[Freeswitch-users] Anyone got ZRTP MiTM working?

[Peter Villeneuve]

Thanks guys. It was indeed a silly mistake.
Recompiling latest mster from git with the ZRTP flag now works.

I see ZRTP being established correctly but I still can't get FS to confirm
that the call is secure in the dialplan.
I think the issue may lie with the correct wording of
the ${zrtp_secure_media_confirmed}

Here's what the logs show (note that zrtp is indeed active as I can see the
SAS in both Jitsi and CSipSimple)

parsing [features->is_zrtp_secure] continue=true
Dialplan: sofia/internal/1010 at my.domain.com Regex (FAIL) [is_zrtp_secure]
${zrtp_secure_media_confirmed}() =~ /^true$/ break=on-false
Dialplan: sofia/internal/1010 at my.domain.com ANTI-Action eval(not_secure)
EXECUTE sofia/internal/1010 at my.domain.com eval(not_secure)
2014-04-09 18:33:10.872707 [NOTICE] switch_core_session.c:2953 Execute
eval(not_secure)
EXECUTE sofia/internal/1010 at my.domain.com eval(not_secure)


I've tried playing with the wording of the ${zrtp_secure_media_confirmed}
since I recall a similar problem with SRTP and some recent code changes in
FS (I added audio to the name of the variable)
Unfortunately none of the 2 options I tried made any difference.

<extension name="is_zrtp_secure" continue="true">
      <condition field="${zrtp_secure_media_confirmed}" expression="^true$">
      <!-- <condition field="${zrtp_secure_media_confirmed_audio}"
expression="^true$">-->
<action application="sleep" data="1000"/>
<action application="playback" data="misc/call_secured.wav"/>
<anti-action application="eval" data="not_secure"/>
      </condition>
    </extension>

Any clues as to what's wrong?


Thanks,

Peter


On Tue, Apr 8, 2014 at 2:04 PM, Steven Ayre <steveayre at gmail.com> wrote:

> Just rebuild and install as normal, it'll be an upgrade. Your config files
> should be preserved, but back them up just in case.
>
>
>
> On Tuesday, April 8, 2014, Peter Villeneuve <petervnv1 at gmail.com> wrote:
>
>> I can't believe how stupid I am. Now that you mention it I'm no longer
>> sure I did compile it explicitly with the --enable-zrtp flag.
>> I guess that would explain it. Sorry for wasting your time with such a
>> silly mistake.
>>
>> Guess I need to start over. Is there a make uninstall or is there a
>> recommended way to remove FS?
>>
>>
>> On Mon, Apr 7, 2014 at 10:55 PM, Brian West <brian at freeswitch.org> wrote:
>>
>>> You compiled with --enable-zrtp?  And you you see the ZRTP activity in
>>> the logs when making calls?
>>> --
>>> Brian West
>>> brian at freeswitch.org
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>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Apr 7, 2014, at 4:49 PM, Peter Villeneuve <petervnv1 at gmail.com>
>>> wrote:
>>>
>>> > Thanks for helping out Brian.
>>> >
>>> > The problem I have is that FS doesn't seem to recognize the client has
>>> ZRTP when I dial 9787 (CSipSimple in this case with ZRTP enabled).
>>> > I hear the nice lady tell me that my endpoint doesn't have ZRTP but I
>>> see in the FS logs that it correctly sees the ZRTP hash.
>>> >
>>> > I've disabled zrtp passthrough in the sip profile and still FS doesn't
>>> seem to detect the client has ZRTP and enroll it.
>>> >
>>> >
>>>
>>>
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>>
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