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BadUSB: implement boot protocol (#2496)

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* BadUSB: remove unused out EP
* BadUSB: do not use iad for a single interface
* BadUSB: implement the boot protocol
* BadUSB: implement SET_PROTOCOL
* Improve HID report descriptor readability
* CODEOWNERS update

Co-authored-by: nminaylov <nm29719@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>
This commit is contained in:
Sam Edwards 2023-03-21 08:53:07 -06:00 committed by GitHub
parent ce50b09b28
commit 6089e9210f
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 136 additions and 114 deletions
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3
.github/CODEOWNERS vendored
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@ -44,6 +44,9 @@
/applications/examples/example_thermo/ @skotopes @DrZlo13 @hedger @gsurkov
# Firmware targets
/firmware/ @skotopes @DrZlo13 @hedger @nminaylov
# Assets
/assets/resources/infrared/ @skotopes @DrZlo13 @hedger @gsurkov

121
firmware/targets/f7/furi_hal/furi_hal_usb_hid.c
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@ -8,7 +8,6 @@
#include "usb_hid.h"
#define HID_EP_IN 0x81
#define HID_EP_OUT 0x01
#define HID_EP_SZ 0x10
#define HID_INTERVAL 2
@ -16,17 +15,15 @@
#define HID_VID_DEFAULT 0x046D
#define HID_PID_DEFAULT 0xC529
struct HidIadDescriptor {
struct usb_iad_descriptor hid_iad;
struct HidIntfDescriptor {
struct usb_interface_descriptor hid;
struct usb_hid_descriptor hid_desc;
struct usb_endpoint_descriptor hid_ep_in;
struct usb_endpoint_descriptor hid_ep_out;
};
struct HidConfigDescriptor {
struct usb_config_descriptor config;
struct HidIadDescriptor iad_0;
struct HidIntfDescriptor intf_0;
} __attribute__((packed));
enum HidReportId {
@ -35,12 +32,14 @@ enum HidReportId {
ReportIdConsumer = 3,
};
/* HID report: keyboard+mouse */
/* HID report descriptor: keyboard + mouse + consumer control */
static const uint8_t hid_report_desc[] = {
// clang-format off
HID_USAGE_PAGE(HID_PAGE_DESKTOP),
HID_USAGE(HID_DESKTOP_KEYBOARD),
HID_COLLECTION(HID_APPLICATION_COLLECTION),
HID_REPORT_ID(ReportIdKeyboard),
// Keyboard report
HID_USAGE_PAGE(HID_DESKTOP_KEYPAD),
HID_USAGE_MINIMUM(HID_KEYBOARD_L_CTRL),
HID_USAGE_MAXIMUM(HID_KEYBOARD_R_GUI),
@ -48,16 +47,22 @@ static const uint8_t hid_report_desc[] = {
HID_LOGICAL_MAXIMUM(1),
HID_REPORT_SIZE(1),
HID_REPORT_COUNT(8),
// Input - Modifier keys byte
HID_INPUT(HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE),
HID_REPORT_COUNT(1),
HID_REPORT_SIZE(8),
// Input - Reserved byte
HID_INPUT(HID_IOF_CONSTANT | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE),
HID_USAGE_PAGE(HID_PAGE_LED),
HID_REPORT_COUNT(8),
HID_REPORT_SIZE(1),
HID_USAGE_MINIMUM(1),
HID_USAGE_MAXIMUM(8),
// Output - LEDs
HID_OUTPUT(HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE),
HID_REPORT_COUNT(HID_KB_MAX_KEYS),
HID_REPORT_SIZE(8),
