C++ (Cpp) IncrementCounterByOne Examples

Example #1

File: modes.cpp Project: 0xmono/miranda-ng

inline void CTR_ModePolicy::ProcessMultipleBlocks(byte *output, const byte *input, size_t n)
{
	unsigned int s = BlockSize(), j = 0;
	for (unsigned int i=1; i<n; i++, j+=s)
		IncrementCounterByOne(m_counterArray + j + s, m_counterArray + j, s);
	m_cipher->ProcessAndXorMultipleBlocks(m_counterArray, input, output, n);
	IncrementCounterByOne(m_counterArray, m_counterArray + s*(n-1), s);
}

Example #2

File: modes.cpp Project: 0xmono/miranda-ng

void CTR_ModePolicy::OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount)
{
	assert(m_cipher->IsForwardTransformation());	// CTR mode needs the "encrypt" direction of the underlying block cipher, even to decrypt
	unsigned int maxBlocks = m_cipher->OptimalNumberOfParallelBlocks();
	if (maxBlocks == 1)
	{
		unsigned int sizeIncrement = BlockSize();
		while (iterationCount)
		{
			m_cipher->ProcessAndXorBlock(m_counterArray, input, output);
			IncrementCounterByOne(m_counterArray, sizeIncrement);
			output += sizeIncrement;
			input += sizeIncrement;
			iterationCount -= 1;
		}
	}
	else
	{
		unsigned int sizeIncrement = maxBlocks * BlockSize();
		while (iterationCount >= maxBlocks)
		{
			ProcessMultipleBlocks(output, input, maxBlocks);
			output += sizeIncrement;
			input += sizeIncrement;
			iterationCount -= maxBlocks;
		}
		if (iterationCount > 0)
			ProcessMultipleBlocks(output, input, iterationCount);
	}
}

Example #3

File: modes.cpp Project: gogo40/GoGo40-keygen

void CTR_ModePolicy::OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount)
{
	unsigned int maxBlocks = m_cipher->OptimalNumberOfParallelBlocks();
	if (maxBlocks == 1)
	{
		unsigned int sizeIncrement = BlockSize();
		while (iterationCount)
		{
			m_cipher->ProcessAndXorBlock(m_counterArray, input, output);
			IncrementCounterByOne(m_counterArray, sizeIncrement);
			output += sizeIncrement;
			input += sizeIncrement;
			iterationCount -= 1;
		}
	}
	else
	{
		unsigned int sizeIncrement = maxBlocks * BlockSize();
		while (iterationCount >= maxBlocks)
		{
			ProcessMultipleBlocks(output, input, maxBlocks);
			output += sizeIncrement;
			input += sizeIncrement;
			iterationCount -= maxBlocks;
		}
		if (iterationCount > 0)
			ProcessMultipleBlocks(output, input, iterationCount);
	}
}

Example #4

File: modes.cpp Project: superbitcoin/SuperBitcoin

void CTR_ModePolicy::IncrementCounterBy256()
{
	IncrementCounterByOne(m_counterArray, BlockSize()-1);
}

Example #5

File: modes.cpp Project: gogo40/GoGo40-keygen

void CTR_ModePolicy::GetNextIV(byte *IV)
{
	IncrementCounterByOne(IV, m_counterArray, BlockSize());
}