mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-18 12:28:09 +00:00
b4eaf7dbaf
Every 4294967295 milliseconds (2 ^ 32 - 1), system_millis will overflow. This means that every 49.71 days, system_millis will reset to zero. Comparisons like `system_millis < (system_millis + 1)` would fail if the latter had overflown and the former had not. This is non-critical because the worst case is that one second could be skipped or the screen could lock early. This poses no threat to the exponential backoff used for protection against brute force.
438 lines
12 KiB
C
438 lines
12 KiB
C
/*
|
|
* 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 "trezor.h"
|
|
#include "usb.h"
|
|
#include "debug.h"
|
|
#include "messages.h"
|
|
#include "u2f.h"
|
|
#include "storage.h"
|
|
#include "util.h"
|
|
#include "timer.h"
|
|
|
|
#define USB_INTERFACE_INDEX_MAIN 0
|
|
#if DEBUG_LINK
|
|
#define USB_INTERFACE_INDEX_DEBUG 1
|
|
#define USB_INTERFACE_INDEX_U2F 2
|
|
#else
|
|
#define USB_INTERFACE_INDEX_U2F 1
|
|
#endif
|
|
|
|
#define ENDPOINT_ADDRESS_IN (0x81)
|
|
#define ENDPOINT_ADDRESS_OUT (0x01)
|
|
#define ENDPOINT_ADDRESS_DEBUG_IN (0x82)
|
|
#define ENDPOINT_ADDRESS_DEBUG_OUT (0x02)
|
|
#define ENDPOINT_ADDRESS_U2F_IN (0x83)
|
|
#define ENDPOINT_ADDRESS_U2F_OUT (0x03)
|
|
|
|
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,
|
|
};
|
|
|
|
static const uint8_t hid_report_descriptor[] = {
|
|
0x06, 0x00, 0xff, // USAGE_PAGE (Vendor Defined)
|
|
0x09, 0x01, // USAGE (1)
|
|
0xa1, 0x01, // COLLECTION (Application)
|
|
0x09, 0x20, // USAGE (Input Report Data)
|
|
0x15, 0x00, // LOGICAL_MINIMUM (0)
|
|
0x26, 0xff, 0x00, // LOGICAL_MAXIMUM (255)
|
|
0x75, 0x08, // REPORT_SIZE (8)
|
|
0x95, 0x40, // REPORT_COUNT (64)
|
|
0x81, 0x02, // INPUT (Data,Var,Abs)
|
|
0x09, 0x21, // USAGE (Output Report Data)
|
|
0x15, 0x00, // LOGICAL_MINIMUM (0)
|
|
0x26, 0xff, 0x00, // LOGICAL_MAXIMUM (255)
|
|
0x75, 0x08, // REPORT_SIZE (8)
|
|
0x95, 0x40, // REPORT_COUNT (64)
|
|
0x91, 0x02, // OUTPUT (Data,Var,Abs)
|
|
0xc0 // END_COLLECTION
|
|
};
|
|
|
|
static const uint8_t hid_report_descriptor_debug[] = {
|
|
0x06, 0x01, 0xff, // USAGE_PAGE (Vendor Defined)
|
|
0x09, 0x01, // USAGE (1)
|
|
0xa1, 0x01, // COLLECTION (Application)
|
|
0x09, 0x20, // USAGE (Input Report Data)
|
|
0x15, 0x00, // LOGICAL_MINIMUM (0)
|
|
0x26, 0xff, 0x00, // LOGICAL_MAXIMUM (255)
|
|
0x75, 0x08, // REPORT_SIZE (8)
|
|
0x95, 0x40, // REPORT_COUNT (64)
|
|
0x81, 0x02, // INPUT (Data,Var,Abs)
|
|
0x09, 0x21, // USAGE (Output Report Data)
|
|
0x15, 0x00, // LOGICAL_MINIMUM (0)
|
|
0x26, 0xff, 0x00, // LOGICAL_MAXIMUM (255)
|
|
0x75, 0x08, // REPORT_SIZE (8)
|
|
0x95, 0x40, // REPORT_COUNT (64)
|
|
0x91, 0x02, // OUTPUT (Data,Var,Abs)
|
|
0xc0 // END_COLLECTION
|
|
};
|
|
|
|