HID_LOGICAL_MINIMUM(0),
@ -65,14 +70,17 @@ static const uint8_t hid_report_desc[] = {
HID_USAGE_PAGE(HID_DESKTOP_KEYPAD),
HID_USAGE_MINIMUM(0),
HID_USAGE_MAXIMUM(101),
// Input - Key codes
HID_INPUT(HID_IOF_DATA | HID_IOF_ARRAY | HID_IOF_ABSOLUTE),
HID_END_COLLECTION,
HID_USAGE_PAGE(HID_PAGE_DESKTOP),
HID_USAGE(HID_DESKTOP_MOUSE),
HID_COLLECTION(HID_APPLICATION_COLLECTION),
HID_USAGE(HID_DESKTOP_POINTER),
HID_COLLECTION(HID_PHYSICAL_COLLECTION),
HID_REPORT_ID(ReportIdMouse),
// Mouse report
HID_USAGE_PAGE(HID_PAGE_BUTTON),
HID_USAGE_MINIMUM(1),
HID_USAGE_MAXIMUM(3),
@ -80,10 +88,14 @@ static const uint8_t hid_report_desc[] = {
HID_LOGICAL_MAXIMUM(1),
HID_REPORT_COUNT(3),
HID_REPORT_SIZE(1),
// Input - Mouse keys
HID_INPUT(HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE),
HID_REPORT_SIZE(1),
HID_REPORT_COUNT(5),
// Input - Mouse keys padding
HID_INPUT(HID_IOF_CONSTANT | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE),
HID_USAGE_PAGE(HID_PAGE_DESKTOP),
HID_USAGE(HID_DESKTOP_X),
HID_USAGE(HID_DESKTOP_Y),
@ -92,21 +104,26 @@ static const uint8_t hid_report_desc[] = {
HID_LOGICAL_MAXIMUM(127),
HID_REPORT_SIZE(8),
HID_REPORT_COUNT(3),
// Input - Mouse movement data (x, y, scroll)
HID_INPUT(HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_RELATIVE),
HID_END_COLLECTION,
HID_END_COLLECTION,
HID_USAGE_PAGE(HID_PAGE_CONSUMER),
HID_USAGE(HID_CONSUMER_CONTROL),
HID_COLLECTION(HID_APPLICATION_COLLECTION),
HID_REPORT_ID(ReportIdConsumer),
// Consumer report
HID_LOGICAL_MINIMUM(0),
HID_RI_LOGICAL_MAXIMUM(16, 0x3FF),
HID_USAGE_MINIMUM(0),
HID_RI_USAGE_MAXIMUM(16, 0x3FF),
HID_REPORT_COUNT(HID_CONSUMER_MAX_KEYS),
HID_REPORT_SIZE(16),
// Input - Consumer control keys
HID_INPUT(HID_IOF_DATA | HID_IOF_ARRAY | HID_IOF_ABSOLUTE),
HID_END_COLLECTION,
// clang-format on
};
/* Device descriptor */
@ -114,9 +131,9 @@ static struct usb_device_descriptor hid_device_desc = {
.bLength = sizeof(struct usb_device_descriptor),
.bDescriptorType = USB_DTYPE_DEVICE,
.bcdUSB = VERSION_BCD(2, 0, 0),
.bDeviceClass = USB_CLASS_IAD,
.bDeviceSubClass = USB_SUBCLASS_IAD,
.bDeviceProtocol = USB_PROTO_IAD,
.bDeviceClass = USB_CLASS_PER_INTERFACE,
.bDeviceSubClass = USB_SUBCLASS_NONE,
.bDeviceProtocol = USB_PROTO_NONE,
.bMaxPacketSize0 = USB_EP0_SIZE,
.idVendor = HID_VID_DEFAULT,
.idProduct = HID_PID_DEFAULT,
@ -140,29 +157,18 @@ static const struct HidConfigDescriptor hid_cfg_desc = {
.bmAttributes = USB_CFG_ATTR_RESERVED | USB_CFG_ATTR_SELFPOWERED,
.bMaxPower = USB_CFG_POWER_MA(100),
},
.iad_0 =
.intf_0 =
{
.hid_iad =
{
.bLength = sizeof(struct usb_iad_descriptor),
.bDescriptorType = USB_DTYPE_INTERFASEASSOC,
.bFirstInterface = 0,
.bInterfaceCount = 1,
.bFunctionClass = USB_CLASS_PER_INTERFACE,
.bFunctionSubClass = USB_SUBCLASS_NONE,
.bFunctionProtocol = USB_PROTO_NONE,
.iFunction = NO_DESCRIPTOR,
},
.hid =
{
.bLength = sizeof(struct usb_interface_descriptor),
.bDescriptorType = USB_DTYPE_INTERFACE,
