/* dsa.hpp * * Copyright (C) 2003 Sawtooth Consulting Ltd. * * This file is part of yaSSL. * * yaSSL is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * yaSSL is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA */ /* dsa.hpp provides Digitial Signautre Algorithm see FIPS 186-2 */ #ifndef TAO_CRYPT_DSA_HPP #define TAO_CRYPT_DSA_HPP #include "integer.hpp" namespace TaoCrypt { class Source; class DSA_PublicKey { protected: Integer p_; Integer q_; Integer g_; Integer y_; public: DSA_PublicKey() {} explicit DSA_PublicKey(Source&); void Initialize(Source&); void Initialize(const Integer& p, const Integer& q, const Integer& g, const Integer& y); const Integer& GetModulus() const; const Integer& GetSubGroupOrder() const; const Integer& GetSubGroupGenerator() const; const Integer& GetPublicPart() const; void SetModulus(const Integer&); void SetSubGroupOrder(const Integer&); void SetSubGroupGenerator(const Integer&); void SetPublicPart(const Integer&); word32 SignatureLength() const; DSA_PublicKey(const DSA_PublicKey&); DSA_PublicKey& operator=(const DSA_PublicKey&); void Swap(DSA_PublicKey& other); }; class DSA_PrivateKey : public DSA_PublicKey { Integer x_; public: DSA_PrivateKey() {} explicit DSA_PrivateKey(Source&); void Initialize(Source&); void Initialize(const Integer& p, const Integer& q, const Integer& g, const Integer& y, const Integer& x); const Integer& GetPrivatePart() const; void SetPrivatePart(const Integer&); private: DSA_PrivateKey(const DSA_PrivateKey&); // hide copy DSA_PrivateKey& operator=(const DSA_PrivateKey&); // and assign }; class DSA_Signer { const DSA_PrivateKey& key_; Integer r_; Integer s_; public: explicit DSA_Signer(const DSA_PrivateKey&); word32 Sign(const byte* sha_digest, byte* sig, RandomNumberGenerator&); const Integer& GetR() const; const Integer& GetS() const; private: DSA_Signer(const DSA_Signer&); // hide copy DSA_Signer& operator=(DSA_Signer&); // and assign }; class DSA_Verifier { const DSA_PublicKey& key_; Integer r_; Integer s_; public: explicit DSA_Verifier(const DSA_PublicKey&); bool Verify(const byte* sha_digest, const byte* sig); const Integer& GetR() const; const Integer& GetS() const; private: DSA_Verifier(const DSA_Verifier&); // hide copy DSA_Verifier& operator=(const DSA_Verifier&); // and assign }; } // namespace #endif // TAO_CRYPT_DSA_HPP