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pe.py
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pe.py
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"""
Copyright Joey Payne All Rights Reserved
"""
import os
import struct
from io import BytesIO
from PIL import Image
def resize(image, size, format=None):
output = BytesIO()
back = Image.new("RGBA", size, (0, 0, 0, 0))
if image.size[0] < size[0] or image.size[1] < size[1]:
if image.height > image.width:
factor = size[0] / image.height
else:
factor = size[1] / image.width
image = image.resize(
(int(image.width * factor), int(image.height * factor)), Image.ANTIALIAS
)
else:
image.thumbnail(size, Image.ANTIALIAS)
offset = [0, 0]
if image.size[0] > image.size[1]:
offset[1] = int(back.size[1] / 2 - image.size[1] / 2)
elif image.size[0] < image.size[1]:
offset[0] = int(back.size[0] / 2 - image.size[0] / 2)
else:
offset[0] = int(back.size[0] / 2 - image.size[0] / 2)
offset[1] = int(back.size[1] / 2 - image.size[1] / 2)
back.paste(image, tuple(offset))
format = format or image.format
back.save(output, format, sizes=[size])
contents = output.getvalue()
output.close()
return contents
struct_symbols = {
1: "B", # byte
2: "H", # word
4: "L", # long word
8: "Q", # double long word
}
endian_symbols = {"little": "<", "big": ">"}
name_dictionary = {
"PEHeader_Machine": {
0: "IMAGE_FILE_MACHINE_UNKNOWN",
0x014C: "IMAGE_FILE_MACHINE_I386",
0x0162: "IMAGE_FILE_MACHINE_R3000",
0x0166: "IMAGE_FILE_MACHINE_R4000",
0x0168: "IMAGE_FILE_MACHINE_R10000",
0x0169: "IMAGE_FILE_MACHINE_WCEMIPSV2",
0x0184: "IMAGE_FILE_MACHINE_ALPHA",
0x01A2: "IMAGE_FILE_MACHINE_SH3",
0x01A3: "IMAGE_FILE_MACHINE_SH3DSP",
0x01A4: "IMAGE_FILE_MACHINE_SH3E",
0x01A6: "IMAGE_FILE_MACHINE_SH4",
0x01A8: "IMAGE_FILE_MACHINE_SH5",
0x01C0: "IMAGE_FILE_MACHINE_ARM",
0x01C2: "IMAGE_FILE_MACHINE_THUMB",
0x01C4: "IMAGE_FILE_MACHINE_ARMNT",
0x01D3: "IMAGE_FILE_MACHINE_AM33",
0x01F0: "IMAGE_FILE_MACHINE_POWERPC",
0x01F1: "IMAGE_FILE_MACHINE_POWERPCFP",
0x0200: "IMAGE_FILE_MACHINE_IA64",
0x0266: "IMAGE_FILE_MACHINE_MIPS16",
0x0284: "IMAGE_FILE_MACHINE_ALPHA64",
0x0284: "IMAGE_FILE_MACHINE_AXP64", # same
0x0366: "IMAGE_FILE_MACHINE_MIPSFPU",
0x0466: "IMAGE_FILE_MACHINE_MIPSFPU16",
0x0520: "IMAGE_FILE_MACHINE_TRICORE",
0x0CEF: "IMAGE_FILE_MACHINE_CEF",
0x0EBC: "IMAGE_FILE_MACHINE_EBC",
0x8664: "IMAGE_FILE_MACHINE_AMD64",
0x9041: "IMAGE_FILE_MACHINE_M32R",
0xC0EE: "IMAGE_FILE_MACHINE_CEE",
},
"PEHeader_Characteristics": {
0x0001: "IMAGE_FILE_RELOCS_STRIPPED",
0x0002: "IMAGE_FILE_EXECUTABLE_IMAGE",
0x0004: "IMAGE_FILE_LINE_NUMS_STRIPPED",
0x0008: "IMAGE_FILE_LOCAL_SYMS_STRIPPED",
0x0010: "IMAGE_FILE_AGGRESIVE_WS_TRIM",
0x0020: "IMAGE_FILE_LARGE_ADDRESS_AWARE",
0x0040: "IMAGE_FILE_16BIT_MACHINE",
0x0080: "IMAGE_FILE_BYTES_REVERSED_LO",
0x0100: "IMAGE_FILE_32BIT_MACHINE",
0x0200: "IMAGE_FILE_DEBUG_STRIPPED",
0x0400: "IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP",
0x0800: "IMAGE_FILE_NET_RUN_FROM_SWAP",
0x1000: "IMAGE_FILE_SYSTEM",
0x2000: "IMAGE_FILE_DLL",
0x4000: "IMAGE_FILE_UP_SYSTEM_ONLY",
0x8000: "IMAGE_FILE_BYTES_REVERSED_HI",
},
"OptionalHeader_Subsystem": {
0: "IMAGE_SUBSYSTEM_UNKNOWN",
1: "IMAGE_SUBSYSTEM_NATIVE",
2: "IMAGE_SUBSYSTEM_WINDOWS_GUI",
3: "IMAGE_SUBSYSTEM_WINDOWS_CUI",
