Initial encryption test is working on Chrome and iOS.

src/js/services/encryptionService.js

@@ -0,0 +1,86 @@
+'use strict';
+
+angular.module('copayApp.services').factory('encryptionService', function($log) {
+  var root = {};
+
+  //lazy creation of cipher and decipher?
+
+  // need a function to get the key
+  var password = 'password';
+
+  function _getGetOrCreateKey() {
+
+    //crytpo.scrypt()
+    //crypto.createCipheriv()
+  };
+
+  function encryptUsingcrypto(str) {
+    var cipher = crypto.createCipher('aes256', password);
+
+    cipher.on('readable', () => {
+      var data = cipher.read();
+      if (data) {
+        encrypted += data.toString('hex');
+      }
+    });
+    
+    cipher.on('end', () => {
+      console.log('Encrypted 1: ' + encrypted);
+      //cb();
+    });
+
+    //cipher.write(str);
+    cipher.write(str);
+    cipher.end();
+  }
+
+  function encryptUsingCryptoJS(str) {
+    var ciphertext = CryptoJS.AES.encrypt(str, password);
+    $log.debug('cipherText: ' + ciphertext);
+  }
+
+  root.encrypt = function(str, cb) {
+    $log.debug('*** crypto   exists: ' + !!crypto);
+    $log.debug('*** CryptoJS exists: ' + !!CryptoJS);
+
+    encryptUsingCryptoJS('I am a secret.');
+
+/*
+  //  var ciphertext = CryptoJS.AES.encrypt(str, password);
+    var cipher = crypto.createCipher('aes256', password);
+
+    cipher.on('readable', () => {
+      var data = cipher.read();
+      if (data) {
+        encrypted += data.toString('hex');
+      }
+    });
+    
+    cipher.on('end', () => {
+      console.log('Encrypted: ' + encrypted);
+      //cb();
+    });
+
+    //cipher.write(str);
+    cipher.write('I am secret');
+    cipher.end();
+    */
+    
+  };
+
+  root.encryptedObjectFromString = function(str) {
+    try {
+      var parsed = JSON.parse(str);
+    } catch(e) {
+      return null;
+    }
+
+    if (parsed.encryptionVersion) {
+      return parsed;
+    } else {
+      return null;
+    }
+  };
+
+  return root;
+});