#!/usr/bin/python3
#***************************************************Project Mutator****************************************************/
# yet another elfdump in python
#*Copyright (C) 2018 Farzad Sadeghi
#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.
#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#GNU General Public License for more details.
#You should have received a copy of the GNU General Public License
#along with this program; if not, write to the Free Software
#Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.*/
#**********************************************************************************************************************/
import argparse
import sys
import readline
import code
import signal
import os
import sys
import shutil
from capstone import *
from capstone.x86 import *
class ELF_TYPE_SIZES:
ELF32_HALF = 2
ELF64_HALF = 2
ELF32_WORD = 4
ELF32_SWORD = 4
ELF64_WORD = 4
ELF64_SWORD = 4
ELF32_XWORD = 8
ELF32_SXWORD = 8
ELF64_XWORD = 8
ELF64_SXWORD = 8
ELF32_ADDR = 4
ELF64_ADDR = 8
ELF32_OFF = 4
ELF64_OFF = 8
ELF32_SECTION = 2
ELF64_SECTION = 2
def SigHandler_SIGINT(signum, frame):
print()
sys.exit(0)
class ExceptionHandler(object):
def __init__(self, globals, locals):
self.variables = globals().copy()
self.variables.update(locals())
self.shell = code.InteractiveConsole()
shell.interact(banner="Object Loader Prototype")
class CLIArgParser(object):
def __init__(self):
parser = argparse.ArgumentParser()
parser.add_argument("--dbg", action="store_true", help="debug", default=False)
parser.add_argument("--obj", type=str, help="path to the executbale, shared object or object you want to load in bruiser")
parser.add_argument("--header", action='store_true', help="dump headers", default=False)
parser.add_argument("--symboltable", action='store_true', help="dump symbol table", default=False)
parser.add_argument("--phdrs", action='store_true', help="dump program haeders", default=False)
parser.add_argument("--shdrs", action='store_true', help="dump section haeders", default=False)
parser.add_argument("--symbolindex", action='store_true', help="dump symbol index", default=False)
parser.add_argument("--stentries", action='store_true', help="dump section table entries", default=False)
parser.add_argument("--objcode", action='store_true', help="dump objects", default=False)
parser.add_argument("--test", action='store_true', help="test switch", default=False)
parser.add_argument("--test2", action='store_true', help="test switch 2", default=False)
parser.add_argument("--funcs", action='store_true', help="dump functions", default=False)
parser.add_argument("--objs", action='store_true', help="dump objects", default=False)
parser.add_argument("--dynsym", action='store_true', help="dump dynamic symbol table", default=False)
parser.add_argument("--dlpath", action='store_true', help="dump dynamic linker path", default=False)
parser.add_argument("--phdynent", action='store_true', help="dump ph PT_DYNAMIC entries", default=False)
parser.add_argument("--section", type=str, help="dump a section")
parser.add_argument("--dumpfunc", type=str, help="dump a functions machine code")
parser.add_argument("--dumpfuncasm", type=str, help="dump a functions assembly code")
parser.add_argument("--textasm", action='store_true', help="disassemble the text section", default=False)
parser.add_argument("--dynsecents", action='store_true', help="dynamic section entries", default=False)
parser.add_argument("--reladyn", action='store_true', help=".rela.dyn entries", default=False)
parser.add_argument("--relaplt", action='store_true', help=".rela.plt entries", default=False)
parser.add_argument("--rodata", action='store_true', help="dump .rodata", default=False)
parser.add_argument("--disass", type=str, help="disassemblt a section")
self.args = parser.parse_args()
if self.args.obj is None:
raise Exception("no object file provided. please specify an object with --obj.")
def byte2int(value,sign = False):
return int.from_bytes(value, byteorder="little", signed=sign)
def byte2hex(value):
return hex(int.from_bytes(value, byteorder="little", signed=False))
def LEB128UnsignedDecode(bytelist):
result = 0
shift = 0
for byte in bytelist:
result |= (byte & 0x7f) << shift
if (byte & 0x80) == 0:
break
shift += 7
return(result)
def LEB128SignedDecode(bytelist):
result = 0
shift = 0
for byte in bytelist:
result |= (byte & 0x7f) << shift
last_byte = byte
shift += 7
if (byte & 0x80) == 0:
break
if last_byte & 0x40:
result |= - (1 << shift)
return(result)
def LEB128UnsignedEncode(int_val):
if int_val < 0:
raise Exception("value must not be negative")
elif int_val == 0:
return bytes([0])
byte_array = bytearray()
while int_val:
byte = int_val & 0x7f
byte_array.append(byte | 0x80)
int_val >>= 7
byte_array[-1] ^= 0x80
return(byte_array)
def LEB128SignedEncode(int_val):
byte_array = bytearray()
while True:
byte = int_val & 0x7f
byte_array.append(byte | 0x80)
int_val >>= 7
if (int_val == 0 and byte&0x40 == 0) or (int_val == -1 and byte&0x40):
byte_array[-1] ^= 0x80
break
return(byte_array)
class ELF_REL():
def __init__(self, r_offset, r_info):
self.r_offset = r_offset
self.r_info = r_info
class ELF_RELA():
def __init__(self, r_offset, r_info, r_addend):
self.r_offset = r_offset
self.r_info = r_info
self.r_addend = r_addend
def ffs(offset,header_list, numbered, *args):
cn = Colors.green
ch = Colors.cyan
cd = Colors.blue
cb = Colors.BOLD
ci = Colors.red
ce = Colors.ENDC
max_column_width = []
lines = []
numbers_f = []
dummy = []
if numbered:
numbers_f.extend(range(1, len(args[-1])+1))
max_column_width.append(max([len(repr(number)) for number in numbers_f]))
header_list.insert(0, "idx")
for arg in args:
max_column_width.append(max([len(repr(argette)) for argette in arg]))
index = range(0, len(header_list))
for header, width, i in zip(header_list, max_column_width, index):
max_column_width[i] = max(len(header), width) + offset
for i in index:
dummy.append(ch + cb + header_list[i].ljust(max_column_width[i]) + ce)
