[Freeswitch-users] zrtp HS80 not supported?

Peter Villeneuve petervnv1 at gmail.com
Sun Jan 24 22:52:26 MSK 2016

Hi guys,

I'm testing out FS' zrtp implementation with a zrtp enabled softphone and I
found the following in the FS logs:

2016-01-24 18:59:31.761752 [DEBUG] switch_rtp.c:1370 [zrtp respond]:
Preparse incoming COMMIT. Remote peer wants DH3k:2 mode lic=1 peer M=0.
2016-01-24 18:59:31.761752 [DEBUG] switch_rtp.c:1370 [zrtp respond]: INFO:
Authtag HS80 isn't supported by profile. ID=0
2016-01-24 18:59:31.761752 [DEBUG] switch_rtp.c:1370 [ zrtp engine]: Enter
InitiatingError State with ERROR:, notification Enabled. ID=0

Looking through the source at zrtp_crypto_atl.c I see that HS80 should be
supported as well as the more common HS32:

atl80->base.id= ZRTP_ATL_HS80;

Anyone know what I'm doing wrong? I would expect FS to detect the HS_80
hash length and negotiate zrtp with the endpoint but it doesn't seem to be
working. Is there any config file for zrtp in FS that I should be looking

Any clues?

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