Set timestamps in dataMessage, prepare for validation

libtextsecure/message_receiver.js

@@ -1304,6 +1304,15 @@ MessageReceiver.prototype.extend({
     // Note that messages may (generally) only perform one action and we ignore remaining
     //   fields after the first action.
 
+    const TIMESTAMP_VALIDATION = false;
+    if (TIMESTAMP_VALIDATION && envelope.timestamp !== decrypted.timestamp) {
+      throw new Error(
+        `Timestamp ${
+          decrypted.timestamp
+        } in DataMessage did not match envelope timestamp ${envelope.timestamp}`
+      );
+    }
+
     if (decrypted.flags == null) {
       decrypted.flags = 0;
     }

libtextsecure/sendmessage.js

@@ -98,10 +98,13 @@ Message.prototype = {
       return this.dataMessage;
     }
     const proto = new textsecure.protobuf.DataMessage();
+
+    proto.timestamp = this.timestamp;
+    proto.attachments = this.attachmentPointers;
+
     if (this.body) {
       proto.body = this.body;
     }
-    proto.attachments = this.attachmentPointers;
     if (this.flags) {
       proto.flags = this.flags;
     }
@@ -154,7 +157,6 @@ Message.prototype = {
     if (this.expireTimer) {
       proto.expireTimer = this.expireTimer;
     }
-
     if (this.profileKey) {
       proto.profileKey = this.profileKey;
     }
@@ -535,7 +537,7 @@ MessageSender.prototype = {
     return this.sendIndividualProto(
       myNumber,
       contentMessage,
-      Date.now(),
+      timestamp,
       silent,
       options
     );