[OpenSIPS-Users] SDES and DTLS mutually exclusive

[Robert Dyck]

Perhaps you misinterpreted my wording. I actually tired SDES=off but crypto 
attributes were still inserted..

It is a bit strange that ICE=force should arbitrarily add the crypto.

On Monday, July 6, 2020 12:25:44 A.M. PDT Răzvan Crainea wrote:
> You should use the SDES-off flag to rtoengine.
> 
> Best regards,
> 
> Răzvan Crainea
> OpenSIPS Core Developer
> http://www.opensips-solutions.com
> 
> On 7/4/20 10:34 PM, Robert Dyck wrote:
> > I have run into an issue with rtpengine and the ICE=force option.
> > 
> > To quote the rtpengine README
> > 
> > With `force`, ICE attributes are first stripped, then new attributes are
> > 
> >         generated and inserted, which leaves the media proxy as the only
> > 
> > ICE candidate.
> > 
> > When using the force option where I think it will be appropriate I found
> > it also adds crypto attributes. I believe this invokes SDES security. If
> > the setup attribute is also present ( DTLS security ) the call fails
> > with bad description. SDES=off does not prevent this behaviour. The
> > error message from the UA says there cannot be both.
> > 
> > a=crypto:1 AES_CM_128_HMAC_SHA1_80
> > inline:/msDyiV8x6qpcH4m1iEmxo8aqAAhhkGctQbxvkNy
> > 
> > a=crypto:2 AES_CM_128_HMAC_SHA1_32
> > inline:JgDv7fMfKd1GQcFq9Jn0tMf1C5DE0VaRDe6Js8D6
> > 
> > a=crypto:3 AES_192_CM_HMAC_SHA1_80
> > inline:CiCkAETMov/tbVsqykp7j3/PB7aUfQjv+nozBQuOUMBnJlrm8bU
> > 
> > a=crypto:4 AES_192_CM_HMAC_SHA1_32
> > inline:6ktVsgwfiGg4US2BLWuV3XpCt0fvkiuFgcEr8n83KDln8w9ar+c
> > 
> > a=crypto:5 AES_256_CM_HMAC_SHA1_80
> > inline:l1pr/67vqwthDdnRoSaTbGvRPBNP7uHIhjfeG8InuqWQZjLkumU5MVKz2mAujw
> > 
> > a=crypto:6 AES_256_CM_HMAC_SHA1_32
> > inline:V+K2bK8Zahr9KX7zswVwM2cpZ+/g8hMD4a5PmJzncH8WgDnCH/xLH0CFRwYKgg
> > 
> > a=crypto:7 F8_128_HMAC_SHA1_80
> > inline:Z00dhmeQwuttjeRawylGKannT7KbBZhDExDxETNo
> > 
> > a=crypto:8 F8_128_HMAC_SHA1_32
> > inline:R5Vqt9WQ1wU76GcS7CvDosgbWHRYLV7CRnGre+uV
> > 
> > a=crypto:9 NULL_HMAC_SHA1_80
> > inline:TP2aKDSKe8G9E7kd+w7XpOhcItzd0xmBN3g06WC1
> > 
> > a=crypto:10 NULL_HMAC_SHA1_32
> > inline:xKFUEuwLpexe84KKCulBSThMx75T74U7/K7qJbKi
> > 
> > a=setup:actpass
> > 
> > 
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