1 | /* |
2 | * QEMU crypto TLS 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 "qapi/error.h" |
23 | #include "qemu/module.h" |
24 | #include "tlscredspriv.h" |
25 | #include "trace.h" |
26 | |
27 | #define DH_BITS 2048 |
28 | |
29 | #ifdef CONFIG_GNUTLS |
30 | int |
31 | qcrypto_tls_creds_get_dh_params_file(QCryptoTLSCreds *creds, |
32 | const char *filename, |
33 | gnutls_dh_params_t *dh_params, |
34 | Error **errp) |
35 | { |
36 | int ret; |
37 | |
38 | trace_qcrypto_tls_creds_load_dh(creds, filename ? filename : "<generated>" ); |
39 | |
40 | if (filename == NULL) { |
41 | ret = gnutls_dh_params_init(dh_params); |
42 | if (ret < 0) { |
43 | error_setg(errp, "Unable to initialize DH parameters: %s" , |
44 | gnutls_strerror(ret)); |
45 | return -1; |
46 | } |
47 | ret = gnutls_dh_params_generate2(*dh_params, DH_BITS); |
48 | if (ret < 0) { |
49 | gnutls_dh_params_deinit(*dh_params); |
50 | *dh_params = NULL; |
51 | error_setg(errp, "Unable to generate DH parameters: %s" , |
52 | gnutls_strerror(ret)); |
53 | return -1; |
54 | } |
55 | } else { |
56 | GError *gerr = NULL; |
57 | gchar *contents; |
58 | gsize len; |
59 | gnutls_datum_t data; |
60 | if (!g_file_get_contents(filename, |
61 | &contents, |
62 | &len, |
63 | &gerr)) { |
64 | |
65 | error_setg(errp, "%s" , gerr->message); |
66 | g_error_free(gerr); |
67 | return -1; |
68 | } |
69 | data.data = (unsigned char *)contents; |
70 | data.size = len; |
71 | ret = gnutls_dh_params_init(dh_params); |
72 | if (ret < 0) { |
73 | g_free(contents); |
74 | error_setg(errp, "Unable to initialize DH parameters: %s" , |
75 | gnutls_strerror(ret)); |
76 | return -1; |
77 | } |
78 | ret = gnutls_dh_params_import_pkcs3(*dh_params, |
79 | &data, |
80 | GNUTLS_X509_FMT_PEM); |
81 | g_free(contents); |
82 | if (ret < 0) { |
83 | gnutls_dh_params_deinit(*dh_params); |
84 | *dh_params = NULL; |
85 | error_setg(errp, "Unable to load DH parameters from %s: %s" , |
86 | filename, gnutls_strerror(ret)); |
87 | return -1; |
88 | } |
89 | } |
90 | |
91 | return 0; |
92 | } |
93 | |
94 | |
95 | int |
96 | qcrypto_tls_creds_get_path(QCryptoTLSCreds *creds, |
97 | const char *filename, |
98 | bool required, |
99 | char **cred, |
100 | Error **errp) |
101 | { |
102 | struct stat sb; |
103 | int ret = -1; |
104 | |
105 | if (!creds->dir) { |
106 | if (required) { |
107 | error_setg(errp, "Missing 'dir' property value" ); |
108 | return -1; |
109 | } else { |
110 | return 0; |
111 | } |
112 | } |
113 | |
114 | *cred = g_strdup_printf("%s/%s" , creds->dir, filename); |
115 | |
116 | if (stat(*cred, &sb) < 0) { |
117 | if (errno == ENOENT && !required) { |
118 | ret = 0; |
119 | } else { |
120 | error_setg_errno(errp, errno, |
121 | "Unable to access credentials %s" , |
122 | *cred); |
123 | } |
124 | g_free(*cred); |
125 | *cred = NULL; |
126 | goto cleanup; |
127 | } |
128 | |
129 | ret = 0; |
130 | cleanup: |
131 | trace_qcrypto_tls_creds_get_path(creds, filename, |
132 | *cred ? *cred : "<none>" ); |
133 | return ret; |
134 | } |
135 | |
136 | |
137 | #endif /* ! CONFIG_GNUTLS */ |
