mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-26 17:38:39 +00:00
550 lines
15 KiB
C
550 lines
15 KiB
C
/*
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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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#include <string.h>
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#include <sys/types.h>
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#include "common.h"
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#include "display.h"
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#include "flash.h"
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#include "image.h"
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#include "random_delays.h"
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#include "secbool.h"
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#ifdef TREZOR_EMULATOR
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#include "emulator.h"
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#else
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#include "compiler_traits.h"
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#include "mini_printf.h"
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#include "mpu.h"
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#include "stm32.h"
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#endif
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#ifdef USE_DMA2D
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#include "dma2d.h"
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#endif
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#ifdef USE_I2C
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#include "i2c.h"
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#endif
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#ifdef USE_TOUCH
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#include "touch/touch.h"
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#endif
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#ifdef USE_BUTTON
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#include "button.h"
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#endif
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#ifdef USE_RGB_LED
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#include "rgb_led.h"
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#endif
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#include "model.h"
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#include "usb.h"
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#include "version.h"
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#include "bootui.h"
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#include "messages.h"
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#include "rust_ui.h"
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#include "unit_variant.h"
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const uint8_t BOOTLOADER_KEY_M = 2;
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const uint8_t BOOTLOADER_KEY_N = 3;
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static const uint8_t * const BOOTLOADER_KEYS[] = {
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#if BOOTLOADER_QA
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/*** DEVEL/QA KEYS ***/
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(const uint8_t *)"\xd7\x59\x79\x3b\xbc\x13\xa2\x81\x9a\x82\x7c\x76\xad\xb6\xfb\xa8\xa4\x9a\xee\x00\x7f\x49\xf2\xd0\x99\x2d\x99\xb8\x25\xad\x2c\x48",
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(const uint8_t *)"\x63\x55\x69\x1c\x17\x8a\x8f\xf9\x10\x07\xa7\x47\x8a\xfb\x95\x5e\xf7\x35\x2c\x63\xe7\xb2\x57\x03\x98\x4c\xf7\x8b\x26\xe2\x1a\x56",
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(const uint8_t *)"\xee\x93\xa4\xf6\x6f\x8d\x16\xb8\x19\xbb\x9b\xeb\x9f\xfc\xcd\xfc\xdc\x14\x12\xe8\x7f\xee\x6a\x32\x4c\x2a\x99\xa1\xe0\xe6\x71\x48",
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#else
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MODEL_BOOTLOADER_KEYS
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#endif
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};
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#define USB_IFACE_NUM 0
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typedef enum {
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CONTINUE = 0,
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RETURN = 1,
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SHUTDOWN = 2,
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} usb_result_t;
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static void usb_init_all(secbool usb21_landing) {
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usb_dev_info_t dev_info = {
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.device_class = 0x00,
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.device_subclass = 0x00,
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.device_protocol = 0x00,
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.vendor_id = 0x1209,
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.product_id = 0x53C0,
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.release_num = 0x0200,
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.manufacturer = "SatoshiLabs",
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.product = "TREZOR",
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.serial_number = "000000000000000000000000",
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.interface = "TREZOR Interface",
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.usb21_enabled = sectrue,
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.usb21_landing = usb21_landing,
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};
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static uint8_t rx_buffer[USB_PACKET_SIZE];
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static const usb_webusb_info_t webusb_info = {
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.iface_num = USB_IFACE_NUM,
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#ifdef TREZOR_EMULATOR
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.emu_port = 21324,
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#else
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.ep_in = USB_EP_DIR_IN | 0x01,
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.ep_out = USB_EP_DIR_OUT | 0x01,
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#endif
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.subclass = 0,
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.protocol = 0,
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.max_packet_len = sizeof(rx_buffer),
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.rx_buffer = rx_buffer,
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.polling_interval = 1,
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};
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usb_init(&dev_info);
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ensure(usb_webusb_add(&webusb_info), NULL);
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usb_start();
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}
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static usb_result_t bootloader_usb_loop(const vendor_header *const vhdr,
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const image_header *const hdr) {
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// if both are NULL, we don't have a firmware installed
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// let's show a webusb landing page in this case
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usb_init_all((vhdr == NULL && hdr == NULL) ? sectrue : secfalse);
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uint8_t buf[USB_PACKET_SIZE];
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for (;;) {
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#ifdef TREZOR_EMULATOR
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emulator_poll_events();
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#endif
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int r = usb_webusb_read_blocking(USB_IFACE_NUM, buf, USB_PACKET_SIZE,
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USB_TIMEOUT);
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if (r != USB_PACKET_SIZE) {
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continue;
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}
