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/*
* Copyright 2021 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef __VBOOT_REFERENCE_HOST_LIB_INCLUDE_GSC_RO_H
#define __VBOOT_REFERENCE_HOST_LIB_INCLUDE_GSC_RO_H
#include <stddef.h>
#include <stdint.h>
#include "2sha.h"
struct gscvd_ro_range {
uint32_t offset;
uint32_t size; /* Use uint32_t as opposed to size_to be portable. */
};
#define GSC_VD_MAGIC 0x65666135 /* Little endian '5 a f e' */
#define GSC_VD_ROLLBACK_COUNTER 1
struct gsc_verification_data {
uint32_t gv_magic;
/*
* Size of this structure in bytes, including the ranges array,
* signature and root key bodies.
*/
uint16_t size;
uint16_t major_version; /* Version of this struct layout. Starts at 0 */
uint16_t minor_version;
/*
* GSC will cache the counter value and will not accept verification
* data blobs with a lower value.
*/
uint16_t rollback_counter;
uint32_t gsc_board_id; /* Locks blob to certain platform. */
uint32_t gsc_flags; /* A field for future enhancements. */
/*
* The location of fmap that points to this blob. This location must
* also be in one of the verified sections, expressed as offset in
* flash
*/
uint32_t fmap_location;
uint32_t hash_alg; /* one of enum vb2_hash_algorithm alg. */
struct vb2_signature sig_header;
struct vb2_packed_key root_key_header;
/*
* SHAxxx(ranges[0].offset..ranges[0].size || ... ||
* ranges[n].offset..ranges[n].size)
*
* Let the digest space allow to accommodate the largest possible one.
*/
uint8_t ranges_digest[VB2_SHA512_DIGEST_SIZE];
uint32_t range_count; /* Number of gscvd_ro_range entries. */
struct gscvd_ro_range ranges[0];
};
#endif /* ! __VBOOT_REFERENCE_HOST_LIB_INCLUDE_GSC_RO_H */
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