Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

Node.js Examples

Web API Categories

ASN.1
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
EBICS
ECC
Ed25519
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
GMail SMTP/IMAP/POP
Geolocation
Google APIs
Google Calendar
Google Cloud SQL
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text
HTTP

HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
MS Storage Providers
Microsoft Graph
NTLM
OAuth1
OAuth2
OIDC
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
Outlook Contact
PDF Signatures
PEM
PFX/P12
PKCS11
POP3
PRNG
REST
REST Misc
RSA
SCP
SCard
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
ScMinidriver
SharePoint
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(Node.js) Create/Verify XML Signature with External Text Reference

See more XML Digital Signatures Examples

Demonstrates how to create an XML digital signature where the referenced data is external. In this case, the data is a text file located at the following URL: https://www.chilkatsoft.com/helloWorld.txt

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-node11-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node11-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node11-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node11-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node11-linux64');
    }
} else if (os.platform() == 'darwin') {
    var chilkat = require('@chilkat/ck-node11-macosx');
}

function chilkatExample() {

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

    // This example inserts an XML signature into the following XML:

    // <?xml version="1.0" encoding="UTF-8" standalone="no"?>
    // <abc>
    //   <xyz>
    // 	<name>helloWorld.txt</name>
    // 	<url>https://www.chilkatsoft.com/helloWorld.txt</url>
    //   </xyz>
    // </abc>

    // Build the above XML to be signed.
    var xml = new chilkat.Xml();
    xml.Tag = "abc";
    xml.UpdateChildContent("xyz|name","helloWorld.txt");
    xml.UpdateChildContent("xyz|url","https://www.chilkatsoft.com/helloWorld.txt");

    var cert = new chilkat.Cert();

    var success = cert.LoadPfxFile("qa_data/pfx/test_secret.pfx","secret");
    if (success == false) {
        console.log(cert.LastErrorText);
        return;
    }

    var gen = new chilkat.XmlDSigGen();

    // Indicate the location within the XML the Signature will be inserted.
    gen.SigLocation = "abc|xyz";

    // Get the content of the text data to be referenced.
    var http = new chilkat.Http();
    var sbExternalTxt = new chilkat.StringBuilder();
    success = http.QuickGetSb("https://www.chilkatsoft.com/helloWorld.txt",sbExternalTxt);
    if (success == false) {
        console.log(http.LastErrorText);
        return;
    }

    success = gen.AddExternalTextRef("https://www.chilkatsoft.com/helloWorld.txt",sbExternalTxt,"utf-8",false,"sha256","");
    if (success == false) {
        console.log(gen.LastErrorText);
        return;
    }

    // Provide the private key for signing via the certificate, and indicate that
    // we want the base64 of the certificate embedded in the KeyInfo.
    gen.KeyInfoType = "X509Data";
    gen.X509Type = "Certificate";

    var bUsePrivateKey = true;
    success = gen.SetX509Cert(cert,bUsePrivateKey);
    if (success !== true) {
        console.log(gen.LastErrorText);
        return;
    }

    // Indicate we want an indented signature for readability.
    // This can be removed after debugging is finished..
    gen.Behaviors = "IndentedSignature";

    // Now create and insert the Signature
    var sbXml = new chilkat.StringBuilder();
    xml.GetXmlSb(sbXml);
    success = gen.CreateXmlDSigSb(sbXml);
    if (success !== true) {
        console.log(gen.LastErrorText);
        return;
    }

    // Examine the XML with the digital signature inserted
    console.log(sbXml.GetAsString());

    // Here is the output:

    // <?xml version="1.0" encoding="utf-8"?>
    // <abc>
    //     <xyz>
    //         <name>helloWorld.txt</name>
    //         <url>https://www.chilkatsoft.com/helloWorld.txt</url>
    //     <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
    //   <ds:SignedInfo>
    //     <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
    //     <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
    //     <ds:Reference URI="https://www.chilkatsoft.com/helloWorld.txt">
    //       <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
    //       <ds:DigestValue>f4OxZX/x/FO5LcGBSKHWXfwtSx+j1ncoSt3SABJtkGk=</ds:DigestValue>
    //     </ds:Reference>
    //   </ds:SignedInfo>
    //   <ds:SignatureValue>syFSl...pZDiFQ==</ds:SignatureValue>
    //   <ds:KeyInfo>
    //     <ds:X509Data>
    //       <ds:X509Certificate>MIIHAz...GwnUZWCaDE=</ds:X509Certificate>
    //     </ds:X509Data>
    //   </ds:KeyInfo>
    // </ds:Signature></xyz>
    // </abc>

    // Let's verify the signature...
    var verifier = new chilkat.XmlDSig();
    success = verifier.LoadSignatureSb(sbXml);
    if (success !== true) {
        console.log(verifier.LastErrorText);
        return;
    }

    // Let's examine the external references, and fetch the data for each..
    var sbExternalData = new chilkat.StringBuilder();
    var numRefs = verifier.NumReferences;
    var i = 0;
    while (i < numRefs) {
        var bExternal = verifier.IsReferenceExternal(i);
        if (bExternal == true) {
            var uri = verifier.ReferenceUri(i);

            // We're assuming the URI is an https:// or http:// URL...
            // Let's also assume we know that the referenced data is text and we want the utf-8 byte representation.
            sbExternalData.Clear();
            success = http.QuickGetSb(uri,sbExternalData);
            if (success == false) {
                console.log(http.LastErrorText);
                return;
            }

            success = verifier.SetRefDataSb(i,sbExternalData,"utf-8");
            if (success == false) {
                console.log(verifier.LastErrorText);
                return;
            }

        }

        i = i+1;
    }

    // Now that we have the external data available, we can verify the reference digest(s) and the signature.
    var bVerified = verifier.VerifySignature(true);
    if (bVerified !== true) {
        console.log(verifier.LastErrorText);
        return;
    }

    console.log("Signature verified!");

}

chilkatExample();

 

© 2000-2022 Chilkat Software, Inc. All Rights Reserved.