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syms2elf.py
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#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# sym2elf
# 28/11/2014
#
# Daniel García <danigargu [at] gmail.com>
# Jesús Olmos <sha0 [at] badchecksum.net>
#
# ELF parser - based on the lib of ROPgadget tool by Jonathan Salwan
# http://shell-storm.org/project/ROPgadget/
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
PLUG_NAME = "syms2elf"
import os
import sys
from ctypes import *
from struct import unpack
USE_R2 = False
USE_IDA = False
try:
import idaapi
USE_IDA = True
except:
if "radare2" in os.environ.get('PATH',''):
USE_R2 = True
else:
print("ERROR: The plugin must be run in IDA or radare2")
sys.exit(0)
SHN_UNDEF = 0
STB_GLOBAL_FUNC = 0x12
class SHTypes:
SHT_NULL = 0
SHT_PROGBITS = 1
SHT_SYMTAB = 2
SHT_STRTAB = 3
SHT_RELA = 4
SHT_HASH = 5
SHT_DYNAMIC = 6
SHT_NOTE = 7
SHT_NOBITS = 8
SHT_REL = 9
SHT_SHLIB = 10
SHT_DYNSYM = 11
SHT_NUM = 12
SHT_LOPROC = 0x70000000
SHT_HIPROC = 0x7fffffff
SHT_LOUSER = 0x80000000
SHT_HIUSER = 0xffffffff
class ELFFlags:
ELFCLASS32 = 0x01
ELFCLASS64 = 0x02
EI_CLASS = 0x04
EI_DATA = 0x05
ELFDATA2LSB = 0x01
ELFDATA2MSB = 0x02
EM_386 = 0x03
EM_X86_64 = 0x3e
EM_ARM = 0x28
EM_MIPS = 0x08
EM_SPARCv8p = 0x12
EM_PowerPC = 0x14
EM_ARM64 = 0xb7
class SymFlags:
STB_LOCAL = 0
STB_GLOBAL = 1
STB_WEAK = 2
STT_NOTYPE = 0
STT_OBJECT = 1
STT_FUNC = 2
STT_SECTION = 3
STT_FILE = 4
STT_COMMON = 5
STT_TLS = 6
class Elf32_Ehdr_LSB(LittleEndianStructure):
_fields_ = [
("e_ident", c_ubyte * 16),
("e_type", c_ushort),
("e_machine", c_ushort),
("e_version", c_uint),
("e_entry", c_uint),
("e_phoff", c_uint),
("e_shoff", c_uint),
("e_flags", c_uint),
("e_ehsize", c_ushort),
("e_phentsize", c_ushort),
("e_phnum", c_ushort),
("e_shentsize", c_ushort),
("e_shnum", c_ushort),
("e_shstrndx", c_ushort)
]
class Elf64_Ehdr_LSB(LittleEndianStructure):
_fields_ = [
("e_ident", c_ubyte * 16),
("e_type", c_ushort),
("e_machine", c_ushort),
("e_version", c_uint),
("e_entry", c_ulonglong),
("e_phoff", c_ulonglong),
("e_shoff", c_ulonglong),
("e_flags", c_uint),
("e_ehsize", c_ushort),
("e_phentsize", c_ushort),
("e_phnum", c_ushort),
("e_shentsize", c_ushort),
("e_shnum", c_ushort),
("e_shstrndx", c_ushort)
]
class Elf32_Phdr_LSB(LittleEndianStructure):
_fields_ = [
("p_type", c_uint),
("p_offset", c_uint),
("p_vaddr", c_uint),
("p_paddr", c_uint),
("p_filesz", c_uint),
("p_memsz", c_uint),
("p_flags", c_uint),
("p_align", c_uint)
]
class Elf64_Phdr_LSB(LittleEndianStructure):
_fields_ = [
("p_type", c_uint),
("p_flags", c_uint),
("p_offset", c_ulonglong),
("p_vaddr", c_ulonglong),
("p_paddr", c_ulonglong),
("p_filesz", c_ulonglong),
("p_memsz", c_ulonglong),
("p_align", c_ulonglong)
]
class Elf32_Shdr_LSB(LittleEndianStructure):
_fields_ = [
("sh_name", c_uint),
("sh_type", c_uint),