5: "IMAGE_SUBSYSTEM_OS2_CUI",
7: "IMAGE_SUBSYSTEM_POSIX_CUI",
8: "IMAGE_SUBSYSTEM_NATIVE_WINDOWS",
9: "IMAGE_SUBSYSTEM_WINDOWS_CE_GUI",
10: "IMAGE_SUBSYSTEM_EFI_APPLICATION",
11: "IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER",
12: "IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER",
13: "IMAGE_SUBSYSTEM_EFI_ROM",
14: "IMAGE_SUBSYSTEM_XBOX",
16: "IMAGE_SUBSYSTEM_WINDOWS_BOOT_APPLICATION",
},
"OptionalHeader_DLL_Characteristics": {
0x0001: "IMAGE_LIBRARY_PROCESS_INIT", # reserved
0x0002: "IMAGE_LIBRARY_PROCESS_TERM", # reserved
0x0004: "IMAGE_LIBRARY_THREAD_INIT", # reserved
0x0008: "IMAGE_LIBRARY_THREAD_TERM", # reserved
0x0020: "IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA",
0x0040: "IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE",
0x0080: "IMAGE_DLLCHARACTERISTICS_FORCE_INTEGRITY",
0x0100: "IMAGE_DLLCHARACTERISTICS_NX_COMPAT",
0x0200: "IMAGE_DLLCHARACTERISTICS_NO_ISOLATION",
0x0400: "IMAGE_DLLCHARACTERISTICS_NO_SEH",
0x0800: "IMAGE_DLLCHARACTERISTICS_NO_BIND",
0x1000: "IMAGE_DLLCHARACTERISTICS_APPCONTAINER",
0x2000: "IMAGE_DLLCHARACTERISTICS_WDM_DRIVER",
0x4000: "IMAGE_DLLCHARACTERISTICS_GUARD_CF",
0x8000: "IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE",
},
"SectionHeader_Characteristics": {
0x00000000: "IMAGE_SCN_TYPE_REG", # reserved
0x00000001: "IMAGE_SCN_TYPE_DSECT", # reserved
0x00000002: "IMAGE_SCN_TYPE_NOLOAD", # reserved
0x00000004: "IMAGE_SCN_TYPE_GROUP", # reserved
0x00000008: "IMAGE_SCN_TYPE_NO_PAD", # reserved
0x00000010: "IMAGE_SCN_TYPE_COPY", # reserved
0x00000020: "IMAGE_SCN_CNT_CODE",
0x00000040: "IMAGE_SCN_CNT_INITIALIZED_DATA",
0x00000080: "IMAGE_SCN_CNT_UNINITIALIZED_DATA",
0x00000100: "IMAGE_SCN_LNK_OTHER",
0x00000200: "IMAGE_SCN_LNK_INFO",
0x00000400: "IMAGE_SCN_LNK_OVER", # reserved
0x00000800: "IMAGE_SCN_LNK_REMOVE",
0x00001000: "IMAGE_SCN_LNK_COMDAT",
0x00004000: "IMAGE_SCN_MEM_PROTECTED", # obsolete
0x00004000: "IMAGE_SCN_NO_DEFER_SPEC_EXC",
0x00008000: "IMAGE_SCN_GPREL",
0x00008000: "IMAGE_SCN_MEM_FARDATA",
0x00010000: "IMAGE_SCN_MEM_SYSHEAP", # obsolete
0x00020000: "IMAGE_SCN_MEM_PURGEABLE",
0x00020000: "IMAGE_SCN_MEM_16BIT",
0x00040000: "IMAGE_SCN_MEM_LOCKED",
0x00080000: "IMAGE_SCN_MEM_PRELOAD",
0x00100000: "IMAGE_SCN_ALIGN_1BYTES",
0x00200000: "IMAGE_SCN_ALIGN_2BYTES",
0x00300000: "IMAGE_SCN_ALIGN_4BYTES",
0x00400000: "IMAGE_SCN_ALIGN_8BYTES",
0x00500000: "IMAGE_SCN_ALIGN_16BYTES", # default alignment
0x00600000: "IMAGE_SCN_ALIGN_32BYTES",
0x00700000: "IMAGE_SCN_ALIGN_64BYTES",
0x00800000: "IMAGE_SCN_ALIGN_128BYTES",
0x00900000: "IMAGE_SCN_ALIGN_256BYTES",
0x00A00000: "IMAGE_SCN_ALIGN_512BYTES",
0x00B00000: "IMAGE_SCN_ALIGN_1024BYTES",
0x00C00000: "IMAGE_SCN_ALIGN_2048BYTES",
0x00D00000: "IMAGE_SCN_ALIGN_4096BYTES",
0x00E00000: "IMAGE_SCN_ALIGN_8192BYTES",
0x00F00000: "IMAGE_SCN_ALIGN_MASK",
0x01000000: "IMAGE_SCN_LNK_NRELOC_OVFL",
0x02000000: "IMAGE_SCN_MEM_DISCARDABLE",
0x04000000: "IMAGE_SCN_MEM_NOT_CACHED",
0x08000000: "IMAGE_SCN_MEM_NOT_PAGED",
0x10000000: "IMAGE_SCN_MEM_SHARED",
0x20000000: "IMAGE_SCN_MEM_EXECUTE",
0x40000000: "IMAGE_SCN_MEM_READ",
0x80000000: "IMAGE_SCN_MEM_WRITE",
},
}
DEFAULT_ENDIAN = "little"
def read_data(file_data, offset, number_of_bytes, string_data=None):
"""Just reads the straight data with no endianness."""
