=item B<2 X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: unable to get issuer certificate>
-the issuer certificate could not be found: this occurs if the issuer certificate
-of an untrusted certificate cannot be found.
+the issuer certificate of a looked up certificate could not be found. This
+normally means the list of trusted certificates is not complete.
=item B<3 X509_V_ERR_UNABLE_TO_GET_CRL: unable to get certificate CRL>
=item B<20 X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: unable to get local issuer certificate>
-the issuer certificate of a locally looked up certificate could not be found. This normally means
-the list of trusted certificates is not complete.
+the issuer certificate could not be found: this occurs if the issuer
+certificate of an untrusted certificate cannot be found.
=item B<21 X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: unable to verify the first certificate>
Previous versions of OpenSSL assume certificates with matching subject name are identical and
mishandled them.
+Previous versions of this documentation swapped the meaning of the
+B<X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT> and
+B<20 X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY> error codes.
+
=head1 SEE ALSO
L<x509(1)|x509(1)>