tree 8ec48a0765e8b18ee0d0c9fdbb2847fae91be3ff
parent bdfb41a04c3b427d1c24ea26e94269f6a38fd712
author Jay Satiro <raysatiro@yahoo.com> 1715918841 -0400
committer Jay Satiro <raysatiro@yahoo.com> 1716191740 -0400

openssl: revert keylog_callback support for LibreSSL

- Revert to the legacy TLS 1.2 key logging code for LibreSSL.

- Document SSLKEYLOGFILE for LibreSSL is TLS 1.2 max.

Prior to this change if the user specified a filename in the
SSLKEYLOGFILE environment variable and was using LibreSSL 3.5.0+ then
an empty file would be created and no keys would be logged.

This is effectively a revert of e43474b4 which changed openssl.c to use
SSL_CTX_set_keylog_callback for LibreSSL 3.5.0+. Unfortunately LibreSSL
added that function only as a stub that doesn't actually do anything.

Reported-by: Gonçalo Carvalho

Fixes https://github.com/curl/curl/issues/13672
Closes https://github.com/curl/curl/pull/13682