mirror of
https://github.com/biergaizi/codecrypt
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69 lines
1.6 KiB
C++
69 lines
1.6 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) 2013-2016 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_xsynd_h_
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#define _ccr_xsynd_h_
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#include "sc.h"
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#include <stdint.h>
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/*
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* This is a stream cipher based on XSYND, the stream cipher with
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* mathematicaly provable (AND also proven) security.
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*
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* Parameters chosen for this implementation were chosen to have better attack
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* security than "standard" 2^256 and cool round numbers. Fuck speed.
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*
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* n=32768, r=1024, omega=128, b=8
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*
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* To be cool, everything is written with 64-bit integers.
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*/
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class xsynd : public streamcipher
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{
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public:
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uint64_t R1[16];
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byte block[128];
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int blockpos;
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void init();
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void clear() {
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init();
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}
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void load_key (const byte*begin, const byte*end);
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byte gen();
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void gen (size_t n, byte*out);
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//advisory values for effective usage
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size_t key_size() {
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return 128;
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}
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size_t block_size() {
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return 128;
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}
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};
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#endif
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