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lisa.py
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import io
import os
import re
import abc
import cmd
import sys
import json
import lldb
import stat
import uuid
import fcntl
import shlex
import string
import struct
import hashlib
import fnmatch
import pathlib
import sqlite3
import termios
import capstone
import optparse
import platform
import functools
import subprocess
BLK = "\033[30m"
BLU = "\033[34m"
CYN = "\033[36m"
GRN = "\033[32m"
MAG = "\033[35m"
RED = "\033[31m"
RST = "\033[0m"
YEL = "\033[33m"
WHT = "\033[37m"
BASE00 = '#657b83'
VERTICAL_LINE = "\u2502"
HORIZONTAL_LINE = "\u2500"
__prompt__ = f"'(lisa:>) '"
# from CW
MINIMUM_RECURSION_LENGTH = 300
NO_CHANGE = 0
CHANGE_TO_EXPLOITABLE = 1
CHANGE_TO_NOT_EXPLOITABLE = 2
# cpu types
CPU_TYPE_I386 = 7
CPU_ARCH_ABI64 = 0x1000000
CPU_TYPE_X86_64 = CPU_TYPE_I386 | CPU_ARCH_ABI64
CPU_TYPE_ARM = 12
CPU_TYPE_ARM64 = CPU_TYPE_ARM | CPU_ARCH_ABI64
dlog = lambda msg: print(f"{GRN}{msg}{RST}")
warnlog = lambda msg: print(f"{YEL}{msg}{RST}")
errlog = lambda msg: print(f"{RED}{msg}{RST}")
# tty_rows, tty_columns = struct.unpack("hh", fcntl.ioctl(1, termios.TIOCGWINSZ, "1234"))
tty_rows, tty_columns = 120, 120
def context_title(m):
line_color= YEL
msg_color = GRN
if not m:
print(f"{line_color}{HORIZONTAL_LINE * tty_columns} {line_color}{RST}")
return
trail_len = len(m) + 8
title = ""
title += line_color+" {:{padd}<{width}} ".format("", width=max(tty_columns - trail_len, 0), padd=HORIZONTAL_LINE)+RST
title += f"{msg_color}{m}{RST}"
title += line_color+" {:{padd}<4}".format("", padd=HORIZONTAL_LINE)+RST
print(title)
def get_host_pagesize():
host_machine = get_host_machine()
target_arch = get_target_triple().split('-')[0]
page_size = 0
if host_machine == target_arch:
page_size = run_shell_command('getconf PAGE_SIZE').stdout.rstrip()
elif host_machine=="arm64" and target_arch=="x86_64":
page_size = run_shell_command('arch -x86_64 getconf PAGE_SIZE').stdout.rstrip()
else:
errlog("get_host_pagesize failed")
return 16384
return int(page_size)
def get_host_machine():
return platform.machine()
def get_host_arch():
if get_host_machine() == "arm64":
return CPU_TYPE_ARM64
elif get_host_machine() == "x86_64":
return CPU_TYPE_X86_64
def cpu_to_string(cpu):
if cpu == CPU_TYPE_X86_64:
return "x86_64"
elif cpu == CPU_TYPE_ARM64:
return "arm64"
def get_target_triple():
return lldb.debugger.GetSelectedTarget().triple
def get_target_arch():
arch = lldb.debugger.GetSelectedTarget().triple.split('-')[0]
if arch == "arm64" or arch=="arm64e":
return AARCH64()
elif arch == "x86_64":
return X8664()
else:
errlog(f"Architecture {arch} not supported")
def load_manual():
global inst_map
inst_map = {}
archs = ["arm", "x86_64"]
for arch in archs:
path = pathlib.Path(__file__).parent.absolute()
dbpath = os.path.join(path, "archs", arch + ".sql")
con = sqlite3.connect(":memory:")
con.text_factory = str
con.executescript(open(dbpath).read())
cur = con.cursor()
cur.execute("SELECT mnem, description FROM instructions")
con.commit()
rows = cur.fetchall()
for row in rows:
inst = row[0]
lines = row[1].replace("\r\n", "\n").split("\n")
inst_map[inst] = lines
con.close()
for (inst, data) in inst_map.items():
data = data[0]
if data[0:3] == "-R:":
ref = data[3:]
if ref in inst_map:
inst_map[inst] = inst_map[ref]
dlog(f"Manual loaded for architecture: {arch}")
return True
def run_shell_command(command, shell=True):
return subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=shell)
def make_run_command(command):
def runCommand(debugger, input, exe_ctx, result, _):
command.result = result
command.context = exe_ctx
splitInput = command.lex(input)
