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usb.py
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usb.py
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#!/usr/bin/env python3
# usb.py
#
# Copyright 2013 Daniel Mende <mail@c0decafe.de>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of the nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import os
import select
import sys
import threading
import traceback
root = os.path.dirname(__file__) or os.getcwd()
sys.path.append(os.path.join(root, "usb"))
del root
from USB import *
from USBDevice import *
from USBConfiguration import *
from USBInterface import *
from USBEndpoint import *
from Facedancer import *
from MAXUSBApp import *
from serial import Serial, PARITY_NONE
from serial.serialutil import SerialException
import tools
DEBUG = False
DEFAULT_TTY = "/dev/ttyUSB0"
class dizzyUSBDevice(USBDevice):
name = "dizzy USB device"
class dizzyUSBInterface(USBInterface):
name = "dizzy USB interface"
def __init__(self, ID, verbose=0):
endpoints = [ USBEndpoint(
ID["EP"].index(i), # endpoint number
################# fill in data from file ################
USBEndpoint.direction_in,
USBEndpoint.transfer_type_interrupt,
USBEndpoint.sync_type_none,
USBEndpoint.usage_type_data,
#########################################################
i["wMaxPacketSize"], # max packet size
i["bInterval"], # polling interval, see USB 2.0 spec Table 9-13
self.handle_buffer_available # handler function
) for i in ID["EP"] ]
USBInterface.__init__(
self,
ID["bInterfaceNumber"], # interface number
ID["bAlternateSetting"], # alternate setting
ID["bInterfaceClass"], # interface class
ID["bInterfaceSubClass"], # subclass
ID["bInterfaceProtocol"], # protocol
ID["iInterface"], # string index
verbose,
endpoints
)
def handle_buffer_available(self):
pass
def __init__(self, maxusb_app, DD, verbose=0, data="", fuzz_dscr=""):
config = [ USBConfiguration(
DD["CD"].index(i), # index
i["iConfiguration_str"], # string desc
[ self.dizzyUSBInterface(j, verbose=verbose)
for j in i["ID"] ] # interfaces
) for i in DD["CD"] ]
USBDevice.__init__(
self,
maxusb_app,
DD["bDeviceClass"], # device class
DD["bDeviceSubClass"], # device subclass
DD["bDeviceProtocol"], # protocol release number
DD["bMaxPacketSize"], # max packet size for endpoint 0
DD["idVendor"], # vendor id
DD["idProduct"], # product id
self.bcd2int(DD["bcdDevice"]), # device revision
DD["iManufacturer_str"], # manufacturer string
DD["iProduct_str"], # product string
DD["iSerial_str"], # serial number string
config,
verbose=verbose
)
for i in DD["CD"]:
for j in i["ID"]:
self.strings.insert(j["iInterface"], j["iInterface_str"])
self.data = data
self.fuzz_dscr = fuzz_dscr
self.dd_sent = False
self.cd_sent = False
self.scr_recieved = False
def bcd2int(self, bcd):
tmp = bcd.split(".")
return (int(tmp[0]) << 8) + int(tmp[1])
def handle_get_descriptor_request(self, req):
dtype = (req.value >> 8) & 0xff
dindex = req.value & 0xff
lang = req.index
n = req.length
response = None
if self.verbose > 2:
print(self.name, ("received GET_DESCRIPTOR req %d, index %d, " \
+ "language 0x%04x, length %d") \
% (dtype, dindex, lang, n))
if dtype == USB.desc_type_device and self.fuzz_dscr == "DD":
response = self.data
elif dtype == USB.desc_type_configuration and self.fuzz_dscr == "CD":
response = self.data
#add IDs and EDs to response!
else:
response = self.descriptors.get(dtype, None)
if callable(response):
response = response(dindex)
if not response is None:
n = min(n, len(response))
self.maxusb_app.verbose += 1
self.maxusb_app.send_on_endpoint(0, response[:n])
self.maxusb_app.verbose -= 1
if self.verbose > 5:
print(self.name, "sent", n, "bytes in response")
else:
self.maxusb_app.stall_ep0()
if n == len(response):
if dtype == USB.desc_type_device:
self.dd_sent = True
elif dtype == USB.desc_type_configuration:
self.cd_sent = True
def handle_set_configuration_request(self, req):
if self.verbose > 2:
print(self.name, "received SET_CONFIGURATION request")
# configs are one-based
self.config_num = req.value - 1
self.configuration = self.configurations[self.config_num]
self.state = USB.state_configured
# collate endpoint numbers
self.endpoints = { }
for i in self.configuration.interfaces:
for e in i.endpoints:
self.endpoints[e.number] = e
# HACK: blindly acknowledge request
self.ack_status_stage()
self.scr_recieved = True
class dizzyUSB(object):
def __init__(self, filename, timeout, device=DEFAULT_TTY, data="", fuzz_dscr=""):
self.filename = filename
self.timeout = timeout
self.device = device
self.data = data
self.fuzz_dscr = fuzz_dscr
self.sp = None
self.d = None
def open(self, dst=""):
if DEBUG:
verbose = 1
else:
verbose = 0
ns = {}
with open(self.filename) as f:
exec(compile(f.read(), self.filename, 'exec'), ns)
DD = ns["DD"]
success = False
if DEBUG:
print("setting up facedancer")
sys.__stdout__.flush()
while not success:
try:
self.sp = Serial(self.device, 115200, parity=PARITY_NONE, timeout=2)
self.fd = Facedancer(self.sp, verbose=verbose)
self.app = MAXUSBApp(self.fd, verbose=verbose)
self.d = dizzyUSBDevice(self.app, DD, verbose, self.data, self.fuzz_dscr)
success = True
except:
time.sleep(0.1)
self.d.connect()
self.t = threading.Thread(target=self.run)
self.ep = None
self.opened = False
if not dst == "":
self.ep = int(dst)
self.t.start()
self.opened = True
if DEBUG:
print("Waiting for USB to setup...")
if self.fuzz_dscr == "":
time.sleep(2)
else:
times = self.timeout
while (not (self.d.dd_sent and self.d.cd_sent and self.d.scr_recieved and False)) and times > 0:
if DEBUG:
sys.__stdout__.write(".")
sys.__stdout__.flush()
time.sleep(0.1)
times -= 1
if DEBUG:
sys.__stdout__.write("\n")
sys.__stdout__.flush()
if times <= 0 and DEBUG:
print("timeout reached, canceled!")
#raise
return
if DEBUG:
print("USB setup complete.")
def run(self):
try:
self.d.run()
except SerialException:
pass
except select.error:
pass
except OSError:
pass
except TypeError:
pass
except IndexError:
pass
except Exception as e:
if DEBUG:
traceback.print_exc()
print(e)
self.opened = False
def close(self):
if not self.open:
return
if not self.d is None:
try:
self.d.disconnect()
except IndexError:
pass
except SerialException:
pass
except ValueError:
pass
except Exception as e:
if DEBUG:
traceback.print_exc()
print(e)
if not self.sp is None:
self.sp.close()
self.open = False
def read(self):
pass
def write(self, data):
if not self.ep is None:
while not self.opened:
time.sleep(0.1)
try:
self.app.send_on_endpoint(self.ep, data)
except Exception as e:
#~ if DEBUG:
#~ traceback.print_exc()
#~ print(e)
raise e