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trezor-firmware/core/embed/lib/image.h
2024-04-11 16:13:58 +02:00

139 lines
4.2 KiB
C

/*
* This file is part of the Trezor project, https://trezor.io/
*
* Copyright (c) SatoshiLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __TREZORHAL_IMAGE_H__
#define __TREZORHAL_IMAGE_H__
#include <stdint.h>
#include "blake2s.h"
#include "flash.h"
#include "image_hash_conf.h"
#include "model.h"
#include "secbool.h"
#define IMAGE_HEADER_SIZE 0x400 // size of the bootloader or firmware header
#define IMAGE_SIG_SIZE 65
#define IMAGE_INIT_CHUNK_SIZE (16 * 1024)
#define BOOTLOADER_IMAGE_MAGIC 0x425A5254 // TRZB
#define FIRMWARE_IMAGE_MAGIC 0x465A5254 // TRZF
typedef struct {
uint32_t magic;
uint32_t hdrlen;
uint32_t expiry;
uint32_t codelen;
uint32_t version;
uint32_t fix_version;
uint32_t hw_model;
uint8_t hw_revision;
uint8_t monotonic;
uint8_t reserved_0[2];
uint8_t hashes[512];
uint8_t reserved_1[415];
uint8_t sigmask;
uint8_t sig[64];
} image_header;
#define MAX_VENDOR_PUBLIC_KEYS 8
#define VTRUST_WAIT 0x000F
#define VTRUST_RED 0x0010
#define VTRUST_CLICK 0x0020
#define VTRUST_STRING 0x0040
// Two bits for historical reasons. On T2B1, only the lower bit was used with
// inverted logic (due to late inclusion of the secret handling during
// development process). On T3T1, we decided to remedy the situation by
// including the upper bit as well.
#define VTRUST_SECRET 0x0180
#define VTRUST_SECRET_ALLOW 0x0100
#define VTRUST_ALL (VTRUST_WAIT | VTRUST_RED | VTRUST_CLICK | VTRUST_STRING)
typedef struct {
uint32_t magic;
uint32_t hdrlen;
uint32_t expiry;
uint16_t version;
uint8_t vsig_m;
uint8_t vsig_n;
uint16_t vtrust;
// uint8_t reserved[14];
const uint8_t *vpub[MAX_VENDOR_PUBLIC_KEYS];
uint8_t vstr_len;
const char *vstr;
const uint8_t *vimg;
uint8_t sigmask;
uint8_t sig[64];
const uint8_t *origin; // pointer to the underlying data
} vendor_header;
typedef struct {
// vendor string
uint8_t vstr[64];
// vendor string length
size_t vstr_len;
// firmware version
uint8_t ver_major;
uint8_t ver_minor;
uint8_t ver_patch;
uint8_t ver_build;
// firmware fingerprint
uint8_t fingerprint[IMAGE_HASH_DIGEST_LENGTH];
// hash of vendor and image header
uint8_t hash[IMAGE_HASH_DIGEST_LENGTH];
} firmware_header_info_t;
const image_header *read_image_header(const uint8_t *const data,
const uint32_t magic,
const uint32_t maxsize);
secbool __wur check_image_model(const image_header *const hdr);
secbool __wur check_image_header_sig(const image_header *const hdr,
uint8_t key_m, uint8_t key_n,
const uint8_t *const *keys);
secbool __wur read_vendor_header(const uint8_t *const data,
vendor_header *const vhdr);
secbool __wur check_vendor_header_sig(const vendor_header *const vhdr,
uint8_t key_m, uint8_t key_n,
const uint8_t *const *keys);
secbool check_vendor_header_keys(const vendor_header *const vhdr);
void vendor_header_hash(const vendor_header *const vhdr, uint8_t *hash);
secbool __wur check_single_hash(const uint8_t *const hash,
const uint8_t *const data, int len);
secbool __wur check_image_contents(const image_header *const hdr,
uint32_t firstskip,
const flash_area_t *area);
void get_image_fingerprint(const image_header *const hdr, uint8_t *const out);
secbool check_firmware_header(const uint8_t *header, size_t header_size,
firmware_header_info_t *info);
#endif