# OptionParser will throw in the case where you want just one
# big long argument and no options and you enter something
# that starts with '-' in the argument. e.g.:
# somecommand -[SomeClass someSelector:]
# This solves that problem by prepending a '--' so that
# OptionParser does the right thing.
options = command.options()
if len(options) == 0:
if "--" not in splitInput:
splitInput.insert(0, "--")
parser = option_parser_for_command(command)
(options, args) = parser.parse_args(splitInput)
# When there are more args than the command has declared, assume
# the initial args form an expression and combine them into a single arg.
if len(args) > len(command.args()):
overhead = len(args) - len(command.args())
head = args[: overhead + 1] # Take N+1 and reduce to 1.
args = [" ".join(head)] + args[-overhead:]
if validate_args_for_command(args, command):
command.run(args, options)
runCommand.__doc__ = help_for_command(command)
return runCommand
def load_command(module, command, filename):
func = make_run_command(command)
name = command.name()
key = filename + "_" + name
helpText = (
command.description().strip().splitlines()[0]
) # first line of description
module._loadedFunctions[key] = func
functionName = "__" + key
lldb.debugger.HandleCommand(
"script "
+ functionName
+ " = sys.modules['"
+ module.__name__
+ "']._loadedFunctions['"
+ key
+ "']"
)
lldb.debugger.HandleCommand(
'command script add --help "{help}" --function {function} {name}'.format(
help=helpText.replace('"', '\\"'), # escape quotes
function=functionName,
name=name,
)
)
def validate_args_for_command(args, command):
if len(args) < len(command.args()):
defaultArgs = [arg.default for arg in command.args()]
defaultArgsToAppend = defaultArgs[len(args) :]
index = len(args)
for defaultArg in defaultArgsToAppend:
if defaultArg:
arg = command.args()[index]
print("Whoops! You are missing the <" + arg.argName + "> argument.")
print("\nUsage: " + usage_for_command(command))
return
index += 1
args.extend(defaultArgsToAppend)
return True
def option_parser_for_command(command):
parser = optparse.OptionParser()
for argument in command.options():
if argument.boolean:
parser.add_option(
argument.shortName,
argument.longName,
dest=argument.argName,
help=argument.help,
action=("store_false" if argument.default else "store_true"),
)
else:
parser.add_option(
argument.shortName,
argument.longName,
dest=argument.argName,
help=argument.help,
default=argument.default,
)
return parser
def help_for_command(command):
help = command.description()
argSyntax = ""
optionSyntax = ""
if command.args():
help += "\n\nArguments:"
for arg in command.args():
help += "\n <" + arg.argName + ">; "
if arg.argType:
help += "Type: " + arg.argType + "; "
help += arg.help
argSyntax += " <" + arg.argName + ">"
if command.options():
help += "\n\nOptions:"
for option in command.options():
if option.longName and option.shortName:
optionFlag = option.longName + "/" + option.shortName
elif option.longName:
optionFlag = option.longName
else:
optionFlag = option.shortName
help += "\n " + optionFlag + " "
if not option.boolean:
help += "<" + option.argName + ">; Type: " + option.argType
