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trezor-firmware/bootloader/usb.c

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/*
* This file is part of the TREZOR project.
*
* Copyright (C) 2014 Pavol Rusnak <stick@satoshilabs.com>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/usb/usbd.h>
#include <libopencm3/usb/hid.h>
#include <libopencm3/stm32/flash.h>
#include <string.h>
#include "buttons.h"
#include "bootloader.h"
#include "oled.h"
#include "rng.h"
#include "usb.h"
#include "serialno.h"
#include "layout.h"
#include "util.h"
#include "signatures.h"
#include "sha2.h"
static const struct usb_device_descriptor dev_descr = {
.bLength = USB_DT_DEVICE_SIZE,
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = 0x0200,
.bDeviceClass = 0,
.bDeviceSubClass = 0,
.bDeviceProtocol = 0,
.bMaxPacketSize0 = 64,
.idVendor = 0x534c,
.idProduct = 0x0001,
.bcdDevice = 0x0100,
.iManufacturer = 1,
.iProduct = 2,
.iSerialNumber = 3,
.bNumConfigurations = 1,
};
/* got via usbhid-dump from CP2110 */
static const uint8_t hid_report_descriptor[] = {
0x06, 0x00, 0xFF, 0x09, 0x01, 0xA1, 0x01, 0x09, 0x01, 0x75, 0x08, 0x95, 0x40, 0x26, 0xFF, 0x00,
0x15, 0x00, 0x85, 0x01, 0x95, 0x01, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x02,
0x95, 0x02, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x03, 0x95, 0x03, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x04, 0x95, 0x04, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x05, 0x95, 0x05, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x06,
0x95, 0x06, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x07, 0x95, 0x07, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x08, 0x95, 0x08, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x09, 0x95, 0x09, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x0A,
0x95, 0x0A, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x0B, 0x95, 0x0B, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x0C, 0x95, 0x0C, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x0D, 0x95, 0x0D, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x0E,
0x95, 0x0E, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x0F, 0x95, 0x0F, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x10, 0x95, 0x10, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x11, 0x95, 0x11, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x12,
0x95, 0x12, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x13, 0x95, 0x13, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x14, 0x95, 0x14, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x15, 0x95, 0x15, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x16,
0x95, 0x16, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x17, 0x95, 0x17, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x18, 0x95, 0x18, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x19, 0x95, 0x19, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x1A,
0x95, 0x1A, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x1B, 0x95, 0x1B, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x1C, 0x95, 0x1C, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x1D, 0x95, 0x1D, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x1E,
0x95, 0x1E, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x1F, 0x95, 0x1F, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x20, 0x95, 0x20, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x21, 0x95, 0x21, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x22,
0x95, 0x22, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x23, 0x95, 0x23, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x24, 0x95, 0x24, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x25, 0x95, 0x25, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x26,
0x95, 0x26, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x27, 0x95, 0x27, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x28, 0x95, 0x28, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x29, 0x95, 0x29, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x2A,
0x95, 0x2A, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x2B, 0x95, 0x2B, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x2C, 0x95, 0x2C, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x2D, 0x95, 0x2D, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x2E,