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uint16_t msg_id;
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uint32_t msg_size;
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uint32_t response;
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if (sectrue != msg_parse_header(buf, &msg_id, &msg_size)) {
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// invalid header -> discard
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continue;
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}
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switch (msg_id) {
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case 0: // Initialize
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process_msg_Initialize(USB_IFACE_NUM, msg_size, buf, vhdr, hdr);
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break;
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case 1: // Ping
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process_msg_Ping(USB_IFACE_NUM, msg_size, buf);
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break;
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case 5: // WipeDevice
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response = ui_screen_wipe_confirm();
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if (INPUT_CANCEL == response) {
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send_user_abort(USB_IFACE_NUM, "Wipe cancelled");
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hal_delay(100);
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usb_stop();
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usb_deinit();
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return RETURN;
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}
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ui_screen_wipe();
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r = process_msg_WipeDevice(USB_IFACE_NUM, msg_size, buf);
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if (r < 0) { // error
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screen_wipe_fail();
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hal_delay(100);
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usb_stop();
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usb_deinit();
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return SHUTDOWN;
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} else { // success
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screen_wipe_success();
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hal_delay(100);
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usb_stop();
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usb_deinit();
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return SHUTDOWN;
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}
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break;
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case 6: // FirmwareErase
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process_msg_FirmwareErase(USB_IFACE_NUM, msg_size, buf);
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break;
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case 7: // FirmwareUpload
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r = process_msg_FirmwareUpload(USB_IFACE_NUM, msg_size, buf);
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if (r < 0 && r != UPLOAD_ERR_USER_ABORT) { // error, but not user abort
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ui_screen_fail();
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usb_stop();
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usb_deinit();
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return SHUTDOWN;
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} else if (r == UPLOAD_ERR_USER_ABORT) {
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hal_delay(100);
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usb_stop();
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usb_deinit();
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return RETURN;
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} else if (r == 0) { // last chunk received
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ui_screen_install_progress_upload(1000);
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ui_screen_done(4, sectrue);
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ui_screen_done(3, secfalse);
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hal_delay(1000);
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ui_screen_done(2, secfalse);
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hal_delay(1000);
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ui_screen_done(1, secfalse);
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hal_delay(1000);
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usb_stop();
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usb_deinit();
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ui_screen_boot_empty(true);
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return CONTINUE;
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}
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break;
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case 55: // GetFeatures
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process_msg_GetFeatures(USB_IFACE_NUM, msg_size, buf, vhdr, hdr);
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break;
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default:
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process_msg_unknown(USB_IFACE_NUM, msg_size, buf);
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break;
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}
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}
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}
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secbool check_vendor_header_keys(const vendor_header *const vhdr) {
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return check_vendor_header_sig(vhdr, BOOTLOADER_KEY_M, BOOTLOADER_KEY_N,
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BOOTLOADER_KEYS);
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}
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static secbool check_vendor_header_lock(const vendor_header *const vhdr) {
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uint8_t lock[FLASH_OTP_BLOCK_SIZE];
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ensure(flash_otp_read(FLASH_OTP_BLOCK_VENDOR_HEADER_LOCK, 0, lock,
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FLASH_OTP_BLOCK_SIZE),
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NULL);
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if (0 ==
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memcmp(lock,
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"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF"
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"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF",
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FLASH_OTP_BLOCK_SIZE)) {
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return sectrue;
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}
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uint8_t hash[32];
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vendor_header_hash(vhdr, hash);
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return sectrue * (0 == memcmp(lock, hash, 32));
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}
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// protection against bootloader downgrade
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#if PRODUCTION
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static void check_bootloader_version(void) {
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uint8_t bits[FLASH_OTP_BLOCK_SIZE];
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for (int i = 0; i < FLASH_OTP_BLOCK_SIZE * 8; i++) {
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if (i < VERSION_MONOTONIC) {
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bits[i / 8] &= ~(1 << (7 - (i % 8)));
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} else {
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bits[i / 8] |= (1 << (7 - (i % 8)));
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}
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}
