public void SetServerHello(TlsPacket.TlsServerHello serverHello, TlsPacketContext packetContext)
{
m_tlsDecoder.ProtocolVersion = TlsSecurityParameters.GetSslProtocolVersion(serverHello.Version.Major, serverHello.Version.Minor);
m_tlsDecoder.ServerRandom = ByteString.Combine(serverHello.Random.RandomTime, serverHello.Random.RandomBytes);
m_tlsDecoder.CipherSuite = (TlsCipherSuite)serverHello.CipherSuite.CipherId;
m_tlsDecoder.Compression = serverHello.CompressionMethod;
}
public void SetServerHello(TlsPacket.TlsServerHello serverHello, TlsPacketContext packetContext)
{
m_conversationModel.Version = TlsSecurityParameters.GetSslProtocolVersion(serverHello.Version.Major, serverHello.Version.Minor).ToString();
m_conversationModel.SessionId = ByteString.ByteArrayToString(serverHello.SessionId.Sid);
m_conversationModel.ServerRandom = ByteString.ByteArrayToString(serverHello.Random.RandomBytes);
m_conversationModel.ServerCipherSuite = $"{(TlsCipherSuite)serverHello.CipherSuite.CipherId}";
m_conversationModel.ServerExtensions = GetExtensions(serverHello.Extensions);
}
static void Main(string[] args)
{
if (args.Length != 2)
{
PrintUsage();
return;
}
var modelContext = TlsConversationContext.CreateInMemory();
if (String.Equals("extract", args[0], StringComparison.InvariantCultureIgnoreCase))
{
var filepath = args[1];
var frameKeyProvider = new FrameKeyProvider();
var keyFile = Path.ChangeExtension(filepath, "key");
var secretMap = File.Exists(keyFile) ? TlsMasterSecretMap.LoadFromFile(keyFile): new TlsMasterSecretMap();
var packets = FastPcapFileReaderDevice.ReadAll(args[1]).Select((p, i) => (Key: frameKeyProvider.GetKey(p), Value: (Meta: new PacketMeta {
Number = i + 1, Timestamp = p.Timestamp
}, Packet: p)));
var flows = from packet in packets
group packet by packet.Key;
var conversations = TcpStreamConversation.CreateConversations(flows.ToDictionary(x => x.Key, x => x.Select(y => y.Value)));
foreach (var conversation in conversations)
{
var modelBuilder = new TlsConversationModelBuilder(modelContext);
var decoderBuilder = new TlsDecoderBuilder();
var processor = new TlsSessionProcessor(modelBuilder, decoderBuilder);
processor.ProcessConversation(conversation);
var model = modelBuilder.ToModel();
modelContext.SaveChanges();
var tlsDecoder = decoderBuilder.ToDecoder();
var masterSecret = secretMap.GetMasterSecret(ByteString.ByteArrayToString(tlsDecoder.ClientRandom));
if (masterSecret != null)
{
tlsDecoder.MasterSecret = ByteString.StringToByteArray(masterSecret);
var tlsSecurityParameters = TlsSecurityParameters.Create(tlsDecoder.ProtocolVersion, tlsDecoder.CipherSuite.ToString(), tlsDecoder.Compression);
tlsDecoder.InitializeKeyBlock(tlsSecurityParameters);
// USE TLS DECODER
DumpConversationContent(tlsDecoder, conversation, processor.ClientDataRecords, processor.ServerDataRecords);
}
}
CsvFeatureWriter.WriteCsv(Path.ChangeExtension(filepath, "csv"), modelContext);
}
}
