{

AccessCipher().SetKey(key, length, params);

m_reg.CleanNew(AccessCipher().BlockSize());

m_counter = 0;

{

unsigned int blockSize = AccessCipher().BlockSize();

while (m_counter && length)

{

m_reg[m_counter++] ^= *input++;

if (m_counter == blockSize)

ProcessBuf();

length--;

}

if (length >= blockSize)

{

size_t leftOver = AccessCipher().AdvancedProcessBlocks(m_reg, input, m_reg, length, BlockTransformation::BT_DontIncrementInOutPointers|BlockTransformation::BT_XorInput);

input += (length - leftOver);

length = leftOver;

}

while (length--)

{

m_reg[m_counter++] ^= *input++;

if (m_counter == blockSize)

ProcessBuf();

}

{

ThrowIfInvalidTruncatedSize(size);

if (m_counter)

ProcessBuf();

memcpy(mac, m_reg, size);

memset(m_reg, 0, AccessCipher().BlockSize());

{

AccessCipher().ProcessBlock(m_reg);

m_counter = 0;