1688 lines
70 KiB
Python
Executable File
1688 lines
70 KiB
Python
Executable File
#!/usr/bin/python
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import cmd
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import dict_utils
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import file_extract
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import optparse
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import re
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import struct
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import string
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import StringIO
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import sys
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import uuid
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# Mach header "magic" constants
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MH_MAGIC = 0xfeedface
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MH_CIGAM = 0xcefaedfe
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MH_MAGIC_64 = 0xfeedfacf
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MH_CIGAM_64 = 0xcffaedfe
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FAT_MAGIC = 0xcafebabe
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FAT_CIGAM = 0xbebafeca
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# Mach haeder "filetype" constants
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MH_OBJECT = 0x00000001
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MH_EXECUTE = 0x00000002
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MH_FVMLIB = 0x00000003
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MH_CORE = 0x00000004
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MH_PRELOAD = 0x00000005
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MH_DYLIB = 0x00000006
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MH_DYLINKER = 0x00000007
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MH_BUNDLE = 0x00000008
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MH_DYLIB_STUB = 0x00000009
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MH_DSYM = 0x0000000a
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MH_KEXT_BUNDLE = 0x0000000b
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# Mach haeder "flag" constant bits
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MH_NOUNDEFS = 0x00000001
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MH_INCRLINK = 0x00000002
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MH_DYLDLINK = 0x00000004
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MH_BINDATLOAD = 0x00000008
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MH_PREBOUND = 0x00000010
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MH_SPLIT_SEGS = 0x00000020
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MH_LAZY_INIT = 0x00000040
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MH_TWOLEVEL = 0x00000080
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MH_FORCE_FLAT = 0x00000100
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MH_NOMULTIDEFS = 0x00000200
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MH_NOFIXPREBINDING = 0x00000400
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MH_PREBINDABLE = 0x00000800
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MH_ALLMODSBOUND = 0x00001000
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MH_SUBSECTIONS_VIA_SYMBOLS = 0x00002000
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MH_CANONICAL = 0x00004000
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MH_WEAK_DEFINES = 0x00008000
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MH_BINDS_TO_WEAK = 0x00010000
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MH_ALLOW_STACK_EXECUTION = 0x00020000
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MH_ROOT_SAFE = 0x00040000
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MH_SETUID_SAFE = 0x00080000
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MH_NO_REEXPORTED_DYLIBS = 0x00100000
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MH_PIE = 0x00200000
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MH_DEAD_STRIPPABLE_DYLIB = 0x00400000
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MH_HAS_TLV_DESCRIPTORS = 0x00800000
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MH_NO_HEAP_EXECUTION = 0x01000000
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# Mach load command constants
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LC_REQ_DYLD = 0x80000000
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LC_SEGMENT = 0x00000001
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LC_SYMTAB = 0x00000002
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LC_SYMSEG = 0x00000003
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LC_THREAD = 0x00000004
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LC_UNIXTHREAD = 0x00000005
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LC_LOADFVMLIB = 0x00000006
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LC_IDFVMLIB = 0x00000007
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LC_IDENT = 0x00000008
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LC_FVMFILE = 0x00000009
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LC_PREPAGE = 0x0000000a
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LC_DYSYMTAB = 0x0000000b
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LC_LOAD_DYLIB = 0x0000000c
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LC_ID_DYLIB = 0x0000000d
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LC_LOAD_DYLINKER = 0x0000000e
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LC_ID_DYLINKER = 0x0000000f
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LC_PREBOUND_DYLIB = 0x00000010
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LC_ROUTINES = 0x00000011
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LC_SUB_FRAMEWORK = 0x00000012
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LC_SUB_UMBRELLA = 0x00000013
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LC_SUB_CLIENT = 0x00000014
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LC_SUB_LIBRARY = 0x00000015
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LC_TWOLEVEL_HINTS = 0x00000016
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LC_PREBIND_CKSUM = 0x00000017
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LC_LOAD_WEAK_DYLIB = 0x00000018 | LC_REQ_DYLD
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LC_SEGMENT_64 = 0x00000019
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LC_ROUTINES_64 = 0x0000001a
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LC_UUID = 0x0000001b
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LC_RPATH = 0x0000001c | LC_REQ_DYLD
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LC_CODE_SIGNATURE = 0x0000001d
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LC_SEGMENT_SPLIT_INFO = 0x0000001e
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LC_REEXPORT_DYLIB = 0x0000001f | LC_REQ_DYLD
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LC_LAZY_LOAD_DYLIB = 0x00000020
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LC_ENCRYPTION_INFO = 0x00000021
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LC_DYLD_INFO = 0x00000022
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LC_DYLD_INFO_ONLY = 0x00000022 | LC_REQ_DYLD
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LC_LOAD_UPWARD_DYLIB = 0x00000023 | LC_REQ_DYLD
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LC_VERSION_MIN_MACOSX = 0x00000024
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LC_VERSION_MIN_IPHONEOS = 0x00000025
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LC_FUNCTION_STARTS = 0x00000026
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LC_DYLD_ENVIRONMENT = 0x00000027
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# Mach CPU constants
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CPU_ARCH_MASK = 0xff000000
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CPU_ARCH_ABI64 = 0x01000000
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CPU_TYPE_ANY = 0xffffffff
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CPU_TYPE_VAX = 1
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CPU_TYPE_MC680x0 = 6
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CPU_TYPE_I386 = 7
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CPU_TYPE_X86_64 = CPU_TYPE_I386 | CPU_ARCH_ABI64
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CPU_TYPE_MIPS = 8
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CPU_TYPE_MC98000 = 10
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CPU_TYPE_HPPA = 11
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CPU_TYPE_ARM = 12
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CPU_TYPE_MC88000 = 13
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CPU_TYPE_SPARC = 14
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CPU_TYPE_I860 = 15
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CPU_TYPE_ALPHA = 16
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CPU_TYPE_POWERPC = 18
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CPU_TYPE_POWERPC64 = CPU_TYPE_POWERPC | CPU_ARCH_ABI64
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# VM protection constants
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VM_PROT_READ = 1
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VM_PROT_WRITE = 2
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VM_PROT_EXECUTE = 4
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# VM protection constants
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N_STAB = 0xe0
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N_PEXT = 0x10
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N_TYPE = 0x0e
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N_EXT = 0x01
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# Values for nlist N_TYPE bits of the "Mach.NList.type" field.
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N_UNDF = 0x0
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N_ABS = 0x2
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N_SECT = 0xe
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N_PBUD = 0xc
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N_INDR = 0xa
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# Section indexes for the "Mach.NList.sect_idx" fields
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NO_SECT = 0
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MAX_SECT = 255
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# Stab defines
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N_GSYM = 0x20
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N_FNAME = 0x22
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N_FUN = 0x24
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N_STSYM = 0x26
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N_LCSYM = 0x28
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N_BNSYM = 0x2e
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N_OPT = 0x3c
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N_RSYM = 0x40
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N_SLINE = 0x44
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N_ENSYM = 0x4e
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N_SSYM = 0x60
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N_SO = 0x64
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N_OSO = 0x66
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N_LSYM = 0x80
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N_BINCL = 0x82
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N_SOL = 0x84
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N_PARAMS = 0x86
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N_VERSION = 0x88
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N_OLEVEL = 0x8A
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N_PSYM = 0xa0
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N_EINCL = 0xa2
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N_ENTRY = 0xa4
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N_LBRAC = 0xc0
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N_EXCL = 0xc2
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N_RBRAC = 0xe0
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N_BCOMM = 0xe2
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N_ECOMM = 0xe4
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N_ECOML = 0xe8
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N_LENG = 0xfe
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vm_prot_names = [ '---', 'r--', '-w-', 'rw-', '--x', 'r-x', '-wx', 'rwx' ]
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def dump_memory(base_addr, data, hex_bytes_len, num_per_line):
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hex_bytes = data.encode('hex')
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if hex_bytes_len == -1:
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hex_bytes_len = len(hex_bytes)
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addr = base_addr
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ascii_str = ''
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i = 0
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while i < hex_bytes_len:
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if ((i/2) % num_per_line) == 0:
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if i > 0:
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print ' %s' % (ascii_str)
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ascii_str = ''
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print '0x%8.8x:' % (addr+i),
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hex_byte = hex_bytes[i:i+2]
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print hex_byte,
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int_byte = int (hex_byte, 16)
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ascii_char = '%c' % (int_byte)
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if int_byte >= 32 and int_byte < 127:
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ascii_str += ascii_char
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else:
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ascii_str += '.'
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i = i + 2
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if ascii_str:
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if (i/2) % num_per_line:
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padding = num_per_line - ((i/2) % num_per_line)
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else:
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padding = 0
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print '%*s%s' % (padding*3+1,'',ascii_str)
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print
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class TerminalColors:
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'''Simple terminal colors class'''
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def __init__(self, enabled = True):
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# TODO: discover terminal type from "file" and disable if
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# it can't handle the color codes
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self.enabled = enabled
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def reset(self):
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'''Reset all terminal colors and formatting.'''
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if self.enabled:
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return "\x1b[0m";
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return ''
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def bold(self, on = True):
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'''Enable or disable bold depending on the "on" parameter.'''
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if self.enabled:
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if on:
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return "\x1b[1m";
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else:
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return "\x1b[22m";
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return ''
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def italics(self, on = True):
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'''Enable or disable italics depending on the "on" parameter.'''
