1 files changed, 38 insertions, 0 deletions

diff --git a/lib/cryptopp/ttmac.h b/lib/cryptopp/ttmac.h
new file mode 100644
index 000000000..b4bf86e26
--- /dev/null
+++ b/lib/cryptopp/ttmac.h
@@ -0,0 +1,38 @@
+// ttmac.h - written and placed in the public domain by Kevin Springle
+
+#ifndef CRYPTOPP_TTMAC_H
+#define CRYPTOPP_TTMAC_H
+
+#include "seckey.h"
+#include "iterhash.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! _
+class CRYPTOPP_NO_VTABLE TTMAC_Base : public FixedKeyLength<20>, public IteratedHash<word32, LittleEndian, 64, MessageAuthenticationCode>
+{
+public:
+	static std::string StaticAlgorithmName() {return std::string("Two-Track-MAC");}
+	CRYPTOPP_CONSTANT(DIGESTSIZE=20)
+
+	unsigned int DigestSize() const {return DIGESTSIZE;};
+	void UncheckedSetKey(const byte *userKey, unsigned int keylength, const NameValuePairs &params);
+	void TruncatedFinal(byte *mac, size_t size);
+
+protected:
+	static void Transform (word32 *digest, const word32 *X, bool last);
+	void HashEndianCorrectedBlock(const word32 *data) {Transform(m_digest, data, false);}
+	void Init();
+	word32* StateBuf() {return m_digest;}
+
+	FixedSizeSecBlock<word32, 10> m_digest;
+	FixedSizeSecBlock<word32, 5> m_key;
+};
+
+//! <a href="http://www.weidai.com/scan-mirror/mac.html#TTMAC">Two-Track-MAC</a>
+/*! 160 Bit MAC with 160 Bit Key */
+DOCUMENTED_TYPEDEF(MessageAuthenticationCodeFinal<TTMAC_Base>, TTMAC)
+
+NAMESPACE_END
+
+#endif