mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-24 23:38:09 +00:00
339 lines
9.1 KiB
C
339 lines
9.1 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/>.
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
#include STM32_HAL_H
|
|
#include TREZOR_BOARD
|
|
#include "board_capabilities.h"
|
|
#include "bootutils.h"
|
|
#include "buffers.h"
|
|
#include "common.h"
|
|
#include "compiler_traits.h"
|
|
#include "display.h"
|
|
#include "display_draw.h"
|
|
#include "flash.h"
|
|
#include "flash_utils.h"
|
|
#include "image.h"
|
|
#include "model.h"
|
|
#include "mpu.h"
|
|
#include "pvd.h"
|
|
#include "reset_flags.h"
|
|
#include "rng.h"
|
|
#include "rsod.h"
|
|
#include "secret.h"
|
|
#include "system.h"
|
|
#include "terminal.h"
|
|
|
|
#ifdef USE_SD_CARD
|
|
#include "sdcard.h"
|
|
#endif
|
|
#ifdef USE_SDRAM
|
|
#include "sdram.h"
|
|
#endif
|
|
#ifdef USE_HASH_PROCESSOR
|
|
#include "hash_processor.h"
|
|
#endif
|
|
|
|
#ifdef USE_DMA2D
|
|
#ifdef NEW_RENDERING
|
|
#include "dma2d_bitblt.h"
|
|
#else
|
|
#include "dma2d.h"
|
|
#endif
|
|
#endif
|
|
|
|
#include "model.h"
|
|
#include "monoctr.h"
|
|
#include "option_bytes.h"
|
|
#include "version.h"
|
|
|
|
#include "memzero.h"
|
|
|
|
#ifdef STM32U5
|
|
#include "tamper.h"
|
|
#include "trustzone.h"
|
|
#endif
|
|
|
|
const uint8_t BOARDLOADER_KEY_M = 2;
|
|
const uint8_t BOARDLOADER_KEY_N = 3;
|
|
static const uint8_t * const BOARDLOADER_KEYS[] = {
|
|
#if !PRODUCTION
|
|
(const uint8_t *)"\xdb\x99\x5f\xe2\x51\x69\xd1\x41\xca\xb9\xbb\xba\x92\xba\xa0\x1f\x9f\x2e\x1e\xce\x7d\xf4\xcb\x2a\xc0\x51\x90\xf3\x7f\xcc\x1f\x9d",
|
|
(const uint8_t *)"\x21\x52\xf8\xd1\x9b\x79\x1d\x24\x45\x32\x42\xe1\x5f\x2e\xab\x6c\xb7\xcf\xfa\x7b\x6a\x5e\xd3\x00\x97\x96\x0e\x06\x98\x81\xdb\x12",
|
|
(const uint8_t *)"\x22\xfc\x29\x77\x92\xf0\xb6\xff\xc0\xbf\xcf\xdb\x7e\xdb\x0c\x0a\xa1\x4e\x02\x5a\x36\x5e\xc0\xe3\x42\xe8\x6e\x38\x29\xcb\x74\xb6",
|
|
#else
|
|
MODEL_BOARDLOADER_KEYS
|
|
#endif
|
|
};
|
|
|
|
static uint8_t get_bootloader_min_version(void) {
|
|
uint8_t version = 0;
|
|
ensure(monoctr_read(MONOCTR_BOOTLOADER_VERSION, &version), "monoctr read");
|
|
return version;
|
|
}
|
|
|
|
static void write_bootloader_min_version(uint8_t version) {
|
|
if (version > get_bootloader_min_version()) {
|
|
ensure(monoctr_write(MONOCTR_BOOTLOADER_VERSION, version), "monoctr write");
|
|
}
|
|
}
|
|
|
|
struct BoardCapabilities capabilities
|
|
__attribute__((section(".capabilities_section"))) = {
|
|
.header = CAPABILITIES_HEADER,
|
|
.model_tag = TAG_MODEL_NAME,
|
|
.model_length = sizeof(uint32_t),
|
|
.model_name = HW_MODEL,
|
|
.version_tag = TAG_BOARDLOADER_VERSION,
|
|
.version_length = sizeof(struct BoardloaderVersion),
|
|
.version = {.version_major = VERSION_MAJOR,
|
|
.version_minor = VERSION_MINOR,
|
|
.version_patch = VERSION_PATCH,
|
|
.version_build = VERSION_BUILD},
|
|
.terminator_tag = TAG_TERMINATOR,
|
|
.terminator_length = 0};
|
|
|
|
// we use SRAM as SD card read buffer (because DMA can't access the CCMRAM)
