Created
March 29, 2024 16:40
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#!/usr/local/bin/python | |
import sys | |
import struct | |
if len(sys.argv)-1 < 1: | |
print('usage: {} <binary>'.format(sys.argv[0])) | |
sys.exit(1) | |
f = open(sys.argv[1], 'rb') | |
data = f.read() | |
f.close() | |
offset = 0 | |
# FAT header | |
h = struct.unpack_from('<LL', data, offset) | |
offset += 8 | |
if h[0] != 0xcafebabe: | |
print('FAT_MAGIC is wrong') | |
sys.exit(1) | |
print('Number of structs: {}'.format(h[1])) | |
for x in range(0, h[1]): | |
s = struct.unpack_from('<LLLLL', data, offset) | |
offset += 20 | |
print('CPU type 0x{:x} and sub type 0x{:x}'.format(s[0], s[1])) | |
print('Offset {} and size {}'.format(s[2], s[3])) | |
if (s[0] & 0x1000007 == 0x1000007): # CPU_TYPE_X86_64 | |
suffix = 'x64' | |
elif (s[0] & 0x100000C == 0x100000C): # CPU_TYPE_ARM64 | |
suffix = 'arm64' | |
else: | |
suffix = str(s[0]) | |
begining = s[2] | |
end = s[2] + s[3] | |
f = open(sys.argv[1] + '_' + suffix, "wb") | |
f.write(data[begining:end]) | |
f.close() |
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