1// ttmac.h - written and placed in the public domain by Kevin Springle
2
3#ifndef CRYPTOPP_TTMAC_H
4#define CRYPTOPP_TTMAC_H
5
6#include "seckey.h"
7#include "iterhash.h"
8
9NAMESPACE_BEGIN(CryptoPP)
10
11//! _
12class CRYPTOPP_NO_VTABLE TTMAC_Base : public FixedKeyLength<20>, public IteratedHash<word32, LittleEndian, 64, MessageAuthenticationCode>
13{
14public:
15	static std::string StaticAlgorithmName() {return std::string("Two-Track-MAC");}
16	CRYPTOPP_CONSTANT(DIGESTSIZE=20)
17
18	unsigned int DigestSize() const {return DIGESTSIZE;};
19	void UncheckedSetKey(const byte *userKey, unsigned int keylength, const NameValuePairs &params);
20	void TruncatedFinal(byte *mac, size_t size);
21
22protected:
23	static void Transform (word32 *digest, const word32 *X, bool last);
24	void HashEndianCorrectedBlock(const word32 *data) {Transform(m_digest, data, false);}
25	void Init();
26	word32* StateBuf() {return m_digest;}
27
28	FixedSizeSecBlock<word32, 10> m_digest;
29	FixedSizeSecBlock<word32, 5> m_key;
30};
31
32//! <a href="http://www.weidai.com/scan-mirror/mac.html#TTMAC">Two-Track-MAC</a>
33/*! 160 Bit MAC with 160 Bit Key */
34DOCUMENTED_TYPEDEF(MessageAuthenticationCodeFinal<TTMAC_Base>, TTMAC)
35
36NAMESPACE_END
37
38#endif
39