[Freeswitch-users] To decypt webrtc audio

Tue Nov 4 10:02:22 MSK 2014

Hi Akio,

Yes the use case is to check the audio quality.

Regards

Varghese Paul

On Sun, Nov 2, 2014 at 2:58 AM, Ben Langfeld <ben at langfeld.co.uk> wrote:

> Ah, this is not what I understood from the original question. My apologies
> for the detour.
>
> On 31 October 2014 12:38, Varghese Paul <varghesepaul87 at gmail.com> wrote:
>
>> Hi Ben,
>>
>> I am looking for a tool like wireshark to decrypt the SRTP packets and
>> listen to the audio. RTPengine as you said we can bridge two channels and
>> we can't use it as a tool for decrypting SRTP traffic,
>>
>> Regards
>>
>> On Fri, Oct 31, 2014 at 7:25 PM, Carlos Ruiz Díaz <
>> carlos.ruizdiaz at gmail.com> wrote:
>>
>>> I understand that this is not what he is intending. Why would he need
>>> yet another rtp bridge if FS already does exactly that.
>>> On Oct 31, 2014 7:36 AM, "Ben Langfeld" <ben at langfeld.co.uk> wrote:
>>>
>>>> The way I use rtpengine, it rewrites SDP between the browser and
>>>> Asterisk 1.4, terminating DTLS and ICE. Between the browser and rtpengine
>>>> is RTP/SAVPF, while between rtpengine and Asterisk is RTP/AVP. rtpengine
>>>> generates its keys in what I assume to be the same way the browsers do.
>>>>
>>>> On 31 October 2014 10:51, Anthony Minessale <
>>>> anthony.minessale at gmail.com> wrote:
>>>>
>>>>> The tool from pjsip mentioned above requires the keys for the srtp
>>>>> decryption.  Does the one you mention do it differently?
>>>>>
>>>>>
>>>>> On Friday, October 31, 2014, Ben Langfeld <ben at langfeld.co.uk> wrote:
>>>>>
>>>>>> Anthony, I think I'm not understanding your concern. Could you
>>>>>> explain what you mean by logging the keys?
>>>>>>
>>>>>> On 30 October 2014 21:01, Anthony Minessale <
>>>>>> anthony.minessale at gmail.com> wrote:
>>>>>>
>>>>>>> The bigger question is how to log the keys without compromising the
>>>>>>> point of why its all encrypted.
>>>>>>> It would take some careful consideration.
>>>>>>>
>>>>>>>
>>>>>>> On Thu, Oct 30, 2014 at 12:32 PM, Ben Langfeld <ben at langfeld.co.uk>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> rtpengine does indeed allow decryption of DTLS encrypted RTP. I use
>>>>>>>> it in front of Asterisk 1.4 for exactly that (and ICE resolution).
>>>>>>>>
>>>>>>>> On 30 October 2014 14:55, Carlos Ruiz Díaz <
>>>>>>>> carlos.ruizdiaz at gmail.com> wrote:
>>>>>>>>
>>>>>>>>> rtpengine doesn't provide any mean to do any kind of decryption.
>>>>>>>>> The keys, however, are easily accessible if you are willing to modify the
>>>>>>>>> original software to create such functionality.
>>>>>>>>>
>>>>>>>>> Regards,
>>>>>>>>> Carlos
>>>>>>>>>
>>>>>>>>> On Thu, Oct 30, 2014 at 10:47 AM, Anthony Minessale <
>>>>>>>>> anthony.minessale at gmail.com> wrote:
>>>>>>>>>
>>>>>>>>>> This is a philosophical debate as to weather or not making the
>>>>>>>>>> key available somewhere it can be obtained from nullifies the intended
>>>>>>>>>> security.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Thu, Oct 30, 2014 at 5:33 AM, Ben Langfeld <ben at langfeld.co.uk
>>>>>>>>>> > wrote:
>>>>>>>>>>
>>>>>>>>>>> Look into rtpengine and perhaps Kamailio to control it.
>>>>>>>>>>>
>>>>>>>>>>> On 30 October 2014 04:41, Varghese Paul <
>>>>>>>>>>> varghesepaul87 at gmail.com> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Hi all,
>>>>>>>>>>>>
>>>>>>>>>>>> We are using freeswitch for handling webrtc calls and the
>>>>>>>>>>>> negotiation in DTLS mode.
>>>>>>>>>>>>
>>>>>>>>>>>> We are looking for a tool to decrypt the traffic between the
>>>>>>>>>>>> webrtc client and freeswitch server. I know there is already a tool
>>>>>>>>>>>> pcaputils from PJSIP for decrypting the SRTP traffic. Since we are using in
>>>>>>>>>>>> DTLS mode we can't use this.
>>>>>>>>>>>>
>>>>>>>>>>>> Can any one suggest any tool/method to decrypt the webrtc
>>>>>>>>>>>> audio?
>>>>>>>>>>>>
>>>>>>>>>>>> Regards
>>>>>>>>>>>>
>>>>>>>>>>>> Varghese Paul
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> _________________________________________________________________________
>>>>>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>>>>>> consulting at freeswitch.org
>>>>>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>>>>>
>>>>>>>>>>>> Official FreeSWITCH Sites
>>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>>> http://confluence.freeswitch.org
>>>>>>>>>>>> http://www.cluecon.com
>>>>>>>>>>>>
>>>>>>>>>>>> FreeSWITCH-users mailing list
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>>>>>>>>>>>> UNSUBSCRIBE:
>>>>>>>>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> _________________________________________________________________________
>>>>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>>>>> consulting at freeswitch.org
>>>>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>>>>
>>>>>>>>>>> Official FreeSWITCH Sites
>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>> http://confluence.freeswitch.org
>>>>>>>>>>> http://www.cluecon.com
>>>>>>>>>>>
>>>>>>>>>>> FreeSWITCH-users mailing list
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>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬
>>>>>>>>>>
>>>>>>>>>> ☞ http://freeswitch.org/  ☞ http://cluecon.com/  ☞
>>>>>>>>>> http://twitter.com/FreeSWITCH
