private ServerHello(HandshakeRandom random,
Cipher cipher,
SessionId sessionId,
MemoryBuffer payload)
{
Random = random;
Cipher = cipher;
SessionId = sessionId;
Payload = payload;
}
private ClientHello(HandshakeRandom random,
CipherSuite cipherSuite,
SessionId sessionId,
MemoryBuffer payload)
{
Random = random;
CipherSuite = cipherSuite;
SessionId = sessionId;
Payload = payload;
}
public static CursorHandshakeWritingContext StartWriting(MemoryCursor cursor,
HandshakeRandom random,
Cipher cipher,
SessionId sessionId)
{
HandshakeType.ServerHello.WriteBytes(cursor);
var payloadContext = HandshakeLength.StartWriting(cursor);
ProtocolVersion.Tls12.WriteBytes(cursor);
random.WriteBytes(cursor);
sessionId.WriteBytes(cursor);
cipher.WriteBytes(cursor);
CompressionMethod.WriteEmptyValue(cursor);
var extensionsContext = ByteVector.StartVectorWriting(cursor, 0..ushort.MaxValue);
return(new CursorHandshakeWritingContext(payloadContext, extensionsContext));
}
public static CursorHandshakeWritingContext StartWriting(MemoryCursor cursor,
HandshakeRandom random,
ReadOnlyMemory <Cipher> ciphers,
SessionId sessionId)
{
HandshakeType.ClientHello.WriteBytes(cursor);
var payloadContext = HandshakeLength.StartWriting(cursor);
ProtocolVersion.Tls12.WriteBytes(cursor);
random.WriteBytes(cursor);
sessionId.WriteBytes(cursor);
CipherSuite.Write(cursor, ciphers);
CompressionMethod.WriteEmptyList(cursor);
var extensionsContext = ByteVector.StartVectorWriting(cursor, 0..ushort.MaxValue);
return(new CursorHandshakeWritingContext(payloadContext, extensionsContext));
}
public static bool TryParse(MemoryCursor cursor, out ServerHello result)
{
result = new ServerHello();
if (!HandshakeType.TrySlice(cursor, HandshakeType.ServerHello))
{
return(false);
}
using (HandshakeLength.SliceBytes(cursor).SetCursor(cursor))
{
if (!ProtocolVersion.TrySlice(cursor, ProtocolVersion.Tls12))
{
throw new EncodingException();
}
var random = HandshakeRandom.Parse(cursor);
var sessionId = SessionId.Parse(cursor);
var cipher = Cipher.Parse(cursor);
if (!CompressionMethod.TrySliceEmptyValue(cursor))
{
throw new EncodingException();
}
var payload = ByteVector.SliceVectorBytes(cursor, 0..ushort.MaxValue);
if (!cursor.IsEnd())
{
throw new EncodingException();
}
result = new ServerHello(random, cipher, sessionId, payload);
return(true);
}
}
