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jblitzar
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github-python-corpus

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return None
# Initialize the driver for use with our device
self.handle = self.libk.KUSB_HANDLE(None)
# Passing device_info 'byref'
ret = self.dev.Init(ctypes.byref(self.handle), ctypes.byref(device_info))
if ret == 0:
print('dev.Init(): Error')
return None
return self.dev
def read(self, length):
""" Read using libusbK """
# Create the buffer to store what we read
buffer = ctypes.create_string_buffer(length)
len_transferred = ctypes.c_uint(0)
# Call libusbK's ReadPipe using our specially-crafted function pointer and the opaque device handle
ret = self.dev.ReadPipe(self.handle, ctypes.c_ubyte(0x81), ctypes.addressof(buffer), ctypes.c_uint(length), ctypes.byref(len_transferred), None)
if ret == 0:
raise ctypes.WinError()
return buffer.raw
def write_single_buffer(self, data):
""" Write using libusbK """
# Copy construct to a bytearray so we Know™ what type it is
buffer = bytearray(data)
# Convert wrap the data for use with ctypes
cbuffer = (ctypes.c_ubyte * len(buffer))(*buffer)
len_transferred = ctypes.c_uint(0)
# Call libusbK's WritePipe using our specially-crafted function pointer and the opaque device handle
ret = self.dev.WritePipe(self.handle, ctypes.c_ubyte(0x01), cbuffer, len(data), ctypes.byref(len_transferred), None)
if ret == 0:
raise ctypes.WinError()
def ioctl(self, driver_handle: ctypes.c_void_p, ioctl_code: ctypes.c_ulong, input_bytes: ctypes.c_void_p, input_bytes_count: ctypes.c_size_t, output_bytes: ctypes.c_void_p, output_bytes_count: ctypes.c_size_t):
""" Wrapper for DeviceIoControl """
overlapped = self.libk.OVERLAPPED()
ctypes.memset(ctypes.addressof(overlapped), 0, ctypes.sizeof(overlapped))
ret = ctypes.windll.kernel32.DeviceIoControl(driver_handle, ioctl_code, input_bytes, input_bytes_count, output_bytes, output_bytes_count, None, ctypes.byref(overlapped))
# We expect this to error, which matches the others ^_^
if ret == False:
raise ctypes.WinError()
def trigger_vulnerability(self, length):
"""
Go over libusbK's head and get the master handle it's been using internally
and perform a direct DeviceIoControl call to the kernel to skip the length check
"""
# self.handle is KUSB_HANDLE, cast to KUSB_HANDLE_INTERNAL to transparent-ize it
internal = ctypes.cast(self.handle, ctypes.POINTER(self.libk.KUSB_HANDLE_INTERNAL))
# Get the handle libusbK has been secretly using in its ioctl calls this whole time
master_handle = internal.contents.Device.contents.MasterDeviceHandle
if master_handle is None or master_handle == self.libk.INVALID_HANDLE_VALUE:
raise ValueError("Failed to initialize master handle")
# the raw request struct is pretty annoying, so I'm just going to allocate enough memory and set the few fields I need
raw_request = ctypes.create_string_buffer(self.RAW_REQUEST_STRUCT_SIZE)
# set timeout to 1000 ms, timeout offset is 0 (since it's the first member), and it's an unsigned int
timeout_p = ctypes.cast(raw_request, ctypes.POINTER(ctypes.c_uint))
timeout_p.contents = ctypes.c_ulong(1000) # milliseconds
status_p = ctypes.cast(ctypes.byref(raw_request, 4), ctypes.POINTER(self.libk.status_t))
status_p.contents.index = self.GET_STATUS
status_p.contents.recipient = self.TO_ENDPOINT
buffer = ctypes.create_string_buffer(length)
code = self.win_ctrl_code(self.WINDOWS_FILE_DEVICE_UNKNOWN, self.LIBUSBK_FUNCTION_CODE_GET_STATUS, self.WINDOWS_METHOD_BUFFERED, self.WINDOWS_FILE_ANY_ACCESS)
ret = self.ioctl(master_handle, ctypes.c_ulong(code), raw_request, ctypes.c_size_t(24), buffer, ctypes.c_size_t(length))
if ret == False:
raise ctypes.WinError()
class RCMHax:
# Default to the Nintendo Switch RCM VID and PID.
DEFAULT_VID = 0x0955
DEFAULT_PID = 0x7321
# Exploit specifics
COPY_BUFFER_ADDRESSES = [0x40005000, 0x40009000] # The addresses of the DMA buffers we can trigger a copy _from_.
STACK_END = 0x40010000 # The address just after the end of the device's stack.
def __init__(self, wait_for_device=False, os_override=None, vid=None, pid=None, override_checks=False):
""" Set up our RCM hack connection."""