mirror of
https://github.com/Virtual-World-RE/NeoGF.git
synced 2024-11-15 12:45:34 +01:00
Update gcmtool.py
now patch dol & fst in the iso using files in sys folder
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tmpz23
GitHub
parent
d547bdca97
commit
712c5ea84d
120
gcmtool.py
120
gcmtool.py
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@ -3,7 +3,7 @@ from pathlib import Path
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import logging
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__version__ = "0.0.4"
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__version__ = "0.0.5"
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__author__ = "rigodron, algoflash, GGLinnk"
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__license__ = "MIT"
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__status__ = "developpement"
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@ -12,9 +12,15 @@ __status__ = "developpement"
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DVD_MAGIC = b"\xC2\x33\x9F\x3D"
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FST_TYPE_FILE = 0
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FST_TYPE_DIR = 1
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MIN_FILEOFFSET_ENDDOL = "ENDDOL"
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MIN_FILEOFFSET_FSTOFFSET = "FSTOFFSET"
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BOOTBIN_LEN = 0x440
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BOOTBIN_DOLOFFSET_OFFSET = 0x420
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BOOTBIN_FSTOFFSET_OFFSET = 0x424
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BOOTBIN_FSTLEN_OFFSET = 0x428
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BI2BIN_LEN = 0x2000
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DOL_HEADER_LEN = 0x100
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ISO_APPLOADER_OFFSET = 0x2440
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ISO_APPLOADERSIZE_OFFSET = 0x2454
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######################################################################
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# Todo : add extension check ; add --disable-ignore
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# -> test it on random iso and check that it's the same than dolphin extract
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@ -87,16 +93,14 @@ class FstTree:
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__fst_block = None
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__name_block = None
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__nameblock_length = None # Used to find min file_offset when fst is at the end of the iso beginning
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__min_file_offset_type = None
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def __init__(self, root_path:Path, min_file_offset:tuple, align:int = 4):
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def __init__(self, root_path:Path, fst_offset:int, align:int = 4):
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self.__root_path_length = len(root_path.parts)
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self.__root_node = Folder(root_path.name, None)
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self.__align = align
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self.__name_block = b""
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self.__fst_block = b""
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self.__min_file_offset_type = min_file_offset[0]
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self.__nameblock_length = 0
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self.__current_file_offset = min_file_offset[1]
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self.__current_file_offset = fst_offset
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def __str__(self):
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return self.__to_str(self.__root_node)
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def __to_str(self, node:Node, depth=0):
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@ -105,12 +109,13 @@ class FstTree:
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for child in node.childs():
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result += self.__to_str(child, depth+1)
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return result
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# Needed to know where we can begin to write files
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def __get_fst_length(self):
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self.__generate_nameblock_length()
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min_fileoffset = self.count_childs(self.__root_node)*12 + 12 + self.__nameblock_length
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if min_fileoffset % self.__align != 0:
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min_fileoffset += self.__align - (min_fileoffset % self.__align)
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return min_fileoffset
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fst_len = self.__count_childs(self.__root_node)*12 + 12 + self.__nameblock_length
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if fst_len % self.__align != 0:
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fst_len += self.__align - (fst_len % self.__align)
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return fst_len
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def __generate_nameblock_length(self, node:Node = None):
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if node == None:
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node = self.__root_node
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@ -130,7 +135,7 @@ class FstTree:
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else:
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node = Folder(node_path.name, parent)
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parent.add_child(node)
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def prepare(self, node:Node = None):
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def __prepare(self, node:Node = None):
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offset_name = 0
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if node == None:
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node = self.__root_node
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@ -142,13 +147,13 @@ class FstTree:
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self.__current_index += 1