help += "; " + option.help
optionSyntax += " [{name}{arg}]".format(
name=(option.longName or option.shortName),
arg=("" if option.boolean else ("=" + option.argName)),
)
help += "\n\nSyntax: " + command.name() + optionSyntax + argSyntax
help += "\n\nThis command is implemented as %s" % (
command.__class__.__name__,
)
return help
def usage_for_command(command):
usage = command.name()
for arg in command.args():
if arg.default:
usage += " [" + arg.argName + "]"
else:
usage += " " + arg.argName
return usage
class CommandArgument: # noqa B903
def __init__(
self, short="", long="", arg="", type="", help="", default="", boolean=False):
self.shortName = short
self.longName = long
self.argName = arg
self.argType = type
self.help = help
self.default = default
self.boolean = boolean
class LLDBCommand:
def name(self):
return None
def options(self):
return []
def args(self):
return []
def description(self):
return ""
def lex(self, commandLine):
return shlex.split(commandLine)
def run(self, arguments, option):
pass
#################################################################################
############################ Utilities #########################################
#################################################################################
colormap = [
0x000000, 0x560000, 0x640000, 0x750000, 0x870000, 0x9b0000, 0xb00000, 0xc60000, 0xdd0000, 0xf50000, 0xff0f0f, 0xff2828, 0xff4343, 0xff5e5e, 0xff7979, 0xfe9595,
0x4c1600, 0x561900, 0x641e00, 0x752300, 0x872800, 0x9b2e00, 0xb03400, 0xc63b00, 0xdd4200, 0xf54900, 0xff570f, 0xff6928, 0xff7b43, 0xff8e5e, 0xffa179, 0xfeb595,
0x4c3900, 0x564000, 0x644b00, 0x755700, 0x876500, 0x9b7400, 0xb08400, 0xc69400, 0xdda600, 0xf5b800, 0xffc30f, 0xffc928, 0xffd043, 0xffd65e, 0xffdd79, 0xfee495,
0x4c4c00, 0x565600, 0x646400, 0x757500, 0x878700, 0x9b9b00, 0xb0b000, 0xc6c600, 0xdddd00, 0xf5f500, 0xffff0f, 0xffff28, 0xffff43, 0xffff5e, 0xffff79, 0xfffe95,
0x324c00, 0x395600, 0x426400, 0x4e7500, 0x5a8700, 0x679b00, 0x75b000, 0x84c600, 0x93dd00, 0xa3f500, 0xafff0f, 0xb7ff28, 0xc0ff43, 0xc9ff5e, 0xd2ff79, 0xdbfe95,
0x1f4c00, 0x235600, 0x296400, 0x307500, 0x388700, 0x409b00, 0x49b000, 0x52c600, 0x5cdd00, 0x66f500, 0x73ff0f, 0x82ff28, 0x91ff43, 0xa1ff5e, 0xb1ff79, 0xc1fe95,
0x004c00, 0x005600, 0x006400, 0x007500, 0x008700, 0x009b00, 0x00b000, 0x00c600, 0x00dd00, 0x00f500, 0x0fff0f, 0x28ff28, 0x43ff43, 0x5eff5e, 0x79ff79, 0x95fe95,
0x004c19, 0x00561c, 0x006421, 0x007527, 0x00872d, 0x009b33, 0x00b03a, 0x00c642, 0x00dd49, 0x00f551, 0x0fff5f, 0x28ff70, 0x43ff81, 0x5eff93, 0x79ffa6, 0x95feb8,
0x004c4c, 0x005656, 0x006464, 0x007575, 0x008787, 0x009b9b, 0x00b0b0, 0x00c6c6, 0x00dddd, 0x00f5f5, 0x0ffffe, 0x28fffe, 0x43fffe, 0x5efffe, 0x79ffff, 0x95fffe,
0x00394c, 0x004056, 0x004b64, 0x005775, 0x006587, 0x00749b, 0x0084b0, 0x0094c6, 0x00a6dd, 0x00b8f5, 0x0fc3ff, 0x28c9ff, 0x43d0ff, 0x5ed6ff, 0x79ddff, 0x95e4fe,
0x00264c, 0x002b56, 0x003264, 0x003a75, 0x004387, 0x004d9b, 0x0058b0, 0x0063c6, 0x006edd, 0x007af5, 0x0f87ff, 0x2893ff, 0x43a1ff, 0x5eaeff, 0x79bcff, 0x95cafe,
0x00134c, 0x001556, 0x001964, 0x001d75, 0x002187, 0x00269b, 0x002cb0, 0x0031c6, 0x0037dd, 0x003df5, 0x0f4bff, 0x285eff, 0x4372ff, 0x5e86ff, 0x799aff, 0x95b0fe,
