def markStructFromToolkit(func_ea, structOff, structName):
f = Function.Function(func_ea)
toolkitMovs = FuncAnalyzer.traceRegVar(f.func_ea, f.func_ea + f.getSize(withPool=False), 10, 0)
for trace_ea in toolkitMovs:
# lock into the register in question
insn = Instruction.Insn(trace_ea)
if insn.isComputationalInsn():
regWrites = FuncAnalyzer.traceRegWrites(f.func_ea, f.func_ea + f.getSize(withPool=False),
insn.ops[0].reg)
# TODO: traceRegWrites messes up insn
insn = Instruction.Insn(trace_ea)
# find the relevent register variable to trace
regVarIdx = FuncAnalyzer.getRegWriteIndex(trace_ea, regWrites)
insn = Instruction.Insn(trace_ea)
# trace all reads to this register variable in particular
# print('args', f.func_ea, f.func_ea + f.getSize(withPool=False),
# insn.ops[0].reg, regVarIdx)
toolkitAccesses = FuncAnalyzer.traceRegVar(f.func_ea, f.func_ea + f.getSize(withPool=False),
insn.ops[0].reg, regVarIdx)
# those now will represent all registers R10 moved to, and thus, all of those accesses
# are accesses to the R10 struct
for access in toolkitAccesses:
# now mark with Toolkit enum
accessInsn = Instruction.Insn(access)
if accessInsn.ops[1].type == ida_ua.o_displ:
if accessInsn.ops[1].addr == structOff:
# print(hex(access), idc.GetDisasm(access))
structAcccesses = FuncAnalyzer.traceRegVar(f.func_ea, f.func_ea + f.getSize(withPool=False),
accessInsn.ops[0].reg, regVarIdx+1)
for structAccess in structAcccesses:
# print(hex(structAccess), idc.GetDisasm(structAccess))
idc.op_enum(structAccess, 1, idc.get_enum(structName), 0)
return True
def rename_constant(arg_ea, fct_name, arg_name, arg_enums):
""" Rename constants to values from standard enumerations. """
instruction = idc.print_insn_mnem(arg_ea)
if instruction == 'push':
op_num = 0
elif instruction == 'mov':
op_num = 1
else:
raise RenamingException('Constant: unhandled instruction ' +
instruction)
op_val = idc.get_operand_value(arg_ea, op_num)
# NULL
if op_val == 0:
targetid = idc.get_enum_member_by_name('NULL_{}_{}'.format(
arg_name, fct_name))
serial = 0
enumid = idc.get_enum(NULL_ENUM_NAME)
constid = idc.get_enum_member(enumid, 0, serial, -1)
while constid != idaapi.BADADDR:
if constid == targetid:
idc.op_enum(arg_ea, op_num, enumid, serial)
return
serial = serial + 1
constid = idc.get_enum_member(enumid, 0, serial, -1)
# All other constants
op_type = idc.get_operand_type(arg_ea, op_num)
if op_type == idaapi.o_imm:
# only one choice
if len(arg_enums) == 1:
enumid = idc.get_enum(arg_enums[0])
idc.op_enum(arg_ea, op_num, enumid, 0)
return
for enum in arg_enums:
enumid = idc.get_enum(enum)
constid = get_constant_id(enumid, op_val)
if constid == idaapi.BADADDR:
# Not in this enum
continue
else:
# Found the right enum
idc.op_enum(arg_ea, op_num, enumid, 0)
return
def OpEnum(ea, n, enumid):
return idc.op_enum(ea, n, enumid, 0)
def activate(self, ctx):
# print("ctx.cur_ea : 0x%x" % ctx.cur_ea)
# print("ctx.cur_extracted_ea : 0x%x" % ctx.cur_extracted_ea)
# Extract selected enum
instruction = idc.GetDisasm(ctx.cur_ea)
selection = ctx.cur_extracted_ea
# correctly parse the selected value as int (hex or decimal)
# since ctx.cur_extracted_ea has a bug (IDA always consider
# the selected value as hex)
if instruction.find("{0:X}h".format(selection)) != -1:
# print("hex value found !")
selected_value = ctx.cur_extracted_ea
elif instruction.find("{0:d}".format(selection)) != -1:
# print("int value found !")
selected_value = int("%x" % ctx.cur_extracted_ea)
else:
# print("nothing selected !")
return 1
# next power of two for masking
selected_value_mask = self.shift_bit_length(selected_value) - 1
# print("selected_value : 0x%X" % selected_value)
# print("selected_value mask : 0x%X" % selected_value_mask)
# query magnum db
url = SearchMagicNumber.MAGNUMDB_QUERY.format(
value=selected_value, key=SearchMagicNumber.MAGNUMDB_KEY)
answer = urlopen(url)
results = json.loads(answer.read())
# Let the user select the best answer
c = ChooseMagicNumber(selected_value, results["Items"])
selected_index = c.Show(modal=True)
if selected_index < 0:
return
# Apply the newly found enum
selected_item = results["Items"][selected_index]
selected_name = selected_item["Title"].encode('ascii')
selected_value = int(selected_item["Value"])
# serial is important since several entries can have the same value
entryid, serial = self._manager.add_magnumdb_entry(
selected_name, selected_value)
# locate the operand where to apply the enum
insn = idautils.DecodeInstruction(ctx.cur_ea)
try:
# ida < 7.4
operands = insn.Operands
except AttributeError:
# ida 7.4
operands = insn.ops
for op in filter(lambda o: o.type == idaapi.o_imm, operands):
# heuristic : the selected immediate is the first in the instruction with
# the same exact value (we are using a mask since IDA loves to set FFFFFFFF to high words)
if op.value & selected_value_mask == selected_value:
# Apply the enum
op_enum(ctx.cur_ea, op.n, idaapi.get_enum("_IDA_MAGNUMDB"),
serial)
break
return 1
