mirror of
https://github.com/shadps4-emu/ext-cryptoppwin.git
synced 2024-11-26 19:40:22 +00:00
81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
// hmac.h - originally written and placed in the public domain by Wei Dai
|
|
|
|
/// \file hmac.h
|
|
/// \brief Classes for HMAC message authentication codes
|
|
|
|
#ifndef CRYPTOPP_HMAC_H
|
|
#define CRYPTOPP_HMAC_H
|
|
|
|
#include "seckey.h"
|
|
#include "secblock.h"
|
|
|
|
NAMESPACE_BEGIN(CryptoPP)
|
|
|
|
/// \brief HMAC information
|
|
/// \details HMAC_Base derives from VariableKeyLength and MessageAuthenticationCode
|
|
/// \since Crypto++ 2.1
|
|
class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE HMAC_Base : public VariableKeyLength<16, 0, INT_MAX>, public MessageAuthenticationCode
|
|
{
|
|
public:
|
|
virtual ~HMAC_Base() {}
|
|
|
|
/// \brief Construct a HMAC_Base
|
|
HMAC_Base() : m_innerHashKeyed(false) {}
|
|
void UncheckedSetKey(const byte *userKey, unsigned int keylength, const NameValuePairs ¶ms);
|
|
|
|
void Restart();
|
|
void Update(const byte *input, size_t length);
|
|
void TruncatedFinal(byte *mac, size_t size);
|
|
unsigned int OptimalBlockSize() const {return const_cast<HMAC_Base*>(this)->AccessHash().OptimalBlockSize();}
|
|
unsigned int DigestSize() const {return const_cast<HMAC_Base*>(this)->AccessHash().DigestSize();}
|
|
|
|
protected:
|
|
virtual HashTransformation & AccessHash() =0;
|
|
byte * AccessIpad() {return m_buf;}
|
|
byte * AccessOpad() {return m_buf + AccessHash().BlockSize();}
|
|
byte * AccessInnerHash() {return m_buf + 2*AccessHash().BlockSize();}
|
|
|
|
private:
|
|
void KeyInnerHash();
|
|
|
|
SecByteBlock m_buf;
|
|
bool m_innerHashKeyed;
|
|
};
|
|
|
|
/// \brief HMAC
|
|
/// \tparam T HashTransformation derived class
|
|
/// \details HMAC derives from MessageAuthenticationCodeImpl. It calculates the HMAC using
|
|
/// <tt>HMAC(K, text) = H(K XOR opad, H(K XOR ipad, text))</tt>.
|
|
/// \sa <a href="http://www.weidai.com/scan-mirror/mac.html#HMAC">HMAC</a>
|
|
/// \since Crypto++ 2.1
|
|
template <class T>
|
|
class HMAC : public MessageAuthenticationCodeImpl<HMAC_Base, HMAC<T> >
|
|
{
|
|
public:
|
|
CRYPTOPP_CONSTANT(DIGESTSIZE=T::DIGESTSIZE);
|
|
CRYPTOPP_CONSTANT(BLOCKSIZE=T::BLOCKSIZE);
|
|
|
|
virtual ~HMAC() {}
|
|
|
|
/// \brief Construct a HMAC
|
|
HMAC() {}
|
|
/// \brief Construct a HMAC
|
|
/// \param key the HMAC key
|
|
/// \param length the size of the HMAC key
|
|
HMAC(const byte *key, size_t length=HMAC_Base::DEFAULT_KEYLENGTH)
|
|
{this->SetKey(key, length);}
|
|
|
|
static std::string StaticAlgorithmName() {return std::string("HMAC(") + T::StaticAlgorithmName() + ")";}
|
|
std::string AlgorithmName() const {return std::string("HMAC(") + m_hash.AlgorithmName() + ")";}
|
|
std::string AlgorithmProvider() const {return m_hash.AlgorithmProvider();}
|
|
|
|
private:
|
|
HashTransformation & AccessHash() {return m_hash;}
|
|
|
|
T m_hash;
|
|
};
|
|
|
|
NAMESPACE_END
|
|
|
|
#endif
|