- adds count pv and sel for DNS, EMAIL, IP, URI - adds ability to access SAN entries by index

fix #3400

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#### Description Fix issue #3400 that describes that tls module cannot properly handle certificates with multiple SAN entries.

Add ability to access SAN entries by index.

Add ability to get count of supported SAN entries by type of entry.

If index is not provided will return first entry (current behavior to remain backwards compatible.

Tested by creating a self signed SAN cert with 3 DNS entries and confirmed expected results for:

$(tls_peer_san_hostname[2]) $(tls_peer_san_hostname); $tls_peer_san_count(DNS) $tls_peer_san_count(URI) $tls_peer_san_count(EMAIL) $tls_peer_san_count(IP) $sel(tls.peer.dns[1]) $sel(tls.peer.dns) $sel(tls.peer.count["DNS"]) $(tls_peer_san_ip[0]) $(tls_peer_san_uri) $sel(tls.peer.ip[0]) $sel(tls.peer.count["EMAIL"]) $(tls_my_san_hostname[2]) $(tls_my_san_hostname) $tls_my_san_count(DNS) $tls_my_san_count(URI) $tls_my_san_count(EMAIL) $tls_my_san_count(IP) $sel(tls.my.dns[1]) $sel(tls.my.dns) $sel(tls.my.count["DNS"] $(tls_my_san_ip[0])] $(tls_my_san_uri) $sel(tls.my.ip[0]) $sel(tls.my.count["EMAIL"])

Also repeated the test with a self signed cert with 3 DNS entries, 1 IP entry, 1 EMAIL entry and 1 URI entry You can view, comment on, or merge this pull request online at:

https://github.com/kamailio/kamailio/pull/3408

-- Commit Summary --

* tls: get san entries by index

-- File Changes --

M src/modules/tls/tls_select.c (314)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/3408.patch https://github.com/kamailio/kamailio/pull/3408.diff