tree fe5e271c356a3a6eea24e86bbecd620d87b032e7
parent 36acff7d7e88549bbeab6a08488ab48596d7fbc5
author Tianjie Xu <xunchang@google.com> 1481934249 -0800
committer Tianjie Xu <xunchang@google.com> 1481934249 -0800

Add a checker for signature boundary in verifier

The 'signature_start' variable marks the location of the signature
from the end of a zip archive. And a boundary check is missing where
'signature_start' should be within the EOCD comment field. This causes
problems when sideloading a malicious package. Also add a corresponding
test.

Bug: 31914369
Test: Verification fails correctly when sideloading recovery_test.zip on
angler.

Change-Id: I6ea96bf04dac5d8d4d6719e678d504f957b4d5c1
(cherry-picked from f69e6a9475983b2ad46729e44ab58d2b22cd74d0)