if number_of_bytes > 0:
data = file_data[offset : offset + number_of_bytes]
# if len(data) != number_of_bytes:
# print 'data out of bounds:', 'offset', hex(offset), 'data', data, 'data_len', len(data), 'num_bytes', number_of_bytes, 'total', hex(len(file_data))
return data
else:
return bytearray("")
def read_bytes(file_data, offset, number_of_bytes, endian=None, string_data=None):
"""Returns a tuple of the data value and string representation.
Will read 1,2,4,8 bytes with little endian as the default
(value, string)
"""
if number_of_bytes > 0:
endian = endian or DEFAULT_ENDIAN
endian = endian_symbols[endian]
data = bytes(file_data[offset : offset + number_of_bytes])
if len(data) != number_of_bytes:
return 0, ""
return struct.unpack(endian + struct_symbols[number_of_bytes], data)[0], data
else:
return 0, ""
def value_to_byte_string(value, number_of_bytes, endian=None):
endian = endian or DEFAULT_ENDIAN
endian = endian_symbols[endian]
return struct.pack(endian + struct_symbols[number_of_bytes], value)
class ResourceTypes(object):
Cursor = 1
Bitmap = 2
Icon = 3
Menu = 4
Dialog = 5
String = 6
Font_Directory = 7
Font = 8
Accelerator = 9
RC_Data = 10
Message_Table = 11
Group_Cursor = 12
Group_Icon = 14
Version_Info = 16
DLG_Include = 17
Plug_Play = 19
VXD = 20
Animated_Cursor = 21
Animated_Icon = 22
HTML = 23
Manifest = 24
resource_types = {
1: "Cursor",
2: "Bitmap",
3: "Icon",
4: "Menu",
5: "Dialog",
6: "String",
7: "Font Directory",
8: "Font",
9: "Accelerator",
10: "RC Data",
11: "Message Table",
12: "Group Cursor",
14: "Group Icon",
16: "Version Info",
17: "DLG Include",
19: "Plug and Play",
20: "VXD",
21: "Animated Cursor",
22: "Animated Icon",
23: "HTML",
24: "Manifest",
}
_32BIT_PLUS_MAGIC = 0x20B
_32BIT_MAGIC = 0x10B
_ROM_MAGIC = 0x107
def read_from_name_dict(obj, field_name):
dict_field = "{}_{}".format(obj.__class__.__name__, field_name)
return name_dictionary.get(dict_field, {})
def test_bit(value, index):
mask = 1 << index
return value & mask
def set_bit(value, index):
mask = 1 << index
return value | mask
def clear_bit(value, index):
mask = ~(1 << index)
return value & mask
def toggle_bit(value, index):
mask = 1 << index
return value ^ mask
class PEFormatError(Exception):
pass
class Printable(object):
def _attrs(self):
a = []
for attr in dir(self):
if not attr.startswith("_") and not callable(getattr(self, attr)):
a.append(attr)
return a
def _dict_items(self):
for a in reversed(self._attrs()):
yield a, getattr(self, a)
def _dict_string(self):
vals = []
for key, val in self._dict_items():
try:
vals.append("{}={}".format(key, val))
except UnicodeDecodeError:
vals.append("{}=<not printable>".format(key))
return ", ".join(vals)
def __repr__(self):
return str(self)
def __str__(self):
return "{} [{}]".format(self.__class__.__name__, self._dict_string())
class Structure(Printable):
_fields = {}
def __init__(
self,
size=0,
value=None,
data=None,
absolute_offset=0,
name="",
friendly_name="",
*args,
**kwargs
):
self._value = value
self.size = size
self.data = data
self.name = name
self.friendly_name = friendly_name
self._absolute_offset = absolute_offset
self._file_data = None
for k, v in kwargs.items():
setattr(self, k, v)
@property
def absolute_offset(self):
return self._absolute_offset
@absolute_offset.setter
def absolute_offset(self, abs_offset):
self._absolute_offset = abs_offset
for k, v in self._fields.items():
field = getattr(self, k)
