def parse_content(self,
parse_resources=True,
parse_delay=True,
parse_reloc=True):
h = struct.unpack("BB", self.content[:2])
if h != (0x4d, 0x5a): # magic number, MZ
raise ValueError("Not a PE, no MZ magic number")
of = 0
self.sex = '<'
self.wsize = 32
self.DOShdr = pe.DOShdr(parent=self, content=self.content, start=of)
of = self.DOShdr.lfanew
if of > len(self.content):
raise ValueError('Not a PE, NTsig offset after eof %#x', of)
self.NTsig = pe.NTsig(parent=self, content=self.content, start=of)
if self.NTsig.signature != 0x4550: # PE\0\0
raise ValueError('Not a PE, NTsig is %#x', self.NTsig.signature)
of += self.NTsig.bytelen
self.COFFhdr = pe.COFFhdr(parent=self, content=self.content, start=of)
of += self.COFFhdr.bytelen
magic, = struct.unpack('H', self.content[of:of + 2])
self.wsize = (magic >> 8) * 32
if not magic in (0x10b, 0x20b):
# e.g. Ange Albertini's d_nonnull.dll d_tiny.dll
log.warning('Opthdr magic %#x', magic)
self.wsize = 32
self.Opthdr = {
32: pe.Opthdr32,
64: pe.Opthdr64
}[self.wsize](parent=self, content=self.content, start=of)
l = self.Opthdr.bytelen
self.NThdr = pe.NThdr(parent=self, content=self.content, start=of + l)
of += self.COFFhdr.sizeofoptionalheader
if self.NThdr.numberofrvaandsizes < 13:
log.warning('Windows 8 needs at least 13 directories, %d found',
self.NThdr.numberofrvaandsizes)
# Even if the NT header has 64-bit pointers, in 64-bit PE files
# the Section headers have 32-bit pointers (it is a 32-bit COFF
# in a 64-bit PE).
self.SHList = pe.SHList(parent=self,
content=self.content,
start=of,
wsize=32)
# Directory parsing.
# 'start' is None, because the offset is computed from the RVA
# in the NT header
kargs = {'parent': self, 'content': self.content, 'start': None}
self.DirImport = pe.DirImport(**kargs)
self.DirExport = pe.DirExport(**kargs)
if parse_delay: self.DirDelay = pe.DirDelay(**kargs)
if parse_reloc: self.DirReloc = pe.DirReloc(**kargs)
if parse_resources: self.DirRes = pe.DirRes(**kargs)
if self.COFFhdr.pointertosymboltable != 0:
if self.COFFhdr.pointertosymboltable + 18 * self.COFFhdr.numberofsymbols > len(
self.content):
log.warning('Too many symbols: %d',
self.COFFhdr.numberofsymbols)
self.Symbols = pe.CoffSymbols(**kargs)
if hasattr(self, 'Symbols'):
of = self.COFFhdr.pointertosymboltable + self.Symbols.bytelen
sz, = struct.unpack(self.sex + 'I', self.content[of:of + 4])
if len(self.content) < of + sz:
log.warning('File too short for StrTable %#x != %#x' %
(len(self.content) - of, sz))
sz = len(self.content) - of
self.SymbolStrings = StrTable(self.content[of:of + sz])