0x19004c, 0x1c0056, 0x210064, 0x270075, 0x2d0087, 0x33009b, 0x3a00b0, 0x4200c6, 0x4900dd, 0x5100f5, 0x5f0fff, 0x7028ff, 0x8143ff, 0x935eff, 0xa679ff, 0xb895fe,
0x33004c, 0x390056, 0x420064, 0x4e0075, 0x5a0087, 0x67009b, 0x7500b0, 0x8400c6, 0x9300dd, 0xa300f5, 0xaf0fff, 0xb728ff, 0xc043ff, 0xc95eff, 0xd279ff, 0xdb95fe,
0x4c004c, 0x560056, 0x640064, 0x750075, 0x870087, 0x9b009b, 0xb000b0, 0xc600c6, 0xdd00dd, 0xf500f5, 0xfe0fff, 0xfe28ff, 0xfe43ff, 0xfe5eff, 0xfe79ff, 0xfe95fe,
0x4c0032, 0x560039, 0x640042, 0x75004e, 0x87005a, 0x9b0067, 0xb00075, 0xc60084, 0xdd0093, 0xf500a3, 0xff0faf, 0xff28b7, 0xff43c0, 0xff5ec9, 0xff79d2, 0xffffff,
]
def expand(v):
"""Split a 24 bit integer into 3 bytes
>>> expand(0xff2001)
(255, 32, 1)
"""
return ( ((v)>>16 & 0xFF), ((v)>>8 & 0xFF), ((v)>>0 & 0xFF) )
def format_offset(offset):
"""Return a right-aligned hexadecimal representation of offset.
>>> format_offset(128)
' 0080'
>>> format_offset(3735928559)
'deadbeef'
"""
return '0x%5x%03x' % (offset >> 12, offset & 0xFFF)
def visual_hexdump(buffer, start=0, end=None, columns=64):
"""Print a colorful representation of binary data using terminal ESC codes
"""
count = (end or -1) - start
read = 0
while read != count:
if end == None:
to_read = io.DEFAULT_BUFFER_SIZE
else:
to_read = min(count - read, io.DEFAULT_BUFFER_SIZE)
buf = buffer[read:read+to_read]
for i in range(0, len(buf), columns*2):
offset = start + read + i
print(format_offset(offset), end=' ')
for j in range(0, columns):
if i + j >= len(buf):
break
elif i + j + columns >= len(buf):
print('\x1B[0m\x1B[38;2;%d;%d;%dm▀' % expand(colormap[buf[i + j]]), end='')
else:
print('\x1B[38;2;%d;%d;%dm\x1B[48;2;%d;%d;%dm▀' % (expand(colormap[buf[i + j]]) + expand(colormap[buf[i + j + columns]])), end='')
print('\x1B[m')
read += len(buf)
HEADER = '┌────────────────┬─────────────────────────┬─────────────────────────┬────────┬────────┐'
FOOTER = RST+'└────────────────┴─────────────────────────┴─────────────────────────┴────────┴────────┘'
LINE_FORMATTER = '│' + '' + '{:016x}' + '│ {}' + '│{}' + '│' + RST
def hexmod(b: int) -> str:
'''10 -> "0xa" -> "0a"'''
return hex(b)[2:].rjust(2, '0')
def colored(b: int) -> (str, str):
ch = chr(b)
hx = hexmod(b)
if '\x00' == ch:
return RST + hx , RST + "."
elif ch in string.ascii_letters + string.digits + string.punctuation:
return CYN + hx, CYN + ch
elif ch in string.whitespace:
return GRN + hx, ' ' if ' ' == ch else GRN + '_'
return YEL + hx, YEL + '.'
def hexdump(buf, address):
cache = {hexmod(b): colored(b) for b in range(256)} #0x00 - 0xff
cache[' '] = (' ', ' ')
print(HEADER)
cur = 0
row = address
line = buf[cur:cur+16]
while line:
line_hex = line.hex().ljust(32)
hexbytes = ''
printable = ''
for i in range(0, len(line_hex), 2):
hbyte, abyte = cache[line_hex[i:i+2]]
hexbytes += hbyte + ' ' if i != 14 else hbyte + ' ┊ '
printable += abyte if i != 14 else abyte + '┊'
print(LINE_FORMATTER.format(row, hexbytes, printable))
row += 0x10
cur += 0x10
line = buf[cur:cur+16]
print(FOOTER)
def swap_unpack_char():
"""Returns the unpack prefix that will for non-native endian-ness."""
