"ReferenceError: KJUR is not defined" JWT generation script

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1

when I try to generate my JWT - I get a :ReferenceError: KJUR is not defined

this is the part of my pre-req script

function generateJwt() {
	eval(pm.globals.get('jsrsasign-js')); // import javascript jsrsasign

	var sHeader = JSON.stringify(header);
	var sPayload = JSON.stringify(payload);

	var JWT = KJUR.jws.JWS.sign(header.alg, sHeader, sPayload, jwtPrivateKey);

	pm.environment.set('assertionToken', signedToken);
	console.log('jwt', signedToken);
}

var navigator = {}; // fake a navigator object for the lib
var window = {}; // fake a window object for the lib

if (pm.globals.has('jsrsasign-js')) generateJwt();
else pm.sendRequest(
	'https://kjur.github.io/jsrsasign/jsrsasign-all-min.js',
	function (err, res) {
		if (err) {
			console.log(err);
		} else {
			pm.globals.set('jsrsasign-js', res.text());
			generateJwt();
		}});

any suggestion?

2

The error seems correct.

The only mention of the KJUR variable is on this line.

var JWT = KJUR.jws.JWS.sign(header.alg, sHeader, sPayload, jwtPrivateKey);

Where is the variable defined? For that matter, where are the other variables defined. header, payload and privatekey for example.

3

and normally KJUR was not defined at all, and suddenly out of nowhere, I get this message

this is the full script

var jwtPrivateKey = `-----BEGIN PRIVATE KEY-----

-----END PRIVATE KEY-----`;

// Set headers for JWT
var header = {
	'alg': 'RS256',
	'typ': 'JWT'
};

// Prepare timestamp in seconds
var currentTimestamp = Math.floor(Date.now() / 1000);

var payload = {
    'iss': 'XXX',
    'aud': 'XXX',
    'iat': currentTimestamp,
	'exp': currentTimestamp + 60 * 5,
    'jti': 'XXX',
    'sub': 'XXX',
    'consumer_id': 'XXX',
    'channel': 'XXX',
    'scope': 'XXX',
    'amr': []
}

function generateJwt() {
	eval(pm.globals.get('jsrsasign-js')); // import javascript jsrsasign

	var sHeader = JSON.stringify(header);
	var sPayload = JSON.stringify(payload);

	var JWT = KJUR.jws.JWS.sign(header.alg, sHeader, sPayload, jwtPrivateKey);

	pm.environment.set('assertionToken', signedToken);
	console.log('jwt', signedToken);
}

var navigator = {}; // fake a navigator object for the lib
var window = {}; // fake a window object for the lib

if (pm.globals.has('jsrsasign-js')) generateJwt();
else pm.sendRequest(
	'https://kjur.github.io/jsrsasign/jsrsasign-all-min.js',
	function (err, res) {
		if (err) {
			console.log(err);
		} else {
			pm.globals.set('jsrsasign-js', res.text());
			generateJwt();
		}});
4

Why can’t you use Crypto.JS which is available in the Postman sandbox?

Here’s a public collection with examples.

Generate JWT | Postman Team Collections | Postman API Network

It includes an example using the Authorization helper which you might want to consider.