0x95, 0x2E, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x2F, 0x95, 0x2F, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x30, 0x95, 0x30, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x31, 0x95, 0x31, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x32,
0x95, 0x32, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x33, 0x95, 0x33, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x34, 0x95, 0x34, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x35, 0x95, 0x35, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x36,
0x95, 0x36, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x37, 0x95, 0x37, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x38, 0x95, 0x38, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x39, 0x95, 0x39, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x3A,
0x95, 0x3A, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x3B, 0x95, 0x3B, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x3C, 0x95, 0x3C, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01,
0x91, 0x02, 0x85, 0x3D, 0x95, 0x3D, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x3E,
0x95, 0x3E, 0x09, 0x01, 0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x3F, 0x95, 0x3F, 0x09, 0x01,
0x81, 0x02, 0x09, 0x01, 0x91, 0x02, 0x85, 0x40, 0x95, 0x01, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x41,
0x95, 0x01, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x42, 0x95, 0x06, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x43,
0x95, 0x01, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x44, 0x95, 0x02, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x45,
0x95, 0x04, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x46, 0x95, 0x02, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x47,
0x95, 0x02, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x50, 0x95, 0x08, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x51,
0x95, 0x01, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x52, 0x95, 0x01, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x60,
0x95, 0x0A, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x61, 0x95, 0x3F, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x62,
0x95, 0x3F, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x63, 0x95, 0x3F, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x64,
0x95, 0x3F, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x65, 0x95, 0x3E, 0x09, 0x01, 0xB1, 0x02, 0x85, 0x66,
0x95, 0x13, 0x09, 0x01, 0xB1, 0x02, 0xC0,
};
static const struct {
struct usb_hid_descriptor hid_descriptor;
struct {
uint8_t bReportDescriptorType;
uint16_t wDescriptorLength;
} __attribute__((packed)) hid_report;
} __attribute__((packed)) hid_function = {
.hid_descriptor = {
.bLength = sizeof(hid_function),
.bDescriptorType = USB_DT_HID,
.bcdHID = 0x0111,
.bCountryCode = 0,
.bNumDescriptors = 1,
},
.hid_report = {
.bReportDescriptorType = USB_DT_REPORT,
.wDescriptorLength = sizeof(hid_report_descriptor),
}
};
static const struct usb_endpoint_descriptor hid_endpoints[2] = {{
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0x81,
.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
.wMaxPacketSize = 64,
.bInterval = 1,
}, {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0x02,
.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
.wMaxPacketSize = 64,
.bInterval = 1,
}};
static const struct usb_interface_descriptor hid_iface[] = {{
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 0,
.bAlternateSetting = 0,
.bNumEndpoints = 2,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = 0,
.bInterfaceProtocol = 0,
.iInterface = 0,
.endpoint = hid_endpoints,
.extra = &hid_function,
.extralen = sizeof(hid_function),
}};
static const struct usb_interface ifaces[] = {{
.num_altsetting = 1,
.altsetting = hid_iface,
}};
static const struct usb_config_descriptor config = {
.bLength = USB_DT_CONFIGURATION_SIZE,
.bDescriptorType = USB_DT_CONFIGURATION,
.wTotalLength = 0,
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.iConfiguration = 0,
.bmAttributes = 0x80,
.bMaxPower = 0x32,
.interface = ifaces,
};
static const char *usb_strings[] = {
"SatoshiLabs",
"TREZOR",
"", // empty serial
};
static int hid_control_request(usbd_device *dev, struct usb_setup_data *req, uint8_t **buf, uint16_t *len, usbd_control_complete_callback *complete)
{
(void)complete;
(void)dev;
