add encrypt/decrypt methods

lib/walletutils.js

@@ -5,6 +5,7 @@ var PrivateKey = Bitcore.PrivateKey;
 var PublicKey = Bitcore.PublicKey;
 var crypto = Bitcore.crypto;
 var HDPath = require('./hdpath');
+var sjcl = require('sjcl');
 
 function WalletUtils() {};
 
@@ -61,8 +62,9 @@ WalletUtils.xPubToCopayerId = function(xpub) {
   return (new Bitcore.HDPublicKey(xpub)).derive(HDPath.IdBranch).publicKey.toString();
 };
 
+<< << << < HEAD
 WalletUtils.toSecret = function(walletId, walletPrivKey, network) {
-  return  walletId + ':' + walletPrivKey.toWIF() + ':' + (network == 'testnet' ? 'T' : 'L');
+  return walletId + ':' + walletPrivKey.toWIF() + ':' + (network == 'testnet' ? 'T' : 'L');
 };
 
 WalletUtils.fromSecret = function(secret) {
@@ -72,7 +74,7 @@ WalletUtils.fromSecret = function(secret) {
   var networkChar = secretSplit[2];
 
 
-  return  { 
+  return {
     walletId: walletId,
     walletPrivKey: walletPrivKey,
     network: networkChar == 'T' ? 'testnet' : 'livenet',
@@ -80,6 +82,19 @@ WalletUtils.fromSecret = function(secret) {
 };
 
 
+WalletUtils.encryptMessage = function(message, password) {
+  var key = sjcl.codec.utf8String.toBits(password);
+  key = sjcl.bitArray.clamp(key, 256);
+  return sjcl.encrypt(key, message, {
+    ks: 256,
+    iter: 1
+  });
+};
 
+WalletUtils.decryptMessage = function(cyphertextJson, password) {
+  var key = sjcl.codec.utf8String.toBits(password);
+  key = sjcl.bitArray.clamp(key, 256);
+  return sjcl.decrypt(key, cyphertextJson);
+};
 
 module.exports = WalletUtils;

package.json

@@ -30,8 +30,9 @@
     "morgan": "*",
     "npmlog": "^0.1.1",
     "preconditions": "^1.0.7",
-    "request": "^2.53.0",
     "qr-image": "*",
+    "request": "^2.53.0",
+    "sjcl": "^1.0.2",
     "uuid": "*"
   },
   "devDependencies": {

test/walletutils.js

@@ -65,4 +65,13 @@ describe('WalletUtils', function() {
       WalletUtils.verifyMessage(aLongerText, sig, aPubKey).should.equal(true);
     });
   });
+
+  describe('#encryptMessage #decryptMessage round trip', function() {
+    it('should encrypt and decrypt', function() {
+      var pwd = '0dea92f1df6675085b5cdd965487bb862f84f2755bcb56fa45dbf5b387a6c4a0';
+      var ct = WalletUtils.encryptMessage('hello world', pwd);
+      var msg = WalletUtils.decryptMessage(ct, pwd);
+      msg.should.equal('hello world');
+    });
+  });
 });