static const uint8_t hid_report_descriptor_u2f[] = {
|
|
0x06, 0xd0, 0xf1, // USAGE_PAGE (FIDO Alliance)
|
|
0x09, 0x01, // USAGE (U2F HID Authenticator Device)
|
|
0xa1, 0x01, // COLLECTION (Application)
|
|
0x09, 0x20, // USAGE (Input Report Data)
|
|
0x15, 0x00, // LOGICAL_MINIMUM (0)
|
|
0x26,0xff, 0x00, // LOGICAL_MAXIMUM (255)
|
|
0x75,0x08, // REPORT_SIZE (8)
|
|
0x95,0x40, // REPORT_COUNT (64)
|
|
0x81,0x02, // INPUT (Data,Var,Abs)
|
|
0x09,0x21, // USAGE (Output Report Data)
|
|
0x15,0x00, // LOGICAL_MINIMUM (0)
|
|
0x26,0xff, 0x00, // LOGICAL_MAXIMUM (255)
|
|
0x75,0x08, // REPORT_SIZE (8)
|
|
0x95,0x40, // REPORT_COUNT (64)
|
|
0x91,0x02, // OUTPUT (Data,Var,Abs)
|
|
0xc0 // END_COLLECTION
|
|
};
|
|
|
|
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 {
|
|
struct usb_hid_descriptor hid_descriptor_u2f;
|
|
struct {
|
|
uint8_t bReportDescriptorType;
|
|
uint16_t wDescriptorLength;
|
|
} __attribute__((packed)) hid_report_u2f;
|
|
} __attribute__((packed)) hid_function_u2f = {
|
|
.hid_descriptor_u2f = {
|
|
.bLength = sizeof(hid_function_u2f),
|
|
.bDescriptorType = USB_DT_HID,
|
|
.bcdHID = 0x0111,
|
|
.bCountryCode = 0,
|
|
.bNumDescriptors = 1,
|
|
},
|
|
.hid_report_u2f = {
|
|
.bReportDescriptorType = USB_DT_REPORT,
|
|
.wDescriptorLength = sizeof(hid_report_descriptor_u2f),
|
|
}
|
|
};
|
|
|
|
|
|
static const struct usb_endpoint_descriptor hid_endpoints[2] = {{
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
.bEndpointAddress = ENDPOINT_ADDRESS_IN,
|
|
.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
|
|
.wMaxPacketSize = 64,
|
|
.bInterval = 1,
|
|
}, {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
.bEndpointAddress = ENDPOINT_ADDRESS_OUT,
|
|
.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 = USB_INTERFACE_INDEX_MAIN,
|
|
.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_endpoint_descriptor hid_endpoints_u2f[2] = {{
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
.bEndpointAddress = ENDPOINT_ADDRESS_U2F_IN,
|
|
.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
|
|
.wMaxPacketSize = 64,
|
|
.bInterval = 2,
|
|
}, {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
.bEndpointAddress = ENDPOINT_ADDRESS_U2F_OUT,
|
|
.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
|
|
.wMaxPacketSize = 64,
|
|
.bInterval = 2,
|
|
}};
|
|
|
|
static const struct usb_interface_descriptor hid_iface_u2f[] = {{
|
|
.bLength = USB_DT_INTERFACE_SIZE,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
.bInterfaceNumber = USB_INTERFACE_INDEX_U2F,
|
|
.bAlternateSetting = 0,
|
|
.bNumEndpoints = 2,
|
|
.bInterfaceClass = USB_CLASS_HID,
|
|
.bInterfaceSubClass = 0,
|
|
.bInterfaceProtocol = 0,
|
|
.iInterface = 0,
|
|
.endpoint = hid_endpoints_u2f,
|
|
.extra = &hid_function_u2f,
