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89 lines
2 KiB
C++
89 lines
2 KiB
C++
/* dh.hpp
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*
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* Copyright (C) 2003 Sawtooth Consulting Ltd.
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*
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* This file is part of yaSSL.
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*
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* yaSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* yaSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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/* dh.hpp provides Diffie-Hellman support
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*/
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#ifndef TAO_CRYPT_DH_HPP
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#define TAO_CRYPT_DH_HPP
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#include "misc.hpp"
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#include "integer.hpp"
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namespace TaoCrypt {
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class Source;
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// Diffie-Hellman
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class DH {
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public:
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DH() {}
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DH(Integer& p, Integer& g) : p_(p), g_(g) {}
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explicit DH(Source&);
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DH(const DH& that) : p_(that.p_), g_(that.g_) {}
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DH& operator=(const DH& that)
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{
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DH tmp(that);
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Swap(tmp);
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return *this;
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}
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void Swap(DH& other)
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{
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p_.Swap(other.p_);
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g_.Swap(other.g_);
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}
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void Initialize(Source&);
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void Initialize(Integer& p, Integer& g)
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{
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SetP(p);
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SetG(g);
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}
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void GenerateKeyPair(RandomNumberGenerator&, byte*, byte*);
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void Agree(byte*, const byte*, const byte*);
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void SetP(const Integer& p) { p_ = p; }
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void SetG(const Integer& g) { g_ = g; }
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Integer& GetP() { return p_; }
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Integer& GetG() { return g_; }
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// for p and agree
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word32 GetByteLength() const { return p_.ByteCount(); }
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private:
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// group parms
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Integer p_;
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Integer g_;
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void GeneratePrivate(RandomNumberGenerator&, byte*);
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void GeneratePublic(const byte*, byte*);
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};
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} // namespace
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#endif // TAO_CRYPT_DH_HPP
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