lines.append("".join(dummy))
dummy.clear()
index2 = range(0, len(args[-1]))
for i in index2:
if numbered:
dummy.append(ci+cb+repr(i).ljust(max_column_width[0])+ce)
for arg, width in zip(args, max_column_width[1:]):
dummy.append(cd+repr(arg[i]).ljust(width)+ce)
else:
for arg, width in zip(args, max_column_width):
dummy.append(cd+repr(arg[i]).ljust(width)+ce)
lines.append("".join(dummy))
dummy.clear()
return lines
def get_section_type_string(number):
if number == 0x0: return "NULL"
if number == 0x1: return "PROGBITS"
if number == 0x2: return "SYMTAB"
if number == 0x3: return "STRTAB"
if number == 0x4: return "RELA"
if number == 0x5: return "HASH"
if number == 0x6: return "DYNAMIC"
if number == 0x7: return "NOTE"
if number == 0x8: return "NOBITS"
if number == 0x9: return "REL"
if number == 0xa: return "SHLIB"
if number == 0xb: return "DYNSYM"
if number == 0xe: return "INIT_ARRAY"
if number == 0xf: return "FINI_ARRAY"
if number == 0x10: return "PREINIT"
if number == 0x11: return "GROUP"
if number == 0x12: return "SYMTAB"
if number == 0x13: return "NUM"
if number == 0x60000000: return "LOOS"
if number == 0x6ffffff6: return "GNU_HASH"
if number == 0x6fffffff: return "VERSYM"
if number == 0x6ffffffe: return "VERNEED"
class sh_type_e:
SHT_NULL = 0x0
SHT_PROGBITS = 0x1
SHT_SYMTAB = 0x2
SHT_STRTAB = 0x3
SHT_RELA = 0x4
SHT_HASH = 0x5
SHT_DYNAMIC = 0x6
SHT_NOTE = 0x7
SHT_NOBITS = 0x8
SHT_REL = 0x9
SHT_SHLIB = 0xa
SHT_DYNSYM = 0xb
SHT_INIT_ARRAY = 0xe
SHT_FINI_ARRAY = 0xf
SHT_PREINIT = 0x10
SHT_GROUP = 0x11
SHT_SYMTAB_SHNDX = 0x12
SHT_NUM = 0x13
SHT_LOOS = 0x60000000
GNU_HASH = 0x6ffffff6
VERSYM = 0x6fffffff
VERNEED= 0x6ffffffe
class sh_flags_e:
SHF_WRITE = 0x1
SHF_ALLOC = 0x2
SHF_EXECINSTR = 0x4
SHF_MERGE = 0x10
SHF_STRINGS = 0x20
SHF_INFO_LINK = 0x40
SHF_LINK_ORDER = 0x80
SHF_OS_NONCONFORMING = 0x100
SHF_GROUP = 0x200
SHF_TLS = 0x400
SHF_MASKOS = 0x0ff00000
SHF_MASKPROC = 0xf0000000
SHF_ORDERED = 0x4000000
SHF_EXCLUDE = 0x8000000
class p_type_e:
PT_NULL = 0x0
PT_LOAD = 0x1
PT_DYNAMIC = 0x2
PT_INTERP = 0x3
PT_NOTE = 0x4
PT_SHLIB = 0x5
PT_PHDR = 0x6
PT_LOOS = 0x60000000
PT_HIOS = 0x6FFFFFFF
PT_LOPROC = 0x70000000
PT_HIPROC = 0x7FFFFFFF
GNU_EH_FRAME = 0x6474e550
GNU_STACK = 0x6474e551
GNU_RELRO = 0x6474e552
def get_ph_type(value):
if value == p_type_e.PT_NULL: return "NULL"
elif value == p_type_e.PT_LOAD: return "LOAD"
elif value == p_type_e.PT_DYNAMIC: return "DYNAMIC"
elif value == p_type_e.PT_INTERP: return "INTERP"
elif value == p_type_e.PT_NOTE: return "NOTE"
elif value == p_type_e.PT_SHLIB: return "SHLIB"
elif value == p_type_e.PT_PHDR: return "PHDR"
elif value == p_type_e.PT_LOOS: return "LOOS"
elif value == p_type_e.PT_HIOS: return "HIOS"
elif value == p_type_e.PT_LOPROC: return "LOPROC"
elif value == p_type_e.PT_HIPROC: return "HIPROC"
elif value == p_type_e.GNU_EH_FRAME: return "GNU_EH_FRAME"
elif value == p_type_e.GNU_STACK: return "GNU_STACK"
elif value == p_type_e.GNU_RELRO: return "GNU_RELRO"
else: return None
class ph_dynamic_entry:
def __init__(self, d_tag, d_un):
self.d_tag = d_tag;
self.d_un = d_un
class elf_seg_flags:
PF_X = 0x1
PF_W = 0x2
PF_R = 0x4
def get_elf_seg_flag(value):
ret = []
if value & 0x01 == 1: ret.append("X")
if (value & 0x02) >> 1 == 1: ret.append("W")
if (value & 0x04) >> 2 == 1: ret.append("R")
return ''.join(ret)
class PH_DYN_TAG_TYPE:
DT_NULL = 0
DT_NEEDED = 1
DT_PLTRELSZ = 2
DT_PLTGOT = 3
DT_HASH = 4
DT_STRTAB = 5
DT_SYMTAB = 6
DT_RELA = 7
DT_RELASZ = 8
DT_RELAENT = 9
DT_STRSZ = 10
DT_SYMENT = 11
DT_INIT = 12
DT_FINI = 13
DT_SONAME = 14
DT_RPATH = 15
DT_SYMBOLIC = 16
DT_REL = 17
DT_RELSZ = 18
DT_RELENT = 19
DT_PLTREL = 20
DT_DEBUG = 21
DT_TEXTREL = 22
DT_JMPREL = 23
DT_LOPROC = 0x70000000
DT_HIPROC = 0x7FFFFFFF
DT_BIND_NOW = 24
DT_INIT_ARRAY = 25
DT_FINI_ARRAY = 26
DT_INIT_ARRAYSZ = 27
DT_FINI_ARRAYSZ = 28
DT_RUNPATH = 29
DT_FLAGS = 30
DT_ENCODING = 32
DT_PREINIT_ARRAY = 32
DT_PREINIT_ARRAYSZ = 33
DT_NUM = 34
DT_LOOS = 0x6000000d
DT_HIOS = 0x6ffff000
DT_PROC_NUM = 0x0
DT_MIPS_NUM = 0x0
DT_VALRNGLO = 0x6ffffd00
DT_GNU_PRELINKED = 0x6ffffdf5
DT_GNU_CONFLICTSZ = 0x6ffffdf6
DT_GNU_LIBLISTSZ = 0x6ffffdf7
DT_CHECKSUM = 0x6ffffdf8
DT_PLTPADSZ = 0x6ffffdf9
DT_MOVEENT = 0x6ffffdfa
DT_MOVESZ = 0x6ffffdfb
DT_FEATURE_1 = 0x6ffffdfc
DT_POSFLAG_1 = 0x6ffffdfd
DT_SYMINSZ = 0x6ffffdfe
DT_SYMINENT = 0x6ffffdff
DT_VALRNGHI = 0x6ffffdff
DT_VALNUM = 12
DT_ADDRRNGLO = 0x6ffffe00
DT_GNU_HASH = 0x6ffffef5
DT_TLSDESC_PLT = 0x6ffffef6
DT_TLSDESC_GOT = 0x6ffffef7
DT_GNU_CONFLICT = 0x6ffffef8
DT_GNU_LIBLIST = 0x6ffffef9
DT_CONFIG = 0x6ffffefa
DT_DEPAUDIT = 0x6ffffefb
DT_AUDIT = 0x6ffffefc
DT_PLTPAD = 0x6ffffefd
DT_MOVETAB = 0x6ffffefe
DT_SYMINFO = 0x6ffffeff
DT_ADDRRNGHI = 0x6ffffeff
DT_ADDRNUM = 11
DT_VERSYM = 0x6ffffff0
DT_RELACOUNT = 0x6ffffff9
DT_RELCOUNT = 0x6ffffffa
DT_FLAGS_1 = 0x6ffffffb
DT_VERDEF = 0x6ffffffc
DT_VERDEFNUM = 0x6ffffffd
DT_VERNEED = 0x6ffffffe
DT_VERNEEDNUM = 0x6fffffff
DT_VERSIONTAGNUM = 16
DT_AUXILIARY = 0x7ffffffd
DT_FILTER = 0x7fffffff
DT_EXTRANUM = 3
def get_ph_dynamic_ent_tag_type(value):
if value == PH_DYN_TAG_TYPE.DT_NULL: return "DT_NULL"
elif value == PH_DYN_TAG_TYPE.DT_NEEDED: return "DT_NEEDED"
elif value == PH_DYN_TAG_TYPE.DT_PLTRELSZ: return "DT_PLTRELSZ"
elif value == PH_DYN_TAG_TYPE.DT_PLTGOT: return "DT_PLTGOT"
elif value == PH_DYN_TAG_TYPE.DT_HASH: return "DT_HASH"
elif value == PH_DYN_TAG_TYPE.DT_STRTAB: return "DT_STRTAB"
elif value == PH_DYN_TAG_TYPE.DT_SYMTAB: return "DT_SYMTAB"
elif value == PH_DYN_TAG_TYPE.DT_RELA: return "DT_RELA"
elif value == PH_DYN_TAG_TYPE.DT_RELASZ: return "DT_RELASZ"
elif value == PH_DYN_TAG_TYPE.DT_RELAENT: return "DT_RELAENT"
elif value == PH_DYN_TAG_TYPE.DT_STRSZ: return "DT_STRSZ"
elif value == PH_DYN_TAG_TYPE.DT_SYMENT: return "DT_SYMENT"
elif value == PH_DYN_TAG_TYPE.DT_INIT: return "DT_INIT"
elif value == PH_DYN_TAG_TYPE.DT_FINI: return "DT_FINI"
elif value == PH_DYN_TAG_TYPE.DT_SONAME: return "DT_SONAME"
elif value == PH_DYN_TAG_TYPE.DT_RPATH: return "DT_RPATH"
