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findrpc.py
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import ctypes
import binascii
import struct
import logging
import json
import inspect
import os
from warnings import warn
from collections import namedtuple
from ctypes import Array, Structure, Union, _Pointer, _SimpleCData
from json import JSONEncoder
# IDA libraries
import idaapi
import idc
from PyQt5 import QtCore, QtWidgets, QtGui
# IDA API retrocompatibility
if idaapi.IDA_SDK_VERSION <= 695:
from idaapi import get_segm_qty, getnseg
if idaapi.IDA_SDK_VERSION >= 700:
from ida_segment import get_segm_qty, getnseg
import ida_typeinf
else:
pass
# we can't use ctypes.c_voidp since it rely on Python engine's arch, not the curent PE arch.
POINTER = ( ctypes.c_uint32, ctypes.c_uint64 )[idaapi.get_inf_structure().is_64bit()]
POINTER_SIZE = ctypes.sizeof(POINTER)
READ_PTR_VALUE = (ida_bytes.get_32bit, ida_bytes.get_64bit) [idaapi.get_inf_structure().is_64bit()]
#################################
## ctypes to JSON encoder, copied from https://github.com/rinatz/ctypes_json
class CDataJSONEncoder(JSONEncoder):
def default(self, obj):
if hasattr(obj, "_json_serialize"):
return obj._json_serialize()
if isinstance(obj, (Array, list)):
return [self.default(e) for e in obj]
if isinstance(obj, _Pointer):
return self.default(obj.contents) if obj else None
if isinstance(obj, _SimpleCData):
return self.default(obj.value)
if isinstance(obj, (bool, int, float, str, long)):
return obj
if obj is None:
return obj
if isinstance(obj, (Structure, Union)):
result = {}
anonymous = getattr(obj, '_anonymous_', [])
for key, value in getattr(obj, '_fields_', []):
value = getattr(obj, key)
# private fields don't encode
if key.startswith('_'):
continue
if key in anonymous:
result.update(self.default(value))
else:
result[key] = self.default(value)
return result
return JSONEncoder.default(self, obj)
#################################
## ctypes rpc structures
class RpcStructure(ctypes.Structure):
@classmethod
def get_c_instance_name(cls, name):
""" return a standard name for the extracted C struct instance """
instance_name = getattr(cls, "__instance_name__")
return "{name:s}_{instance:s}".format(
name = name,
instance = instance_name
)
@classmethod
def get_c_instance_pointer(cls, name, address):
""" return a standard name for the extracted C struct instance pointer """
if not address:
return "NULL"
return "&%s" % cls.get_c_instance_name(name)
@classmethod
def generate_format_string_offsets_table(cls, name, fso_ea, handlers_count = 0):
result = ""
# Format string offsets
format_string_offset_pointer = "NULL"
if not fso_ea or not handlers_count:
return format_string_offset_pointer, result
format_string_offset_name = "%s_format_string_offset" % cls.get_c_instance_name(name)
format_string_offset_pointer = "&%s" % format_string_offset_name
offsets = [ ida_bytes.get_word(fso_ea + 2*i) for i in range(handlers_count)]
fso_instance = "static const unsigned short {name:s}[] = {{{values:s}}};".format(
name = format_string_offset_name,
values = ",".join(["0x%04x" % x for x in offsets])
)
result += fso_instance
result += "\n\n"
return format_string_offset_pointer, result
@classmethod
def generate_transfer_syntax_instance(cls, name, transfer_syntax):
