Hi All I am planning to enhance RTP proxy to support TLS and DTLS. We have some requirements where we need to send RTP packets either over TLS or over DTLS.
I really do not know where to start :-)
Few things that I have thought over is
1. I will take opnssl code base and integrate with rtpproxy code.
2. Will refer kamailio proxy code how tls connection framework is there and try to copy the code from kamailio code base to rtp proxy code base, OR is there a better alternative here.
If somebody has a better idea, kindly share.
Thanks a lot. -kamal
Hello.
2012/10/15 Kamal Palei palei.kamal@gmail.com:
Hi All I am planning to enhance RTP proxy to support TLS and DTLS. We have some requirements where we need to send RTP packets either over TLS or over DTLS.
Shouldn't it be better to rely on SRTP/ZRTP instead rather than making your own incompatible realisation?
Its basically sip and media servers expects sip and media packets in TLS. No choice, but need to support.
Best Regards kamal
On Mon, Oct 15, 2012 at 4:54 PM, Peter Lemenkov lemenkov@gmail.com wrote:
Hello.
2012/10/15 Kamal Palei palei.kamal@gmail.com:
Hi All I am planning to enhance RTP proxy to support TLS and DTLS. We have some requirements where we need to send RTP packets either over
TLS
or over DTLS.
Shouldn't it be better to rely on SRTP/ZRTP instead rather than making your own incompatible realisation?
-- With best regards, Peter Lemenkov.
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
15 okt 2012 kl. 13:24 skrev Peter Lemenkov lemenkov@gmail.com:
Hello.
2012/10/15 Kamal Palei palei.kamal@gmail.com:
Hi All I am planning to enhance RTP proxy to support TLS and DTLS. We have some requirements where we need to send RTP packets either over TLS or over DTLS.
Shouldn't it be better to rely on SRTP/ZRTP instead rather than making your own incompatible realisation?
SRTP use DTLS for key exchange. There's also solutions for RTP over DTLS, but the recommended way is DTLS+SRTP. This is what's standardized for WebRTC, and the way forward for SIP media as well.
However, I don't see how RTPproxy can be the endpoint for DTLS key exchange, since it breaks the end2end path. Clients should use TURN relays...
Curious on how you see this working! /O
Hi Johansson, All Sincier regards and thanks for input.
As I understand, all media packets pass through RTP Proxy. The RTP Proxy will receive simple UDP media packets from endpoints. Next RTP proxy today pass those RTP packets to destination party.
My job is precisely to support TLS and DTLS path between RTP Proxy and destination party. In my setup the destination party is a media server.
Do you really see a risk to have this setup. If so, please elaborate.
I underdstand here the challenge setup TLS/DTLS connection with media server and send/recv media packets with server usuing either TLS or DTLS.
Also you mentioned "There's also solutions for RTP over DTLS" , can you please share from where I can get the reference solution, it help me to great extent.
Best Regards Kamal
On Tue, Oct 16, 2012 at 12:08 AM, Olle E. Johansson oej@edvina.net wrote:
15 okt 2012 kl. 13:24 skrev Peter Lemenkov lemenkov@gmail.com:
Hello.
2012/10/15 Kamal Palei palei.kamal@gmail.com:
Hi All I am planning to enhance RTP proxy to support TLS and DTLS. We have some requirements where we need to send RTP packets either over
TLS
or over DTLS.
Shouldn't it be better to rely on SRTP/ZRTP instead rather than making your own incompatible realisation?
SRTP use DTLS for key exchange. There's also solutions for RTP over DTLS, but the recommended way is DTLS+SRTP. This is what's standardized for WebRTC, and the way forward for SIP media as well.
However, I don't see how RTPproxy can be the endpoint for DTLS key exchange, since it breaks the end2end path. Clients should use TURN relays...
Curious on how you see this working! /O _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
Kamal, perhaps RFC 5763 provides you some of the answers?
On 10/16/2012 11:06 AM, Kamal Palei wrote:
Hi Johansson, All Sincier regards and thanks for input.
