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add vb2api_get_pcr_digest

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this api allows firmware to get the digest indicating boot mode status.

BUG=chromium:451609
TEST=VBOOT2=1 make run2tests
BRANCH=tot

Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Change-Id: Idca7bc5f6aed947689ad7cf219805aad35047c7d
Reviewed-on: https://chromium-review.googlesource.com/244542
This commit is contained in:
Daisuke Nojiri
2015-01-29 14:37:25 -08:00
committed by ChromeOS Commit Bot
parent 2559338dbd
commit 62d482ecdd
9 changed files with 198 additions and 2 deletions
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6
firmware/2lib/include/2struct.h
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@@ -21,6 +21,7 @@
#define VB2_KEY_BLOCK_FLAG_DEVELOPER_1 0x02 /* Developer switch on */
#define VB2_KEY_BLOCK_FLAG_RECOVERY_0 0x04 /* Not recovery mode */
#define VB2_KEY_BLOCK_FLAG_RECOVERY_1 0x08 /* Recovery mode */
#define VB2_GBB_HWID_DIGEST_SIZE 32
/****************************************************************************/
@@ -103,6 +104,9 @@ struct vb2_shared_data {
uint32_t gbb_rootkey_offset;
uint32_t gbb_rootkey_size;
/* HWID digest from GBB header */
uint8_t gbb_hwid_digest[VB2_GBB_HWID_DIGEST_SIZE];
/* Offset of preamble from start of vblock */
uint32_t vblock_preamble_offset;
@@ -231,7 +235,7 @@ struct vb2_gbb_header {
uint32_t recovery_key_size;
/* Added in version 1.2 */
uint8_t hwid_digest[32]; /* SHA-256 of HWID */
uint8_t hwid_digest[VB2_GBB_HWID_DIGEST_SIZE]; /* SHA-256 of HWID */
/* Pad to match EXPECETED_VB2_GBB_HEADER_SIZE. Initialize to 0. */
uint8_t pad[48];