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121 lines
3.4 KiB
C++
121 lines
3.4 KiB
C++
/* des.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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/* des.hpp defines DES, DES_EDE2, and DES_EDE3
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see FIPS 46-2 and FIPS 81
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*/
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#ifndef TAO_CRYPT_DES_HPP
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#define TAO_CRYPT_DES_HPP
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#include <string.h>
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#include "misc.hpp"
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#include "modes.hpp"
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namespace TaoCrypt {
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enum { DES_BLOCK_SIZE = 8 };
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// Base for all DES types
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class DES_BASE : public Mode_BASE<DES_BLOCK_SIZE> {
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public:
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enum { BLOCK_SIZE = DES_BLOCK_SIZE, KEY_SIZE = 32, BOXES = 8,
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BOX_SIZE = 64 };
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DES_BASE(CipherDir DIR, Mode MODE) : dir_(DIR), mode_(MODE) {}
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void Process(byte*, const byte*, word32);
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protected:
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CipherDir dir_;
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Mode mode_;
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private:
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DES_BASE(const DES_BASE&); // hide copy
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DES_BASE& operator=(const DES_BASE&); // and assign
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};
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// DES
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class DES : public DES_BASE {
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public:
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DES(CipherDir DIR, Mode MODE) : DES_BASE(DIR, MODE) {}
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void SetKey(const byte*, word32, CipherDir dir);
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void RawProcessBlock(word32&, word32&) const;
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void ProcessAndXorBlock(const byte*, const byte*, byte*) const;
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private:
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word32 k_[KEY_SIZE];
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};
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// DES_EDE2
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class DES_EDE2 : public DES_BASE {
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public:
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DES_EDE2(CipherDir DIR, Mode MODE)
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: DES_BASE(DIR, MODE), des1_(DIR, MODE), des2_(DIR, MODE) {}
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void SetKey(const byte*, word32, CipherDir dir);
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void ProcessAndXorBlock(const byte*, const byte*, byte*) const;
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private:
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DES des1_;
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DES des2_;
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};
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// DES_EDE3
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class DES_EDE3 : public DES_BASE {
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public:
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DES_EDE3(CipherDir DIR, Mode MODE)
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: DES_BASE(DIR, MODE), des1_(DIR, MODE), des2_(DIR, MODE),
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des3_(DIR, MODE) {}
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void SetKey(const byte*, word32, CipherDir dir);
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void ProcessAndXorBlock(const byte*, const byte*, byte*) const;
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private:
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DES des1_;
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DES des2_;
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DES des3_;
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};
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typedef BlockCipher<ENCRYPTION, DES, ECB> DES_ECB_Encryption;
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typedef BlockCipher<DECRYPTION, DES, ECB> DES_ECB_Decryption;
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typedef BlockCipher<ENCRYPTION, DES, CBC> DES_CBC_Encryption;
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typedef BlockCipher<DECRYPTION, DES, CBC> DES_CBC_Decryption;
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typedef BlockCipher<ENCRYPTION, DES_EDE2, ECB> DES_EDE2_ECB_Encryption;
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typedef BlockCipher<DECRYPTION, DES_EDE2, ECB> DES_EDE2_ECB_Decryption;
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typedef BlockCipher<ENCRYPTION, DES_EDE2, CBC> DES_EDE2_CBC_Encryption;
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typedef BlockCipher<DECRYPTION, DES_EDE2, CBC> DES_EDE2_CBC_Decryption;
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typedef BlockCipher<ENCRYPTION, DES_EDE3, ECB> DES_EDE3_ECB_Encryption;
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typedef BlockCipher<DECRYPTION, DES_EDE3, ECB> DES_EDE3_ECB_Decryption;
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typedef BlockCipher<ENCRYPTION, DES_EDE3, CBC> DES_EDE3_CBC_Encryption;
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typedef BlockCipher<DECRYPTION, DES_EDE3, CBC> DES_EDE3_CBC_Decryption;
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} // namespace
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#endif // TAO_CRYPT_DES_HPP
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