From 6282aab71c9f925b533065e4dbfce632b83ee4ac Mon Sep 17 00:00:00 2001
From: weidai <weidai@57ff6487-cd31-0410-9ec3-f628ee90f5f0>
Date: Sat, 19 Jan 2013 02:20:00 +0000
Subject: add SHA-3 update DSA to FIPS 186-3 update version numbers

git-svn-id: svn://svn.code.sf.net/p/cryptopp/code/trunk/c5@535 57ff6487-cd31-0410-9ec3-f628ee90f5f0
---
 sha3.h | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 sha3.h

(limited to 'sha3.h')

diff --git a/sha3.h b/sha3.h
new file mode 100644
index 0000000..232bae5
--- /dev/null
+++ b/sha3.h
@@ -0,0 +1,65 @@
+// sha3.h - written and placed in the public domain by Wei Dai
+
+#ifndef CRYPTOPP_SHA3_H
+#define CRYPTOPP_SHA3_H
+
+#include "cryptlib.h"
+#include "secblock.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// <a href="http://en.wikipedia.org/wiki/SHA-3">SHA-3</a>
+class SHA3 : public HashTransformation
+{
+public:
+	SHA3(unsigned int digestSize) : m_digestSize(digestSize) {Restart();}
+	unsigned int DigestSize() const {return m_digestSize;}
+	std::string AlgorithmName() const {return "SHA-3-" + IntToString(m_digestSize*8);}
+	unsigned int OptimalDataAlignment() const {return GetAlignmentOf<word64>();}
+
+	void Update(const byte *input, size_t length);
+	void Restart();
+	void TruncatedFinal(byte *hash, size_t size);
+
+protected:
+	inline unsigned int r() const {return 200 - 2 * m_digestSize;}
+
+	FixedSizeSecBlock<word64, 25> m_state;
+	unsigned int m_digestSize, m_counter;
+};
+
+class SHA3_224 : public SHA3
+{
+public:
+	CRYPTOPP_CONSTANT(DIGESTSIZE = 28)
+	SHA3_224() : SHA3(DIGESTSIZE) {}
+	static const char * StaticAlgorithmName() {return "SHA-3-224";}
+};
+
+class SHA3_256 : public SHA3
+{
+public:
+	CRYPTOPP_CONSTANT(DIGESTSIZE = 32)
+	SHA3_256() : SHA3(DIGESTSIZE) {}
+	static const char * StaticAlgorithmName() {return "SHA-3-256";}
+};
+
+class SHA3_384 : public SHA3
+{
+public:
+	CRYPTOPP_CONSTANT(DIGESTSIZE = 48)
+	SHA3_384() : SHA3(DIGESTSIZE) {}
+	static const char * StaticAlgorithmName() {return "SHA-3-384";}
+};
+
+class SHA3_512 : public SHA3
+{
+public:
+	CRYPTOPP_CONSTANT(DIGESTSIZE = 64)
+	SHA3_512() : SHA3(DIGESTSIZE) {}
+	static const char * StaticAlgorithmName() {return "SHA-3-512";}
+};
+
+NAMESPACE_END
+
+#endif
-- 
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