mirror of
https://github.com/shadps4-emu/ext-cryptopp.git
synced 2024-11-23 01:49:41 +00:00
92 lines
3.8 KiB
C++
92 lines
3.8 KiB
C++
// vmac.h - originally written and placed in the public domain by Wei Dai
|
|
|
|
/// \file vmac.h
|
|
/// \brief Classes for the VMAC message authentication code
|
|
/// \since Crypto++ 5.5
|
|
|
|
#ifndef CRYPTOPP_VMAC_H
|
|
#define CRYPTOPP_VMAC_H
|
|
|
|
#include "cryptlib.h"
|
|
#include "iterhash.h"
|
|
#include "seckey.h"
|
|
|
|
// Clang 3.3 integrated assembler crash on Linux. Clang 3.4 due to compiler
|
|
// error with .intel_syntax, http://llvm.org/bugs/show_bug.cgi?id=24232
|
|
#if CRYPTOPP_BOOL_X32 || defined(CRYPTOPP_DISABLE_MIXED_ASM)
|
|
# define CRYPTOPP_DISABLE_VMAC_ASM 1
|
|
#endif
|
|
|
|
NAMESPACE_BEGIN(CryptoPP)
|
|
|
|
/// \brief VMAC message authentication code base class
|
|
/// \since Crypto++ 5.5
|
|
class VMAC_Base : public IteratedHashBase<word64, MessageAuthenticationCode>
|
|
{
|
|
public:
|
|
std::string AlgorithmName() const {return std::string("VMAC(") + GetCipher().AlgorithmName() + ")-" + IntToString(DigestSize()*8);}
|
|
std::string AlgorithmProvider() const {return GetCipher().AlgorithmProvider();}
|
|
unsigned int IVSize() const {return GetCipher().BlockSize();}
|
|
unsigned int MinIVLength() const {return 1;}
|
|
void Resynchronize(const byte *nonce, int length=-1);
|
|
void GetNextIV(RandomNumberGenerator &rng, byte *IV);
|
|
unsigned int DigestSize() const {return m_is128 ? 16 : 8;};
|
|
void UncheckedSetKey(const byte *userKey, unsigned int keylength, const NameValuePairs ¶ms);
|
|
void TruncatedFinal(byte *mac, size_t size);
|
|
unsigned int BlockSize() const {return m_L1KeyLength;}
|
|
ByteOrder GetByteOrder() const {return LITTLE_ENDIAN_ORDER;}
|
|
unsigned int OptimalDataAlignment() const;
|
|
|
|
protected:
|
|
virtual BlockCipher & AccessCipher() =0;
|
|
virtual int DefaultDigestSize() const =0;
|
|
const BlockCipher & GetCipher() const {return const_cast<VMAC_Base *>(this)->AccessCipher();}
|
|
void HashEndianCorrectedBlock(const word64 *data);
|
|
size_t HashMultipleBlocks(const word64 *input, size_t length);
|
|
void Init() {}
|
|
word64* StateBuf() {return NULLPTR;}
|
|
word64* DataBuf() {return (word64 *)(void*)m_data();}
|
|
|
|
void VHASH_Update_SSE2(const word64 *data, size_t blocksRemainingInWord64, int tagPart);
|
|
template <bool T_128BitTag>
|
|
void VHASH_Update_Template(const word64 *data, size_t blockRemainingInWord128);
|
|
void VHASH_Update(const word64 *data, size_t blocksRemainingInWord128);
|
|
|
|
CRYPTOPP_BLOCK_1(polyState, word64, (m_is128 ? 8 : 4))
|
|
CRYPTOPP_BLOCK_2(nhKey, word64, m_L1KeyLength/sizeof(word64) + 2*m_is128)
|
|
CRYPTOPP_BLOCK_3(data, byte, m_L1KeyLength)
|
|
CRYPTOPP_BLOCK_4(l3Key, word64, (m_is128 ? 4 : 2))
|
|
CRYPTOPP_BLOCK_5(nonce, byte, IVSize())
|
|
CRYPTOPP_BLOCK_6(pad, byte, IVSize())
|
|
CRYPTOPP_BLOCKS_END(6)
|
|
|
|
bool m_is128, m_padCached, m_isFirstBlock;
|
|
unsigned int m_L1KeyLength;
|
|
};
|
|
|
|
/// \brief VMAC message authentication code
|
|
/// \tparam T_BlockCipher block cipher
|
|
/// \tparam T_DigestBitSize digest size, in bits
|
|
/// \details VMAC is a block cipher-based message authentication code algorithm
|
|
/// using a universal hash proposed by Ted Krovetz and Wei Dai in April 2007. The
|
|
/// algorithm was designed for high performance backed by a formal analysis.
|
|
/// \details The implementation is based on Ted Krovetz's public domain vmac.c
|
|
/// and <a href="http://tools.ietf.org/html/draft-krovetz-vmac-01">draft-krovetz-vmac-01.txt</a>.
|
|
/// \sa <a href="http://www.cryptolounge.org/wiki/VMAC">VMAC</a>.
|
|
/// \since Crypto++ 5.5
|
|
template <class T_BlockCipher, int T_DigestBitSize = 128>
|
|
class VMAC : public SimpleKeyingInterfaceImpl<VMAC_Base, SameKeyLengthAs<T_BlockCipher, SimpleKeyingInterface::UNIQUE_IV, T_BlockCipher::BLOCKSIZE> >
|
|
{
|
|
public:
|
|
static std::string StaticAlgorithmName() {return std::string("VMAC(") + T_BlockCipher::StaticAlgorithmName() + ")-" + IntToString(T_DigestBitSize);}
|
|
|
|
private:
|
|
BlockCipher & AccessCipher() {return m_cipher;}
|
|
int DefaultDigestSize() const {return T_DigestBitSize/8;}
|
|
typename T_BlockCipher::Encryption m_cipher;
|
|
};
|
|
|
|
NAMESPACE_END
|
|
|
|
#endif
|