00001 #ifndef CRYPTOPP_CBCMAC_H
00002 #define CRYPTOPP_CBCMAC_H
00003
00004 #include "seckey.h"
00005 #include "secblock.h"
00006
00007 NAMESPACE_BEGIN(CryptoPP)
00008
00009
00010 class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE CBC_MAC_Base : public MessageAuthenticationCode
00011 {
00012 public:
00013 CBC_MAC_Base() {}
00014
00015 void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs ¶ms);
00016 void Update(const byte *input, size_t length);
00017 void TruncatedFinal(byte *mac, size_t size);
00018 unsigned int DigestSize() const {return const_cast<CBC_MAC_Base*>(this)->AccessCipher().BlockSize();}
00019
00020 protected:
00021 virtual BlockCipher & AccessCipher() =0;
00022
00023 private:
00024 void ProcessBuf();
00025 SecByteBlock m_reg;
00026 unsigned int m_counter;
00027 };
00028
00029
00030
00031
00032
00033 template <class T>
00034 class CBC_MAC : public MessageAuthenticationCodeImpl<CBC_MAC_Base, CBC_MAC<T> >, public SameKeyLengthAs<T>
00035 {
00036 public:
00037 CBC_MAC() {}
00038 CBC_MAC(const byte *key, size_t length=SameKeyLengthAs<T>::DEFAULT_KEYLENGTH)
00039 {this->SetKey(key, length);}
00040
00041 static std::string StaticAlgorithmName() {return std::string("CBC-MAC(") + T::StaticAlgorithmName() + ")";}
00042
00043 private:
00044 BlockCipher & AccessCipher() {return m_cipher;}
00045 typename T::Encryption m_cipher;
00046 };
00047
00048 NAMESPACE_END
00049
00050 #endif