|
|
BUFFER_SECTION uint32_t sdcard_buf[BOOTLOADER_MAXSIZE / sizeof(uint32_t)];
|
|
|
|
#if defined USE_SD_CARD
|
|
static uint32_t check_sdcard(void) {
|
|
if (sectrue != sdcard_power_on()) {
|
|
return 0;
|
|
}
|
|
|
|
uint64_t cap = sdcard_get_capacity_in_bytes();
|
|
if (cap < 1024 * 1024) {
|
|
sdcard_power_off();
|
|
return 0;
|
|
}
|
|
|
|
memzero(sdcard_buf, IMAGE_HEADER_SIZE);
|
|
|
|
const secbool read_status =
|
|
sdcard_read_blocks(sdcard_buf, 0, BOOTLOADER_MAXSIZE / SDCARD_BLOCK_SIZE);
|
|
|
|
sdcard_power_off();
|
|
|
|
if (sectrue == read_status) {
|
|
const image_header *hdr =
|
|
read_image_header((const uint8_t *)sdcard_buf, BOOTLOADER_IMAGE_MAGIC,
|
|
BOOTLOADER_MAXSIZE);
|
|
|
|
if (hdr != (const image_header *)sdcard_buf) {
|
|
return 0;
|
|
}
|
|
|
|
if (sectrue != check_image_model(hdr)) {
|
|
return 0;
|
|
}
|
|
|
|
if (sectrue != check_image_header_sig(hdr, BOARDLOADER_KEY_M,
|
|
BOARDLOADER_KEY_N,
|
|
BOARDLOADER_KEYS)) {
|
|
return 0;
|
|
}
|
|
|
|
_Static_assert(IMAGE_CHUNK_SIZE >= BOOTLOADER_MAXSIZE,
|
|
"BOOTLOADER IMAGE MAXSIZE too large for IMAGE_CHUNK_SIZE");
|
|
|
|
const uint32_t headers_end_offset = hdr->hdrlen;
|
|
const uint32_t code_start_offset = IMAGE_CODE_ALIGN(headers_end_offset);
|
|
|
|
for (uint32_t i = headers_end_offset; i < code_start_offset; i++) {
|
|
if (((uint8_t *)sdcard_buf)[i] != 0) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (sectrue !=
|
|
(check_single_hash(hdr->hashes,
|
|
(const uint8_t *)sdcard_buf + code_start_offset,
|
|
hdr->codelen))) {
|
|
return 0;
|
|
}
|
|
|
|
for (int i = IMAGE_HASH_DIGEST_LENGTH; i < sizeof(hdr->hashes); i++) {
|
|
if (hdr->hashes[i] != 0) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (hdr->monotonic < get_bootloader_min_version()) {
|
|
return 0;
|
|
}
|
|
|
|
return hdr->codelen;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void progress_callback(int pos, int len) { term_printf("."); }
|
|
|
|
static secbool copy_sdcard(void) {
|
|
display_backlight(255);
|
|
|
|
term_printf("Trezor Boardloader\n");
|
|
term_printf("==================\n\n");
|
|
|
|
term_printf("bootloader found on the SD card\n\n");
|
|
term_printf("applying bootloader in 10 seconds\n\n");
|
|
term_printf("unplug now if you want to abort\n\n");
|
|
|
|
uint32_t codelen;
|
|
|
|
for (int i = 10; i >= 0; i--) {
|
|
term_printf("%d ", i);
|
|
hal_delay(1000);
|
|
codelen = check_sdcard();
|
|
if (0 == codelen) {
|
|
term_printf("\n\nno SD card, aborting\n");
|
|
return secfalse;
|
|
}
|
|
}
|
|
|
|
term_printf("\n\nerasing flash:\n\n");
|
|
|
|
// erase all flash (except boardloader)
|
|
if (sectrue != erase_device(progress_callback)) {
|
|
term_printf(" failed\n");
|
|
return secfalse;
|
|
}
|
|
term_printf(" done\n\n");
|
|
|
|
ensure(flash_unlock_write(), NULL);
|
|
|
|
// copy bootloader from SD card to Flash
|
|
term_printf("copying new bootloader from SD card\n\n");
|
|
|
|
ensure(flash_area_write_data(&BOOTLOADER_AREA, 0, sdcard_buf,
|
|
