mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-16 11:28:14 +00:00
270 lines
9.4 KiB
C
270 lines
9.4 KiB
C
#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 "image.h"
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#include "flash.h"
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#include "rng.h"
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#include "touch.h"
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#include "usb.h"
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#include "version.h"
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#include "mini_printf.h"
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#include "messages.h"
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#define IMAGE_MAGIC 0x465A5254 // TRZF
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#define IMAGE_MAXSIZE (7 * 128 * 1024)
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#define BACKLIGHT_NORMAL 150
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void display_fade(int start, int end, int delay)
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{
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for (int i = 0; i < 100; i++) {
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display_backlight(start + i * (end - start) / 100);
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hal_delay(delay / 100);
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}
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display_backlight(end);
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}
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void display_vendor(const uint8_t *vimg, const char *vstr, uint32_t vstr_len, uint32_t fw_version)
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{
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display_clear();
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if (memcmp(vimg, "TOIf", 4) != 0) {
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return;
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}
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uint16_t w = *(uint16_t *)(vimg + 4);
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uint16_t h = *(uint16_t *)(vimg + 6);
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if (w != 120 || h != 120) {
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return;
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}
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uint32_t datalen = *(uint32_t *)(vimg + 8);
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display_image(60, 32, w, h, vimg + 12, datalen);
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display_text_center(120, 192, vstr, vstr_len, FONT_BOLD, COLOR_WHITE, COLOR_BLACK);
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char ver_str[32];
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mini_snprintf(ver_str, sizeof(ver_str), "%d.%d.%d.%d",
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(int)(fw_version & 0xFF),
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(int)((fw_version >> 8) & 0xFF),
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(int)((fw_version >> 16) & 0xFF),
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(int)((fw_version >> 24) & 0xFF)
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);
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display_text_center(120, 215, ver_str, -1, FONT_BOLD, COLOR_GRAY128, COLOR_BLACK);
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display_refresh();
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}
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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 PRODUCTION
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(const uint8_t *)"\xc2\xc8\x7a\x49\xc5\xa3\x46\x09\x77\xfb\xb2\xec\x9d\xfe\x60\xf0\x6b\xd6\x94\xdb\x82\x44\xbd\x49\x81\xfe\x3b\x7a\x26\x30\x7f\x3f",
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(const uint8_t *)"\x80\xd0\x36\xb0\x87\x39\xb8\x46\xf4\xcb\x77\x59\x30\x78\xde\xb2\x5d\xc9\x48\x7a\xed\xcf\x52\xe3\x0b\x4f\xb7\xcd\x70\x24\x17\x8a",
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(const uint8_t *)"\xb8\x30\x7a\x71\xf5\x52\xc6\x0a\x4c\xbb\x31\x7f\xf4\x8b\x82\xcd\xbf\x6b\x6b\xb5\xf0\x4c\x92\x0f\xec\x7b\xad\xf0\x17\x88\x37\x51",
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#else
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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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#endif
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};
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int usb_init_all(void) {
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static const usb_dev_info_t dev_info = {
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.vendor_id = 0x1209,
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.product_id = 0x53C0,
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.release_num = 0x0002,
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.manufacturer = (const uint8_t *)"SatoshiLabs",
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.product = (const uint8_t *)"TREZOR Bootloader",
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.serial_number = (const uint8_t *)"",
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};
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static uint8_t hid_rx_buffer[USB_PACKET_SIZE];
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static const uint8_t hid_report_desc[] = {
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0x06, 0x00, 0xff, // USAGE_PAGE (Vendor Defined)
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0x09, 0x01, // USAGE (1)
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0xa1, 0x01, // COLLECTION (Application)
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0x09, 0x20, // USAGE (Input Report Data)
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0x15, 0x00, // LOGICAL_MINIMUM (0)
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0x26, 0xff, 0x00, // LOGICAL_MAXIMUM (255)
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0x75, 0x08, // REPORT_SIZE (8)
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0x95, 0x40, // REPORT_COUNT (64)
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0x81, 0x02, // INPUT (Data,Var,Abs)
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0x09, 0x21, // USAGE (Output Report Data)
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0x15, 0x00, // LOGICAL_MINIMUM (0)
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0x26, 0xff, 0x00, // LOGICAL_MAXIMUM (255)
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0x75, 0x08, // REPORT_SIZE (8)
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0x95, 0x40, // REPORT_COUNT (64)
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0x91, 0x02, // OUTPUT (Data,Var,Abs)
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0xc0 // END_COLLECTION
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};
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static const usb_hid_info_t hid_info = {
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.iface_num = USB_IFACE_NUM,
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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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.subclass = 0,
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.protocol = 0,
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.max_packet_len = sizeof(hid_rx_buffer),
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.rx_buffer = hid_rx_buffer,
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.polling_interval = 1,
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.report_desc_len = sizeof(hid_report_desc),
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.report_desc = hid_report_desc,
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};
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ensure(0 == usb_init(&dev_info), NULL);
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ensure(0 == usb_hid_add(&hid_info), NULL);
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ensure(0 == usb_start(), NULL);
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return 0;
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}
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void bootloader_loop(void)
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{
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ensure(0 == flash_init(), NULL);
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ensure(0 == usb_init_all(), NULL);