result = ""
transfer_syntax_pointer = "NULL"
if not transfer_syntax:
return transfer_syntax_pointer, result
transfer_syntax_struct_name = "%s_transfer_syntax" % cls.get_c_instance_name(name);
transfer_syntax_pointer = "&%s" % transfer_syntax_struct_name
transfer_syntax_struct = "\n".join([
"static const RPC_SYNTAX_IDENTIFIER %s = %s;" % (
transfer_syntax_struct_name,
transfer_syntax.gen_c_struct()
),
"",
""
])
result += transfer_syntax_struct
return transfer_syntax_pointer, result
@classmethod
def generate_proc_string_instance(cls, name, proc_string_ea, bytes_read):
result = ""
proc_string_pointer = "NULL"
if not proc_string_ea:
return proc_string_pointer, result
proc_string_name = "%s_proc_string" % cls.get_c_instance_name(name)
proc_string_pointer = "&%s" % proc_string_name
raw_buffer = [ord(x) for x in ida_bytes.get_bytes(proc_string_ea, bytes_read)]
ps_instance = "static const unsigned char {name:s}[] = {{{values:s}}};".format(
name = proc_string_name,
values = ",".join(["0x%02x" % x for x in raw_buffer])
)
result += ps_instance
result += "\n\n"
return proc_string_pointer, result
class GUID(RpcStructure):
_fields_ = [
('Data1', ctypes.c_uint),
('Data2', ctypes.c_ushort),
('Data3', ctypes.c_ushort),
('Data4', ctypes.c_ubyte * 8),
]
def __eq__(self, other):
return self.Data1 == other.Data1 and \
self.Data2 == other.Data2 and \
self.Data3 == other.Data3 and \
all( x == y for x, y in zip(self.Data4, other.Data4))
def __str__(self):
return "%04x-%02x-%02x-%s" % (
self.Data1,
self.Data2,
self.Data3,
b"".join("%02x" % x for x in self.Data4)
)
def gen_c_struct(self):
return "{0x%x, 0x%x, 0x%x, %s}" % (
self.Data1,
self.Data2,
self.Data3,
"{ %s }" % b", ".join("0x%02x" % x for x in self.Data4)
)
def _json_serialize(self):
"""
Return the GUID in a way Microsoft likes.
"""
return "%08x-%04x-%04x-%04x-%s" % (
self.Data1,
self.Data2,
self.Data3,
self.Data4[0]*256 + self.Data4[1],
b"".join("%02x" % x for x in self.Data4[2:])
)
@classmethod
def from_guid_string(cls, guid_string):
if guid_string.count('-') == 3:
# "%04x-%02x-%02x-%s" GUID style
hexData1, hexData2, hexData3, hexData4 = guid_string.split('-')
Data1 = int(hexData1, 16)
Data2 = int(hexData2, 16)
Data3 = int(hexData3, 16)
Data4 = [int(hexData4[i:i+2], 16) for i in range(0, len(hexData4), 2)]
return cls(Data1, Data2, Data3, (ctypes.c_ubyte*8)(*Data4))
elif guid_string.count('-') == 4:
# "%04x-%02x-%02x-%02x-%s" GUID style
hexData1, hexData2, hexData3, hexData4Hi, hexData4 = guid_string.split('-')
Data4Hi = int(hexData4Hi, 16)
Data1 = int(hexData1, 16)
Data2 = int(hexData2, 16)
Data3 = int(hexData3, 16)
Data4 = [Data4Hi >> 8, Data4Hi & 0xff] + [int(hexData4[i:i+2], 16) for i in range(0, len(hexData4), 2)]
return cls(Data1, Data2, Data3, (ctypes.c_ubyte*8)(*Data4))
else:
raise ValueError("Unrecognized GUID format string : %s" % guid_string)
class RPC_VERSION(RpcStructure):
_fields_ = [
('MajorVersion', ctypes.c_ushort),
('MinorVersion', ctypes.c_ushort),
]
def __str__(self):
return "%d.%d" % (self.MajorVersion, self.MinorVersion)
def gen_c_struct(self):
return "{%d, %d}" % (self.MajorVersion, self.MinorVersion)
def __eq__ (self, other):
return self.MajorVersion == other.MajorVersion and \
self.MinorVersion == other.MinorVersion
