diff options
Diffstat (limited to 'CryptoPP/iterhash.cpp')
-rw-r--r-- | CryptoPP/iterhash.cpp | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/CryptoPP/iterhash.cpp b/CryptoPP/iterhash.cpp deleted file mode 100644 index 1e31e9fb3..000000000 --- a/CryptoPP/iterhash.cpp +++ /dev/null @@ -1,160 +0,0 @@ -// iterhash.cpp - written and placed in the public domain by Wei Dai - -#ifndef __GNUC__ -#define CRYPTOPP_MANUALLY_INSTANTIATE_TEMPLATES -#endif - -#include "iterhash.h" -#include "misc.h" - -NAMESPACE_BEGIN(CryptoPP) - -template <class T, class BASE> void IteratedHashBase<T, BASE>::Update(const byte *input, size_t len) -{ - HashWordType oldCountLo = m_countLo, oldCountHi = m_countHi; - if ((m_countLo = oldCountLo + HashWordType(len)) < oldCountLo) - m_countHi++; // carry from low to high - m_countHi += (HashWordType)SafeRightShift<8*sizeof(HashWordType)>(len); - if (m_countHi < oldCountHi || SafeRightShift<2*8*sizeof(HashWordType)>(len) != 0) - throw HashInputTooLong(this->AlgorithmName()); - - unsigned int blockSize = this->BlockSize(); - unsigned int num = ModPowerOf2(oldCountLo, blockSize); - T* dataBuf = this->DataBuf(); - byte* data = (byte *)dataBuf; - - if (num != 0) // process left over data - { - if (num+len >= blockSize) - { - memcpy(data+num, input, blockSize-num); - HashBlock(dataBuf); - input += (blockSize-num); - len -= (blockSize-num); - num = 0; - // drop through and do the rest - } - else - { - memcpy(data+num, input, len); - return; - } - } - - // now process the input data in blocks of blockSize bytes and save the leftovers to m_data - if (len >= blockSize) - { - if (input == data) - { - assert(len == blockSize); - HashBlock(dataBuf); - return; - } - else if (IsAligned<T>(input)) - { - size_t leftOver = HashMultipleBlocks((T *)input, len); - input += (len - leftOver); - len = leftOver; - } - else - do - { // copy input first if it's not aligned correctly - memcpy(data, input, blockSize); - HashBlock(dataBuf); - input+=blockSize; - len-=blockSize; - } while (len >= blockSize); - } - - if (len && data != input) - memcpy(data, input, len); -} - -template <class T, class BASE> byte * IteratedHashBase<T, BASE>::CreateUpdateSpace(size_t &size) -{ - unsigned int blockSize = this->BlockSize(); - unsigned int num = ModPowerOf2(m_countLo, blockSize); - size = blockSize - num; - return (byte *)DataBuf() + num; -} - -template <class T, class BASE> size_t IteratedHashBase<T, BASE>::HashMultipleBlocks(const T *input, size_t length) -{ - unsigned int blockSize = this->BlockSize(); - bool noReverse = NativeByteOrderIs(this->GetByteOrder()); - T* dataBuf = this->DataBuf(); - do - { - if (noReverse) - this->HashEndianCorrectedBlock(input); - else - { - ByteReverse(dataBuf, input, this->BlockSize()); - this->HashEndianCorrectedBlock(dataBuf); - } - - input += blockSize/sizeof(T); - length -= blockSize; - } - while (length >= blockSize); - return length; -} - -template <class T, class BASE> void IteratedHashBase<T, BASE>::PadLastBlock(unsigned int lastBlockSize, byte padFirst) -{ - unsigned int blockSize = this->BlockSize(); - unsigned int num = ModPowerOf2(m_countLo, blockSize); - T* dataBuf = this->DataBuf(); - byte* data = (byte *)dataBuf; - data[num++] = padFirst; - if (num <= lastBlockSize) - memset(data+num, 0, lastBlockSize-num); - else - { - memset(data+num, 0, blockSize-num); - HashBlock(dataBuf); - memset(data, 0, lastBlockSize); - } -} - -template <class T, class BASE> void IteratedHashBase<T, BASE>::Restart() -{ - m_countLo = m_countHi = 0; - Init(); -} - -template <class T, class BASE> void IteratedHashBase<T, BASE>::TruncatedFinal(byte *digest, size_t size) -{ - this->ThrowIfInvalidTruncatedSize(size); - - T* dataBuf = this->DataBuf(); - T* stateBuf = this->StateBuf(); - unsigned int blockSize = this->BlockSize(); - ByteOrder order = this->GetByteOrder(); - - PadLastBlock(blockSize - 2*sizeof(HashWordType)); - dataBuf[blockSize/sizeof(T)-2+order] = ConditionalByteReverse(order, this->GetBitCountLo()); - dataBuf[blockSize/sizeof(T)-1-order] = ConditionalByteReverse(order, this->GetBitCountHi()); - - HashBlock(dataBuf); - - if (IsAligned<HashWordType>(digest) && size%sizeof(HashWordType)==0) - ConditionalByteReverse<HashWordType>(order, (HashWordType *)digest, stateBuf, size); - else - { - ConditionalByteReverse<HashWordType>(order, stateBuf, stateBuf, this->DigestSize()); - memcpy(digest, stateBuf, size); - } - - this->Restart(); // reinit for next use -} - -#ifdef __GNUC__ - template class IteratedHashBase<word64, HashTransformation>; - template class IteratedHashBase<word64, MessageAuthenticationCode>; - - template class IteratedHashBase<word32, HashTransformation>; - template class IteratedHashBase<word32, MessageAuthenticationCode>; -#endif - -NAMESPACE_END |