GRAF:3D Sex Villa BXP

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BXP

• Format type: Archive
• Endianness: Little Endian

Format Specifications

// ARCHIVE HEADER

char {8}     - Header ("BXP" + (byte)2 + "ARCH")

uint64 {8}   - Archive Length [+32]

uint64 {8}   - Padding (88,39,255,135,206,225,196,1)

uint64 {8}   - null

// ARCHIVE INDEX

char {8}     - Header ("BXP" + (byte)2 + "INDX")

uint64 {8}   - Unknown

uint64 {8}   - Padding (88,39,255,135,206,225,196,1)

uint64 {8}   - null

byte {16}    - CRC?

byte {16}    - CRC? (same as above field)

// FOLDER TREE

char {8}     - Header ("BXP" + (byte)2 + "TREE")

uint64 {8}   - Offset to the "// FILE DATA" [+128] (ie relative to "// DIRECTORIES")

uint64 {8}   - Padding (88,39,255,135,206,225,196,1)

uint64 {8}   - null

// DIRECTORIES

// for each directory

char {8}     - Header ("BXP" + (byte)2 + "SDIR")

uint64 {8}   - Unknown Length/Offset

byte {16}    - null

uint32 {4}   - Number Of Sub-Directories in this directory

uint32 {4}   - Number Of Files in this directory

uint64 {8}   - Length Of Filename Directory Component (length of subDirName+null + fileNames+nulls)

byte {16}    - null

// for each sub-directory in this directory

uint32 {4}   - null

uint32 {4}   - Relative Offset To This Directory? (32) (relative to the start of this subDirEntry)

uint32 {4}   - Hash?

char {X}     - Sub-Directory Name

byte {1}     - null Sub-Directory Name Terminator

byte {X}     - null Padding to a multiple of 32 bytes

// for each file in this directory

uint64 {8}   - Filename Offset (relative to the start of the filename directory)

uint64 {8}   - null

byte {16}    - CRC?

uint32 {4}   - null

uint32 {4}   - Unknown (1)

uint64 {8}   - null

uint64 {8}   - File Length (not including the file header fields?)

uint64 {8}   - File Offset (relative to the start of the file data)

// repeat for each sub-directory (repeat from "// for each directory")

byte {32}    - CRC?

// FILENAME DIRECTORY

// for each file

char {X}     - Filename

byte {1}     - null Filename Terminator

byte {X}     - null Padding to a multiple of 32 bytes

// FILE DATA

char {8}     - Header ("BXP" + (byte)2 + "DATA")

uint64 {8}   - Total Length Of File Data (length of everything in "// for each file")

uint64 {8}   - Padding (88,39,255,135,206,225,196,1)

uint64 {8}   - null

// for each file

char {8}     - Header ("BXP" + (byte)2 + "FILE")

uint64 {8}   - File Length (length of "X - File Data" only) [+30]

uint64 {8}   - CRC?

uint32 {4}   - null

uint32 {4}   - Unknown (1)

byte {X}     - File Data

byte {X}     - null Padding to a multiple of 32 bytes

Notes and Comments

These were copied from the template, I'm not sure if they're on the right page.

Notes by Gregory:

1. In the version 24, the file names are encrypted as XOR 0xBE.

2. "BXP" + (byte) in all headers: In the version 24, the (byte)=3.

3. // ARCHIVE INDEX

   char {8}     - Header ("BXP" + (byte)2 + "INDX")
   uint64 {8}   - Unknown   <-----   this shuld be relative offset to the first "BXP.FILE" 

I have used folloxing piece of C++ code:

 ArchiveOffset = 0x00;
 IndexOffset = 0x20;
 TreeOffset = 0x60;
 DirOffset = 0x80;
 DataOffset = DirOffset + (__int64*) &buffer[TreeOffset + 8];
 FileOffset = DirOffset + (__int64*) &buffer[IndexOffset + 8];

4. There are some directories containing both files and sub-directories. In such case, the files are listed prior to the sub-directories. I guess that the structure of directory is:

 {
   char {8}     - Header ("BXP" + (byte)2 + "SDIR")
   uint64 {8}   - Unknown Length/Offset
   byte {16}    - null
   uint32 {4}   - Number Of Sub-Directories in this directory
   uint32 {4}   - Number Of Files in this directory
   uint64 {8}   - Length Of Filename Directory Component (length of subDirName+null + fileNames+nulls)
   byte {16}    - null 
   for (each file)
   {
     uint64 {8}   - Filename Offset (relative to the start of the filename directory)
     uint64 {8}   - null
     byte {16}    - CRC?
     uint32 {4}   - null
     uint32 {4}   - Unknown (1)    // or (0) - a switch?
     uint64 {8}   - null
     uint64 {8}   - File Length (not including the file header fields?)
     uint64 {8}   - File Offset (relative to the start of the file data) 
   }
   for (each sub-directory)
   {
     uint32 {4}   - null   // Filename Offset (relative to the start of the filename directory)
     uint32 {4}   - Relative Offset To This Directory? (32) (relative to the start of this subDirEntry)
   }
   for (each entry)            // entry is file or sub-directory
   {
     uint32 {4}   -   Hash?  
   } 
   for (each entry)
   {
     char {X}     - Filename                         // XOR 0xBE      in version 24
     byte {1}     - null Filename Terminator         // 0xBE          in version 24
   }
 }

5. I have successfuly extracted all files from the archive. Sound (*.ogg) files play well, however some other files (scripts) seems to be encrypted. Further I am wholly confused with CRCs, HASHs and Paddings for now, so I can not build an modified archive.

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