00001
00002
00003 #ifndef CRYPTOPP_TTMAC_H
00004 #define CRYPTOPP_TTMAC_H
00005
00006 #include "seckey.h"
00007 #include "iterhash.h"
00008
00009 NAMESPACE_BEGIN(CryptoPP)
00010
00011
00012 class CRYPTOPP_NO_VTABLE TTMAC_Base : public FixedKeyLength<20>, public IteratedHash<word32, LittleEndian, 64, MessageAuthenticationCode>
00013 {
00014 public:
00015 static std::string StaticAlgorithmName() {return std::string("Two-Track-MAC");}
00016 CRYPTOPP_CONSTANT(DIGESTSIZE=20)
00017
00018 unsigned int DigestSize() const {return DIGESTSIZE;};
00019 void UncheckedSetKey(const byte *userKey, unsigned int keylength, const NameValuePairs ¶ms);
00020 void TruncatedFinal(byte *mac, size_t size);
00021
00022 protected:
00023 static void Transform (word32 *digest, const word32 *X, bool last);
00024 void HashEndianCorrectedBlock(const word32 *data) {Transform(m_digest, data, false);}
00025 void Init();
00026 word32* StateBuf() {return m_digest;}
00027
00028 FixedSizeSecBlock<word32, 10> m_digest;
00029 FixedSizeSecBlock<word32, 5> m_key;
00030 };
00031
00032
00033
00034 DOCUMENTED_TYPEDEF(MessageAuthenticationCodeFinal<TTMAC_Base>, TTMAC)
00035
00036 NAMESPACE_END
00037
00038 #endif