this post was submitted on 21 Jul 2023
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C++ AES-256 encryption at compile-time (github.com)
submitted 1 year ago by MarekKnapek to c/cpp
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Do you want to encrypt something and include it into your application? Don't want to use pre-build step? Encrypt it at compile-time! Decrypt it at run-time, assuming end-user knows the key or password. Plain-text is not stored inside your binary file. https://github.com/MarekKnapek/mk_clib#constexpr-aes-256-encryption-and-run-time-decryption

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[–] MarekKnapek 2 points 1 year ago

Think of advanced features of WinRAR not being accessible without valid licence key. Ehm, WinRAR distributes the same binary for both licensed and unlicensed users, unlocking the features with license key or with a crack (equivalent of NOPing the if). What if instead WinRAR distributed different binary for each licensed user, advanced features encrypted by per-user key. Crack or keygen would need to use some particular user's binary with theirs license. Easily trackable. Or crack would need need to be applied once and then distribute the un-encrypted features / code.