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/*
Copyright (C) 2000-2007 MySQL AB
This program 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; version 2 of the License.
This program 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; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301 USA.
*/
/* hash.hpp provides a base for digest types
*/
#ifndef TAO_CRYPT_HASH_HPP
#define TAO_CRYPT_HASH_HPP
#include "misc.hpp"
namespace TaoCrypt {
// HASH
class HASH : public virtual_base {
public:
virtual ~HASH() {}
virtual void Update(const byte*, word32) = 0;
virtual void Final(byte*) = 0;
virtual void Init() = 0;
virtual word32 getBlockSize() const = 0;
virtual word32 getDigestSize() const = 0;
};
// HASH with Transform
class HASHwithTransform : public HASH {
public:
HASHwithTransform(word32 digSz, word32 buffSz);
virtual ~HASHwithTransform() {}
virtual ByteOrder getByteOrder() const = 0;
virtual word32 getPadSize() const = 0;
virtual void Update(const byte*, word32);
virtual void Final(byte*);
word32 GetBitCountLo() const { return loLen_ << 3; }
word32 GetBitCountHi() const { return (loLen_ >> (8*sizeof(loLen_) - 3)) +
(hiLen_ << 3); }
enum { MaxDigestSz = 8, MaxBufferSz = 64 };
protected:
typedef word32 HashLengthType;
word32 buffLen_; // in bytes
HashLengthType loLen_; // length in bytes
HashLengthType hiLen_; // length in bytes
word32 digest_[MaxDigestSz];
word32 buffer_[MaxBufferSz / sizeof(word32)];
virtual void Transform() = 0;
void AddLength(word32);
};
#ifdef WORD64_AVAILABLE
// 64-bit HASH with Transform
class HASH64withTransform : public HASH {
public:
HASH64withTransform(word32 digSz, word32 buffSz);
virtual ~HASH64withTransform() {}
virtual ByteOrder getByteOrder() const = 0;
virtual word32 getPadSize() const = 0;
virtual void Update(const byte*, word32);
virtual void Final(byte*);
word32 GetBitCountLo() const { return loLen_ << 3; }
word32 GetBitCountHi() const { return (loLen_ >> (8*sizeof(loLen_) - 3)) +
(hiLen_ << 3); }
enum { MaxDigestSz = 8, MaxBufferSz = 128 };
protected:
typedef word32 HashLengthType;
word32 buffLen_; // in bytes
HashLengthType loLen_; // length in bytes
HashLengthType hiLen_; // length in bytes
word64 digest_[MaxDigestSz];
word64 buffer_[MaxBufferSz / sizeof(word64)];
virtual void Transform() = 0;
void AddLength(word32);
};
#endif // WORD64_AVAILABLE
} // namespace
#endif // TAO_CRYPT_HASH_HPP
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