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if node.type() == FST_TYPE_DIR:
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node.set_next_dir(self.__current_index + self.count_childs(node))
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node.set_next_dir(self.__current_index + self.__count_childs(node))
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if node == self.__root_node:
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self.__fst_block = b"\x01\x00\x00\x00\x00\x00\x00\x00" + node.next_dir().to_bytes(4, "big")
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else:
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self.__fst_block += node.format()
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for child in node.childs():
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self.prepare(child)
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self.__prepare(child)
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else:
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node.set_offset(self.__current_file_offset)
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self.__fst_block += node.format()
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@ -156,22 +161,21 @@ class FstTree:
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if self.__align != 0 and self.__current_file_offset % self.__align != 0:
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self.__current_file_offset += self.__align - (self.__current_file_offset % self.__align)
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def get_fst(self):
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if self.__min_file_offset_type == MIN_FILEOFFSET_FSTOFFSET:
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self.__current_file_offset += self.__get_fst_length()
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self.prepare()
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self.__prepare()
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return self.__fst_block + self.__name_block
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def count_childs(self, node:Folder):
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def __count_childs(self, node:Folder):
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count = 0
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for child in node.childs():
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if child.type() == FST_TYPE_DIR:
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count += self.count_childs(child)
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count += self.__count_childs(child)
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return count + len(node.childs())
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class Dol:
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# Get total length using the sum of the 18 sections length and dol header length (0x100)
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def getDolLen(self, dolheader_data:bytes):
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dol_len = 0x100
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# Get total length using the sum of the 18 sections length and dol header length
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def get_dol_len(self, dolheader_data:bytes):
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dol_len = DOL_HEADER_LEN
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for i in range(18):
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dol_len += int.from_bytes(dolheader_data[0x90+i*4:0x90+(i+1)*4], "big", signed=False)
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return dol_len
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@ -179,47 +183,36 @@ class Dol:
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# https://sudonull.com/post/68549-Gamecube-file-system-device
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class GCM:
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def __get_min_file_offset(self, sys_path:Path):
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bootbin_path = sys_path / "boot.bin"
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with bootbin_path.open("rb") as bootbin_file:
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# We find offset of fst.bin
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bootbin_file.seek(0x420)
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dol_end = int.from_bytes(bootbin_file.read(4),"big", signed=False) + (sys_path / "boot.dol").stat().st_size
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fst_offset = int.from_bytes(bootbin_file.read(4), "big", signed=False)
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if dol_end > fst_offset:
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logging.warning("boot.dol is after fst.bin ! This mean that boot.bin has to be patched if fst erase the beginning of the dol.")
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return (MIN_FILEOFFSET_ENDDOL, dol_end)
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return (MIN_FILEOFFSET_FSTOFFSET, fst_offset)
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def unpack(self, iso_path:Path, folder_path:Path):
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with iso_path.open("rb") as iso_file:
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bootbin_data = iso_file.read(0x440)
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bootbin_data = iso_file.read(BOOTBIN_LEN)
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if bootbin_data[0x1c:0x20] != DVD_MAGIC:
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raise Exception("Invalid DVD format - this tool is for ISO/GCM files")
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bi2bin_data = iso_file.read(0x2000)
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bi2bin_data = iso_file.read(BI2BIN_LEN)
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# https://www.gc-forever.com/wiki/index.php?title=Apploader
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# -> Full apploader size is sum of size and trailerSize, rounded up to 32 bytes.
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iso_file.seek(0x2454)
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iso_file.seek(ISO_APPLOADERSIZE_OFFSET)
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size = int.from_bytes(iso_file.read(4), "big", signed=False)
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trailerSize = int.from_bytes(iso_file.read(4), "big", signed=False)
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# Dolphin Emulator add 32 Null bytes at the end of the extracted apploader.img