class RPC_SYNTAX_IDENTIFIER(RpcStructure):
_fields_ = [
('SyntaxGUID', GUID),
('SyntaxVersion', RPC_VERSION),
]
def __eq__ (self, other):
return self.SyntaxGUID == other.SyntaxGUID and \
self.SyntaxVersion == other.SyntaxVersion
def gen_c_struct(self):
return "{%s, %s}" % (self.SyntaxGUID.gen_c_struct(), self.SyntaxVersion.gen_c_struct())
def __str__(self):
if self == DCE_TransferSyntax:
return "DCE syntax (%s)" % (self.SyntaxVersion)
elif self == NDR64_TransferSyntax:
return "NDR64 syntax (%s)" % (self.SyntaxVersion)
else:
return "%s (%s)" % (self.SyntaxGUID, self.SyntaxVersion)
# Well-known UUID constants
DCE_TransferSyntax = RPC_SYNTAX_IDENTIFIER(GUID.from_guid_string("8A885D04-1CEB-11C9-9FE8-08002B104860"), (2, 0))
NDR64_TransferSyntax = RPC_SYNTAX_IDENTIFIER(GUID.from_guid_string("71710533-BEBA-4937-8319-B5DBEF9CCC36"), (1, 0))
class RPC_SERVER_INTERFACE(RpcStructure):
_pack_ = POINTER_SIZE
_fields_ = [
('Length', ctypes.c_uint),
('InterfaceId', RPC_SYNTAX_IDENTIFIER),
('TransferSyntax', RPC_SYNTAX_IDENTIFIER),
('DispatchTable', POINTER),
('RpcProtseqEndpointCount', ctypes.c_uint),
('RpcProtseqEndpoint', POINTER),
('DefaultManagerEpv', POINTER),
('InterpreterInfo', POINTER),
('Flags', ctypes.c_uint),
]
__instance_name__ = "interface"
def gen_c_struct(self, name, fa, is_client = False):
result = ""
struct_name = ("RPC_SERVER_INTERFACE", "RPC_CLIENT_INTERFACE")[is_client]
dispatch_table_pointer = "NULL"
if self.DispatchTable:
dispatch_table_pointer = "&%s_dispatch_table" % name
interpreter_info_pointer = "NULL"
if self.InterpreterInfo:
interpreter_info_pointer = "&%s_interpreter_info" % name
interface_struct = "\n".join([
"static const %s %s = {" % (struct_name, RPC_SERVER_INTERFACE.get_c_instance_name(name)),
" .Length = sizeof(%s)," % struct_name,
" .InterfaceId = %s," % self.InterfaceId.gen_c_struct(),
" .TransferSyntax = %s," % self.TransferSyntax.gen_c_struct(),
" .DispatchTable = %s," % dispatch_table_pointer,
" .RpcProtseqEndpointCount : %d," % self.RpcProtseqEndpointCount,
" .RpcProtseqEndpoint : NULL, // FIXME", # % self.RpcProtseqEndpoint,
" .DefaultManagerEpv : NULL, // FIXME", # % self.DefaultManagerEpv,
" .InterpreterInfo : %s," % interpreter_info_pointer,
" .Flags : 0x%x" % self.Flags,
"};",
"",
""
])
result += interface_struct
return result
def has_proxy_info(self):
# TODO : 0x6000000 is an undocumented flag indicating that InterpreterInfo
# is a stubless proxy structure, not a fully defined MIDL_SERVER_INFO instance.
# TODO : self.Flags == 0 can also means "inlined" server with no interpretor info
return (self.Flags & 0x2000000) == 0x2000000
def has_interpreter_info(self):
return (self.Flags & 0x4000000) == 0x4000000
def __str__(self):
return "\n".join([
" -Length : %d" % self.Length,
" -InterfaceId : %s" % self.InterfaceId,
" -TransferSyntax : %s" % self.TransferSyntax,
" -DispatchTable : 0x%x" % self.DispatchTable,
" -RpcProtseqEndpointCount : %d" % self.RpcProtseqEndpointCount,
" -RpcProtseqEndpoint : 0x%x" % self.RpcProtseqEndpoint,
" -DefaultManagerEpv : 0x%x" % self.DefaultManagerEpv,
" -InterpreterInfo : 0x%x" % self.InterpreterInfo,
" -Flags : 0x%x" % self.Flags
])
class MIDL_SERVER_INFO(RpcStructure):
_fields_ = [
('pStubDesc', POINTER), # MIDL_STUB_DESC
