public void ProcessServerHello(SessionID sid,
byte[] serverRandom, ProtocolVersion serverVersion,
TlsCipherSuite chosenSuite, TlsCompressionMethod chosenCompMethod)
{
if (m_HandshakePhase != HandshakeDataType.ClientHello)
{
throw new SslAlertException(AlertLevel.Fatal, AlertDescription.UnexpectedMessage);
}
m_Session.Id = sid;
m_Session.CompressionMethod = chosenCompMethod;
m_Session.IsResumable = false;
if (CipherSuites.IsSupported(chosenSuite))
{
m_Session.CipherSuite = chosenSuite;
m_SecurityParameters.CipherSuite = chosenSuite;
}
else
{
throw new SslAlertException(AlertLevel.Fatal, AlertDescription.HandshakeFailure);
}
/* TODO: Check for wrong version */
if (serverVersion.Major != 3 || serverVersion.Minor != 1)
{
throw new SslAlertException(AlertLevel.Fatal, AlertDescription.HandshakeFailure);
}
m_SecurityParameters.ServerRandom = serverRandom;
m_HandshakePhase = HandshakeDataType.ServerHello;
}
internal static bool IsPresent(TlsCompressionMethod cMethod)
{
foreach (TlsCompressionMethod method in m_SupportedCompressionMethods)
{
if (method == cMethod)
{
return(true);
}
}
return(false);
}
public void FillPendingStates(ProtocolVersion chosenVersion, TlsCompressionMethod compMethod, ICryptoTransform encryptor, ICryptoTransform decryptor,
KeyedHashAlgorithm clientHasher, KeyedHashAlgorithm serverHasher)
{
m_PendingReadState.ChosenVersion = chosenVersion;
m_PendingWriteState.ChosenVersion = chosenVersion;
m_PendingReadState.CryptoTransform = decryptor;
m_PendingWriteState.CryptoTransform = encryptor;
m_PendingReadState.Hasher = serverHasher;
m_PendingWriteState.Hasher = clientHasher;
m_PendingReadState.CompressionMethod = m_PendingWriteState.CompressionMethod = compMethod;
}
public ServerHello(byte[] buffer)
{
messageLength = buffer.Length;
if (data == null)
{
data = new byte[messageLength];
Array.Copy(buffer, data, messageLength);
}
int offset = 0;
int length = buffer.Length;
version = new ProtocolVersion(buffer, offset);
offset += version.Length;
length -= version.Length;
serverRandom = new byte[RandomUnit.Length];
System.Buffer.BlockCopy(buffer, offset, serverRandom, 0, serverRandom.Length);
offset += RandomUnit.Length;
length -= RandomUnit.Length;
/* Increment 1 byte for length and rt.Data[offset] bytes for size of sid */
int sidLength = (ushort)(buffer[offset]);
if (sidLength != 0)
{
sid = new SessionID(buffer, offset + 1, (ushort)(buffer[offset]));
}
offset += sidLength + 1;
length -= (sidLength + 1);
if (BitConverter.IsLittleEndian)
{
Array.Reverse(buffer, offset, 2);
}
chosenCipherSuite = (TlsCipherSuite)BitConverter.ToUInt16(buffer, offset);
offset += 2;
length -= 2;
chosenCompressionMethod = (TlsCompressionMethod)buffer[offset];
offset += 1;
length -= 1;
//TODO: Check for extensions
offset += length;
}