elif value == PH_DYN_TAG_TYPE.DT_SYMBOLIC: return "DT_SYMBOLIC"
elif value == PH_DYN_TAG_TYPE.DT_REL: return "DT_REL"
elif value == PH_DYN_TAG_TYPE.DT_RELSZ: return "DT_RELSZ"
elif value == PH_DYN_TAG_TYPE.DT_RELENT: return "DT_RELENT"
elif value == PH_DYN_TAG_TYPE.DT_PLTREL: return "DT_PLTREL"
elif value == PH_DYN_TAG_TYPE.DT_DEBUG: return "DT_DEBUG"
elif value == PH_DYN_TAG_TYPE.DT_TEXTREL: return "DT_TEXTREL"
elif value == PH_DYN_TAG_TYPE.DT_JMPREL: return "DT_JMPREL"
elif value == PH_DYN_TAG_TYPE.DT_LOPROC: return "DT_LOPROC"
elif value == PH_DYN_TAG_TYPE.DT_HIPROC: return "DT_HIPROC"
elif value == PH_DYN_TAG_TYPE.DT_BIND_NOW: return "DT_BIND_NOW"
elif value == PH_DYN_TAG_TYPE.DT_INIT_ARRAY: return "DT_INIT_ARRAY"
elif value == PH_DYN_TAG_TYPE.DT_FINI_ARRAY: return "DT_FINI_ARRAY"
elif value == PH_DYN_TAG_TYPE.DT_INIT_ARRAYSZ: return "DT_INIT_ARRAYSZ"
elif value == PH_DYN_TAG_TYPE.DT_FINI_ARRAYSZ: return "DT_FINI_ARRAYSZ"
elif value == PH_DYN_TAG_TYPE.DT_RUNPATH: return "DT_RUNPATH"
elif value == PH_DYN_TAG_TYPE.DT_FLAGS: return "DT_FLAGS"
elif value == PH_DYN_TAG_TYPE.DT_ENCODING: return "DT_ENCODING"
elif value == PH_DYN_TAG_TYPE.DT_PREINIT_ARRAY: return "DT_PREINIT_ARRAY"
elif value == PH_DYN_TAG_TYPE.DT_PREINIT_ARRAYSZ: return "DT_PREINIT_ARRAYSZ"
elif value == PH_DYN_TAG_TYPE.DT_NUM: return "DT_NUM"
elif value == PH_DYN_TAG_TYPE.DT_LOOS: return "DT_LOOS"
elif value == PH_DYN_TAG_TYPE.DT_HIOS: return "DT_HIOS"
#elif value == PH_DYN_TAG_TYPE.DT_PROC_NUM: return "DT_PROC_NUM"
#elif value == PH_DYN_TAG_TYPE.DT_MIPS_NUM: return "DT_MIPS_NUM"
elif value == PH_DYN_TAG_TYPE.DT_VALRNGLO: return "DT_VALRNGLO"
elif value == PH_DYN_TAG_TYPE.DT_GNU_PRELINKED: return "DT_GNU_PRELINKED"
elif value == PH_DYN_TAG_TYPE.DT_GNU_CONFLICTSZ: return "DT_GNU_CONFLICTSZ"
elif value == PH_DYN_TAG_TYPE.DT_GNU_LIBLISTSZ: return "DT_GNU_LIBLISTSZ"
elif value == PH_DYN_TAG_TYPE.DT_CHECKSUM: return "DT_CHECKSUM"
elif value == PH_DYN_TAG_TYPE.DT_PLTPADSZ: return "DT_PLTPADSZ"
elif value == PH_DYN_TAG_TYPE.DT_MOVEENT: return "DT_MOVEENT"
elif value == PH_DYN_TAG_TYPE.DT_MOVESZ: return "DT_MOVESZ"
elif value == PH_DYN_TAG_TYPE.DT_FEATURE_1: return "DT_FEATURE_1"
elif value == PH_DYN_TAG_TYPE.DT_POSFLAG_1: return "DT_POSFLAG_1"
elif value == PH_DYN_TAG_TYPE.DT_SYMINSZ: return "DT_SYMINSZ"
elif value == PH_DYN_TAG_TYPE.DT_SYMINENT: return "DT_SYMINENT"
elif value == PH_DYN_TAG_TYPE.DT_VALRNGHI: return "DT_VALRNGHI"
#DT_VALNUM = 12
elif value == PH_DYN_TAG_TYPE.DT_ADDRRNGLO: return "DT_ADDRRNGLO"
elif value == PH_DYN_TAG_TYPE.DT_GNU_HASH: return "DT_GNU_HASH"
elif value == PH_DYN_TAG_TYPE.DT_TLSDESC_PLT: return "DT_TLSDESC_PLT"
elif value == PH_DYN_TAG_TYPE.DT_TLSDESC_GOT: return "DT_TLSDESC_GOT"
elif value == PH_DYN_TAG_TYPE.DT_GNU_CONFLICT: return "DT_GNU_CONFLICT"
elif value == PH_DYN_TAG_TYPE.DT_GNU_LIBLIST: return "DT_GNU_LIBLIST"
elif value == PH_DYN_TAG_TYPE.DT_CONFIG: return "DT_CONFIG"
elif value == PH_DYN_TAG_TYPE.DT_DEPAUDIT: return "DT_DEPAUDIT"
elif value == PH_DYN_TAG_TYPE.DT_AUDIT: return "DT_AUDIT"
elif value == PH_DYN_TAG_TYPE.DT_PLTPAD: return "DT_PLTPAD"
elif value == PH_DYN_TAG_TYPE.DT_MOVETAB: return "DT_MOVETAB"
elif value == PH_DYN_TAG_TYPE.DT_SYMINFO: return "DT_SYMINFO"
elif value == PH_DYN_TAG_TYPE.DT_ADDRRNGHI: return "DT_ADDRRNGHI"
#DT_ADDRNUM = 11
elif value == PH_DYN_TAG_TYPE.DT_VERSYM: return "DT_VERSYM"
elif value == PH_DYN_TAG_TYPE.DT_RELACOUNT: return "DT_RELACOUNT"
elif value == PH_DYN_TAG_TYPE.DT_RELCOUNT: return "DT_RELCOUNT"
elif value == PH_DYN_TAG_TYPE.DT_FLAGS_1: return "DT_FLAGS_1"
elif value == PH_DYN_TAG_TYPE.DT_VERDEF: return "DT_VERDEF"
elif value == PH_DYN_TAG_TYPE.DT_VERDEFNUM: return "DT_VERDEFNUM"
elif value == PH_DYN_TAG_TYPE.DT_VERNEED: return "DT_VERNEED"
elif value == PH_DYN_TAG_TYPE.DT_VERNEEDNUM: return "DT_VERNEEDNUM"
elif value == PH_DYN_TAG_TYPE.DT_VERSIONTAGNUM: return "DT_VERSIONTAGNUM"
elif value == PH_DYN_TAG_TYPE.DT_AUXILIARY: return "DT_AUXILIARY"
elif value == PH_DYN_TAG_TYPE.DT_FILTER: return "DT_FILTER"
#DT_EXTRANUM = 3
else: return str(value)
#else: return "UNKNOWN"
class X86_REL_TYPE:
R_386_NONE = 0
R_386_32 = 1
R_386_PC32 = 2
R_386_GOT32 = 3
R_386_PLT32 = 4
R_386_COPY = 5
R_386_GLOB_DAT = 6
R_386_JMP_SLOT = 7
R_386_RELATIVE = 8
R_386_GOTOFF = 9
R_386_GOTPC = 10
R_386_32PLT = 11
R_386_16 = 12
R_386_PC16 = 13
R_386_8 = 14
R_386_PC8 = 15
R_386_SIZE32 = 16
def get_x86_rel_type(val):
if val == X86_REL_TYPE.R_386_NONE: return "R_386_NONE"
elif val == X86_REL_TYPE.R_386_32: return "R_386_32"
elif val == X86_REL_TYPE.R_386_PC32: return "R_386_PC32"
elif val == X86_REL_TYPE.R_386_GOT32: return "R_386_GOT32"
elif val == X86_REL_TYPE.R_386_PLT32: return "R_386_PLT32"
elif val == X86_REL_TYPE.R_386_COPY: return "R_386_COPY"
elif val == X86_REL_TYPE.R_386_GLOB_DAT: return "R_386_GLOB_DAT"
elif val == X86_REL_TYPE.R_386_JMP_SLOT: return "R_386_JMP_SLOT"
elif val == X86_REL_TYPE.R_386_RELATIVE: return "R_386_RELATIVE"
elif val == X86_REL_TYPE.R_386_GOTOFF: return "R_386_GOTOFF"
elif val == X86_REL_TYPE.R_386_GOTPC: return "R_386_GOTPC"
elif val == X86_REL_TYPE.R_386_32PLT: return "R_386_32PLT"
elif val == X86_REL_TYPE.R_386_16: return "R_386_16"
elif val == X86_REL_TYPE.R_386_PC16: return "R_386_PC16"
elif val == X86_REL_TYPE.R_386_8: return "R_386_8"
elif val == X86_REL_TYPE.R_386_PC8: return "R_386_PC8"
elif val == X86_REL_TYPE.R_386_SIZE32: return "R_386_SIZE32"
else: return "UNKNOWN"
class X86_64_REL_TYPE:
R_AMD64_NONE = 0
R_AMD64_64 = 1
R_AMD64_PC32 = 2
R_AMD64_GOT32 = 3
R_AMD64_PLT32 = 4
R_AMD64_COPY = 5
R_AMD64_GLOB_DAT = 6
R_AMD64_JUMP_SLOT = 7
R_AMD64_RELATIVE = 8
R_AMD64_GOTPCREL = 9
R_AMD64_32 = 10
R_AMD64_32S = 11
R_AMD64_16 = 12
R_AMD64_PC16 = 13
R_AMD64_8 = 14
R_AMD64_PC8 = 15
R_AMD64_PC64 = 24
R_AMD64_GOTOFF64 = 25
R_AMD64_GOTPC32 = 26
R_AMD64_SIZE32 = 32
R_AMD64_SIZE64 = 33
def get_x86_64_rel_type(val):
if val == X86_64_REL_TYPE.R_AMD64_NONE: return "R_386_NONE"
