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MySQL 5.1: mysql/src/5.1-dbg/extra/yassl/taocrypt/include/dh.hpp Source File
mysql/src/5.1-dbg/extra/yassl/taocrypt/include/dh.hpp

00001 /* dh.hpp                                
00002  *
00003  * Copyright (C) 2003 Sawtooth Consulting Ltd.
00004  *
00005  * This file is part of yaSSL.
00006  *
00007  * yaSSL is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 2 of the License, or
00010  * (at your option) any later version.
00011  *
00012  * There are special exceptions to the terms and conditions of the GPL as it
00013  * is applied to yaSSL. View the full text of the exception in the file
00014  * FLOSS-EXCEPTIONS in the directory of this software distribution.
00015  *
00016  * yaSSL is distributed in the hope that it will be useful,
00017  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00019  * GNU General Public License for more details.
00020  *
00021  * You should have received a copy of the GNU General Public License
00022  * along with this program; if not, write to the Free Software
00023  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
00024  */
00025 
00026 /* dh.hpp provides Diffie-Hellman support
00027 */
00028 
00029 
00030 #ifndef TAO_CRYPT_DH_HPP
00031 #define TAO_CRYPT_DH_HPP
00032 
00033 #include "misc.hpp"
00034 #include "integer.hpp"
00035 
00036 namespace TaoCrypt {
00037 
00038 
00039 class Source;
00040 
00041 
00042 // Diffie-Hellman
00043 class DH {
00044 public:
00045     DH() {}
00046     DH(Integer& p, Integer& g) : p_(p), g_(g) {}
00047     explicit DH(Source&);
00048 
00049     DH(const DH& that) : p_(that.p_), g_(that.g_) {}
00050     DH& operator=(const DH& that) 
00051     {
00052         DH tmp(that);
00053         Swap(tmp);
00054         return *this;
00055     }
00056 
00057     void Swap(DH& other)
00058     {
00059         p_.Swap(other.p_);
00060         g_.Swap(other.g_);
00061     }
00062 
00063     void Initialize(Source&);
00064     void Initialize(Integer& p, Integer& g)
00065     {
00066         SetP(p);
00067         SetG(g);
00068     }
00069 
00070     void GenerateKeyPair(RandomNumberGenerator&, byte*, byte*);
00071     void Agree(byte*, const byte*, const byte*, word32 otherSz = 0);
00072 
00073     void SetP(const Integer& p) { p_ = p; }
00074     void SetG(const Integer& g) { g_ = g; }
00075 
00076     Integer& GetP() { return p_; }
00077     Integer& GetG() { return g_; }
00078 
00079     // for p and agree
00080     word32 GetByteLength() const { return p_.ByteCount(); }
00081 private:
00082     // group parms
00083     Integer p_;
00084     Integer g_;
00085 
00086     void GeneratePrivate(RandomNumberGenerator&, byte*);
00087     void GeneratePublic(const byte*, byte*);    
00088 };
00089 
00090 
00091 } // namespace
00092 
00093 #endif // TAO_CRYPT_DH_HPP
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