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if self.enabled:
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if on:
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return "\x1b[3m";
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else:
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return "\x1b[23m";
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return ''
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def underline(self, on = True):
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'''Enable or disable underline depending on the "on" parameter.'''
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if self.enabled:
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if on:
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return "\x1b[4m";
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else:
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return "\x1b[24m";
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return ''
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def inverse(self, on = True):
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'''Enable or disable inverse depending on the "on" parameter.'''
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if self.enabled:
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if on:
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return "\x1b[7m";
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else:
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return "\x1b[27m";
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return ''
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def strike(self, on = True):
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'''Enable or disable strike through depending on the "on" parameter.'''
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if self.enabled:
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if on:
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return "\x1b[9m";
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else:
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return "\x1b[29m";
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return ''
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def black(self, fg = True):
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'''Set the foreground or background color to black.
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The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.'''
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if self.enabled:
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if fg:
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return "\x1b[30m";
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else:
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return "\x1b[40m";
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return ''
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def red(self, fg = True):
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'''Set the foreground or background color to red.
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The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.'''
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if self.enabled:
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if fg:
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return "\x1b[31m";
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else:
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return "\x1b[41m";
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return ''
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def green(self, fg = True):
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'''Set the foreground or background color to green.
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The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.'''
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if self.enabled:
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if fg:
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return "\x1b[32m";
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else:
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return "\x1b[42m";
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return ''
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def yellow(self, fg = True):
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'''Set the foreground or background color to yellow.
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The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.'''
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if self.enabled:
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if fg:
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return "\x1b[43m";
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else:
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return "\x1b[33m";
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return ''
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def blue(self, fg = True):
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'''Set the foreground or background color to blue.
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The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.'''
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if self.enabled:
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if fg:
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return "\x1b[34m";
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else:
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return "\x1b[44m";
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return ''
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def magenta(self, fg = True):
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'''Set the foreground or background color to magenta.
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The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.'''
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if self.enabled:
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if fg:
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return "\x1b[35m";
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else:
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return "\x1b[45m";
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return ''
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def cyan(self, fg = True):
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'''Set the foreground or background color to cyan.
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The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.'''
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if self.enabled:
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if fg:
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return "\x1b[36m";
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else:
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return "\x1b[46m";
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return ''
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def white(self, fg = True):
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'''Set the foreground or background color to white.
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The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.'''
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if self.enabled:
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if fg:
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return "\x1b[37m";
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else:
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return "\x1b[47m";
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return ''
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def default(self, fg = True):
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'''Set the foreground or background color to the default.
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The foreground color will be set if "fg" tests True. The background color will be set if "fg" tests False.'''
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if self.enabled:
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if fg:
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return "\x1b[39m";
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else:
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return "\x1b[49m";
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return ''
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def swap_unpack_char():
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"""Returns the unpack prefix that will for non-native endian-ness."""
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if struct.pack('H', 1).startswith("\x00"):
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return '<'
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return '>'
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def dump_hex_bytes(addr, s, bytes_per_line=16):
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i = 0
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line = ''
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for ch in s:
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if (i % bytes_per_line) == 0:
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if line:
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print line
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line = '%#8.8x: ' % (addr + i)
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line += "%02X " % ord(ch)
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i += 1
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print line
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def dump_hex_byte_string_diff(addr, a, b, bytes_per_line=16):
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i = 0
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line = ''
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a_len = len(a)
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b_len = len(b)
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if a_len < b_len:
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max_len = b_len
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else:
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max_len = a_len
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tty_colors = TerminalColors (True)
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for i in range(max_len):
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ch = None
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if i < a_len:
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ch_a = a[i]
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ch = ch_a
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else:
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ch_a = None
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if i < b_len:
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ch_b = b[i]
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if not ch:
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ch = ch_b
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else:
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ch_b = None
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mismatch = ch_a != ch_b
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if (i % bytes_per_line) == 0:
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if line:
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print line
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line = '%#8.8x: ' % (addr + i)
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if mismatch: line += tty_colors.red()
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line += "%02X " % ord(ch)
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if mismatch: line += tty_colors.default()
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i += 1
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print line
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class Mach:
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"""Class that does everything mach-o related"""
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class Arch:
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"""Class that implements mach-o architectures"""
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def __init__(self, c=0, s=0):
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self.cpu=c
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self.sub=s
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def set_cpu_type(self, c):
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self.cpu=c
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def set_cpu_subtype(self, s):
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self.sub=s
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def set_arch(self, c, s):
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self.cpu=c
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self.sub=s
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def is_64_bit(self):
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return (self.cpu & CPU_ARCH_ABI64) != 0
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cpu_infos = [
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[ "arm" , CPU_TYPE_ARM , CPU_TYPE_ANY ],
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[ "arm" , CPU_TYPE_ARM , 0 ],
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[ "armv4" , CPU_TYPE_ARM , 5 ],
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[ "armv6" , CPU_TYPE_ARM , 6 ],
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[ "armv5" , CPU_TYPE_ARM , 7 ],
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[ "xscale" , CPU_TYPE_ARM , 8 ],
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[ "armv7" , CPU_TYPE_ARM , 9 ],
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[ "armv7f" , CPU_TYPE_ARM , 10 ],
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[ "armv7s" , CPU_TYPE_ARM , 11 ],
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[ "armv7k" , CPU_TYPE_ARM , 12 ],
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[ "armv7m" , CPU_TYPE_ARM , 15 ],
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[ "armv7em" , CPU_TYPE_ARM , 16 ],
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[ "ppc" , CPU_TYPE_POWERPC , CPU_TYPE_ANY ],
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[ "ppc" , CPU_TYPE_POWERPC , 0 ],
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[ "ppc601" , CPU_TYPE_POWERPC , 1 ],
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[ "ppc602" , CPU_TYPE_POWERPC , 2 ],
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[ "ppc603" , CPU_TYPE_POWERPC , 3 ],
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[ "ppc603e" , CPU_TYPE_POWERPC , 4 ],
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[ "ppc603ev" , CPU_TYPE_POWERPC , 5 ],
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[ "ppc604" , CPU_TYPE_POWERPC , 6 ],
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[ "ppc604e" , CPU_TYPE_POWERPC , 7 ],
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[ "ppc620" , CPU_TYPE_POWERPC , 8 ],
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[ "ppc750" , CPU_TYPE_POWERPC , 9 ],
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[ "ppc7400" , CPU_TYPE_POWERPC , 10 ],
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[ "ppc7450" , CPU_TYPE_POWERPC , 11 ],
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[ "ppc970" , CPU_TYPE_POWERPC , 100 ],
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[ "ppc64" , CPU_TYPE_POWERPC64 , 0 ],
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[ "ppc970-64" , CPU_TYPE_POWERPC64 , 100 ],
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[ "i386" , CPU_TYPE_I386 , 3 ],
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[ "i486" , CPU_TYPE_I386 , 4 ],
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[ "i486sx" , CPU_TYPE_I386 , 0x84 ],
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[ "i386" , CPU_TYPE_I386 , CPU_TYPE_ANY ],
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[ "x86_64" , CPU_TYPE_X86_64 , 3 ],
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[ "x86_64" , CPU_TYPE_X86_64 , CPU_TYPE_ANY ],
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]
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def __str__(self):
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for info in self.cpu_infos:
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if self.cpu == info[1] and (self.sub & 0x00ffffff) == info[2]:
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return info[0]
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return "{0}.{1}".format(self.cpu,self.sub)
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class Magic(dict_utils.Enum):
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enum = {
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'MH_MAGIC' : MH_MAGIC,
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'MH_CIGAM' : MH_CIGAM,
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'MH_MAGIC_64' : MH_MAGIC_64,
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'MH_CIGAM_64' : MH_CIGAM_64,
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'FAT_MAGIC' : FAT_MAGIC,
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'FAT_CIGAM' : FAT_CIGAM
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}
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def __init__(self, initial_value = 0):
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dict_utils.Enum.__init__(self, initial_value, self.enum)
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def is_skinny_mach_file(self):
|
|
return self.value == MH_MAGIC or self.value == MH_CIGAM or self.value == MH_MAGIC_64 or self.value == MH_CIGAM_64
|
|
|
|
def is_universal_mach_file(self):
|
|
return self.value == FAT_MAGIC or self.value == FAT_CIGAM
|
|
|
|
def unpack(self, data):
|
|
data.set_byte_order('native')
|
|
self.value = data.get_uint32();
|
|
|
|
def get_byte_order(self):
|
|
if self.value == MH_CIGAM or self.value == MH_CIGAM_64 or self.value == FAT_CIGAM:
|
|
return swap_unpack_char()
|
|
else:
|
|
return '='
|
|
|
|
def is_64_bit(self):
|
|
return self.value == MH_MAGIC_64 or self.value == MH_CIGAM_64
|
|
|
|
def __init__(self):
|
|
self.magic = Mach.Magic()
|
|
self.content = None
|
|
self.path = None
|
|
|
|
def extract (self, path, extractor):
|
|
self.path = path;
|
|
self.unpack(extractor)
|
|
|
|
def parse(self, path):
|
|
self.path = path;
|
|
try:
|
|
f = open(self.path)
|
|
file_extractor = file_extract.FileExtract(f, '=')
|
|
self.unpack(file_extractor)
|
|
#f.close()
|
|
except IOError as (errno, strerror):
|
|
print "I/O error({0}): {1}".format(errno, strerror)
|
|
except ValueError:
|
|
print "Could not convert data to an integer."