("sh_flags", c_uint),
("sh_addr", c_uint),
("sh_offset", c_uint),
("sh_size", c_uint),
("sh_link", c_uint),
("sh_info", c_uint),
("sh_addralign", c_uint),
("sh_entsize", c_uint)
]
class Elf64_Shdr_LSB(LittleEndianStructure):
_fields_ = [
("sh_name", c_uint),
("sh_type", c_uint),
("sh_flags", c_ulonglong),
("sh_addr", c_ulonglong),
("sh_offset", c_ulonglong),
("sh_size", c_ulonglong),
("sh_link", c_uint),
("sh_info", c_uint),
("sh_addralign", c_ulonglong),
("sh_entsize", c_ulonglong)
]
class Elf32_Ehdr_MSB(BigEndianStructure):
_fields_ = [
("e_ident", c_ubyte * 16),
("e_type", c_ushort),
("e_machine", c_ushort),
("e_version", c_uint),
("e_entry", c_uint),
("e_phoff", c_uint),
("e_shoff", c_uint),
("e_flags", c_uint),
("e_ehsize", c_ushort),
("e_phentsize", c_ushort),
("e_phnum", c_ushort),
("e_shentsize", c_ushort),
("e_shnum", c_ushort),
("e_shstrndx", c_ushort)
]
class Elf64_Ehdr_MSB(BigEndianStructure):
_fields_ = [
("e_ident", c_ubyte * 16),
("e_type", c_ushort),
("e_machine", c_ushort),
("e_version", c_uint),
("e_entry", c_ulonglong),
("e_phoff", c_ulonglong),
("e_shoff", c_ulonglong),
("e_flags", c_uint),
("e_ehsize", c_ushort),
("e_phentsize", c_ushort),
("e_phnum", c_ushort),
("e_shentsize", c_ushort),
("e_shnum", c_ushort),
("e_shstrndx", c_ushort)
]
class Elf32_Phdr_MSB(BigEndianStructure):
_fields_ = [
("p_type", c_uint),
("p_offset", c_uint),
("p_vaddr", c_uint),
("p_paddr", c_uint),
("p_filesz", c_uint),
("p_memsz", c_uint),
("p_flags", c_uint),
("p_align", c_uint)
]
class Elf64_Phdr_MSB(BigEndianStructure):
_fields_ = [
("p_type", c_uint),
("p_flags", c_uint),
("p_offset", c_ulonglong),
("p_vaddr", c_ulonglong),
("p_paddr", c_ulonglong),
("p_filesz", c_ulonglong),
("p_memsz", c_ulonglong),
("p_align", c_ulonglong)
]
class Elf32_Shdr_MSB(BigEndianStructure):
_fields_ = [
("sh_name", c_uint),
("sh_type", c_uint),
("sh_flags", c_uint),
("sh_addr", c_uint),
("sh_offset", c_uint),
("sh_size", c_uint),
("sh_link", c_uint),
("sh_info", c_uint),
("sh_addralign", c_uint),
("sh_entsize", c_uint)
]
class Elf64_Shdr_MSB(BigEndianStructure):
_fields_ = [
("sh_name", c_uint),
("sh_type", c_uint),
("sh_flags", c_ulonglong),
("sh_addr", c_ulonglong),
("sh_offset", c_ulonglong),
("sh_size", c_ulonglong),
("sh_link", c_uint),
("sh_info", c_uint),
("sh_addralign", c_ulonglong),
("sh_entsize", c_ulonglong)
]
class Elf32_Sym_LSB(LittleEndianStructure):
_fields_ = [
("st_name", c_uint),
("st_value", c_uint),
("st_size", c_uint),
("st_info", c_ubyte),
("st_other", c_ubyte),
("st_shndx", c_ushort)
]
class Elf64_Sym_LSB(LittleEndianStructure):
_fields_ = [
("st_name", c_uint),
("st_info", c_ubyte),
("st_other", c_ubyte),
("st_shndx", c_ushort),
("st_value", c_ulonglong),
("st_size", c_ulonglong)
]
class Elf32_Sym_MSB(BigEndianStructure):
_fields_ = [
("st_name", c_uint),
("st_value", c_uint),
("st_size", c_uint),
("st_info", c_ubyte),