IMAGE_HEADER_SIZE + codelen),
|
|
NULL);
|
|
|
|
ensure(flash_lock_write(), NULL);
|
|
|
|
term_printf("\ndone\n\n");
|
|
term_printf("Unplug the device and remove the SD card\n");
|
|
|
|
return sectrue;
|
|
}
|
|
#endif
|
|
|
|
int main(void) {
|
|
system_init(&rsod_panic_handler);
|
|
|
|
reset_flags_reset();
|
|
|
|
#ifdef USE_PVD
|
|
pvd_init();
|
|
#endif
|
|
|
|
if (sectrue != flash_configure_option_bytes()) {
|
|
// display is not initialized so don't call ensure
|
|
erase_storage(NULL);
|
|
return 2;
|
|
}
|
|
|
|
#ifdef STM32U5
|
|
tamper_init();
|
|
|
|
trustzone_init_boardloader();
|
|
#endif
|
|
|
|
secret_init();
|
|
|
|
#ifdef USE_SDRAM
|
|
sdram_init();
|
|
#endif
|
|
|
|
#ifdef USE_HASH_PROCESSOR
|
|
hash_processor_init();
|
|
#endif
|
|
|
|
#ifdef USE_DMA2D
|
|
dma2d_init();
|
|
#endif
|
|
|
|
display_init(DISPLAY_RESET_CONTENT);
|
|
|
|
display_clear();
|
|
display_refresh();
|
|
|
|
#if defined USE_SD_CARD
|
|
sdcard_init();
|
|
|
|
// If the bootloader is being updated from SD card, we need to preserve the
|
|
// monotonic counter from the old bootloader. This is in case that the old
|
|
// bootloader did not have the chance yet to write its monotonic counter to
|
|
// the secret area - which normally happens later in the flow.
|
|
const image_header *old_hdr = read_image_header(
|
|
(const uint8_t *)BOOTLOADER_START, BOOTLOADER_IMAGE_MAGIC,
|
|
flash_area_get_size(&BOOTLOADER_AREA));
|
|
|
|
if ((old_hdr != NULL) &&
|
|
(sectrue == check_image_header_sig(old_hdr, BOARDLOADER_KEY_M,
|
|
BOARDLOADER_KEY_N,
|
|
BOARDLOADER_KEYS)) &&
|
|
(sectrue ==
|
|
check_image_contents(old_hdr, IMAGE_HEADER_SIZE, &BOOTLOADER_AREA))) {
|
|
write_bootloader_min_version(old_hdr->monotonic);
|
|
}
|
|
|
|
if (check_sdcard()) {
|
|
return copy_sdcard() == sectrue ? 0 : 3;
|
|
}
|
|
#endif
|
|
|
|
const image_header *hdr = read_image_header(
|
|
(const uint8_t *)BOOTLOADER_START, BOOTLOADER_IMAGE_MAGIC,
|
|
flash_area_get_size(&BOOTLOADER_AREA));
|
|
|
|
ensure(hdr == (const image_header *)BOOTLOADER_START ? sectrue : secfalse,
|
|
"invalid bootloader header");
|
|
|
|
ensure(check_image_header_sig(hdr, BOARDLOADER_KEY_M, BOARDLOADER_KEY_N,
|
|
BOARDLOADER_KEYS),
|
|
"invalid bootloader signature");
|
|
|
|
ensure(check_image_contents(hdr, IMAGE_HEADER_SIZE, &BOOTLOADER_AREA),
|
|
"invalid bootloader hash");
|
|
|
|
uint8_t bld_min_version = get_bootloader_min_version();
|
|
ensure((hdr->monotonic >= bld_min_version) * sectrue,
|
|
"BOOTLOADER DOWNGRADED");
|
|
// Write the bootloader version to the secret area.
|
|
// This includes the version of bootloader potentially updated from SD card.
|
|
write_bootloader_min_version(hdr->monotonic);
|
|
|
|
display_deinit(DISPLAY_JUMP_BEHAVIOR);
|
|
|
|
#ifdef ENSURE_COMPATIBLE_SETTINGS
|
|
ensure_compatible_settings();
|
|
#endif
|
|
|
|
mpu_reconfig(MPU_MODE_DISABLED);
|
|
|
|
// g_boot_command is preserved on STM32U5
|
|
jump_to(IMAGE_CODE_ALIGN(BOOTLOADER_START + IMAGE_HEADER_SIZE));
|
|
|
|
return 0;
|
|
}
|