public virtual DtlsTransport Connect(TlsClient client, DatagramTransport transport)
{
if (client == null)
{
throw new ArgumentNullException("client");
}
if (transport == null)
{
throw new ArgumentNullException("transport");
}
SecurityParameters securityParameters = new SecurityParameters();
securityParameters.entity = ConnectionEnd.client;
ClientHandshakeState state = new ClientHandshakeState();
state.client = client;
state.clientContext = new TlsClientContextImpl(mSecureRandom, securityParameters);
securityParameters.clientRandom = TlsProtocol.CreateRandomBlock(client.ShouldUseGmtUnixTime(),
state.clientContext.NonceRandomGenerator);
client.Init(state.clientContext);
DtlsRecordLayer recordLayer = new DtlsRecordLayer(transport, state.clientContext, client, ContentType.handshake);
TlsSession sessionToResume = state.client.GetSessionToResume();
if (sessionToResume != null && sessionToResume.IsResumable)
{
SessionParameters sessionParameters = sessionToResume.ExportSessionParameters();
if (sessionParameters != null)
{
state.tlsSession = sessionToResume;
state.sessionParameters = sessionParameters;
}
}
try
{
return(ClientHandshake(state, recordLayer));
}
catch (TlsFatalAlert fatalAlert)
{
recordLayer.Fail(fatalAlert.AlertDescription);
throw fatalAlert;
}
catch (IOException e)
{
recordLayer.Fail(AlertDescription.internal_error);
throw e;
}
catch (Exception e)
{
recordLayer.Fail(AlertDescription.internal_error);
throw new TlsFatalAlert(AlertDescription.internal_error, e);
}
}
public virtual DtlsTransport Accept(TlsServer server, DatagramTransport transport)
{
if (server == null)
{
throw new ArgumentNullException("server");
}
if (transport == null)
{
throw new ArgumentNullException("transport");
}
SecurityParameters securityParameters = new SecurityParameters();
securityParameters.entity = ConnectionEnd.server;
ServerHandshakeState state = new ServerHandshakeState();
state.server = server;
state.serverContext = new TlsServerContextImpl(mSecureRandom, securityParameters);
securityParameters.serverRandom = TlsProtocol.CreateRandomBlock(server.ShouldUseGmtUnixTime(),
state.serverContext.NonceRandomGenerator);
server.Init(state.serverContext);
DtlsRecordLayer recordLayer = new DtlsRecordLayer(transport, state.serverContext, server, ContentType.handshake);
// TODO Need to handle sending of HelloVerifyRequest without entering a full connection
try
{
return(ServerHandshake(state, recordLayer));
}
catch (TlsFatalAlert fatalAlert)
{
recordLayer.Fail(fatalAlert.AlertDescription);
throw fatalAlert;
}
catch (IOException e)
{
recordLayer.Fail(AlertDescription.internal_error);
throw e;
}
catch (Exception e)
{
recordLayer.Fail(AlertDescription.internal_error);
throw new TlsFatalAlert(AlertDescription.internal_error, e);
}
}
public virtual int Receive(byte[] buf, int off, int len, int waitMillis)
{
try
{
return(mRecordLayer.Receive(buf, off, len, waitMillis));
}
catch (TlsFatalAlert fatalAlert)
{
mRecordLayer.Fail(fatalAlert.AlertDescription);
throw fatalAlert;
}
catch (IOException e)
{
mRecordLayer.Fail(AlertDescription.internal_error);
throw e;
}
catch (Exception e)
{
mRecordLayer.Fail(AlertDescription.internal_error);
throw new TlsFatalAlert(AlertDescription.internal_error, e);
}
}