.bInterfaceNumber = 0,
.bAlternateSetting = 0,
.bNumEndpoints = 2,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = USB_HID_SUBCLASS_NONBOOT,
.bInterfaceProtocol = USB_HID_PROTO_NONBOOT,
.bInterfaceSubClass = USB_HID_SUBCLASS_BOOT,
.bInterfaceProtocol = USB_HID_PROTO_KEYBOARD,
.iInterface = NO_DESCRIPTOR,
},
.hid_desc =
@ -184,15 +190,6 @@ static const struct HidConfigDescriptor hid_cfg_desc = {
.wMaxPacketSize = HID_EP_SZ,
.bInterval = HID_INTERVAL,
},
.hid_ep_out =
{
.bLength = sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = USB_DTYPE_ENDPOINT,
.bEndpointAddress = HID_EP_OUT,
.bmAttributes = USB_EPTYPE_INTERRUPT,
.wMaxPacketSize = HID_EP_SZ,
.bInterval = HID_INTERVAL,
},
},
};
@ -206,9 +203,11 @@ struct HidReportMouse {
struct HidReportKB {
uint8_t report_id;
struct {
uint8_t mods;
uint8_t reserved;
uint8_t btn[HID_KB_MAX_KEYS];
} boot;
} __attribute__((packed));
struct HidReportConsumer {
@ -256,6 +255,7 @@ static bool hid_connected = false;
static HidStateCallback callback;
static void* cb_ctx;
static uint8_t led_state;
static bool boot_protocol = false;
bool furi_hal_hid_is_connected() {
return hid_connected;
@ -280,31 +280,31 @@ void furi_hal_hid_set_state_callback(HidStateCallback cb, void* ctx) {
bool furi_hal_hid_kb_press(uint16_t button) {
for(uint8_t key_nb = 0; key_nb < HID_KB_MAX_KEYS; key_nb++) {
if(hid_report.keyboard.btn[key_nb] == 0) {
hid_report.keyboard.btn[key_nb] = button & 0xFF;
if(hid_report.keyboard.boot.btn[key_nb] == 0) {
hid_report.keyboard.boot.btn[key_nb] = button & 0xFF;
break;
}
}
hid_report.keyboard.mods |= (button >> 8);
hid_report.keyboard.boot.mods |= (button >> 8);
return hid_send_report(ReportIdKeyboard);
}
bool furi_hal_hid_kb_release(uint16_t button) {
for(uint8_t key_nb = 0; key_nb < HID_KB_MAX_KEYS; key_nb++) {
if(hid_report.keyboard.btn[key_nb] == (button & 0xFF)) {
hid_report.keyboard.btn[key_nb] = 0;
if(hid_report.keyboard.boot.btn[key_nb] == (button & 0xFF)) {
hid_report.keyboard.boot.btn[key_nb] = 0;
break;
}
}
hid_report.keyboard.mods &= ~(button >> 8);
hid_report.keyboard.boot.mods &= ~(button >> 8);
return hid_send_report(ReportIdKeyboard);
}
bool furi_hal_hid_kb_release_all() {
for(uint8_t key_nb = 0; key_nb < HID_KB_MAX_KEYS; key_nb++) {
hid_report.keyboard.btn[key_nb] = 0;
hid_report.keyboard.boot.btn[key_nb] = 0;
}
hid_report.keyboard.mods = 0;
hid_report.keyboard.boot.mods = 0;
return hid_send_report(ReportIdKeyboard);
}
@ -434,27 +434,35 @@ static void hid_on_suspend(usbd_device* dev) {
static bool hid_send_report(uint8_t report_id) {
if((hid_semaphore == NULL) || (hid_connected == false)) return false;
if((boot_protocol == true) && (report_id != ReportIdKeyboard)) return false;
furi_check(furi_semaphore_acquire(hid_semaphore, FuriWaitForever) == FuriStatusOk);
if(hid_connected == true) {
if(hid_connected == false) {
return false;
}
if(boot_protocol == true) {
usbd_ep_write(