if ((req->bmRequestType != 0x81) ||
(req->bRequest != USB_REQ_GET_DESCRIPTOR) ||
(req->wValue != 0x2200)) return 0;
*buf = (uint8_t *)hid_report_descriptor;
*len = sizeof(hid_report_descriptor);
return 1;
}
enum {
STATE_READY,
STATE_OPEN,
STATE_FLASHSTART,
STATE_FLASHING,
STATE_CHECK,
STATE_END,
};
static uint32_t flash_pos = 0, flash_len = 0;
static char flash_state = STATE_READY;
static uint8_t flash_anim = 0;
static uint16_t msg_id = 0xFFFF;
static uint32_t msg_size = 0;
static uint8_t meta_backup[FLASH_META_LEN];
static void send_msg_success(usbd_device *dev)
{
// send response: Success message (id 2), payload len 0
while ( usbd_ep_write_packet(dev, 0x81,
"?##" // header
"\x00\x02" // msg_id
"\x00\x00\x00\x00" // payload_len
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
, 64) != 64) {}
}
static void send_msg_failure(usbd_device *dev)
{
// send response: Failure message (id 3), payload len 2
// code = 99 (Failure_FirmwareError)
while ( usbd_ep_write_packet(dev, 0x81,
"?##" // header
"\x00\x03" // msg_id
"\x00\x00\x00\x02" // payload_len
"\x08\x63" // data
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
, 64) != 64) {}
}
static void send_msg_features(usbd_device *dev)
{
// send response: Features message (id 17), payload len 27
// vendor = "bitcointrezor.com"
// major_version = VERSION_MAJOR
// minor_version = VERSION_MINOR
// patch_version = VERSION_PATCH
// bootloader_mode = True
while ( usbd_ep_write_packet(dev, 0x81,
"?##" // header
"\x00\x11" // msg_id
"\x00\x00\x00\x1b" // payload_len
"\x0a\x11" "bitcointrezor.com\x10" VERSION_MAJOR_CHAR "\x18" VERSION_MINOR_CHAR " " VERSION_PATCH_CHAR "(\x01" // data
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
, 64) != 64) {}
}
static void send_msg_buttonrequest_firmwarecheck(usbd_device *dev)
{
// send response: ButtonRequest message (id 26), payload len 2
// code = ButtonRequest_FirmwareCheck (9)
while ( usbd_ep_write_packet(dev, 0x81,
"?##" // header
"\x00\x1a" // msg_id
"\x00\x00\x00\x02" // payload_len
"\x08\x09" // data
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
, 64) != 64) {}
}
static void hid_rx_callback(usbd_device *dev, uint8_t ep)
{
(void)ep;
static uint8_t buf[64] __attribute__((aligned(4)));
uint8_t *p;
static uint8_t towrite[4] __attribute__((aligned(4)));
static int wi;
int i;
uint32_t *w;
static SHA256_CTX ctx;
if ( usbd_ep_read_packet(dev, 0x02, buf, 64) != 64) return;
if (flash_state == STATE_END) {
return;
}
if (flash_state == STATE_READY || flash_state == STATE_OPEN || flash_state == STATE_FLASHSTART || flash_state == STATE_CHECK) {
if (buf[0] != '?' || buf[1] != '#' || buf[2] != '#') { // invalid start - discard
return;
}
// struct.unpack(">HL") => msg, size
msg_id = (buf[3] << 8) + buf[4];
msg_size = (buf[5] << 24)+ (buf[6] << 16) + (buf[7] << 8) + buf[8];
}
if (flash_state == STATE_READY || flash_state == STATE_OPEN) {
if (msg_id == 0x0000) { // Initialize message (id 0)
send_msg_features(dev);
flash_state = STATE_OPEN;
return;
}
if (msg_id == 0x0001) { // Ping message (id 1)
send_msg_success(dev);
return;
}
}
if (flash_state == STATE_OPEN) {
if (msg_id == 0x0006) { // FirmwareErase message (id 6)
layoutDialog(DIALOG_ICON_QUESTION, "Abort", "Continue", NULL, "Install new", "firmware?", NULL, "Never do this without", "your recovery card!", NULL);
do {
delay(100000);
buttonUpdate();
} while (!button.YesUp && !button.NoUp);
if (button.YesUp) {
layoutProgress("INSTALLING ... Please wait", 0);
// backup metadata
memcpy(meta_backup, (void *)FLASH_META_START, FLASH_META_LEN);
flash_unlock();
// erase metadata area
for (i = FLASH_META_SECTOR_FIRST; i <= FLASH_META_SECTOR_LAST; i++) {
flash_erase_sector(i, FLASH_CR_PROGRAM_X32);
}
// erase code area
for (i = FLASH_CODE_SECTOR_FIRST; i <= FLASH_CODE_SECTOR_LAST; i++) {
flash_erase_sector(i, FLASH_CR_PROGRAM_X32);
}
flash_lock();
send_msg_success(dev);
flash_state = STATE_FLASHSTART;
return;
}
send_msg_failure(dev);
flash_state = STATE_END;
layoutDialog(DIALOG_ICON_WARNING, NULL, NULL, NULL, "Firmware installation", "aborted.", NULL, "You may now", "unplug your TREZOR.", NULL);
return;
}
return;
}
if (flash_state == STATE_FLASHSTART) {
if (msg_id == 0x0007) { // FirmwareUpload message (id 7)
if (buf[9] != 0x0a) { // invalid contents
send_msg_failure(dev);
flash_state = STATE_END;
