encrypt text with master password

app/password-generator.js

@@ -1,9 +1,14 @@
 (function () {
     'use strict';
+
+    var crypto = require('crypto');
+
     class PasswordGenerator {
-        make_password(key, salt){
-            return "azertyuiop";
+        static make_password(key, text, length = 10) {
+            var password = crypto.createHmac('sha1', key).update(text).digest('hex');
+            return new Buffer(password).toString('base64').substring(0, length);
         }
     }
+
     module.exports = PasswordGenerator;
 }());

tests/password-generator.tests.js

@@ -1,16 +1,20 @@
 (function () {
-  'use strict';
+    'use strict';
 
-  var assert = require('assert');
-  var PasswordGenerator = require('../app/password-generator');
+    var assert = require('assert');
+    var PasswordGenerator = require('../app/password-generator');
 
-  describe('password-generator',function () {
-    it('should return a default password with a size of 10',function () {
-      var passwordGenerator = new PasswordGenerator();
-
-      var generatedPassword = passwordGenerator.make_password('password', 'facebook');
-
-      assert.equal(10, generatedPassword.length);
+    describe('password-generator', function () {
+        it('should return a default password with a size of 10', function () {
+            var generatedPassword = PasswordGenerator.make_password('password', 'facebook');
+            assert.equal(10, generatedPassword.length);
+        });
+        it('should allow to change password length', function () {
+            var generatedPassword = PasswordGenerator.make_password('password', 'facebook', 12);
+            assert.equal(12, generatedPassword.length);
+        });
+        it('should hmac text with master password', function () {
+            assert.equal('MjE5Y2I1OG', PasswordGenerator.make_password('password', 'facebook'));
+        });
     });
-  });
 }());