=head1 NAME
-EVP_PKEY_copy_parameters, EVP_PKEY_missing_parameters, EVP_PKEY_cmp_parameters, EVP_PKEY_cmp - public key parameter and comparison functions
+EVP_PKEY_copy_parameters, EVP_PKEY_missing_parameters, EVP_PKEY_cmp_parameters,
+EVP_PKEY_cmp - public key parameter and comparison functions
=head1 SYNOPSIS
doesn't use parameters.
The function EVP_PKEY_copy_parameters() copies the parameters from key
-B<from> to key B<to>.
+B<from> to key B<to>. An error is returned if the parameters are missing in
+B<from> or present in both B<from> and B<to> and mismatch. If the parameters
+in B<from> and B<to> are both present and match this function has no effect.
The function EVP_PKEY_cmp_parameters() compares the parameters of keys
B<a> and B<b>.
L<EVP_PKEY_CTX_new(3)>,
L<EVP_PKEY_keygen(3)>
-=cut
-
=head1 COPYRIGHT
Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.