fileformat.md

File formats

All the information below was resolved by myself using a hex editor and debugger. Therefore, the correctness is not guaranteed.

CBF File format

header with size 52 bytes (0x34)

Size	Name	Note
4 bytes	signature	0x46474942 - "BIGF" Big File format
4 bytes	signature2	0x4C425A01 - LSB = isEncrypted/compressed
4 bytes	fileSize	the size of CBF file, in bytes
4 bytes	unk	-
4 bytes	CountOfFiles	the count of files, packed in CBF
4 bytes	TableOfFilesOffset	the position of ToF, in bytes, from the start of file
4 bytes	unk	-
4 bytes	sizeOf(TableOfFiles)	-

The table of files structure

The size of a row is flexible and depends on the length of filename. Use the size of row members to move through the table.

Each row in table

Size	Name	Note
2 bytes	size of a row	Note: each row contains a file name
4 bytes	start offset	-
0x10	isCompressedWithLZW	-
0x14	size of file (first byte = key)	-
0x20	state (1 - LZW compressed, 0 - uncompressed)	-
0x2A	offset a NULL-terminated filename	-

LZW file

header with size 12 bytes (0xC)

Size	Name	Note
4 bytes	magic number	0x5D2E2E5B
4 bytes	size - input	-
4 bytes	size - ouput	-