00001
00002
00003 #ifndef CRYPTOPP_TTMAC_H
00004 #define CRYPTOPP_TTMAC_H
00005
00006 #include "seckey.h"
00007 #include "iterhash.h"
00008 #include "secblock.h"
00009
00010 NAMESPACE_BEGIN(CryptoPP)
00011
00012
00013 class CRYPTOPP_NO_VTABLE TTMAC_Base : public FixedKeyLength<20>, public IteratedHash<word32, LittleEndian, 64, MessageAuthenticationCode>
00014 {
00015 public:
00016 static std::string StaticAlgorithmName() {return std::string("Two-Track-MAC");}
00017 CRYPTOPP_CONSTANT(DIGESTSIZE=20)
00018
00019 unsigned int DigestSize() const {return DIGESTSIZE;};
00020 void UncheckedSetKey(const byte *userKey, unsigned int keylength, const NameValuePairs ¶ms);
00021 void TruncatedFinal(byte *mac, size_t size);
00022
00023 protected:
00024 static void Transform (word32 *digest, const word32 *X, bool last);
00025 void HashEndianCorrectedBlock(const word32 *data) {Transform(m_digest, data, false);}
00026 void Init();
00027 word32* StateBuf() {return m_digest;}
00028
00029 FixedSizeSecBlock<word32, 10> m_digest;
00030 FixedSizeSecBlock<word32, 5> m_key;
00031 };
00032
00033
00034
00035 DOCUMENTED_TYPEDEF(MessageAuthenticationCodeFinal<TTMAC_Base>, TTMAC)
00036
00037 NAMESPACE_END
00038
00039 #endif