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apploader_size = size + trailerSize + 32
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iso_file.seek(0x2440)
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iso_file.seek(ISO_APPLOADER_OFFSET)
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apploaderimg_data = iso_file.read(apploader_size)
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fstbin_offset = int.from_bytes(bootbin_data[0x424:0x428],"big", signed=False)
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fstbin_len = int.from_bytes(bootbin_data[0x428:0x42c],"big", signed=False)
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fstbin_offset = int.from_bytes(bootbin_data[BOOTBIN_FSTOFFSET_OFFSET:BOOTBIN_FSTOFFSET_OFFSET+4],"big", signed=False)
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fstbin_len = int.from_bytes(bootbin_data[BOOTBIN_FSTLEN_OFFSET:BOOTBIN_FSTLEN_OFFSET+4],"big", signed=False)
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iso_file.seek( fstbin_offset )
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fstbin_data = iso_file.read( fstbin_len )
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dol_offset = int.from_bytes(bootbin_data[0x420:0x424],"big", signed=False)
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dol_offset = int.from_bytes(bootbin_data[BOOTBIN_DOLOFFSET_OFFSET:BOOTBIN_DOLOFFSET_OFFSET+4],"big", signed=False)
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iso_file.seek( dol_offset )
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dol = Dol()
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dolheader_data = iso_file.read(0x100)
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dol_len = dol.getDolLen( dolheader_data )
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bootdol_data = dolheader_data + iso_file.read( dol_len - 0x100 )
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dolheader_data = iso_file.read(DOL_HEADER_LEN)
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dol_len = dol.get_dol_len( dolheader_data )
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bootdol_data = dolheader_data + iso_file.read( dol_len - DOL_HEADER_LEN )
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if folder_path != Path("."):
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base_path = folder_path
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else:
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@ -234,11 +227,11 @@ class GCM:
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(sys_path / "fst.bin").open("wb") as fstbin_file, \
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(sys_path / "apploader.img").open("wb") as apploaderimg_file,\
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(sys_path / "boot.dol").open("wb") as bootdol_file:
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logging.debug(f"{iso_path}(0x0:0x440) -> {sys_path / 'boot.bin'}")
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logging.debug(f"{iso_path}(0x0:0x{BOOTBIN_LEN:x}) -> {sys_path / 'boot.bin'}")
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bootbin_file.write(bootbin_data)
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logging.debug(f"{iso_path}(0x440:0x2440) -> {sys_path / 'bi2.bin'}")
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logging.debug(f"{iso_path}(0x440:0x{ISO_APPLOADER_OFFSET:x}) -> {sys_path / 'bi2.bin'}")
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bi2bin_file.write(bi2bin_data)
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logging.debug(f"{iso_path}(0x2440:0x{0x2440 + apploader_size:x} -> {sys_path / 'apploader.img'}")
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logging.debug(f"{iso_path}(0x{ISO_APPLOADER_OFFSET:x}:0x{ISO_APPLOADER_OFFSET + apploader_size:x} -> {sys_path / 'apploader.img'}")
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apploaderimg_file.write(apploaderimg_data)
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logging.debug(f"{iso_path}(0x{fstbin_offset:x}:0x{fstbin_offset + fstbin_len:x}) -> {sys_path / 'fst.bin'}")
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fstbin_file.write(fstbin_data)
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@ -294,25 +287,25 @@ class GCM:
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(folder_path / "sys" / "apploader.img").open("rb") as apploaderimg_file,\
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(folder_path / "sys" / "boot.dol").open("rb") as bootdol_file :
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logging.debug(f"{folder_path / 'sys' / 'boot.bin'} -> {iso_path}(0x0:0x440)")
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logging.debug(f"{folder_path / 'sys' / 'bi2.bin'} -> {iso_path}(0x440:0x2440)")
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logging.debug(f"{folder_path / 'sys' / 'apploader.img'} -> {iso_path}(0x2440:0x{0x2440 + (folder_path / 'sys' / 'apploader.img').stat().st_size:x}")
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logging.debug(f"{folder_path / 'sys' / 'boot.bin'} -> {iso_path}(0x0:0x{BOOTBIN_LEN:x})")
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logging.debug(f"{folder_path / 'sys' / 'bi2.bin'} -> {iso_path}(0x{BOOTBIN_LEN:x}:0x{ISO_APPLOADER_OFFSET:x})")
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logging.debug(f"{folder_path / 'sys' / 'apploader.img'} -> {iso_path}(0x{ISO_APPLOADER_OFFSET:x}:0x{ISO_APPLOADER_OFFSET + (folder_path / 'sys' / 'apploader.img').stat().st_size:x}")
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bootbin_data = bootbin_file.read()
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iso_file.write( bootbin_data )
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iso_file.write(bi2bin_file.read())
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iso_file.write(apploaderimg_file.read())
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fstbin_offset = int.from_bytes(bootbin_data[0x424:0x428],"big", signed=False)
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fstbin_len = int.from_bytes(bootbin_data[0x428:0x42c],"big", signed=False)
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fstbin_offset = int.from_bytes(bootbin_data[BOOTBIN_FSTOFFSET_OFFSET:BOOTBIN_FSTOFFSET_OFFSET+4],"big", signed=False)
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fstbin_len = int.from_bytes(bootbin_data[BOOTBIN_FSTLEN_OFFSET:BOOTBIN_FSTLEN_OFFSET+4],"big", signed=False)
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if (folder_path / "sys" / "fst.bin").stat().st_size != fstbin_len:
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raise Exception("Invalid fst.bin size in boot.bin offset 0x428:0x42c!")