field.absolute_offset = self.absolute_offset + field.offset
@property
def value(self):
return self._value
@value.setter
def value(self, value):
if self._file_data is not None:
self.data = value_to_byte_string(value, self.size)
self._file_data[
self.absolute_offset : self.absolute_offset + self.size
] = bytearray(self.data)
self._value = value
def process_field(self, file_data, field_name, field_info):
if hasattr(self, "process_" + field_name) and callable(
getattr(self, "process_" + field_name)
):
getattr(self, "process_" + field_name)(file_data, field_name, field_info)
else:
absolute_offset = field_info["offset"] + self.absolute_offset
size = field_info["size"]
self.size += size
int_value, data = read_bytes(file_data, absolute_offset, size)
field_name_dict = read_from_name_dict(self, field_name)
name = field_name_dict.get(int_value, "")
friendly_name = name.replace("_", " ").capitalize()
setattr(
self,
field_name,
Structure(
offset=field_info["offset"],
size=size,
value=int_value,
data=data,
absolute_offset=absolute_offset,
name=name,
friendly_name=friendly_name,
),
)
getattr(self, field_name)._file_data = file_data
def process_Characteristics(self, file_data, field_name, field_info):
absolute_offset = field_info["offset"] + self.absolute_offset
size = field_info["size"]
self.size += size
int_value, data = read_bytes(file_data, absolute_offset, size)
field_name_dict = read_from_name_dict(self, field_name)
bit_length = len(bin(int_value)) - 2
characteristics = {}
for i in range(bit_length):
set_bit = test_bit(int_value, i)
char_name = field_name_dict.get(set_bit, "")
if set_bit != 0 and char_name:
characteristics[char_name] = set_bit
setattr(
self,
field_name,
Structure(
offset=field_info["offset"],
size=size,
value=int_value,
data=data,
absolute_offset=absolute_offset,
values=characteristics,
),
)
getattr(self, field_name)._file_data = file_data
@classmethod
def parse_from_data(cls, file_data, **cls_args):
"""Parses the Structure from the file data."""
self = cls(**cls_args)
self._file_data = file_data
for field_name, field_info in self._fields.items():
self.process_field(file_data, field_name, field_info)
return self
class DOSHeader(Structure):
"""The dos header of the PE file"""
_fields = {
"Signature": {"offset": 0, "size": 2},
"PEHeaderOffset": {"offset": 0x3C, "size": 4},
}
class PEHeader(Structure):
"""PE signature plus the COFF header"""
_fields = {
"Signature": {"offset": 0, "size": 4},
"Machine": {"offset": 4, "size": 2},
"NumberOfSections": {"offset": 6, "size": 2},
"TimeDateStamp": {"offset": 8, "size": 4},
"PointerToSymbolTable": {"offset": 12, "size": 4},
"NumberOfSymbols": {"offset": 16, "size": 4},
"SizeOfOptionalHeader": {"offset": 20, "size": 2},
"Characteristics": {"offset": 22, "size": 2},
}
class OptionalHeader(Structure):
_fields_32_plus = {
"Magic": {"offset": 0, "size": 2},
"MajorLinkerVersion": {"offset": 2, "size": 1},
"MinorLinkerVersion": {"offset": 3, "size": 1},
"SizeOfCode": {"offset": 4, "size": 4},
"SizeOfInitializedData": {"offset": 8, "size": 4},
"SizeOfUninitializedData": {"offset": 12, "size": 4},
"AddressOfEntryPoint": {"offset": 16, "size": 4},
"BaseOfCode": {"offset": 20, "size": 4},
"ImageBase": {"offset": 24, "size": 8},
"SectionAlignment": {"offset": 32, "size": 4},
"FileAlignment": {"offset": 36, "size": 4},
"MajorOperatingSystemVersion": {"offset": 40, "size": 2},
"MinorOperatingSystemVersion": {"offset": 42, "size": 2},
