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Apple EFI IM4P Splitter v1.2

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Fixed IM4P payload start offset
This commit is contained in:
Plato Mavropoulos 2018-11-01 15:24:13 +02:00
parent d702d7f8a8
commit 2bcd917314
1 changed files with 8 additions and 6 deletions
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14
Apple EFI IM4P Splitter/Apple_EFI_Split.py
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@ -6,7 +6,7 @@ Apple EFI IM4P Splitter
Copyright (C) 2018 Plato Mavropoulos
"""
print('Apple EFI IM4P Splitter v1.1\n')
print('Apple EFI IM4P Splitter v1.2')
import os
import re
@ -33,9 +33,11 @@ for input_file in apple_im4p :
file_dir = os.path.dirname(file_path)
file_ext = os.path.splitext(file_path)[1]
print('\nFile: %s%s' % (file_name, file_ext))
# Must be IM4P file because its size is 0x0 dependent
if file_ext not in ('.im4p','.IM4P') :
print('Error: Could not find IM4P file extension at %s!\n' % file_name)
print('\n Error: Could not find IM4P file extension at %s!' % file_name)
continue
with open(input_file, 'rb') as in_file : buffer = in_file.read()
@ -43,17 +45,17 @@ for input_file in apple_im4p :
is_im4p = im4p.search(buffer) # Detect IM4P pattern
if not is_im4p :
print('Error: Could not find IM4P pattern at %s!\n' % file_name)
print('\n Error: Could not find IM4P pattern at %s!' % file_name)
continue
im4p_size = int.from_bytes(buffer[2:is_im4p.start()], 'big') # Variable, from 0x2 - IM4P
im4p_type = buffer[is_im4p.end():is_im4p.end() + 0x4].decode('utf-8') # mefi
if im4p_type != 'mefi' :
print('Error: Could not find "mefi" IM4P Type at %s!\n' % file_name)
print('\n Error: Could not find "mefi" IM4P Type at %s!' % file_name)
continue
payload_start = is_im4p.start() + 0x15
payload_start = is_im4p.start() + buffer[is_im4p.start() - 0x1]
payload_size = int.from_bytes(buffer[is_im4p.end() + 0x9:is_im4p.end() + 0xD], 'big')
ifd_count = list(ifd.finditer(buffer)) # Count the Intel FD(s) to determine each SPI size and offset
@ -71,4 +73,4 @@ for input_file in apple_im4p :
spi_start += spi_size
input('Done!')
input('\nDone!')