mirror of
https://github.com/cemu-project/idapython.git
synced 2024-11-24 18:16:55 +01:00
6b0dfd84c0
- added AUTHORS.txt and changed the banner - IDAPython_ExecFile() will print script execution errors to the log window too - added 'ph' into idaapi. It is a replacement for idaapi.cvar.ph - added runscript to init.py for backward compatibility - added cli_t support
217 lines
7.9 KiB
Python
217 lines
7.9 KiB
Python
# -----------------------------------------------------------------------
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# This is an example illustrating how to use custom data types in Python
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# (c) Hex-Rays
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#
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from idaapi import data_type_t, data_format_t, NW_OPENIDB, NW_CLOSEIDB, NW_TERMIDA, NW_REMOVE, COLSTR
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import struct
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import ctypes
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import platform
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#<pycode(ex_custdata)>
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# -----------------------------------------------------------------------
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class pascal_data_type(data_type_t):
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def __init__(self):
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data_type_t.__init__(self, name="py_pascal_string",
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value_size = 2, menu_name = "Pascal string",
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asm_keyword = "pstr")
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def calc_item_size(self, ea, maxsize):
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# Custom data types may be used in structure definitions. If this case
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# ea is a member id. Check for this situation and return 1
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if _idaapi.is_member_id(ea):
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return 1
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# get the length byte
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n = _idaapi.get_byte(ea)
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# string too big?
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if n > maxsize:
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return 0
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# ok, accept the string
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return n + 1
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class pascal_data_format(data_format_t):
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FORMAT_NAME = "py_pascal_string_pstr"
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def __init__(self):
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data_format_t.__init__(self, name=pascal_data_format.FORMAT_NAME)
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def printf(self, value, current_ea, operand_num, dtid):
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# Take the length byte
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n = ord(value[0])
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o = ['"']
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for ch in value[1:]:
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b = ord(ch)
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if b < 0x20 or b > 128:
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o.append(r'\x%02x' % ord(ch))
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else:
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o.append(ch)
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o.append('"')
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return "".join(o)
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# -----------------------------------------------------------------------
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class simplevm_data_type(data_type_t):
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ASM_KEYWORD = "svm_emit"
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def __init__(self):
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data_type_t.__init__(self,
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name="py_simple_vm",
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value_size = 1,
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menu_name = "SimpleVM",
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asm_keyword = simplevm_data_type.ASM_KEYWORD)
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def calc_item_size(self, ea, maxsize):
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if _idaapi.is_member_id(ea):
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return 1
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# get the opcode and see if it has an imm
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n = 5 if (_idaapi.get_byte(ea) & 3) == 0 else 1
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# string too big?
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if n > maxsize:
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return 0
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# ok, accept
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return n
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class simplevm_data_format(data_format_t):
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def __init__(self):
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data_format_t.__init__(self,
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name="py_simple_vm_format",
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menu_name = "SimpleVM")
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# Some tables for the disassembler
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INST = {1: 'add', 2: 'mul', 3: 'sub', 4: 'xor', 5: 'mov'}
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REGS = {1: 'r1', 2: 'r2', 3: 'r3'}
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def disasm(self, inst):
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"""A simple local disassembler. In reality one can use a full-blown disassembler to render the text"""
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opbyte = ord(inst[0])
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op = opbyte >> 4
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if not (1<=op<=5):
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return None
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r1 = (opbyte & 0xf) >> 2
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r2 = opbyte & 3
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sz = 0
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if r2 == 0:
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if len(inst) != 5:
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return None
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imm = struct.unpack_from('L', inst, 1)[0]
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sz = 5
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else:
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imm = None
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sz = 1
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text = "%s %s, %s" % (
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COLSTR(simplevm_data_format.INST[op], idaapi.SCOLOR_INSN),
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COLSTR(simplevm_data_format.REGS[r1], idaapi.SCOLOR_REG),
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COLSTR("0x%08X" % imm, idaapi.SCOLOR_NUMBER) if imm is not None else COLSTR(simplevm_data_format.REGS[r2], idaapi.SCOLOR_REG))
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return (sz, text)
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def printf(self, value, current_ea, operand_num, dtid):
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r = self.disasm(value)
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if not r:
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return None
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if dtid == 0:
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return "%s(%s)" % (simplevm_data_type.ASM_KEYWORD, r[1])
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return r[1]
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# -----------------------------------------------------------------------
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# This format will display DWORD values as MAKE_DWORD(0xHI, 0xLO)
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class makedword_data_format(data_format_t):
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def __init__(self):
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data_format_t.__init__(self,
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name="py_makedword",
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value_size = 4,
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menu_name = "Make DWORD")
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def printf(self, value, current_ea, operand_num, dtid):
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if len(value) != 4: return None
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w1 = struct.unpack_from("H", value, 0)[0]
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w2 = struct.unpack_from("H", value, 2)[0]
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return "MAKE_DWORD(0x%04X, 0x%04X)" % (w2, w1)
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# -----------------------------------------------------------------------
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# This format will try to load a resource string given a number
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# So instead of displaying:
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# push 66h
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# call message_box_from_rsrc_string
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# It can be rendered as;
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# push RSRC("The message")
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# call message_box_from_rsrc_string
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#
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# The get_rsrc_string() is not optimal since it loads/unloads the
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# DLL each time for a new string. It can be improved in many ways.
