37 lines
1.1 KiB
C++
37 lines
1.1 KiB
C++
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#include <cstdint>
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#include <iostream>
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#include "dpf.hpp"
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// Complete program. The parties already hold XOR shares of alpha.
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// The pad stream is local here; a real protocol would draw it from a dealer
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// who never sees alpha.
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//
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// c++ -std=c++17 -march=native -I include -I thirdparty examples/mwe/shared_index.cpp
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int main()
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{
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const std::uint8_t alpha = 42;
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const std::uint64_t beta = 7;
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const std::uint8_t x0 = 7;
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const std::uint8_t x1 = static_cast<std::uint8_t>(alpha ^ x0);
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auto root = []() { return dpf::uniform_sample<simde__m128i>(); };
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struct pad
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{
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simde__m128i block() { return dpf::uniform_sample<simde__m128i>(); }
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std::uint8_t bit()
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{
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return static_cast<std::uint8_t>(dpf::uniform_sample<unsigned>() & 1u);
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}
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};
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dpf::ds_randomness<decltype(root), pad> rng{root, {}};
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auto keys = dpf::make_dpf_doerner_shelat(x0, x1, rng, beta);
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const std::uint64_t opened = dpf::reconstruct(
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*dpf::eval_point(keys.first, alpha),
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*dpf::eval_point(keys.second, alpha));
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std::cout << opened << "\n";
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return opened == beta ? 0 : 1;
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}
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