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raise Exception("Invalid fst.bin size in boot.bin offset 0x{BOOTBIN_FSTLEN_OFFSET:x}:0x{BOOTBIN_FSTLEN_OFFSET+4:x}!")
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logging.debug(f"{folder_path / 'sys' / 'fst.bin'} -> {iso_path}(0x{fstbin_offset:x}:0x{fstbin_offset + fstbin_len:x})")
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iso_file.seek( fstbin_offset )
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fstbin_data = fstbin_file.read()
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iso_file.write( fstbin_data )
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dol_offset = int.from_bytes(bootbin_data[0x420:0x424],"big", signed=False)
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dol_offset = int.from_bytes(bootbin_data[BOOTBIN_DOLOFFSET_OFFSET:BOOTBIN_DOLOFFSET_OFFSET+4],"big", signed=False)
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logging.debug(f"{folder_path / 'sys' / 'boot.dol'} -> {iso_path}(0x{dol_offset:x}:0x{dol_offset + (folder_path / 'sys' / 'boot.dol').stat().st_size:x})")
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iso_file.seek( dol_offset )
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iso_file.write( bootdol_file.read() )
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@ -358,8 +351,24 @@ class GCM:
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def rebuild_fst(self, folder_path:Path, align:int):
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root_path = folder_path / "root"
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sys_path = folder_path / "sys"
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fst_tree = FstTree(root_path, self.__get_min_file_offset(sys_path), align=align)
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with (sys_path / "boot.bin").open("rb+") as bootbin_file:
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dol_offset = ISO_APPLOADER_OFFSET + (sys_path / "apploader.img").stat().st_size
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if dol_offset % align != 0:
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dol_offset += align - (dol_offset % align)
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logging.info(f"Patching sys/boot.bin offset 0x{BOOTBIN_DOLOFFSET_OFFSET:x} with new dol offset (0x{dol_offset:x})")
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bootbin_file.seek(BOOTBIN_DOLOFFSET_OFFSET)
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bootbin_file.write(dol_offset.to_bytes(4, "big"))
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fst_offset = dol_offset + (sys_path / "boot.dol").stat().st_size
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if fst_offset % align != 0:
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fst_offset += align - (fst_offset % align)
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logging.info(f"Patching sys/boot.bin offset 0x{BOOTBIN_FSTOFFSET_OFFSET:x} with new fst offset (0x{fst_offset:x})")
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bootbin_file.seek(BOOTBIN_FSTOFFSET_OFFSET)
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bootbin_file.write(fst_offset.to_bytes(4, "big"))
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fst_tree = FstTree(root_path, fst_offset, align=align)
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# Sorting paths approach original fst sort but specials chars are after and not before chars
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path_list = sorted([path for path in root_path.glob('**/*')], key=lambda s:Path(str(s).upper()))
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for path in path_list:
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fst_tree.add_node_by_path(path)
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@ -368,10 +377,9 @@ class GCM:
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with fst_path.open("wb") as fstbin_file:
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logging.info("Writing fst in sys/fst.bin")
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fstbin_file.write( fst_tree.get_fst() )
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with (folder_path / "sys" / "boot.bin").open("rb+") as bootbin_file:
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fst_size = fst_path.stat().st_size
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logging.info(f"Patching sys/boot.bin offset 0x428 with new fst size ({fst_size})")
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bootbin_file.seek(0x428)
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logging.info(f"Patching sys/boot.bin offset 0x{BOOTBIN_FSTLEN_OFFSET:x} with new fst size (0x{fst_size:x})")
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bootbin_file.seek(BOOTBIN_FSTLEN_OFFSET)
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bootbin_file.write(fst_size.to_bytes(4, "big"))
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