[Freeswitch-users] To decypt webrtc audio

Fri Oct 31 16:55:00 MSK 2014

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
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>>>>>>>>>
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>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> _________________________________________________________________________
>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>> consulting at freeswitch.org
>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>
>>>>>>>> Official FreeSWITCH Sites
>>>>>>>> http://www.freeswitch.org
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>>>>>>>> http://www.cluecon.com
>>>>>>>>
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>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> 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
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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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>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> 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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>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> _________________________________________________________________________
>>>>> Professional FreeSWITCH Consulting Services:
>>>>> consulting at freeswitch.org
>>>>> http://www.freeswitchsolutions.com
>>>>>
>>>>> Official FreeSWITCH Sites
>>>>> http://www.freeswitch.org
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>>>>> http://www.cluecon.com
>>>>>
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>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> 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
>>>>
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>>>>
>>>
>>>
>>
>> --
>> 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
>>
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>>
>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
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> http://confluence.freeswitch.org
> http://www.cluecon.com
>
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