/// <summary>
/// Hands the socket handle to the DTLS context and waits for the handshake to complete.
/// </summary>
/// <param name="peerConnection">The WebRTC session to perform the DTLS handshake on.</param>
/// <returns>True if the handshake completes successfully. False if not.</returns>
private static async Task <bool> DoDtlsHandshake(RTCPeerConnection peerConnection, DtlsHandshake dtls)
{
Console.WriteLine("DoDtlsHandshake started.");
int res = dtls.DoHandshakeAsServer((ulong)peerConnection.GetRtpChannel(SDPMediaTypesEnum.audio).RtpSocket.Handle);
Console.WriteLine("DtlsContext initialisation result=" + res);
if (dtls.IsHandshakeComplete())
{
Console.WriteLine("DTLS negotiation complete.");
// TODO fix race condition!!! First RTP packet is not getting decrypted.
var srtpSendContext = new Srtp(dtls, false);
var srtpReceiveContext = new Srtp(dtls, true);
peerConnection.SetSecurityContext(
srtpSendContext.ProtectRTP,
srtpReceiveContext.UnprotectRTP,
srtpSendContext.ProtectRTCP,
srtpReceiveContext.UnprotectRTCP);
await peerConnection.Start();
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Hands the socket handle to the DTLS context and waits for the handshake to complete.
/// </summary>
/// <param name="webRtcSession">The WebRTC session to perform the DTLS handshake on.</param>
/// <returns>True if the handshake completed successfully or false otherwise.</returns>
private static async Task <bool> DoDtlsHandshake(RTCPeerConnection peerConnection, DtlsHandshake dtls)
{
logger.LogDebug("DoDtlsHandshake started.");
int res = dtls.DoHandshakeAsServer((ulong)peerConnection.GetRtpChannel(SDPMediaTypesEnum.audio).RtpSocket.Handle);
logger.LogDebug("DtlsContext initialisation result=" + res);
if (dtls.IsHandshakeComplete())
{
logger.LogDebug("DTLS negotiation complete.");
var srtpSendContext = new Srtp(dtls, false);
var srtpReceiveContext = new Srtp(dtls, true);
peerConnection.SetSecurityContext(
srtpSendContext.ProtectRTP,
srtpReceiveContext.UnprotectRTP,
srtpSendContext.ProtectRTCP,
srtpReceiveContext.UnprotectRTCP);
await peerConnection.Start();
if (!_isSampling)
{
_ = Task.Run(StartMedia);
}
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Hands the socket handle to the DTLS context and waits for the handshake to complete.
/// </summary>
/// <param name="webRtcSession">The WebRTC session to perform the DTLS handshake on.</param>
/// <returns>True if the handshake completed successfully or false otherwise.</returns>
private static bool DoDtlsHandshake(RTCPeerConnection peerConnection)
{
logger.LogDebug("DoDtlsHandshake started.");
var dtls = new DtlsHandshake(DTLS_CERTIFICATE_PATH, DTLS_KEY_PATH);
int res = dtls.DoHandshakeAsServer((ulong)peerConnection.GetRtpChannel(SDPMediaTypesEnum.audio).RtpSocket.Handle);
logger.LogDebug("DtlsContext initialisation result=" + res);
if (dtls.IsHandshakeComplete())
{
logger.LogDebug("DTLS negotiation complete.");
var srtpSendContext = new Srtp(dtls, false);
var srtpReceiveContext = new Srtp(dtls, true);
peerConnection.SetSecurityContext(
srtpSendContext.ProtectRTP,
srtpReceiveContext.UnprotectRTP,
srtpSendContext.ProtectRTCP,
srtpReceiveContext.UnprotectRTCP);
dtls.Shutdown();
return(true);
}
else
{
dtls.Shutdown();
return(false);
}
}
/// <summary>
/// Hands the socket handle to the DTLS context and waits for the handshake to complete.
/// </summary>
/// <param name="webRtcSession">The WebRTC session to perform the DTLS handshake on.</param>
private static bool DoDtlsHandshake(RTCPeerConnection peerConnection)
{
Log.LogDebug("DoDtlsHandshake started.");
if (!File.Exists(DTLS_CERTIFICATE_PATH))
{
throw new ApplicationException($"The DTLS certificate file could not be found at {DTLS_CERTIFICATE_PATH}.");
}
else if (!File.Exists(DTLS_KEY_PATH))
{
throw new ApplicationException($"The DTLS key file could not be found at {DTLS_KEY_PATH}.");
}
var dtls = new DtlsHandshake(DTLS_CERTIFICATE_PATH, DTLS_KEY_PATH);
peerConnection.onconnectionstatechange += (state) =>
{
if (state == RTCPeerConnectionState.closed)
{
dtls.Shutdown();
}
};
byte[] clientFingerprint = null;
int res = dtls.DoHandshakeAsServer((ulong)peerConnection.GetRtpChannel(SDPMediaTypesEnum.audio).RtpSocket.Handle, ref clientFingerprint);
Log.LogDebug("DtlsContext initialisation result=" + res);
if (dtls.IsHandshakeComplete())
{
// TODO: Check client fingerprint matches one supplied in the SDP.
