Remove cryptoppwin submodule (#754)

third_party/cryptoppwin/include/cryptopp/hmac.h

@@ -0,0 +1,80 @@
+// hmac.h - originally written and placed in the public domain by Wei Dai
+
+/// \file hmac.h
+/// \brief Classes for HMAC message authentication codes
+
+#ifndef CRYPTOPP_HMAC_H
+#define CRYPTOPP_HMAC_H
+
+#include "seckey.h"
+#include "secblock.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// \brief HMAC information
+/// \details HMAC_Base derives from VariableKeyLength and MessageAuthenticationCode
+/// \since Crypto++ 2.1
+class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE HMAC_Base : public VariableKeyLength<16, 0, INT_MAX>, public MessageAuthenticationCode
+{
+public:
+	virtual ~HMAC_Base() {}
+
+	/// \brief Construct a HMAC_Base
+	HMAC_Base() : m_innerHashKeyed(false) {}
+	void UncheckedSetKey(const byte *userKey, unsigned int keylength, const NameValuePairs &params);
+
+	void Restart();
+	void Update(const byte *input, size_t length);
+	void TruncatedFinal(byte *mac, size_t size);
+	unsigned int OptimalBlockSize() const {return const_cast<HMAC_Base*>(this)->AccessHash().OptimalBlockSize();}
+	unsigned int DigestSize() const {return const_cast<HMAC_Base*>(this)->AccessHash().DigestSize();}
+
+protected:
+	virtual HashTransformation & AccessHash() =0;
+	byte * AccessIpad() {return m_buf;}
+	byte * AccessOpad() {return m_buf + AccessHash().BlockSize();}
+	byte * AccessInnerHash() {return m_buf + 2*AccessHash().BlockSize();}
+
+private:
+	void KeyInnerHash();
+
+	SecByteBlock m_buf;
+	bool m_innerHashKeyed;
+};
+
+/// \brief HMAC
+/// \tparam T HashTransformation derived class
+/// \details HMAC derives from MessageAuthenticationCodeImpl. It calculates the HMAC using
+///   <tt>HMAC(K, text) = H(K XOR opad, H(K XOR ipad, text))</tt>.
+/// \sa <a href="http://www.weidai.com/scan-mirror/mac.html#HMAC">HMAC</a>
+/// \since Crypto++ 2.1
+template <class T>
+class HMAC : public MessageAuthenticationCodeImpl<HMAC_Base, HMAC<T> >
+{
+public:
+	CRYPTOPP_CONSTANT(DIGESTSIZE=T::DIGESTSIZE);
+	CRYPTOPP_CONSTANT(BLOCKSIZE=T::BLOCKSIZE);
+
+	virtual ~HMAC() {}
+
+	/// \brief Construct a HMAC
+	HMAC() {}
+	/// \brief Construct a HMAC
+	/// \param key the HMAC key
+	/// \param length the size of the HMAC key
+	HMAC(const byte *key, size_t length=HMAC_Base::DEFAULT_KEYLENGTH)
+		{this->SetKey(key, length);}
+
+	static std::string StaticAlgorithmName() {return std::string("HMAC(") + T::StaticAlgorithmName() + ")";}
+	std::string AlgorithmName() const {return std::string("HMAC(") + m_hash.AlgorithmName() + ")";}
+	std::string AlgorithmProvider() const {return m_hash.AlgorithmProvider();}
+
+private:
+	HashTransformation & AccessHash() {return m_hash;}
+
+	T m_hash;
+};
+
+NAMESPACE_END
+
+#endif