|
|
except:
|
|
print "Unexpected error:", sys.exc_info()[0]
|
|
raise
|
|
|
|
def compare(self, rhs):
|
|
self.content.compare(rhs.content)
|
|
|
|
def dump(self, options = None):
|
|
self.content.dump(options)
|
|
|
|
def dump_header(self, dump_description = True, options = None):
|
|
self.content.dump_header(dump_description, options)
|
|
|
|
def dump_load_commands(self, dump_description = True, options = None):
|
|
self.content.dump_load_commands(dump_description, options)
|
|
|
|
def dump_sections(self, dump_description = True, options = None):
|
|
self.content.dump_sections(dump_description, options)
|
|
|
|
def dump_section_contents(self, options):
|
|
self.content.dump_section_contents(options)
|
|
|
|
def dump_symtab(self, dump_description = True, options = None):
|
|
self.content.dump_symtab(dump_description, options)
|
|
|
|
def dump_symbol_names_matching_regex(self, regex, file=None):
|
|
self.content.dump_symbol_names_matching_regex(regex, file)
|
|
|
|
def description(self):
|
|
return self.content.description()
|
|
|
|
def unpack(self, data):
|
|
self.magic.unpack(data)
|
|
if self.magic.is_skinny_mach_file():
|
|
self.content = Mach.Skinny(self.path)
|
|
elif self.magic.is_universal_mach_file():
|
|
self.content = Mach.Universal(self.path)
|
|
else:
|
|
self.content = None
|
|
|
|
if self.content != None:
|
|
self.content.unpack(data, self.magic)
|
|
|
|
def is_valid(self):
|
|
return self.content != None
|
|
|
|
class Universal:
|
|
|
|
def __init__(self, path):
|
|
self.path = path
|
|
self.type = 'universal'
|
|
self.file_off = 0
|
|
self.magic = None
|
|
self.nfat_arch = 0
|
|
self.archs = list()
|
|
|
|
def description(self):
|
|
s = '%#8.8x: %s (' % (self.file_off, self.path)
|
|
archs_string = ''
|
|
for arch in self.archs:
|
|
if len(archs_string):
|
|
archs_string += ', '
|
|
archs_string += '%s' % arch.arch
|
|
s += archs_string
|
|
s += ')'
|
|
return s
|
|
|
|
def unpack(self, data, magic = None):
|
|
self.file_off = data.tell()
|
|
if magic is None:
|
|
self.magic = Mach.Magic()
|
|
self.magic.unpack(data)
|
|
else:
|
|
self.magic = magic
|
|
self.file_off = self.file_off - 4
|
|
# Universal headers are always in big endian
|
|
data.set_byte_order('big')
|
|
self.nfat_arch = data.get_uint32()
|
|
for i in range(self.nfat_arch):
|
|
self.archs.append(Mach.Universal.ArchInfo())
|
|
self.archs[i].unpack(data)
|
|
for i in range(self.nfat_arch):
|
|
self.archs[i].mach = Mach.Skinny(self.path)
|
|
data.seek (self.archs[i].offset, 0)
|
|
skinny_magic = Mach.Magic()
|
|
skinny_magic.unpack (data)
|
|
self.archs[i].mach.unpack(data, skinny_magic)
|
|
|
|
def compare(self, rhs):
|
|
print 'error: comparing two universal files is not supported yet'
|
|
return False
|
|
|
|
def dump(self, options):
|
|
if options.dump_header:
|
|
print
|
|
print "Universal Mach File: magic = %s, nfat_arch = %u" % (self.magic, self.nfat_arch)
|
|
print
|
|
if self.nfat_arch > 0:
|
|
if options.dump_header:
|
|
self.archs[0].dump_header(True, options)
|
|
for i in range(self.nfat_arch):
|
|
self.archs[i].dump_flat(options)
|
|
if options.dump_header:
|
|
print
|
|
for i in range(self.nfat_arch):
|
|
self.archs[i].mach.dump(options)
|
|
|
|
def dump_header(self, dump_description = True, options = None):
|
|
if dump_description:
|
|
print self.description()
|
|
for i in range(self.nfat_arch):
|
|
self.archs[i].mach.dump_header(True, options)
|
|
print
|
|
|
|
def dump_load_commands(self, dump_description = True, options = None):
|
|
if dump_description:
|
|
print self.description()
|
|
for i in range(self.nfat_arch):
|
|
self.archs[i].mach.dump_load_commands(True, options)
|
|
print
|
|
|
|
def dump_sections(self, dump_description = True, options = None):
|
|
if dump_description:
|
|
print self.description()
|
|
for i in range(self.nfat_arch):
|
|
self.archs[i].mach.dump_sections(True, options)
|
|
print
|
|
|
|
def dump_section_contents(self, options):
|
|
for i in range(self.nfat_arch):
|
|
self.archs[i].mach.dump_section_contents(options)
|
|
print
|
|
|
|
def dump_symtab(self, dump_description = True, options = None):
|
|
if dump_description:
|
|
print self.description()
|
|
for i in range(self.nfat_arch):
|
|
self.archs[i].mach.dump_symtab(True, options)
|
|
print
|
|
|
|
def dump_symbol_names_matching_regex(self, regex, file=None):
|
|
for i in range(self.nfat_arch):
|
|
self.archs[i].mach.dump_symbol_names_matching_regex(regex, file)
|
|
|
|
class ArchInfo:
|
|
|
|
def __init__(self):
|
|
self.arch = Mach.Arch(0,0)
|
|
self.offset = 0
|
|
self.size = 0
|
|
self.align = 0
|
|
self.mach = None
|
|
|
|
def unpack(self, data):
|
|
# Universal headers are always in big endian
|
|
data.set_byte_order('big')
|
|
self.arch.cpu, self.arch.sub, self.offset, self.size, self.align = data.get_n_uint32(5)
|
|
|
|
def dump_header(self, dump_description = True, options = None):
|
|
if options.verbose:
|
|
print "CPU SUBTYPE OFFSET SIZE ALIGN"
|
|
print "---------- ---------- ---------- ---------- ----------"
|
|
else:
|
|
print "ARCH FILEOFFSET FILESIZE ALIGN"
|
|
print "---------- ---------- ---------- ----------"
|
|
def dump_flat(self, options):
|
|
if options.verbose:
|
|
print "%#8.8x %#8.8x %#8.8x %#8.8x %#8.8x" % (self.arch.cpu, self.arch.sub, self.offset, self.size, self.align)
|
|
else:
|
|
print "%-10s %#8.8x %#8.8x %#8.8x" % (self.arch, self.offset, self.size, self.align)
|
|
def dump(self):
|
|
print " cputype: %#8.8x" % self.arch.cpu
|
|
print "cpusubtype: %#8.8x" % self.arch.sub
|
|
print " offset: %#8.8x" % self.offset
|
|
print " size: %#8.8x" % self.size
|
|
print " align: %#8.8x" % self.align
|
|
def __str__(self):
|
|
return "Mach.Universal.ArchInfo: %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x" % (self.arch.cpu, self.arch.sub, self.offset, self.size, self.align)
|
|
def __repr__(self):
|
|
return "Mach.Universal.ArchInfo: %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x" % (self.arch.cpu, self.arch.sub, self.offset, self.size, self.align)
|
|
|
|
class Flags:
|
|
|
|
def __init__(self, b):
|
|
self.bits = b
|
|
|
|
def __str__(self):
|
|
s = ''
|
|
if self.bits & MH_NOUNDEFS:
|
|
s += 'MH_NOUNDEFS | '
|
|
if self.bits & MH_INCRLINK:
|
|
s += 'MH_INCRLINK | '
|
|
if self.bits & MH_DYLDLINK:
|
|
s += 'MH_DYLDLINK | '
|
|
if self.bits & MH_BINDATLOAD:
|
|
s += 'MH_BINDATLOAD | '
|
|
if self.bits & MH_PREBOUND:
|
|
s += 'MH_PREBOUND | '
|
|
if self.bits & MH_SPLIT_SEGS:
|
|
s += 'MH_SPLIT_SEGS | '
|
|
if self.bits & MH_LAZY_INIT:
|
|
s += 'MH_LAZY_INIT | '
|
|
if self.bits & MH_TWOLEVEL:
|
|
s += 'MH_TWOLEVEL | '
|
|
if self.bits & MH_FORCE_FLAT:
|
|
s += 'MH_FORCE_FLAT | '
|
|
if self.bits & MH_NOMULTIDEFS:
|
|
s += 'MH_NOMULTIDEFS | '
|
|
if self.bits & MH_NOFIXPREBINDING:
|
|
s += 'MH_NOFIXPREBINDING | '
|
|
if self.bits & MH_PREBINDABLE:
|
|
s += 'MH_PREBINDABLE | '
|
|
if self.bits & MH_ALLMODSBOUND:
|
|
s += 'MH_ALLMODSBOUND | '