usb_dev, HID_EP_IN, &hid_report.keyboard.boot, sizeof(hid_report.keyboard.boot));
} else {
if(report_id == ReportIdKeyboard)
usbd_ep_write(usb_dev, HID_EP_IN, &hid_report.keyboard, sizeof(hid_report.keyboard));
else if(report_id == ReportIdMouse)
usbd_ep_write(usb_dev, HID_EP_IN, &hid_report.mouse, sizeof(hid_report.mouse));
else if(report_id == ReportIdConsumer)
usbd_ep_write(usb_dev, HID_EP_IN, &hid_report.consumer, sizeof(hid_report.consumer));
return true;
}
return false;
return true;
}
static void hid_txrx_ep_callback(usbd_device* dev, uint8_t event, uint8_t ep) {
UNUSED(dev);
if(event == usbd_evt_eptx) {
furi_semaphore_release(hid_semaphore);
} else if(boot_protocol == true) {
usbd_ep_read(usb_dev, ep, &led_state, sizeof(led_state));
} else {
struct HidReportLED leds;
usbd_ep_read(usb_dev, ep, &leds, 2);
usbd_ep_read(usb_dev, ep, &leds, sizeof(leds));
led_state = leds.led_state;
}
}
@ -464,18 +472,15 @@ static usbd_respond hid_ep_config(usbd_device* dev, uint8_t cfg) {
switch(cfg) {
case 0:
/* deconfiguring device */
usbd_ep_deconfig(dev, HID_EP_OUT);
usbd_ep_deconfig(dev, HID_EP_IN);
usbd_reg_endpoint(dev, HID_EP_OUT, 0);
usbd_reg_endpoint(dev, HID_EP_IN, 0);
return usbd_ack;
case 1:
/* configuring device */
usbd_ep_config(dev, HID_EP_IN, USB_EPTYPE_INTERRUPT, HID_EP_SZ);
usbd_ep_config(dev, HID_EP_OUT, USB_EPTYPE_INTERRUPT, HID_EP_SZ);
usbd_reg_endpoint(dev, HID_EP_IN, hid_txrx_ep_callback);
usbd_reg_endpoint(dev, HID_EP_OUT, hid_txrx_ep_callback);
usbd_ep_write(dev, HID_EP_IN, 0, 0);
boot_protocol = false; /* BIOS will SET_PROTOCOL if it wants this */
return usbd_ack;
default:
return usbd_fail;
@ -493,8 +498,21 @@ static usbd_respond hid_control(usbd_device* dev, usbd_ctlreq* req, usbd_rqc_cal
case USB_HID_SETIDLE:
return usbd_ack;
case USB_HID_GETREPORT:
if(boot_protocol == true) {
dev->status.data_ptr = &hid_report.keyboard.boot;
dev->status.data_count = sizeof(hid_report.keyboard.boot);
} else {
dev->status.data_ptr = &hid_report;
dev->status.data_count = sizeof(hid_report);
}
return usbd_ack;
case USB_HID_SETPROTOCOL:
if(req->wValue == 0)
boot_protocol = true;
else if(req->wValue == 1)
boot_protocol = false;
else
return usbd_fail;
return usbd_ack;
default:
return usbd_fail;
@ -505,10 +523,11 @@ static usbd_respond hid_control(usbd_device* dev, usbd_ctlreq* req, usbd_rqc_cal
req->wIndex == 0 && req->bRequest == USB_STD_GET_DESCRIPTOR) {
switch(req->wValue >> 8) {
case USB_DTYPE_HID:
dev->status.data_ptr = (uint8_t*)&(hid_cfg_desc.iad_0.hid_desc);
dev->status.data_count = sizeof(hid_cfg_desc.iad_0.hid_desc);
dev->status.data_ptr = (uint8_t*)&(hid_cfg_desc.intf_0.hid_desc);
dev->status.data_count = sizeof(hid_cfg_desc.intf_0.hid_desc);
return usbd_ack;
case USB_DTYPE_HID_REPORT:
boot_protocol = false; /* BIOS does not read this */
dev->status.data_ptr = (uint8_t*)hid_report_desc;
dev->status.data_count = sizeof(hid_report_desc);
return usbd_ack;