Check_MK Werk 8647: cmk-update-agent: Fixed certificate verification issues in case openssl tools are not available

ID: 8647 Title: cmk-update-agent: Fixed certificate verification issues in case openssl tools are not available Component: Agent Bakery Level: 1 Class: Bug Fix Version: 1.4.0i3 When communicating via HTTPS with the update server, the cmk-update-agent script needs to verify the certificates of the server. The allowed certificates are stored at <tt>/var/lib/check_mk_agent/cas</tt>. In this directory there need to be the certificates (.pem files) and symlinks named with the "subject hashes" of the certificates. In previous versions these symlinks were created by the <tt>c_rehash</tt> command which is not available on all plaftforms. We have changed that now to use the python OpenSSL bindings (if available) and fallback to the c_rehash command only in case they are not available.