elif val == X86_64_REL_TYPE.R_AMD64_64: return "R_AMD64_64"
elif val == X86_64_REL_TYPE.R_AMD64_PC32: return "R_AMD64_PC32"
elif val == X86_64_REL_TYPE.R_AMD64_GOT32: return "R_AMD64_GOT32"
elif val == X86_64_REL_TYPE.R_AMD64_PLT32: return "R_AMD64_PLT32"
elif val == X86_64_REL_TYPE.R_AMD64_COPY: return "R_AMD64_COPY"
elif val == X86_64_REL_TYPE.R_AMD64_GLOB_DAT: return "R_AMD64_GLOB_DAT"
elif val == X86_64_REL_TYPE.R_AMD64_JUMP_SLOT: return "R_AMD64_JUMP_SLOT"
elif val == X86_64_REL_TYPE.R_AMD64_RELATIVE: return "R_AMD64_RELATIVE"
elif val == X86_64_REL_TYPE.R_AMD64_GOTPCREL: return "R_AMD64_GOTPCREL"
elif val == X86_64_REL_TYPE.R_AMD64_32: return "R_AMD64_32"
elif val == X86_64_REL_TYPE.R_AMD64_32S: return "R_AMD64_32S"
elif val == X86_64_REL_TYPE.R_AMD64_16: return "R_AMD64_16"
elif val == X86_64_REL_TYPE.R_AMD64_PC16: return "R_AMD64_PC16"
elif val == X86_64_REL_TYPE.R_AMD64_8: return "R_AMD64_8"
elif val == X86_64_REL_TYPE.R_AMD64_PC8: return "R_AMD64_PC8"
elif val == X86_64_REL_TYPE.R_AMD64_PC64: return "R_AMD64_PC64"
elif val == X86_64_REL_TYPE.R_AMD64_GOTOFF64: return "R_AMD64_GOTOFF64"
elif val == X86_64_REL_TYPE.R_AMD64_GOTPC32: return "R_AMD64_GOTPC32"
elif val == X86_64_REL_TYPE.R_AMD64_SIZE32: return "R_AMD64_SIZE32"
elif val == X86_64_REL_TYPE.R_AMD64_SIZE64: return "R_AMD64_SIZE64"
else: return "UNKNOWN"
class ELF_ST_BIND:
STB_LOCAL = 0
STB_GLOBAL = 1
STB_WEAK = 2
STB_LOOS = 10
STB_HIOS = 12
STB_LOPROC = 13
STB_HIPROC = 15
def get_elf_st_bind_string(value):
if value == ELF_ST_BIND.STB_LOCAL: return "STB_LOCAL"
elif value == ELF_ST_BIND.STB_GLOBAL: return "STB_GLOBAL"
elif value == ELF_ST_BIND.STB_WEAK: return "STB_WEAK"
elif value == ELF_ST_BIND.STB_LOOS: return "STB_LOOS"
elif value == ELF_ST_BIND.STB_HIOS: return "STB_HIOS"
elif value == ELF_ST_BIND.STB_LOPROC: return "STB_LOPROC"
elif value == ELF_ST_BIND.STB_LOPROC: return "STB_HIPROC"
else: return None
class ELF_ST_TYPE:
STT_NOTYPE = 0
STT_OBJECT = 1
STT_FUNC = 2
STT_SECTION = 3
STT_FILE = 4
STT_COMMON = 5
STT_TLS = 6
STT_LOOS = 10
STT_HIOS = 12
STT_LOPROC = 13
STT_SPARC_REGISTER = 13
STT_HIPROC = 15
def get_elf_st_type_string(value):
if value == ELF_ST_TYPE.STT_NOTYPE: return "STT_NOTYPE"
elif value == ELF_ST_TYPE.STT_OBJECT: return "STT_OBJECT"
elif value == ELF_ST_TYPE.STT_FUNC: return "STT_FUNC"
elif value == ELF_ST_TYPE.STT_SECTION: return "STT_SECTION"
elif value == ELF_ST_TYPE.STT_FILE: return "STT_FILE"
elif value == ELF_ST_TYPE.STT_COMMON: return "STT_COMMON"
elif value == ELF_ST_TYPE.STT_TLS: return "STT_TLS"
elif value == ELF_ST_TYPE.STT_LOOS: return "STT_LOOS"
elif value == ELF_ST_TYPE.STT_HIOS: return "STT_HIOS"
elif value == ELF_ST_TYPE.STT_LOPROC: return "STT_LOPROC"
elif value == ELF_ST_TYPE.STT_SPARC_REGISTER: return "STT_SPARC_REGISTER"
elif value == ELF_ST_TYPE.STT_HIPROC: return "STT_HIPROC"
else: return None
class ELF_VIS:
STV_DEFAULT = 0
STV_INTERNAL = 1
STV_HIDDEN = 2
STV_PROTECTED = 3
STV_EXPORTED = 4
STV_SINGLETON = 5
STV_ELIMINATE = 6
def get_elf_vis_string(value):
if value == ELF_VIS.STV_DEFAULT: return "STV_DEFAULT"
elif value == ELF_VIS.STV_INTERNAL: return "STV_INTERNAL"
elif value == ELF_VIS.STV_HIDDEN: return "STV_HIDDEN"
elif value == ELF_VIS.STV_PROTECTED: return "STV_PROTECTED"
elif value == ELF_VIS.STV_EXPORTED: return "STV_EXPORTED"
elif value == ELF_VIS.STV_SINGLETON: return "STV_SINGLETON"
elif value == ELF_VIS.STV_ELIMINATE: return "STV_ELIMINATE"
else: return None
class Colors:
purple = '\033[95m'
blue = '\033[94m'
green = '\033[92m'
yellow = '\033[93m'
red = '\033[91m'
grey = '\033[1;37m'
darkgrey = '\033[1;30m'
cyan = '\033[1;36m'
ENDC = '\033[0m'
BOLD = '\033[1m'
UNDERLINE = '\033[4m'
def openSO_r(path):
so = open(path, "rb")
return so
def openSO_w(path):
so = open(path, "wb")
return so
class ELFHDR():
def __init__(self, ei_mag, ei_class, ei_data, ei_version, ei_osabi, ei_abiversion,
ei_pad, e_type, e_machine, e_version, e_entry, e_phoff,
e_shoff, e_flags, e_ehsize, e_phentsize, e_phnum, e_shentsize,
e_shnum, e_shstrndx):
self.ei_mag = ei_mag
self.ei_class = ei_class
self.ei_data = ei_data
self.ei_version = ei_version
self.ei_osabi = ei_osabi
self.ei_abiversion = ei_abiversion
self.ei_pad = ei_pad
self.e_type = e_type
self.e_machine = e_machine
self.e_version = e_version
self.e_entry = e_entry
self.e_phoff = e_phoff
self.e_shoff = e_shoff
self.e_flags = e_flags
self.e_ehsize = e_ehsize
self.e_phentsize = e_phentsize
self.e_phnum = e_phnum
self.e_shentsize = e_shentsize
self.e_shnum = e_shnum
self.e_shstrndx = e_shstrndx
class PHDR():
def __init__(self, p_type, p_flags, p_offset, p_vaddr, p_paddr, p_filesz,
p_memsz, p_flags2, p_align):
self.p_type = p_type
self.p_flags = p_flags
self.p_offset = p_offset
self.p_vaddr = p_vaddr
self.p_paddr = p_paddr
self.p_filesz = p_filesz
self.p_memsz = p_memsz
self.p_flags2 = p_flags2
self.p_align = p_align
class SHDR():
def __init__(self, sh_name, sh_type, sh_flags, sh_addr, sh_offset, sh_size,
sh_link, sh_info, sh_addralign, sh_entsize):
self.sh_name = sh_name
self.sh_type = sh_type
self.sh_flags = sh_flags
self.sh_addr = sh_addr
self.sh_offset = sh_offset
self.sh_size = sh_size
self.sh_link = sh_link
self.sh_info = sh_info
self.sh_addralign = sh_addralign
self.sh_entsize = sh_entsize
class Symbol_Table_Entry64():
def __init__(self, st_name, st_info, st_other, st_shndx, st_value, st_size, st_bind, st_type):
self.st_name = st_name
self.st_info = st_info
self.st_other = st_other
self.st_shndx = st_shndx
self.st_value = st_value
self.st_size = st_size
self.st_bind = st_bind
self.st_type = st_type
class ELF(object):
def __init__(self, so):
self.so = so
self.so.seek(0, 0)
self.elfhdr = ELFHDR(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0)
self.phdr = []
self.shhdr = []
self.size = int()
self.string_tb_e = []
self.string_tb_e_dyn = []
self.symbol_table_e = []
self.data_section = []
self.text_section = []
self.dlpath = str()
self.ph_dyn_ent = []
self.dyn_section = []
self.dyn_section_ents = []
self.rela_dyn = []