('DispatchTable', POINTER),
('ProcString', POINTER),
('FmtStringOffset', POINTER),
('ThunkTable', POINTER),
('pTransferSyntax', POINTER),
('nCount', POINTER),
('pSyntaxInfo', POINTER), # MIDL_SYNTAX_INFO
]
__instance_name__ = "interpreter_info"
def __str__(self):
return "\n".join([
" -pStubDesc : 0x%x" % self.pStubDesc,
" -DispatchTable : 0x%x" % self.DispatchTable,
" -ProcString : 0x%x" % self.ProcString,
" -FmtStringOffset : 0x%x" % self.FmtStringOffset,
" -ThunkTable : 0x%x" % self.ThunkTable,
" -pTransferSyntax : 0x%x" % self.pTransferSyntax,
" -nCount : %d" % self.nCount,
" -pSyntaxInfo : 0x%x" % self.pSyntaxInfo,
])
def gen_c_struct(self, name, fa, bytes_read = 0x100):
result = ""
dispatch_table_functions_pointer = "NULL"
query_fa_result = list(filter(lambda r: r.stub_desc.address == self.pStubDesc, fa.results))[0]
proc_handlers_ea = list(query_fa_result.get_proc_handlers())
# Dispatch table
if len(proc_handlers_ea):
# Read dispatch table functions names, or generate fun_xxx if not
rpc_dispatch_functions = [idaapi.get_name(ea) for ea in proc_handlers_ea]
rpc_dispatch_functions = "\n ".join(["%s," % fun for fun in rpc_dispatch_functions])
# generate a function pointer table for it
dispatch_table_functions_instance = "\n".join([
"static const SERVER_ROUTINE %s_routine_table[] = {" % MIDL_SERVER_INFO.get_c_instance_name(name),
" %s" % rpc_dispatch_functions,
" NULL",
"};",
"",
""
])
dispatch_table_functions_pointer = "&%s_routine_table" % MIDL_SERVER_INFO.get_c_instance_name(name)
result += dispatch_table_functions_instance
# Format string offsets
format_string_offset_pointer, fso_instance = MIDL_SERVER_INFO.generate_format_string_offsets_table(name, self.FmtStringOffset, len(proc_handlers_ea))
result += fso_instance
# Proc string
proc_string_pointer, ps_instance = MIDL_SERVER_INFO.generate_proc_string_instance(name, self.ProcString, bytes_read)
result += ps_instance
# transfer syntax
transfer_syntax_object = fa.query_rpc_struct(self.pTransferSyntax)
transfer_syntax_pointer, ts_instance = MIDL_SERVER_INFO.generate_transfer_syntax_instance(name, transfer_syntax_object)
result += ts_instance
midl_server_instance = "\n".join([
"static const MIDL_SERVER_INFO %s = {" % MIDL_SERVER_INFO.get_c_instance_name(name),
" .pStubDesc = {stub_desc:s},".format(stub_desc=MIDL_STUB_DESC.get_c_instance_pointer(name, self.pStubDesc)),
" .DispatchTable = {dp:s},".format(dp = dispatch_table_functions_pointer),
" .FmtStringOffset = %s," % format_string_offset_pointer,
" .ProcString = %s," % proc_string_pointer,
" .ThunkTable = NULL, // FIXME",
" .pTransferSyntax = %s," % transfer_syntax_pointer,
" .nCount={c:d},".format(c = self.nCount),
" .pSyntaxInfo = NULL //FIXME",
"};",
"",
""
])
result += midl_server_instance
return result;
class MIDL_STUBLESS_PROXY_INFO(RpcStructure):
_fields_ = [
('pStubDesc', POINTER), # MIDL_STUB_DESC
('ProcString', POINTER),
('FmtStringOffset', POINTER),
('pTransferSyntax', POINTER),
('nCount', POINTER),
('pSyntaxInfo', POINTER), # MIDL_SYNTAX_INFO
]
__instance_name__ = "interpreter_info"
def __str__(self):
return "\n".join([
" -pStubDesc : 0x%x" % self.pStubDesc,
" -ProcString : 0x%x" % self.ProcString,
" -FmtStringOffset : 0x%x" % self.FmtStringOffset,
" -pTransferSyntax : 0x%x" % self.pTransferSyntax,
