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 | |
33 | static int |
34 | qcrypto_tls_creds_anon_load(QCryptoTLSCredsAnon *creds, |
35 | Error **errp) |
36 | { |
37 | g_autofree char *dhparams = NULL; |
38 | int ret; |
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 | return -1; |
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 | return -1; |
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 | return -1; |
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 | return -1; |
71 | } |
72 | } |
73 | |
74 | return 0; |
75 | } |
76 | |
77 | |
78 | static void |
79 | qcrypto_tls_creds_anon_unload(QCryptoTLSCredsAnon *creds) |
80 | { |
81 | if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { |
82 | if (creds->data.client) { |
83 | gnutls_anon_free_client_credentials(creds->data.client); |
84 | creds->data.client = NULL; |
85 | } |
86 | } else { |
87 | if (creds->data.server) { |
88 | gnutls_anon_free_server_credentials(creds->data.server); |
89 | creds->data.server = NULL; |
90 | } |
91 | } |
92 | if (creds->parent_obj.dh_params) { |
93 | gnutls_dh_params_deinit(creds->parent_obj.dh_params); |
94 | creds->parent_obj.dh_params = NULL; |
95 | } |
96 | } |
97 | |
98 | #else /* ! CONFIG_GNUTLS */ |
99 | |
100 | |
101 | static void |
102 | qcrypto_tls_creds_anon_load(QCryptoTLSCredsAnon *creds G_GNUC_UNUSED, |
103 | Error **errp) |
104 | { |
105 | error_setg(errp, "TLS credentials support requires GNUTLS" ); |
106 | } |
107 | |
108 | |
109 | static void |
110 | qcrypto_tls_creds_anon_unload(QCryptoTLSCredsAnon *creds G_GNUC_UNUSED) |
111 | { |
112 | /* nada */ |
113 | } |
114 | |
115 | |
116 | #endif /* ! CONFIG_GNUTLS */ |
117 | |
118 | |
119 | static void |
120 | qcrypto_tls_creds_anon_prop_set_loaded(Object *obj, |
121 | bool value, |
122 | Error **errp) |
123 | { |
124 | QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj); |
125 | |
126 | if (value) { |
127 | qcrypto_tls_creds_anon_load(creds, errp); |
128 | } else { |
129 | qcrypto_tls_creds_anon_unload(creds); |
130 | } |
131 | } |
132 | |
133 | |
134 | #ifdef CONFIG_GNUTLS |
135 | |
136 | |
137 | static bool |
138 | qcrypto_tls_creds_anon_prop_get_loaded(Object *obj, |
139 | Error **errp G_GNUC_UNUSED) |
140 | { |
141 | QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj); |
142 | |
143 | if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { |
144 | return creds->data.server != NULL; |
145 | } else { |
146 | return creds->data.client != NULL; |
147 | } |
148 | } |
149 | |
150 | |
151 | #else /* ! CONFIG_GNUTLS */ |
152 | |
153 | |
154 | static bool |
155 | qcrypto_tls_creds_anon_prop_get_loaded(Object *obj G_GNUC_UNUSED, |
156 | Error **errp G_GNUC_UNUSED) |
157 | { |
158 | return false; |
159 | } |
160 | |
161 | |
162 | #endif /* ! CONFIG_GNUTLS */ |
163 | |
164 | |
165 | static void |
166 | qcrypto_tls_creds_anon_complete(UserCreatable *uc, Error **errp) |
167 | { |
168 | object_property_set_bool(OBJECT(uc), true, "loaded" , errp); |
169 | } |
170 | |
171 | |
172 | static void |
173 | qcrypto_tls_creds_anon_finalize(Object *obj) |
174 | { |
175 | QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj); |
176 | |
177 | qcrypto_tls_creds_anon_unload(creds); |
178 | } |
179 | |
180 | |
181 | static void |
182 | qcrypto_tls_creds_anon_class_init(ObjectClass *oc, void *data) |
183 | { |
184 | UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); |
185 | |
186 | ucc->complete = qcrypto_tls_creds_anon_complete; |
187 | |
188 | object_class_property_add_bool(oc, "loaded" , |
189 | qcrypto_tls_creds_anon_prop_get_loaded, |
190 | qcrypto_tls_creds_anon_prop_set_loaded, |
191 | NULL); |
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); |
217 | |