kamailio-docs/kamailio-kemi-framework/docs/modules/tls/tls.cget.md

Return values corresponding the pseudo-variables exported by TLS module, related to TLS connection and certificates. The parameter has to be the name of the pseudo-variable (without $).

Example:

local vPeerSubjectCn = KSR.tls.cget("tls_peer_subject_cn");