/// <summary>
/// Reset the CTRPrng instance
/// </summary>
public void Reset()
{
if (m_rngEngine != null)
{
m_rngEngine.Dispose();
m_rngEngine = null;
}
if (m_seedGenerator != null)
{
m_seedGenerator.Dispose();
m_seedGenerator = null;
}
if (m_rngGenerator != null)
{
m_rngGenerator.Dispose();
m_rngGenerator = null;
}
m_rngEngine = GetCipher(m_engineType);
m_seedGenerator = GetSeedGenerator(m_seedType);
m_rngGenerator = new CMG(m_rngEngine, true);
if (m_seedGenerator != null)
{
m_rngGenerator.Initialize(m_seedGenerator.GetBytes(m_rngEngine.BlockSize + m_keySize));
}
else
{
m_rngGenerator.Initialize(m_stateSeed);
}
m_rngGenerator.Generate(m_byteBuffer);
m_bufferIndex = 0;
}
/// <summary>
/// Reinitialize the internal state
/// </summary>
public void Reset()
{
if (m_rndGenerator != null)
{
m_rndGenerator.Dispose();
m_rndGenerator = null;
}
int rds = m_stateSeed.Length == 48 ? 14 : 22;
RHX eng = new RHX(16, rds);
m_rndGenerator = new CMG(eng);
m_rndGenerator.Initialize(m_stateSeed);
}
/// <summary>
/// Outputs expected values for the SP20Drbg (key is 24 or 40)
/// </summary>
public string GetCTRVector()
{
CMG ctd = new CMG(new RHX());
int ksze = 48;
byte[] key = new byte[ksze];
byte[] output = new byte[1024];
for (int i = 0; i < ksze; i++)
{
key[i] = (byte)i;
}
ctd.Initialize(key);
ctd.Generate(output);
while (output.Length > 32)
{
output = Reduce(output);
}
return(HexConverter.ToString(output));
}
