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