tree d43ea1f295a80ac4809e472d90d5ea7a4ad35896
parent 1e4284b358638792eacf2b777e5b4abb3df177a6
author Fabio Utzig <utzig@apache.org> 1566828994 -0300
committer Fabio Utzig <utzig@utzig.org> 1568034009 -0300

Add macro to check if image must be decrypted

An image must be decrypted when it is loaded on the secondary slot and
its header flag indicates it is encrypted. Instead of checking both
things every time the image is read, add a new macro, MUST_DECRYPT, that
does both checks.

Also `BOOT_CURR_ENC` was simplified to be used directly on
`bootutil_img_validate` calls, returning NULL for no encrypted images.

Signed-off-by: Fabio Utzig <utzig@apache.org>