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 funcion EVP_PKEY_cmp_parameters() compares the parameters of keys
+The function EVP_PKEY_cmp_parameters() compares the parameters of keys
B<a> and B<b>.
-The funcion EVP_PKEY_cmp() compares the public key components and paramters
+The function EVP_PKEY_cmp() compares the public key components and paramters
(if present) of keys B<a> and B<b>.
=head1 NOTES