[asterisk-bugs] [JIRA] (ASTERISK-24911) No Voice with Firefox-37 as DTLS handshake is not completing

[Ajay Choudary (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-24911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=225638#comment-225638 ] 

Ajay Choudary commented on ASTERISK-24911:
------------------------------------------

Hi Folks,

This issue is fixed by altering hash function to lower case in "a=fingerprint" SDP line.

Code changes in add_dtls_to_sdp function (chan_sip.c) :
- ast_str_append(a_buf, 0, "a=fingerprint:%s %s\r\n", hash == AST_RTP_DTLS_HASH_SHA1 ? "SHA-1" : "SHA-256", fingerprint);
+ ast_str_append(a_buf, 0, "a=fingerprint:%s %s\r\n", hash == AST_RTP_DTLS_HASH_SHA1 ? "sha-1" : "sha-256", fingerprint);

With the above change DTLS handshake is completing successfully.
Please the release the patch ASAP. (Expected Firefox-37 release date is 31st March'15).

Reference links: https://groups.google.com/forum/#!topic/discuss-webrtc/seAJiN8Z2-Y
https://bugzilla.mozilla.org/show_bug.cgi?id=1147919.

Regards,
AjayG


> No Voice with Firefox-37 as DTLS handshake is not completing
> ------------------------------------------------------------
>
>                 Key: ASTERISK-24911
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-24911
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_rtp_asterisk
>    Affects Versions: 11.11.0, 13.2.0
>         Environment: CentOS 6.5 / 7
>            Reporter: Ajay Choudary
>            Assignee: Ajay Choudary
>            Severity: Critical
>
> In DTLS Connect mode Firefox(37/38) is not responding for Client Hello. The same setup is working fine for Firefox Stable (<= 36) & Chrome Canary (<=43). No Error logs are observed in Asterisk. No Error Responses from Firefox. Tested with Asterisk 11 and 13. Firefox 37 (current beta channel) is going to release by 03-31-2015, as per the release calendar. So all the Asterisk WebRTC Gateways will going to effected by next couple of days with Firefox Update.
> Note: When i tested with SIPml5 in Firefox-37 with (webrtc2sip+doubango) it is working fine, so issue is with Asterisk only



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