what is the psp save encryption algorithm?

grief3r · Post by **grief3r** » Fri Apr 10, 2015 12:30 am

does anybody know the name of the algorithm or at least how the key is used to encrypt or decrypt a savedata

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Post by **qwikrazor87** » Fri Apr 10, 2015 12:42 am

the saves are encrypted with xor on top of AES encryption (using kirk).
reversed code of chnnlsv that deals with the encryption/decryption of the saves.
https://github.com/uofw/uofw/blob/maste ... /chnnlsv.c

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grief3r · Post by **grief3r** » Fri Apr 10, 2015 1:00 am

isnt xor part of the algorithm itself? because i heard somewhere that DES has 2 permutations that take the xor of the plaintext

Post by **qwikrazor87** » Fri Apr 10, 2015 1:12 am

grief3r wrote:isnt xor part of the algorithm itself? because i heard somewhere that DES has 2 permutations that take the xor of the plaintext

Yeah, but I wouldn't call plain old xor and AES a single algorithm, the xor part is optional, only used if the dev provides another key for it.

grief3r · Post by **grief3r** » Fri Apr 10, 2015 2:19 pm

How can I retrieve the key then?I know there is some module that maybe takes the key as a parameter? If so which module uses this key

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