"MajorImageVersion": {"offset": 44, "size": 2},
"MinorImageVersion": {"offset": 46, "size": 2},
"MajorSubsystemVersion": {"offset": 48, "size": 2},
"MinorSubsystemVersion": {"offset": 50, "size": 2},
"Reserved": {"offset": 52, "size": 4},
"SizeOfImage": {"offset": 56, "size": 4},
"SizeOfHeaders": {"offset": 60, "size": 4},
"SizeOfHeaders": {"offset": 60, "size": 4},
"CheckSum": {"offset": 64, "size": 4},
"Subsystem": {"offset": 68, "size": 2},
"DLL_Characteristics": {"offset": 70, "size": 2},
"SizeOfStackReserve": {"offset": 72, "size": 8},
"SizeOfStackCommit": {"offset": 80, "size": 8},
"SizeOfHeapReserve": {"offset": 88, "size": 8},
"SizeOfHeapCommit": {"offset": 96, "size": 8},
"LoaderFlags": {"offset": 104, "size": 4},
"NumberOfRvaAndSizes": {"offset": 108, "size": 4},
"ExportTableAddress": {"offset": 112, "size": 4},
"ExportTableSize": {"offset": 116, "size": 4},
"ImportTableAddress": {"offset": 120, "size": 4},
"ImportTableSize": {"offset": 124, "size": 4},
"ResourceTableAddress": {"offset": 128, "size": 4},
"ResourceTableSize": {"offset": 132, "size": 4},
"ExceptionTableAddress": {"offset": 136, "size": 4},
"ExceptionTableSize": {"offset": 140, "size": 4},
"CertificateTableAddress": {"offset": 144, "size": 4},
"CertificateTableSize": {"offset": 148, "size": 4},
"BaseRelocationTableAddress": {"offset": 152, "size": 4},
"BaseRelocationTableSize": {"offset": 156, "size": 4},
"DebugAddress": {"offset": 160, "size": 4},
"DebugSize": {"offset": 164, "size": 4},
"ArchitectureAddress": {"offset": 168, "size": 4},
"ArchitectureSize": {"offset": 172, "size": 4},
"GlobalPtrAddress": {"offset": 176, "size": 8},
"GlobalPtrSize": {"offset": 184, "size": 0},
"ThreadLocalStorageTableAddress": {"offset": 184, "size": 4},
"ThreadLocalStorageTableSize": {"offset": 188, "size": 4},
"LoadConfigTableAddress": {"offset": 192, "size": 4},
"LoadConfigTableSize": {"offset": 196, "size": 4},
"BoundImportAddress": {"offset": 200, "size": 4},
"BoundImportSize": {"offset": 204, "size": 4},
"ImportAddressTableAddress": {"offset": 208, "size": 4},
"ImportAddressTableSize": {"offset": 212, "size": 4},
"DelayImportDescriptorAddress": {"offset": 216, "size": 4},
"DelayImportDescriptorSize": {"offset": 220, "size": 4},
"COMRuntimeHeaderAddress": {"offset": 224, "size": 4},
"COMRuntimeHeaderSize": {"offset": 228, "size": 4},
"Reserved2": {"offset": 232, "size": 8},
}
_fields_32 = {
"Magic": {"offset": 0, "size": 2},
"MajorLinkerVersion": {"offset": 2, "size": 1},
"MinorLinkerVersion": {"offset": 3, "size": 1},
"SizeOfCode": {"offset": 4, "size": 4},
"SizeOfInitializedData": {"offset": 8, "size": 4}, #
"SizeOfUninitializedData": {"offset": 12, "size": 4},
"AddressOfEntryPoint": {"offset": 16, "size": 4},
"BaseOfCode": {"offset": 20, "size": 4},
"BaseOfData": {"offset": 24, "size": 4},
"ImageBase": {"offset": 28, "size": 4},
"SectionAlignment": {"offset": 32, "size": 4},
"FileAlignment": {"offset": 36, "size": 4},
"MajorOperatingSystemVersion": {"offset": 40, "size": 2},
"MinorOperatingSystemVersion": {"offset": 42, "size": 2},
"MajorImageVersion": {"offset": 44, "size": 2},
"MinorImageVersion": {"offset": 46, "size": 2},
"MajorSubsystemVersion": {"offset": 48, "size": 2},
"MinorSubsystemVersion": {"offset": 50, "size": 2},
"Reserved": {"offset": 52, "size": 4},
"SizeOfImage": {"offset": 56, "size": 4}, #
"SizeOfHeaders": {"offset": 60, "size": 4},
