Add ownership checks the Registry dApp (#4001)

* Fixes to the Registry dApp

* WIP Add Owner Lookup

* Proper sha3 implementation

* Add working owner lookup to reg dApp

* Add errors to Name Reg

* Add records error in Reg dApp

* Add errors for reverse in reg dApp

* PR Grumbles

js/src/api/util/sha3.js

@@ -14,8 +14,21 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-import { keccak_256 } from 'js-sha3'; // eslint-disable-line camelcase
+import CryptoJS from 'crypto-js';
+import CryptoSha3 from 'crypto-js/sha3';
 
-export function sha3 (value) {
-  return `0x${keccak_256(value)}`;
+export function sha3 (value, options) {
+  if (options && options.encoding === 'hex') {
+    if (value.length > 2 && value.substr(0, 2) === '0x') {
+      value = value.substr(2);
+    }
+
+    value = CryptoJS.enc.Hex.parse(value);
+  }
+
+  const hash = CryptoSha3(value, {
+    outputLength: 256
+  }).toString();
+
+  return `0x${hash}`;
 }