diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2015-12-15 15:57:11 -0600 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2016-01-06 01:12:04 +0100 |
| commit | cbb6c75061c5435f115629b1546e21157de3d194 (patch) | |
| tree | 14a3ce70c8c780a1a5b7c5f7f38e29d2f40e92c9 /src/commonlib/include | |
| parent | 3e6303ebe20889235418e08706302f7976fdf33a (diff) | |
commonlib: Add function to hash contents of a CBFS region.
Provide a common routine to hash the contents of a cbfs
region. The cbfs region is hashed in the following order:
1. potential cbfs header at offset 0
2. potential cbfs header retlative offset at cbfs size - 4
3. For each file the metadata of the file.
4. For each non-empty file the data of the file.
BUG=chrome-os-partner:48412
BUG=chromium:445938
BRANCH=None
TEST=Utilized in chromeos cros_bundle_firmware as well as at
runtime during vboot verification on glados.
Change-Id: Ie1e5db5b8a80d9465e88d3f69f5367d887bdf73f
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/12786
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/commonlib/include')
| -rw-r--r-- | src/commonlib/include/commonlib/cbfs.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/commonlib/include/commonlib/cbfs.h b/src/commonlib/include/commonlib/cbfs.h index b0a468cdc9..c74dd708e3 100644 --- a/src/commonlib/include/commonlib/cbfs.h +++ b/src/commonlib/include/commonlib/cbfs.h @@ -18,6 +18,9 @@ #include <commonlib/cbfs_serialized.h> #include <commonlib/region.h> +/* TODO: remove me! This is for vboot_handoff.c's benefit. */ +#define NEED_VB20_INTERNALS +#include <vb2_api.h> /* Object representing cbfs files. */ struct cbfsf { @@ -52,4 +55,13 @@ static inline void cbfs_file_metadata(struct region_device *metadata, int cbfs_for_each_file(const struct region_device *cbfs, const struct cbfsf *prev, struct cbfsf *fh); +/* + * Perform the vb2 hash over the CBFS region skipping empty file contents. + * Caller is responsible for providing the hash algorithm as well as storage + * for the final digest. Return 0 on success or non-zero on error. + */ +int cbfs_vb2_hash_contents(const struct region_device *cbfs, + enum vb2_hash_algorithm hash_alg, void *digest, + size_t digest_sz); + #endif |