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44 lines
2.4 KiB
Plaintext
44 lines
2.4 KiB
Plaintext
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#### INDEX FILE RESEARCH #### By Ioncannon
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Current research on SqPack Index files
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===SQPACK HEADER=== (0x400 in size)
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0x000: Signature Int32; "SqPack", followed by 0's (12 bytes)
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0x00c: Header Length Int32;
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0x010: ~~Unknown~~ Int32; Unknown but repeated in other header
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0x014: SqPack Type Int32; Type 0: SQDB, Type 1: Data, Type 2: Index
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0x018: ~~Unknown~~ A lot of 0s, but 0xFFFF at 0x20
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0x3c0: SHA-1 of Header 20B; SHA-1 of bytes 0x000-0x3BF, starts 64bytes before end of header
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~~~~~~~~Padding~~~~~~~~~ Padding of 0's till [Header Length]
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===SEGMENT HEADER=== (starts after SQPACK HEADER)
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0x000: Header Length Int32;
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Each Segment follows this (starting right after header length):
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0x000: Unknown/Num Dats Int32; For segment 2 it's the number of dats for this archive (dat0, dat1, etc), for others unknown.
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0x004: Segment Offset Int32; Offset to the segment
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0x008: Segment Size Int32; How large a segment is
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0x00c: SHA-1 of Segment 20B; Hash of the segment... [Segment Offset] to [Segment Offset] + [Segment Size]
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Notes:
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-Segment 1 is usually files, Segment 2/3 is unknown, Segment 4 is folders.
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-Segments may not exist, but their position is still treated as if they did (benchmark has no segment 3 but you still need to skip it's bytes).
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-Each segment is followed by a padding of 0x28 0's, except the first one, which has 4 extra 0s.
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===FILE SEGMENTS=== (each one is at each folder's [Files Offset], in segment 1) (Each is 16 bytes padded)
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0x000: File ID1 Hash Int32; Hash to the file name
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0x004: File ID2 Hash Int32; Hash to the file path
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0x008: File Data Offset Int32; Multiply by 0x08, points to compressed data in .dat file
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0x00b: Padding Padded to a total segment entry size of 16 bytes.
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===FOLDER SEGMENTS=== (seen in segment 3, points to files in segment 1) (Each is 16 bytes padded)
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0x000: FOLDER ID Hash Int32; Hash to the folder name
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0x004: Files Offset Int32; Offset to file list in segment 1.
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0x008: Total Files Size Int32; Total size of all file segments for this folder. To find # files, divide by 0x10 (16).
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0x00b: Padding Padded to a total segment entry size of 16 bytes.
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NOTES:
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-Check the final byte of the offset. If Offset & 0x000F == 2, then the offset is pointing to dat1 rather dat0. Also remember
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to subtract the 0x2 out. Theoretically, 0x4 would mean dat2 but unknown as of now.
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