Node.js Hmac SHA256 base64 of string

Question

I'm making an app in java and a server with node and as an authentication method I would like to compare two strings.

In java i'm doing this:

try {     String secret = "secret";     String message = "Message";      Mac sha256_HMAC = Mac.getInstance("HmacSHA256");     SecretKeySpec secret_key = new SecretKeySpec(secret.getBytes(), "HmacSHA256");     sha256_HMAC.init(secret_key);      String hash = Base64.encodeBase64String(sha256_HMAC.doFinal(message.getBytes()));     System.out.println(hash); } catch (Exception e){     System.out.println("Error"); } 

But I'm still pretty new to node.js and I'm trying to figure out how to do the same there. This is what I've got:

var crypto = require('crypto'); var sha256 = crypto.createHash('HMAC-SHA256').update('Message').digest("base64"); 

How can I make them do the same? I'm still missing the salt in node.js. Suggestions?

EDIT: The answer below helped me find the solution. If other android users has this problem then this code worked for me:

try {     String secret = "secret";     String message = "Message";      Mac sha256_HMAC = Mac.getInstance("HmacSHA256");     SecretKeySpec secret_key = new SecretKeySpec(secret.getBytes(), "HmacSHA256");     sha256_HMAC.init(secret_key);     byte[] s53 = sha256_HMAC.doFinal(message.getBytes());     String hash = Base64.encodeToString(s53, Base64.DEFAULT);     Log.e("beadict", hash); } catch (Exception e){     System.out.println("Error"); } 

And this in node:

var crypto = require('crypto'); var hash = crypto.createHmac('SHA256', "secret").update("Message").digest('base64'); 

Answer 1

You can use this line:

let test = crypto.createHmac('sha256', "key").update("json").digest("base64"); 

Convert to base64 last.

Answer 2

If you want to use a HMAC then you need to use the method crypto.createHmac(algorithm, key).

I'm still missing the salt in node.js

It seems that you do not use the salt in your Java code...