" -nCount : %d" % self.nCount,
" -pSyntaxInfo : 0x%x" % self.pSyntaxInfo
])
def gen_c_struct(self, name, fa, bytes_read = None):
result = ""
stub_desc_pointer = MIDL_STUB_DESC.get_c_instance_pointer(name, self.pStubDesc)
# Proc string
proc_string_pointer, ps_instance = MIDL_SERVER_INFO.generate_proc_string_instance(name, self.ProcString, bytes_read)
result += ps_instance
# transfer syntax
transfer_syntax_object = fa.query_rpc_struct(self.pTransferSyntax)
transfer_syntax_pointer, ts_instance = MIDL_SERVER_INFO.generate_transfer_syntax_instance(name, transfer_syntax_object)
result += ts_instance
# we have no way to know how many proc handlers are defined from the client side,
# so we go overboard
format_string_offset_pointer, fso_instance = MIDL_SERVER_INFO.generate_format_string_offsets_table(name, self.FmtStringOffset, bytes_read/2)
result += fso_instance
interpreter_struct = "\n".join([
"static const MIDL_STUBLESS_PROXY_INFO %s_interpreter_info = {" % (name),
" .pStubDesc = %s," % stub_desc_pointer,
" .FmtStringOffset = %s," % format_string_offset_pointer,
" .ProcString = %s," % proc_string_pointer,
" .pTransferSyntax = %s," % transfer_syntax_pointer,
" .nCount = %d," % self.nCount,
" .pSyntaxInfo = NULL, // FIXME", # %
"};",
"",
""
])
result += interpreter_struct
return result
class RPC_DISPATCH_TABLE(RpcStructure):
_pack_ = POINTER_SIZE
_fields_ = [
('DispatchTableCount', ctypes.c_uint),
('DispatchTable', POINTER),
('Reserved', POINTER),
]
__instance_name__ = "dispatch_table"
def __str__(self):
return "\n".join([
" -DispatchTableCount : %d" % self.DispatchTableCount,
" -DispatchTable : 0x%x" % self.DispatchTable
])
def gen_c_struct(self, name, fa):
result = ""
dispatch_table_functions_pointer = "NULL"
if self.DispatchTableCount:
# Read dispatch table functions names (usually NdrServerCall/NdrClientCall or NdrAsyncServerCall/NdrAsyncClientCall)
rpc_dispatch_functions_ea = [ self.DispatchTable + ph_ea*POINTER_SIZE for ph_ea in range(0, self.DispatchTableCount)]
rpc_dispatch_functions = [idaapi.get_name(READ_PTR_VALUE(ea)) for ea in rpc_dispatch_functions_ea]
rpc_dispatch_functions = "\n ".join(["%s," % fun for fun in rpc_dispatch_functions])
# generate a function pointer table for it
dispatch_table_functions_instance = "\n".join([
"static const RPC_DISPATCH_FUNCTION %s_table[] = {" % RPC_DISPATCH_TABLE.get_c_instance_name(name),
" %s" % rpc_dispatch_functions,
" NULL",
"};",
"",
""
])
dispatch_table_functions_pointer = "&%s_table" % RPC_DISPATCH_TABLE.get_c_instance_name(name)
result += dispatch_table_functions_instance
dispatch_table_instance = "\n".join([
"static const RPC_DISPATCH_TABLE {instance:s} = {{".format(instance = RPC_DISPATCH_TABLE.get_c_instance_name(name)),
" .DispatchTableCount = {count:d},".format(count = self.DispatchTableCount),
" .DispatchTable = (RPC_DISPATCH_FUNCTION*) {dispatch_table_ptr:s}".format(dispatch_table_ptr = dispatch_table_functions_pointer),
"};",
"",
""
])
result += dispatch_table_instance
return result
class MIDL_STUB_DESC(RpcStructure):
_pack_ = POINTER_SIZE
_fields_ = [
('RpcInterfaceInformation', POINTER),
('pfnAllocate', POINTER),
('pfnFree', POINTER),
('pAutoHandle', POINTER), # TODO : correctly implement the union
('apfnNdrRundownRoutines', POINTER), # const NDR_RUNDOWN