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ensure(flash_otp_write(FLASH_OTP_BLOCK_BOOTLOADER_VERSION, 0, bits,
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FLASH_OTP_BLOCK_SIZE),
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NULL);
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uint8_t bits2[FLASH_OTP_BLOCK_SIZE];
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ensure(flash_otp_read(FLASH_OTP_BLOCK_BOOTLOADER_VERSION, 0, bits2,
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FLASH_OTP_BLOCK_SIZE),
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NULL);
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ensure(sectrue * (0 == memcmp(bits, bits2, FLASH_OTP_BLOCK_SIZE)),
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"Bootloader downgrade protection");
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}
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#endif
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#ifndef TREZOR_EMULATOR
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int main(void) {
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// grab "stay in bootloader" flag as soon as possible
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register uint32_t r11 __asm__("r11");
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volatile uint32_t stay_in_bootloader_flag = r11;
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#else
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int bootloader_main(void) {
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#endif
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random_delays_init();
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// display_init_seq();
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#ifdef USE_DMA2D
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dma2d_init();
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#endif
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display_reinit();
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mpu_config_bootloader();
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const image_header *hdr = NULL;
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vendor_header vhdr;
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// detect whether the device contains a valid firmware
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secbool firmware_present = sectrue;
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if (sectrue != read_vendor_header((const uint8_t *)FIRMWARE_START, &vhdr)) {
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firmware_present = secfalse;
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}
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if (sectrue == firmware_present) {
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firmware_present = check_vendor_header_keys(&vhdr);
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}
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if (sectrue == firmware_present) {
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firmware_present = check_vendor_header_lock(&vhdr);
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}
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if (sectrue == firmware_present) {
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hdr = read_image_header((const uint8_t *)(FIRMWARE_START + vhdr.hdrlen),
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FIRMWARE_IMAGE_MAGIC, FIRMWARE_IMAGE_MAXSIZE);
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if (hdr != (const image_header *)(FIRMWARE_START + vhdr.hdrlen)) {
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firmware_present = secfalse;
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}
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}
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if (sectrue == firmware_present) {
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firmware_present = check_image_model(hdr);
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}
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if (sectrue == firmware_present) {
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firmware_present =
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check_image_header_sig(hdr, vhdr.vsig_m, vhdr.vsig_n, vhdr.vpub);
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}
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if (sectrue == firmware_present) {
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firmware_present =
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check_image_contents(hdr, IMAGE_HEADER_SIZE + vhdr.hdrlen,
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FIRMWARE_SECTORS, FIRMWARE_SECTORS_COUNT);
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}
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#if defined TREZOR_MODEL_T
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set_core_clock(CLOCK_180_MHZ);
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display_set_little_endian();
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#endif
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ui_screen_boot_empty(false);
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#ifdef USE_I2C
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i2c_init();
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#endif
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#ifdef USE_TOUCH
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touch_power_on();
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touch_init();
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#endif
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#ifdef USE_BUTTON
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button_init();
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#endif
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#ifdef USE_RGB_LED
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rgb_led_init();
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#endif
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unit_variant_init();
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#if PRODUCTION
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check_bootloader_version();
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#endif
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// was there reboot with request to stay in bootloader?
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secbool stay_in_bootloader = secfalse;
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if (stay_in_bootloader_flag == STAY_IN_BOOTLOADER_FLAG) {
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stay_in_bootloader = sectrue;
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}
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// delay to detect touch or skip if we know we are staying in bootloader
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// anyway
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uint32_t touched = 0;
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#ifdef USE_TOUCH
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if (firmware_present == sectrue && stay_in_bootloader != sectrue) {
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for (int i = 0; i < 100; i++) {
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touched = touch_is_detected() | touch_read();
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if (touched) {
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break;
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}
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#ifdef TREZOR_EMULATOR
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hal_delay(25);
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#else
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hal_delay(1);
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#endif
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}
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}
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#elif defined USE_BUTTON
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button_read();
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if (button_state_left() == 1) {
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touched = 1;
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}
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#endif
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// start the bootloader if no or broken firmware found ...
