Error on using 'crypto' functions inside browserified NodeJS module

[alexgo84]

I am trying to generate an hmac from my payload and key. The following NodeJS code does this successfully:

var crypto = require('crypto')

function generateSignature(applicationKey, payload) {
    if (payload === undefined) {
        return ""
    }
    var strPayload = JSON.stringify(payload)
    var buffPayload = new Buffer(strPayload)

    var buffKey = new Buffer(applicationKey, 'hex')

    var hmac = crypto.createHmac('md5', buffKey);
    hmac.write(buffPayload);
    hmac.end()
    var signature = hmac.read().toString('hex')
    return signature
}

exports.generateSignature = generateSignature

In order to use this in my load test, I browserify this NodeJS file with:

browserify b.js --standalone sign > sign.js

Then, in my test I would require the browserified module:
var sign = require('./sign.js')
And call:

    var signature = sign.generateSignature(appKey, customerUpdatePayload)

However, when I run the JS file with k6, I get the following error:

TypeError: Value is not an object: undefined

referring to the browserified sign.js file.

This seems like a fairly common use case and I was wondering if I'm doing something wrong here?

Any advice would be very welcome. Thank you!

[mstoykov]

importing nodejs "crypto" is not possible. Maybe in the future we will decide that instead of "k6/crypto" being a totally new implementation we are going to reimplement "crypto" from nodejs ... but this won't happen soon IMO.

If someone needs HMAC, k6 does support it I have even build awsv4 signing based on it.

I am closing this as I don't know what else could be done for this issue