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e00adf6c DB |
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 | |
b7cbb874 | 9 | * version 2.1 of the License, or (at your option) any later version. |
e00adf6c DB |
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 | ||
42f7a448 | 21 | #include "qemu/osdep.h" |
e00adf6c | 22 | #include "crypto/tlscredsanon.h" |
986bc8de | 23 | #include "tlscredspriv.h" |
da34e65c | 24 | #include "qapi/error.h" |
0b8fa32f | 25 | #include "qemu/module.h" |
e00adf6c DB |
26 | #include "qom/object_interfaces.h" |
27 | #include "trace.h" | |
28 | ||
29 | ||
30 | #ifdef CONFIG_GNUTLS | |
31 | ||
678bcc3c PMD |
32 | #include <gnutls/gnutls.h> |
33 | ||
e00adf6c DB |
34 | |
35 | static int | |
36 | qcrypto_tls_creds_anon_load(QCryptoTLSCredsAnon *creds, | |
37 | Error **errp) | |
38 | { | |
57b9f113 | 39 | g_autofree char *dhparams = NULL; |
e00adf6c | 40 | int ret; |
e00adf6c DB |
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) { | |
57b9f113 | 49 | return -1; |
e00adf6c DB |
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)); | |
57b9f113 | 56 | return -1; |
e00adf6c DB |
57 | } |
58 | ||
59 | if (qcrypto_tls_creds_get_dh_params_file(&creds->parent_obj, dhparams, | |
60 | &creds->parent_obj.dh_params, | |
61 | errp) < 0) { | |
57b9f113 | 62 | return -1; |
e00adf6c DB |
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)); | |
57b9f113 | 72 | return -1; |
e00adf6c DB |
73 | } |
74 | } | |
75 | ||
57b9f113 | 76 | return 0; |
e00adf6c DB |
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 | |
0310641c | 122 | qcrypto_tls_creds_anon_complete(UserCreatable *uc, Error **errp) |
e00adf6c | 123 | { |
0310641c | 124 | QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(uc); |
e00adf6c | 125 | |
0310641c | 126 | qcrypto_tls_creds_anon_load(creds, errp); |
e00adf6c DB |
127 | } |
128 | ||
129 | ||
130 | #ifdef CONFIG_GNUTLS | |
131 | ||
132 | ||
133 | static bool | |
134 | qcrypto_tls_creds_anon_prop_get_loaded(Object *obj, | |
135 | Error **errp G_GNUC_UNUSED) | |
136 | { | |
137 | QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj); | |
138 | ||
139 | if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { | |
140 | return creds->data.server != NULL; | |
141 | } else { | |
142 | return creds->data.client != NULL; | |
143 | } | |
144 | } | |
145 | ||
146 | ||
147 | #else /* ! CONFIG_GNUTLS */ | |
148 | ||
149 | ||
150 | static bool | |
151 | qcrypto_tls_creds_anon_prop_get_loaded(Object *obj G_GNUC_UNUSED, | |
152 | Error **errp G_GNUC_UNUSED) | |
153 | { | |
154 | return false; | |
155 | } | |
156 | ||
157 | ||
158 | #endif /* ! CONFIG_GNUTLS */ | |
159 | ||
160 | ||
e00adf6c DB |
161 | static void |
162 | qcrypto_tls_creds_anon_finalize(Object *obj) | |
163 | { | |
164 | QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj); | |
165 | ||
166 | qcrypto_tls_creds_anon_unload(creds); | |
167 | } | |
168 | ||
169 | ||
170 | static void | |
171 | qcrypto_tls_creds_anon_class_init(ObjectClass *oc, void *data) | |
172 | { | |
173 | UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); | |
174 | ||
175 | ucc->complete = qcrypto_tls_creds_anon_complete; | |
9884abee DB |
176 | |
177 | object_class_property_add_bool(oc, "loaded", | |
178 | qcrypto_tls_creds_anon_prop_get_loaded, | |
0310641c | 179 | NULL); |
e00adf6c DB |
180 | } |
181 | ||
182 | ||
183 | static const TypeInfo qcrypto_tls_creds_anon_info = { | |
184 | .parent = TYPE_QCRYPTO_TLS_CREDS, | |
185 | .name = TYPE_QCRYPTO_TLS_CREDS_ANON, | |
186 | .instance_size = sizeof(QCryptoTLSCredsAnon), | |
e00adf6c DB |
187 | .instance_finalize = qcrypto_tls_creds_anon_finalize, |
188 | .class_size = sizeof(QCryptoTLSCredsAnonClass), | |
189 | .class_init = qcrypto_tls_creds_anon_class_init, | |
190 | .interfaces = (InterfaceInfo[]) { | |
191 | { TYPE_USER_CREATABLE }, | |
192 | { } | |
193 | } | |
194 | }; | |
195 | ||
196 | ||
197 | static void | |
198 | qcrypto_tls_creds_anon_register_types(void) | |
199 | { | |
200 | type_register_static(&qcrypto_tls_creds_anon_info); | |
201 | } | |
202 | ||
203 | ||
204 | type_init(qcrypto_tls_creds_anon_register_types); |