private void HandleSpecificPacket(KexInit packet)
{
m_Logger.LogDebug("Received KexInit");
if (m_PendingExchangeContext == null)
{
m_Logger.LogDebug("Trigger re-exchange from client");
m_PendingExchangeContext = new ExchangeContext();
Send(m_KexInitServerToClient);
}
m_KexInitClientToServer = packet;
m_PendingExchangeContext.KexAlgorithm = packet.PickKexAlgorithm();
m_PendingExchangeContext.HostKeyAlgorithm = packet.PickHostKeyAlgorithm();
m_PendingExchangeContext.CipherClientToServer = packet.PickCipherClientToServer();
m_PendingExchangeContext.CipherServerToClient = packet.PickCipherServerToClient();
m_PendingExchangeContext.MACAlgorithmClientToServer = packet.PickMACAlgorithmClientToServer();
m_PendingExchangeContext.MACAlgorithmServerToClient = packet.PickMACAlgorithmServerToClient();
m_PendingExchangeContext.CompressionClientToServer = packet.PickCompressionAlgorithmClientToServer();
m_PendingExchangeContext.CompressionServerToClient = packet.PickCompressionAlgorithmServerToClient();
m_Logger.LogDebug($"Selected KexAlgorithm: {m_PendingExchangeContext.KexAlgorithm.Name}");
m_Logger.LogDebug($"Selected HostKeyAlgorithm: {m_PendingExchangeContext.HostKeyAlgorithm.Name}");
m_Logger.LogDebug($"Selected CipherClientToServer: {m_PendingExchangeContext.CipherClientToServer.Name}");
m_Logger.LogDebug($"Selected CipherServerToClient: {m_PendingExchangeContext.CipherServerToClient.Name}");
m_Logger.LogDebug($"Selected MACAlgorithmClientToServer: {m_PendingExchangeContext.MACAlgorithmClientToServer.Name}");
m_Logger.LogDebug($"Selected MACAlgorithmServerToClient: {m_PendingExchangeContext.MACAlgorithmServerToClient.Name}");
m_Logger.LogDebug($"Selected CompressionClientToServer: {m_PendingExchangeContext.CompressionClientToServer.Name}");
m_Logger.LogDebug($"Selected CompressionServerToClient: {m_PendingExchangeContext.CompressionServerToClient.Name}");
}
private void HandleSpecificPacket(NewKeys packet)
{
m_Logger.LogDebug("Received NewKeys");
m_ActiveExchangeContext = m_PendingExchangeContext;
m_PendingExchangeContext = null;
// Reset re-exchange values
m_TotalBytesTransferred = 0;
m_KeyTimeout = DateTime.UtcNow.AddHours(1);
}
private void ConsiderReExchange()
{
const long OneGB = (1024 * 1024 * 1024);
if ((m_TotalBytesTransferred > OneGB) || (m_KeyTimeout < DateTime.UtcNow))
{
// Time to get new keys!
m_TotalBytesTransferred = 0;
m_KeyTimeout = DateTime.UtcNow.AddHours(1);
m_Logger.LogDebug("Trigger re-exchange from server");
m_PendingExchangeContext = new ExchangeContext();
Send(m_KexInitServerToClient);
}
}
