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Add hwid digest field to GBB header

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This adds a field in the GBB header to store the sha256 digest of
the HWID string, and updates gbb_utility so that it stores the
digest when it modifies the HWID. Because this is a new field,
the GBB_MINOR_VER is incremented.

BUG=chromium:415227
BRANCH=ToT
TEST=make runtests, VBOOT2=1 make runtests

Since the GBB is in the RO firmware, there should be no side
effects for existing devices (but even without that, they should
handle a minor version change without complaint).

Change-Id: Icdb2a0b564677b0b65e58df897d2ec5af3964998
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/221360
This commit is contained in:
Bill Richardson
2014-10-02 18:50:33 -07:00
committed by chrome-internal-fetch
parent 8bb3689d42
commit 6df3e33912
12 changed files with 132 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
firmware/include/gbb_header.h
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@@ -26,7 +26,8 @@
* return default values for those fields.
*/
#define GBB_MAJOR_VER 1
#define GBB_MINOR_VER 1
#define GBB_MINOR_VER 2
/* v1.2 - added field to hold sha256 digest of the HWID */
/* Maximum length of a HWID in bytes, counting terminating null. */
#define GBB_HWID_MAX_SIZE 256
@@ -86,8 +87,10 @@ typedef struct GoogleBinaryBlockHeader
uint32_t bmpfv_size;
uint32_t recovery_key_offset; /* Recovery key */
uint32_t recovery_key_size;
/* Added in version 1.2 */
uint8_t hwid_digest[32]; /* sha256 */
uint8_t pad[80]; /* To match GBB_HEADER_SIZE. Initialize to 0. */
uint8_t pad[48]; /* To match GBB_HEADER_SIZE. Initialize to 0. */
} __attribute__((packed)) GoogleBinaryBlockHeader;
#ifdef __cplusplus