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