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-rw-r--r--lib/cryptopp/iterhash.h106
1 files changed, 106 insertions, 0 deletions
diff --git a/lib/cryptopp/iterhash.h b/lib/cryptopp/iterhash.h
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+++ b/lib/cryptopp/iterhash.h
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+#ifndef CRYPTOPP_ITERHASH_H
+#define CRYPTOPP_ITERHASH_H
+
+#include "cryptlib.h"
+#include "secblock.h"
+#include "misc.h"
+#include "simple.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! exception thrown when trying to hash more data than is allowed by a hash function
+class CRYPTOPP_DLL HashInputTooLong : public InvalidDataFormat
+{
+public:
+ explicit HashInputTooLong(const std::string &alg)
+ : InvalidDataFormat("IteratedHashBase: input data exceeds maximum allowed by hash function " + alg) {}
+};
+
+//! _
+template <class T, class BASE>
+class CRYPTOPP_NO_VTABLE IteratedHashBase : public BASE
+{
+public:
+ typedef T HashWordType;
+
+ IteratedHashBase() : m_countLo(0), m_countHi(0) {}
+ unsigned int OptimalBlockSize() const {return this->BlockSize();}
+ unsigned int OptimalDataAlignment() const {return GetAlignmentOf<T>();}
+ void Update(const byte *input, size_t length);
+ byte * CreateUpdateSpace(size_t &size);
+ void Restart();
+ void TruncatedFinal(byte *digest, size_t size);
+
+protected:
+ inline T GetBitCountHi() const {return (m_countLo >> (8*sizeof(T)-3)) + (m_countHi << 3);}
+ inline T GetBitCountLo() const {return m_countLo << 3;}
+
+ void PadLastBlock(unsigned int lastBlockSize, byte padFirst=0x80);
+ virtual void Init() =0;
+
+ virtual ByteOrder GetByteOrder() const =0;
+ virtual void HashEndianCorrectedBlock(const HashWordType *data) =0;
+ virtual size_t HashMultipleBlocks(const T *input, size_t length);
+ void HashBlock(const HashWordType *input) {HashMultipleBlocks(input, this->BlockSize());}
+
+ virtual T* DataBuf() =0;
+ virtual T* StateBuf() =0;
+
+private:
+ T m_countLo, m_countHi;
+};
+
+//! _
+template <class T_HashWordType, class T_Endianness, unsigned int T_BlockSize, class T_Base = HashTransformation>
+class CRYPTOPP_NO_VTABLE IteratedHash : public IteratedHashBase<T_HashWordType, T_Base>
+{
+public:
+ typedef T_Endianness ByteOrderClass;
+ typedef T_HashWordType HashWordType;
+
+ CRYPTOPP_CONSTANT(BLOCKSIZE = T_BlockSize)
+ // BCB2006 workaround: can't use BLOCKSIZE here
+ CRYPTOPP_COMPILE_ASSERT((T_BlockSize & (T_BlockSize - 1)) == 0); // blockSize is a power of 2
+ unsigned int BlockSize() const {return T_BlockSize;}
+
+ ByteOrder GetByteOrder() const {return T_Endianness::ToEnum();}
+
+ inline static void CorrectEndianess(HashWordType *out, const HashWordType *in, size_t byteCount)
+ {
+ ConditionalByteReverse(T_Endianness::ToEnum(), out, in, byteCount);
+ }
+
+protected:
+ T_HashWordType* DataBuf() {return this->m_data;}
+ FixedSizeSecBlock<T_HashWordType, T_BlockSize/sizeof(T_HashWordType)> m_data;
+};
+
+//! _
+template <class T_HashWordType, class T_Endianness, unsigned int T_BlockSize, unsigned int T_StateSize, class T_Transform, unsigned int T_DigestSize = 0, bool T_StateAligned = false>
+class CRYPTOPP_NO_VTABLE IteratedHashWithStaticTransform
+ : public ClonableImpl<T_Transform, AlgorithmImpl<IteratedHash<T_HashWordType, T_Endianness, T_BlockSize>, T_Transform> >
+{
+public:
+ CRYPTOPP_CONSTANT(DIGESTSIZE = T_DigestSize ? T_DigestSize : T_StateSize)
+ unsigned int DigestSize() const {return DIGESTSIZE;};
+
+protected:
+ IteratedHashWithStaticTransform() {this->Init();}
+ void HashEndianCorrectedBlock(const T_HashWordType *data) {T_Transform::Transform(this->m_state, data);}
+ void Init() {T_Transform::InitState(this->m_state);}
+
+ T_HashWordType* StateBuf() {return this->m_state;}
+ FixedSizeAlignedSecBlock<T_HashWordType, T_BlockSize/sizeof(T_HashWordType), T_StateAligned> m_state;
+};
+
+#ifndef __GNUC__
+ CRYPTOPP_DLL_TEMPLATE_CLASS IteratedHashBase<word64, HashTransformation>;
+ CRYPTOPP_STATIC_TEMPLATE_CLASS IteratedHashBase<word64, MessageAuthenticationCode>;
+
+ CRYPTOPP_DLL_TEMPLATE_CLASS IteratedHashBase<word32, HashTransformation>;
+ CRYPTOPP_STATIC_TEMPLATE_CLASS IteratedHashBase<word32, MessageAuthenticationCode>;
+#endif
+
+NAMESPACE_END
+
+#endif