JavaScript

Sign a JWS with an HMAC Key from BinData

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetMacKeyBd, which sets the symmetric MAC key for a signature from the raw bytes in a BinData.

Background. This is the in-memory equivalent of SetMacKey, for when the key material is already available as bytes.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

var success = false;

var jws = new CkJws();

//  Protected header specifying HMAC-SHA256.
var header = new CkJsonObject();
header.UpdateString("alg","HS256");
success = jws.SetProtectedHeader(0,header);
if (success == false) {
    console.log(jws.LastErrorText);
    return;
}

var bIncludeBom = false;
success = jws.SetPayload("This is the content to sign.","utf-8",bIncludeBom);
if (success == false) {
    console.log(jws.LastErrorText);
    return;
}

//  Set the symmetric MAC key for signature 0 from the raw bytes in a BinData.  In production, obtain
//  the key material from a secure source.
var bdKey = new CkBinData();
bdKey.AppendEncoded("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=","base64");
success = jws.SetMacKeyBd(0,bdKey);
if (success == false) {
    console.log(jws.LastErrorText);
    return;
}

var jwsCompact = jws.CreateJws();
if (jws.LastMethodSuccess == false) {
    console.log(jws.LastErrorText);
    return;
}

console.log(jwsCompact);