FreeBSD 11.0 - man page for hx509_lock (freebsd section 3)
hx509 lock functions(3) Heimdalx509library hx509 lock functions(3)NAMEhx509 lock functions - See the Locking and unlocking certificates and encrypted data. for description and examples. Version 1.5.2 11 Jan 2012 hx509 lock functions(3)