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== PSP Game Savedata ==
== PSP Game Savedata ==
=== Savedata protections ===
Most PSP games have a common encryption system whose encryption key is per-game. The encrypted savedata is often named DATA.BIN. The per-game key can be dumped using a plugin on an actual PSP: SGKeyDumper by qwikrazor87. The savedata can be decrypted on PC using [https://github.com/38-vita-38/psp-save psp-save by 38-vita-38] or [https://github.com/cielavenir/psp-savedata-endecrypter psp-savedata-endecrypter by popsdeco/cielavenir] or [https://github.com/BrianBTB/SED-PC SED-PC by BrianBTB] or on PSP using [https://github.com/bucanero/apollo-psp Apollo Save Tool (PSP) by bucanero] or SED (Savegame Encrypt/Decrypt).
Some PSP games have an additional encryption applied to their savedata. This system was already present in some PlayStation and PlayStation 2 games:
* Tekken 2 and 3 for PS1.
* Bandai Namco Entertainment used a previously unknown feature of PS2 memory cards (per sector encryption on flash raw sectors) to protect the quest data memory card on the System 246 version of Soul Calibur 2 Arcade game. One cannot move the save data from one memory card to another because the game uses the per card crypto seed.
See also [https://github.com/bucanero/save-decrypters/] and [https://community.wemod.com/t/philymasters-security-archive/3923]
Some games store digests in the savedata to ensure integrity.
==== Tekken 6 ====
The first 0x20 bytes of MAINDATA.SAV, GHOST.SAV and REPLAY.SAV of PS3 Tekken 6 are not encrypted and are a sort of header. They contain filesize and maybe digest. The remaining data in the files are encrypted with an unknown algorithm (maybe AES128 with a per-console key based on eid0).
MAINDATA.SAV of PSP Tekken 6 is fully encrypted without any header. The game calls [[Kirk]] command 5 to encrypt/decrypt savedata with a key derived from per-console [[Fuse ID]]. This file can be decrypted on PC with the command <code>psp-save -d KEY.BIN 5 MAINDATA.SAV MAINDATA_DEC.SAV</code> where KEY.BIN is the per-console key. This per-console key can be dumped using Apollo Save Tool (PSP) or derived from the console's [[Fuse ID]].
==== Gladiator Begins Demo ====
==== Gran Turismo ====
==== Invizimals ====
Invizimals PSP game stores a checksum in its savedata. It also maybe encrypts it (to check).
https://github.com/bucanero/save-decrypters/tree/master/invizimals-checksum-fixer
==== SOCOM U.S. Navy SEALs games ====
Custom savedata encryption may concern the following PSP games:
* SOCOM U.S. Navy SEALs: Fireteam Bravo
* SOCOM U.S. Navy SEALs: Fireteam Bravo 2
* SOCOM U.S. Navy SEALs: Fireteam Bravo 3
* SOCOM U.S. Navy SEALs: Tactical Strike
==== Patapon 3 ====
https://github.com/bucanero/save-decrypters/tree/master/patapon3-decrypter
==== Monster Hunter games ====
Monster Hunter PSP and Nintendo 3DS games use a custom encryption system and a custom SHA1 integrity hash. It concerns the following games and DLCs:
* Monster Hunter Freedom Unite (ULUS10391/ULES01213)
* Monster Hunter Portable 2nd G (ULJM05500)
* Monster Hunter Portable 3rd (ULJM05800)
* Quests - MH Freedom Unite (ULUS10391/ULES01213)
* Quests - MH Portable 2nd G (ULJM05500)
* Quests - MH Portable 3rd (ULJM05800)
https://github.com/bucanero/save-decrypters/tree/master/monsterhunter-decrypter


=== Blacklisted games ===
=== Blacklisted games ===
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According to Jeerum (2010), every EA game on PSP gets a buffer overflow if you try hard enough: insert 1 kB or 2 kB into your profile name in the save data.
According to Jeerum (2010), every EA game on PSP gets a buffer overflow if you try hard enough: insert 1 kB or 2 kB into your profile name in the save data.
See https://en.wikipedia.org/wiki/List_of_Electronic_Arts_games%3A_2000%E2%80%932009 and https://en.wikipedia.org/wiki/List_of_Electronic_Arts_games:_2010%E2%80%932019 .


=== Before PS Vita era ===
=== Before PS Vita era ===
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Hot Shots Golf, Hot Shots Golf 2, Hot Shots Golf - Non-Greatest Hits
Hot Shots Golf, Hot Shots Golf 2, Hot Shots Golf - Non-Greatest Hits
This game is unfortunately fairly old, which makes it not so useful for things such as Half Byte Loader. Basically, Half Byte Loader needs a game that imports as many libraries as possible, especially recent ones, to have a better compatibility with homebrews.


https://wololo.net/talk/viewtopic.php?f=3&t=51
https://wololo.net/talk/viewtopic.php?f=3&t=51
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==== "Jikkyou Powerful Pro Yakyu 2012 Ketteiban" (Japanese: 実況パワフルプロ野球 2012決定版) (ULJM06206) by 173210: <= 2.61 ====
==== "Jikkyou Powerful Pro Yakyu 2012 Ketteiban" (Japanese: 実況パワフルプロ野球 2012決定版) (ULJM06206) by 173210: <= 2.61 ====
==== Pursuit Force and Pursuit Force - Extreme Justice: <= ?2.61?. Patched 3.00 ====
According to the PS Vita blacklist, Pursuit Force games savedata vulnerabilities are exploitable on some PS Vita System Software versions < 3.00.