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if (firmware_present != sectrue) {
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#ifdef TREZOR_EMULATOR
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// wait a bit so that the empty lock icon is visible
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// (on a real device, we are waiting for touch init which takes longer)
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hal_delay(400);
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#endif
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// ignore stay in bootloader
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stay_in_bootloader = secfalse;
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touched = false;
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// show intro animation
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ui_set_initial_setup(true);
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ui_screen_welcome_model();
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hal_delay(1000);
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ui_screen_welcome();
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// erase storage
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ensure(flash_erase_sectors(STORAGE_SECTORS, STORAGE_SECTORS_COUNT, NULL),
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NULL);
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// and start the usb loop
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if (bootloader_usb_loop(NULL, NULL) != CONTINUE) {
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return 1;
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}
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}
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// ... or if user touched the screen on start
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// ... or we have stay_in_bootloader flag to force it
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if (touched || stay_in_bootloader == sectrue) {
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ui_set_initial_setup(false);
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screen_t screen = SCREEN_INTRO;
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while (true) {
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bool continue_to_firmware = false;
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uint32_t ui_result = 0;
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switch (screen) {
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case SCREEN_INTRO:
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ui_result = ui_screen_intro(&vhdr, hdr);
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if (ui_result == 1) {
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screen = SCREEN_MENU;
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}
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if (ui_result == 2) {
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screen = SCREEN_WAIT_FOR_HOST;
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}
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break;
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case SCREEN_MENU:
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ui_result = ui_screen_menu();
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if (ui_result == 1) { // exit menu
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screen = SCREEN_INTRO;
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}
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if (ui_result == 2) { // reboot
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ui_screen_boot_empty(true);
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continue_to_firmware = true;
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}
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if (ui_result == 3) { // wipe
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screen = SCREEN_WIPE_CONFIRM;
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}
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break;
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case SCREEN_WIPE_CONFIRM:
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ui_result = screen_wipe_confirm();
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if (ui_result == INPUT_CANCEL) {
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// canceled
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screen = SCREEN_MENU;
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}
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if (ui_result == INPUT_CONFIRM) {
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ui_screen_wipe();
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secbool r = bootloader_WipeDevice();
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if (r != sectrue) { // error
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screen_wipe_fail();
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return 1;
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} else { // success
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screen_wipe_success();
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return 1;
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}
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}
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break;
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case SCREEN_WAIT_FOR_HOST:
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screen_connect();
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switch (bootloader_usb_loop(&vhdr, hdr)) {
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case CONTINUE:
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continue_to_firmware = true;
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break;
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case RETURN:
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screen = SCREEN_INTRO;
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break;
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case SHUTDOWN:
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return 1;
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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if (continue_to_firmware) {
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break;
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}
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}
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}
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ensure(read_vendor_header((const uint8_t *)FIRMWARE_START, &vhdr),
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"Firmware is corrupted");
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ensure(check_vendor_header_keys(&vhdr), "Firmware is corrupted");
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ensure(check_vendor_header_lock(&vhdr), "Unauthorized vendor keys");
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hdr = read_image_header((const uint8_t *)(FIRMWARE_START + vhdr.hdrlen),
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FIRMWARE_IMAGE_MAGIC, FIRMWARE_IMAGE_MAXSIZE);
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ensure(hdr == (const image_header *)(FIRMWARE_START + vhdr.hdrlen) ? sectrue
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: secfalse,
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"Firmware is corrupted");
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ensure(check_image_model(hdr), "Wrong firmware model");
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ensure(check_image_header_sig(hdr, vhdr.vsig_m, vhdr.vsig_n, vhdr.vpub),
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"Firmware is corrupted");
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|
ensure(check_image_contents(hdr, IMAGE_HEADER_SIZE + vhdr.hdrlen,
|
|
FIRMWARE_SECTORS, FIRMWARE_SECTORS_COUNT),
|
|
"Firmware is corrupted");
|
|
|
|
// if all VTRUST flags are unset = ultimate trust => skip the procedure
|
|
|
|
if ((vhdr.vtrust & VTRUST_ALL) != VTRUST_ALL) {
|
|
ui_fadeout();
|
|
ui_screen_boot(&vhdr, hdr);
|
|
ui_fadein();
|
|
|
|
int delay = (vhdr.vtrust & VTRUST_WAIT) ^ VTRUST_WAIT;
|
|
if (delay > 1) {
|
|
while (delay > 0) {
|
|
ui_screen_boot_wait(delay);
|
|
hal_delay(1000);
|
|
delay--;
|
|
}
|
|
} else if (delay == 1) {
|
|
hal_delay(1000);
|
|
}
|
|
|
|
if ((vhdr.vtrust & VTRUST_CLICK) == 0) {
|
|
ui_screen_boot_click();
|
|
}
|
|
|
|
ui_screen_boot_empty(false);
|
|
}
|
|
|
|
ensure_compatible_settings();
|
|
|
|
// mpu_config_firmware();
|
|
// jump_to_unprivileged(FIRMWARE_START + vhdr.hdrlen + IMAGE_HEADER_SIZE);
|
|
|
|
mpu_config_off();
|
|
jump_to(FIRMWARE_START + vhdr.hdrlen + IMAGE_HEADER_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void HardFault_Handler(void) { error_shutdown("INTERNAL ERROR", "(HF)"); }
|