation.
    // 
    // 1) Does the signature already embed the public keys required for verification?  
    //    Within each <ds:Signature>, look for the <ds:KeyInfo>.  In this case, I can see that
    //    each signature contains the full X.509 certificate needed to verify (<ds:KeyInfo><ds:X509Data><ds:X509Certificate>).
    //    This means that Chilkat will automatically use the public keys contained within the base64 certificates
    //    already present in the signature. 
    // 
    //  2) Look at each <ds:Reference> within each <ds:Signature>.  Do the URI attribute values begin with "#"?
    //     If so, then these are same-document references, and there's no need to explicitly fetch external data for reference verification.
    //     Chilkat can automatically validate each same-document Reference.
    // 
    // So it turns out that this seemingly formidable XML document is easy to verify...
    // Here we go...

    var i = 0;
    while (i < verifier.NumSignatures) {
        // The Selector property is used to set our context to the Nth signature.
        // For example, if VerifySignature is called when Selector = 0, then the 1st signature is verified.
        // If VerifySignature is called when Selector = 1, then the 2nd signature is verified, and so on.
        verifier.Selector = i;

        var verifyReferenceDigests = true;

        // The quick way to validate all references and the signature over the SignedInfo
        // is to call VerifySignature with verifyReferenceDigests equal to true.
        var verified = verifier.VerifySignature(verifyReferenceDigests);
        console.log("Signature " + (i+1) + " and all reference digests verified = " + verified);

        // We can also get information about each signature.
        // For example, we could get information about each Reference...
        // The NumReferences property returns the number of references for the Signature indicated by the Selector property.
        var numReferences = verifier.NumReferences;
        console.log("  number of references: " + numReferences);

        var j = 0;
        while (j < numReferences) {
            // Get information about the Jth reference in the Ith signature.
            console.log("  reference " + j + ":");
            // Is this a same-document or external reference?
            console.log("      is external: " + verifier.IsReferenceExternal(j));
            // For external references, the URI could be used by an application to fetch the referenced data...
            console.log("      uri: " + verifier.ReferenceUri(j));
            j = j+1;
        }

        // We could also get the KeyInfo for each Signature, which might be needed if we need to 
        // load and set a public key that is not physically present within the KeyInfo already.
        // keyInfoXml: Xml
        var keyInfoXml = verifier.GetKeyInfo();
        console.log("  key info: " + keyInfoXml.GetXml());

        i = i+1;

    }

    // Here's the output of this example:

    // Number of XML signatures = 2
    // Signature 1 and all reference digests verified = True
    //   number of references: 2
    //   reference 0:
    //       is external: False
    //       uri: #root
    //   reference 1:
    //       is external: False
    //       uri: #xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-signedprops
    //   key info: 
    // <ds:KeyInfo>
    //     <ds:X509Data>
    //         <ds:X509Certificate>
    // MIICbTCCAdqgAwIBAgIQpkK0uals+ItHxBlpJuypOTAJBgUrDgMCHQUAMD8xCzAJBgNVBAYTAlBU
    // MQ0wCwYDVQQKEwRJU0VMMQswCQYDVQQLEwJDQzEUMBIGA1UEAxMLSXRlcm1lZGlhdGUwHhcNMTAw
    // NjI1MTc1ODQ5WhcNMzkxMjMxMjM1OTU5WjBCMQswCQYDVQQGEwJQVDENMAsGA1UEChMESVNFTDEL
    // MAkGA1UECxMCQ0MxFzAVBgNVBAMTDkx1aXMgR29uY2FsdmVzMIGfMA0GCSqGSIb3DQEBAQUAA4GN
    // ADCBiQKBgQCpP9acMX69Dbg9ciMLFc5dm1tlpTY9OTNZ/EaCYoGVhh/3+DFgyIbEer6SA24hpREm
    // AhNG9+Ca0AurDPPgb3aKWFY9pj1WcOctis0VsR0YvzqP+2IGFqKDCd7bXFvv2tI0dEvpdc0oO6PF
    // Q02xvJG0kxQf44XljOCjUBU43jkJawIDAQABo28wbTBrBgNVHQEEZDBigBBdbbL4pDKLT56PpOpA
    // /56toTwwOjELMAkGA1UEBhMCUFQxDTALBgNVBAoTBElTRUwxCzAJBgNVBAsTAkNDMQ8wDQYDVQQD
    // EwZUZXN0Q0GCEN00x9qe7SuWQvpLK0/oay8wCQYFKw4DAh0FAAOBgQBSma8g9dQjiQo4WUljRRuG
    // yMUVRyCqW/9oRz8+0EoLNR/AhrIlGqdNbqQ1BkncgNNdqMAus5VD34v/EhgrkgWN5fZajMpYsmcR
    // Ahu4PzJ6hggAlWWMy245JwIYuV0s1Oi39GVTxVNOBIX//AONZlGWO4S2Psb1mqdZ99b/MugsaA==
    // </ds:X509Certificate>
    //     </ds:X509Data>
    // </ds:KeyInfo>
    // 
    // Signature 2 and all reference digests verified = True
    //   number of references: 2
    //   reference 0:
    //       is external: False
    //       uri: #xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-sigvalue
    //   reference 1:
    //       is external: False
    //       uri: #xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c-signedprops
    //   key info: 
    // <ds:KeyInfo>
    //     <ds:X509Data>
    //         <ds:X509Certificate>
    // MIICbTCCAdqgAwIBAgIQpkK0uals+ItHxBlpJuypOTAJBgUrDgMCHQUAMD8xCzAJBgNVBAYTAlBU
    // MQ0wCwYDVQQKEwRJU0VMMQswCQYDVQQLEwJDQzEUMBIGA1UEAxMLSXRlcm1lZGlhdGUwHhcNMTAw
    // NjI1MTc1ODQ5WhcNMzkxMjMxMjM1OTU5WjBCMQswCQYDVQQGEwJQVDENMAsGA1UEChMESVNFTDEL
    // MAkGA1UECxMCQ0MxFzAVBgNVBAMTDkx1aXMgR29uY2FsdmVzMIGfMA0GCSqGSIb3DQEBAQUAA4GN
    // ADCBiQKBgQCpP9acMX69Dbg9ciMLFc5dm1tlpTY9OTNZ/EaCYoGVhh/3+DFgyIbEer6SA24hpREm
    // AhNG9+Ca0AurDPPgb3aKWFY9pj1WcOctis0VsR0YvzqP+2IGFqKDCd7bXFvv2tI0dEvpdc0oO6PF
    // Q02xvJG0kxQf44XljOCjUBU43jkJawIDAQABo28wbTBrBgNVHQEEZDBigBBdbbL4pDKLT56PpOpA
    // /56toTwwOjELMAkGA1UEBhMCUFQxDTALBgNVBAoTBElTRUwxCzAJBgNVBAsTAkNDMQ8wDQYDVQQD
    // EwZUZXN0Q0GCEN00x9qe7SuWQvpLK0/oay8wCQYFKw4DAh0FAAOBgQBSma8g9dQjiQo4WUljRRuG
    // yMUVRyCqW/9oRz8+0EoLNR/AhrIlGqdNbqQ1BkncgNNdqMAus5VD34v/EhgrkgWN5fZajMpYsmcR
    // Ahu4PzJ6hggAlWWMy245JwIYuV0s1Oi39GVTxVNOBIX//AONZlGWO4S2Psb1mqdZ99b/MugsaA==
    // </ds:X509Certificate>
    //     </ds:X509Data>
    // </ds:KeyInfo>
    // 
    // 

}

chilkatExample();