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+/*
+ Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
+
+ 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