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Re: [Linphone-developers] are there any updates planned for bzrtp?

From: jehan monnier
Subject: Re: [Linphone-developers] are there any updates planned for bzrtp?
Date: Fri, 12 Dec 2014 11:53:27 +0100

Hi Guy,

So far, only mandatories ciphers are implemented in bzrtp. However as you noticed, adding new ciphering suite is doable.
We would be pleased to review your patches and to integrate them into MS2 if relevant. Note we will also ask you to sign our contributor agreement (

Best regards

Best regards

Le 12 déc. 2014 à 02:54, Ben Sartor <address@hidden> a écrit :

Hello Eli, hello all,

I'm certainly interested in having some more crypto algorithms in bzrtp too.
Furthermore I would have some time to help with the patches.

Maybe we can do something about getting the patches merged. E.g. I could
review and test your (Eli's) patches before requesting to merge them (and vice
versa). This would hopefully reduce the time Belladonne has to spent on it.

What do you think?

Best Regards


Off the list, I thought I’d share some additional details with you. I've got
a tweaked liblinphone that uses zrtpcpp 4.2.4 with the extra algorithms I
mentioned. I’d be happy to share if you want it.

Unfortunately, Belladonne nuked their ZRTP compatibility layer, which used
to live in the oRTP submodule, in favor of directly calling bzrtp functions
from the mediastreamer2 submodule. So using zrtpcpp means giving up on
updates to liblinphone and belle-sip (after approx January of this year).

On the “slightly good news” front, all of the necessary algorithm support
for bzrtp is available in PolarSSL; it just needs to be exposed. I have
some half-hearted approval from my boss to work on this if the Belladonne
guys won’t. I just wish they had a better track record for accepting


On Dec 4, 2014, at 1:49 PM, address@hidden wrote:

Message: 2
Date: Thu, 4 Dec 2014 18:49:31 +0000
From: Peter Villeneuve <address@hidden <mailto:address@hidden>>
To: address@hidden <mailto:address@hidden>
Subject: Re: [Linphone-developers] are there any updates planned for


Content-Type: text/plain; charset="utf-8"

This is a great question and something I started looking at recently also.
CSipSimple, as an example of another open source sip client, uses openssl
and has support for all those algos and more (twofish) for ZRTP.

I'd love to see linphone adapt more secure algos and keysizes. Are there
any plans for this?


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