"CheckSum": {"offset": 64, "size": 4},
"Subsystem": {"offset": 68, "size": 2},
"DLL_Characteristics": {"offset": 70, "size": 2},
"SizeOfStackReserve": {"offset": 72, "size": 4},
"SizeOfStackCommit": {"offset": 76, "size": 4},
"SizeOfHeapReserve": {"offset": 80, "size": 4},
"SizeOfHeapCommit": {"offset": 84, "size": 4},
"LoaderFlags": {"offset": 88, "size": 4},
"NumberOfRvaAndSizes": {"offset": 92, "size": 4},
"ExportTableAddress": {"offset": 96, "size": 4},
"ExportTableSize": {"offset": 100, "size": 4},
"ImportTableAddress": {"offset": 104, "size": 4},
"ImportTableSize": {"offset": 108, "size": 4},
"ResourceTableAddress": {"offset": 112, "size": 4},
"ResourceTableSize": {"offset": 116, "size": 4}, #
"ExceptionTableAddress": {"offset": 120, "size": 4},
"ExceptionTableSize": {"offset": 124, "size": 4},
"CertificateTableAddress": {"offset": 128, "size": 4},
"CertificateTableSize": {"offset": 132, "size": 4},
"BaseRelocationTableAddress": {"offset": 136, "size": 4}, #
"BaseRelocationTableSize": {"offset": 140, "size": 4},
"DebugAddress": {"offset": 144, "size": 4},
"DebugSize": {"offset": 148, "size": 4},
"ArchitectureAddress": {"offset": 152, "size": 4},
"ArchitectureSize": {"offset": 156, "size": 4},
"GlobalPtrAddress": {"offset": 160, "size": 8},
"GlobalPtrSize": {"offset": 168, "size": 0},
"ThreadLocalStorageTableAddress": {"offset": 168, "size": 4},
"ThreadLocalStorageTableSize": {"offset": 172, "size": 4},
"LoadConfigTableAddress": {"offset": 176, "size": 4},
"LoadConfigTableSize": {"offset": 180, "size": 4},
"BoundImportAddress": {"offset": 184, "size": 4},
"BoundImportSize": {"offset": 188, "size": 4},
"ImportAddressTableAddress": {"offset": 192, "size": 4},
"ImportAddressTableSize": {"offset": 196, "size": 4},
"DelayImportDescriptorAddress": {"offset": 200, "size": 4},
"DelayImportDescriptorSize": {"offset": 204, "size": 4},
"COMRuntimeHeaderAddress": {"offset": 208, "size": 4},
"COMRuntimeHeaderSize": {"offset": 212, "size": 4},
"Reserved2": {"offset": 216, "size": 8},
}
def process_DLL_Characteristics(self, file_data, field_name, field_info):
self.process_Characteristics(file_data, field_name, field_info)
def process_field(self, file_data, field_name, field_info):
if hasattr(self, "process_" + field_name) and callable(
getattr(self, "process_" + field_name)
):
getattr(self, "process_" + field_name)(file_data, field_name, field_info)
else:
absolute_offset = field_info["offset"] + self.absolute_offset
size = field_info["size"]
self.size += size
int_value, data = read_bytes(file_data, absolute_offset, size)
field_name_dict = read_from_name_dict(self, field_name)
name = field_name_dict.get(int_value, "")
friendly_name = name.replace("_", " ").capitalize()
setattr(
self,
field_name,
Structure(
offset=field_info["offset"],
size=size,
value=int_value,
data=data,
absolute_offset=absolute_offset,
name=name,
friendly_name=friendly_name,
),
)
getattr(self, field_name)._file_data = file_data
@classmethod
def parse_from_data(cls, file_data, **cls_args):
"""Parses the Structure from the file data."""
self = cls(**cls_args)
self._file_data = file_data
magic, x = read_bytes(file_data, self.absolute_offset, 2)
if magic == _32BIT_MAGIC:
self._fields = self._fields_32
elif magic == _32BIT_PLUS_MAGIC:
self._fields = self._fields_32_plus
else:
print(magic, _32BIT_MAGIC, _32BIT_PLUS_MAGIC)
raise PEFormatError("Magic for Optional Header is invalid.")