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display_clear();
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display_text_center(120, 30, "TREZOR Bootloader", -1, FONT_BOLD, COLOR_WHITE, COLOR_BLACK);
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display_fade(0, BACKLIGHT_NORMAL, 1000);
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uint8_t buf[USB_PACKET_SIZE];
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for (;;) {
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int r = usb_hid_read_blocking(USB_IFACE_NUM, buf, USB_PACKET_SIZE, 100);
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if (r != USB_PACKET_SIZE) {
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continue;
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}
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ensure(r == USB_PACKET_SIZE, NULL);
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uint16_t msg_id;
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uint32_t msg_size;
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if (!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);
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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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display_clear();
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display_text_center(120, 30, "Wiping Device", -1, FONT_BOLD, COLOR_WHITE, COLOR_BLACK);
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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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display_clear();
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display_text_center(120, 30, "Error", -1, FONT_BOLD, COLOR_RED, COLOR_BLACK);
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display_loader(1000, 0, COLOR_RED, COLOR_BLACK, 0, 0, 0);
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} else { // success
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display_clear();
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display_text_center(120, 30, "Done", -1, FONT_BOLD, COLOR_GREEN, COLOR_BLACK);
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display_loader(1000, 0, COLOR_GREEN, COLOR_BLACK, 0, 0, 0);
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}
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break;
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case 6: // FirmwareErase
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display_clear();
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display_text_center(120, 30, "Updating Firmware", -1, FONT_BOLD, COLOR_WHITE, COLOR_BLACK);
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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) { // error
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display_clear();
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display_text_center(120, 30, "Error", -1, FONT_BOLD, COLOR_RED, COLOR_BLACK);
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display_loader(1000, 0, COLOR_RED, COLOR_BLACK, 0, 0, 0);
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} else
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if (r == 0) { // last chunk received
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display_clear();
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display_text_center(120, 30, "Done", -1, FONT_BOLD, COLOR_GREEN, COLOR_BLACK);
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display_loader(1000, 0, COLOR_GREEN, COLOR_BLACK, 0, 0, 0);
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}
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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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// protection against bootloader downgrade
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#define BOOTLOADER_VERSION_OTP_BLOCK 1
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void check_bootloader_version(void)
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{
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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(true == flash_otp_write(BOOTLOADER_VERSION_OTP_BLOCK, 0, bits, FLASH_OTP_BLOCK_SIZE), NULL);
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uint8_t bits2[FLASH_OTP_BLOCK_SIZE];
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ensure(true == flash_otp_read(BOOTLOADER_VERSION_OTP_BLOCK, 0, bits2, FLASH_OTP_BLOCK_SIZE), NULL);
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ensure(0 == memcmp(bits, bits2, FLASH_OTP_BLOCK_SIZE), "Bootloader downgraded");
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}
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int main(void)
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{
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#if PRODUCTION
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check_bootloader_version();
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#endif
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periph_init();
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display_orientation(0);
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ensure(0 == touch_init(), NULL);
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// delay to detect touch
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hal_delay(100);
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bool touched = false;
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// flush touch events
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while (touch_read()) {
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touched = true;
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}
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// start the bootloader if user touched the screen or no firmware installed
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if (touched || !vendor_parse_header((const uint8_t *)FIRMWARE_START, NULL)) {
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bootloader_loop();
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shutdown();
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}
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vendor_header vhdr;
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ensure(
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vendor_parse_header((const uint8_t *)FIRMWARE_START, &vhdr),
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"invalid vendor header");
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ensure(
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vendor_check_signature((const uint8_t *)FIRMWARE_START, &vhdr, BOOTLOADER_KEY_M, BOOTLOADER_KEY_N, BOOTLOADER_KEYS),
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"invalid vendor header signature");
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image_header hdr;
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ensure(
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image_parse_header((const uint8_t *)(FIRMWARE_START + vhdr.hdrlen), IMAGE_MAGIC, IMAGE_MAXSIZE, &hdr),
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"invalid firmware header");
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ensure(
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image_check_signature((const uint8_t *)(FIRMWARE_START + vhdr.hdrlen), &hdr, vhdr.vsig_m, vhdr.vsig_n, vhdr.vpub),
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"invalid firmware signature");
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display_vendor(vhdr.vimg, (const char *)vhdr.vstr, vhdr.vstr_len, hdr.version);
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display_fade(0, BACKLIGHT_NORMAL, 1000);
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if (vhdr.vtrust < 50) {
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display_text_center(120, 238, "click to continue ...", -1, FONT_BOLD, COLOR_GRAY64, COLOR_BLACK);
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touch_click();
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} else {
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hal_delay(1000);
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}
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display_fade(BACKLIGHT_NORMAL, 0, 500);
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display_clear();
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jump_to(FIRMWARE_START + vhdr.hdrlen + HEADER_SIZE);
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return 0;
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}
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