From 4ec1f8462de98d1ad83bd69fbc2142ee4beab620 Mon Sep 17 00:00:00 2001
From: weidai <weidai@57ff6487-cd31-0410-9ec3-f628ee90f5f0>
Date: Wed, 16 Apr 2003 00:48:47 +0000
Subject: add new algorithms (Kevin Springle)

git-svn-id: svn://svn.code.sf.net/p/cryptopp/code/trunk/c5@57 57ff6487-cd31-0410-9ec3-f628ee90f5f0
---
 ttmac.h | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 ttmac.h

(limited to 'ttmac.h')

diff --git a/ttmac.h b/ttmac.h
new file mode 100644
index 0000000..7ca7ecf
--- /dev/null
+++ b/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)
+//! <a href="http://www.eskimo.com/~weidai/scan-mirror/mac.html#Two-Track-MAC">Two-Track-MAC</a>
+/*! 160 Bit MAC with 160 Bit Key */
+
+class TTMAC_Base : public FixedKeyLength<20>, public IteratedHash<word32, LittleEndian, 64, MessageAuthenticationCode>
+{
+public:
+	static std::string StaticAlgorithmName() {return std::string("Two-Track-MAC");}
+	enum {DIGESTSIZE=20};
+
+	TTMAC_Base() : IteratedHash<word32, LittleEndian, 64, MessageAuthenticationCode>(DIGESTSIZE*2) {}
+
+	unsigned int DigestSize() const {return DIGESTSIZE;};
+	void UncheckedSetKey(const byte *userKey, unsigned int keylength);
+	void TruncatedFinal(byte *mac, unsigned int size);
+
+protected:
+	static void Transform (word32 *digest, const word32 *X, bool last);
+	void vTransform(const word32 *data) {Transform(m_digest, data, false);}
+	void Init();
+
+	FixedSizeSecBlock<word32, DIGESTSIZE> m_key;
+};
+
+//! <a href="http://www.weidai.com/scan-mirror/mac.html#TTMAC">Two-Track-MAC</a>
+typedef MessageAuthenticationCodeTemplate<TTMAC_Base> TTMAC;
+
+NAMESPACE_END
+
+#endif
-- 
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