Add --describe flag to {firmware|kernel}_utility.

This spews out useful information about a verified boot firmware/kernel image. Also adds a helper function to calculate header checksum. That code was being duplicated at multiple places.

Review URL: http://codereview.chromium.org/1088001
10 files changed
tree: fcb4595137d76d31d237938ea16aefb6d8b5dcc0
  1. common/
  2. crypto/
  3. include/
  4. tests/
  5. utils/
  6. Makefile
  7. README