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res_rtp_asterisk: Add SHA-256 support for DTLS and perform DTLS negotiation on RTCP.

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This change fixes up DTLS support in res_rtp_asterisk so it can accept and provide
a SHA-256 fingerprint, so it occurs on RTCP, and so it occurs after ICE negotiation
completes. Configuration options to chan_sip have also been added to allow behavior
to be tweaked (such as forcing the AVP type media transports in SDP).

ASTERISK-22961 #close
Reported by: Jay Jideliov

Review: https://reviewboard.asterisk.org/r/3679/


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@417677 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Joshua Colp
2014-06-30 19:42:18 +00:00
parent 1644cd874d
commit 915de454f8
7 changed files with 441 additions and 181 deletions
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10
configs/sip.conf.sample
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@@ -1032,6 +1032,8 @@ srvlookup=yes ; Enable DNS SRV lookups on outbound calls
;avpf=yes ; Enable inter-operability with media streams using the AVPF RTP profile.
; This will cause all offers and answers to use AVPF (or SAVPF). This
; option may be specified at the global or peer scope.
;force_avp=yes ; Force 'RTP/AVP', 'RTP/AVPF', 'RTP/SAVP', and 'RTP/SAVPF' to be used for
; media streams when appropriate, even if a DTLS stream is present.
;----------------------------------------- REALTIME SUPPORT ------------------------
; For additional information on ARA, the Asterisk Realtime Architecture,
; please read https://wiki.asterisk.org/wiki/display/AST/Realtime+Database+Configuration
@@ -1287,6 +1289,7 @@ srvlookup=yes ; Enable DNS SRV lookups on outbound calls
; dtlscafile
; dtlscapath
; dtlssetup
; dtlsfingerprint
;
;------------------------------------------------------------------------------
@@ -1295,7 +1298,11 @@ srvlookup=yes ; Enable DNS SRV lookups on outbound calls
; DTLS-SRTP support is available if the underlying RTP engine in use supports it.
;
; dtlsenable = yes ; Enable or disable DTLS-SRTP support
; dtlsverify = yes ; Verify that the provided peer certificate is valid
; dtlsverify = yes ; Verify that provided peer certificate and fingerprint are valid
; ; A value of 'yes' will perform both certificate and fingerprint verification
; ; A value of 'no' will perform no certificate or fingerprint verification
; ; A value of 'fingerprint' will perform ONLY fingerprint verification
; ; A value of 'certificate' will perform ONLY certficiate verification
; dtlsrekey = 60 ; Interval at which to renegotiate the TLS session and rekey the SRTP session
; ; If this is not set or the value provided is 0 rekeying will be disabled
; dtlscertfile = file ; Path to certificate file to present
@@ -1310,6 +1317,7 @@ srvlookup=yes ; Enable DNS SRV lookups on outbound calls
; ; accept connections only), and actpass (we will do both). This value will be used in
; ; the outgoing SDP when offering and for incoming SDP offers when the remote party sends
; ; actpass
; dtlsfingerprint = sha-1 ; The hash to use for the fingerprint in SDP (valid options are sha-1 and sha-256)
;[sip_proxy]
; For incoming calls only. Example: FWD (Free World Dialup)