You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
2.6 KiB
68 lines
2.6 KiB
#ifndef CRYPTOPP_VMAC_H |
|
#define CRYPTOPP_VMAC_H |
|
|
|
#include "iterhash.h" |
|
#include "seckey.h" |
|
|
|
NAMESPACE_BEGIN(CryptoPP) |
|
|
|
/// . |
|
class VMAC_Base : public IteratedHashBase<word64, MessageAuthenticationCode> |
|
{ |
|
public: |
|
std::string AlgorithmName() const {return std::string("VMAC(") + GetCipher().AlgorithmName() + ")-" + IntToString(DigestSize()*8);} |
|
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;} |
|
|
|
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 NULL;} |
|
word64* DataBuf() {return (word64 *)m_data();} |
|
|
|
void VHASH_Update_SSE2(const word64 *data, size_t blocksRemainingInWord64, int tagPart); |
|
#if !(defined(_MSC_VER) && _MSC_VER < 1300) // can't use function template here with VC6 |
|
template <bool T_128BitTag> |
|
#endif |
|
void VHASH_Update_Template(const word64 *data, size_t blockRemainingInWord128); |
|
void VHASH_Update(const word64 *data, size_t blocksRemainingInWord128); |
|
|
|
CRYPTOPP_BLOCK_1(polyState, word64, 4*(m_is128+1)) |
|
CRYPTOPP_BLOCK_2(nhKey, word64, m_L1KeyLength/sizeof(word64) + 2*m_is128) |
|
CRYPTOPP_BLOCK_3(data, byte, m_L1KeyLength) |
|
CRYPTOPP_BLOCK_4(l3Key, word64, 2*(m_is128+1)) |
|
CRYPTOPP_BLOCK_5(nonce, byte, IVSize()) |
|
CRYPTOPP_BLOCK_6(pad, byte, IVSize()) |
|
CRYPTOPP_BLOCKS_END(6) |
|
|
|
bool m_is128, m_padCached, m_isFirstBlock; |
|
int m_L1KeyLength; |
|
}; |
|
|
|
/// <a href="http://www.cryptolounge.org/wiki/VMAC">VMAC</a> |
|
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
|
|
|