Method Update

src/cryptopp/cbcmac.cpp:16–41

}

void CBC_MAC_Base::Update(const byte *input, size_t length)
{
	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();
	}
}

void CBC_MAC_Base::TruncatedFinal(byte *mac, size_t size)
{