Added dictionary.js

A key generator that uses a dictionary to create its keys

lib/key_generators/dictionary.js

@@ -0,0 +1,37 @@
+var rand = require('random-js');
+var fs = require('fs')
+var dictionary;
+var randomEngine;
+var random;
+
+var DictionaryGenerator = function(options) {
+  //Options
+  if (!options) 
+    return done(Error('No options passed to generator'));
+  if(!options.path)
+    return done(Error('No dictionary path specified in options'));
+  
+  //Load dictionary
+  fs.readFile(options.path,'utf8',(err,data) => {
+    if(err) throw err;
+    dictionary = data.split(',');
+    
+    //Remove any non alpha-numeric characters
+    for(var i = 0; i < dictionary.length; i++){
+      dictionary[i] = dictionary[i].replace(/\W/g,'');
+    }
+
+    random = rand.integer(0,dictionary.length);
+    randomEngine = rand.engines.nativeMath;
+    });
+};
+
+//Generates a dictionary-based key, of keyLength words
+DictionaryGenerator.prototype.createKey = function(keyLength) {
+  var text = '';
+  for(var i = 0; i < keyLength; i++)
+    text += dictionary[random(randomEngine)];
+  return text;
+};
+
+module.exports = DictionaryGenerator;