tree ef1e73e3b7968b5027e0943b0537020ad340784b
parent 09ad5a825f44d21cabfa1c03deb55028afbccbd6
author Sen Jiang <senj@google.com> 1498695199 -0700
committer Sen Jiang <senj@google.com> 1507254464 -0700

Add maximum timestamp to the payload.

Added a new field max_timestamp in the protobuf, from now on
update_engine will reject any payload without this field.
If the OS build timestamp is newer than the max_timestamp, the payload
will also be rejected to prevent downgrade.

Bug: 36232423
Test: update_engine_unittests

Merged-In: Ib20f5f35aaf41165013bada02bc8720917358237
Change-Id: Ib20f5f35aaf41165013bada02bc8720917358237