[asterisk-bugs] [JIRA] (ASTERISK-22961) [patch] DTLS-SRTP not working with SHA-256

[Jay Jideliov (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-22961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=213694#comment-213694 ] 

Jay Jideliov commented on ASTERISK-22961:
-----------------------------------------

Nitesh,

Thank you for the updated patch. Two questions:

1) You have mentioned a JS hack to replace RTP/SAVPF in SDP with UDP/TLS/RTP/SAVPF. Can you please share it here? It will be greatly appreciated since I am also trying to get it to work.

2) Have you tested it with 11.6/11.7? Since 11.4 is quite outdated, I think it would be more beneficial to test it on some of the more recent versions of Asterisk to try to get this patch rolled out in the next release. That being said, me and my team would gladly participate in the testing once the appropriate patch is provided.


Thanks. 
                
> [patch] DTLS-SRTP not working with SHA-256
> ------------------------------------------
>
>                 Key: ASTERISK-22961
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-22961
>             Project: Asterisk
>          Issue Type: Improvement
>      Security Level: None
>          Components: Channels/chan_sip/SRTP, Channels/chan_sip/WebSocket
>    Affects Versions: 11.6.0, 12.0.0-beta2
>            Reporter: Jay Jideliov
>         Attachments: asterisk_dtls.patch, chan_sip.c, ice_session.c, res_rtp_asterisk.c, res_rtp_asterisk.c, srtp_dtls.patch
>
>
> Recently it became possible to use websocket on asterisk without a proxy previously necessary to make calls from the web browser. Although partial support has been added, full browser cross-operability has not been achieved yet. However, it seems to be a relatively easy task.
> Tested on Chrome+SIPML5+Asterisk 11, the connection can be established and works fine. However, due to the fact that Firefox sends SHA-256 packets which are not supported by asterisk, hence the support for this browser is limited by this issue.
> Step 1: Adding certificates to support DTLS
> dtlsenable = yes
> dtlsverify = no
> dtlscertfile=/etc/asterisk/keys/softphone.pem
> dtlsprivatekey=/etc/asterisk/keys/key.pem
> dtlscafile=/etc/asterisk/keys/key.pem
> Step 2: Making a call
> [Nov 25 15:05:50] WARNING[5628][C-0000005c]: chan_sip.c:11034 process_sdp_a_dtls: Unsupported fingerprint hash type 'sha-2' received on dialog '38f43a1f-15cd-ad69-c2b3-72c21b9de5fd'

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