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vboot2: Scramble the GBB magic number

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Compiling in the GBB magic number as is causes any tools that search for the
number to fail. This patch allows firmware to embed XOR'ed signature.

TEST=Booted Nyan in normal mode. FAFT:firmware_DevMode passes.
BUG=none
BRANCH=none
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>

Change-Id: Id18905a9969af3db24151e7c51332d0e94405108
Reviewed-on: https://chromium-review.googlesource.com/205416
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Queue: Daisuke Nojiri <dnojiri@chromium.org>
Tested-by: Daisuke Nojiri <dnojiri@chromium.org>
This commit is contained in:
Daisuke Nojiri
2014-06-24 12:26:39 -07:00
committed by chrome-internal-fetch
parent 25c95d0774
commit fc17308c39
3 changed files with 28 additions and 5 deletions
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8
firmware/2lib/include/2misc.h
View File

@@ -22,6 +22,14 @@ static __inline struct vb2_shared_data *vb2_get_sd(struct vb2_context *ctx) {
return (struct vb2_shared_data *)ctx->workbuf;
}
/**
* Validate gbb signature (the magic number)
*
* @param sig pointer to the signature bytes to validate
* @return VB2_SUCCESS if valid or VB2_ERROR_GBB_MAGIC otherwise.
*/
int vb2_validate_gbb_signature(uint8_t *sig);
/**
* Initialize a work buffer from the vboot context.
*