|
|
if self.bits & MH_SUBSECTIONS_VIA_SYMBOLS:
|
|
s += 'MH_SUBSECTIONS_VIA_SYMBOLS | '
|
|
if self.bits & MH_CANONICAL:
|
|
s += 'MH_CANONICAL | '
|
|
if self.bits & MH_WEAK_DEFINES:
|
|
s += 'MH_WEAK_DEFINES | '
|
|
if self.bits & MH_BINDS_TO_WEAK:
|
|
s += 'MH_BINDS_TO_WEAK | '
|
|
if self.bits & MH_ALLOW_STACK_EXECUTION:
|
|
s += 'MH_ALLOW_STACK_EXECUTION | '
|
|
if self.bits & MH_ROOT_SAFE:
|
|
s += 'MH_ROOT_SAFE | '
|
|
if self.bits & MH_SETUID_SAFE:
|
|
s += 'MH_SETUID_SAFE | '
|
|
if self.bits & MH_NO_REEXPORTED_DYLIBS:
|
|
s += 'MH_NO_REEXPORTED_DYLIBS | '
|
|
if self.bits & MH_PIE:
|
|
s += 'MH_PIE | '
|
|
if self.bits & MH_DEAD_STRIPPABLE_DYLIB:
|
|
s += 'MH_DEAD_STRIPPABLE_DYLIB | '
|
|
if self.bits & MH_HAS_TLV_DESCRIPTORS:
|
|
s += 'MH_HAS_TLV_DESCRIPTORS | '
|
|
if self.bits & MH_NO_HEAP_EXECUTION:
|
|
s += 'MH_NO_HEAP_EXECUTION | '
|
|
# Strip the trailing " |" if we have any flags
|
|
if len(s) > 0:
|
|
s = s[0:-2]
|
|
return s
|
|
|
|
class FileType(dict_utils.Enum):
|
|
|
|
enum = {
|
|
'MH_OBJECT' : MH_OBJECT ,
|
|
'MH_EXECUTE' : MH_EXECUTE ,
|
|
'MH_FVMLIB' : MH_FVMLIB ,
|
|
'MH_CORE' : MH_CORE ,
|
|
'MH_PRELOAD' : MH_PRELOAD ,
|
|
'MH_DYLIB' : MH_DYLIB ,
|
|
'MH_DYLINKER' : MH_DYLINKER ,
|
|
'MH_BUNDLE' : MH_BUNDLE ,
|
|
'MH_DYLIB_STUB' : MH_DYLIB_STUB ,
|
|
'MH_DSYM' : MH_DSYM ,
|
|
'MH_KEXT_BUNDLE' : MH_KEXT_BUNDLE
|
|
}
|
|
|
|
def __init__(self, initial_value = 0):
|
|
dict_utils.Enum.__init__(self, initial_value, self.enum)
|
|
|
|
class Skinny:
|
|
|
|
def __init__(self, path):
|
|
self.path = path
|
|
self.type = 'skinny'
|
|
self.data = None
|
|
self.file_off = 0
|
|
self.magic = 0
|
|
self.arch = Mach.Arch(0,0)
|
|
self.filetype = Mach.FileType(0)
|
|
self.ncmds = 0
|
|
self.sizeofcmds = 0
|
|
self.flags = Mach.Flags(0)
|
|
self.uuid = None
|
|
self.commands = list()
|
|
self.segments = list()
|
|
self.sections = list()
|
|
self.symbols = list()
|
|
self.sections.append(Mach.Section())
|
|
|
|
def description(self):
|
|
return '%#8.8x: %s (%s)' % (self.file_off, self.path, self.arch)
|
|
|
|
def unpack(self, data, magic = None):
|
|
self.data = data
|
|
self.file_off = data.tell()
|
|
if magic is None:
|
|
self.magic = Mach.Magic()
|
|
self.magic.unpack(data)
|
|
else:
|
|
self.magic = magic
|
|
self.file_off = self.file_off - 4
|
|
data.set_byte_order(self.magic.get_byte_order())
|
|
self.arch.cpu, self.arch.sub, self.filetype.value, self.ncmds, self.sizeofcmds, bits = data.get_n_uint32(6)
|
|
self.flags.bits = bits
|
|
|
|
if self.is_64_bit():
|
|
data.get_uint32() # Skip reserved word in mach_header_64
|
|
|
|
for i in range(0,self.ncmds):
|
|
lc = self.unpack_load_command (data)
|
|
self.commands.append (lc)
|
|
|
|
def get_data(self):
|
|
if self.data:
|
|
self.data.set_byte_order(self.magic.get_byte_order())
|
|
return self.data
|
|
return None
|
|
|
|
def unpack_load_command (self, data):
|
|
lc = Mach.LoadCommand()
|
|
lc.unpack (self, data)
|
|
lc_command = lc.command.get_enum_value();
|
|
if (lc_command == LC_SEGMENT or
|
|
lc_command == LC_SEGMENT_64):
|
|
lc = Mach.SegmentLoadCommand(lc)
|
|
lc.unpack(self, data)
|
|
elif (lc_command == LC_LOAD_DYLIB or
|
|
lc_command == LC_ID_DYLIB or
|
|
lc_command == LC_LOAD_WEAK_DYLIB or
|
|
lc_command == LC_REEXPORT_DYLIB):
|
|
lc = Mach.DylibLoadCommand(lc)
|
|
lc.unpack(self, data)
|
|
elif (lc_command == LC_LOAD_DYLINKER or
|
|
lc_command == LC_SUB_FRAMEWORK or
|
|
lc_command == LC_SUB_CLIENT or
|
|
lc_command == LC_SUB_UMBRELLA or
|
|
lc_command == LC_SUB_LIBRARY or
|
|
lc_command == LC_ID_DYLINKER or
|
|
lc_command == LC_RPATH):
|
|
lc = Mach.LoadDYLDLoadCommand(lc)
|
|
lc.unpack(self, data)
|
|
elif (lc_command == LC_DYLD_INFO_ONLY):
|
|
lc = Mach.DYLDInfoOnlyLoadCommand(lc)
|
|
lc.unpack(self, data)
|
|
elif (lc_command == LC_SYMTAB):
|
|
lc = Mach.SymtabLoadCommand(lc)
|
|
lc.unpack(self, data)
|
|
elif (lc_command == LC_DYSYMTAB):
|
|
lc = Mach.DYLDSymtabLoadCommand(lc)
|
|
lc.unpack(self, data)
|
|
elif (lc_command == LC_UUID):
|
|
lc = Mach.UUIDLoadCommand(lc)
|
|
lc.unpack(self, data)
|
|
elif (lc_command == LC_CODE_SIGNATURE or
|
|
lc_command == LC_SEGMENT_SPLIT_INFO or
|
|
lc_command == LC_FUNCTION_STARTS):
|
|
lc = Mach.DataBlobLoadCommand(lc)
|
|
lc.unpack(self, data)
|
|
elif (lc_command == LC_UNIXTHREAD):
|
|
lc = Mach.UnixThreadLoadCommand(lc)
|
|
lc.unpack(self, data)
|
|
elif (lc_command == LC_ENCRYPTION_INFO):
|
|
lc = Mach.EncryptionInfoLoadCommand(lc)
|
|
lc.unpack(self, data)
|
|
lc.skip(data)
|
|
return lc
|
|
|
|
def compare(self, rhs):
|
|
print "\nComparing:"
|
|
print "a) %s %s" % (self.arch, self.path)
|
|
print "b) %s %s" % (rhs.arch, rhs.path)
|
|
result = True
|
|
if self.type == rhs.type:
|
|
for lhs_section in self.sections[1:]:
|
|
rhs_section = rhs.get_section_by_section(lhs_section)
|
|
if rhs_section:
|
|
print 'comparing %s.%s...' % (lhs_section.segname, lhs_section.sectname),
|
|
sys.stdout.flush()
|
|
lhs_data = lhs_section.get_contents (self)
|
|
rhs_data = rhs_section.get_contents (rhs)
|
|
if lhs_data and rhs_data:
|
|
if lhs_data == rhs_data:
|
|
print 'ok'
|
|
else:
|
|
lhs_data_len = len(lhs_data)
|
|
rhs_data_len = len(rhs_data)
|
|
# if lhs_data_len < rhs_data_len:
|
|
# if lhs_data == rhs_data[0:lhs_data_len]:
|
|
# print 'section data for %s matches the first %u bytes' % (lhs_section.sectname, lhs_data_len)
|
|
# else:
|
|
# # TODO: check padding
|
|
# result = False
|
|
# elif lhs_data_len > rhs_data_len:
|
|
# if lhs_data[0:rhs_data_len] == rhs_data:
|
|
# print 'section data for %s matches the first %u bytes' % (lhs_section.sectname, lhs_data_len)
|
|
# else:
|
|
# # TODO: check padding
|
|
# result = False
|
|
# else:
|
|
result = False
|
|
print 'error: sections differ'
|
|
#print 'a) %s' % (lhs_section)
|
|
# dump_hex_byte_string_diff(0, lhs_data, rhs_data)
|
|
#print 'b) %s' % (rhs_section)
|
|
# dump_hex_byte_string_diff(0, rhs_data, lhs_data)
|
|
elif lhs_data and not rhs_data:
|
|
print 'error: section data missing from b:'
|
|
print 'a) %s' % (lhs_section)
|
|
print 'b) %s' % (rhs_section)
|
|
result = False
|
|
elif not lhs_data and rhs_data:
|
|
print 'error: section data missing from a:'
|
|
print 'a) %s' % (lhs_section)
|
|
print 'b) %s' % (rhs_section)
|
|
result = False
|
|
elif lhs_section.offset or rhs_section.offset:
|
|
print 'error: section data missing for both a and b:'
|
|
print 'a) %s' % (lhs_section)
|
|
print 'b) %s' % (rhs_section)
|
|
result = False
|
|
else:
|
|
print 'ok'
|
|
else:
|
|
result = False
|
|
print 'error: section %s is missing in %s' % (lhs_section.sectname, rhs.path)
|
|
else:
|
|
print 'error: comaparing a %s mach-o file with a %s mach-o file is not supported' % (self.type, rhs.type)
|
|
result = False
|
|
if not result:
|
|
print 'error: mach files differ'
|
|
return result
|
|
def dump_header(self, dump_description = True, options = None):
|
|
if options.verbose:
|
|
print "MAGIC CPU SUBTYPE FILETYPE NUM CMDS SIZE CMDS FLAGS"
|
|
print "---------- ---------- ---------- ---------- -------- ---------- ----------"
|
|
else:
|
|
print "MAGIC ARCH FILETYPE NUM CMDS SIZE CMDS FLAGS"
|
|
print "------------ ---------- -------------- -------- ---------- ----------"
|
|
|
|
def dump_flat(self, options):
|
|
if options.verbose:
|
|
print "%#8.8x %#8.8x %#8.8x %#8.8x %#8u %#8.8x %#8.8x" % (self.magic, self.arch.cpu , self.arch.sub, self.filetype.value, self.ncmds, self.sizeofcmds, self.flags.bits)
|
|
else:
|
|
print "%-12s %-10s %-14s %#8u %#8.8x %s" % (self.magic, self.arch, self.filetype, self.ncmds, self.sizeofcmds, self.flags)
|
|
|
|
def dump(self, options):
|
|
if options.dump_header:
|
|
self.dump_header(True, options)
|
|
if options.dump_load_commands:
|
|
self.dump_load_commands(False, options)
|
|
if options.dump_sections:
|
|
self.dump_sections(False, options)
|
|
if options.section_names:
|
|
self.dump_section_contents(options)
|
|
if options.dump_symtab:
|
|
self.get_symtab()
|
|
if len(self.symbols):
|
|
self.dump_sections(False, options)
|
|
else:
|
|
print "No symbols"
|
|
if options.find_mangled:
|
|
self.dump_symbol_names_matching_regex (re.compile('^_?_Z'))
|
|
|
|
def dump_header(self, dump_description = True, options = None):
|
|
if dump_description:
|
|
print self.description()
|
|
print "Mach Header"
|
|
print " magic: %#8.8x %s" % (self.magic.value, self.magic)
|
|
print " cputype: %#8.8x %s" % (self.arch.cpu, self.arch)
|
|
print " cpusubtype: %#8.8x" % self.arch.sub
|
|
print " filetype: %#8.8x %s" % (self.filetype.get_enum_value(), self.filetype.get_enum_name())
|
|
print " ncmds: %#8.8x %u" % (self.ncmds, self.ncmds)
|
|
print " sizeofcmds: %#8.8x" % self.sizeofcmds
|
|
print " flags: %#8.8x %s" % (self.flags.bits, self.flags)
|
|
|
|
def dump_load_commands(self, dump_description = True, options = None):
|
|
if dump_description:
|
|
print self.description()
|
|
for lc in self.commands:
|
|
print lc
|
|
|
|
def get_section_by_name (self, name):
|
|
for section in self.sections:
|
|
if section.sectname and section.sectname == name:
|
|
return section
|
|
return None
|
|
|
|
def get_section_by_section (self, other_section):
|
|
for section in self.sections:
|
|
if section.sectname == other_section.sectname and section.segname == other_section.segname:
|
|
return section
|
|
return None
|
|
|
|
def dump_sections(self, dump_description = True, options = None):
|
|
if dump_description:
|
|
print self.description()
|
|
num_sections = len(self.sections)
|
|
if num_sections > 1:
|
|
self.sections[1].dump_header()
|
|
for sect_idx in range(1,num_sections):
|
|
print "%s" % self.sections[sect_idx]
|
|
|
|
def dump_section_contents(self, options):
|
|
saved_section_to_disk = False
|
|
for sectname in options.section_names:
|
|
section = self.get_section_by_name(sectname)
|
|
if section:
|
|
sect_bytes = section.get_contents (self)
|
|
if options.outfile:
|
|
if not saved_section_to_disk:
|
|
outfile = open(options.outfile, 'w')
|
|
if options.extract_modules:
|
|
#print "Extracting modules from mach file..."
|
|
data = file_extract.FileExtract(StringIO.StringIO(sect_bytes), self.data.byte_order)
|
|
version = data.get_uint32()
|
|
num_modules = data.get_uint32()
|
|
#print "version = %u, num_modules = %u" % (version, num_modules)
|
|
for i in range(num_modules):
|
|
data_offset = data.get_uint64()
|
|
data_size = data.get_uint64()
|
|
name_offset = data.get_uint32()
|
|
language = data.get_uint32()
|
|
flags = data.get_uint32()
|
|
data.seek (name_offset)
|
|
module_name = data.get_c_string()
|
|
#print "module[%u] data_offset = %#16.16x, data_size = %#16.16x, name_offset = %#16.16x (%s), language = %u, flags = %#x" % (i, data_offset, data_size, name_offset, module_name, language, flags)
|
|
data.seek (data_offset)
|
|
outfile.write(data.read_size (data_size))
|
|
else:
|
|
print "Saving section %s to '%s'" % (sectname, options.outfile)
|
|
outfile.write(sect_bytes)
|
|
outfile.close()
|
|
saved_section_to_disk = True
|
|
else:
|
|
print "error: you can only save a single section to disk at a time, skipping section '%s'" % (sectname)
|
|
else:
|
|
print 'section %s:\n' % (sectname)
|
|
section.dump_header()
|
|
print '%s\n' % (section)
|
|
dump_memory (0, sect_bytes, options.max_count, 16)
|
|
else:
|
|
print 'error: no section named "%s" was found' % (sectname)
|
|
|
|
def get_segment(self, segname):
|
|
if len(self.segments) == 1 and self.segments[0].segname == '':
|
|
return self.segments[0]
|
|
for segment in self.segments:
|
|
if segment.segname == segname:
|
|
return segment
|
|
return None
|
|
|
|
def get_first_load_command(self, lc_enum_value):
|
|
for lc in self.commands:
|
|
if lc.command.value == lc_enum_value:
|
|
return lc
|
|
return None
|
|
|
|
def get_symtab(self):
|
|
if self.data and not self.symbols:
|
|
lc_symtab = self.get_first_load_command (LC_SYMTAB)
|
|
if lc_symtab:
|
|
symtab_offset = self.file_off
|
|
if self.data.is_in_memory():
|
|
linkedit_segment = self.get_segment('__LINKEDIT')
|
|
if linkedit_segment:
|
|
linkedit_vmaddr = linkedit_segment.vmaddr
|
|
linkedit_fileoff = linkedit_segment.fileoff
|
|
symtab_offset = linkedit_vmaddr + lc_symtab.symoff - linkedit_fileoff
|
|
symtab_offset = linkedit_vmaddr + lc_symtab.stroff - linkedit_fileoff
|
|
else:
|
|
symtab_offset += lc_symtab.symoff
|
|
|
|
self.data.seek (symtab_offset)
|
|
is_64 = self.is_64_bit()
|
|
for i in range(lc_symtab.nsyms):
|
|
nlist = Mach.NList()
|
|
nlist.unpack (self, self.data, lc_symtab)
|
|
self.symbols.append(nlist)
|
|
else:
|
|
print "no LC_SYMTAB"
|
|
|
|
def dump_symtab(self, dump_description = True, options = None):
|
|
self.get_symtab()
|
|
if dump_description:
|
|
print self.description()
|
|
for i, symbol in enumerate(self.symbols):
|
|
print '[%5u] %s' % (i, symbol)
|
|
|
|
def dump_symbol_names_matching_regex(self, regex, file=None):
|
|
self.get_symtab()
|
|
for symbol in self.symbols:
|
|
if symbol.name and regex.search (symbol.name):
|
|
print symbol.name
|
|
if file:
|
|
file.write('%s\n' % (symbol.name))
|
|
|
|
def is_64_bit(self):
|
|
return self.magic.is_64_bit()
|
|
|
|
class LoadCommand:
|
|
class Command(dict_utils.Enum):
|
|
enum = {
|
|
'LC_SEGMENT' : LC_SEGMENT,
|
|
'LC_SYMTAB' : LC_SYMTAB,
|
|
'LC_SYMSEG' : LC_SYMSEG,
|
|
'LC_THREAD' : LC_THREAD,
|
|
'LC_UNIXTHREAD' : LC_UNIXTHREAD,
|
|
'LC_LOADFVMLIB' : LC_LOADFVMLIB,
|
|
'LC_IDFVMLIB' : LC_IDFVMLIB,
|
|
'LC_IDENT' : LC_IDENT,
|
|
'LC_FVMFILE' : LC_FVMFILE,
|
|
'LC_PREPAGE' : LC_PREPAGE,
|
|
'LC_DYSYMTAB' : LC_DYSYMTAB,
|
|
'LC_LOAD_DYLIB' : LC_LOAD_DYLIB,
|
|
'LC_ID_DYLIB' : LC_ID_DYLIB,
|
|
'LC_LOAD_DYLINKER' : LC_LOAD_DYLINKER,
|
|
'LC_ID_DYLINKER' : LC_ID_DYLINKER,
|
|
'LC_PREBOUND_DYLIB' : LC_PREBOUND_DYLIB,
|
|
'LC_ROUTINES' : LC_ROUTINES,
|
|
'LC_SUB_FRAMEWORK' : LC_SUB_FRAMEWORK,
|
|
'LC_SUB_UMBRELLA' : LC_SUB_UMBRELLA,
