=head1 DESCRIPTION
-ossl_cmp_msg_protect() protects the given message B<msg> using an algorithm
+ossl_cmp_msg_protect() (re-)protects the given message B<msg> using an algorithm
depending on the available context information given in the B<ctx>.
-If there is a secretValue it selects PBMAC. Else if there is a clCert
+If there is a secretValue it selects PBMAC, else if there is a clCert
it selects Signature and uses B<ossl_cmp_msg_add_extraCerts()>.
It also sets the protectionAlg field in the message header accordingly.