Editing VPK

[[Category:Software]]<noinclude>[[Category:Main]]</noinclude>

The scene's equivalent to Sony's [[Packages_(.PKGS)|PKGS]] format but in this case it's to be used with a [[HENkaku|HENkaku]]-enabled PS Vita or PS TV. It does not use any encryption over files so you can not install a '''VPK''' with the official PKG installer and vice versa. '''VitaShell''' can not install [[Packages_(.PKGS)|PKGS]] files.

== Make your own VPK files ==
Do it the same it would be done for self-made '''PKGS''' files but instead of the original encrypted files, use the ones from your project or from another place for non-encrypted app files.

== File format ==
=== File Layout===

*The PKZip (Zip) file. (.vpk) format consists of:

{| class="wikitable" style="text-align: center;"
|-
! style="background-color:#504B0314; color:000000;" |'''File Layout'''
|-
| style="background-color:lightblue; color:#000000;" |'''Local file header 1'''
|-
| style="background-color:lightblue; color:#000000;" |'''File data 1'''
|-
| style="background-color:lightblue; color:#000000;" |'''Data descriptor 1'''
|-
| style="background-color:lightblue; color:#000000;" |'''Local file header 2'''
|-
| style="background-color:lightblue; color:#000000;" |'''File data 2'''
|-
| style="background-color:lightblue; color:#000000;" |'''Data descriptor 2'''
|-
| style="background-color:lightblue; color:#000000;" |'''...''' 
|-
| style="background-color:lightblue; color:#000000;" |'''Local file header n'''
|-
| style="background-color:lightblue; color:#000000;" |'''File data n'''
|-
| style="background-color:lightblue; color:#000000;" |'''Data descriptor n'''
|-
| style="background-color:lightblue; color:#000000;" |'''Archive descriptor header'''
|-
| style="background-color:lightblue; color:#000000;" |'''Archive extra data record'''
|-
| style="background-color:lightblue; color:#000000;" |'''Central directory'''
|-
|}

=== Local File ===

*For a single local file:

{| class="wikitable" style="text-align: center;border:3px solid #123AAA;"
|-
!style="background-color:#123AAA; color:#FFFFFF;"|byte index
!style="background-color:#123AAA; color:#FFFFFF;"|Description
|-
|[0x00-0x03]||'''Signature''' of the local file header. This is always '\x50\x4b\x03\x04'.
|-
|[0x04-0x05]||'''Version'''
|-
|[0x06-0x07]||'''Flags'''
{| class="wikitable" style="font-size:x-small; text-align: center;border:3px dotted #123AAA;"
|-
!colspan="16" style="background-color:#FFFFFF; color:#000000;"|Bit index
|-
!colspan="1" style="background-color:lightblue; color:#FFFFFF;"|00
!colspan="2" style="background-color:lightblue; color:#FFFFFF;"|01-02 
!colspan="1" style="background-color:lightblue; color:#FFFFFF;"|03 
!colspan="1" style="background-color:lightblue; color:#FFFFFF;"|04 
!colspan="1" style="background-color:lightblue; color:#FFFFFF;"|05 
!colspan="1" style="background-color:lightblue; color:#FFFFFF;"|06 
!colspan="4" style="background-color:lightblue; color:#FFFFFF;"|07-10 
!colspan="1" style="background-color:lightblue; color:#FFFFFF;"|11 
!colspan="1" style="background-color:lightblue; color:#FFFFFF;"|12 
!colspan="1" style="background-color:lightblue; color:#FFFFFF;"|13 
!colspan="2" style="background-color:lightblue; color:#FFFFFF;"|14-15
|-
!colspan="1" style="background-color:#C0C0C0; color:#FFFFFF;"|encrypted file
!colspan="2" style="background-color:#C0C0C0; color:#FFFFFF;"|compression option
!colspan="1" style="background-color:#C0C0C0; color:#FFFFFF;"|data descriptor
!colspan="1" style="background-color:#C0C0C0; color:#FFFFFF;"|enhanced deflation
!colspan="1" style="background-color:#C0C0C0; color:#FFFFFF;"|compressed patched data
!colspan="1" style="background-color:#C0C0C0; color:#FFFFFF;"|strong encryption
!colspan="4" style="background-color:#C0C0C0; color:#FFFFFF;"|unused 
!colspan="1" style="background-color:#C0C0C0; color:#FFFFFF;"|language encoding 
!colspan="1" style="background-color:#C0C0C0; color:#FFFFFF;"|reserved 
!colspan="1" style="background-color:#C0C0C0; color:#FFFFFF;"|mask header values
!colspan="2" style="background-color:#C0C0C0; color:#FFFFFF;"|reserved
|}
|-
|[0x08-0x09]||'''Compression'''
*00: no compression
*01: shrunk
*02: reduced with compression factor 1
*03: reduced with compression factor 2 
*04: reduced with compression factor 3 
*05: reduced with compression factor 4 
*06: imploded
*07: reserved
*08: deflated
*09: enhanced deflated
*10: PKWare DCL imploded
*11: reserved
*12: compressed using BZIP2
*13: reserved
*14: LZMA
*15-17: reserved
*18: compressed using IBM TERSE
*19: IBM LZ77 z
*98: PPMd version I, Rev 1 
|-
|[0x0A-0x0B]||'''File modification time'''
stored in standard MS-DOS format:
*Bits 00-04: seconds divided by 2 
*Bits 05-10: minute
*Bits 11-15: hour
|-
|[0x0C-0x0D]||'''File modification date:'''
stored in standard MS-DOS format:
*Bits 00-04: day
*Bits 05-08: month
*Bits 09-15: years from 1980
|-
|[0x0E-0x11]||'''Crc-32:'''
|-
|}