mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-24 23:38:09 +00:00
110 lines
3.8 KiB
Python
110 lines
3.8 KiB
Python
import os
|
|
|
|
import logger
|
|
import uhid
|
|
|
|
|
|
def random_bytes(length):
|
|
return os.urandom(length)
|
|
|
|
|
|
class HIDInterface:
|
|
uhid_device = "/dev/uhid"
|
|
|
|
def __init__(self):
|
|
self.file_descriptor = os.open(HIDInterface.uhid_device, os.O_RDWR)
|
|
self.create_device()
|
|
|
|
def __uhid_read(self, length):
|
|
data = os.read(self.file_descriptor, length)
|
|
logger.log_raw("{} >".format(HIDInterface.uhid_device), data.hex())
|
|
return data
|
|
|
|
def __uhid_write(self, data):
|
|
bytes_written = os.write(self.file_descriptor, data)
|
|
assert bytes_written == len(data)
|
|
logger.log_raw("{} <".format(HIDInterface.uhid_device), data.hex())
|
|
|
|
def create_device(self):
|
|
name = b"Virtual Trezor"
|
|
phys = b""
|
|
uniq = random_bytes(64)
|
|
bus = 0
|
|
vendor = 0x1209
|
|
product = 0x53C1
|
|
version = 0x0200
|
|
country = 0
|
|
# fmt: off
|
|
rd_data = bytes([
|
|
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
|
|
])
|
|
# fmt: on
|
|
|
|
buf = uhid.create_create2_event(
|
|
name, phys, uniq, bus, vendor, product, version, country, rd_data
|
|
)
|
|
self.__uhid_write(buf)
|
|
logger.log_uhid_event(
|
|
"UHID_CREATE2",
|
|
"name='{}' phys='{}' uniq=0x{} rd_size={} bus=0x{:04x} vendor=0x{:04x} product=0x{:04x} version=0x{:04x} country=0x{:04x} rd_data=0x{}".format(
|
|
name.decode("ascii"),
|
|
phys.decode("ascii"),
|
|
uniq.hex(),
|
|
len(rd_data),
|
|
bus,
|
|
vendor,
|
|
product,
|
|
version,
|
|
country,
|
|
rd_data.hex(),
|
|
),
|
|
)
|
|
|
|
def write_data(self, data):
|
|
buf = uhid.create_input2_event(data)
|
|
self.__uhid_write(buf)
|
|
logger.log_uhid_event(
|
|
"UHID_INPUT2", "data=0x{} size={}".format(data.hex(), len(data))
|
|
)
|
|
logger.log_hid_packet("DEVICE_OUTPUT", "0x{}".format(data.hex()))
|
|
|
|
def process_event(self):
|
|
ev_type, request = uhid.parse_event(self.__uhid_read(uhid.EVENT_LENGTH))
|
|
if ev_type == uhid.EVENT_TYPE_START:
|
|
dev_flags, = request
|
|
logger.log_uhid_event("UHID_START", "dev_flags=0b{:08b}".format(dev_flags))
|
|
elif ev_type == uhid.EVENT_TYPE_STOP:
|
|
logger.log_uhid_event("UHID_STOP")
|
|
elif ev_type == uhid.EVENT_TYPE_OPEN:
|
|
logger.log_uhid_event("UHID_OPEN")
|
|
elif ev_type == uhid.EVENT_TYPE_CLOSE:
|
|
logger.log_uhid_event("UHID_CLOSE")
|
|
elif ev_type == uhid.EVENT_TYPE_OUTPUT:
|
|
data, size, rtype = request
|
|
logger.log_uhid_event(
|
|
"UHID_OUTPUT",
|
|
"data=0x{} size={} rtype={}".format(data.hex(), size, rtype),
|
|
)
|
|
logger.log_hid_packet("DEVICE_INPUT", "0x{}".format(data[1:].hex()))
|
|
return data[1:]
|
|
else:
|
|
logger.log_uhid_event(
|
|
"UNKNOWN_EVENT",
|
|
"ev_type={} request=0x{}".format(ev_type, request.hex()),
|
|
)
|