How do create a Hex encoded HmacSHA256 secure hash in JS?

Question

I have a project with the following Java Code that works...

static String generateHashKey (String apiKey, String msg) throws GeneralSecurityException{

    Mac hmacSha256 = Mac.getInstance("HmacSHA256");
    SecretKeySpec secretKey = new SecretKeySpec(apiKey.getBytes(), "HmacSHA256");
    hmacSha256.init(secretKey);
    byte[] bytes = hmacSha256.doFinal(msg.getBytes());

    return Hex.encodeHexString(bytes).replace("-","");
}

I am trying to replace this with a js function like...

import crypto from "crypto";
...
const eMessage = crypto.createHmac("SHA256", apiKey).update(message).digest("base64");

But it looks to be producing different hashes. How do I ensure the same hash for both? What am I missing?

UPDATE

Per the comment and link I tried

import crypto from "crypto";
import fs from "fs";
import moment from "moment";
import axios from "axios";
import hmacSHA256 from 'crypto-js/hmac-sha256';
import sha256 from 'crypto-js/sha256';
import Base64 from 'crypto-js/enc-base64';
....
const eMessage = Base64.stringify(hmacSHA256(message, key));
const eMessage2 = crypto.createHmac("SHA256", key).update(message).digest("base64");
console.log(eMessage)
console.log(eMessage2)

Both of the JS libs return the same (Which is good) but it doesn't match the Java which is bad.

Potentially: jokecamp.com/blog/…

slim
– slim

2019-06-21 13:55:09 +00:00
Commented Jun 21, 2019 at 13:55 — slim
– slim, Commented Jun 21, 2019 at 13:55
Thanks added update

JGleason
– JGleason

2019-06-21 14:08:04 +00:00
Commented Jun 21, 2019 at 14:08 — JGleason
– JGleason, Commented Jun 21, 2019 at 14:08

Estevanbs · Accepted Answer · 2022-03-11 01:37:15Z

2

I was able to use this on node.js:

const crypto = require('crypto')
const signature = crypto
    .createHmac('sha256', key)
    .update(message)
    .digest('hex')
console.log('Signature:', signature)

edited Mar 11, 2022 at 1:37

Estevanbs

1623 silver badges15 bronze badges

answered Dec 19, 2020 at 3:51

fagiani

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Comments

JGleason · Accepted Answer · 2019-06-21 14:59:08Z

0

So the problem I was having was that it was not in base64 and was instead in Hex...

import hmacSHA256 from 'crypto-js/hmac-sha256';
import sha256 from 'crypto-js/sha256';
import Hex from 'crypto-js/enc-hex'
const bytes = hmacSHA256(message, key);
const eMessage = bytes.toString(Hex);

answered Jun 21, 2019 at 14:59

JGleason

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