tree 7b3742cb78dd4d4e55dc8a1da57bb3c5aa1fc1f9
parent 895172a93d9976c6b05d3a2cb28b614dce2a2793
author Elly Jones <ellyjones@chromium.org> 1314321496 -0700
committer Elly Jones <ellyjones@chromium.org> 1314739029 -0700

verity: add support for salting.

Salting is exposed as an optional salt=<hex> argument. The salt is appended to
hashed blocks if present, padded to 32 bytes with zero bytes.

This code is not yet used by any tools, so it should have no effect.

BUG=chromium-os:12138
TEST=Adhoc, script:12138, unittest, autotest
Build an image (I did this for Kaen) and boot it.
Run the script attached to bug 12138; if it prints 'ok', everything's good.
Check that unit test 'CreateThenVerifyOkSalt' passes.
Run platform_DMVerityBitCorruption and platform_DMVerityCorruption.

Change-Id: I3eeb17d041bcd567c0908b017e9d57a896c11cc4
Signed-off-by: Elly Jones <ellyjones@chromium.org>
Reviewed-on: http://gerrit.chromium.org/gerrit/6708
Reviewed-by: Will Drewry <wad@chromium.org>