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Phoenix TDK Packer Extractor v2.0_a6

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Dramatically increase TDK Packer base offset detection speed

Applied regex pattern improvements
This commit is contained in:
platomav 2022-05-24 14:36:46 +03:00
parent 8b561640db
commit aea54aeaad
3 changed files with 29 additions and 15 deletions
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17
Portwell_EFI_Extract.py
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@ -7,7 +7,7 @@ Portwell EFI Update Extractor
Copyright (C) 2021-2022 Plato Mavropoulos
"""
TITLE = 'Portwell EFI Update Extractor v2.0_a6'
TITLE = 'Portwell EFI Update Extractor v2.0_a7'
import os
import sys
@ -37,8 +37,8 @@ def is_portwell_efi(in_file):
try: pe_buffer = get_portwell_pe(in_buffer)[1]
except: pe_buffer = b''
is_mz = in_buffer.startswith(PAT_MICROSOFT_MZ.pattern) # EFI images start with PE Header MZ
is_uu = pe_buffer.startswith(PAT_PORTWELL_EFI.pattern) # Portwell EFI files start with <UU>
is_mz = PAT_MICROSOFT_MZ.search(in_buffer[:0x2]) # EFI images start with PE Header MZ
is_uu = PAT_PORTWELL_EFI.search(pe_buffer[:0x4]) # Portwell EFI files start with <UU>
return is_mz and is_uu
@ -52,6 +52,8 @@ def get_portwell_pe(in_buffer):
# Parse & Extract Portwell UEFI Unpacker
def portwell_efi_extract(input_buffer, output_path, padding=0):
efi_files = [] # Initialize EFI Payload file chunks
extract_path = os.path.join(f'{output_path}_extracted')
make_dirs(extract_path, delete=True)
@ -62,9 +64,14 @@ def portwell_efi_extract(input_buffer, output_path, padding=0):
printer(efi_title, padding)
efi_files = pe_data.split(PAT_PORTWELL_EFI.pattern) # Split EFI Payload into <UU> file chunks
# Split EFI Payload into <UU> file chunks
efi_list = list(PAT_PORTWELL_EFI.finditer(pe_data))
for i,_ in enumerate(efi_list):
efi_bgn = efi_list[i].end()
efi_end = len(pe_data) if i == len(efi_list) - 1 else efi_list[i + 1].start()
efi_files.append(pe_data[efi_bgn:efi_end])
parse_efi_files(extract_path, efi_files[1:], padding)
parse_efi_files(extract_path, efi_files, padding)
# Get Portwell UEFI Unpacker tag
def get_unpacker_tag(input_buffer, pe_file):