public static byte[] GetHandshakeResponse(ByteBuffer input)
{
int position = (int)input.Position;
if (input[position + 4] == 0)
{
//Using old style handshake
byte[] output = new byte[2 * RtmpProtocolDecoder.HandshakeSize + 1];
output[0] = 0x03;
int tick = System.Environment.TickCount;
output[1] = (byte)((tick >> 24) & 0xff);
output[2] = (byte)((tick >> 16) & 0xff);
output[3] = (byte)((tick >> 8) & 0xff);
output[4] = (byte)(tick & 0xff);
HandshakePadBytes.CopyTo(output, 5);
input.Read(output, RtmpProtocolDecoder.HandshakeSize + 1, RtmpProtocolDecoder.HandshakeSize);
return output;
}
else
{
//This method is broken by FP 10.0.32.18
//int index = (input[8] + input[9] + input[10] + input[11]) % 728 + 12;
int index = 0;
if (input[position + 5] == 0 && input[position + 6] == 3 && input[position + 7] == 2)
index = ((input[position + 772] & 0x0ff) + (input[position + 773] & 0x0ff) + (input[position + 774] & 0x0ff) + (input[position + 775] & 0x0ff)) % 728 + 776;
else
index = ((input[position + 8] & 0x0ff) + (input[position + 9] & 0x0ff) + (input[position + 10] & 0x0ff) + (input[position + 11] & 0x0ff)) % 728 + 12;
byte[] part = new byte[32];
for (int i = 0; i < 32; ++i)
{
part[i] = input[position + index + i];
}
HMACSHA256 hmacsha256 = new HMACSHA256();
hmacsha256.Key = SecretKey;
byte[] newKey = hmacsha256.ComputeHash(part);
byte[] randBytes = new byte[RtmpProtocolDecoder.HandshakeSize - 32];
Random random = new Random();
random.NextBytes(randBytes);
hmacsha256.Key = newKey;
byte[] hashedBytes = hmacsha256.ComputeHash(randBytes);
byte[] output = new byte[2 * RtmpProtocolDecoder.HandshakeSize + 1];
output[0] = 0x03;
HandshakeServerBytes.CopyTo(output, 1);
//randBytes.CopyTo(output, RtmpProtocolDecoder.HandshakeSize + 1);
randBytes.CopyTo(output, 1 + HandshakeServerBytes.Length);
//hashedBytes.CopyTo(output, RtmpProtocolDecoder.HandshakeSize + 1 + randBytes.Length);
hashedBytes.CopyTo(output, 1 + HandshakeServerBytes.Length + randBytes.Length);
input.Skip(RtmpProtocolDecoder.HandshakeSize);
return output;
}
}
public bool AddData(ByteBuffer data)
{
if (data.Limit == 0)
return false;// Empty buffer
if (!CanHandleData(data))
return false;
byte first = data.Get();
data.Rewind();
if ((first & 0xf0) != VideoCodec.FLV_FRAME_KEY)
return true;// Not a keyframe
// Store last keyframe
_dataCount = data.Limit;
if (_blockSize < _dataCount)
{
_blockSize = _dataCount;
_blockData = new byte[_blockSize];
}
data.Read(_blockData, 0, _dataCount);
data.Rewind();
return true;
}
public bool AddData(ByteBuffer data)
{
if (data.Limit == 0)
return false;// Empty buffer
if (!CanHandleData(data))
return false;
data.Get();
UpdateSize(data);
int idx = 0;
int pos = 0;
byte[] tmpData = new byte[_blockDataSize];
int countBlocks = _blockCount;
while (data.Remaining > 0 && countBlocks > 0)
{
short size = data.GetShort();
countBlocks--;
if (size == 0)
{
// Block has not been modified
idx += 1;
pos += _blockDataSize;
continue;
}
// Store new block data
_blockSize[idx] = size;
data.Read(tmpData, 0, size);
Array.Copy(tmpData, 0, _blockData, pos, size);
idx += 1;
pos += _blockDataSize;
}
data.Rewind();
return true;
}
public bool AddData(ByteBuffer data)
{
if (data.Limit == 0)
return true;
if (!CanHandleData(data))
return false;
data.Rewind();
byte frameType = data.Get();
data.Rewind();
if ((frameType & 0xf0) != VideoCodec.FLV_FRAME_KEY)
return true;// Not a keyframe
//If we don't have the AVCDecoderConfigurationRecord stored...
if (_blockDataAVCDCR == null)
{
data.Get();//FT
data.Get();//CODECID
byte AVCPacketType = data.Get();
//Sequence Header / here comes a AVCDecoderConfigurationRecord
if (log.IsDebugEnabled)
log.Debug(string.Format("AVCPacketType: {0}", AVCPacketType));
if (AVCPacketType == 0)
{
data.Rewind();
// Store AVCDecoderConfigurationRecord data
_dataCountAVCDCR = data.Limit;
if (_blockSizeAVCDCR < _dataCountAVCDCR)
{
_blockSizeAVCDCR = _dataCountAVCDCR;
_blockDataAVCDCR = new byte[_blockSizeAVCDCR];
}
data.Read(_blockDataAVCDCR, 0, _dataCountAVCDCR);
}
}
data.Rewind();
// Store last keyframe
_dataCountLKF = data.Limit;
if (_blockSizeLKF < _dataCountLKF)
{
_blockSizeLKF = _dataCountLKF;
_blockDataLKF = new byte[_blockSizeLKF];
}
data.Read(_blockDataLKF, 0, _dataCountLKF);
data.Rewind();
return true;
}