("st_other", c_ubyte),
("st_shndx", c_ushort)
]
class Elf64_Sym_MSB(BigEndianStructure):
_fields_ = [
("st_name", c_uint),
("st_info", c_ubyte),
("st_other", c_ubyte),
("st_shndx", c_ushort),
("st_value", c_ulonglong),
("st_size", c_ulonglong)
]
""" This class parses the ELF """
class ELF:
def __init__(self, binary):
self.binary = bytearray(binary)
self.ElfHeader = None
self.shdr_l = []
self.phdr_l = []
self.syms_l = []
self.e_ident = self.binary[:15]
self.ei_data = unpack("<B", self.e_ident[ELFFlags.EI_DATA:ELFFlags.EI_DATA+1])[0] # LSB/MSB
self.__setHeaderElf()
self.__setShdr()
self.__setPhdr()
def is_stripped(self):
if not self.get_symtab():
return True
if not self.get_strtab():
return True
return False
def strip_symbols(self):
sh2delete = 2
size2dec = 0
end_shdr = self.ElfHeader.e_shoff + (self.sizeof_sh() * self.ElfHeader.e_shnum)
symtab = self.get_symtab()
strtab = self.get_strtab()
if not symtab or not strtab:
return False
log("Stripping binary...")
if symtab.sh_offset < end_shdr:
size2dec += symtab.sh_size
if strtab.sh_offset < end_shdr:
size2dec += strtab.sh_size
self.ElfHeader.e_shoff -= size2dec
self.ElfHeader.e_shnum -= sh2delete
e_shnum = self.ElfHeader.e_shnum
e_shoff = self.ElfHeader.e_shoff
sz_striped = (e_shoff + (e_shnum * self.sizeof_sh()))
if strtab.sh_offset > symtab.sh_offset:
self.cut_at_offset(strtab.sh_offset, strtab.sh_size)
self.cut_at_offset(symtab.sh_offset, symtab.sh_size)
else:
self.cut_at_offset(symtab.sh_offset, symtab.sh_size)
self.cut_at_offset(strtab.sh_offset, strtab.sh_size)
self.binary = self.binary[0:sz_striped]
self.write(0, self.ElfHeader)
return True
def get_symtab(self):
shstrtab = bytes(self.get_shstrtab_data())
for sh in self.shdr_l:
sh_name = shstrtab[sh.sh_name:].split(b"\0")[0]
if sh.sh_type == SHTypes.SHT_SYMTAB and \
(sh.sh_name == SHN_UNDEF or sh_name == ".symtab"):
return sh
return None
def get_strtab(self):
shstrtab = bytes(self.get_shstrtab_data())
for sh in self.shdr_l:
sh_name = shstrtab[sh.sh_name:].split(b"\0")[0]
if sh.sh_type == SHTypes.SHT_STRTAB and \
(sh.sh_name == SHN_UNDEF or sh_name == ".strtab"):
return sh
return None
def getArchMode(self):
if self.ElfHeader.e_ident[ELFFlags.EI_CLASS] == ELFFlags.ELFCLASS32:
return 32
elif self.ElfHeader.e_ident[ELFFlags.EI_CLASS] == ELFFlags.ELFCLASS64:
return 64
else:
log("[Error] ELF.getArchMode() - Bad Arch size")
return None
""" Parse ELF header """
def __setHeaderElf(self):
e_ident = self.binary[:15]
ei_class = unpack("<B", e_ident[ELFFlags.EI_CLASS:ELFFlags.EI_CLASS+1])[0]
ei_data = unpack("<B", e_ident[ELFFlags.EI_DATA:ELFFlags.EI_DATA+1])[0]
if ei_class != ELFFlags.ELFCLASS32 and ei_class != ELFFlags.ELFCLASS64:
log("[Error] ELF.__setHeaderElf() - Bad Arch size")
return None
if ei_data != ELFFlags.ELFDATA2LSB and ei_data != ELFFlags.ELFDATA2MSB:
log("[Error] ELF.__setHeaderElf() - Bad architecture endian")