('aGenericBindingRoutinePairs', POINTER), # const GENERIC_BINDING_ROUTINE_PAIR
('apfnExprEval', POINTER), # const EXPR_EVAL
('aXmitQuintuple', POINTER), # const XMIT_ROUTINE_QUINTUPLE
('pFormatTypes', POINTER), # unsigned char *
('fCheckBounds', ctypes.c_int),
('Version', ctypes.c_ulong),
('pMallocFreeStruct', POINTER), # MALLOC_FREE_STRUCT
('MIDLVersion', ctypes.c_long),
('CommFaultOffsets', POINTER), # const COMM_FAULT_OFFSETS
('aUserMarshalQuadruple', POINTER), # const USER_MARSHAL_ROUTINE_QUADRUPLE
('NotifyRoutineTable', POINTER), # const NDR_NOTIFY_ROUTINE
('mFlags', POINTER),
('CsRoutineTables', POINTER), # const NDR_CS_ROUTINES
('ProxyServerInfo', POINTER),
('pExprInfo', POINTER), # const NDR_EXPR_DESC
]
__instance_name__ = "stub_desc"
def __str__(self):
return "\n".join([
" -RpcInterfaceInformation : 0x%x" % self.RpcInterfaceInformation,
" -pfnAllocate : 0x%x" % self.pfnAllocate,
" -pfnFree : 0x%x" % self.pfnFree,
" -pFormatTypes : 0x%x" % self.pFormatTypes,
" -Version : 0x%x" % self.Version,
" -MIDLVersion : 0x%x" % self.MIDLVersion,
" -mFlags : 0x%x" % self.mFlags,
" -ProxyServerInfo : 0x%x" % self.ProxyServerInfo,
" -pExprInfo : 0x%x" % self.pExprInfo
])
def gen_c_struct(self, name, fa):
return "\n".join([
"static const MIDL_STUB_DESC %s = {" % MIDL_STUB_DESC.get_c_instance_name(name),
" .RpcInterfaceInformation = {interface:s},".format(interface = RPC_SERVER_INTERFACE.get_c_instance_pointer(name, self.RpcInterfaceInformation)),
" .pfnAllocate = MIDL_user_allocate,",
" .pfnFree = MIDL_user_free,",
" // FIXME",
" .fCheckBounds : %d," % self.fCheckBounds,
" .Version : 0x%x," % self.Version,
" // FIXME",
" .MIDLVersion : 0x%x," % self.MIDLVersion,
" // FIXME",
" .mFlags : 0x%x," % self.mFlags,
" // FIXME",
"};",
"",
""
])
class MIDL_SYNTAX_INFO(RpcStructure):
_pack_ = POINTER_SIZE
_fields_ = [
('TransferSyntax', RPC_SYNTAX_IDENTIFIER),
('DispatchTable', POINTER), # RPC_DISPATCH_TABLE
('ProcString', POINTER),
('FmtStringOffset', POINTER),
('TypeString', POINTER),
('aUserMarshalQuadruple', POINTER),
('pMethodProperties', POINTER), # MIDL_INTERFACE_METHOD_PROPERTIES
('pReserved2', POINTER),
]
__instance_name__ = "syntax_info"
def __str__(self):
return "\n".join([
" -TransferSyntax : %s" % self.TransferSyntax,
" -DispatchTable : 0x%x" % self.DispatchTable,
" -ProcString : 0x%x" % self.ProcString,
" -FmtStringOffset : 0x%x" % self.FmtStringOffset
])
def gen_c_struct(self, name, fa):
result += ""
return "\n".join([
"static const MIDL_SYNTAX_INFO %s = {" % MIDL_SYNTAX_INFO.get_c_instance_name(name),
" .TransferSyntax={syntax:s},".format(syntax = self.TransferSyntax.gen_c_struct()),
"};",
"",
""
])
#################################
## results view
# translation between rpc struct type and it's IDA name
TYPE_RPC_SERVER_INTERFACE = "_RPC_SERVER_INTERFACE"
TYPE_MIDL_STUB_DESC = "_MIDL_STUB_DESC"
TYPE_MIDL_SYNTAX_INFO = "_MIDL_SYNTAX_INFO"
TYPE_MIDL_SERVER_INFO = "_MIDL_SERVER_INFO_"
TYPE_MIDL_STUBLESS_PROXY_INFO = "MIDL_STUBLESS_PROXY_INFO"
TYPE_RPC_SYNTAX_IDENTIFIER = "RPC_SYNTAX_IDENTIFIER"
TYPE_RPC_DISPATCH_TABLE = "RPC_DISPATCH_TABLE"
class CancelTypingForm(Form):
s = """ LOL
Hey, this guy wants to cancel its changes.
'Might as well ask for an "undo" button in IDA !
