mirror of
https://github.com/biergaizi/codecrypt
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54 lines
1.2 KiB
C++
54 lines
1.2 KiB
C++
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/*
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* This file is part of Codecrypt.
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*
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* Copyright (C) 2013-2017 Mirek Kratochvil <exa.exa@gmail.com>
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*
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* Codecrypt is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or (at
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* your option) any later version.
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*
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* Codecrypt is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Codecrypt. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _ccr_generator_h_
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#define _ccr_generator_h_
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#include "chacha.h"
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#include "prng.h"
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#include <stdint.h>
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class ccr_rng : public prng
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{
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public:
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typedef uint64_t randmax_t;
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chacha20 r;
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ccr_rng() {
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r.init ();
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}
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~ccr_rng() {
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r.clear();
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}
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bool seed (uint bits, bool quick = true);
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uint random (uint n) {
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randmax_t i;
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r.gen (sizeof (randmax_t), (byte*) &i);
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return i % n;
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}
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};
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#endif
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