Log.LogDebug("DTLS negotiation complete.");
var srtpSendContext = new Srtp(dtls, false);
var srtpReceiveContext = new Srtp(dtls, true);
peerConnection.SetSecurityContext(
srtpSendContext.ProtectRTP,
srtpReceiveContext.UnprotectRTP,
srtpSendContext.ProtectRTCP,
srtpReceiveContext.UnprotectRTCP);
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Hands the socket handle to the DTLS context and waits for the handshake to complete.
/// </summary>
/// <param name="webRtcSession">The WebRTC session to perform the DTLS handshake on.</param>
private static async Task <bool> DoDtlsHandshake(RTCPeerConnection peerConnection, DtlsHandshake dtls)
{
logger.LogDebug("DoDtlsHandshake started.");
if (!File.Exists(DTLS_CERTIFICATE_PATH))
{
throw new ApplicationException($"The DTLS certificate file could not be found at {DTLS_CERTIFICATE_PATH}.");
}
else if (!File.Exists(DTLS_KEY_PATH))
{
throw new ApplicationException($"The DTLS key file could not be found at {DTLS_KEY_PATH}.");
}
byte[] clientFingerprint = null;
int res = dtls.DoHandshakeAsServer((ulong)peerConnection.GetRtpChannel(SDPMediaTypesEnum.audio).RtpSocket.Handle, ref clientFingerprint);
logger.LogDebug("DtlsContext initialisation result=" + res);
if (dtls.IsHandshakeComplete())
{
logger.LogDebug("DTLS negotiation complete.");
// TODO: Check client fingerprint matches one supplied in the SDP.
var srtpSendContext = new Srtp(dtls, false);
var srtpReceiveContext = new Srtp(dtls, true);
peerConnection.SetSecurityContext(
srtpSendContext.ProtectRTP,
srtpReceiveContext.UnprotectRTP,
srtpSendContext.ProtectRTCP,
srtpReceiveContext.UnprotectRTCP);
await peerConnection.Start();
//dtls.Shutdown();
if (_sendTestPatternTimer == null)
{
_sendTestPatternTimer = new Timer(SendTestPattern, null, 0, TEST_PATTERN_SPACING_MILLISECONDS);
}
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Hands the socket handle to the DTLS context and waits for the handshake to complete.
/// </summary>
/// <param name="webRtcSession">The WebRTC session to perform the DTLS handshake on.</param>
private static async Task <bool> DoDtlsHandshake(RTCPeerConnection peerConnection)
{
logger.LogDebug("DoDtlsHandshake started.");
if (!File.Exists(DTLS_CERTIFICATE_PATH))
{
throw new ApplicationException($"The DTLS certificate file could not be found at {DTLS_CERTIFICATE_PATH}.");
}
else if (!File.Exists(DTLS_KEY_PATH))
{
throw new ApplicationException($"The DTLS key file could not be found at {DTLS_KEY_PATH}.");
}
var dtls = new DtlsHandshake(DTLS_CERTIFICATE_PATH, DTLS_KEY_PATH);
byte[] clientFingerprint = null;
var dtlsResult = await Task.Run(() => dtls.DoHandshakeAsServer((ulong)peerConnection.GetRtpChannel(SDPMediaTypesEnum.audio).RtpSocket.Handle, ref clientFingerprint));
logger.LogDebug("DtlsContext initialisation result=" + dtlsResult);
if (dtls.IsHandshakeComplete())
{
logger.LogDebug("DTLS handshake succeeded.");
// TODO: Check client fingerprint matches one supplied in the SDP.
var srtpSendContext = new Srtp(dtls, false);
var srtpReceiveContext = new Srtp(dtls, true);
peerConnection.SetSecurityContext(
srtpSendContext.ProtectRTP,
srtpReceiveContext.UnprotectRTP,
srtpSendContext.ProtectRTCP,
srtpReceiveContext.UnprotectRTCP);
return(true);
}
else
{
logger.LogWarning("DTLS handshake failed.");
dtls.Shutdown();
return(false);
}
}
/// <summary>
/// Hands the socket handle to the DTLS context and waits for the handshake to complete.
/// </summary>
/// <param name="webRtcSession">The WebRTC session to perform the DTLS handshake on.</param>
private static bool DoDtlsHandshake(RTCPeerConnection peerConnection, DtlsHandshake dtls)
{
Log.LogDebug("DoDtlsHandshake started.");
if (!File.Exists(DTLS_CERTIFICATE_PATH))
{
throw new ApplicationException($"The DTLS certificate file could not be found at {DTLS_CERTIFICATE_PATH}.");
}
else if (!File.Exists(DTLS_KEY_PATH))
{
throw new ApplicationException($"The DTLS key file could not be found at {DTLS_KEY_PATH}.");
}
byte[] clientFingerprint = null;
var dtlsResult = dtls.DoHandshakeAsServer((ulong)peerConnection.GetRtpChannel(SDPMediaTypesEnum.audio).RtpSocket.Handle, ref clientFingerprint);
Log.LogDebug($"DtlsContext initialisation result {dtlsResult}.");
if (dtls.IsHandshakeComplete())
{
Log.LogDebug("DTLS negotiation complete.");
var srtpSendContext = new Srtp(dtls, false);
var srtpReceiveContext = new Srtp(dtls, true);
peerConnection.SetSecurityContext(
srtpSendContext.ProtectRTP,
srtpReceiveContext.UnprotectRTP,
srtpSendContext.ProtectRTCP,
srtpReceiveContext.UnprotectRTCP);
return(true);
}
else
{
Log.LogWarning("DTLS handshake failed.");
dtls.Shutdown();
return(false);
}
}
/// <summary>
/// Hands the socket handle to the DTLS context and waits for the handshake to complete.