(This joke got stale with IDA 7.3 -_-)
"""
def __init__(self):
Form.__init__(self, CancelTypingForm.s ,{})
class RpcResultsModel(QtCore.QAbstractTableModel):
COL_SYNTAX_GUID = 0x00
COL_RPC_TYPE = 0x01
COL_ADDRESS = 0x02
COL_DESCRIPTION = 0x03
COL_EMPTY = 0x04
SAMPLE_CONTENTS = [
'XXXXXXXX-YYYY-ZZZZ-TTTTTTTTTT',
'MIDL_STUBLESS_PROXY_INFO',
'0xcafebabe',
'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA'
]
def __init__(self, rpc_endpoints, parent=None):
super(RpcResultsModel, self).__init__(parent)
#----------------------------------------------------------------------
# Headers
#----------------------------------------------------------------------
self._column_headers = {
RpcResultsModel.COL_SYNTAX_GUID : 'GUID',
RpcResultsModel.COL_RPC_TYPE : 'Object type',
RpcResultsModel.COL_ADDRESS : 'Address',
RpcResultsModel.COL_DESCRIPTION : 'Description'
}
#----------------------------------------------------------------------
# UI
#----------------------------------------------------------------------
self._font = QtGui.QFont("Monospace")
self._font.setStyleHint(QtGui.QFont.TypeWriter)
#----------------------------------------------------------------------
# Data store
#----------------------------------------------------------------------
self._results = list(rpc_endpoints)
self._row_count = len(self._results)
def flags(self, index):
return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
def rowCount(self, index=QtCore.QModelIndex()):
"""
The number of table rows.
"""
return self._row_count
def columnCount(self, index=QtCore.QModelIndex()):
"""
The number of table columns.
"""
return len(self._column_headers)
def headerData(self, column, orientation, role=QtCore.Qt.DisplayRole):
"""
Define the properties of the the table rows & columns.
"""
if orientation == QtCore.Qt.Horizontal:
# the title of the header columns has been requested
if role == QtCore.Qt.DisplayRole:
try:
return self._column_headers[column]
except KeyError as e:
pass
# the text alignment of the header has beeen requested
elif role == QtCore.Qt.TextAlignmentRole:
# center align all columns
return QtCore.Qt.AlignHCenter
# unhandled header request
return None
def data(self, index, role=QtCore.Qt.DisplayRole):
"""
Define how Qt should access the underlying model data.
"""
# data display request
if role == QtCore.Qt.DisplayRole:
# grab for speed
row = index.row()
column = index.column()
if column == RpcResultsModel.COL_SYNTAX_GUID:
return str(self._results[row].IID.get_syntax_guid())
elif column == RpcResultsModel.COL_RPC_TYPE:
return self._results[row].type
elif column == RpcResultsModel.COL_ADDRESS:
return "0x%x" % self._results[row].address
elif column == RpcResultsModel.COL_DESCRIPTION:
return str(self._results[row])
# font color request
elif role == QtCore.Qt.ForegroundRole:
return QtGui.QColor(QtCore.Qt.black)
# font format request
elif role == QtCore.Qt.FontRole:
return self._font
# text alignment request
elif role == QtCore.Qt.TextAlignmentRole:
column = index.column()
return (
QtCore.Qt.AlignLeft,
QtCore.Qt.AlignLeft,
QtCore.Qt.AlignHCenter,
QtCore.Qt.AlignLeft
)[column]
# unhandeled request, nothing to do
return None
class RpcResultsForm( idaapi.PluginForm ):
def __init__(self, _rpc_endpoints):
super(RpcResultsForm, self).__init__()
self._rpc_endpoints = _rpc_endpoints
def OnCreate(self, form):
"""
Initialize the custom PyQt5 content on form creation.
"""
# Get parent widget
self._widget = self.FormToPyQtWidget(form)
self._init_ui()
def show(self):
"""
Make the created form visible as a tabbed view.