for field_name, field_info in self._fields.items():
self.process_field(file_data, field_name, field_info)
return self
class SectionHeader(Structure):
"""Section Header. Each section header is a row in the section table"""
_fields = {
"Name": {"offset": 0, "size": 8},
"VirtualSize": {"offset": 8, "size": 4}, # .rsrc
"VirtualAddress": {"offset": 12, "size": 4}, # .reloc
"SizeOfRawData": {"offset": 16, "size": 4}, # .rsrc
"PointerToRawData": {"offset": 20, "size": 4}, # .reloc
"PointerToRelocations": {"offset": 24, "size": 4},
"PointerToLineNumbers": {"offset": 28, "size": 4},
"NumberOfRelocations": {"offset": 32, "size": 2},
"NumberOfLineNumbers": {"offset": 34, "size": 2},
"Characteristics": {"offset": 36, "size": 4},
}
class ResourceDirectoryTable(Structure):
_fields = {
"Characteristics": {"offset": 0, "size": 4},
"TimeDateStamp": {"offset": 4, "size": 4},
"MajorVersion": {"offset": 8, "size": 2},
"MinorVersion": {"offset": 10, "size": 2},
"NumberOfNameEntries": {"offset": 12, "size": 2},
"NumberOfIDEntries": {"offset": 14, "size": 2},
}
def __init__(self, *args, **kwargs):
self.name_entries = []
self.id_entries = []
self.subdirectory_tables = []
self.data_entries = []
super(ResourceDirectoryTable, self).__init__(*args, **kwargs)
class ResourceDirectoryEntryName(Structure):
_fields = {
"NameRVA": {"offset": 0, "size": 4},
"DataOrSubdirectoryEntryRVA": {
"offset": 4, # high bit 1 for subdir RVA
"size": 4,
},
}
directory_string = None
def is_data_entry(self):
return test_bit(self.DataOrSubdirectoryEntryRVA.value, 31) == 0
def data_rva_empty(self):
return self.get_data_or_subdirectory_rva() == 0
def get_data_or_subdirectory_rva(self, virtual_to_physical=0):
return clear_bit(
self.DataOrSubdirectoryEntryRVA.value - virtual_to_physical, 31
)
def get_data_or_subdirectory_absolute_offset(self):
return (
self.get_data_or_subdirectory_rva()
+ self._section_header.PointerToRawData.value
)
def get_name_absolute_offset(self):
return (
clear_bit(self.NameRVA.value, 31)
+ self._section_header.PointerToRawData.value
)
class ResourceDirectoryEntryID(Structure):
_fields = {
"IntegerID": {"offset": 0, "size": 4},
"DataOrSubdirectoryEntryRVA": {
"offset": 4, # high bit 1 for Subdir RVA
"size": 4,
},
}
def is_data_entry(self):
return test_bit(self.DataOrSubdirectoryEntryRVA.value, 31) == 0
def data_rva_empty(self):
return self.get_data_or_subdirectory_rva() == 0
def get_data_or_subdirectory_rva(self, virtual_to_physical=0):
return clear_bit(
self.DataOrSubdirectoryEntryRVA.value - virtual_to_physical, 31
)
def get_data_or_subdirectory_absolute_offset(self, vtp=0):
return (
self.get_data_or_subdirectory_rva(vtp)
+ self._section_header.PointerToRawData.value
)
class ResourceDirectoryString(Structure):
_fields = {
"Length": {"offset": 0, "size": 2},
# String : offset=2, len=Length
}
@classmethod
def parse_from_data(cls, file_data, **cls_args):
"""Parses the Structure from the file data."""
self = cls(**cls_args)
self._file_data = file_data
str_len, _ = read_bytes(file_data, self.absolute_offset, 2)
self._fields["String"] = {"offset": 2, "size": str_len}
for field_name, field_info in self._fields.items():
self.process_field(file_data, field_name, field_info)
return self
def process_String(self, file_data, field_name, field_info):
absolute_offset = field_info["offset"] + self.absolute_offset
size = field_info["size"]
self.size += size
data = ""
for i in range(size):
val, dat = read_bytes(file_data, absolute_offset + i * 2, 2)
data += str(dat, "utf-8")
setattr(
self,
field_name,
Structure(
offset=field_info["offset"],
size=size,
data=data,
absolute_offset=absolute_offset,
),
)
class ResourceDataEntry(Structure):
_fields = {
"DataRVA": {"offset": 0, "size": 4},
"Size": {"offset": 4, "size": 4},
"Codepage": {"offset": 8, "size": 4},
"Reserved": {"offset": 12, "size": 4},
}
def get_data_absolute_offset(self):
return (
self._section_header.PointerToRawData.value
- self._section_header.VirtualAddress.value
+ self.DataRVA.value
)
def process_field(self, file_data, field_name, field_info):
if hasattr(self, "process_" + field_name) and callable(
getattr(self, "process_" + field_name)
):
getattr(self, "process_" + field_name)(file_data, field_name, field_info)
else:
absolute_offset = field_info["offset"] + self.absolute_offset
size = field_info["size"]
self.size += size
int_value, data = read_bytes(file_data, absolute_offset, size)
field_name_dict = read_from_name_dict(self, field_name)
name = field_name_dict.get(int_value, "")
friendly_name = name.replace("_", " ").capitalize()
setattr(
self,
field_name,
Structure(
offset=field_info["offset"],
size=size,
value=int_value,
data=data,
absolute_offset=absolute_offset,
name=name,
friendly_name=friendly_name,
),
)
getattr(self, field_name)._file_data = file_data
@classmethod
def parse_from_data(cls, file_data, **cls_args):
"""Parses the Structure from the file data."""
