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imported>Mr.Mouse |
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| === Notes and Comments === | | === Notes and Comments === |
| 1.
| | {{{notes}}} |
| In the version 24, the file names are encrypted as XOR 0xBE.
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| 2.
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| "BXP" + (byte) in all headers: In the version 24, the (byte)=3.
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| 3.
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| // ARCHIVE INDEX
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| char {8} - Header ("BXP" + (byte)2 + "INDX")
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| uint64 {8} - Unknown '''<----- this shuld be relative offset to the first "BXP.FILE"'''
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| I have used folloxing piece of C++ code:
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| ArchiveOffset = 0x00;
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| IndexOffset = 0x20;
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| TreeOffset = 0x60;
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| DirOffset = 0x80;
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| DataOffset = DirOffset + (__int64*) &buffer[TreeOffset + 8];
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| FileOffset = DirOffset + (__int64*) &buffer[IndexOffset + 8];
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| 4.
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| There are some directories containing both files and sub-directories. In such case, the files are listed prior to the sub-directories.
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| I guess that the structure of directory // see 6.
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| 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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| 6. "uint32 {4} - Unknown (1)" is a switch: 0="file is not compressed" 1="file is compressed"; compression method is zlib (*.gz). The same switch is in the "BXP.FILE" section.
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| I suguest that to modify the structure of "BXP.SDIR" to:
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| {
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| char {8} - Header ("BXP" + (byte)2 + "SDIR")
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| uint64 {8} - Unknown Length/Offset
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| byte {16} - null
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| uint32 {4} - Number Of Sub-Directories in this directory
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| uint32 {4} - Number Of Files in this directory
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| uint64 {8} - Length Of Filename Directory Component (length of subDirName+null + fileNames+nulls)
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| byte {16} - null
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| for (each file)
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| {
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| uint64 {8} - Filename Offset (relative to the start of the filename directory)
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| uint64 {8} - null
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| byte {16} - CRC?
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| uint32 {4} - null
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| uint32 {4} - A switch indicating if the file is compressed. 0=no, 1=yes //compression method: zlib (*.gz)
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| uint64 {8} - null
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| uint64 {8} - File Length (not including the file header fields?)
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| uint64 {8} - File Offset (relative to the start of the file data)
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| }
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| for (each sub-directory)
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| {
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| uint32 {4} - null // Filename Offset (relative to the start of the filename directory)
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| uint32 {4} - Relative Offset To This Directory? (32) (relative to the start of this subDirEntry)
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| }
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| for (each entry) // entry is file or sub-directory
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| {
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| uint32 {4} - Hash?
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| }
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| for (each entry)
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| {
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| char {X} - Filename // XOR 0xBE in version 24
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| byte {1} - null Filename Terminator // 0xBE in version 24
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| }
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| }
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| 7. First 32 bytes of each file if "File Data" is a header of checksum, which is not necessary for file extraction.
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|
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| {
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| // FILE DATA
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| char {8} - Header ("BXP" + (byte)2 + "DATA")
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| uint64 {8} - Total Length Of File Data (length of everything in "// for each file")
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| uint64 {8} - Padding (88,39,255,135,206,225,196,1)
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| uint64 {8} - null
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| for (each file)
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| {
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| char {8} - Header ("BXP" + (byte)2 + "FILE")
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| uint64 {8} - File Length (length of "X - File Data" only) [+30]
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| uint64 {8} - CRC?
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| uint32 {4} - null
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| uint32 {4} - A switch indicating if the file is compressed. 0=no, 1=yes //compression method: zlib (*.gz)
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| byte (16) - A header or check-sum?
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| byte (16) - For uncompressed file the same as previous byte (16), for copressed different. Maybe check-sum of decompressed file?
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| byte {X} - File Data
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| byte {X} - null Padding to a multiple of 32 bytes
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| }
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| }
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| *** by Gregory
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| === MultiEx BMS Script === | | === MultiEx BMS Script === |