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https://github.com/Virtual-World-RE/NeoGF.git
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Create afstool.py
First version. Not tested yet it's work in progress
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tmpz23
GitHub
parent
06b1c75b08
commit
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208
afstool.py
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208
afstool.py
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#!/usr/bin/env python3
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from datetime import datetime
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from pathlib import Path
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import logging
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import os
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import time
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__version__ = "0.0.1"
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__author__ = "rigodron, algoflash, GGLinnk"
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__license__ = "MIT"
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__status__ = "developpement"
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# http://wiki.xentax.com/index.php/GRAF:AFS_AFS
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class Afs:
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MAGIC = b"AFS\x00"
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ALIGN = 0x800
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HEADER_LEN = 8
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FILENAMEBLOCK_ENTRY_LEN = 0x30
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__len = None
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__file_number = None
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__filenameblock_offset_offset = None
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__filenameblock_offset = None
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__filenameblock_len = None
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__filenameblock = None
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__tableofcontent = None
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def unpack(self, afs_path:Path, folder_path:Path):
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sys_path = folder_path / "sys"
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root_path = folder_path / "root"
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sys_path.mkdir(parents=True, exist_ok=True)
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root_path.mkdir(exist_ok=True)
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self.__len = afs_path.stat().st_size
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with afs_path.open("rb") as afs_file:
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self.__tableofcontent = afs_file.read(Afs.HEADER_LEN)
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if self.__get_magic() != Afs.MAGIC:
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raise Exception("Invalid AFS magic number")
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self.__file_number = int.from_bytes(self.__tableofcontent[4:8], "little")
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self.__tableofcontent += afs_file.read(self.__file_number*8)
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(self.__filenameblock_offset_offset, self.__filenameblock_offset) = self.__get_next_uint32(afs_file, Afs.HEADER_LEN+self.__file_number*8)
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afs_file.seek(self.__filenameblock_offset_offset+4)
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self.__filenameblock_len = int.from_bytes(afs_file.read(4), "little")
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if not self.__load_filenameblock(afs_file):
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logging.info("There is no filename block. Creating new names and dates for files.")
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else:
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logging.debug(f"Filenameblock offset:0x{self.__filenameblock_offset:x}, filenameblock len:0x{self.__filenameblock_len}.")
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afs_file.seek(len(self.__tableofcontent))
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self.__tableofcontent += afs_file.read(self.__filenameblock_offset_offset+8 - len(self.__tableofcontent))
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with (sys_path / "filenameblock.bin").open("wb") as filenameblock_file:
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logging.info("Writting sys/filenameblock.bin")
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filenameblock_file.write(self.__filenameblock)
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with (sys_path / "tableofcontent.bin").open("wb") as tableofcontent_file:
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logging.info("Writting sys/tableofcontent.bin")
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tableofcontent_file.write(self.__tableofcontent)
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self.__extract_files(root_path, afs_file)
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def pack(self, folder_path:Path, afs_path:Path = None):
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if afs_path == None:
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afs_path = folder_path / Path(folder_path.name).with_suffix(".afs")
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sys_path = folder_path / "sys"
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root_path = folder_path / "root"
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with afs_path.open("wb") as afs_file, (sys_path / "tableofcontent.bin").open("rb") as tableofcontent_file:
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logging.debug(f"Writting {sys_path}/tableofcontent.bin in AFS.")
