#ifndef CRYPTOPP_SHA_H
#define CRYPTOPP_SHA_H

#include "iterhash.h"

NAMESPACE_BEGIN(CryptoPP)

/// <a href="http://www.weidai.com/scan-mirror/md.html#SHA-1">SHA-1</a>
class CRYPTOPP_DLL SHA1 : public IteratedHashWithStaticTransform<word32, BigEndian, 64, 20, SHA1>
{
public:
	static void CRYPTOPP_API InitState(HashWordType *state);
	static void CRYPTOPP_API Transform(word32 *digest, const word32 *data);
	static const char * CRYPTOPP_API StaticAlgorithmName() {return "SHA-1";}
};

typedef SHA1 SHA;	// for backwards compatibility

//! implements the SHA-256 standard
class CRYPTOPP_DLL SHA256 : public IteratedHashWithStaticTransform<word32, BigEndian, 64, 32, SHA256>
{
public:
	static void CRYPTOPP_API InitState(HashWordType *state);
	static void CRYPTOPP_API Transform(word32 *digest, const word32 *data);
	static const char * CRYPTOPP_API StaticAlgorithmName() {return "SHA-256";}

protected:
	static const word32 K[64];
};

//! implements the SHA-224 standard
class CRYPTOPP_DLL SHA224 : public IteratedHashWithStaticTransform<word32, BigEndian, 64, 32, SHA224, 28>
{
public:
	static void CRYPTOPP_API InitState(HashWordType *state);
	static void CRYPTOPP_API Transform(word32 *digest, const word32 *data) {SHA256::Transform(digest, data);}
	static const char * CRYPTOPP_API StaticAlgorithmName() {return "SHA-224";}
};

#ifdef WORD64_AVAILABLE

//! implements the SHA-512 standard
class CRYPTOPP_DLL SHA512 : public IteratedHashWithStaticTransform<word64, BigEndian, 128, 64, SHA512>
{
public:
	static void CRYPTOPP_API InitState(HashWordType *state);
	static void CRYPTOPP_API Transform(word64 *digest, const word64 *data);
	static const char * CRYPTOPP_API StaticAlgorithmName() {return "SHA-512";}

protected:
	static const word64 K[80];
};

//! implements the SHA-384 standard
class CRYPTOPP_DLL SHA384 : public IteratedHashWithStaticTransform<word64, BigEndian, 128, 64, SHA384, 48>
{
public:
	static void CRYPTOPP_API InitState(HashWordType *state);
	static void CRYPTOPP_API Transform(word64 *digest, const word64 *data) {SHA512::Transform(digest, data);}
	static const char * CRYPTOPP_API StaticAlgorithmName() {return "SHA-384";}
};

#endif

NAMESPACE_END

#endif
