Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20210921' into staging
[qemu.git] / crypto / tlscredsanon.c
1 /*
2 * QEMU crypto TLS anonymous credential support
3 *
4 * Copyright (c) 2015 Red Hat, Inc.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 *
19 */
20
21 #include "qemu/osdep.h"
22 #include "crypto/tlscredsanon.h"
23 #include "tlscredspriv.h"
24 #include "qapi/error.h"
25 #include "qemu/module.h"
26 #include "qom/object_interfaces.h"
27 #include "trace.h"
28
29
30 #ifdef CONFIG_GNUTLS
31
32 #include <gnutls/gnutls.h>
33
34
35 static int
36 qcrypto_tls_creds_anon_load(QCryptoTLSCredsAnon *creds,
37 Error **errp)
38 {
39 g_autofree char *dhparams = NULL;
40 int ret;
41
42 trace_qcrypto_tls_creds_anon_load(creds,
43 creds->parent_obj.dir ? creds->parent_obj.dir : "<nodir>");
44
45 if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
46 if (qcrypto_tls_creds_get_path(&creds->parent_obj,
47 QCRYPTO_TLS_CREDS_DH_PARAMS,
48 false, &dhparams, errp) < 0) {
49 return -1;
50 }
51
52 ret = gnutls_anon_allocate_server_credentials(&creds->data.server);
53 if (ret < 0) {
54 error_setg(errp, "Cannot allocate credentials: %s",
55 gnutls_strerror(ret));
56 return -1;
57 }
58
59 if (qcrypto_tls_creds_get_dh_params_file(&creds->parent_obj, dhparams,
60 &creds->parent_obj.dh_params,
61 errp) < 0) {
62 return -1;
63 }
64
65 gnutls_anon_set_server_dh_params(creds->data.server,
66 creds->parent_obj.dh_params);
67 } else {
68 ret = gnutls_anon_allocate_client_credentials(&creds->data.client);
69 if (ret < 0) {
70 error_setg(errp, "Cannot allocate credentials: %s",
71 gnutls_strerror(ret));
72 return -1;
73 }
74 }
75
76 return 0;
77 }
78
79
80 static void
81 qcrypto_tls_creds_anon_unload(QCryptoTLSCredsAnon *creds)
82 {
83 if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) {
84 if (creds->data.client) {
85 gnutls_anon_free_client_credentials(creds->data.client);
86 creds->data.client = NULL;
87 }
88 } else {
89 if (creds->data.server) {
90 gnutls_anon_free_server_credentials(creds->data.server);
91 creds->data.server = NULL;
92 }
93 }
94 if (creds->parent_obj.dh_params) {
95 gnutls_dh_params_deinit(creds->parent_obj.dh_params);
96 creds->parent_obj.dh_params = NULL;
97 }
98 }
99
100 #else /* ! CONFIG_GNUTLS */
101
102
103 static void
104 qcrypto_tls_creds_anon_load(QCryptoTLSCredsAnon *creds G_GNUC_UNUSED,
105 Error **errp)
106 {
107 error_setg(errp, "TLS credentials support requires GNUTLS");
108 }
109
110
111 static void
112 qcrypto_tls_creds_anon_unload(QCryptoTLSCredsAnon *creds G_GNUC_UNUSED)
113 {
114 /* nada */
115 }
116
117
118 #endif /* ! CONFIG_GNUTLS */
119
120
121 static void
122 qcrypto_tls_creds_anon_prop_set_loaded(Object *obj,
123 bool value,
124 Error **errp)
125 {
126 QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
127
128 qcrypto_tls_creds_anon_unload(creds);
129 if (value) {
130 qcrypto_tls_creds_anon_load(creds, errp);
131 }
132 }
133
134
135 #ifdef CONFIG_GNUTLS
136
137
138 static bool
139 qcrypto_tls_creds_anon_prop_get_loaded(Object *obj,
140 Error **errp G_GNUC_UNUSED)
141 {
142 QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
143
144 if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
145 return creds->data.server != NULL;
146 } else {
147 return creds->data.client != NULL;
148 }
149 }
150
151
152 #else /* ! CONFIG_GNUTLS */
153
154
155 static bool
156 qcrypto_tls_creds_anon_prop_get_loaded(Object *obj G_GNUC_UNUSED,
157 Error **errp G_GNUC_UNUSED)
158 {
159 return false;
160 }
161
162
163 #endif /* ! CONFIG_GNUTLS */
164
165
166 static void
167 qcrypto_tls_creds_anon_complete(UserCreatable *uc, Error **errp)
168 {
169 object_property_set_bool(OBJECT(uc), "loaded", true, errp);
170 }
171
172
173 static void
174 qcrypto_tls_creds_anon_finalize(Object *obj)
175 {
176 QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
177
178 qcrypto_tls_creds_anon_unload(creds);
179 }
180
181
182 static void
183 qcrypto_tls_creds_anon_class_init(ObjectClass *oc, void *data)
184 {
185 UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
186
187 ucc->complete = qcrypto_tls_creds_anon_complete;
188
189 object_class_property_add_bool(oc, "loaded",
190 qcrypto_tls_creds_anon_prop_get_loaded,
191 qcrypto_tls_creds_anon_prop_set_loaded);
192 }
193
194
195 static const TypeInfo qcrypto_tls_creds_anon_info = {
196 .parent = TYPE_QCRYPTO_TLS_CREDS,
197 .name = TYPE_QCRYPTO_TLS_CREDS_ANON,
198 .instance_size = sizeof(QCryptoTLSCredsAnon),
199 .instance_finalize = qcrypto_tls_creds_anon_finalize,
200 .class_size = sizeof(QCryptoTLSCredsAnonClass),
201 .class_init = qcrypto_tls_creds_anon_class_init,
202 .interfaces = (InterfaceInfo[]) {
203 { TYPE_USER_CREATABLE },
204 { }
205 }
206 };
207
208
209 static void
210 qcrypto_tls_creds_anon_register_types(void)
211 {
212 type_register_static(&qcrypto_tls_creds_anon_info);
213 }
214
215
216 type_init(qcrypto_tls_creds_anon_register_types);