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

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pspextractor

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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.
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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.
 

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master801

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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.
 
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pspextractor

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master801 said:
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.
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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?
 

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Halcón Negro

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pspextractor said:
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:

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.
Click to expand...
for .cpk files i used YACpkTool_v1.1
 
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