Hacking Need help decrypting a .cpk archive from a PSP game

[pspextractor]

Hello everyone,

I am currently trying to decrypt the .cpk archive using JPCSP to dump the files into the TMP folder since the internet recommends that. However I keep getting a black screen which i can't seem to fix after looking for solutions.

Now, I am wondering if there are other ways to decrypt a .cpk archive. Or if someone could help me with the JPCSP error. It says java.lang.outofmemoryerror: Java heap space.

Post automatically merged: Jul 14, 2023

this is what appears in the command box when trying to run a game. I also tested both 32-bit and 64-bit versions of JPCSP, and the same error seems to occur.

 

[master801]

JCPSP isn't useful for .CPK files at all.

You need a specific .CPK extractor program, and maybe hope it extracts.

A lot of tools already extract some .CPK files because it's a re-used file, so whatever.

 

[pspextractor]

JCPSP isn't useful for .CPK files at all.

You need a specific .CPK extractor program, and maybe hope it extracts.

A lot of tools already extract some .CPK files because it's a re-used file, so whatever.

Yeah most of the threads i read were all from 2011-2013ish (for example the figure attached below)

However in order to extract the CPK file i need to decrypt it first, hence why i try to use JPCSP

and thank you for the answer, do you perhaps know any good programs which are able to decrypt the CPP archive then?

 

[Halcón Negro]

Hello everyone,

I am currently trying to decrypt the .cpk archive using JPCSP to dump the files into the TMP folder since the internet recommends that. However I keep getting a black screen which i can't seem to fix after looking for solutions.

Now, I am wondering if there are other ways to decrypt a .cpk archive. Or if someone could help me with the JPCSP error. It says java.lang.outofmemoryerror: Java heap space.

Post automatically merged: Jul 14, 2023

this is what appears in the command box when trying to run a game. I also tested both 32-bit and 64-bit versions of JPCSP, and the same error seems to occur.

for .cpk files i used YACpkTool_v1.1

 

[pspextractor]

for .cpk files i used YACpkTool_v1.1

okay thank you, by now i managed to decrypt it by using pgdecrypter.exe (it was a PGD file containing the CPK's not a CPK file)