Title: Re: DimSport MyGenius FPF File Format XOR Cipher If we could figure out how to encode/decode the files, we could share tunes and never need to be charged $3k for a tune again. I was wondering if anybody had any ideas. I can't get my hands on a working copy of Race Evo or DSManager to know for sure (and they sometimes pack their DLLs/apps with Themida.), but I do have some files that seem to line up pretty much 99%.
From what I can tell, they do not have the handheld device encryption/decryption/cipher algorithm in any DLL related to the MyGenius client.
However, they do a special kind of XOR cipher encryption for the rest of the file. I was able to reverse the header XOR cipher that they do. Once you decrypt your FPF/MYG file, you get `GEN_FILE`, a magic number + header length + maybe some kind of file type + checksum.
Their client uses `polarcrypto.dll` to derive keys from your key + other passwords, as well as decrypt your data. Every MyGenius has a private + public key store on it (License.lic)
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