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author | Tiger Wang <ziwei.tiger@hotmail.co.uk> | 2013-11-27 22:35:13 +0100 |
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committer | Tiger Wang <ziwei.tiger@hotmail.co.uk> | 2013-11-27 22:35:13 +0100 |
commit | a6630d32394120a78af56bc612fa3c3449283248 (patch) | |
tree | 2c791266b0f213cd56961299da8d2258b8f85d8e /lib/cryptopp/iterhash.h | |
parent | Fixed spawn point being generally in an ocean (diff) | |
parent | Voronoi-related biomegens use the new cVoronoiMap class. (diff) | |
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Diffstat (limited to 'lib/cryptopp/iterhash.h')
-rw-r--r-- | lib/cryptopp/iterhash.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/lib/cryptopp/iterhash.h b/lib/cryptopp/iterhash.h new file mode 100644 index 000000000..cce9e8211 --- /dev/null +++ b/lib/cryptopp/iterhash.h @@ -0,0 +1,106 @@ +#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 |