if struct.pack('H', 1).startswith("\x00"):
return '<'
return '>'
def dump_hex_bytes(addr, s, bytes_per_line=8):
i = 0
line = ''
for ch in s:
if (i % bytes_per_line) == 0:
if line:
print(line)
line = '%#8.8x: ' % (addr + i)
line += "%02x " % ch
i += 1
print(line)
def dump_hex_byte_string_diff(addr, a, b, bytes_per_line=16):
i = 0
line = ''
a_len = len(a)
b_len = len(b)
if a_len < b_len:
max_len = b_len
else:
max_len = a_len
tty_colors = TerminalColors(True)
for i in range(max_len):
ch = None
if i < a_len:
ch_a = a[i]
ch = ch_a
else:
ch_a = None
if i < b_len:
ch_b = b[i]
if not ch:
ch = ch_b
else:
ch_b = None
mismatch = ch_a != ch_b
if (i % bytes_per_line) == 0:
if line:
print(line)
line = '%#8.8x: ' % (addr + i)
if mismatch:
line += RED
line += "%02X " % ord(ch)
if mismatch:
line += RST
i += 1
print(line)
def evaluateInputExpression(expression, printErrors=True):
# HACK
frame = (
lldb.debugger.GetSelectedTarget()
.GetProcess()
.GetSelectedThread()
.GetSelectedFrame()
)
options = lldb.SBExpressionOptions()
options.SetTrapExceptions(False)
value = frame.EvaluateExpression(expression, options)
error = value.GetError()
if printErrors and error.Fail():
errlog(error)
return value
class FileExtract:
'''Decode binary data from a file'''
def __init__(self, f, b='='):
'''Initialize with an open binary file and optional byte order'''
self.file = f
self.byte_order = b
self.offsets = list()
def set_byte_order(self, b):
'''Set the byte order, valid values are "big", "little", "swap", "native", "<", ">", "@", "="'''
if b == 'big':
self.byte_order = '>'
elif b == 'little':
self.byte_order = '<'
elif b == 'swap':
# swap what ever the current byte order is
self.byte_order = swap_unpack_char()
elif b == 'native':
self.byte_order = '='
elif b == '<' or b == '>' or b == '@' or b == '=':
self.byte_order = b
else:
print("error: invalid byte order specified: '%s'" % b)
def is_in_memory(self):
return False
def seek(self, offset, whence=0):
if self.file:
return self.file.seek(offset, whence)
raise ValueError
def tell(self):
if self.file:
return self.file.tell()
raise ValueError
def read_size(self, byte_size):
s = self.file.read(byte_size)
if len(s) != byte_size:
return None
return s
def push_offset_and_seek(self, offset):
'''Push the current file offset and seek to "offset"'''
self.offsets.append(self.file.tell())
self.file.seek(offset, 0)
def pop_offset_and_seek(self):
'''Pop a previously pushed file offset, or do nothing if there were no previously pushed offsets'''
if len(self.offsets) > 0:
self.file.seek(self.offsets.pop())
def get_sint8(self, fail_value=0):
'''Extract a single int8_t from the binary file at the current file position, returns a single integer'''
s = self.read_size(1)
if s:
v, = struct.unpack(self.byte_order + 'b', s)
return v
else:
return fail_value
def get_uint8(self, fail_value=0):
'''Extract a single uint8_t from the binary file at the current file position, returns a single integer'''
s = self.read_size(1)
if s:
v, = struct.unpack(self.byte_order + 'B', s)
return v
else:
return fail_value
def get_sint16(self, fail_value=0):
'''Extract a single int16_t from the binary file at the current file position, returns a single integer'''
s = self.read_size(2)
if s:
v, = struct.unpack(self.byte_order + 'h', s)