sb.pe.virt[sb.pe.rva2virt(s.addr)] = sdata # Set callbacks sb.jitter.add_breakpoint(end_label, update_binary) # Run sb.run() # Rebuild PE new_dll = [] sb.pe.SHList.align_sections(0x1000, 0x1000) logging.info(repr(sb.pe.SHList)) sb.pe.DirRes = pe.DirRes(sb.pe) sb.pe.DirImport.impdesc = None logging.info(repr(sb.pe.DirImport.impdesc)) new_dll = sb.libs.gen_new_lib(sb.pe) logging.info(new_dll) sb.pe.DirImport.impdesc = [] sb.pe.DirImport.add_dlldesc(new_dll) s_myimp = sb.pe.SHList.add_section(name="myimp", rawsize=len(sb.pe.DirImport)) logging.info(repr(sb.pe.SHList)) sb.pe.DirImport.set_rva(s_myimp.addr) # XXXX TODO sb.pe.NThdr.optentries[pe.DIRECTORY_ENTRY_DELAY_IMPORT].rva = 0 sb.pe.Opthdr.AddressOfEntryPoint = sb.pe.virt2rva(end_label) bname, fname = os.path.split(options.filename)
def __init__(self,
pestr=None,
parse_resources=True,
parse_delay=True,
parse_reloc=True,
wsize=32):
self._rva = ContentRVA(self)
self._virt = ContentVirtual(self)
if pestr == None:
self.sex = '<'
self.wsize = wsize
self.DOShdr = pe.DOShdr(parent=self, wsize=32)
self.NTsig = pe.NTsig(parent=self, wsize=32)
self.COFFhdr = pe.COFFhdr(parent=self, wsize=32)
self.Opthdr = {
32: pe.Opthdr32,
64: pe.Opthdr64
}[wsize](parent=self)
self.NThdr = pe.NThdr(parent=self)
self.SHList = pe.SHList(parent=self, wsize=32)
self.DirImport = pe.DirImport(parent=self)
self.DirExport = pe.DirExport(parent=self)
self.DirDelay = pe.DirDelay(parent=self)
self.DirReloc = pe.DirReloc(parent=self)
self.DirRes = pe.DirRes(parent=self)
self.DOShdr.magic = 0x5a4d
self.DOShdr.lfanew = 0xe0
if wsize == 32:
self.COFFhdr.machine = pe.IMAGE_FILE_MACHINE_I386
self.COFFhdr.characteristics = 0x10f
self.COFFhdr.sizeofoptionalheader = 0xe0
self.Opthdr.magic = pe.IMAGE_NT_OPTIONAL_HDR32_MAGIC
elif wsize == 64:
self.COFFhdr.machine = pe.IMAGE_FILE_MACHINE_AMD64
self.COFFhdr.characteristics = 0x22
self.COFFhdr.sizeofoptionalheader = 0xf0
self.Opthdr.magic = pe.IMAGE_NT_OPTIONAL_HDR64_MAGIC
self.Opthdr.majorlinkerversion = 0x7
self.Opthdr.minorlinkerversion = 0x0
self.NThdr.ImageBase = 0x400000
self.NThdr.sectionalignment = 0x1000
self.NThdr.filealignment = 0x200
self.NThdr.filealignment = 0x1000 # previous versions of elfesteem
self.NThdr.majoroperatingsystemversion = 0x5
self.NThdr.minoroperatingsystemversion = 0x1
self.NThdr.MajorImageVersion = 0x5
self.NThdr.MinorImageVersion = 0x1
self.NThdr.majorsubsystemversion = 0x4
self.NThdr.minorsubsystemversion = 0x0
self.NThdr.subsystem = 0x3
self.NThdr.dllcharacteristics = 0x8000
self.NThdr.sizeofstackreserve = 0x200000
self.NThdr.sizeofstackcommit = 0x1000
self.NThdr.sizeofheapreserve = 0x100000
self.NThdr.sizeofheapcommit = 0x1000
self.NThdr.sizeofheaders = 0x1000
self.NThdr.numberofrvaandsizes = 0x10
self.NThdr.optentries = pe.OptNThdrs(parent=self.NThdr)
for _ in range(self.NThdr.numberofrvaandsizes):
self.NThdr.optentries.append(
pe.OptNThdr(parent=self.NThdr.optentries))
self.NThdr._size += self.NThdr.optentries.bytelen
self.NThdr.CheckSum = 0
self.NTsig.signature = 0x4550
self.content = StrPatchwork(self.pack())
else:
self.content = StrPatchwork(pestr)
self.parse_content(parse_resources=parse_resources,
parse_delay=parse_delay,
parse_reloc=parse_reloc)
# For API compatibility with previous versions of elfesteem
self._sex = '<>'.index(self.sex)
self._wsize = self.wsize
