tree 1aa80bafe4be48a143c73e9bbe3bace8c19d3a66
parent 2339599a8becf31a4eb2e2244706b9e183939e82
author Vincent Palatin <vpalatin@chromium.org> 1444956418 -0700
committer ChromeOS bot <3su6n15k.default@developer.gserviceaccount.com> 1445362300 +0000

futility: fix segfault on short files

Verify the size of the buffer read from the file before trying to use 1KB of
it for the new rwsig format detection.

Add a new test case with a short file containing only 4 bytes of unknown
data and run "futility show" on it.

BRANCH=smaug
BUG=none
TEST=futility show foobar.pub.pem
where foobar.pub.pem is a 451-byte file.
check that "make runtests" passes with the fix
and fails without it with the following message :
test_file_types.sh ... failed
FAIL: 13 / 14 passed

Reviewed-on: https://chromium-review.googlesource.com/306682
Commit-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
(cherry picked from commit 4d47243c9088ef295892fbc25b9c3622e43ad639)

Change-Id: Ie0865733811cea93a75a35f8e5b2154d0134bd90
Reviewed-on: https://chromium-review.googlesource.com/307432
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>