return v
else:
return fail_value
def get_uint16(self, fail_value=0):
'''Extract a single uint16_t from the binary file at the current file position, returns a single integer'''
s = self.read_size(2)
if s:
v, = struct.unpack(self.byte_order + 'H', s)
return v
else:
return fail_value
def get_sint32(self, fail_value=0):
'''Extract a single int32_t from the binary file at the current file position, returns a single integer'''
s = self.read_size(4)
if s:
v, = struct.unpack(self.byte_order + 'i', s)
return v
else:
return fail_value
def get_uint32(self, fail_value=0):
'''Extract a single uint32_t from the binary file at the current file position, returns a single integer'''
s = self.read_size(4)
if s:
v, = struct.unpack(self.byte_order + 'I', s)
return v
else:
return fail_value
def get_sint64(self, fail_value=0):
'''Extract a single int64_t from the binary file at the current file position, returns a single integer'''
s = self.read_size(8)
if s:
v, = struct.unpack(self.byte_order + 'q', s)
return v
else:
return fail_value
def get_uint64(self, fail_value=0):
'''Extract a single uint64_t from the binary file at the current file position, returns a single integer'''
s = self.read_size(8)
if s:
v, = struct.unpack(self.byte_order + 'Q', s)
return v
else:
return fail_value
def get_fixed_length_c_string(
self,
n,
fail_value='',
isprint_only_with_space_padding=False):
'''Extract a single fixed length C string from the binary file at the current file position, returns a single C string'''
s = self.read_size(n)
if s:
cstr, = struct.unpack(self.byte_order + ("%i" % n) + 's', s)
# Strip trialing NULLs
cstr = cstr.decode()
cstr = cstr.strip("\0")
if isprint_only_with_space_padding:
for c in cstr:
if c in string.printable or ord(c) == 0:
continue
return fail_value
return cstr
else:
return fail_value
def get_c_string(self):
'''Extract a single NULL terminated C string from the binary file at the current file position, returns a single C string'''
cstr = ''
byte = self.get_uint8()
while byte != 0:
cstr += "%c" % byte
byte = self.get_uint8()
return cstr
def get_n_sint8(self, n, fail_value=0):
'''Extract "n" int8_t integers from the binary file at the current file position, returns a list of integers'''
s = self.read_size(n)
if s:
return struct.unpack(self.byte_order + ("%u" % n) + 'b', s)
else:
return (fail_value,) * n
def get_n_uint8(self, n, fail_value=0):
'''Extract "n" uint8_t integers from the binary file at the current file position, returns a list of integers'''
s = self.read_size(n)
if s:
return struct.unpack(self.byte_order + ("%u" % n) + 'B', s)
else:
return (fail_value,) * n
def get_n_sint16(self, n, fail_value=0):
'''Extract "n" int16_t integers from the binary file at the current file position, returns a list of integers'''
s = self.read_size(2 * n)
if s:
return struct.unpack(self.byte_order + ("%u" % n) + 'h', s)
else:
return (fail_value,) * n
def get_n_uint16(self, n, fail_value=0):
'''Extract "n" uint16_t integers from the binary file at the current file position, returns a list of integers'''
s = self.read_size(2 * n)
if s:
return struct.unpack(self.byte_order + ("%u" % n) + 'H', s)
else:
return (fail_value,) * n
def get_n_sint32(self, n, fail_value=0):
