1 files changed, 52 insertions, 0 deletions

diff --git a/lib/cryptopp/cmac.h b/lib/cryptopp/cmac.h
new file mode 100644
index 000000000..d8a1b391d
--- /dev/null
+++ b/lib/cryptopp/cmac.h
@@ -0,0 +1,52 @@
+#ifndef CRYPTOPP_CMAC_H
+#define CRYPTOPP_CMAC_H
+
+#include "seckey.h"
+#include "secblock.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! _
+class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE CMAC_Base : public MessageAuthenticationCode
+{
+public:
+	CMAC_Base() {}
+
+	void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs &params);
+	void Update(const byte *input, size_t length);
+	void TruncatedFinal(byte *mac, size_t size);
+	unsigned int DigestSize() const {return GetCipher().BlockSize();}
+	unsigned int OptimalBlockSize() const {return GetCipher().BlockSize();}
+	unsigned int OptimalDataAlignment() const {return GetCipher().OptimalDataAlignment();}
+
+protected:
+	friend class EAX_Base;
+
+	const BlockCipher & GetCipher() const {return const_cast<CMAC_Base*>(this)->AccessCipher();}
+	virtual BlockCipher & AccessCipher() =0;
+
+	void ProcessBuf();
+	SecByteBlock m_reg;
+	unsigned int m_counter;
+};
+
+/// <a href="http://www.cryptolounge.org/wiki/CMAC">CMAC</a>
+/*! Template parameter T should be a class derived from BlockCipherDocumentation, for example AES, with a block size of 8, 16, or 32 */
+template <class T>
+class CMAC : public MessageAuthenticationCodeImpl<CMAC_Base, CMAC<T> >, public SameKeyLengthAs<T>
+{
+public:
+	CMAC() {}
+	CMAC(const byte *key, size_t length=SameKeyLengthAs<T>::DEFAULT_KEYLENGTH)
+		{this->SetKey(key, length);}
+
+	static std::string StaticAlgorithmName() {return std::string("CMAC(") + T::StaticAlgorithmName() + ")";}
+
+private:
+	BlockCipher & AccessCipher() {return m_cipher;}
+	typename T::Encryption m_cipher;
+};
+
+NAMESPACE_END
+
+#endif