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