'''Extract "n" int32_t integers from the binary file at the current file position, returns a list of integers'''
s = self.read_size(4 * n)
if s:
return struct.unpack(self.byte_order + ("%u" % n) + 'i', s)
else:
return (fail_value,) * n
def get_n_uint32(self, n, fail_value=0):
'''Extract "n" uint32_t integers from the binary file at the current file position, returns a list of integers'''
s = self.read_size(4 * n)
if s:
return struct.unpack(self.byte_order + ("%u" % n) + 'I', s)
else:
return (fail_value,) * n
def get_n_sint64(self, n, fail_value=0):
'''Extract "n" int64_t integers from the binary file at the current file position, returns a list of integers'''
s = self.read_size(8 * n)
if s:
return struct.unpack(self.byte_order + ("%u" % n) + 'q', s)
else:
return (fail_value,) * n
def get_n_uint64(self, n, fail_value=0):
'''Extract "n" uint64_t integers from the binary file at the current file position, returns a list of integers'''
s = self.read_size(8 * n)
if s:
return struct.unpack(self.byte_order + ("%u" % n) + 'Q', s)
else:
return (fail_value,) * n
class LookupDictionary(dict):
"""
a dictionary which can lookup value by key, or keys by value
"""
def __init__(self, items=[]):
"""items can be a list of pair_lists or a dictionary"""
dict.__init__(self, items)
def get_keys_for_value(self, value, fail_value=None):
"""find the key(s) as a list given a value"""
list_result = [item[0] for item in self.items() if item[1] == value]
if len(list_result) > 0:
return list_result
return fail_value
def get_first_key_for_value(self, value, fail_value=None):
"""return the first key of this dictionary given the value"""
list_result = [item[0] for item in self.items() if item[1] == value]
if len(list_result) > 0:
return list_result[0]
return fail_value
def get_value(self, key, fail_value=None):
"""find the value given a key"""
if key in self:
return self[key]
return fail_value
class Enum(LookupDictionary):
def __init__(self, initial_value=0, items=[]):
"""items can be a list of pair_lists or a dictionary"""
LookupDictionary.__init__(self, items)
self.value = initial_value
def set_value(self, v):
v_typename = typeof(v).__name__
if v_typename == 'str':
if str in self:
v = self[v]
else:
v = 0
else:
self.value = v
def get_enum_value(self):
return self.value
def get_enum_name(self):
return self.__str__()
def __str__(self):
s = self.get_first_key_for_value(self.value, None)
if s is None:
s = "%#8.8x" % self.value
return s
def __repr__(self):
return self.__str__()
#################################################################################
############################ Mach-O Parser ######################################
#################################################################################
# Mach header "magic" constants
MH_MAGIC = 0xfeedface
MH_CIGAM = 0xcefaedfe
MH_MAGIC_64 = 0xfeedfacf
MH_CIGAM_64 = 0xcffaedfe
FAT_MAGIC = 0xcafebabe
FAT_CIGAM = 0xbebafeca
# Mach haeder "filetype" constants
MH_OBJECT = 0x00000001
MH_EXECUTE = 0x00000002
MH_FVMLIB = 0x00000003
MH_CORE = 0x00000004
MH_PRELOAD = 0x00000005
MH_DYLIB = 0x00000006
MH_DYLINKER = 0x00000007
MH_BUNDLE = 0x00000008
MH_DYLIB_STUB = 0x00000009
MH_DSYM = 0x0000000a
MH_KEXT_BUNDLE = 0x0000000b
# Mach haeder "flag" constant bits
MH_NOUNDEFS = 0x00000001
