import sys
import struct
from binascii import *
Central_Directory_File_Count = 0
Central_Directory_File_Header_offset = 0
Local_File_Header_offset_list = []
# End of central directory record
def End_of_central_directory_record(zip_path):
global Central_Directory_File_Header_offset
global Central_Directory_File_Count
end_of_central_directory_record_signature = b'\x50\x4b\x05\x06'
print(f'\n# End of central directory record')
try:
with open(zip_path, 'rb') as f:
file = f.read()
position = file.find(end_of_central_directory_record_signature)
if position == -1:
print(f"End of central directory record Signature can't find.")
return
f.seek(position)
# End of central directory record Signature
signature = f.read(4)
if signature == end_of_central_directory_record_signature:
edit_signature = ' '.join([signature.hex()[i:i+2] for i in range(0, len(signature.hex()), 2)])
print(f'File signature (Magic Number): {edit_signature}')
else:
print(f'End of central directory record Signature is not valid.')
# End of central directory record Disk number
disk_number = f.read(2)
big_endian_disk_number = int.from_bytes(disk_number, byteorder='little')
print(f'Disk Start Number: {big_endian_disk_number}')
# End of central directory record Disk # w/cd
disk_wcd = f.read(2)
big_endian_disk_wcd = int.from_bytes(disk_wcd, byteorder='little')
print(f'Disk # w/cd: {big_endian_disk_wcd}')
# End of central directory record Disk entries
disk_enrties = f.read(2)
big_endian_disk_enrties = int.from_bytes(disk_enrties, byteorder='little')
print(f'Disk Entry: {big_endian_disk_enrties}')
# End of central directory record Total entries
total_entries = f.read(2)
big_endian_total_entries = int.from_bytes(total_entries, byteorder='little')
Central_Directory_File_Count = int(big_endian_total_entries)
print(f'Total Entry: {big_endian_total_entries}')
# End of central directory record Central directory size
directory_size = f.read(4)
big_endian_directory_size = int.from_bytes(directory_size, byteorder='little')
print(f'Size of Central Directory: {big_endian_directory_size}')
# End of central directory record Central Header Offset
central_header_offset = f.read(4)
big_endian_central_header_offset = int.from_bytes(central_header_offset, byteorder='little')
print(f'Central Header Offset: {big_endian_central_header_offset}')
Central_Directory_File_Header_offset = big_endian_central_header_offset
# End of central directory record Comment len
comment_len = f.read(2)
big_endian_comment_len = int.from_bytes(comment_len, byteorder='little')
if big_endian_comment_len == 0:
print(f'Comment Length: None')
else:
print(f'Comment Length: {big_endian_comment_len}')
except FileNotFoundError:
print(f"File {zip_path} can't find.")
# Central Directory File header
def Central_Directory_File_header(zip_path):
global Central_Directory_File_Header_offset
global Central_Directory_File_Header_size
global Local_File_Header
central_directory_file_head_signature = b'\x50\x4b\x01\x02'
print(f'# Central Directory File header\n')
for i in range(Central_Directory_File_Count):
print(f'#{i+1}. Central Directory File header')
try:
with open(zip_path, 'rb') as f:
f.seek(Central_Directory_File_Header_offset)
# Central Directory File header Signature
signature = f.read(4)
if signature == central_directory_file_head_signature:
edit_signature = ' '.join([signature.hex()[i:i+2] for i in range(0, len(signature.hex()), 2)])
print(f'File signature (Magic Number): {edit_signature}')
else:
print(f'Central Directory File header Signature is not valid.')
# Central Directory File header Version
version = f.read(2)
big_endian_version = int.from_bytes(version, byteorder='little')
print(f'Version made by: {big_endian_version}')
# Central Directory File header Versneed
versneed = f.read(2)
big_endian_versneed = int.from_bytes(versneed, byteorder='little')
print(f'Version needed to extract (minimum): {big_endian_versneed}')
# Central Directory File header Flags
flag = f.read(2)
big_endian_flag = int.from_bytes(flag, byteorder='little')
print(f'Flags: {big_endian_flag}')
# Central Directory File header Compression
compression = f.read(2)
big_endian_compression = int.from_bytes(compression, byteorder='little')
print(f'Compression method: {big_endian_compression}')
# Central Directory File header Moditime / Modidate
moditime = f.read(2)
modidate = f.read(2)
big_endian_moditime = int.from_bytes(moditime, byteorder='little')
big_endian_modidate = int.from_bytes(modidate, byteorder='little')
print(f'Moditime/Modidate: {big_endian_moditime}/{big_endian_modidate}')
# Central Directory File header Crc-32
crc32 = f.read(4)
big_endian_crc32 = int.from_bytes(crc32, byteorder='little')
print(f'CRC-32 CheckSum: {big_endian_crc32}')
# Central Directory File header Compressed size / Uncompressed size
compressed_size = f.read(4)
uncompressed_size = f.read(4)
big_endian_compressed_size = int.from_bytes(compressed_size, byteorder='little')
big_endian_uncompressed_size = int.from_bytes(uncompressed_size, byteorder='little')
print(f'Compressed Size/Uncompressed Size: {big_endian_compressed_size}/{big_endian_uncompressed_size}')
