| public static ReadUInt16 ( byte buffer, int offset ) : ushort | ||
| buffer | byte | |
| offset | int | |
| return | ushort | |
public TLSMessage Read()
{
ReadComplete(_headerBuffer, 0, _headerBuffer.Length);
ContentType type = (ContentType)_headerBuffer[0];
ProtocolVersion ver;
ushort length;
if (type == ContentType.SSL20Compatible)
{
_handshakePackets.Add(new byte[] { _headerBuffer[2], _headerBuffer[3], _headerBuffer[4] });
length = (ushort)(_headerBuffer[1] - 3);
if (_headerBuffer[2] != 1)
{
throw new Exception();
}
ver = (ProtocolVersion)BitConverterBE.ReadUInt16(_headerBuffer, 3);
}
else
{
ver = (ProtocolVersion)BitConverterBE.ReadUInt16(_headerBuffer, 1);
length = BitConverterBE.ReadUInt16(_headerBuffer, 3);
}
if (ver != ProtocolVersion.SSL30 && ver != ProtocolVersion.TLS10 && ver != ProtocolVersion.TLS11 && ver != ProtocolVersion.TLS12)
{
System.Diagnostics.Debug.WriteLine(string.Format("[RecordLayer] Unknown Version {0:x4}", (ushort)ver), DEBUG_CATEGORY);
throw new Exception();
}
if (length > MaxFragmentSize)
{
throw new Exception();
}
ReadComplete(_recvBuffer, 0, length);
// SSL2.0互換ClientHelloのみ例外的な処理
if (type == ContentType.SSL20Compatible)
{
byte[] tmp = new byte[length];
Buffer.BlockCopy(_recvBuffer, 0, tmp, 0, length);
_handshakePackets.Add(tmp);
return(Handshake.ClientHello.CreateFromSSL2CompatibleData(ver, _recvBuffer, 0, length));
}
TLSMessage msg;
if (_recordType == RecordState.PlainText || _recordType == RecordState.CipherTextSendOnly)
{
msg = ReadPlainText(type, ver, 0, length);
}
else
{
msg = ReadCipherText(type, ver, 0, length);
}
Console.WriteLine("[RecordLayer] Receive {0}", msg);
return(msg);
}