return None
if ei_class == ELFFlags.ELFCLASS32:
if ei_data == ELFFlags.ELFDATA2LSB: self.ElfHeader = Elf32_Ehdr_LSB.from_buffer_copy(self.binary)
elif ei_data == ELFFlags.ELFDATA2MSB: self.ElfHeader = Elf32_Ehdr_MSB.from_buffer_copy(self.binary)
elif ei_class == ELFFlags.ELFCLASS64:
if ei_data == ELFFlags.ELFDATA2LSB: self.ElfHeader = Elf64_Ehdr_LSB.from_buffer_copy(self.binary)
elif ei_data == ELFFlags.ELFDATA2MSB: self.ElfHeader = Elf64_Ehdr_MSB.from_buffer_copy(self.binary)
""" Write the section header to self.binary """
def write_shdr(self):
off = self.ElfHeader.e_shoff
for sh in self.shdr_l:
self.write(off, sh)
off += off + sizeof(sh)
""" Parse Section header """
def __setShdr(self):
shdr_num = self.ElfHeader.e_shnum
base = self.binary[self.ElfHeader.e_shoff:]
shdr_l = []
e_ident = self.binary[:15]
ei_data = unpack("<B", e_ident[ELFFlags.EI_DATA:ELFFlags.EI_DATA+1])[0]
for i in range(shdr_num):
if self.getArchMode() == 32:
if ei_data == ELFFlags.ELFDATA2LSB: shdr = Elf32_Shdr_LSB.from_buffer_copy(base)
elif ei_data == ELFFlags.ELFDATA2MSB: shdr = Elf32_Shdr_MSB.from_buffer_copy(base)
elif self.getArchMode() == 64:
if ei_data == ELFFlags.ELFDATA2LSB: shdr = Elf64_Shdr_LSB.from_buffer_copy(base)
elif ei_data == ELFFlags.ELFDATA2MSB: shdr = Elf64_Shdr_MSB.from_buffer_copy(base)
self.shdr_l.append(shdr)
base = base[self.ElfHeader.e_shentsize:]
string_table = self.binary[(self.shdr_l[self.ElfHeader.e_shstrndx].sh_offset):]
for i in range(shdr_num):
self.shdr_l[i].str_name = string_table[self.shdr_l[i].sh_name:].split(b'\0')[0]
""" Parse Program header """
def __setPhdr(self):
pdhr_num = self.ElfHeader.e_phnum
base = self.binary[self.ElfHeader.e_phoff:]
phdr_l = []
e_ident = self.binary[:15]
ei_data = unpack("<B", e_ident[ELFFlags.EI_DATA:ELFFlags.EI_DATA+1])[0]
for i in range(pdhr_num):
if self.getArchMode() == 32:
if ei_data == ELFFlags.ELFDATA2LSB: phdr = Elf32_Phdr_LSB.from_buffer_copy(base)
elif ei_data == ELFFlags.ELFDATA2MSB: phdr = Elf32_Phdr_MSB.from_buffer_copy(base)
elif self.getArchMode() == 64:
if ei_data == ELFFlags.ELFDATA2LSB: phdr = Elf64_Phdr_LSB.from_buffer_copy(base)
elif ei_data == ELFFlags.ELFDATA2MSB: phdr = Elf64_Phdr_MSB.from_buffer_copy(base)
self.phdr_l.append(phdr)
base = base[self.ElfHeader.e_phentsize:]
def get_section_id(self, sh_name):
for idx, sh in enumerate(self.shdr_l):
if sh.str_name == sh_name.encode('ascii'):
return idx
return None
def get_shstrtab_data(self):
sh = self.shdr_l[self.ElfHeader.e_shstrndx]
if sh.sh_type == SHTypes.SHT_STRTAB:
return self.binary[sh.sh_offset:sh.sh_offset+sh.sh_size]
return None
def get_sym_at_offset(self, off):
if self.getArchMode() == 32:
if ei_data == ELFFlags.ELFDATA2LSB: sym = Elf32_Sym_LSB.from_buffer_copy(self.binary[off:])
elif ei_data == ELFFlags.ELFDATA2MSB: sym = Elf32_Sym_MSB.from_buffer_copy(self.binary[off:])
