/**
* Parse a {@link HeartbeatMessage} from a {@link Stream}.
*
* @param input
* the {@link Stream} to parse from.
* @return a {@link HeartbeatMessage} object.
* @throws IOException
*/
public static HeartbeatMessage Parse(Stream input)
{
byte type = TlsUtilities.ReadUint8(input);
if (!HeartbeatMessageType.IsValid(type))
{
throw new TlsFatalAlert(AlertDescription.illegal_parameter);
}
int payload_length = TlsUtilities.ReadUint16(input);
PayloadBuffer buf = new PayloadBuffer();
Streams.PipeAll(input, buf);
byte[] payload = buf.ToTruncatedByteArray(payload_length);
if (payload == null)
{
/*
* RFC 6520 4. If the payload_length of a received HeartbeatMessage is too large, the
* received HeartbeatMessage MUST be discarded silently.
*/
return(null);
}
TlsUtilities.CheckUint16(buf.Length);
int padding_length = (int)buf.Length - payload.Length;
/*
* RFC 6520 4. The padding of a received HeartbeatMessage message MUST be ignored
*/
return(new HeartbeatMessage(type, payload, padding_length));
}
/**
* Parse a {@link HeartbeatMessage} from a {@link Stream}.
*
* @param input
* the {@link Stream} to parse from.
* @return a {@link HeartbeatMessage} object.
* @throws IOException
*/
public static HeartbeatMessage Parse(Stream input)
{
byte type = TlsUtilities.ReadUint8(input);
if (!HeartbeatMessageType.IsValid(type))
throw new TlsFatalAlert(AlertDescription.illegal_parameter);
int payload_length = TlsUtilities.ReadUint16(input);
PayloadBuffer buf = new PayloadBuffer();
Streams.PipeAll(input, buf);
byte[] payload = buf.ToTruncatedByteArray(payload_length);
if (payload == null)
{
/*
* RFC 6520 4. If the payload_length of a received HeartbeatMessage is too large, the
* received HeartbeatMessage MUST be discarded silently.
*/
return null;
}
TlsUtilities.CheckUint16(buf.Length);
int padding_length = (int)buf.Length - payload.Length;
/*
* RFC 6520 4. The padding of a received HeartbeatMessage message MUST be ignored
*/
return new HeartbeatMessage(type, payload, padding_length);
}
public static HeartbeatMessage Parse(Stream input)
{
byte b = TlsUtilities.ReadUint8(input);
if (!HeartbeatMessageType.IsValid(b))
{
throw new TlsFatalAlert(47);
}
int payloadLength = TlsUtilities.ReadUint16(input);
PayloadBuffer payloadBuffer = new PayloadBuffer();
Streams.PipeAll(input, payloadBuffer);
byte[] array = payloadBuffer.ToTruncatedByteArray(payloadLength);
if (array == null)
{
return(null);
}
TlsUtilities.CheckUint16(payloadBuffer.Length);
int paddingLength = (int)payloadBuffer.Length - array.Length;
return(new HeartbeatMessage(b, array, paddingLength));
}
public TcpPacket(byte packetType, byte[] payload)
{
this.PacketType = packetType;
this.PayloadBuffer = new MemoryStream();
PayloadBuffer.Write(payload, 0, payload.Length);
}
