The TLS context cannot be created because the Debian Bookworm libldap-2.5-0 package is built with the GnuTLS stack instead of the OpenSSL TLS stack.
I manually built and installed libldap-2.5 linked to the OpenSSL libssl and libcrypto libraries and the TLS connection is now successfully established based on client certificates. It would be very helpful if the Debian project would make available an alternative libldap-2.5-openssl package as is the case e.g. with the libcurl4 package that comes with gnutls, nss and openssl flavors. Best regards Andreas