elif self.getArchMode() == 64:
if ei_data == ELFFlags.ELFDATA2LSB: sym = Elf64_Sym_LSB.from_buffer_copy(self.binary[off:])
elif ei_data == ELFFlags.ELFDATA2MSB: sym = Elf64_Sym_MSB.from_buffer_copy(self.binaryGetInputFilePath[off:])
return sym
def get_entrypoint(self):
return self.e_entry
def sizeof_sh(self):
size = None
if self.getArchMode() == 32:
size = sizeof(Elf32_Shdr_LSB())
elif self.getArchMode() == 64:
size = sizeof(Elf64_Shdr_LSB())
return size
def sizeof_sym(self):
size = None
if self.getArchMode() == 32:
size = sizeof(Elf32_Sym_LSB)
elif self.getArchMode() == 64:
size = sizeof(Elf64_Sym_LSB)
return size
def append_section_header(self, section):
sh = None
if self.getArchMode() == 32:
if self.ei_data == ELFFlags.ELFDATA2LSB: sh = Elf32_Shdr_LSB()
elif self.ei_data == ELFFlags.ELFDATA2MSB: sh = Elf32_Shdr_MSB()
elif self.getArchMode() == 64:
if self.ei_data == ELFFlags.ELFDATA2LSB: sh = Elf64_Shdr_LSB()
elif self.ei_data == ELFFlags.ELFDATA2MSB: sh = Elf64_Shdr_MSB()
sh.sh_name = section["name"]
sh.sh_type = section["type"]
sh.sh_flags = section["flags"]
sh.sh_addr = section["addr"]
sh.sh_offset = section["offset"]
sh.sh_size = section["size"]
sh.sh_link = section["link"]
sh.sh_info = section["info"]
sh.sh_addralign = section["addralign"]
sh.sh_entsize = section["entsize"]
self.binary.extend(sh)
def append_symbol(self, symbol):
if self.getArchMode() == 32:
if self.ei_data == ELFFlags.ELFDATA2LSB: sym = Elf32_Sym_LSB()
elif self.ei_data == ELFFlags.ELFDATA2MSB: sym = Elf32_Sym_MSB()
elif self.getArchMode() == 64:
if self.ei_data == ELFFlags.ELFDATA2LSB: sym = Elf64_Sym_LSB()
elif self.ei_data == ELFFlags.ELFDATA2MSB: sym = Elf64_Sym_MSB()
sym.st_name = symbol["name"]
sym.st_value = symbol["value"]
sym.st_size = symbol["size"]
sym.st_info = symbol["info"]
sym.st_other = symbol["other"]
sym.st_shndx = symbol["shndx"]
self.binary.extend(sym)
def get_binary(self):
return self.binary
def write(self, offset, data):
self.binary[offset:offset+sizeof(data)] = data
def expand_at_offset(self, offset, data):
self.binary = self.binary[:offset] + data + self.binary[offset:]
def cut_at_offset(self, offset, size):
self.binary = self.binary[:offset] + self.binary[offset+size:]
def save(self, output):
with open(output, 'wb') as f:
f.write(self.binary)
class Symbol:
def __init__(self, name, info, value, size, shname, shndx=-1):
self.name = name
self.info = info
self.value = value
self.size = size
self.shname = shname
self.shndx = shndx
def __str__(self):
return "%s;%s;%s;%s;%s" % (self.name, self.value, self.size,
self.info, self.shname)
def log(msg=''):
print("[%s] %s" % (PLUG_NAME, msg))
def log_r2(msg=''):
print("%s" % msg)
def write_symbols(input_file, output_file, symbols):
try:
with open(input_file, 'rb') as f:
bin = ELF(f.read())
if len(symbols) < 1:
log("No symbols to export")
return
log("Exporting symbols to ELF...")
