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