NodeBB/NodeBB

'use strict';

const path = require('path');
const crypto = require('crypto');
const workerpool = require('workerpool');

const pool = workerpool.pool(
    path.join(__dirname, '/password_worker.js'), {
        minWorkers: 1,
    }
);

exports.hash = async function (rounds, password) {
    password = crypto.createHash('sha512').update(password).digest('hex');
    return await pool.exec('hash', [password, rounds]);
};

exports.compare = async function (password, hash, shaWrapped) {
    const fakeHash = await getFakeHash();

    if (shaWrapped) {
        password = crypto.createHash('sha512').update(password).digest('hex');
    }
    return await pool.exec('compare', [password, hash || fakeHash]);
};

let fakeHashCache;
async function getFakeHash() {
    if (fakeHashCache) {
        return fakeHashCache;
    }
    fakeHashCache = await exports.hash(12, Math.random().toString());
    return fakeHashCache;
}

require('./promisify')(exports);