bin.strip_symbols()
# raw strtab
strtab_raw = b"\x00" + b"\x00".join([sym.name.encode('ascii') for sym in symbols]) + b"\x00"
symtab = {
"name" : SHN_UNDEF,
"type" : SHTypes.SHT_SYMTAB,
"flags" : 0,
"addr" : 0,
"offset" : len(bin.binary) + (bin.sizeof_sh() * (bin.ElfHeader.e_shnum + 2)),
"size" : (len(symbols) + 1) * bin.sizeof_sym(),
"link" : bin.ElfHeader.e_shnum + 1, # index of SHT_STRTAB
"info" : 1,
"addralign" : 4,
"entsize" : bin.sizeof_sym()
}
off_strtab = (len(bin.binary) + (bin.sizeof_sh() * (bin.ElfHeader.e_shnum + 2)) + (bin.sizeof_sym() * (len(symbols) + 1)))
strtab = {
"name" : SHN_UNDEF,
"type" : SHTypes.SHT_STRTAB,
"flags" : 0,
"addr" : 0,
"offset" : off_strtab,
"size" : len(strtab_raw),
"link" : 0,
"info" : 0,
"addralign" : 1,
"entsize" : 0
}
shdrs = bin.binary[bin.ElfHeader.e_shoff:bin.ElfHeader.e_shoff + (bin.sizeof_sh() * bin.ElfHeader.e_shnum)]
bin.ElfHeader.e_shnum += 2
bin.ElfHeader.e_shoff = len(bin.binary)
bin.write(0, bin.ElfHeader)
bin.binary.extend(shdrs)
base = bin.binary[bin.ElfHeader.e_shoff:]
_off = bin.ElfHeader.e_shoff
for i in range(bin.ElfHeader.e_shnum - 2):
if bin.getArchMode() == 32:
if bin.ei_data == ELFFlags.ELFDATA2LSB: shdr = Elf32_Shdr_LSB.from_buffer_copy(base)
elif bin.ei_data == ELFFlags.ELFDATA2MSB: shdr = Elf32_Shdr_MSB.from_buffer_copy(base)
elif bin.getArchMode() == 64:
if bin.ei_data == ELFFlags.ELFDATA2LSB: shdr = Elf64_Shdr_LSB.from_buffer_copy(base)
elif bin.ei_data == ELFFlags.ELFDATA2MSB: shdr = Elf64_Shdr_MSB.from_buffer_copy(base)
base = base[bin.ElfHeader.e_shentsize:]
bin.write(_off, shdr)
_off += bin.sizeof_sh()
bin.append_section_header(symtab)
bin.append_section_header(strtab)
# Local symbol - separator
sym = {
"name" : 0,
"value" : 0,
"size" : 0,
"info" : SymFlags.STB_LOCAL,
"other" : 0,
"shndx" : 0
}
bin.append_symbol(sym)
# add symbols
for s in symbols:
sh_idx = bin.get_section_id(s.shname)
if not sh_idx:
log("ERROR: Section ID for '%s' not found" % s.shname)
continue
sym = {
"name" : strtab_raw.index(s.name.encode('ascii')),
"value" : s.value,
"size" : s.size,
"info" : s.info,
"other" : 0,
"shndx" : sh_idx
}
#log("0x%08x - 0x%08x - %s - %d/%d - %d" % (s.value, s.size, s.name, strtab_raw.index(s.name), len(strtab_raw), s.info))
bin.append_symbol(sym)
# add symbol strings
bin.binary.extend(strtab_raw)
log("ELF saved to: %s" % output_file)
bin.save(output_file)
except:
log(traceback.format_exc())
def ida_fcn_filter(func_ea):
if idc.get_segm_name(func_ea) not in ("extern", ".plt"):
return True
return False
def get_ida_symbols():