self.rela_dyn_ents = []
self.rela_plt = []
self.rela_plt_ents = []
self.rodata = []
def init(self, size):
self.size = size
self.read_ELF_H(size)
self.so.seek(byte2int(self.elfhdr.e_phoff))
phnum = byte2int(self.elfhdr.e_phnum)
for i in range(0, phnum):
self.read_PHDR(size)
self.so.seek(byte2int(self.elfhdr.e_shoff))
shnum = byte2int(self.elfhdr.e_shnum)
for i in range(0, shnum):
self.read_SHDR(size)
for i in range(0, shnum):
type = byte2int(self.shhdr[i].sh_type)
if type == sh_type_e.SHT_SYMTAB:
self.so.seek(byte2int(self.shhdr[i].sh_offset), 0)
symbol_tb = self.so.read(byte2int(self.shhdr[i].sh_size))
offset = 0
num = int(byte2int(self.shhdr[i].sh_size) / 24)
for j in range(0, num):
self.read_st_entry(symbol_tb[offset:offset + 24], self.string_tb_e)
offset += 24
if type == sh_type_e.SHT_DYNSYM:
self.so.seek(byte2int(self.shhdr[i].sh_offset), 0)
symbol_tb = self.so.read(byte2int(self.shhdr[i].sh_size))
offset = 0
num = int(byte2int(self.shhdr[i].sh_size) / 24)
for j in range(0, num):
self.read_st_entry(symbol_tb[offset:offset + 24], self.string_tb_e_dyn)
offset += 24
self.pop_data_section()
self.pop_text_section()
self.get_ph_dyn_entries()
self.pop_dynamic_entries(".dynamic", self.dyn_section_ents)
self.pop_rela(".rela.plt", self.rela_plt, self.rela_plt_ents)
self.pop_rela(".rela.dyn", self.rela_dyn, self.rela_dyn_ents)
#self.pop_rel()
def read_ELF_H(self, size):
self.elfhdr.ei_mag = self.so.read(4)
self.elfhdr.ei_class = self.so.read(1)
self.elfhdr.ei_data = self.so.read(1)
self.elfhdr.ei_version = self.so.read(1)
self.elfhdr.ei_osabi = self.so.read(1)
self.elfhdr.ei_abiversion = self.so.read(1)
self.elfhdr.ei_pad = self.so.read(7)
self.elfhdr.e_type = self.so.read(2)
self.elfhdr.e_machine = self.so.read(2)
self.elfhdr.e_version = self.so.read(4)
if size == 32: self.elfhdr.e_entry = self.so.read(4)
elif size == 64: self.elfhdr.e_entry = self.so.read(8)
if size == 32: self.elfhdr.e_phoff = self.so.read(4)
elif size == 64: self.elfhdr.e_phoff = self.so.read(8)
if size == 32: self.elfhdr.e_shoff = self.so.read(4)
elif size == 64: self.elfhdr.e_shoff = self.so.read(8)
self.elfhdr.e_flags = self.so.read(4)
self.elfhdr.e_ehsize = self.so.read(2)
self.elfhdr.e_phentsize = self.so.read(2)
self.elfhdr.e_phnum = self.so.read(2)
self.elfhdr.e_shentsize = self.so.read(2)
self.elfhdr.e_shnum = self.so.read(2)
self.elfhdr.e_shstrndx = self.so.read(2)
def read_PHDR(self, size):
dummy = PHDR(0,0,0,0,0,0,0,0,0)
dummy.p_type = self.so.read(4)
if size == 64: dummy.p_flags = self.so.read(4)
if size == 32: dummy.p_offset = self.so.read(4)
elif size == 64: dummy.p_offset = self.so.read(8)
if size == 32: dummy.p_vaddr = self.so.read(4)
elif size == 64: dummy.p_vaddr = self.so.read(8)
if size == 32: dummy.p_paddr = self.so.read(4)
elif size == 64: dummy.p_paddr = self.so.read(8)
if size == 32: dummy.p_filesz = self.so.read(4)
elif size == 64: dummy.p_filesz = self.so.read(8)
if size == 32: dummy.p_memsz = self.so.read(4)
elif size == 64: dummy.p_memsz = self.so.read(8)
if size == 32: dummy.p_flags2 = self.so.read(4)
elif size == 64: pass
if size == 32: dummy.p_align = self.so.read(4)
elif size == 64: dummy.p_align = self.so.read(8)
self.phdr.append(dummy)
def read_SHDR(self, size):
dummy = SHDR(0,0,0,0,0,0,0,0,0,0)
dummy.sh_name = self.so.read(4)
dummy.sh_type = self.so.read(4)
if size == 32: dummy.sh_flags = self.so.read(4)
elif size == 64: dummy.sh_flags = self.so.read(8)
if size == 32: dummy.sh_addr = self.so.read(4)
elif size == 64: dummy.sh_addr = self.so.read(8)
if size == 32: dummy.sh_offset = self.so.read(4)
elif size == 64: dummy.sh_offset = self.so.read(8)
if size == 32: dummy.sh_size = self.so.read(4)
elif size == 64: dummy.sh_size = self.so.read(8)
dummy.sh_link = self.so.read(4)
dummy.sh_info = self.so.read(4)
if size == 32: dummy.sh_addralign = self.so.read(4)
elif size == 64: dummy.sh_addralign = self.so.read(8)
if size == 32: dummy.sh_entsize = self.so.read(4)
elif size == 64: dummy.sh_entsize = self.so.read(8)
self.shhdr.append(dummy)
def read_st_entry(self, st, entry_list):
dummy = Symbol_Table_Entry64(0,0,0,0,0,0,0,0)
dummy.st_name = st[0:4]
dummy.st_info = st[4:5]
dummy.st_other = st[5:6]
dummy.st_shndx = st[6:8]
dummy.st_value = st[8:16]
dummy.st_size = st[16:24]
dummy.st_bind = byte2int(dummy.st_info) >> 4
dummy.st_type = byte2int(dummy.st_info) & 0x0f
entry_list.append(dummy)
def read_section_name(self, index):
shstrtab_index = byte2int(self.elfhdr.e_shstrndx)
name = []
self.so.seek(byte2int(self.shhdr[shstrtab_index].sh_offset), 0)
strings = self.so.read(byte2int(self.shhdr[shstrtab_index].sh_size))
char = strings[index]
while chr(char) != "\0":
index += 1
name.append(chr(char))
char = strings[index]
return ''.join(name)
def get_ph_dyn_entries(self):
size = 0
for phdr in self.phdr:
if byte2int(phdr.p_type) == p_type_e.PT_DYNAMIC:
self.so.seek(byte2int(phdr.p_offset), 0)
size = byte2int(phdr.p_filesz)
ph_dyn = self.so.read(size)
for i in range(int(size/8)):
d_tag = byte2int(ph_dyn[8*i:8*i + 4])
d_un = byte2int(ph_dyn[8*i + 4:8*i + 8])
self.ph_dyn_ent.append(ph_dynamic_entry(d_tag, d_un))
def dump_ph_dyn_entries(self):
header = ["d_tag", "d_un"]
tag_list = [get_ph_dynamic_ent_tag_type(ph.d_tag) for ph in self.ph_dyn_ent]
un_list = [ph.d_un for ph in self.ph_dyn_ent]
lines = ffs(2, header, True, tag_list, un_list)
for line in lines:
print(line)
def dump_funcs(self, dump_b):
ret_list = []
dummy = []
ret_list_int = []
for iter in self.string_tb_e:
if iter.st_type == ELF_ST_TYPE.STT_FUNC:
self.so.seek(int.from_bytes(iter.st_value, byteorder="little"))
obj = self.so.read(int.from_bytes(iter.st_size, byteorder="little"))
ret_list.append(obj)
for byte in obj:
dummy.append(int(byte))
ret_list_int.append(dummy)
dummy = []
if dump_b:
for obj in ret_list_int:
for byte in obj:
print(format(byte, "02x") + " ", end="")
print("\n")
return ret_list_int
def dump_symbol_string(self, stt_type, dump_b):
ret_list = []
for entry in self.string_tb_e:
if entry.st_type == stt_type:
ret_list.append("".join(self.get_st_entry_symbol_string(byte2int(entry.st_name), ".strtab")))
if dump_b:
for name in ret_list:
print(name)
return ret_list
def dump_section(self, section_name, dump):
hit = False
for section in self.shhdr:
name = self.read_section_name(byte2int(section.sh_name))
if name == section_name:
hit = True
self.so.seek(byte2int(section.sh_offset))
obj = self.so.read(byte2int(section.sh_size))
if section_name == ".interp": self.dlpath = repr(obj)
count = int()
if dump:
strrep = []
for byte in obj:
if count%16 == 0:
for ch in strrep:
if ord(ch) > 32 and ord(ch) < 127: print(ch, end = '')
else: print(" ", end="")
print()
strrep = []
print(format(count, "06x"), ': ', end='')
strrep.append(str(chr(byte)))
print(format(byte, '02x') + ' ', end='')
else:
pass
strrep += str(chr(byte))
print(format(byte, '02x') + ' ', end='')
count += 1
for i in range(0, 16-count%16): print(" ", end="")
for ch in strrep:
if ord(ch) > 32 and ord(ch) < 127: print(ch, end = '')
else: print(" ", end="")
print()
ret_dummy = []
for i in range(0, len(obj)):
ret_dummy.append(obj[i])
#print(ret_dummy)
return ret_dummy
if not hit: print(Colors.red + Colors.BOLD + "section is not present" + Colors.ENDC)
def dump_obj_size(self, stt_type, dump_b):
ret_list = []
for entry in self.string_tb_e:
if entry.st_type == stt_type:
ret_list.append(byte2int(entry.st_size))
if dump_b:
for name in ret_list:
print(name)
return ret_list
def dump_symbol_idx(self):
header = ["name", "size", "value", "info", "other", "shndx"]
name_list = [byte2int(st.st_name) for st in self.string_tb_e]
size_list = [byte2int(st.st_size) for st in self.string_tb_e]
value_list = [byte2int(st.st_value) for st in self.string_tb_e]
info_list = [byte2int(st.st_info) for st in self.string_tb_e]
other_list = [byte2int(st.st_other) for st in self.string_tb_e]
shndx_list = [byte2int(st.st_shndx) for st in self.string_tb_e]
lines = ffs(2, header, True, name_list, size_list, value_list, info_list, other_list, shndx_list)
print(Colors.green + Colors.BOLD + "symbol:" + Colors.ENDC)
for line in lines:
print(line)
print(Colors.green + Colors.BOLD + "dyn symbol:" + Colors.ENDC)
header = ["name", "size", "value", "info", "other", "shndx"]
name_list = [byte2int(st.st_name) for st in self.string_tb_e_dyn]
size_list = [byte2int(st.st_size) for st in self.string_tb_e_dyn]
value_list = [byte2int(st.st_value) for st in self.string_tb_e_dyn]
info_list = [byte2int(st.st_info) for st in self.string_tb_e_dyn]
other_list = [byte2int(st.st_other) for st in self.string_tb_e_dyn]
shndx_list = [byte2int(st.st_shndx) for st in self.string_tb_e_dyn]
lines = ffs(2, header, True, name_list, size_list, value_list, info_list, other_list, shndx_list)
for line in lines:
print(line)
def dump_header(self):
header = ["ei_mag", "ei_class", "ei_data", "ei_version", "ei_osabi", "ei_abiversion", "ei_pad",
"e_type", "e_machine", "e_version", "e_version", "e_entry", "e_phoff", "e_shoff", "e_flags",
"e_entsize", "e_phentsize", "e_phnum", "e_shentsize", "e_shnum", "e_shstrndx"]
mag_list = [self.elfhdr.ei_mag]
class_list = [byte2int(self.elfhdr.ei_class)]
data_list = [byte2int(self.elfhdr.ei_data)]
version_list = [byte2int(self.elfhdr.ei_version)]
osabi_list = [byte2int(self.elfhdr.ei_osabi)]
abiversion_list = [byte2int(self.elfhdr.ei_abiversion)]
pad_list = [byte2int(self.elfhdr.ei_pad)]
type_list = [byte2int(self.elfhdr.e_type)]
machine_list = [byte2int(self.elfhdr.e_machine)]
version_list = [byte2int(self.elfhdr.e_version)]
entry_list = [byte2int(self.elfhdr.e_entry)]
phoff_list = [byte2int(self.elfhdr.e_phoff)]
shoff_list = [byte2int(self.elfhdr.e_shoff)]
flags_list = [byte2int(self.elfhdr.e_flags)]
ehsize_list = [byte2int(self.elfhdr.e_ehsize)]
phentsize_list = [byte2int(self.elfhdr.e_phentsize)]
phnum_list = [byte2int(self.elfhdr.e_phnum)]
shentsize_list = [byte2int(self.elfhdr.e_shentsize)]
shnum_list = [byte2int(self.elfhdr.e_shnum)]
shstrndx_list = [byte2int(self.elfhdr.e_shstrndx)]
lines = ffs(2, header, True, mag_list, class_list, data_list, version_list, osabi_list, abiversion_list,
pad_list, type_list, machine_list, version_list, entry_list, phoff_list, shoff_list,
flags_list, ehsize_list, phentsize_list, phnum_list, shentsize_list, phnum_list, shentsize_list, shnum_list, shstrndx_list)
for line in lines:
print(line)
def dump_phdrs(self):
header = ["p_type", "p_flags", "p_offset", "p_vaddr", "p_paddr", "p_filesz", "p_memsz", "p_flags2", "p_align"]
type_list = [get_ph_type(byte2int(phdr.p_type)) for phdr in self.phdr]
flags_list = [get_elf_seg_flag(byte2int(phdr.p_type)) for phdr in self.phdr]
offset_list = [byte2int(phdr.p_offset) for phdr in self.phdr]
vaddr_list = [byte2int(phdr.p_vaddr) for phdr in self.phdr]
paddr_list = [byte2int(phdr.p_paddr) for phdr in self.phdr]
filesz_list = [byte2int(phdr.p_filesz) for phdr in self.phdr]
memsz_list = [byte2int(phdr.p_memsz) for phdr in self.phdr]
flags2_list = [phdr.p_flags2 for phdr in self.phdr]
align_list = [byte2hex(phdr.p_align) for phdr in self.phdr]
lines = ffs(2, header, True, type_list, flags_list, offset_list, vaddr_list, paddr_list, filesz_list, memsz_list, flags2_list, align_list)
for line in lines:
print(line)
def dump_shdrs(self):
header = ["sh_name", "sh_type", "sh_flags", "sh_addr", "sh_offset", "sh_size", "sh_link", "sh_info", "sh_addralign", "sh_entsize"]
name_list = [self.read_section_name(byte2int(shhdr.sh_name)) for shhdr in self.shhdr]
type_list = [get_section_type_string(byte2int(shhdr.sh_type)) for shhdr in self.shhdr]
flag_list = [byte2int(shhdr.sh_flags) for shhdr in self.shhdr]
addr_list = [byte2int(shhdr.sh_addr) for shhdr in self.shhdr]
offset_list = [byte2int(shhdr.sh_offset) for shhdr in self.shhdr]
size_list = [byte2int(shhdr.sh_size) for shhdr in self.shhdr]
link_list = [byte2int(shhdr.sh_link) for shhdr in self.shhdr]
info_list = [byte2int(shhdr.sh_info) for shhdr in self.shhdr]
allign_list = [byte2int(shhdr.sh_addralign) for shhdr in self.shhdr]
