DO NOT MERGE: Add a checker for signature boundary in verifier am: f616da1726 am: 5346da0220  -s ours am: a41cc29447  -s ours am: 051dfa7ec3  -s ours am: 94c8b5e5a6
am: 2b1bcab427  -s ours

Change-Id: I74119e64e0d5fe813c18191a201fadbf9870c400