self = cls(**cls_args)
self._file_data = file_data
for field_name, field_info in self._fields.items():
self.process_field(file_data, field_name, field_info)
self.data = read_data(
file_data, self.get_data_absolute_offset(), self.Size.value
)
return self
class ResourceHeader(Structure):
_fields = {
"DataSize": {"offset": 0, "size": 4},
"HeaderSize": {"offset": 4, "size": 4},
"Type": {"offset": 8, "size": 4},
"Name": {"offset": 12, "size": 4},
"DataVersion": {"offset": 16, "size": 4},
"MemoryFlags": {"offset": 20, "size": 2},
"LanguageID": {"offset": 22, "size": 2},
"Version": {"offset": 24, "size": 4},
"Characteristics": {"offset": 28, "size": 4},
}
def get_name(self):
return resource_types[self.Type.value]
def set_name(self, value):
for k, v in resource_types.items():
if v == value:
self.Type.value = k
return
class IconHeader(Structure):
_fields = {
"Reserved": {"offset": 0, "size": 2},
"ImageType": {"offset": 2, "size": 2}, # 1 for ICO, 2 for CUR, others invalid
"ImageCount": {"offset": 4, "size": 2},
}
def copy_from(self, group_header):
self.Reserved.value = group_header.Reserved.value
self.ImageType.value = group_header.ResourceType.value
self.ImageCount.value = group_header.ResourceCount.value
self.entries = []
entry_offset = 0
self.total_size = self.size
for group_entry in group_header.entries:
icon_entry = IconEntry.parse_from_data(
bytearray(""),
absolute_offset=self.absolute_offset + self.size + entry_offset,
offset=entry_offset,
)
icon_entry._file_data = self._file_data
icon_entry.copy_from(group_entry)
icon_entry.number = group_entry.number
self.entries.append(icon_entry)
entry_offset += icon_entry.size
self.total_size += icon_entry.size
@classmethod
def parse_from_data(cls, file_data, **cls_args):
"""Parses the Structure from the file data."""
self = cls(**cls_args)
self._file_data = file_data
for field_name, field_info in self._fields.items():
self.process_field(file_data, field_name, field_info)
self.entries = []
entry_offset = 0
self.total_size = self.size
for i in range(self.ImageCount.value):
entry = IconEntry.parse_from_data(
file_data,
absolute_offset=self.absolute_offset + self.size + entry_offset,
offset=entry_offset,
)
entry.number = i + 1
self.entries.append(entry)
entry_offset += entry.size
self.total_size += entry.size
return self
class GroupHeader(Structure):
_fields = {
"Reserved": {"offset": 0, "size": 2},
"ResourceType": {
"offset": 2, # 1 for ICO, 2 for CUR, others invalid
"size": 2,
},
"ResourceCount": {"offset": 4, "size": 2},
}
def copy_from(self, icon_header):
self.Reserved._file_data = self._file_data
self.ResourceType._file_data = self._file_data
self.ResourceCount._file_data = self._file_data
self.Reserved.value = icon_header.Reserved.value
self.ResourceType.value = icon_header.ImageType.value
self.ResourceCount.value = icon_header.ImageCount.value
self.entries = []
entry_offset = 0
self.total_size = self.size
for icon_entry in icon_header.entries:
group_entry = GroupEntry.parse_from_data(
bytearray(b""),
absolute_offset=self.absolute_offset + self.size + entry_offset,
offset=entry_offset,
)
group_entry._file_data = self._file_data
group_entry.copy_from(icon_entry)
group_entry.number = icon_entry.number
self.entries.append(group_entry)
entry_offset += group_entry.size
self.total_size += group_entry.size
@classmethod
def parse_from_data(cls, file_data, **cls_args):
"""Parses the Structure from the file data."""
self = cls(**cls_args)
self._file_data = file_data
for field_name, field_info in self._fields.items():
self.process_field(file_data, field_name, field_info)
self.entries = []
entry_offset = 0
self.total_size = self.size
for i in range(self.ResourceCount.value):
entry = GroupEntry.parse_from_data(
file_data,
absolute_offset=self.absolute_offset + self.size + entry_offset,
offset=entry_offset,
)
entry.number = i + 1
self.entries.append(entry)
entry_offset += entry.size
self.total_size += entry.size
return self
class IconEntry(Structure):
_fields = {
"Width": {"offset": 0, "size": 1},
"Height": {"offset": 1, "size": 1},