entsize_list = [byte2int(shhdr.sh_entsize) for shhdr in self.shhdr]
lines = ffs(2, header, True, name_list, type_list, flag_list, addr_list, offset_list, size_list, link_list, info_list, allign_list, entsize_list)
for line in lines:
print(line)
def dump_symbol_tb(self, name, type):
for i in range(0, byte2int(self.elfhdr.e_shnum)):
if byte2int(self.shhdr[i].sh_type) == type:
if name == self.read_section_name(byte2int(self.shhdr[i].sh_name)):
print(Colors.BOLD + Colors.yellow + "STRING TABLE:" + Colors.ENDC)
self.so.seek(byte2int(self.shhdr[i].sh_offset), 0)
symbol_tb = self.so.read(byte2int(self.shhdr[i].sh_size))
for byte in symbol_tb:
print(chr(byte), end='')
if chr(byte) == '\0': print()
def dump_st_entries(self):
header = ["name_index", "name", "value", "size", "info", "other", "shndx", "bind", "type"]
idx_list = [byte2int(entry.st_name) for entry in self.string_tb_e]
name_list = [ "".join(self.get_st_entry_symbol_string(byte2int(entry.st_name), ".strtab")) for entry in self.string_tb_e]
value_list = [byte2int(entry.st_value) for entry in self.string_tb_e]
size_list = [byte2int(entry.st_size) for entry in self.string_tb_e]
info_list = [byte2int(entry.st_info) for entry in self.string_tb_e]
other_list = [byte2int(entry.st_other) for entry in self.string_tb_e]
shndx_list = [byte2int(entry.st_shndx) for entry in self.string_tb_e]
bind_list = [get_elf_st_bind_string(entry.st_bind) for entry in self.string_tb_e]
type_list = [get_elf_st_type_string(entry.st_type) for entry in self.string_tb_e]
lines = ffs(2, header, True, idx_list, name_list, value_list, size_list, info_list, other_list, shndx_list, bind_list, type_list)
for line in lines:
print(line)
def dump_st_entries_dyn(self):
header = ["name_index", "name", "value", "size", "info", "other", "shndx", "bind", "type"]
idx_list = [byte2int(entry.st_name) for entry in self.string_tb_e_dyn]
name_list = [ "".join(self.get_st_entry_symbol_string(byte2int(entry.st_name), ".dynstr")) for entry in self.string_tb_e_dyn]
value_list = [byte2int(entry.st_value) for entry in self.string_tb_e_dyn]
size_list = [byte2int(entry.st_size) for entry in self.string_tb_e_dyn]
info_list = [byte2int(entry.st_info) for entry in self.string_tb_e_dyn]
other_list = [byte2int(entry.st_other) for entry in self.string_tb_e_dyn]
shndx_list = [byte2int(entry.st_shndx) for entry in self.string_tb_e_dyn]
bind_list = [get_elf_st_bind_string(entry.st_bind) for entry in self.string_tb_e_dyn]
type_list = [get_elf_st_type_string(entry.st_type) for entry in self.string_tb_e_dyn]
lines = ffs(2, header, True, idx_list, name_list, value_list, size_list, info_list, other_list, shndx_list, bind_list, type_list)
for line in lines:
print(line)
def dump_dyn_sec_ents(self, who):
header = ["type_string", "tag", "value", "value(hex)"]
tag_string_list = [entry["type_string"] for entry in who]
tag_list = [entry["tag"] for entry in who]
value_list = [entry["value"] for entry in who]
value_list_hex = [hex(entry["value"]) for entry in who]
lines = ffs(2, header, True, tag_string_list, tag_list, value_list, value_list_hex)
for line in lines:
print(line)
def dump_rela(self, to_dump):
header = ["r_offset", "r_info", "r_addend"]
r_offset_list = [entry["r_offset"] for entry in to_dump]
r_info_list = [entry["r_info"] for entry in to_dump]
addend_list = [entry["r_addend"] for entry in to_dump]
lines = ffs(2, header, True, r_offset_list, r_info_list, addend_list)
for line in lines: print(line)
def dump_rel(self, to_dump):
header = ["r_offset", "r_info"]
r_offset_list = [entry["r_offset"] for entry in to_dump]
r_info_list = [entry["r_info"] for entry in to_dump]
lines = ffs(2, header, True, r_offset_list, r_info_list)
for line in lines: print(line)
def get_st_entry_symbol_string(self, index, section_name):
symbol = []
for i in range(0, byte2int(self.elfhdr.e_shnum)):
name = self.read_section_name(byte2int(self.shhdr[i].sh_name))
if byte2int(self.shhdr[i].sh_type) == sh_type_e.SHT_STRTAB and name == section_name:
self.so.seek(byte2int(self.shhdr[i].sh_offset) + index, 0)
byte = self.so.read(1)
while chr(byte[0]) != "\0":
if chr(byte[0]) != "\0": symbol.append(chr(byte[0]))
byte = self.so.read(1)
return symbol
def get_symbol_string_table(self, offset):
symbol = []
for i in range(0, int.from_bytes(self.elfhdr.e_shnum, byteorder="little", signed=False)):
if int.from_bytes(self.shhdr[i].sh_type, byteorder="little", signed=False) == sh_type_e.SHT_STRTAB:
self.so.seek(int.from_bytes(self.shhdr[i].sh_offset, byteorder="little", signed=False) + offset - 0, 0)
byte = self.so.read(1)
while chr(byte[0]) != "\0":
if chr(byte[0]) != "\0": symbol.append(chr(byte[0]))
byte = self.so.read(1)
return symbol
def dump_inst_sections(self):
indices= []
for section in self.shhdr:
if int.from_bytes(section.sh_flags, byteorder="little", signed=False) & sh_flags_e.SHF_EXECINSTR == sh_flags_e.SHF_EXECINSTR:
indices.append(int.from_bytes(section.sh_name, byteorder="little"))
return indices
def pop_data_section(self):
for section in self.shhdr:
name = self.read_section_name(byte2int(section.sh_name))
if name == ".data":
self.so.seek(byte2int(section.sh_offset))
self.data_section = self.so.read(byte2int(section.sh_size))
def pop_text_section(self):
for section in self.shhdr:
name = self.read_section_name(byte2int(section.sh_name))
if name == ".text":
self.so.seek(byte2int(section.sh_offset))
self.text_section = self.so.read(byte2int(section.sh_size))
def pop_dynamic_entries(self, section_name, struct_to_pop):
for section in self.shhdr:
name = self.read_section_name(byte2int(section.sh_name))
if name == section_name:
self.so.seek(byte2int(section.sh_offset))
self.dyn_section = self.so.read(byte2int(section.sh_size))
length = int(len(self.dyn_section))
tag_type = int()
type_string = str()
value = int()
dummy = {}
jmp_val = int()
if self.size == 64: jmp_val = 8
elif self.size == 32: jmp_val = 4
else: jmp_val = 8; print("self.size is not set for class elf.going with 8 as a default.")
