Hashing and verifying in Node.js using pbkdf2

hash.js

const crypto = require("crypto");

const config = {
	hashBytes: 32,
	saltBytes: 16,
	iterations: 300000,
	digest: "sha512"
};

function hashPassword(pwd) {
	const {saltBytes} = config;
	const salt = crypto.randomBytes(saltBytes).toString("hex");
	const hash = makehash(pwd, salt);

	return [salt, hash].join("$");
}

function makehash(pwd, salt) {
	const {iterations, hashBytes, digest} = config;

	return crypto.pbkdf2Sync(pwd, salt, iterations, hashBytes, digest).toString("hex");
}

function verifyPassword(pwd, combined) {
	const [salt, originalHash] = combined.split("$");
	const hash = makehash(pwd, salt);

	return hash === originalHash;
}

module.exports = {hashPassword,verifyPassword};