Added brute force protection to login

Closes half of #468
* adds a 2 second limit until you can retry logging in, otherwise sends you a 401.
* bounce: 2ms, checks the pw: 254ms on my machine
* added a test to the casper suite

core/server/controllers/admin.js

@@ -13,7 +13,8 @@ var Ghost = require('../../ghost'),
     ghost = new Ghost(),
     dataProvider = ghost.dataProvider,
     adminNavbar,
-    adminControllers;
+    adminControllers,
+    loginSecurity = [];
 
  // TODO: combine path/navClass to single "slug(?)" variable with no prefix
 adminNavbar = {
@@ -43,6 +44,7 @@ adminNavbar = {
     }
 };
 
+
 // TODO: make this a util or helper
 function setSelected(list, name) {
     _.each(list, function (item, key) {
@@ -93,6 +95,17 @@ adminControllers = {
         });
     },
     'auth': function (req, res) {
+        var currentTime = process.hrtime()[0],
+            denied = '';
+        loginSecurity = _.filter(loginSecurity, function (ipTime) {
+            return (ipTime.time + 2 > currentTime);
+        });
+        denied = _.find(loginSecurity, function (ipTime) {
+            return (ipTime.ip === req.connection.remoteAddress);
+        });
+
+        if (!denied) {
+            loginSecurity.push({ip: req.connection.remoteAddress, time: process.hrtime()[0]});
             api.users.check({email: req.body.email, pw: req.body.password}).then(function (user) {
                 req.session.user = user.id;
                 res.json(200, {redirect: req.body.redirect ? '/ghost/'
@@ -100,6 +113,10 @@ adminControllers = {
             }, function (error) {
                 res.json(401, {error: error.message});
             });
+        } else {
+            res.json(401, {error: 'Slow down, there are way too many login attempts!'});
+        }
+
     },
     changepw: function (req, res) {
         api.users.changePassword({

core/test/functional/admin/01_login_test.js

@@ -1,4 +1,4 @@
-/*globals casper, __utils__, url, user */
+/*globals casper, __utils__, url, user, falseUser */
 casper.test.begin("Ghost admin will load login page", 2, function suite(test) {
 
     casper.test.filename = "admin_test.png";
@@ -45,3 +45,38 @@ casper.test.begin("Can login to Ghost", 3, function suite(test) {
         test.done();
     });
 });
+
+casper.test.begin("Can't spam it", 2, function suite(test) {
+
+    casper.test.filename = "login_test.png";
+
+    casper.start(url + "ghost/login/", function testTitle() {
+        test.assertTitle("", "Ghost admin has no title");
+    }).viewport(1280, 1024);
+
+    casper.waitFor(function checkOpaque() {
+        return this.evaluate(function () {
+            var loginBox = document.querySelector('.login-box');
+            return window.getComputedStyle(loginBox).getPropertyValue('display') === "block"
+                && window.getComputedStyle(loginBox).getPropertyValue('opacity') === "1";
+        });
+    }, function then() {
+        this.fill("#login", falseUser, true);
+        casper.wait(200, function doneWait() {
+            this.fill("#login", falseUser, true);
+        });
+
+    });
+    casper.wait(200, function doneWait() {
+        this.echo("I've waited for 1 seconds.");
+    });
+
+    casper.then(function testForErrorMessage() {
+        test.assertSelectorHasText('.notification-error', 'Slow down, there are way too many login attempts!');
+    });
+
+    casper.run(function () {
+        test.done();
+    });
+});
+

core/test/functional/base.js

@@ -31,6 +31,10 @@ var host = casper.cli.options.host || 'localhost',
         email: email,
         password: password
     },
+    falseUser = {
+        email: email,
+        password: 'letmethrough'
+    },
     testPost = {
         title: "Bacon ipsum dolor sit amet",
         content: "I am a test post.\n#I have some small content"