md5mac.h

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#ifndef CRYPTOPP_MD5MAC_H
#define CRYPTOPP_MD5MAC_H

/** \file
*/

#include "seckey.h"
#include "iterhash.h"

NAMESPACE_BEGIN(CryptoPP)

class CRYPTOPP_NO_VTABLE MD5MAC_Base : public FixedKeyLength<16>, public IteratedHash<word32, LittleEndian, 64, MessageAuthenticationCode>
{
public:
        static std::string StaticAlgorithmName() {return "MD5-MAC";}
        enum {DIGESTSIZE = 16};

        MD5MAC_Base() {SetStateSize(DIGESTSIZE);}

        void UncheckedSetKey(const byte *userKey, unsigned int keylength);
        void TruncatedFinal(byte *mac, unsigned int size);
        unsigned int DigestSize() const {return DIGESTSIZE;}

protected:
        static void Transform (word32 *buf, const word32 *in, const word32 *key);
        void HashEndianCorrectedBlock(const word32 *data) {Transform(m_digest, data, m_key+4);}
        void Init();

        static const word32 T[12];
        FixedSizeSecBlock<word32, 12> m_key;
};

//! <a href="http://www.weidai.com/scan-mirror/mac.html#MD5-MAC">MD5-MAC</a>
DOCUMENTED_TYPEDEF(MessageAuthenticationCodeFinal<MD5MAC_Base>, MD5MAC)

NAMESPACE_END

#endif

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