/* Leave the BIO_METH for now. It may get reused and we don't want to
* have to call BIO_get_new_index() more times than is necessary */
}
+
+int cert_auth_challenge_response(struct openconnect_info *vpninfo,
+ int cert_rq, const char *challenge, char **identity,
+ struct challenge_response *response)
+{
+ /* hush not used warnings */
+ (void) cert_rq;
+ (void) challenge;
+ (void) identity;
+ (void) response;
+
+ vpn_progress(vpninfo, PRG_ERR,
+ _("Multiple certificate-based authentication"
+ " is not implemented for OpenSSL\n"));
+
+ return -ENOSYS;
+}