37 lines
972 B
C++
37 lines
972 B
C++
/*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
*
|
|
* Copyright 2017-2018 Danny Robson <danny@nerdcruft.net>
|
|
*/
|
|
|
|
|
|
#include "./salsa.hpp"
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
std::array<uint8_t,64>
|
|
cruft::crypto::stream::salsa20 (const std::array<uint8_t,64> bytes) noexcept
|
|
{
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wcast-align"
|
|
auto x = *reinterpret_cast<const std::array<uint32_t,16>*> (&bytes);
|
|
auto y = x;
|
|
|
|
for (auto &t: x)
|
|
t = util::ltoh (t);
|
|
|
|
for (int i = 0; i < 10; ++i)
|
|
x = salsa::doubleround (x);
|
|
|
|
for (size_t i = 0; i < std::size (y); ++i)
|
|
x[i] += y[i];
|
|
|
|
for (auto &t: x)
|
|
t = util::htol (t);
|
|
|
|
return *reinterpret_cast<std::array<uint8_t,64>*> (&x);
|
|
#pragma GCC diagnostic pop
|
|
}
|