[WIP] Adding functionality for End-to-End encrypted conversations

.meteor/packages

@@ -176,3 +176,4 @@ steffo:meteor-accounts-saml
 todda00:friendly-slugs
 yasaricli:slugify
 yasinuslu:blaze-meta
+rocketchat:e2e

.meteor/versions

@@ -142,6 +142,7 @@ rocketchat:[email protected]
 rocketchat:[email protected]
 rocketchat:[email protected]
 rocketchat:[email protected]
+rocketchat:[email protected]
 rocketchat:[email protected]
 rocketchat:[email protected]
 rocketchat:[email protected]

packages/rocketchat-e2e/client/helper.js

@@ -0,0 +1,48 @@
+/* eslint-disable no-undef, new-cap */
+
+/*
+ * vim: ts=4:sw=4
+ */
+
+RocketChat.signalUtils = (function() {
+	'use strict';
+
+	const StaticArrayBufferProto = new ArrayBuffer().__proto__;
+
+	return {
+		toString(thing) {
+			if (typeof thing === 'string') {
+				return thing;
+			}
+			return new dcodeIO.ByteBuffer.wrap(thing).toString('binary');
+		},
+		toArrayBuffer(thing) {
+			if (thing === undefined) {
+				return undefined;
+			}
+			if (thing === Object(thing)) {
+				if (thing.__proto__ === StaticArrayBufferProto) {
+					return thing;
+				}
+			}
+
+			if (typeof thing !== 'string') {
+				throw new Error(`Tried to convert a non-string of type ${ typeof thing } to an array buffer`);
+			}
+			return new dcodeIO.ByteBuffer.wrap(thing, 'binary').toArrayBuffer();
+		},
+		isEqual(a, b) {
+			// TODO: Special-case arraybuffers, etc
+			if (a === undefined || b === undefined) {
+				return false;
+			}
+			a = util.toString(a);
+			b = util.toString(b);
+			const maxLength = Math.max(a.length, b.length);
+			if (maxLength < 5) {
+				throw new Error('a/b compare too short');
+			}
+			return a.substring(0, Math.min(maxLength, a.length)) === b.substring(0, Math.min(maxLength, b.length));
+		}
+	};
+}());