/// </summary>
/// <param name="webRtcSession">The WebRTC session to perform the DTLS handshake on.</param>
private static async Task <bool> DoDtlsHandshake(RTCPeerConnection peerConnection, DtlsHandshake dtls)
{
logger.LogDebug("DoDtlsHandshake started.");
if (!File.Exists(DTLS_CERTIFICATE_PATH))
{
throw new ApplicationException($"The DTLS certificate file could not be found at {DTLS_CERTIFICATE_PATH}.");
}
else if (!File.Exists(DTLS_KEY_PATH))
{
throw new ApplicationException($"The DTLS key file could not be found at {DTLS_KEY_PATH}.");
}
int res = dtls.DoHandshakeAsServer((ulong)peerConnection.GetRtpChannel(SDPMediaTypesEnum.audio).RtpSocket.Handle);
logger.LogDebug("DtlsContext initialisation result=" + res);
if (dtls.IsHandshakeComplete())
{
logger.LogDebug("DTLS negotiation complete.");
var srtpSendContext = new Srtp(dtls, false);
var srtpReceiveContext = new Srtp(dtls, true);
peerConnection.SetSecurityContext(
srtpSendContext.ProtectRTP,
srtpReceiveContext.UnprotectRTP,
srtpSendContext.ProtectRTCP,
srtpReceiveContext.UnprotectRTCP);
//dtls.Shutdown();
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Hands the socket handle to the DTLS context and waits for the handshake to complete.
/// </summary>
/// <param name="webRtcSession">The WebRTC session to perform the DTLS handshake on.</param>
private static bool DoDtlsHandshake(RTCPeerConnection pc, SIPSorceryMedia.DtlsHandshake dtls, bool isClient, byte[] sdpFingerprint)
{
logger.LogDebug("DoDtlsHandshake started.");
if (!File.Exists(DTLS_CERTIFICATE_PATH))
{
throw new ApplicationException($"The DTLS certificate file could not be found at {DTLS_CERTIFICATE_PATH}.");
}
else if (!File.Exists(DTLS_KEY_PATH))
{
throw new ApplicationException($"The DTLS key file could not be found at {DTLS_KEY_PATH}.");
}
int res = 0;
bool fingerprintMatch = false;
if (isClient)
{
logger.LogDebug($"DTLS client handshake starting to {pc.AudioDestinationEndPoint}.");
// For the DTLS handshake to work connect must be called on the socket so openssl knows where to send.
var rtpSocket = pc.GetRtpChannel(SDPMediaTypesEnum.audio).RtpSocket;
rtpSocket.Connect(pc.AudioDestinationEndPoint);
byte[] fingerprint = null;
var peerEP = pc.AudioDestinationEndPoint;
res = dtls.DoHandshakeAsClient((ulong)rtpSocket.Handle, (short)peerEP.AddressFamily.GetHashCode(), peerEP.Address.GetAddressBytes(), (ushort)peerEP.Port, ref fingerprint);
if (fingerprint != null)
{
logger.LogDebug($"DTLS server fingerprint {ByteBufferInfo.HexStr(fingerprint)}.");
fingerprintMatch = sdpFingerprint.SequenceEqual(fingerprint);
}
}
else
{
byte[] fingerprint = null;
res = dtls.DoHandshakeAsServer((ulong)pc.GetRtpChannel(SDPMediaTypesEnum.audio).RtpSocket.Handle, ref fingerprint);
if (fingerprint != null)
{
logger.LogDebug($"DTLS client fingerprint {ByteBufferInfo.HexStr(fingerprint)}.");
fingerprintMatch = sdpFingerprint.SequenceEqual(fingerprint);
}
}
logger.LogDebug("DtlsContext initialisation result=" + res);
if (dtls.IsHandshakeComplete())
{
logger.LogDebug("DTLS negotiation complete.");
if (!fingerprintMatch)
{
logger.LogWarning("DTLS fingerprint mismatch.");
return(false);
}
else
{
var srtpSendContext = new SIPSorceryMedia.Srtp(dtls, isClient);
var srtpReceiveContext = new SIPSorceryMedia.Srtp(dtls, !isClient);
pc.SetSecurityContext(
srtpSendContext.ProtectRTP,
srtpReceiveContext.UnprotectRTP,
srtpSendContext.ProtectRTCP,
srtpReceiveContext.UnprotectRTCP);
return(true);
}
}
else
{
return(false);
}
}