xorstr

xorstr

A heavily vectorized c++17 compile time string encryption.

quick example

int main() {
    std::puts(xorstr_("an extra long hello_world"));
}

API

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noteworthy things

• All keys are 64bit and generated during compile time.
• Data blocks go in increments of 16 bytes so some space may be wasted.
• The code has been crafted so that all the data would be embedded directly into code and not stored on .rdata and such.
• The entirety of string encryption and decryption will be inlined.

supported compilers and platforms

Tested to be working on clang 5.0+, gcc 7.1+ and MSVC v141. If your CPU does not support AVX define JM_XORSTR_DISABLE_AVX_INTRINSICS to only use SSE.

example assembly output

Output of gcc (trunk) from the quick example

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