The system-wide crypto-policies were introduced in Fedora 21 in 2014. Since that time the tool evolved a lot especially with the recent introduction of run-time generation of configuration from a policy definition file and introduction of sub-policy concept. The feature is called Custom crypto policies. The crypto-policies nowadays help management of crypto algorithms not only in Fedora but also in Red Hat Enterprise Linux 8. It will be shown how the policy definition file looks like and how it is converted to the actual crypto library configuration.