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author | weidai <weidai11@users.noreply.github.com> | 2007-04-15 22:53:41 +0000 |
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committer | weidai <weidai11@users.noreply.github.com> | 2007-04-15 22:53:41 +0000 |
commit | 20833349d12b2e871782629379d2a5e3293a5d45 (patch) | |
tree | eb5ee8d725bd43d3e87a01bcbd208db47308de41 /vmac.h | |
parent | adb4cc17003fe8584ac9a12b26e3c76aef14c5cd (diff) | |
download | cryptopp-git-20833349d12b2e871782629379d2a5e3293a5d45.tar.gz |
add VMAC draft-krovetz-vmac-00
Diffstat (limited to 'vmac.h')
-rwxr-xr-x | vmac.h | 69 |
1 files changed, 69 insertions, 0 deletions
@@ -0,0 +1,69 @@ +#ifndef CRYPTOPP_VMAC_H +#define CRYPTOPP_VMAC_H + +#include "iterhash.h" +#include "seckey.h" + +NAMESPACE_BEGIN(CryptoPP) + +#define CRYPTOPP_BLOCK_1(n, t, s) t* m_##n() {return (t *)(m_aggregate+0);} size_t SS1() {return sizeof(t)*(s);} size_t m_##n##Size() {return (s);} +#define CRYPTOPP_BLOCK_2(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS1());} size_t SS2() {return SS1()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);} +#define CRYPTOPP_BLOCK_3(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS2());} size_t SS3() {return SS2()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);} +#define CRYPTOPP_BLOCK_4(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS3());} size_t SS4() {return SS3()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);} +#define CRYPTOPP_BLOCK_5(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS4());} size_t SS5() {return SS4()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);} +#define CRYPTOPP_BLOCK_6(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS5());} size_t SS6() {return SS5()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);} +#define CRYPTOPP_BLOCK_7(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS6());} size_t SS7() {return SS6()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);} +#define CRYPTOPP_BLOCK_8(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS7());} size_t SS8() {return SS7()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);} +#define CRYPTOPP_BLOCKS_END(i) size_t SST() {return SS##i();} void AllocateBlocks() {m_aggregate.New(SST());} SecByteBlock m_aggregate; + +/// . +class VMAC_Base : public IteratedHash<word64, LittleEndian, 16, MessageAuthenticationCode> +{ +public: + std::string AlgorithmName() const {return std::string("VMAC(") + GetCipher().AlgorithmName() + ")-" + IntToString(DigestSize()*8);} + unsigned int IVSize() const {return GetCipher().BlockSize();} + void Resynchronize(const byte *IV); + void GetNextIV(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); + +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;} + + CRYPTOPP_BLOCK_1(polyKey, word64, 2) + CRYPTOPP_BLOCK_2(polyAccum, word64, 2) + CRYPTOPP_BLOCK_3(ipKey, word64, 2) + CRYPTOPP_BLOCK_4(nhAccum, word64, 2*(m_is128+1)) + CRYPTOPP_BLOCK_5(nhKey, word64, m_L1KeyLength/sizeof(word64) + 2*m_is128) + CRYPTOPP_BLOCK_6(nonce, byte, IVSize()) + CRYPTOPP_BLOCK_7(pad, byte, IVSize()) + CRYPTOPP_BLOCKS_END(7) + + int m_L1KeyLength; + size_t m_nhCount; + bool m_is128, m_padCached; +}; + +/// <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 |