==== Pipe Madness by Frostegater: <= 2.61. Patched 3.00 ====
==== Pipe Madness by Frostegater: <= 2.61. Patched 3.00 ====
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==== MyStylist: <= 3.15 ====
==== MyStylist: <= 3.15 ====


==== Skate Park City by freakler: <= 3.15. Patched 3.18 ====
==== Skate Park City: <= 3.15. Patched 3.18 ====
 
Exploited by freakler in 2014, then patched since PS Vita System Software version 3.18.


==== Space Invaders Extreme: <= 3.18 ====
==== Space Invaders Extreme: <= 3.18 ====
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==== Gladiator Begins Demo (NPEH90050, NPUH90077, NPJH90084) by qwikrazor87: <= 3.18 ====
==== Gladiator Begins Demo (NPEH90050, NPUH90077, NPJH90084) by qwikrazor87: <= 3.18 ====


Discovered in 2010 by anonymous and around 2014-09-12 by qwikrazor87.
Discovered around 2014-09-12 by qwikrazor87.
 
It is fairly easy to get this exploit to work as it is a buffer overflow in the player's name.
 
The savedata in Gladiator Begins Demo only work on the PSP that created them.


https://wololo.net/talk/viewtopic.php?t=39771
https://wololo.net/talk/viewtopic.php?t=39771
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==== Ape Escape: On the Loose: <= 3.50. Patched 3.51 ====
==== Ape Escape: On the Loose: <= 3.50. Patched 3.51 ====
There is a classical buffer overflow exploit in the player's name. This exploit was found in parallel be several people in 2010. This game is really easy to exploit (see the [https://wololo.net/2010/02/27/writing-a-binary-loader/ tutorial]).
This game is unfortunately fairly old, which makes it not so useful for things such as Half Byte Loader. Basically, Half Byte Loader needs a game that imports as many libraries as possible, especially recent ones, to have a better compatibility with homebrews.


==== "Toukiden: Kiwami (DEMO)" (討鬼伝 極 体験版) by 173210: <= 3.51 ====
==== "Toukiden: Kiwami (DEMO)" (討鬼伝 極 体験版) by 173210: <= 3.51 ====
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https://code.google.com/archive/p/valentine-hbl/source/default/source
https://code.google.com/archive/p/valentine-hbl/source/default/source


==== God of War - Ghost of Sparta by sockse and qwikrazor87: <= ?3.52? ====
==== Puzzle Scape: <= 3.52 ====
 
Exploited by sockse and qwikrazor87 in 2014.
 
==== Fight Night Round 3 by sockse and qwikrazor87: <= ?3.52? ====
 
Exploited by sockse and qwikrazor87 in 2014.
 
==== Hero of Sparta (PSP Minis) by sockse and qwikrazor87: <= ?3.52? ====
 
Exploited by sockse and qwikrazor87 in 2014, then patched.
 
==== Echoes (PSP Minis) by sockse: <= ?3.52? ====
 
Exploited by sockse in 2014, then patched.
 
==== Puzzle Scape by sockse and qwikrazor87: <= 3.52 ====
 
Exploited by sockse in 2014, then patched, then exploited in a different way by qwikrazor87 again in 2014.


==== World of Pool, Pool Hall Pro: <= 3.52 ====
==== World of Pool, Pool Hall Pro: <= 3.52 ====
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https://github.com/173210/psp_exploits/
https://github.com/173210/psp_exploits/
==== Field Commander by sockse: <= ? ====
Discovered in 2014 by sockse.


==== Mega Man Powered Up or Rockman Rockman: <= ? ====
==== Mega Man Powered Up or Rockman Rockman: <= ? ====
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=== After PS Vita era ===
=== After PS Vita era ===


==== Scrabble by sockse and ChampionLeake: probably not patched, 2018-05-17 ====
==== ScrabbleTM by ChampionLeake: probably not patched, 2018-05-17 ====
 
Discovered by sockse (see [https://web.archive.org/web/20230429162635/https://wololo.net/talk/viewtopic.php?t=39756 writeup by sockse (2014-09-16)]) then patched on PSP but exploited in a different way later by ChampionLeake.


https://github.com/ChampionLeake/scrabblehax
https://github.com/ChampionLeake/scrabblehax
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https://pastebin.com/Sdz0XPRg
https://pastebin.com/Sdz0XPRg


== _sceUsbGpsGetData kernel write kexploit by sockse, qwikrazor87 and Acid_snake: PS Vita <= ?3.20? ==
== _sceUsbGpsGetData kernel write kexploit by qwikrazor87 and Acid_snake: PS Vita <= ?3.20? ==


Discovered around 2014-01-29 by sockse, qwikrazor87 and Acid_snake. See [https://web.archive.org/web/20230429162635/https://wololo.net/talk/viewtopic.php?t=39756 writeup by sockse (2014-09-16)].
Discovered around 2014-01-29 by qwikrazor87 and Acid_snake.


Simply call <code>_sceUsbGpsGetData(0x10000, sw_address);</code> where <code>sw_address</code> is the address of the function to hijack, usually _sceKernelLibcTime.
Simply call <code>_sceUsbGpsGetData(0x10000, sw_address);</code> where <code>sw_address</code> is the address of the function to hijack, usually _sceKernelLibcTime.
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https://github.com/BASLQC/BASLQC/wiki/PSP-Custom-Firmware-History#History_of_homebrew_on_PSP
https://github.com/BASLQC/BASLQC/wiki/PSP-Custom-Firmware-History#History_of_homebrew_on_PSP
<references />
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