present in the I<subject> certificate and checks B<keyUsage> field of
I<issuer>.
-=head1 RETURN VALUE
+=head1 RETURN VALUES
Function return B<X509_V_OK> if certificate I<subject> is issued by
I<issuer> or some B<X509_V_ERR*> constant to indicate an error.
=head1 COPYRIGHT
-Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
-Licensed under the OpenSSL license (the "License"). You may not use
+Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.