As I understand, all media packets pass through RTP Proxy. The RTP Proxy will receive simple UDP media packets from endpoints. Next RTP proxy today pass those RTP packets to destination party.
My job is precisely to support TLS and DTLS path between RTP Proxy and destination party. In my setup the destination party is a media server.
Do you really see a risk to have this setup. If so, please elaborate.
I underdstand here the challenge setup TLS/DTLS connection with media server and send/recv media packets with server usuing either TLS or DTLS.
Also you mentioned "There's also solutions for RTP over DTLS" , can you please share from where I can get the reference solution, it help me to great extent.
Best Regards Kamal
On Tue, Oct 16, 2012 at 12:08 AM, Olle E. Johansson <oej@edvina.net mailto:oej@edvina.net> wrote:
15 okt 2012 kl. 13:24 skrev Peter Lemenkov <lemenkov@gmail.com <mailto:lemenkov@gmail.com>>: > Hello. > > 2012/10/15 Kamal Palei <palei.kamal@gmail.com <mailto:palei.kamal@gmail.com>>: >> Hi All >> I am planning to enhance RTP proxy to support TLS and DTLS. >> We have some requirements where we need to send RTP packets either over TLS >> or over DTLS. > > Shouldn't it be better to rely on SRTP/ZRTP instead rather than making > your own incompatible realisation? SRTP use DTLS for key exchange. There's also solutions for RTP over DTLS, but the recommended way is DTLS+SRTP. This is what's standardized for WebRTC, and the way forward for SIP media as well. However, I don't see how RTPproxy can be the endpoint for DTLS key exchange, since it breaks the end2end path. Clients should use TURN relays... Curious on how you see this working! /O _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org <mailto:sr-users@lists.sip-router.org> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
Not sure if this RFC is the thing Kamal is looking for. AFAIS this RFC is about setting up an SRTP sessions, and the key exchange for the SRTP session does not happen via SIP (like SDES), but via a DTLS session which is performed before sending SRTP packets multiplexed on the media ports.
regards Klaus
On 16.10.2012 11:24, Andrew Pogrebennyk wrote:
Kamal, perhaps RFC 5763 provides you some of the answers?
On 10/16/2012 11:06 AM, Kamal Palei wrote:
Hi Johansson, All Sincier regards and thanks for input.
As I understand, all media packets pass through RTP Proxy. The RTP Proxy will receive simple UDP media packets from endpoints. Next RTP proxy today pass those RTP packets to destination party.
My job is precisely to support TLS and DTLS path between RTP Proxy and destination party. In my setup the destination party is a media server.
Do you really see a risk to have this setup. If so, please elaborate.
I underdstand here the challenge setup TLS/DTLS connection with media server and send/recv media packets with server usuing either TLS or DTLS.
Also you mentioned "There's also solutions for RTP over DTLS" , can you please share from where I can get the reference solution, it help me to great extent.
Best Regards Kamal
On Tue, Oct 16, 2012 at 12:08 AM, Olle E. Johansson <oej@edvina.net mailto:oej@edvina.net> wrote:
15 okt 2012 kl. 13:24 skrev Peter Lemenkov <lemenkov@gmail.com <mailto:lemenkov@gmail.com>>: > Hello. > > 2012/10/15 Kamal Palei <palei.kamal@gmail.com <mailto:palei.kamal@gmail.com>>: >> Hi All >> I am planning to enhance RTP proxy to support TLS and DTLS. >> We have some requirements where we need to send RTP packets either over TLS >> or over DTLS. > > Shouldn't it be better to rely on SRTP/ZRTP instead rather than making > your own incompatible realisation? SRTP use DTLS for key exchange. There's also solutions for RTP over DTLS, but the recommended way is DTLS+SRTP. This is what's standardized for WebRTC, and the way forward for SIP media as well. However, I don't see how RTPproxy can be the endpoint for DTLS key exchange, since it breaks the end2end path. Clients should use TURN relays... Curious on how you see this working! /O _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org <mailto:sr-users@lists.sip-router.org> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
-
Andrew Pogrebennyk -
Kamal Palei -
Klaus Darilion -
Olle E. Johansson -
Peter Lemenkov