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self.__tableofcontent = tableofcontent_file.read()
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self.__file_number = int.from_bytes(self.__tableofcontent[4:8], "little")
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afs_file.write(self.__pad(self.__tableofcontent))
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if (sys_path / "filenameblock.bin").is_file():
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(self.__filenameblock_offset_offset, self.__filenameblock_offset) = self.__get_next_uint32(tableofcontent_file, Afs.HEADER_LEN+self.__file_number*8, (sys_path / "tableofcontent.bin").stat().st_size)
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self.__filenameblock_len = int.from_bytes(self.__tableofcontent[self.__filenameblock_offset_offset+4:self.__filenameblock_offset_offset+8], "little")
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with (sys_path / "filenameblock.bin").open("rb") as filenameblock_file:
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self.__filenameblock = filenameblock_file.read()
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for i in range(0, self.__file_number):
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file_offset = int.from_bytes(self.__tableofcontent[Afs.HEADER_LEN+i*8:Afs.HEADER_LEN+i*8+4], "little")
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file_len = int.from_bytes(self.__tableofcontent[Afs.HEADER_LEN+i*8+4:Afs.HEADER_LEN+i*8+8], "little")
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if self.__filenameblock != None :
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filename = self.__filenameblock[i*Afs.FILENAMEBLOCK_ENTRY_LEN:i*Afs.FILENAMEBLOCK_ENTRY_LEN+32].split(b"\x00")[0].decode("utf-8")
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else:
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filename = f"unknown_{i}.bin"
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with (root_path / filename).open("rb") as new_file:
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logging.debug(f"Packing {root_path/filename} 0x{file_offset:x}:0x{file_offset+file_len:x} in iso.")
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afs_file.seek(file_offset)
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afs_file.write(self.__pad(new_file.read()))
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afs_file.write(self.__pad(self.__filenameblock))
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def rebuild(self, folder_path:Path):
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raise Exception("Not implemented yet")
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def list(self, path:Path):
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raise Exception("Not implemented yet")
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if path.is_file():
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self.__list_afs(path)
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else:
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self.__list_afsdir(path)
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def __pad(self, data:bytes):
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if len(data) % self.ALIGN != 0:
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data += b"\x00" * (self.ALIGN - (len(data) % self.ALIGN))
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return data
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def __extract_files(self, root_path:Path, afs_file):
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logging.info(f"Extracting {self.__file_number} files.")
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for i in range(0, self.__file_number):
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file_offset = int.from_bytes(self.__tableofcontent[Afs.HEADER_LEN+i*8:Afs.HEADER_LEN+i*8+4], "little")
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file_len = int.from_bytes(self.__tableofcontent[Afs.HEADER_LEN+i*8+4:Afs.HEADER_LEN+i*8+8], "little")
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if self.__filenameblock != None :
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filename = self.__filenameblock[i*Afs.FILENAMEBLOCK_ENTRY_LEN:i*Afs.FILENAMEBLOCK_ENTRY_LEN+32].split(b"\x00")[0].decode("utf-8")
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year = int.from_bytes(self.__filenameblock[i*Afs.FILENAMEBLOCK_ENTRY_LEN+32:i*Afs.FILENAMEBLOCK_ENTRY_LEN+34], "little")
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month = int.from_bytes(self.__filenameblock[i*Afs.FILENAMEBLOCK_ENTRY_LEN+34:i*Afs.FILENAMEBLOCK_ENTRY_LEN+36], "little")
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day = int.from_bytes(self.__filenameblock[i*Afs.FILENAMEBLOCK_ENTRY_LEN+36:i*Afs.FILENAMEBLOCK_ENTRY_LEN+38], "little")
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hour = int.from_bytes(self.__filenameblock[i*Afs.FILENAMEBLOCK_ENTRY_LEN+38:i*Afs.FILENAMEBLOCK_ENTRY_LEN+40], "little")
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minute = int.from_bytes(self.__filenameblock[i*Afs.FILENAMEBLOCK_ENTRY_LEN+40:i*Afs.FILENAMEBLOCK_ENTRY_LEN+42], "little")
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second = int.from_bytes(self.__filenameblock[i*Afs.FILENAMEBLOCK_ENTRY_LEN+42:i*Afs.FILENAMEBLOCK_ENTRY_LEN+44], "little")
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mtime = time.mktime(datetime(year=year, month=month, day=day, hour=hour, minute=minute, second=second).timetuple())
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else:
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filename = f"unknown_{i}.bin"
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with (root_path / filename).open("wb") as new_file:
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logging.debug(f"Writting {root_path/filename} 0x{file_offset:x}:0x{file_offset+file_len:x}")
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afs_file.seek(file_offset)
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new_file.write(afs_file.read(file_len))
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if self.__filenameblock != None :
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os.utime(root_path/filename, (mtime, mtime))
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def __load_filenameblock(self, afs_file):
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if self.__filenameblock_offset + self.__filenameblock_len > self.__len or self.__filenameblock_offset < self.__filenameblock_offset_offset:
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self.__clean_filenameblock()
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return False
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afs_file.seek(self.__filenameblock_offset)
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self.__filenameblock = afs_file.read(self.__filenameblock_len)
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if (len(self.__tableofcontent) - self.HEADER_LEN) / 8 != self.__filenameblock_len / Afs.FILENAMEBLOCK_ENTRY_LEN:
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self.__clean_filenameblock()