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class rsrc_string_format(data_format_t):
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def __init__(self):
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data_format_t.__init__(self,
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name="py_w32rsrcstring",
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value_size = 1,
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menu_name = "Resource string")
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self.cache_node = idaapi.netnode("$ py_w32rsrcstring", 0, 1)
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def get_rsrc_string(self, fn, id):
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"""
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Simple method that loads the input file as a DLL with LOAD_LIBRARY_AS_DATAFILE flag.
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It then tries to LoadString()
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"""
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k32 = ctypes.windll.kernel32
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u32 = ctypes.windll.user32
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hinst = k32.LoadLibraryExA(fn, 0, 0x2)
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if hinst == 0:
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return ""
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buf = ctypes.create_string_buffer(1024)
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r = u32.LoadStringA(hinst, id, buf, 1024-1)
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k32.FreeLibrary(hinst)
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return buf.value if r else ""
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def printf(self, value, current_ea, operand_num, dtid):
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# Is it already cached?
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val = self.cache_node.supval(current_ea)
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# Not cached?
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if val == None:
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# Retrieve it
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num = idaapi.struct_unpack(value)
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val = self.get_rsrc_string(idaapi.get_input_file_path(), num)
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# Cache it
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self.cache_node.supset(current_ea, val)
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# Failed to retrieve?
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if val == "" or val == "\x00":
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return None
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# Return the format
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return "RSRC_STR(\"%s\")" % COLSTR(val, idaapi.SCOLOR_IMPNAME)
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# -----------------------------------------------------------------------
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# Table of formats and types to be registered/unregistered
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# If a tuple has one element then it is the format to be registered with dtid=0
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# If the tuple has more than one element, the tuple[0] is the data type and tuple[1:] are the data formats
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new_formats = [
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(pascal_data_type(), pascal_data_format()),
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(simplevm_data_type(), simplevm_data_format()),
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(makedword_data_format(),),
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(simplevm_data_format(),)
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]
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if platform.system() == 'Windows':
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new_formats.append((rsrc_string_format(),))
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#</pycode(ex_custdata)>
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# -----------------------------------------------------------------------
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def nw_handler(code, old=0):
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# delete notifications
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if code == NW_OPENIDB:
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idaapi.register_data_types_and_formats(new_formats)
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elif code == NW_CLOSEIDB:
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idaapi.unregister_data_types_and_formats(new_formats)
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elif code == NW_TERMIDA:
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idaapi.notify_when(NW_TERMIDA | NW_OPENIDB | NW_CLOSEIDB | NW_REMOVE, nw_handler)
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# -----------------------------------------------------------------------
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# Check if already installed
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if idaapi.find_custom_data_type(pascal_data_format.FORMAT_NAME) == -1:
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if not idaapi.register_data_types_and_formats(new_formats):
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print "Failed to register types!"
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else:
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idaapi.notify_when(NW_TERMIDA | NW_OPENIDB | NW_CLOSEIDB, nw_handler)
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print "Formats installed!"
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else:
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print "Formats already installed!"
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