Merge remote-tracking branch 'remotes/kraxel/tags/pull-vga-20170103-1' 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 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 "crypto/tlscredspriv.h"
24 #include "qapi/error.h"
25 #include "qom/object_interfaces.h"
26 #include "trace.h"
27
28
29 #ifdef CONFIG_GNUTLS
30
31
32 static int
33 qcrypto_tls_creds_anon_load(QCryptoTLSCredsAnon *creds,
34 Error **errp)
35 {
36 char *dhparams = NULL;
37 int ret;
38 int rv = -1;
39
40 trace_qcrypto_tls_creds_anon_load(creds,
41 creds->parent_obj.dir ? creds->parent_obj.dir : "<nodir>");
42
43 if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
44 if (qcrypto_tls_creds_get_path(&creds->parent_obj,
45 QCRYPTO_TLS_CREDS_DH_PARAMS,
46 false, &dhparams, errp) < 0) {
47 goto cleanup;
48 }
49
50 ret = gnutls_anon_allocate_server_credentials(&creds->data.server);
51 if (ret < 0) {
52 error_setg(errp, "Cannot allocate credentials: %s",
53 gnutls_strerror(ret));
54 goto cleanup;
55 }
56
57 if (qcrypto_tls_creds_get_dh_params_file(&creds->parent_obj, dhparams,
58 &creds->parent_obj.dh_params,
59 errp) < 0) {
60 goto cleanup;
61 }
62
63 gnutls_anon_set_server_dh_params(creds->data.server,
64 creds->parent_obj.dh_params);
65 } else {
66 ret = gnutls_anon_allocate_client_credentials(&creds->data.client);
67 if (ret < 0) {
68 error_setg(errp, "Cannot allocate credentials: %s",
69 gnutls_strerror(ret));
70 goto cleanup;
71 }
72 }
73
74 rv = 0;
75 cleanup:
76 g_free(dhparams);
77 return rv;
78 }
79
80
81 static void
82 qcrypto_tls_creds_anon_unload(QCryptoTLSCredsAnon *creds)
83 {
84 if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) {
85 if (creds->data.client) {
86 gnutls_anon_free_client_credentials(creds->data.client);
87 creds->data.client = NULL;
88 }
89 } else {
90 if (creds->data.server) {
91 gnutls_anon_free_server_credentials(creds->data.server);
92 creds->data.server = NULL;
93 }
94 }
95 if (creds->parent_obj.dh_params) {
96 gnutls_dh_params_deinit(creds->parent_obj.dh_params);
97 creds->parent_obj.dh_params = NULL;
98 }
99 }
100
101 #else /* ! CONFIG_GNUTLS */
102
103
104 static void
105 qcrypto_tls_creds_anon_load(QCryptoTLSCredsAnon *creds G_GNUC_UNUSED,
106 Error **errp)
107 {
108 error_setg(errp, "TLS credentials support requires GNUTLS");
109 }
110
111
112 static void
113 qcrypto_tls_creds_anon_unload(QCryptoTLSCredsAnon *creds G_GNUC_UNUSED)
114 {
115 /* nada */
116 }
117
118
119 #endif /* ! CONFIG_GNUTLS */
120
121
122 static void
123 qcrypto_tls_creds_anon_prop_set_loaded(Object *obj,
124 bool value,
125 Error **errp)
126 {
127 QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
128
129 if (value) {
130 qcrypto_tls_creds_anon_load(creds, errp);
131 } else {
132 qcrypto_tls_creds_anon_unload(creds);
133 }
134 }
135
136
137 #ifdef CONFIG_GNUTLS
138
139
140 static bool
141 qcrypto_tls_creds_anon_prop_get_loaded(Object *obj,
142 Error **errp G_GNUC_UNUSED)
143 {
144 QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
145
146 if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
147 return creds->data.server != NULL;
148 } else {
149 return creds->data.client != NULL;
150 }
151 }
152
153
154 #else /* ! CONFIG_GNUTLS */
155
156
157 static bool
158 qcrypto_tls_creds_anon_prop_get_loaded(Object *obj G_GNUC_UNUSED,
159 Error **errp G_GNUC_UNUSED)
160 {
161 return false;
162 }
163
164
165 #endif /* ! CONFIG_GNUTLS */
166
167
168 static void
169 qcrypto_tls_creds_anon_complete(UserCreatable *uc, Error **errp)
170 {
171 object_property_set_bool(OBJECT(uc), true, "loaded", errp);
172 }
173
174
175 static void
176 qcrypto_tls_creds_anon_finalize(Object *obj)
177 {
178 QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
179
180 qcrypto_tls_creds_anon_unload(creds);
181 }
182
183
184 static void
185 qcrypto_tls_creds_anon_class_init(ObjectClass *oc, void *data)
186 {
187 UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
188
189 ucc->complete = qcrypto_tls_creds_anon_complete;
190
191 object_class_property_add_bool(oc, "loaded",
192 qcrypto_tls_creds_anon_prop_get_loaded,
193 qcrypto_tls_creds_anon_prop_set_loaded,
194 NULL);
195 }
196
197
198 static const TypeInfo qcrypto_tls_creds_anon_info = {
199 .parent = TYPE_QCRYPTO_TLS_CREDS,
200 .name = TYPE_QCRYPTO_TLS_CREDS_ANON,
201 .instance_size = sizeof(QCryptoTLSCredsAnon),
202 .instance_finalize = qcrypto_tls_creds_anon_finalize,
203 .class_size = sizeof(QCryptoTLSCredsAnonClass),
204 .class_init = qcrypto_tls_creds_anon_class_init,
205 .interfaces = (InterfaceInfo[]) {
206 { TYPE_USER_CREATABLE },
207 { }
208 }
209 };
210
211
212 static void
213 qcrypto_tls_creds_anon_register_types(void)
214 {
215 type_register_static(&qcrypto_tls_creds_anon_info);
216 }
217
218
219 type_init(qcrypto_tls_creds_anon_register_types);