=head1 NOTES
+When a client obtains from a CMP server CA certificates that it is going to
+trust, for instance via the C<caPubs> field of a certificate response,
+authentication of the CMP server is particularly critical.
+So special care must be taken setting up server authentication
+using B<-trusted> and related options for certificate-based authentication
+or B<-secret> for MAC-based protection.
+
When setting up CMP configurations and experimenting with enrollment options
typically various errors occur until the configuration is correct and complete.
When the CMP server reports an error the client will by default
The CMP client implementation is limited to one request per CMP message
(and consequently to at most one response component per CMP message).
+When a client obtains from a CMP server CA certificates that it is going to
+trust, for instance via the caPubs field of a certificate response,
+authentication of the CMP server is particularly critical.
+So special care must be taken setting up server authentication in I<ctx>
+using functions such as
+L<OSSL_CMP_CTX_set0_trustedStore(3)> (for certificate-based authentication) or
+L<OSSL_CMP_CTX_set1_secretValue(3)> (for MAC-based protection).
+
=head1 RETURN VALUES
OSSL_CMP_exec_certreq(), OSSL_CMP_exec_IR_ses(), OSSL_CMP_exec_CR_ses(),