tree 2a0104e54b59b9881fb1e77cef314da17cbf0b7c
parent ae87b92cbe41e7a0ac9927de06d722051130a35f
author Randall Spangler <rspangler@chromium.org> 1305239865 -0700
committer Randall Spangler <rspangler@chromium.org> 1305316162 -0700

Check whether key block and preamble fit in padding.

Also add --pad as a valid option to --repack and --verify, so that
kernels with larger-than-normal padding can be verified.

BUG=chromium-os:13720
TEST=see bug 13720

Using the supplied kernel images from the bug,

vbutil_kernel --verify 007 --debug
vbutil_kernel --verify 008 --debug

These should now fail with an error that the key block extends past the padding.

Next, supply a large enough padding size that the key block and
preamble fit.  For example:

vbutil_kernel --verify 007 --pad 0x900000 --debug
vbutil_kernel --verify 008 --pad 0x900000 --debug

These should now make it past the padding check, and fail on a
subsequent test (for example, no kernel blob found).

Change-Id: I7ec32b4def29970e302bf922b96d3e206d97fe82
Reviewed-on: http://gerrit.chromium.org/gerrit/810
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Tested-by: Randall Spangler <rspangler@chromium.org>