for offset in range(0, length, jmp_val*2):
tag_type = byte2int(self.dyn_section[offset:offset+jmp_val])
dummy["tag"] = tag_type
value = byte2int(self.dyn_section[offset+jmp_val:offset+(jmp_val*2)])
dummy["value"] = value
type_string = get_ph_dynamic_ent_tag_type(tag_type)
dummy["type_string"] = type_string
type_string = str()
struct_to_pop.append(dummy)
dummy = {}
def pop_rela(self, section_name, section_whole, to_pop):
size = int()
entsize = int()
dummy = {}
step = int()
if self.size == 64: step = 8
if self.size == 32: step = 4
for section in self.shhdr:
name = self.read_section_name(byte2int(section.sh_name))
if name == section_name:
self.so.seek(byte2int(section.sh_offset))
section_whole = self.so.read(byte2int(section.sh_size))
size = byte2int(section.sh_size)
entsize = byte2int(section.sh_entsize)
for i in range(0, int(size/entsize)):
dummy["r_offset"] = byte2int(section_whole[i*entsize:i*entsize+step])
dummy["r_info"] = byte2int(section_whole[i*entsize+step:i*entsize+(step*2)])
dummy["r_addend"] = byte2int(section_whole[i*entsize+(step*2):i*entsize+(step*3)], sign=True)
to_pop.append(dummy)
dummy = {}
def pop_rel(self, section_name, section_whole, to_pop):
size = int()
entsize = int()
dummy = {}
step = int()
if self.size == 64: step = 8
if self.size == 32: step = 4
for section in self.shhdr:
name = self.read_section_name(byte2int(section.sh_name))
if name == section_name:
self.so.seek(byte2int(section.sh_offset))
section_whole = self.so.read(byte2int(section.sh_size))
size = byte2int(section.sh_size)
entsize = byte2int(section.sh_entsize)
for i in range(0, int(size/entsize)):
dummy["r_offset"] = byte2int(section_whole[i*entsize:i*entsize+step])
dummy["r_info"] = byte2int(section_whole[i*entsize+step:i*entsize+(step*2)])
to_pop.append(dummy)
dummy = {}
class obj_loader():
def __init__(self, bytes):
self.memory = bytes()
def load(self, obj):
for byte in obj:
self.memory.append(byte)
def ch_so_to_exe(path):
so = open(path, "r+b")
so.seek(16)
so.write(bytes([2]))
print(Colors.purple + "changed so to exe" + Colors.ENDC)
so.close
def ch_exe_to_so(path):
so = open(path, "r+b")
so.seek(16)
so.write(bytes([3]))
print(Colors.purple + "changed exe to so" + Colors.ENDC)
so.close
def elf_init():
so = openSO_r(sys.argv[1])
elf = ELF(so)
elf.init(64)
def elf_get_func_names():
so = openSO_r(sys.argv[1])
elf = ELF(so)
elf.init(64)
return elf.dump_symbol_string(ELF_ST_TYPE.STT_FUNC, False)
def elf_get_text_section():
so = openSO_r(sys.argv[1])
elf = ELF(so)
elf.init(64)
return elf.dump_section(".text", False)
def elf_get_section(name):
so = openSO_r(sys.argv[1])
elf = ELF(so)
elf.init(64)
return elf.dump_section(name, False)
def elf_get_rodata_section():
so = openSO_r(sys.argv[1])
elf = ELF(so)
elf.init(64)
return elf.dump_section(".rodata", False)
# obj here means variables or what the C standard means by objects
def elf_get_obj_names():
so = openSO_r(sys.argv[1])
elf = ELF(so)
elf.init(64)
return elf.dump_symbol_string(ELF_ST_TYPE.STT_OBJECT, False)
# obj here means variables or what the C standard means by objects
def elf_get_obj_sizes():
so = openSO_r(sys.argv[1])
elf = ELF(so)
elf.init(64)
return elf.dump_obj_size(ELF_ST_TYPE.STT_OBJECT, False)
def elf_get_func_code():
so = openSO_r(sys.argv[1])
elf = ELF(so)
elf.init(64)
return elf.dump_funcs(False)
def elf_get_func_code_byname():
so = openSO_r(sys.argv[1])
arg = openSO_r(sys.argv[2])
elf = ELF(so)
elf.init(64)
counter = 0
hit = False
for name in elf.dump_symbol_string(ELF_ST_TYPE.STT_FUNC, False):
if name == arg:
code = elf.dump_funcs(False)[counter]
hit = True
counter += 1
return code
class Call_Rewriter(object):
#def __init__(self, obj_code, arch, mode):
def __init__(self, obj_code):
self.obj_code = bytes(obj_code)
self.md = Cs(CS_ARCH_X86, CS_MODE_64)
#self.md = Cs(arch, mode)
def dumpall(self):
for i in self.md.disasm(self.obj_code, 0x1):
print("0x%x:\t%s\t%s" %(i.address, i.mnemonic, i.op_str))
def run(self):
for i in self.md.disasm(self.obj_code, 0x1):
if i.mnemonic == "call":
print("0x%x:\t%s\t%s" %(i.address, i.mnemonic, i.op_str))
print(i.bytes)
class Global_Rewriter(object):
def __init__(self):
pass
class Rewriter(object):
def __init__(self, path, new_name):
so = openSO_r(path)
self.elf = ELF(so)
self.elf.init(64)
#shutil.copyfile(path, "/tmp/exe")
self.magic_section_number = int()
self.new_name = new_name
self.shdr_new_size = []
self.shdr_new_offset = []
def fix_section_offsets(self, section_name, new_size:int, new_section:bytes):
file_w = open(self.new_name, "wb")
magic_number = int()
for i in range(0, byte2int(self.elf.elfhdr.e_shnum)):
name = self.elf.read_section_name(byte2int(self.elf.shhdr[i].sh_name))
if section_name == name:
self.magic_section_number = i
print(self.magic_section_number)
### copy the sections before magic_number
### write in the new section
### fix section headers
end = int()
#for i in range(self.magic_section_number, byte2int(self.elf.elfhdr.e_shnum) + 1):
for i in range(0, byte2int(self.elf.elfhdr.e_shnum)):
if i > self.magic_section_number:
extra_chunk = end % byte2int(self.elf.shhdr[i].sh_addralign)
missing_chunk = byte2int(self.elf.shhdr[i].sh_addralign) - extra_chunk
assert missing_chunk > 0, "missing chunk is negative"
self.shdr_new_size.append(byte2int(self.elf.shhdr[i].sh_size))
self.shdr_new_offset.append(end + missing_chunk%byte2int(self.elf.shhdr[i].sh_addralign))
end = self.shdr_new_offset[-1] + self.shdr_new_size[-1]
elif i < self.magic_section_number:
self.shdr_new_size.append(byte2int(self.elf.shhdr[i].sh_size))
self.shdr_new_offset.append(byte2int(self.elf.shhdr[i].sh_offset))
elif i == self.magic_section_number:
self.shdr_new_size.append(new_size)
self.shdr_new_offset.append(byte2int(self.elf.shhdr[i].sh_offset))
end = byte2int(self.elf.shhdr[i].sh_offset) + new_size
for size in self.shdr_new_size: print(repr(i) + " new size is " + repr(size))
for offset in self.shdr_new_offset: print(repr(i) + " new offset is " + repr(offset))
def premain(argparser):
so = openSO_r(argparser.args.obj)
elf = ELF(so)
elf.init(64)
if argparser.args.header: elf.dump_header()
elif argparser.args.symboltable:
elf.dump_symbol_tb(".strtab", sh_type_e.SHT_STRTAB)
elf.dump_symbol_tb(".dynstr", sh_type_e.SHT_STRTAB)
elif argparser.args.phdrs: elf.dump_phdrs()
elif argparser.args.shdrs: elf.dump_shdrs()
elif argparser.args.symbolindex: elf.dump_symbol_idx()
elif argparser.args.stentries: elf.dump_st_entries()
elif argparser.args.objcode: elf.dump_funcs(True)
elif argparser.args.funcs: elf.dump_symbol_string(ELF_ST_TYPE.STT_FUNC, True)
elif argparser.args.objs: elf.dump_symbol_string(ELF_ST_TYPE.STT_OBJECT, True)
elif argparser.args.dynsym: elf.dump_st_entries_dyn()
elif argparser.args.dlpath: elf.dump_section(".interp", True)
elif argparser.args.section: elf.dump_section(argparser.args.section, True)
elif argparser.args.test2:
rewriter = Rewriter(argparser.args.obj, "new_exe")
new_text = bytes()
rewriter.fix_section_offsets(".text", 1000, new_text)
elif argparser.args.dumpfunc:
counter = 0
for name in elf.dump_symbol_string(ELF_ST_TYPE.STT_FUNC, False):
if name == argparser.args.dumpfunc:
print(Colors.red + Colors.BOLD + name + Colors.ENDC)
code = elf.dump_funcs(False)[counter]
print(code)
counter += 1
elif argparser.args.dumpfuncasm:
counter = 0
hit = False
for name in elf.dump_symbol_string(ELF_ST_TYPE.STT_FUNC, False):
if name == argparser.args.dumpfuncasm:
code = elf.dump_funcs(False)[counter]
hit = True
counter += 1
if hit:
md = Cs(CS_ARCH_X86, CS_MODE_64)
for i in md.disasm(bytes(code), 0x0):
print(hex(i.address).ljust(7), i.mnemonic.ljust(7), i.op_str)
elif argparser.args.phdynent: elf.dump_ph_dyn_entries()
elif argparser.args.disass:
for section in elf.shhdr:
name = elf.read_section_name(byte2int(section.sh_name))
if name == argparser.args.disass:
if byte2int(section.sh_flags) & 0x4 != 0x04:
print("section is not executable...but, since you asked, here you go...")
elf.so.seek(byte2int(section.sh_offset))
code = elf.so.read(byte2int(section.sh_size))
md = Cs(CS_ARCH_X86, CS_MODE_64)
for i in md.disasm(bytes(code), 0x0):
print(hex(i.address).ljust(7), i.mnemonic.ljust(7), i.op_str)
elif argparser.args.textasm:
md = Cs(CS_ARCH_X86, CS_MODE_64)
for i in md.disasm(bytes(elf.text_section), 0x0):
print(hex(i.address).ljust(7), i.mnemonic.ljust(7), i.op_str)
elif argparser.args.dynsecents: elf.dump_dyn_sec_ents(elf.dyn_section_ents)
elif argparser.args.reladyn: elf.dump_rela(elf.rela_dyn_ents)
elif argparser.args.relaplt: elf.dump_rela(elf.rela_plt_ents)
else: print("why even bother if you were not gonna type anythng decent in?")
def main():
argparser = CLIArgParser()
if argparser.args.dbg:
try:
premain(argparser)
except Exception as e:
print(e.__doc__)
if e.message: print(e.message)
signal.signal(signal.SIGINT, SigHandler_SIGINT)
variables = globals().copy()
variables.update(locals())
shell = code.InteractiveConsole(variables)
shell.interact(banner="DELF REPL")
else:
premain(argparser)
if __name__ == "__main__":
main()
