Migrate CONFIG_LMB in Kconfig.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>

It's not always desirable to use 'keydir' and some ad-hoc heuristics
to get the filename of the signing key. More often, just passing the
filename is the simpler, easier, and logical thing to do.

Since mkimage doesn't use long options, we're slowly running out of
letters. I've chosen '-G' because it was available.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

mkimage supports rsa2048, and rsa4096 signatures. With newer silicon
now supporting hardware-accelerated ECDSA, it makes sense to expand
signing support to elliptic curves.

Implement host-side ECDSA signing and verification with libcrypto.
Device-side implementation of signature verification is beyond the
scope of this patch.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

rsa-checksum.c sontains the hash_calculate() implementations. Despite
the "rsa-" file prefix, this function is useful for other algorithms.

To prevent confusion, move this file to lib/, and rename it to
hash-checksum.c, to give it a more "generic" feel.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

Prepare v2021.04-rc5

Sandbox is special in that it is used for testing and it does not match
any particular target architecture. Allow it to load an image from any
architecture, so that 'bootm' can be used as needed.

Signed-off-by: Simon Glass <sjg@chromium.org>

Unfortunately -ENODATA is not available in OpenBSD. Use -EBADMSG
instead, to indicate a missing timestamp.

Fixes: c5819701a3d image: Adjust the workings of fit_check_format()
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Mark Kettenis <kettenis@openbsd.org>

There's no point in guarding function prototypes with #ifdefs. If a
function is not defined, the linker will notice. Having the prototype
does not affect code size.

What the #if guard takes away is the ability to use IS_ENABLED:

	if (CONFIG_IS ENABLED(FIT_IMAGE_POST_PROCESS))
		board_fit_image_post_process(...)

When the prototype is guarded, the above form cannot be used. This
leads to the proliferation of #ifdefs, and unreadable code. The
opportunity cost of the #if guard outweighs any benefits. Remove it.

Since the original version of this patch, an empty definition was
added by commit f14e6eec6c7f ("image: cleanup pre-processor usage").
The empty definition can cause silent failures, when an implementation
of board_fit_image_post_process() is expected because the linker will
not catch the missing function. Thus this patch removes this empty
inline declaration.

Fixes: f14e6eec6c7f ("image: cleanup pre-processor usage")
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

At present this function does not accept a size for the FIT. This means
that it must be read from the FIT itself, introducing potential security
risk. Update the function to include a size parameter, which can be
invalid, in which case fit_check_format() calculates it.

For now no callers pass the size, but this can be updated later.

Also adjust the return value to an error code so that all the different
types of problems can be distinguished by the user.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reported-by: Bruce Monroe <bruce.monroe@intel.com>
Reported-by: Arie Haenel <arie.haenel@intel.com>
Reported-by: Julien Lenoir <julien.lenoir@intel.com>

So far we used the separate mksunxiboot tool for generating a bootable
image for Allwinner SPLs, probably just for historical reasons.

Use the mkimage framework to generate a so called eGON image the
Allwinner BROM expects.
The new image type is called "sunxi_egon", to differentiate it
from the (still to be implemented) secure boot TOC0 image.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Simon Glass <sjg@chromium.org>