1
#ifndef CRYPTOPP_VMAC_H
2
#define CRYPTOPP_VMAC_H
7
NAMESPACE_BEGIN(CryptoPP)
10
class VMAC_Base : public IteratedHashBase<word64, MessageAuthenticationCode>
13
std::string AlgorithmName() const {return std::string("VMAC(") + GetCipher().AlgorithmName() + ")-" + IntToString(DigestSize()*8);}
14
unsigned int IVSize() const {return GetCipher().BlockSize();}
15
unsigned int MinIVLength() const {return 1;}
16
void Resynchronize(const byte *nonce, int length=-1);
17
void GetNextIV(RandomNumberGenerator &rng, byte *IV);
18
unsigned int DigestSize() const {return m_is128 ? 16 : 8;};
19
void UncheckedSetKey(const byte *userKey, unsigned int keylength, const NameValuePairs ¶ms);
20
void TruncatedFinal(byte *mac, size_t size);
21
unsigned int BlockSize() const {return m_L1KeyLength;}
22
ByteOrder GetByteOrder() const {return LITTLE_ENDIAN_ORDER;}
25
virtual BlockCipher & AccessCipher() =0;
26
virtual int DefaultDigestSize() const =0;
27
const BlockCipher & GetCipher() const {return const_cast<VMAC_Base *>(this)->AccessCipher();}
28
void HashEndianCorrectedBlock(const word64 *data);
29
size_t HashMultipleBlocks(const word64 *input, size_t length);
31
word64* StateBuf() {return NULL;}
32
word64* DataBuf() {return (word64 *)m_data();}
34
void VHASH_Update_SSE2(const word64 *data, size_t blocksRemainingInWord64, int tagPart);
35
#if !(defined(_MSC_VER) && _MSC_VER < 1300) // can't use function template here with VC6
36
template <bool T_128BitTag>
38
void VHASH_Update_Template(const word64 *data, size_t blockRemainingInWord128);
39
void VHASH_Update(const word64 *data, size_t blocksRemainingInWord128);
41
CRYPTOPP_BLOCK_1(polyState, word64, 4*(m_is128+1))
42
CRYPTOPP_BLOCK_2(nhKey, word64, m_L1KeyLength/sizeof(word64) + 2*m_is128)
43
CRYPTOPP_BLOCK_3(data, byte, m_L1KeyLength)
44
CRYPTOPP_BLOCK_4(l3Key, word64, 2*(m_is128+1))
45
CRYPTOPP_BLOCK_5(nonce, byte, IVSize())
46
CRYPTOPP_BLOCK_6(pad, byte, IVSize())
47
CRYPTOPP_BLOCKS_END(6)
49
bool m_is128, m_padCached, m_isFirstBlock;
53
/// <a href="http://www.cryptolounge.org/wiki/VMAC">VMAC</a>
54
template <class T_BlockCipher, int T_DigestBitSize = 128>
55
class VMAC : public SimpleKeyingInterfaceImpl<VMAC_Base, SameKeyLengthAs<T_BlockCipher, SimpleKeyingInterface::UNIQUE_IV, T_BlockCipher::BLOCKSIZE> >
58
static std::string StaticAlgorithmName() {return std::string("VMAC(") + T_BlockCipher::StaticAlgorithmName() + ")-" + IntToString(T_DigestBitSize);}
61
BlockCipher & AccessCipher() {return m_cipher;}
62
int DefaultDigestSize() const {return T_DigestBitSize/8;}
63
typename T_BlockCipher::Encryption m_cipher;