"""
flags = idaapi.PluginForm.WOPN_TAB | idaapi.PluginForm.WOPN_PERSIST
return idaapi.PluginForm.Show(self, "detected rpc strcutures", flags)
def _init_ui(self):
self._font = QtGui.QFont("Monospace")
self._font.setStyleHint(QtGui.QFont.TypeWriter)
self._font_metrics = QtGui.QFontMetricsF(self._font)
self._model = RpcResultsModel(self._rpc_endpoints, self._widget)
self._table = QtWidgets.QTableView()
self._table.setStyleSheet(
"QTableView { gridline-color: white; background-color: white } " +
"QTableView::item:selected { color: grey; background-color: lightblue; } "
)
# set these properties so the user can arbitrarily shrink the table
self._table.setMinimumHeight(0)
self._table.setSizePolicy(
QtWidgets.QSizePolicy.Ignored,
QtWidgets.QSizePolicy.Ignored
)
self._table.setModel(self._model)
# jump to disassembly on table row double click
self._table.doubleClicked.connect(self._ui_entry_double_click)
# right click popup menu
self._table.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
self._table.customContextMenuRequested.connect(self._ui_ctx_menu_handler)
self._action_apply_type = QtWidgets.QAction("Apply type", None)
self._action_clear_type = QtWidgets.QAction("Clear applied type", None)
self._action_rename_struct = QtWidgets.QAction("Renamed applied type", None)
self._action_rename_proc_handlers = QtWidgets.QAction("Renamed proc handlers", None)
# set the initial column widths for the table
self._guess_column_width()
# table selection should be by row, not by cell
self._table.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
# more code-friendly, readable aliases
vh = self._table.verticalHeader()
hh = self._table.horizontalHeader()
vh.setSectionResizeMode(QtWidgets.QHeaderView.Fixed)
# hide the vertical header themselves as we don't need them
vh.hide()
# stretch the last column (which is blank)
hh.setStretchLastSection(True)
# Allow multiline cells
self._table.setWordWrap(True)
self._table.setTextElideMode(QtCore.Qt.ElideMiddle);
self._table.resizeColumnsToContents()
self._table.resizeRowsToContents()
layout = QtWidgets.QGridLayout()
layout.addWidget(self._table)
self._widget.setLayout(layout)
def _guess_column_width(self):
"""
Initial column redimensionning based on "hints" (sample values)
"""
for i in range(len(self._model.__class__.SAMPLE_CONTENTS)):
sample_width = self._font_metrics.boundingRect(self._model.__class__.SAMPLE_CONTENTS[i]).width()
header_width = self._font_metrics.boundingRect(self._model._column_headers[i]).width()
self._table.setColumnWidth(i, max(header_width, sample_width))
def _ui_entry_double_click(self, index):
"""
Handle double click event on the coverage table.
A double click on the coverage table view will jump the user to
the corresponding function in the IDA disassembly view.
"""
idaapi.jumpto(self._model._results[index.row()].address)
def _ui_ctx_menu_handler(self, position):
"""
Handle right click context menu event on the coverage table.
"""
# create a right click menu based on the state and context
ctx_menu = self._populate_ctx_menu()
if not ctx_menu:
return
# show the popup menu to the user, and wait for their selection
action = ctx_menu.exec_(self._table.viewport().mapToGlobal(position))
# process the user action
self._process_ctx_menu_action(action)
def _populate_ctx_menu(self):
"""
Populate a context menu for the table view based on selection.
Returns a populated QMenu, or None.
"""
# get the list rows currently selected in the coverage table
selected_rows = self._table.selectionModel().selectedRows()
if len(selected_rows) == 0:
return None
# the context menu we will dynamically populate
ctx_menu = QtWidgets.QMenu()
ctx_menu.addAction(self._action_apply_type)
ctx_menu.addAction(self._action_clear_type)
ctx_menu.addSeparator()
ctx_menu.addAction(self._action_rename_struct)
if (len(selected_rows) == 1):
item = self._model._results[selected_rows[0].row()]
if item.IID.get_proc_handlers():
ctx_menu.addSeparator()
ctx_menu.addAction(self._action_rename_proc_handlers)
# return the completed context menu
return ctx_menu
def _process_ctx_menu_action(self, action):
"""
Process the given (user selected) context menu action.
"""
# a right click menu action was not clicked. nothing else to do
if not action:
return
# get the list rows currently selected in the coverage table
selected_rows = self._table.selectionModel().selectedRows()
if len(selected_rows) == 0:
return
for row in selected_rows:
row_n = row.row()
result = self._model._results[row_n]
if action == self._action_apply_type:
success = MakeStructEx(result.address, -1, result.type)
print("[findrpc] Applying type %s at address 0x%x : %s" % (result.type, result.address, ("KO", "OK")[success]))
if not success:
warning("Could not apply type via idapython. Do it by hand instead (Alt+Q > %s)" % result.type)
# handle the 'Copy name' action
elif action == self._action_clear_type:
#logging.debug("Clearing applied types to selected lines to item %d" % row_n)
f = CancelTypingForm()
f, args = f.Compile()
ok = f.Execute()
elif action == self._action_rename_struct:
chosen_name = "_findrpc_{iid:s}_{type:s}".format(
iid = str(result.IID.interface.object.InterfaceId.SyntaxGUID).replace('-', '_'),
type = str(result.type).lower()
)
print("[findrpc] renaming address 0x%x to %s" % (result.address, chosen_name))