@c gnutls_ctype_target_t
@table @code
@item GNUTLS_@-CTYPE_@-CLIENT
for requesting client certificate type values.
@item GNUTLS_@-CTYPE_@-SERVER
for requesting server certificate type values.
@item GNUTLS_@-CTYPE_@-OURS
for requesting our certificate type values.
@item GNUTLS_@-CTYPE_@-PEERS
for requesting the peers' certificate type values.
@end table