|
|
'LC_SUB_CLIENT' : LC_SUB_CLIENT,
|
|
'LC_SUB_LIBRARY' : LC_SUB_LIBRARY,
|
|
'LC_TWOLEVEL_HINTS' : LC_TWOLEVEL_HINTS,
|
|
'LC_PREBIND_CKSUM' : LC_PREBIND_CKSUM,
|
|
'LC_LOAD_WEAK_DYLIB' : LC_LOAD_WEAK_DYLIB,
|
|
'LC_SEGMENT_64' : LC_SEGMENT_64,
|
|
'LC_ROUTINES_64' : LC_ROUTINES_64,
|
|
'LC_UUID' : LC_UUID,
|
|
'LC_RPATH' : LC_RPATH,
|
|
'LC_CODE_SIGNATURE' : LC_CODE_SIGNATURE,
|
|
'LC_SEGMENT_SPLIT_INFO' : LC_SEGMENT_SPLIT_INFO,
|
|
'LC_REEXPORT_DYLIB' : LC_REEXPORT_DYLIB,
|
|
'LC_LAZY_LOAD_DYLIB' : LC_LAZY_LOAD_DYLIB,
|
|
'LC_ENCRYPTION_INFO' : LC_ENCRYPTION_INFO,
|
|
'LC_DYLD_INFO' : LC_DYLD_INFO,
|
|
'LC_DYLD_INFO_ONLY' : LC_DYLD_INFO_ONLY,
|
|
'LC_LOAD_UPWARD_DYLIB' : LC_LOAD_UPWARD_DYLIB,
|
|
'LC_VERSION_MIN_MACOSX' : LC_VERSION_MIN_MACOSX,
|
|
'LC_VERSION_MIN_IPHONEOS' : LC_VERSION_MIN_IPHONEOS,
|
|
'LC_FUNCTION_STARTS' : LC_FUNCTION_STARTS,
|
|
'LC_DYLD_ENVIRONMENT' : LC_DYLD_ENVIRONMENT
|
|
}
|
|
|
|
def __init__(self, initial_value = 0):
|
|
dict_utils.Enum.__init__(self, initial_value, self.enum)
|
|
|
|
|
|
def __init__(self, c=None, l=0,o=0):
|
|
if c != None:
|
|
self.command = c
|
|
else:
|
|
self.command = Mach.LoadCommand.Command(0)
|
|
self.length = l
|
|
self.file_off = o
|
|
|
|
def unpack(self, mach_file, data):
|
|
self.file_off = data.tell()
|
|
self.command.value, self.length = data.get_n_uint32(2)
|
|
|
|
def skip(self, data):
|
|
data.seek (self.file_off + self.length, 0)
|
|
|
|
def __str__(self):
|
|
lc_name = self.command.get_enum_name()
|
|
return '%#8.8x: <%#4.4x> %-24s' % (self.file_off, self.length, lc_name)
|
|
|
|
class Section:
|
|
|
|
def __init__(self):
|
|
self.index = 0
|
|
self.is_64 = False
|
|
self.sectname = None
|
|
self.segname = None
|
|
self.addr = 0
|
|
self.size = 0
|
|
self.offset = 0
|
|
self.align = 0
|
|
self.reloff = 0
|
|
self.nreloc = 0
|
|
self.flags = 0
|
|
self.reserved1 = 0
|
|
self.reserved2 = 0
|
|
self.reserved3 = 0
|
|
|
|
def unpack(self, is_64, data):
|
|
self.is_64 = is_64
|
|
self.sectname = data.get_fixed_length_c_string (16, '', True)
|
|
self.segname = data.get_fixed_length_c_string (16, '', True)
|
|
if self.is_64:
|
|
self.addr, self.size = data.get_n_uint64(2)
|
|
self.offset, self.align, self.reloff, self.nreloc, self.flags, self.reserved1, self.reserved2, self.reserved3 = data.get_n_uint32(8)
|
|
else:
|
|
self.addr, self.size = data.get_n_uint32(2)
|
|
self.offset, self.align, self.reloff, self.nreloc, self.flags, self.reserved1, self.reserved2 = data.get_n_uint32(7)
|
|
|
|
def dump_header(self):
|
|
if self.is_64:
|
|
print "INDEX ADDRESS SIZE OFFSET ALIGN RELOFF NRELOC FLAGS RESERVED1 RESERVED2 RESERVED3 NAME";
|
|
print "===== ------------------ ------------------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------------------";
|
|
else:
|
|
print "INDEX ADDRESS SIZE OFFSET ALIGN RELOFF NRELOC FLAGS RESERVED1 RESERVED2 NAME";
|
|
print "===== ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------------------";
|
|
|
|
def __str__(self):
|
|
if self.is_64:
|
|
return "[%3u] %#16.16x %#16.16x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %s.%s" % (self.index, self.addr, self.size, self.offset, self.align, self.reloff, self.nreloc, self.flags, self.reserved1, self.reserved2, self.reserved3, self.segname, self.sectname)
|
|
else:
|
|
return "[%3u] %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %#8.8x %s.%s" % (self.index, self.addr, self.size, self.offset, self.align, self.reloff, self.nreloc, self.flags, self.reserved1, self.reserved2, self.segname, self.sectname)
|
|
|
|
def get_contents(self, mach_file):
|
|
'''Get the section contents as a python string'''
|
|
if self.size > 0 and mach_file.get_segment(self.segname).filesize > 0:
|
|
data = mach_file.get_data()
|
|
if data:
|
|
section_data_offset = mach_file.file_off + self.offset
|
|
#print '%s.%s is at offset 0x%x with size 0x%x' % (self.segname, self.sectname, section_data_offset, self.size)
|
|
data.push_offset_and_seek (section_data_offset)
|
|
bytes = data.read_size(self.size)
|
|
data.pop_offset_and_seek()
|
|
return bytes
|
|
return None
|
|
|
|
class DylibLoadCommand(LoadCommand):
|
|
def __init__(self, lc):
|
|
Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off)
|
|
self.name = None
|
|
self.timestamp = 0
|
|
self.current_version = 0
|
|
self.compatibility_version = 0
|
|
|
|
def unpack(self, mach_file, data):
|
|
byte_order_char = mach_file.magic.get_byte_order()
|
|
name_offset, self.timestamp, self.current_version, self.compatibility_version = data.get_n_uint32(4)
|
|
data.seek(self.file_off + name_offset, 0)
|
|
self.name = data.get_fixed_length_c_string(self.length - 24)
|
|
|
|
def __str__(self):
|
|
s = Mach.LoadCommand.__str__(self);
|
|
s += "%#8.8x %#8.8x %#8.8x " % (self.timestamp, self.current_version, self.compatibility_version)
|
|
s += self.name
|
|
return s
|
|
|
|
class LoadDYLDLoadCommand(LoadCommand):
|
|
def __init__(self, lc):
|
|
Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off)
|
|
self.name = None
|
|
|
|
def unpack(self, mach_file, data):
|
|
data.get_uint32()
|
|
self.name = data.get_fixed_length_c_string(self.length - 12)
|
|
|
|
def __str__(self):
|
|
s = Mach.LoadCommand.__str__(self);
|
|
s += "%s" % self.name
|
|
return s
|
|
|
|
class UnixThreadLoadCommand(LoadCommand):
|
|
class ThreadState:
|
|
def __init__(self):
|
|
self.flavor = 0
|
|
self.count = 0
|
|
self.register_values = list()
|
|
|
|
def unpack(self, data):
|
|
self.flavor, self.count = data.get_n_uint32(2)
|
|
self.register_values = data.get_n_uint32(self.count)
|
|
|
|
def __str__(self):
|
|
s = "flavor = %u, count = %u, regs =" % (self.flavor, self.count)
|
|
i = 0
|
|
for register_value in self.register_values:
|
|
if i % 8 == 0:
|
|
s += "\n "
|
|
s += " %#8.8x" % register_value
|
|
i += 1
|
|
return s
|
|
|
|
def __init__(self, lc):
|
|
Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off)
|
|
self.reg_sets = list()
|
|
|
|
def unpack(self, mach_file, data):
|
|
reg_set = Mach.UnixThreadLoadCommand.ThreadState()
|
|
reg_set.unpack (data)
|
|
self.reg_sets.append(reg_set)
|
|
|
|
def __str__(self):
|
|
s = Mach.LoadCommand.__str__(self);
|
|
for reg_set in self.reg_sets:
|
|
s += "%s" % reg_set
|
|
return s
|
|
|
|
class DYLDInfoOnlyLoadCommand(LoadCommand):
|
|
def __init__(self, lc):
|
|
Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off)
|
|
self.rebase_off = 0
|
|
self.rebase_size = 0
|
|
self.bind_off = 0
|
|
self.bind_size = 0
|
|
self.weak_bind_off = 0
|
|
self.weak_bind_size = 0
|
|
self.lazy_bind_off = 0
|
|
self.lazy_bind_size = 0
|
|
self.export_off = 0
|
|
self.export_size = 0
|
|
|
|
def unpack(self, mach_file, data):
|
|
byte_order_char = mach_file.magic.get_byte_order()
|
|
self.rebase_off, self.rebase_size, self.bind_off, self.bind_size, self.weak_bind_off, self.weak_bind_size, self.lazy_bind_off, self.lazy_bind_size, self.export_off, self.export_size = data.get_n_uint32(10)
