cbcmac.h
#ifndef CRYPTOPP_CBCMAC_H
#define CRYPTOPP_CBCMAC_H
#include "seckey.h"
#include "secblock.h"
NAMESPACE_BEGIN(CryptoPP)
//! _
class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE CBC_MAC_Base : public MessageAuthenticationCode
{
public:
CBC_MAC_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 const_cast<CBC_MAC_Base*>(this)->AccessCipher().BlockSize();}
protected:
virtual BlockCipher & AccessCipher() =0;
private:
void ProcessBuf();
SecByteBlock m_reg;
unsigned int m_counter;
};
//! <a href="http://www.weidai.com/scan-mirror/mac.html#CBC-MAC">CBC-MAC</a>
/*! Compatible with FIPS 113. T should be a class derived from BlockCipherDocumentation.
Secure only for fixed length messages. For variable length messages use CMAC or DMAC.
*/
template <class T>
class CBC_MAC : public MessageAuthenticationCodeImpl<CBC_MAC_Base, CBC_MAC<T> >, public SameKeyLengthAs<T>
{
public:
CBC_MAC() {}
CBC_MAC(const byte *key, size_t length=SameKeyLengthAs<T>::DEFAULT_KEYLENGTH)
{this->SetKey(key, length);}
static std::string StaticAlgorithmName() {return std::string("CBC-MAC(") + T::StaticAlgorithmName() + ")";}
private:
BlockCipher & AccessCipher() {return m_cipher;}
typename T::Encryption m_cipher;
};
NAMESPACE_END
#endif
MessageAuthenticationCode
interface for message authentication codes
Definition: cryptlib.h:617
SimpleKeyingInterface::SetKey
virtual void SetKey(const byte *key, size_t length, const NameValuePairs &params=g_nullNameValuePairs)
set or reset the key of this object
SecBlock< byte >
CBC_MAC_Base
_
Definition: cbcmac.h:10
CBC_MAC_Base::DigestSize
unsigned int DigestSize() const
size of the hash/digest/MAC returned by Final()
Definition: cbcmac.h:18
BlockCipher
interface for one direction (encryption or decryption) of a block cipher
Definition: cryptlib.h:603
MessageAuthenticationCodeImpl
_
Definition: seckey.h:167
HashTransformation::BlockSize
virtual unsigned int BlockSize() const
block size of underlying compression function, or 0 if not block based
Definition: cryptlib.h:559
SameKeyLengthAs
support query of key length that's the same as another class
Definition: seckey.h:114
CBC_MAC
CBC-MAC
Definition: cbcmac.h:34
NameValuePairs
interface for retrieving values given their names
Definition: cryptlib.h:224