>>>>>>>>>> ☞ irc.freenode.net #freeswitch ☞ *http://freeswitch.org/g+
>>>>>>>>>> <http://freeswitch.org/g+>*
>>>>>>>>>>
>>>>>>>>>> ClueCon Weekly Development Call
>>>>>>>>>> ☎ sip:888 at conference.freeswitch.org  ☎ +19193869900
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> _________________________________________________________________________
>>>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>>>> consulting at freeswitch.org
>>>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>>>
>>>>>>>>>> Official FreeSWITCH Sites
>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>> http://confluence.freeswitch.org
>>>>>>>>>> http://www.cluecon.com
>>>>>>>>>>
>>>>>>>>>> FreeSWITCH-users mailing list
>>>>>>>>>> FreeSWITCH-users at lists.freeswitch.org
>>>>>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>>>> UNSUBSCRIBE:
>>>>>>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Carlos
>>>>>>>>> http://caruizdiaz.com
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> _________________________________________________________________________
>>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>>> consulting at freeswitch.org
>>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>>
>>>>>>>>> Official FreeSWITCH Sites
>>>>>>>>> http://www.freeswitch.org
>>>>>>>>> http://confluence.freeswitch.org
>>>>>>>>> http://www.cluecon.com
>>>>>>>>>
>>>>>>>>> FreeSWITCH-users mailing list
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>>>>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>>> UNSUBSCRIBE:
>>>>>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> _________________________________________________________________________
>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>> consulting at freeswitch.org
>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>
>>>>>>>> Official FreeSWITCH Sites
>>>>>>>> http://www.freeswitch.org
>>>>>>>> http://confluence.freeswitch.org
>>>>>>>> http://www.cluecon.com
>>>>>>>>
>>>>>>>> FreeSWITCH-users mailing list
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>>>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>> UNSUBSCRIBE:
>>>>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>> http://www.freeswitch.org
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬
>>>>>>>
>>>>>>> ☞ http://freeswitch.org/  ☞ http://cluecon.com/  ☞
>>>>>>> http://twitter.com/FreeSWITCH
>>>>>>> ☞ irc.freenode.net #freeswitch ☞ *http://freeswitch.org/g+
>>>>>>> <http://freeswitch.org/g+>*
>>>>>>>
>>>>>>> ClueCon Weekly Development Call
>>>>>>> ☎ sip:888 at conference.freeswitch.org  ☎ +19193869900
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _________________________________________________________________________
>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>> consulting at freeswitch.org
>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>
>>>>>>> Official FreeSWITCH Sites
>>>>>>> http://www.freeswitch.org
>>>>>>> http://confluence.freeswitch.org
>>>>>>> http://www.cluecon.com
>>>>>>>
>>>>>>> FreeSWITCH-users mailing list
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>>>>>>> http://www.freeswitch.org
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>> --
>>>>> Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬
>>>>>
>>>>> ☞ http://freeswitch.org/  ☞ http://cluecon.com/  ☞
>>>>> http://twitter.com/FreeSWITCH
>>>>> ☞ irc.freenode.net #freeswitch ☞ *http://freeswitch.org/g+
>>>>> <http://freeswitch.org/g+>*
>>>>>
>>>>> ClueCon Weekly Development Call
>>>>> ☎ sip:888 at conference.freeswitch.org  ☎ +19193869900
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> _________________________________________________________________________
>>>>> Professional FreeSWITCH Consulting Services:
>>>>> consulting at freeswitch.org
>>>>> http://www.freeswitchsolutions.com
>>>>>
>>>>> Official FreeSWITCH Sites
>>>>> http://www.freeswitch.org
>>>>> http://confluence.freeswitch.org
>>>>> http://www.cluecon.com
>>>>>
>>>>> FreeSWITCH-users mailing list
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>>>>>
>>>>
>>>>
>>>>
>>>> _________________________________________________________________________
>>>> Professional FreeSWITCH Consulting Services:
>>>> consulting at freeswitch.org
>>>> http://www.freeswitchsolutions.com
>>>>
>>>> Official FreeSWITCH Sites
>>>> http://www.freeswitch.org
>>>> http://confluence.freeswitch.org
>>>> http://www.cluecon.com
>>>>
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>>>>
>>>
>>> _________________________________________________________________________
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>>> http://www.freeswitchsolutions.com
>>>
>>> Official FreeSWITCH Sites
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>>>
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>>>
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://confluence.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-users mailing list
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>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>> http://www.freeswitch.org
>>
>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://confluence.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
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>
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