42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
|
/*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*
|
||
|
|
* 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
|
||
|
|
{
|
||
|
|
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);
|
||
|
|
}
|