|
|
|
|
def __str__(self):
|
|
s = Mach.LoadCommand.__str__(self);
|
|
s += "rebase_off = %#8.8x, rebase_size = %u, " % (self.rebase_off, self.rebase_size)
|
|
s += "bind_off = %#8.8x, bind_size = %u, " % (self.bind_off, self.bind_size)
|
|
s += "weak_bind_off = %#8.8x, weak_bind_size = %u, " % (self.weak_bind_off, self.weak_bind_size)
|
|
s += "lazy_bind_off = %#8.8x, lazy_bind_size = %u, " % (self.lazy_bind_off, self.lazy_bind_size)
|
|
s += "export_off = %#8.8x, export_size = %u, " % (self.export_off, self.export_size)
|
|
return s
|
|
|
|
class DYLDSymtabLoadCommand(LoadCommand):
|
|
def __init__(self, lc):
|
|
Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off)
|
|
self.ilocalsym = 0
|
|
self.nlocalsym = 0
|
|
self.iextdefsym = 0
|
|
self.nextdefsym = 0
|
|
self.iundefsym = 0
|
|
self.nundefsym = 0
|
|
self.tocoff = 0
|
|
self.ntoc = 0
|
|
self.modtaboff = 0
|
|
self.nmodtab = 0
|
|
self.extrefsymoff = 0
|
|
self.nextrefsyms = 0
|
|
self.indirectsymoff = 0
|
|
self.nindirectsyms = 0
|
|
self.extreloff = 0
|
|
self.nextrel = 0
|
|
self.locreloff = 0
|
|
self.nlocrel = 0
|
|
|
|
def unpack(self, mach_file, data):
|
|
byte_order_char = mach_file.magic.get_byte_order()
|
|
self.ilocalsym, self.nlocalsym, self.iextdefsym, self.nextdefsym, self.iundefsym, self.nundefsym, self.tocoff, self.ntoc, self.modtaboff, self.nmodtab, self.extrefsymoff, self.nextrefsyms, self.indirectsymoff, self.nindirectsyms, self.extreloff, self.nextrel, self.locreloff, self.nlocrel = data.get_n_uint32(18)
|
|
|
|
def __str__(self):
|
|
s = Mach.LoadCommand.__str__(self);
|
|
# s += "ilocalsym = %u, nlocalsym = %u, " % (self.ilocalsym, self.nlocalsym)
|
|
# s += "iextdefsym = %u, nextdefsym = %u, " % (self.iextdefsym, self.nextdefsym)
|
|
# s += "iundefsym %u, nundefsym = %u, " % (self.iundefsym, self.nundefsym)
|
|
# s += "tocoff = %#8.8x, ntoc = %u, " % (self.tocoff, self.ntoc)
|
|
# s += "modtaboff = %#8.8x, nmodtab = %u, " % (self.modtaboff, self.nmodtab)
|
|
# s += "extrefsymoff = %#8.8x, nextrefsyms = %u, " % (self.extrefsymoff, self.nextrefsyms)
|
|
# s += "indirectsymoff = %#8.8x, nindirectsyms = %u, " % (self.indirectsymoff, self.nindirectsyms)
|
|
# s += "extreloff = %#8.8x, nextrel = %u, " % (self.extreloff, self.nextrel)
|
|
# s += "locreloff = %#8.8x, nlocrel = %u" % (self.locreloff, self.nlocrel)
|
|
s += "ilocalsym = %-10u, nlocalsym = %u\n" % (self.ilocalsym, self.nlocalsym)
|
|
s += " iextdefsym = %-10u, nextdefsym = %u\n" % (self.iextdefsym, self.nextdefsym)
|
|
s += " iundefsym = %-10u, nundefsym = %u\n" % (self.iundefsym, self.nundefsym)
|
|
s += " tocoff = %#8.8x, ntoc = %u\n" % (self.tocoff, self.ntoc)
|
|
s += " modtaboff = %#8.8x, nmodtab = %u\n" % (self.modtaboff, self.nmodtab)
|
|
s += " extrefsymoff = %#8.8x, nextrefsyms = %u\n" % (self.extrefsymoff, self.nextrefsyms)
|
|
s += " indirectsymoff = %#8.8x, nindirectsyms = %u\n" % (self.indirectsymoff, self.nindirectsyms)
|
|
s += " extreloff = %#8.8x, nextrel = %u\n" % (self.extreloff, self.nextrel)
|
|
s += " locreloff = %#8.8x, nlocrel = %u" % (self.locreloff, self.nlocrel)
|
|
return s
|
|
|
|
class SymtabLoadCommand(LoadCommand):
|
|
def __init__(self, lc):
|
|
Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off)
|
|
self.symoff = 0
|
|
self.nsyms = 0
|
|
self.stroff = 0
|
|
self.strsize = 0
|
|
|
|
def unpack(self, mach_file, data):
|
|
byte_order_char = mach_file.magic.get_byte_order()
|
|
self.symoff, self.nsyms, self.stroff, self.strsize = data.get_n_uint32(4)
|
|
|
|
def __str__(self):
|
|
s = Mach.LoadCommand.__str__(self);
|
|
s += "symoff = %#8.8x, nsyms = %u, stroff = %#8.8x, strsize = %u" % (self.symoff, self.nsyms, self.stroff, self.strsize)
|
|
return s
|
|
|
|
|
|
class UUIDLoadCommand(LoadCommand):
|
|
def __init__(self, lc):
|
|
Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off)
|
|
self.uuid = None
|
|
|
|
def unpack(self, mach_file, data):
|
|
uuid_data = data.get_n_uint8(16)
|
|
uuid_str = ''
|
|
for byte in uuid_data:
|
|
uuid_str += '%2.2x' % byte
|
|
self.uuid = uuid.UUID(uuid_str)
|
|
mach_file.uuid = self.uuid
|
|
|
|
def __str__(self):
|
|
s = Mach.LoadCommand.__str__(self);
|
|
s += self.uuid.__str__()
|
|
return s
|
|
|
|
class DataBlobLoadCommand(LoadCommand):
|
|
def __init__(self, lc):
|
|
Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off)
|
|
self.dataoff = 0
|
|
self.datasize = 0
|
|
|
|
def unpack(self, mach_file, data):
|
|
byte_order_char = mach_file.magic.get_byte_order()
|
|
self.dataoff, self.datasize = data.get_n_uint32(2)
|
|
|
|
def __str__(self):
|
|
s = Mach.LoadCommand.__str__(self);
|
|
s += "dataoff = %#8.8x, datasize = %u" % (self.dataoff, self.datasize)
|
|
return s
|
|
|
|
class EncryptionInfoLoadCommand(LoadCommand):
|
|
def __init__(self, lc):
|
|
Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off)
|
|
self.cryptoff = 0
|
|
self.cryptsize = 0
|
|
self.cryptid = 0
|
|
|
|
def unpack(self, mach_file, data):
|
|
byte_order_char = mach_file.magic.get_byte_order()
|
|
self.cryptoff, self.cryptsize, self.cryptid = data.get_n_uint32(3)
|
|
|
|
def __str__(self):
|
|
s = Mach.LoadCommand.__str__(self);
|
|
s += "file-range = [%#8.8x - %#8.8x), cryptsize = %u, cryptid = %u" % (self.cryptoff, self.cryptoff + self.cryptsize, self.cryptsize, self.cryptid)
|
|
return s
|
|
|
|
class SegmentLoadCommand(LoadCommand):
|
|
|
|
def __init__(self, lc):
|
|
Mach.LoadCommand.__init__(self, lc.command, lc.length, lc.file_off)
|
|
self.segname = None
|
|
self.vmaddr = 0
|
|
self.vmsize = 0
|
|
self.fileoff = 0
|
|
self.filesize = 0
|
|
self.maxprot = 0
|
|
self.initprot = 0
|
|
self.nsects = 0
|
|
self.flags = 0
|
|
|
|
def unpack(self, mach_file, data):
|
|
is_64 = self.command.get_enum_value() == LC_SEGMENT_64;
|
|
self.segname = data.get_fixed_length_c_string (16, '', True)
|
|
if is_64:
|
|
self.vmaddr, self.vmsize, self.fileoff, self.filesize = data.get_n_uint64(4)
|
|
else:
|
|
self.vmaddr, self.vmsize, self.fileoff, self.filesize = data.get_n_uint32(4)
|
|
self.maxprot, self.initprot, self.nsects, self.flags = data.get_n_uint32(4)
|
|
mach_file.segments.append(self)
|
|
for i in range(self.nsects):
|
|
section = Mach.Section()
|
|
section.unpack(is_64, data)
|
|
section.index = len (mach_file.sections)
|
|
mach_file.sections.append(section)
|
|
|
|
|
|
def __str__(self):
|
|
s = Mach.LoadCommand.__str__(self);
|
|
if self.command.get_enum_value() == LC_SEGMENT:
|
|
s += "%#8.8x %#8.8x %#8.8x %#8.8x " % (self.vmaddr, self.vmsize, self.fileoff, self.filesize)
|
|
else:
|
|
s += "%#16.16x %#16.16x %#16.16x %#16.16x " % (self.vmaddr, self.vmsize, self.fileoff, self.filesize)
|
|
s += "%s %s %3u %#8.8x" % (vm_prot_names[self.maxprot], vm_prot_names[self.initprot], self.nsects, self.flags)
|
|
s += ' ' + self.segname
|
|
return s
|
|
|
|
class NList:
|
|
class Type:
|
|
class Stab(dict_utils.Enum):
