Implemented SRTP_AEAD_AES_256_GCM

This adds missing bits for
SRTP_AEAD_AES_256_GCM and updates
srtp module to v2.0.14.

Author: digitalix

constants.go

@@ -39,5 +39,5 @@ const (
 )
 
 func defaultSrtpProtectionProfiles() []dtls.SRTPProtectionProfile {
-	return []dtls.SRTPProtectionProfile{dtls.SRTP_AEAD_AES_128_GCM, dtls.SRTP_AES128_CM_HMAC_SHA1_80}
+	return []dtls.SRTPProtectionProfile{dtls.SRTP_AEAD_AES_256_GCM, dtls.SRTP_AEAD_AES_128_GCM, dtls.SRTP_AES128_CM_HMAC_SHA1_80}
 }

dtlstransport.go

@@ -361,6 +361,8 @@ func (t *DTLSTransport) Start(remoteParameters DTLSParameters) error {
 	switch srtpProfile {
 	case dtls.SRTP_AEAD_AES_128_GCM:
 		t.srtpProtectionProfile = srtp.ProtectionProfileAeadAes128Gcm
+	case dtls.SRTP_AEAD_AES_256_GCM:
+		t.srtpProtectionProfile = srtp.ProtectionProfileAeadAes256Gcm
 	case dtls.SRTP_AES128_CM_HMAC_SHA1_80:
 		t.srtpProtectionProfile = srtp.ProtectionProfileAes128CmHmacSha1_80
 	default:

go.mod

@@ -15,7 +15,7 @@ require (
 	github.com/pion/rtp v1.7.13
 	github.com/pion/sctp v1.8.7
 	github.com/pion/sdp/v3 v3.0.6
-	github.com/pion/srtp/v2 v2.0.13
+	github.com/pion/srtp/v2 v2.0.14
 	github.com/pion/stun v0.5.2
 	github.com/pion/transport/v2 v2.2.0
 	github.com/sclevine/agouti v3.0.0+incompatible

go.sum

@@ -63,8 +63,8 @@ github.com/pion/sctp v1.8.7 h1:JnABvFakZueGAn4KU/4PSKg+GWbF6QWbKTWZOSGJjXw=
 github.com/pion/sctp v1.8.7/go.mod h1:g1Ul+ARqZq5JEmoFy87Q/4CePtKnTJ1QCL9dBBdN6AU=
 github.com/pion/sdp/v3 v3.0.6 h1:WuDLhtuFUUVpTfus9ILC4HRyHsW6TdugjEX/QY9OiUw=
 github.com/pion/sdp/v3 v3.0.6/go.mod h1:iiFWFpQO8Fy3S5ldclBkpXqmWy02ns78NOKoLLL0YQw=
-github.com/pion/srtp/v2 v2.0.13 h1:GJQNMCqbYrNIBt1f3maX+E+woREVh2ilhAafBh0vqmk=
-github.com/pion/srtp/v2 v2.0.13/go.mod h1:FA7u5fWpVITMYNL70TA3csQuMQJA5/+6ZMajGxveHgM=
+github.com/pion/srtp/v2 v2.0.14 h1:Glt0MqEvINrDxL+aanmK4DiFjvs+uN2iYc6XD/iKpoY=
+github.com/pion/srtp/v2 v2.0.14/go.mod h1:b/pQOlDrbB0HEH5EUAQXzSYxikFbNcNuKmF8tM0hCtw=
 github.com/pion/stun v0.4.0/go.mod h1:QPsh1/SbXASntw3zkkrIk3ZJVKz4saBY2G7S10P3wCw=
 github.com/pion/stun v0.5.2 h1:J/8glQnDV91dfk2+ZnGN0o9bUJgABhTNljwfQWByoXE=
 github.com/pion/stun v0.5.2/go.mod h1:TNo1HjyjaFVpMZsvowqPeV8TfwRytympQC0//neaksA=