layoutDialog(DIALOG_ICON_ERROR, NULL, NULL, NULL, "Error installing ", "firmware.", NULL, "Unplug your TREZOR", "and try again.", NULL);
return;
}
// read payload length
p = buf + 10;
flash_len = readprotobufint(&p);
if (flash_len > FLASH_TOTAL_SIZE + FLASH_META_DESC_LEN - (FLASH_APP_START - FLASH_ORIGIN)) { // firmware is too big
send_msg_failure(dev);
flash_state = STATE_END;
layoutDialog(DIALOG_ICON_ERROR, NULL, NULL, NULL, "Firmware is too big.", NULL, "Get official firmware", "from mytrezor.com", NULL, NULL);
return;
}
sha256_Init(&ctx);
flash_state = STATE_FLASHING;
flash_pos = 0;
wi = 0;
flash_unlock();
while (p < buf + 64) {
towrite[wi] = *p;
wi++;
if (wi == 4) {
w = (uint32_t *)towrite;
flash_program_word(FLASH_META_START + flash_pos, *w);
flash_pos += 4;
wi = 0;
}
p++;
}
flash_lock();
return;
}
return;
}
if (flash_state == STATE_FLASHING) {
if (buf[0] != '?') { // invalid contents
send_msg_failure(dev);
flash_state = STATE_END;
layoutDialog(DIALOG_ICON_ERROR, NULL, NULL, NULL, "Error installing ", "firmware.", NULL, "Unplug your TREZOR", "and try again.", NULL);
return;
}
p = buf + 1;
if (flash_anim % 8 == 4) {
layoutProgress("INSTALLING ... Please wait", 1000 * flash_pos / flash_len);
}
flash_anim++;
flash_unlock();
while (p < buf + 64 && flash_pos < flash_len) {
towrite[wi] = *p;
wi++;
if (wi == 4) {
w = (uint32_t *)towrite;
if (flash_pos < FLASH_META_DESC_LEN) {
flash_program_word(FLASH_META_START + flash_pos, *w); // the first 256 bytes of firmware is metadata descriptor
} else {
flash_program_word(FLASH_APP_START + (flash_pos - FLASH_META_DESC_LEN), *w); // the rest is code
sha256_Update(&ctx, towrite, 4);
}
flash_pos += 4;
wi = 0;
}
p++;
}
flash_lock();
// flashing done
if (flash_pos == flash_len) {
flash_state = STATE_CHECK;
send_msg_buttonrequest_firmwarecheck(dev);
}
return;
}
if (flash_state == STATE_CHECK) {
if (msg_id != 0x001B) { // ButtonAck message (id 27)
return;
}
uint8_t hash[32];
sha256_Final(hash, &ctx);
layoutFirmwareHash(hash);
do {
delay(100000);
buttonUpdate();
} while (!button.YesUp && !button.NoUp);
bool hash_check_ok = button.YesUp;
layoutProgress("INSTALLING ... Please wait", 1000);
uint8_t flags = *((uint8_t *)FLASH_META_FLAGS);
// check if to restore old storage area but only if signatures are ok
if ((flags & 0x01) && signatures_ok(NULL)) {
// copy new stuff
memcpy(meta_backup, (void *)FLASH_META_START, FLASH_META_DESC_LEN);
// replace "TRZR" in header with 0000 when hash not confirmed
if (!hash_check_ok) {
meta_backup[0] = 0;
meta_backup[1] = 0;
meta_backup[2] = 0;
meta_backup[3] = 0;
}
flash_unlock();
// erase storage
for (i = FLASH_META_SECTOR_FIRST; i <= FLASH_META_SECTOR_LAST; i++) {
flash_erase_sector(i, FLASH_CR_PROGRAM_X32);
}
// copy it back
for (i = 0; i < FLASH_META_LEN / 4; i++) {
w = (uint32_t *)(meta_backup + i * 4);
flash_program_word(FLASH_META_START + i * 4, *w);
}
flash_lock();
} else {
// replace "TRZR" in header with 0000 when hash not confirmed
if (!hash_check_ok) {
// no need to erase, because we are just erasing bits
flash_unlock();
flash_program_word(FLASH_META_START, 0x00000000);
flash_lock();
}
}
flash_state = STATE_END;
if (hash_check_ok) {
layoutDialog(DIALOG_ICON_OK, NULL, NULL, NULL, "New firmware", "successfully installed.", NULL, "You may now", "unplug your TREZOR.", NULL);
send_msg_success(dev);
} else {
layoutDialog(DIALOG_ICON_WARNING, NULL, NULL, NULL, "Firmware installation", "aborted.", NULL, "You need to repeat", "the procedure with", "the correct firmware.");
send_msg_failure(dev);
}
return;
}
}
static void hid_set_config(usbd_device *dev, uint16_t wValue)
{
(void)wValue;
usbd_ep_setup(dev, 0x81, USB_ENDPOINT_ATTR_INTERRUPT, 64, 0);
usbd_ep_setup(dev, 0x02, USB_ENDPOINT_ATTR_INTERRUPT, 64, hid_rx_callback);
usbd_register_control_callback(
dev,
USB_REQ_TYPE_STANDARD | USB_REQ_TYPE_INTERFACE,
USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
hid_control_request
);
}
static usbd_device *usbd_dev;
static uint8_t usbd_control_buffer[128];
void usbInit(void)
{
usbd_dev = usbd_init(&otgfs_usb_driver, &dev_descr, &config, usb_strings, 3, usbd_control_buffer, sizeof(usbd_control_buffer));
usbd_register_set_config_callback(usbd_dev, hid_set_config);
}
void usbLoop(void)
{
for (;;) {
usbd_poll(usbd_dev);
}
}
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