symbols = []
for f in filter(ida_fcn_filter, Functions()):
func = get_func(f)
seg_name = idc.get_segm_name(f)
fn_name = idc.get_func_name(f)
symbols.append(Symbol(fn_name, STB_GLOBAL_FUNC,
int(func.start_ea), int(func.size()), seg_name))
return symbols
def get_section(addr):
for idx, s in enumerate(r2p.cmdj("iSj")):
if s['vaddr'] <= addr < (s['vaddr'] + s['size']):
return (idx, s['name'])
return None
def r2_fcn_filter(fcn):
if fcn['name'].startswith(("sym.imp", "loc.imp", "section")):
return False
return True
def get_r2_symbols():
symbols = []
for fnc in filter(r2_fcn_filter, r2p.cmdj("aflj")):
sh_idx, sh_name = get_section(fnc['offset'])
fnc_name = fnc['name']
if fnc_name.startswith(("sym","fcn")):
fnc_name = fnc_name[4:]
if fnc_name.startswith("go."):
fnc_name = fnc_name[3:]
symbols.append(Symbol(fnc_name, STB_GLOBAL_FUNC,
fnc['offset'], int(fnc['size']), sh_name))
return symbols
if USE_IDA:
import idc
import ida_nalt
import ida_kernwin
from idaapi import *
from idautils import *
class Syms2Elf(Form):
def __init__(self):
Form.__init__(self, r"""syms2elf
{formChangeCb}
<#Output file#Output ~f~ile:{txtFile}>
""", {
'formChangeCb' : Form.FormChangeCb(self.OnFormChange),
'txtFile' : Form.FileInput(save=True, swidth=50)
})
self.input_elf = ida_nalt.get_input_file_path()
def OnFormChange(self, fid):
if fid == self.txtFile.id:
o_file = self.GetControlValue(self.txtFile)
if os.path.exists(o_file):
s = "Output file already exists\n" \
"The output file already exists. " \
"Do you want to overwrite it?"
if bool(ida_kernwin.ask_form(s, "1")):
os.remove(o_file)
else:
self.SetControlValue(self.txtFile, '')
return 1
def Show(self):
if not self.Compiled():
self.Compile()
if "ELF" in get_file_type_name():
ok = self.Execute()
else:
warning("The input file is not a ELF")
ok = 0
return ok
class Syms2Elf_t(plugin_t):
flags = PLUGIN_UNL
comment = ""
help = ""
wanted_name = PLUG_NAME
wanted_hotkey = ""
def init(self):
return PLUGIN_OK
def run(self, arg=0):
f = Syms2Elf()
if f.Show():
symbols = get_ida_symbols()
output_file = f.txtFile.value
write_symbols(f.input_elf, output_file, symbols)
f.Free()
def term(self):
pass
def PLUGIN_ENTRY():
return Syms2Elf_t()
elif USE_R2:
import r2pipe
r2p = r2pipe.open()
log = log_r2
if len(sys.argv) < 2:
log("Usage: $syms2elf <output file>")
sys.exit(0)
file_info = r2p.cmdj("ij").get("core")
if file_info['format'].lower() in ('elf','elf64'):
symbols = get_r2_symbols()
write_symbols(file_info['file'], sys.argv[1], symbols)
else:
log("The input file is not a ELF")