[asterisk-bugs] [JIRA] (ASTERISK-20662) Incoming SRTP calls that specify a key lifetime fail

[Matt Jordan (JIRA)]

Matt Jordan created ASTERISK-20662:
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             Summary: Incoming SRTP calls that specify a key lifetime fail
                 Key: ASTERISK-20662
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20662
             Project: Asterisk
          Issue Type: Bug
          Components: Channels/chan_sip/SRTP
            Reporter: Terry Wilson
            Severity: Minor


Asterisk's SRTP implementation does not understand the key lifetime attribute in an a=cyrpto line. Since some phones specify this (and are not configurable in this regard), Asterisk really needs to implement support for this.

****** STEPS TO REPRODUCE ******

I believe recent Grandstream firmware releases send this parameter. Any call with this specified will be rejected by Asterisk.

****** ADDITIONAL INFORMATION ******

The default key lifetime for AES_CM_128_HMAC_SHA1_32 or 80 is 2^48 SRTP packets (or 2^31 SRTCP packets whichever comes first). At 50 packets/second this is 178,391 years...a decidedly long call.

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