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return False
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for i in range(0, len(self.__tableofcontent)):
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if self.__tableofcontent[Afs.HEADER_LEN+i*8+4:Afs.HEADER_LEN+i*8+8] != self.__filenameblock[i*Afs.FILENAMEBLOCK_ENTRY_LEN+44:i*Afs.FILENAMEBLOCK_ENTRY_LEN+48]:
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self.__clean_filenameblock()
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return False
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return True
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def __clean_filenameblock(self):
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self.__filenameblock = None
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self.__filenameblock_offset = None
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self.__filenameblock_len = None
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def __get_magic(self):
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return self.__tableofcontent[0:4]
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# return a tuple with (offset:int, value:int)
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def __get_next_uint32(self, file, offset:int, file_len=None):
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if file_len == None:
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file_len = self.__len
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file.seek(offset)
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next_uint32 = int.from_bytes(file.read(4), "little")
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offset += 4
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if next_uint32 != 0:
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return (offset, next_uint32)
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# If filename_block_offset is not directly after the files offsets and lens
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# --> we search the next uint32 != 0
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while offset < file_len:
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max_size = 0x800
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if offset + max_size > file_len:
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max_size = file_len - offset
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tmp_block = file.read(max_size)
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for i in range(0, max_size, 4):
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next_uint32 = int.from_bytes(tmp_block[i:i+4], "little")
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if next_uint32 != 0:
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return (offset+i, next_uint32)
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offset += max_size
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raise Exception("Empty AFS file.")
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def __list_afs(self, afs_path:Path):
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pass
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def __list_afsdir(self, root_dir:Path):
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pass
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def get_argparser():
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import argparse
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parser = argparse.ArgumentParser(description='AFS packer & unpacker - [GameCube] v' + __version__)
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parser.add_argument('--version', action='version', version='%(prog)s ' + __version__)
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parser.add_argument('-v', '--verbose', action='store_true', help='verbose mode')
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parser.add_argument('input_path', metavar='INPUT', help='')
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parser.add_argument('output_path', metavar='OUTPUT', help='', nargs='?', default="")
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group = parser.add_mutually_exclusive_group(required=True)
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group.add_argument('-p', '--pack', action='store_true', help="-p source_folder (dest_file.afs) : Pack source_folder in new file source_folder.afs or dest_file.afs if specified")
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group.add_argument('-u', '--unpack', action='store_true', help="-u source_afs.afs (dest_folder) : Unpack the AFS in new folder source_afs or dest_folder if specified")
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group.add_argument('-l', '--list', action='store_true', help="-l source_afs.afs or source_folder : List AFS files, length and offsets")
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group.add_argument('-r', '--rebuild', help="-r source_folder fndo_offset : Rebuild AFS tableofcontent and filenamedirectory using fndo_offset as filenamedirectory_offset_offset (the offset in the TOC)")
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return parser
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if __name__ == '__main__':
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logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.INFO)
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args = get_argparser().parse_args()
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p_input = Path(args.input_path)
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p_output = Path(args.output_path)
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afs = Afs()
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if args.verbose:
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logging.getLogger().setLevel(logging.DEBUG)
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if args.pack:
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logging.info("### Pack in new AFS")
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if(p_output == Path(".")):
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p_output = Path(p_input.with_suffix(".afs"))
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logging.info(f"packing folder {p_input} in {p_output}")
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afs.pack( p_input, p_output )
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elif args.unpack:
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logging.info("### Unpack AFS in new folder")
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if p_output == Path("."):
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p_output = p_input.parent / p_input.stem
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logging.info(f"unpacking AFS {p_input} in {p_output}")
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afs.unpack( p_input, p_output )
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elif args.list:
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afs.list(p_input)
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