# Central Directory File File name len / Extra field len
file_name_len = f.read(2)
extra_field_len = f.read(2)
big_endian_file_name_len = int.from_bytes(file_name_len, byteorder='little')
big_endian_extra_field_len = int.from_bytes(extra_field_len, byteorder='little')
print(f'File Name Length/Extra Field Length: {big_endian_file_name_len}/{big_endian_extra_field_len}')
# Central Directory File header File comment len
comment_len = f.read(2)
big_endian_comment_len = int.from_bytes(comment_len, byteorder='little')
print(f'File Comment Length: {big_endian_comment_len}')
# Central Directory File header Disk start num
disk_start_num = f.read(2)
big_endian_disk_start_num = int.from_bytes(disk_start_num, byteorder='little')
print(f'Disk Start Number: {big_endian_disk_start_num}')
# Central Directory File header Internal attr
internal_attr = f.read(2)
big_endian_internal_attr = int.from_bytes(internal_attr, byteorder='little')
print(f'Internal Attribute: {big_endian_internal_attr}')
# Central Directory File header External attr
external_attr = f.read(4)
big_endian_external_attr = int.from_bytes(external_attr, byteorder='little')
print(f'External Attribute: {big_endian_external_attr}')
# Central Directory File header Local Header Offset
Local_File_Header_offset = f.read(4)
big_endian_Local_File_Header_offset = int.from_bytes(Local_File_Header_offset, byteorder='little')
print(f'Local Header: {big_endian_Local_File_Header_offset}')
# Push Local File Header Offset list
Local_File_Header_offset_list.append(big_endian_Local_File_Header_offset)
# Central Directory File header
file_name = f.read(big_endian_file_name_len)
decode_file_name = file_name.decode('euc-kr', errors='ignore')
print(f'File Name: {decode_file_name}\n')
Central_Directory_File_Header_size = 46 + int(big_endian_file_name_len) + int(big_endian_extra_field_len) + int(big_endian_comment_len)
Central_Directory_File_Header_offset = Central_Directory_File_Header_offset + Central_Directory_File_Header_size
except FileNotFoundError:
print(f"File {zip_path} can't find.")
# Local File Header
def Local_File_Header(zip_path):
global Local_File_Header
global Local_File_Header_offset_list
local_file_header_signature = b'\x50\x4b\x03\x04'
print(f'# Local File Header\n')
for i in range(len(Local_File_Header_offset_list)):
print(f'#{i+1}. Local File Header')
try:
with open(zip_path, 'rb') as f:
# Local File Header Signature
f.seek(Local_File_Header_offset_list[i])
signature = f.read(4)
if signature == local_file_header_signature:
edit_signature = ' '.join([signature.hex()[i:i+2] for i in range(0, len(signature.hex()), 2)])
print(f'File signature (Magic Number): {edit_signature}')
else:
print(f'Local File Header Signature is not valid.')
#Local File Header Version
version = f.read(2)
big_endian_version = int.from_bytes(version, byteorder='little')
print(f'Version needed to extract: {big_endian_version}')
#Local File Header Flags
flag = f.read(2)
big_endian_flag = int.from_bytes(flag, byteorder='little')
print(f'Flags: {big_endian_flag}')
# Local File Header Compression
compression = f.read(2)
big_endian_compression = int.from_bytes(compression, byteorder='little')
print(f'Compression method: {big_endian_compression}')
# Local File Header Moditime / Modidate
moditime = f.read(2)
modidate = f.read(2)
big_endian_moditime = int.from_bytes(moditime, byteorder='little')
big_endian_modidate = int.from_bytes(modidate, byteorder='little')
print(f'Moditime/Modidate: {big_endian_moditime}/{big_endian_modidate}')
# Local File Header Crc-32
crc32 = f.read(4)
big_endian_crc32 = int.from_bytes(crc32, byteorder='little')
print(f'CRC-32 CheckSum: {big_endian_crc32}')
# Local File Header Compressed size / Uncompressed size
compressed_size = f.read(4)
uncompressed_size = f.read(4)
big_endian_compressed_size = int.from_bytes(compressed_size, byteorder='little')
big_endian_uncompressed_size = int.from_bytes(uncompressed_size, byteorder='little')
print(f'Compressed Size/Uncompressed Size: {big_endian_compressed_size}/{big_endian_uncompressed_size}')
# Local File Header File name len / Extra field len
file_name_len = f.read(2)
extra_field_len = f.read(2)
big_endian_file_name_len = int.from_bytes(file_name_len, byteorder='little')
big_endian_extra_field_len = int.from_bytes(extra_field_len, byteorder='little')
print(f'File Name Length/Extra Field Length: {big_endian_file_name_len}/{big_endian_extra_field_len}')
# Local File Header File name
file_name = f.read(big_endian_file_name_len)
decode_file_name = file_name.decode('euc-kr', errors='ignore')
print(f'File Name: {decode_file_name}\n')
except FileNotFoundError:
print(f"File {zip_path} can't find.")
if __name__=='__main__':
# usage
if len(sys.argv) != 2:
print("usage : python ./zip_parse.py ./zip_path")
sys.exit()
# zip path
zip_path = sys.argv[1]
End_of_central_directory_record(zip_path)
print('')
print(f'----------------------------------------------------------')
print('')
Central_Directory_File_header(zip_path)
print('')
print(f'----------------------------------------------------------')
print('')
Local_File_Header(zip_path)
Let it rip!