closes #1976

bcrypt.js

@@ -0,0 +1,30 @@
+
+'use strict';
+
+
+var bcrypt = require('bcryptjs');
+
+process.on('message', function(m) {
+	if (m.type === 'hash') {
+		hash(m.rounds, m.password);
+	} else if (m.type === 'compare') {
+		compare(m.password, m.hash);
+	}
+});
+
+function hash(rounds, password) {
+	bcrypt.genSalt(rounds, function(err, salt) {
+		if (err) {
+			return process.send({type:'hash', err: {message: err.message}});
+		}
+		bcrypt.hash(password, salt, function(err, hash) {
+			process.send({type:'hash', err: err ? {message: err.message} : null, hash: hash, password: password});
+		});
+	});
+}
+
+function compare(password, hash) {
+	bcrypt.compare(password, hash, function(err, res) {
+		process.send({type:'compare', err: err ? {message: err.message} : null, hash: hash, password: password, result: res});
+	});
+}

src/password.js

@@ -0,0 +1,51 @@
+
+
+'use strict';
+var fork = require('child_process').fork;
+
+(function(module) {
+
+	var child = fork('./bcrypt', process.argv.slice(2), {
+					env: process.env
+				});
+
+	var callbacks = {
+		'hash': {},
+		'compare': {}
+	};
+
+	module.hash = function(rounds, password, callback) {
+		sendCommand({type: 'hash', password: password, rounds: rounds}, callback);
+	};
+
+	module.compare = function(password, hash, callback) {
+		sendCommand({type: 'compare', password: password, hash: hash}, callback);
+	};
+
+	function sendCommand(data, callback) {
+		callbacks[data.type][data.password] = callbacks[data.type][data.password] || [];
+		callbacks[data.type][data.password].push(callback);
+		child.send(data);
+	}
+
+	child.on('message', function(msg) {
+		var cbs = callbacks[msg.type] ? callbacks[msg.type][msg.password] : null;
+
+		if (Array.isArray(cbs)) {
+			if (msg.err) {
+				var err = new Error(msg.err.message);
+				cbs.forEach(function(callback) {
+					callback(err);
+				});
+				cbs.length = 0;
+				return;
+			}
+
+			cbs.forEach(function(callback) {
+				callback(null, msg.type === 'hash' ? msg.hash : msg.result);
+			});
+			cbs.length = 0;
+		}
+	});
+
+}(exports));

src/routes/authentication.js

@@ -4,15 +4,15 @@
 	var passport = require('passport'),
 		passportLocal = require('passport-local').Strategy,
 		nconf = require('nconf'),
-		bcrypt = require('bcryptjs'),
+		Password = require('../password'),
 		winston = require('winston'),
 		async = require('async'),
 
-		meta = require('./../meta'),
-		user = require('./../user'),
-		plugins = require('./../plugins'),
+		meta = require('../meta'),
+		user = require('../user'),
+		plugins = require('../plugins'),
 		db = require('../database'),
-		utils = require('./../../public/src/utils'),
+		utils = require('../../public/src/utils'),
 
 		login_strategies = [];
 
@@ -226,7 +226,7 @@
 						return next(null, false, '[[error:user-banned]]');
 					}
 
-					bcrypt.compare(password, userData.password, function(err, res) {
+					Password.compare(password, userData.password, function(err, res) {
 						if (err) {
 							return next(new Error('bcrypt compare error'));
 						}

src/user.js

@@ -1,6 +1,6 @@
 'use strict';
 
-var bcrypt = require('bcryptjs'),
+var
 	async = require('async'),
 	nconf = require('nconf'),
 	gravatar = require('gravatar'),
@@ -9,7 +9,8 @@ var bcrypt = require('bcryptjs'),
 	db = require('./database'),
 	meta = require('./meta'),
 	groups = require('./groups'),
-	emitter = require('./emitter');
+	emitter = require('./emitter'),
+	Password = require('./password');
 
 (function(User) {
 
@@ -295,12 +296,7 @@ var bcrypt = require('bcryptjs'),
 			return callback(null, password);
 		}
 
-		bcrypt.genSalt(nconf.get('bcrypt_rounds'), function(err, salt) {
-			if (err) {
-				return callback(err);
-			}
-			bcrypt.hash(password, salt, callback);
-		});
+		Password.hash(nconf.get('bcrypt_rounds'), password, callback);
 	};
 
 	User.onNewPostMade = function(postData) {

src/user/profile.js

@@ -1,15 +1,15 @@
 
 'use strict';
 
-var bcrypt = require('bcryptjs'),
-	async = require('async'),
+var async = require('async'),
 	validator = require('validator'),
 	S = require('string'),
 
-	utils = require('./../../public/src/utils'),
-	meta = require('./../meta'),
-	events = require('./../events'),
-	db = require('./../database');
+	utils = require('../../public/src/utils'),
+	meta = require('../meta'),
+	events = require('../events'),
+	db = require('../database'),
+	Password = require('../password');
 
 module.exports = function(User) {
 
@@ -248,7 +248,7 @@ module.exports = function(User) {
 					return hashAndSetPassword(callback);
 				}
 
-				bcrypt.compare(data.currentPassword, currentPassword, function(err, res) {
+				Password.compare(data.currentPassword, currentPassword, function(err, res) {
 					if (err || !res) {
 						return callback(err || new Error('[[user:change_password_error_wrong_current]]'));
 					}