Packages (.PKG): Difference between revisions
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typedef struct{ | typedef struct{ | ||
u32 | u32 magic; // 0x7F657874 ".ext" | ||
u32 | u32 unknown_1; // static = 1 | ||
u32 | u32 ext_header_size; // 0x40 | ||
u32 | u32 ext_data_size; // 0x180 | ||
u32 | u32 main_ext_headers_hmac_offset; // 0x100 | ||
u32 | u32 metadata_header_hmac; // ex: 0x00000360, Beta = 0x00000390, Retail = 0x00000490 | ||
u64 | u64 tail_offset // tail size seams to be always 0x1A0 | ||
u32 padding1; // 0x00000000 | |||
u32 | u32 pkg_key_id; // Beta = 0x00000001 (PSP), Retail PSVita = 0xC0000002 | ||
u32 | u32 full_header_hmac; // Beta 0x00000000, Retail = 0x00000930 | ||
u32 | u8 padding2[0x14]; | ||
} ext_Header; | } ext_Header; | ||
</pre> | </pre> | ||
Revision as of 22:57, 19 April 2018
There are two kinds of PS VITA package files (.pkg):
1. PS VITA Game Packages (.pkg)
2. PS VITA System Packages (.pkg)
Keys
pkg_key_psp: 07F2C68290B50D2C33818D709B60E62B pkg_vita_2: E31A70C9CE1DD72BF3C0622963F2ECCB pkg_vita_3: 423ACA3A2BD5649F9686ABAD6FD8801F pkg_vita_4: AF07FD59652527BAF13389668B17D9EA
Game Packages
Debug and Retail v1.0 (not the actual ones) PS VITA Game Package files (.pkg) can be decrypted & extracted using the "PS VITA .pkg xTractor"
A picture showing the unpacked game .pkg structure:
See also: System_File_Object_(SFO)_(PSF), Keys and PKG type
.ext Header
typedef struct{
u32 magic; // 0x7F657874 ".ext"
u32 unknown_1; // static = 1
u32 ext_header_size; // 0x40
u32 ext_data_size; // 0x180
u32 main_ext_headers_hmac_offset; // 0x100
u32 metadata_header_hmac; // ex: 0x00000360, Beta = 0x00000390, Retail = 0x00000490
u64 tail_offset // tail size seams to be always 0x1A0
u32 padding1; // 0x00000000
u32 pkg_key_id; // Beta = 0x00000001 (PSP), Retail PSVita = 0xC0000002
u32 full_header_hmac; // Beta 0x00000000, Retail = 0x00000930
u8 padding2[0x14];
} ext_Header;
PSN
Game Update
It is a bit upgraded but basicly the same as on PS3. Once a game tab is opened, the VITA downloads a PKG for this game tab. This includes update information, such as if an update if available. If thats the case, the game tab will show you a yellow arrow on the top of the screen which gives you information about the update available. This information is stored in XML's which are gathered via URL's like this example one:
http://gs.ww.np.dl.playstation.net/ppkg/np/PCSG00001/PCSG00001_T1/0101/c653f481544f8b19/changeinfo.xml
this is the content:
<?xml version="1.0" encoding="UTF-8"?>
<changeinfo titleid="PCSG00001">
<changes app_ver="01.01">
<![CDATA[
オンライン仕様に関わる動作の安定性を向上しました
]]>
</changes>
</changeinfo>
This is the original update PKG.
http://gs.ww.np.dl.playstation.net/ppkg/np/PCSG00001/PCSG00001_T1/c653f481544f8b19/JP0700-PCSG00001_00-RIDGERACERPSVITA-A0101-V0100-fd9baf01343b2db6df0d434b17ef822a9699c6da-PE.pkg
the update is stored with the XML.
http://gs.ww.np.dl.playstation.net/ppkg/np/[TITLE_ID]/[TITLE_ID]_T1/[Version]/[An HASH]/changeinfo.xml
Package Installer uses SceNpDrm to decrypt/extract the game package into a temporary directory. Then it calls ScePromoterUtil NID 0x86641BC6 on 1.69 and NID 0x716C81F4 on 1.80+ to "promote" (aka install) the files into the right directory in ux0. ScePromoterUtil is just a wrapper for a SceShellSvc call, so SceShell actually moves the files, then adds the LiveArea bubble and updates app.db accordingly. In theory you can use SceNpDrm and ScePromoterUtil separately and package your games in an alternative format.
System Package
PS VITA Firmware Package files (.pkg) are inside PS VITA Update Files (.pup).
Those packages can not be decrypted, yet.
Structure
Bytes are in Little Endian.
typedef struct {
unint32_t type; /*type of pkg. must be 0x3 (Offset 0x04)*/
unint64_t unknown; /*unknown but static (Offset 0x08)*/
unint64_t hdr_size; /*header size (Offset 0x10)*/
unint64_t content_size; /*package content size (Offset 0x18)*/
unint64_t size; /*package size (Offset 0x20)*/
} s_pkg;