|
|
.extralen = sizeof(hid_function_u2f),
|
|
}};
|
|
|
|
#if DEBUG_LINK
|
|
static const struct usb_endpoint_descriptor hid_endpoints_debug[2] = {{
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
.bEndpointAddress = ENDPOINT_ADDRESS_DEBUG_IN,
|
|
.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
|
|
.wMaxPacketSize = 64,
|
|
.bInterval = 1,
|
|
}, {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
.bEndpointAddress = ENDPOINT_ADDRESS_DEBUG_OUT,
|
|
.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
|
|
.wMaxPacketSize = 64,
|
|
.bInterval = 1,
|
|
}};
|
|
|
|
static const struct usb_interface_descriptor hid_iface_debug[] = {{
|
|
.bLength = USB_DT_INTERFACE_SIZE,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
.bInterfaceNumber = USB_INTERFACE_INDEX_DEBUG,
|
|
.bAlternateSetting = 0,
|
|
.bNumEndpoints = 2,
|
|
.bInterfaceClass = USB_CLASS_HID,
|
|
.bInterfaceSubClass = 0,
|
|
.bInterfaceProtocol = 0,
|
|
.iInterface = 0,
|
|
.endpoint = hid_endpoints_debug,
|
|
.extra = &hid_function,
|
|
.extralen = sizeof(hid_function),
|
|
}};
|
|
#endif
|
|
|
|
static const struct usb_interface ifaces[] = {{
|
|
.num_altsetting = 1,
|
|
.altsetting = hid_iface,
|
|
#if DEBUG_LINK
|
|
}, {
|
|
.num_altsetting = 1,
|
|
.altsetting = hid_iface_debug,
|
|
#endif
|
|
}, {
|
|
.num_altsetting = 1,
|
|
.altsetting = hid_iface_u2f,
|
|
}};
|
|
|
|
static const struct usb_config_descriptor config = {
|
|
.bLength = USB_DT_CONFIGURATION_SIZE,
|
|
.bDescriptorType = USB_DT_CONFIGURATION,
|
|
.wTotalLength = 0,
|
|
#if DEBUG_LINK
|
|
.bNumInterfaces = 3,
|
|
#else
|
|
.bNumInterfaces = 2,
|
|
#endif
|
|
.bConfigurationValue = 1,
|
|
.iConfiguration = 0,
|
|
.bmAttributes = 0x80,
|
|
.bMaxPower = 0x32,
|
|
.interface = ifaces,
|
|
};
|
|
|
|
static const char *usb_strings[] = {
|
|
"SatoshiLabs",
|
|
"TREZOR",
|
|
(const char *)storage_uuid_str,
|
|
};
|
|
|
|
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;
|
|
|
|
if (req->wIndex == USB_INTERFACE_INDEX_U2F) {
|
|
debugLog(0, "", "hid_control_request u2f");
|
|
*buf = (uint8_t *)hid_report_descriptor_u2f;
|
|
*len = sizeof(hid_report_descriptor_u2f);
|
|
return 1;
|
|
}
|
|
|
|
#if DEBUG_LINK
|
|
if (req->wIndex == USB_INTERFACE_INDEX_DEBUG) {
|
|
debugLog(0, "", "hid_control_request debug");
|
|
*buf = (uint8_t *)hid_report_descriptor_debug;
|
|
*len = sizeof(hid_report_descriptor_debug);
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
debugLog(0, "", "hid_control_request main");
|
|
*buf = (uint8_t *)hid_report_descriptor;
|
|
*len = sizeof(hid_report_descriptor);
|
|
return 1;
|
|
}
|
|
|
|
static volatile char tiny = 0;
|
|
|
|
static void hid_rx_callback(usbd_device *dev, uint8_t ep)
|
|
{
|
|
(void)ep;
|
|
static uint8_t buf[64] __attribute__ ((aligned(4)));
