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[Linphone-users] incoming srtp fail

From: k
Subject: [Linphone-users] incoming srtp fail
Date: Sun, 10 Dec 2017 23:04:31 +0300

I'm  trying  to  establish  SRTP  call between zoiper 1.53 android and
linphone  windows desktop 4.1.1  through my own freeswitch server that
works in proxy media mode.

Calls  from  linphone  to  zoiper  succeed  but  if I call from zoiper
linphone  displays  open  lock  (no  encryption)  and no audio sent or
received. RTP packets are neither sent or received on linphone end.

When encryption is disabled everything works.
Encrypted  calls  between  zoiper  and  other  programs (tested zoiper
desktop, eyebeam) work with the same server config.

Also  there're  some  errors  in  log about key size. Dont know if its

o=linphone 2772 2720 IN IP4
c=IN IP4
t=0 0
m=audio 7078 RTP/SAVP 112 101
a=rtpmap:112 speex/32000
a=fmtp:112 vbr=off
a=rtpmap:101 telephone-event/32000
a=crypto:5 AES_CM_128_HMAC_SHA1_80 

2017-12-10 21:55:59:963 MESSAGE Changing [server] [INVITE] transaction 
[0D9A9B20], from state [PROCEEDING] to [ACCEPTED]
2017-12-10 21:55:59:963 MESSAGE Dialog [0A8AF1A0]: now updated by transaction 
2017-12-10 21:55:59:963 MESSAGE Call 0D6F1120: moving from state 
LinphoneCallIncomingReceived to LinphoneCallConnected
2017-12-10 21:55:59:987 MESSAGE QT: "Delete notification:" 
2017-12-10 21:55:59:987 MESSAGE Linphone core [004A4AC8] notified 
2017-12-10 21:55:59:987 MESSAGE linphone_call_start_media_streams() 
call=[0D6F1120] local upload_bandwidth=[0] kbit/s; local download_bandwidth=[0] 
2017-12-10 21:55:59:987 MESSAGE Audio bandwidth for this call is 80
2017-12-10 21:55:59:987 MESSAGE Payload type [speex/32000] has explicit bitrate 
[80] kbit/s
2017-12-10 21:55:59:987 MESSAGE media_stream_set_srtp_recv_key(): key 66..8c 
stream sessions is [0840EBD0]
>2017-12-10 21:55:59:987 ERROR Key size (45) doesn't match the selected srtp 
>profile (required 46)
2017-12-10 21:55:59:987 MESSAGE media_stream_set_srtp_send_key(): key c9..6c 
stream sessions is [0840EBD0]
>2017-12-10 21:55:59:987 ERROR Key size (30) doesn't match the selected srtp 
>profile (required 46)

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