Function for node.js that will encrypt password exactly like Symfony2 PHP framework. So all passwords from Symfony2 will work in your node.js application

Symfony2PasswordEncode.js

'use strict';

var crypto = require('crypto');
var _ = require('lodash');

/**
 * Will encrypt password in Symfony2 way using a given salt.
 *
 * @param {string} password
 * @param {string} salt
 * @returns {string}
 */
function encryptPassword(password, salt){
    var salted = `${password}{${salt}}`;
    if (!salt){
        salted = password;
    }
    var digest = crypto.createHash(this.algorithm).update(salted).digest('binary'); 
    for (var i = 1; i < this.iterations; i++){
        digest = crypto.createHash(this.algorithm).update( Buffer.concat([Buffer.from(digest, 'binary'), Buffer.from(salted, 'utf8')]) ).digest('binary');
    }
    return (Buffer.from(digest, 'binary')).toString('base64');
};

Many thanks @stevebaldwin21 !

Thanks @stevebaldwin21 saved us hours