|
|
if ( usbd_ep_read_packet(dev, ENDPOINT_ADDRESS_OUT, buf, 64) != 64) return;
|
|
debugLog(0, "", "hid_rx_callback");
|
|
if (!tiny) {
|
|
msg_read(buf, 64);
|
|
} else {
|
|
msg_read_tiny(buf, 64);
|
|
}
|
|
}
|
|
|
|
static void hid_u2f_rx_callback(usbd_device *dev, uint8_t ep)
|
|
{
|
|
(void)ep;
|
|
static uint8_t buf[64] __attribute__ ((aligned(4)));
|
|
|
|
debugLog(0, "", "hid_u2f_rx_callback");
|
|
if ( usbd_ep_read_packet(dev, ENDPOINT_ADDRESS_U2F_OUT, buf, 64) != 64) return;
|
|
u2fhid_read(tiny, (const U2FHID_FRAME *) (void*) buf);
|
|
}
|
|
|
|
#if DEBUG_LINK
|
|
static void hid_debug_rx_callback(usbd_device *dev, uint8_t ep)
|
|
{
|
|
(void)ep;
|
|
static uint8_t buf[64] __attribute__ ((aligned(4)));
|
|
if ( usbd_ep_read_packet(dev, ENDPOINT_ADDRESS_DEBUG_OUT, buf, 64) != 64) return;
|
|
debugLog(0, "", "hid_debug_rx_callback");
|
|
if (!tiny) {
|
|
msg_debug_read(buf, 64);
|
|
} else {
|
|
msg_read_tiny(buf, 64);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static void hid_set_config(usbd_device *dev, uint16_t wValue)
|
|
{
|
|
(void)wValue;
|
|
|
|
usbd_ep_setup(dev, ENDPOINT_ADDRESS_IN, USB_ENDPOINT_ATTR_INTERRUPT, 64, 0);
|
|
usbd_ep_setup(dev, ENDPOINT_ADDRESS_OUT, USB_ENDPOINT_ATTR_INTERRUPT, 64, hid_rx_callback);
|
|
usbd_ep_setup(dev, ENDPOINT_ADDRESS_U2F_IN, USB_ENDPOINT_ATTR_INTERRUPT, 64, 0);
|
|
usbd_ep_setup(dev, ENDPOINT_ADDRESS_U2F_OUT, USB_ENDPOINT_ATTR_INTERRUPT, 64, hid_u2f_rx_callback);
|
|
#if DEBUG_LINK
|
|
usbd_ep_setup(dev, ENDPOINT_ADDRESS_DEBUG_IN, USB_ENDPOINT_ATTR_INTERRUPT, 64, 0);
|
|
usbd_ep_setup(dev, ENDPOINT_ADDRESS_DEBUG_OUT, USB_ENDPOINT_ATTR_INTERRUPT, 64, hid_debug_rx_callback);
|
|
#endif
|
|
|
|
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 usbPoll(void)
|
|
{
|
|
static const uint8_t *data;
|
|
// poll read buffer
|
|
usbd_poll(usbd_dev);
|
|
// write pending data
|
|
data = msg_out_data();
|
|
if (data) {
|
|
while ( usbd_ep_write_packet(usbd_dev, ENDPOINT_ADDRESS_IN, data, 64) != 64 ) {}
|
|
}
|
|
data = u2f_out_data();
|
|
if (data) {
|
|
while ( usbd_ep_write_packet(usbd_dev, ENDPOINT_ADDRESS_U2F_IN, data, 64) != 64 ) {}
|
|
}
|
|
#if DEBUG_LINK
|
|
// write pending debug data
|
|
data = msg_debug_out_data();
|
|
if (data) {
|
|
while ( usbd_ep_write_packet(usbd_dev, ENDPOINT_ADDRESS_DEBUG_IN, data, 64) != 64 ) {}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void usbReconnect(void)
|
|
{
|
|
usbd_disconnect(usbd_dev, 1);
|
|
delay(1000);
|
|
usbd_disconnect(usbd_dev, 0);
|
|
}
|
|
|
|
char usbTiny(char set)
|
|
{
|
|
char old = tiny;
|
|
tiny = set;
|
|
return old;
|
|
}
|
|
|
|
void usbSleep(uint32_t millis)
|
|
{
|
|
uint32_t start = system_millis;
|
|
|
|
while ((system_millis - start) < millis) {
|
|
usbd_poll(usbd_dev);
|
|
}
|
|
}
|