|
|
enum = {
|
|
'N_GSYM' : N_GSYM ,
|
|
'N_FNAME' : N_FNAME ,
|
|
'N_FUN' : N_FUN ,
|
|
'N_STSYM' : N_STSYM ,
|
|
'N_LCSYM' : N_LCSYM ,
|
|
'N_BNSYM' : N_BNSYM ,
|
|
'N_OPT' : N_OPT ,
|
|
'N_RSYM' : N_RSYM ,
|
|
'N_SLINE' : N_SLINE ,
|
|
'N_ENSYM' : N_ENSYM ,
|
|
'N_SSYM' : N_SSYM ,
|
|
'N_SO' : N_SO ,
|
|
'N_OSO' : N_OSO ,
|
|
'N_LSYM' : N_LSYM ,
|
|
'N_BINCL' : N_BINCL ,
|
|
'N_SOL' : N_SOL ,
|
|
'N_PARAMS' : N_PARAMS ,
|
|
'N_VERSION' : N_VERSION ,
|
|
'N_OLEVEL' : N_OLEVEL ,
|
|
'N_PSYM' : N_PSYM ,
|
|
'N_EINCL' : N_EINCL ,
|
|
'N_ENTRY' : N_ENTRY ,
|
|
'N_LBRAC' : N_LBRAC ,
|
|
'N_EXCL' : N_EXCL ,
|
|
'N_RBRAC' : N_RBRAC ,
|
|
'N_BCOMM' : N_BCOMM ,
|
|
'N_ECOMM' : N_ECOMM ,
|
|
'N_ECOML' : N_ECOML ,
|
|
'N_LENG' : N_LENG
|
|
}
|
|
|
|
def __init__(self, magic = 0):
|
|
dict_utils.Enum.__init__(self, magic, self.enum)
|
|
|
|
def __init__(self, t = 0):
|
|
self.value = t
|
|
|
|
def __str__(self):
|
|
n_type = self.value
|
|
if n_type & N_STAB:
|
|
stab = Mach.NList.Type.Stab(self.value)
|
|
return '%s' % stab
|
|
else:
|
|
type = self.value & N_TYPE
|
|
type_str = ''
|
|
if type == N_UNDF:
|
|
type_str = 'N_UNDF'
|
|
elif type == N_ABS:
|
|
type_str = 'N_ABS '
|
|
elif type == N_SECT:
|
|
type_str = 'N_SECT'
|
|
elif type == N_PBUD:
|
|
type_str = 'N_PBUD'
|
|
elif type == N_INDR:
|
|
type_str = 'N_INDR'
|
|
else:
|
|
type_str = "??? (%#2.2x)" % type
|
|
if n_type & N_PEXT:
|
|
type_str += ' | PEXT'
|
|
if n_type & N_EXT:
|
|
type_str += ' | EXT '
|
|
return type_str
|
|
|
|
|
|
def __init__(self):
|
|
self.index = 0
|
|
self.name_offset = 0
|
|
self.name = 0
|
|
self.type = Mach.NList.Type()
|
|
self.sect_idx = 0
|
|
self.desc = 0
|
|
self.value = 0
|
|
|
|
def unpack(self, mach_file, data, symtab_lc):
|
|
self.index = len(mach_file.symbols)
|
|
self.name_offset = data.get_uint32()
|
|
self.type.value, self.sect_idx = data.get_n_uint8(2)
|
|
self.desc = data.get_uint16()
|
|
if mach_file.is_64_bit():
|
|
self.value = data.get_uint64()
|
|
else:
|
|
self.value = data.get_uint32()
|
|
data.push_offset_and_seek (mach_file.file_off + symtab_lc.stroff + self.name_offset)
|
|
#print "get string for symbol[%u]" % self.index
|
|
self.name = data.get_c_string()
|
|
data.pop_offset_and_seek()
|
|
|
|
def __str__(self):
|
|
name_display = ''
|
|
if len(self.name):
|
|
name_display = ' "%s"' % self.name
|
|
return '%#8.8x %#2.2x (%-20s) %#2.2x %#4.4x %16.16x%s' % (self.name_offset, self.type.value, self.type, self.sect_idx, self.desc, self.value, name_display)
|
|
|
|
|
|
class Interactive(cmd.Cmd):
|
|
'''Interactive command interpreter to mach-o files.'''
|
|
|
|
def __init__(self, mach, options):
|
|
cmd.Cmd.__init__(self)
|
|
self.intro = 'Interactive mach-o command interpreter'
|
|
self.prompt = 'mach-o: %s %% ' % mach.path
|
|
self.mach = mach
|
|
self.options = options
|
|
|
|
def default(self, line):
|
|
'''Catch all for unknown command, which will exit the interpreter.'''
|
|
print "uknown command: %s" % line
|
|
return True
|
|
|
|
def do_q(self, line):
|
|
'''Quit command'''
|
|
return True
|
|
|
|
def do_quit(self, line):
|
|
'''Quit command'''
|
|
return True
|
|
|
|
def do_header(self, line):
|
|
'''Dump mach-o file headers'''
|
|
self.mach.dump_header(True, self.options)
|
|
return False
|
|
|
|
def do_load(self, line):
|
|
'''Dump all mach-o load commands'''
|
|
self.mach.dump_load_commands(True, self.options)
|
|
return False
|
|
|
|
def do_sections(self, line):
|
|
'''Dump all mach-o sections'''
|
|
self.mach.dump_sections(True, self.options)
|
|
return False
|
|
|
|
def do_symtab(self, line):
|
|
'''Dump all mach-o symbols in the symbol table'''
|
|
self.mach.dump_symtab(True, self.options)
|
|
return False
|
|
|
|
if __name__ == '__main__':
|
|
parser = optparse.OptionParser(description='A script that parses skinny and universal mach-o files.')
|
|
parser.add_option('--arch', '-a', type='string', metavar='arch', dest='archs', action='append', help='specify one or more architectures by name')
|
|
parser.add_option('-v', '--verbose', action='store_true', dest='verbose', help='display verbose debug info', default=False)
|
|
parser.add_option('-H', '--header', action='store_true', dest='dump_header', help='dump the mach-o file header', default=False)
|
|
parser.add_option('-l', '--load-commands', action='store_true', dest='dump_load_commands', help='dump the mach-o load commands', default=False)
|
|
parser.add_option('-s', '--symtab', action='store_true', dest='dump_symtab', help='dump the mach-o symbol table', default=False)
|
|
parser.add_option('-S', '--sections', action='store_true', dest='dump_sections', help='dump the mach-o sections', default=False)
|
|
parser.add_option('--section', type='string', metavar='sectname', dest='section_names', action='append', help='Specify one or more section names to dump', default=[])
|
|
parser.add_option('-o', '--out', type='string', dest='outfile', help='Used in conjunction with the --section=NAME option to save a single section\'s data to disk.', default=False)
|
|
parser.add_option('-i', '--interactive', action='store_true', dest='interactive', help='enable interactive mode', default=False)
|
|
parser.add_option('-m', '--mangled', action='store_true', dest='find_mangled', help='dump all mangled names in a mach file', default=False)
|
|
parser.add_option('-c', '--compare', action='store_true', dest='compare', help='compare two mach files', default=False)
|
|
parser.add_option('-M', '--extract-modules', action='store_true', dest='extract_modules', help='Extract modules from file', default=False)
|
|
parser.add_option('-C', '--count', type='int', dest='max_count', help='Sets the max byte count when dumping section data', default=-1)
|
|
|
|
(options, mach_files) = parser.parse_args()
|
|
if options.extract_modules:
|
|
if options.section_names:
|
|
print "error: can't use --section option with the --extract-modules option"
|
|
exit(1)
|
|
if not options.outfile:
|
|
print "error: the --output=FILE option must be specified with the --extract-modules option"
|
|
exit(1)
|
|
options.section_names.append("__apple_ast")
|
|
if options.compare:
|
|
if len(mach_files) == 2:
|
|
mach_a = Mach()
|
|
mach_b = Mach()
|
|
mach_a.parse(mach_files[0])
|
|
mach_b.parse(mach_files[1])
|
|
mach_a.compare(mach_b)
|
|
else:
|
|
print 'error: --compare takes two mach files as arguments'
|
|
else:
|
|
if not (options.dump_header or options.dump_load_commands or options.dump_symtab or options.dump_sections or options.find_mangled or options.section_names):
|
|
options.dump_header = True
|
|
options.dump_load_commands = True
|
|
if options.verbose:
|
|
print 'options', options
|
|
print 'mach_files', mach_files
|
|
for path in mach_files:
|
|
mach = Mach()
|
|
mach.parse(path)
|
|
if options.interactive:
|
|
interpreter = Mach.Interactive(mach, options)
|
|
interpreter.cmdloop()
|
|
else:
|
|
mach.dump(options)
|
|
|