MH_INCRLINK = 0x00000002
MH_DYLDLINK = 0x00000004
MH_BINDATLOAD = 0x00000008
MH_PREBOUND = 0x00000010
MH_SPLIT_SEGS = 0x00000020
MH_LAZY_INIT = 0x00000040
MH_TWOLEVEL = 0x00000080
MH_FORCE_FLAT = 0x00000100
MH_NOMULTIDEFS = 0x00000200
MH_NOFIXPREBINDING = 0x00000400
MH_PREBINDABLE = 0x00000800
MH_ALLMODSBOUND = 0x00001000
MH_SUBSECTIONS_VIA_SYMBOLS = 0x00002000
MH_CANONICAL = 0x00004000
MH_WEAK_DEFINES = 0x00008000
MH_BINDS_TO_WEAK = 0x00010000
MH_ALLOW_STACK_EXECUTION = 0x00020000
MH_ROOT_SAFE = 0x00040000
MH_SETUID_SAFE = 0x00080000
MH_NO_REEXPORTED_DYLIBS = 0x00100000
MH_PIE = 0x00200000
MH_DEAD_STRIPPABLE_DYLIB = 0x00400000
MH_HAS_TLV_DESCRIPTORS = 0x00800000
MH_NO_HEAP_EXECUTION = 0x01000000
# Mach load command constants
LC_REQ_DYLD = 0x80000000
LC_SEGMENT = 0x00000001
LC_SYMTAB = 0x00000002
LC_SYMSEG = 0x00000003
LC_THREAD = 0x00000004
LC_UNIXTHREAD = 0x00000005
LC_LOADFVMLIB = 0x00000006
LC_IDFVMLIB = 0x00000007
LC_IDENT = 0x00000008
LC_FVMFILE = 0x00000009
LC_PREPAGE = 0x0000000a
LC_DYSYMTAB = 0x0000000b
LC_LOAD_DYLIB = 0x0000000c
LC_ID_DYLIB = 0x0000000d
LC_LOAD_DYLINKER = 0x0000000e
LC_ID_DYLINKER = 0x0000000f
LC_PREBOUND_DYLIB = 0x00000010
LC_ROUTINES = 0x00000011
LC_SUB_FRAMEWORK = 0x00000012
LC_SUB_UMBRELLA = 0x00000013
LC_SUB_CLIENT = 0x00000014
LC_SUB_LIBRARY = 0x00000015
LC_TWOLEVEL_HINTS = 0x00000016
LC_PREBIND_CKSUM = 0x00000017
LC_LOAD_WEAK_DYLIB = 0x00000018 | LC_REQ_DYLD
LC_SEGMENT_64 = 0x00000019
LC_ROUTINES_64 = 0x0000001a
LC_UUID = 0x0000001b
LC_RPATH = 0x0000001c | LC_REQ_DYLD
LC_CODE_SIGNATURE = 0x0000001d
LC_SEGMENT_SPLIT_INFO = 0x0000001e
LC_REEXPORT_DYLIB = 0x0000001f | LC_REQ_DYLD
LC_LAZY_LOAD_DYLIB = 0x00000020
LC_ENCRYPTION_INFO = 0x00000021
LC_DYLD_INFO = 0x00000022
LC_DYLD_INFO_ONLY = 0x00000022 | LC_REQ_DYLD
LC_LOAD_UPWARD_DYLIB = 0x00000023 | LC_REQ_DYLD
LC_VERSION_MIN_MACOSX = 0x00000024
LC_VERSION_MIN_IPHONEOS = 0x00000025
LC_FUNCTION_STARTS = 0x00000026
LC_DYLD_ENVIRONMENT = 0x00000027
# Mach CPU constants
CPU_ARCH_MASK = 0xff000000
CPU_ARCH_ABI64 = 0x01000000
CPU_TYPE_ANY = 0xffffffff
CPU_TYPE_VAX = 1
CPU_TYPE_MC680x0 = 6
CPU_TYPE_I386 = 7
CPU_TYPE_X86_64 = CPU_TYPE_I386 | CPU_ARCH_ABI64
CPU_TYPE_ARM = 12
CPU_TYPE_ARM64 = CPU_TYPE_ARM | CPU_ARCH_ABI64
# VM protection constants
VM_PROT_READ = 1
VM_PROT_WRITE = 2
VM_PROT_EXECUTE = 4
# VM protection constants
N_STAB = 0xe0
N_PEXT = 0x10
N_TYPE = 0x0e
N_EXT = 0x01
# Values for nlist N_TYPE bits of the "Mach.NList.type" field.
N_UNDF = 0x0
N_ABS = 0x2
N_SECT = 0xe
N_PBUD = 0xc
N_INDR = 0xa
# Section indexes for the "Mach.NList.sect_idx" fields
NO_SECT = 0
MAX_SECT = 255
# Stab defines
N_GSYM = 0x20
N_FNAME = 0x22
N_FUN = 0x24
N_STSYM = 0x26
N_LCSYM = 0x28
N_BNSYM = 0x2e
N_OPT = 0x3c
N_RSYM = 0x40
N_SLINE = 0x44
N_ENSYM = 0x4e
N_SSYM = 0x60
N_SO = 0x64
N_OSO = 0x66
N_LSYM = 0x80
N_BINCL = 0x82
N_SOL = 0x84
N_PARAMS = 0x86
N_VERSION = 0x88
N_OLEVEL = 0x8A
N_PSYM = 0xa0
N_EINCL = 0xa2
N_ENTRY = 0xa4
N_LBRAC = 0xc0
N_EXCL = 0xc2
N_RBRAC = 0xe0
N_BCOMM = 0xe2
N_ECOMM = 0xe4
N_ECOML = 0xe8
N_LENG = 0xfe
vm_prot_names = ['---', 'r--', '-w-', 'rw-', '--x', 'r-x', '-wx', 'rwx']
class Mach:
"""Class that does everything mach-o related"""
class Arch:
"""Class that implements mach-o architectures"""