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trezor-firmware/core/embed/bootloader/version_check.c

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/*
* 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/>.
*/
#include <string.h>
#include "version_check.h"
#include "error_handling.h"
#include "model_version.h"
#include "monoctr.h"
void ensure_bootloader_min_version(void) {
monoctr_write(MONOCTR_BOOTLOADER_VERSION, BOOTLOADER_MONOTONIC_VERSION);
uint8_t val = 0;
ensure(monoctr_read(MONOCTR_BOOTLOADER_VERSION, &val), NULL);
ensure(sectrue * (val == BOOTLOADER_MONOTONIC_VERSION),
"Bootloader downgrade protection");
}
secbool check_firmware_min_version(uint8_t check_version) {
uint8_t min_version = 0;
ensure(monoctr_read(MONOCTR_FIRMWARE_VERSION, &min_version), "monoctr read");
return (check_version >= min_version) * sectrue;
}
void ensure_firmware_min_version(uint8_t version) {
monoctr_write(MONOCTR_FIRMWARE_VERSION, version);
uint8_t val = 0;
ensure(monoctr_read(MONOCTR_FIRMWARE_VERSION, &val), NULL);
ensure(sectrue * (val == version), "Firmware downgrade protection");
}