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/*
* QEMU crypto TLS anonymous credential support
*
* Copyright (c) 2015 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "crypto/tlscredsanon.h"
#include "tlscredspriv.h"
#include "qapi/error.h"
#include "qemu/module.h"
#include "qom/object_interfaces.h"
#include "trace.h"
#ifdef CONFIG_GNUTLS
#include <gnutls/gnutls.h>
static int
qcrypto_tls_creds_anon_load(QCryptoTLSCredsAnon *creds,
Error **errp)
{
g_autofree char *dhparams = NULL;
int ret;
trace_qcrypto_tls_creds_anon_load(creds,
creds->parent_obj.dir ? creds->parent_obj.dir : "<nodir>");
if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
if (qcrypto_tls_creds_get_path(&creds->parent_obj,
QCRYPTO_TLS_CREDS_DH_PARAMS,
false, &dhparams, errp) < 0) {
return -1;
}
ret = gnutls_anon_allocate_server_credentials(&creds->data.server);
if (ret < 0) {
error_setg(errp, "Cannot allocate credentials: %s",
gnutls_strerror(ret));
return -1;
}
if (qcrypto_tls_creds_get_dh_params_file(&creds->parent_obj, dhparams,
&creds->parent_obj.dh_params,
errp) < 0) {
return -1;
}
gnutls_anon_set_server_dh_params(creds->data.server,
creds->parent_obj.dh_params);
} else {
ret = gnutls_anon_allocate_client_credentials(&creds->data.client);
if (ret < 0) {
error_setg(errp, "Cannot allocate credentials: %s",
gnutls_strerror(ret));
return -1;
}
}
return 0;
}
static void
qcrypto_tls_creds_anon_unload(QCryptoTLSCredsAnon *creds)
{
if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) {
if (creds->data.client) {
gnutls_anon_free_client_credentials(creds->data.client);
creds->data.client = NULL;
}
} else {
if (creds->data.server) {
gnutls_anon_free_server_credentials(creds->data.server);
creds->data.server = NULL;
}
}
if (creds->parent_obj.dh_params) {
gnutls_dh_params_deinit(creds->parent_obj.dh_params);
creds->parent_obj.dh_params = NULL;
}
}
#else /* ! CONFIG_GNUTLS */
static void
qcrypto_tls_creds_anon_load(QCryptoTLSCredsAnon *creds G_GNUC_UNUSED,
Error **errp)
{
error_setg(errp, "TLS credentials support requires GNUTLS");
}
static void
qcrypto_tls_creds_anon_unload(QCryptoTLSCredsAnon *creds G_GNUC_UNUSED)
{
/* nada */
}
#endif /* ! CONFIG_GNUTLS */
static void
qcrypto_tls_creds_anon_prop_set_loaded(Object *obj,
bool value,
Error **errp)
{
QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
qcrypto_tls_creds_anon_unload(creds);
if (value) {
qcrypto_tls_creds_anon_load(creds, errp);
}
}
#ifdef CONFIG_GNUTLS
static bool
qcrypto_tls_creds_anon_prop_get_loaded(Object *obj,
Error **errp G_GNUC_UNUSED)
{
QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
return creds->data.server != NULL;
} else {
return creds->data.client != NULL;
}
}
#else /* ! CONFIG_GNUTLS */
static bool
qcrypto_tls_creds_anon_prop_get_loaded(Object *obj G_GNUC_UNUSED,
Error **errp G_GNUC_UNUSED)
{
return false;
}
#endif /* ! CONFIG_GNUTLS */
static void
qcrypto_tls_creds_anon_complete(UserCreatable *uc, Error **errp)
{
object_property_set_bool(OBJECT(uc), "loaded", true, errp);
}
static void
qcrypto_tls_creds_anon_finalize(Object *obj)
{
QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
qcrypto_tls_creds_anon_unload(creds);
}
static void
qcrypto_tls_creds_anon_class_init(ObjectClass *oc, void *data)
{
UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
ucc->complete = qcrypto_tls_creds_anon_complete;
object_class_property_add_bool(oc, "loaded",
qcrypto_tls_creds_anon_prop_get_loaded,
qcrypto_tls_creds_anon_prop_set_loaded);
}
static const TypeInfo qcrypto_tls_creds_anon_info = {
.parent = TYPE_QCRYPTO_TLS_CREDS,
.name = TYPE_QCRYPTO_TLS_CREDS_ANON,
.instance_size = sizeof(QCryptoTLSCredsAnon),
.instance_finalize = qcrypto_tls_creds_anon_finalize,
.class_size = sizeof(QCryptoTLSCredsAnonClass),
.class_init = qcrypto_tls_creds_anon_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
{ }
}
};
static void
qcrypto_tls_creds_anon_register_types(void)
{
type_register_static(&qcrypto_tls_creds_anon_info);
}
type_init(qcrypto_tls_creds_anon_register_types);
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