138 | |
139 | |
140 | static void |
141 | qcrypto_tls_creds_prop_set_verify(Object *obj, |
142 | bool value, |
143 | Error **errp G_GNUC_UNUSED) |
144 | { |
145 | QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(obj); |
146 | |
147 | creds->verifyPeer = value; |
148 | } |
149 | |
150 | |
151 | static bool |
152 | qcrypto_tls_creds_prop_get_verify(Object *obj, |
153 | Error **errp G_GNUC_UNUSED) |
154 | { |
155 | QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(obj); |
156 | |
157 | return creds->verifyPeer; |
158 | } |
159 | |
160 | |
161 | static void |
162 | qcrypto_tls_creds_prop_set_dir(Object *obj, |
163 | const char *value, |
164 | Error **errp G_GNUC_UNUSED) |
165 | { |
166 | QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(obj); |
167 | |
168 | creds->dir = g_strdup(value); |
169 | } |
170 | |
171 | |
172 | static char * |
173 | qcrypto_tls_creds_prop_get_dir(Object *obj, |
174 | Error **errp G_GNUC_UNUSED) |
175 | { |
176 | QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(obj); |
177 | |
178 | return g_strdup(creds->dir); |
179 | } |
180 | |
181 | |
182 | static void |
183 | qcrypto_tls_creds_prop_set_priority(Object *obj, |
184 | const char *value, |
185 | Error **errp G_GNUC_UNUSED) |
186 | { |
187 | QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(obj); |
188 | |
189 | creds->priority = g_strdup(value); |
190 | } |
191 | |
192 | |
193 | static char * |
194 | qcrypto_tls_creds_prop_get_priority(Object *obj, |
195 | Error **errp G_GNUC_UNUSED) |
196 | { |
197 | QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(obj); |
198 | |
199 | return g_strdup(creds->priority); |
200 | } |
201 | |
202 | |
203 | static void |
204 | qcrypto_tls_creds_prop_set_endpoint(Object *obj, |
205 | int value, |
206 | Error **errp G_GNUC_UNUSED) |
207 | { |
208 | QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(obj); |
209 | |
210 | creds->endpoint = value; |
211 | } |
212 | |
213 | |
214 | static int |
215 | qcrypto_tls_creds_prop_get_endpoint(Object *obj, |
216 | Error **errp G_GNUC_UNUSED) |
217 | { |
218 | QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(obj); |
219 | |
220 | return creds->endpoint; |
221 | } |
222 | |
223 | |
224 | static void |
225 | qcrypto_tls_creds_class_init(ObjectClass *oc, void *data) |
226 | { |
227 | object_class_property_add_bool(oc, "verify-peer" , |
228 | qcrypto_tls_creds_prop_get_verify, |
229 | qcrypto_tls_creds_prop_set_verify, |
230 | NULL); |
231 | object_class_property_add_str(oc, "dir" , |
232 | qcrypto_tls_creds_prop_get_dir, |
233 | qcrypto_tls_creds_prop_set_dir, |
234 | NULL); |
235 | object_class_property_add_enum(oc, "endpoint" , |
236 | "QCryptoTLSCredsEndpoint" , |
237 | &QCryptoTLSCredsEndpoint_lookup, |
238 | qcrypto_tls_creds_prop_get_endpoint, |
239 | qcrypto_tls_creds_prop_set_endpoint, |
240 | NULL); |
241 | object_class_property_add_str(oc, "priority" , |
242 | qcrypto_tls_creds_prop_get_priority, |
243 | qcrypto_tls_creds_prop_set_priority, |
244 | NULL); |
245 | } |
246 | |
247 | |
248 | static void |
249 | qcrypto_tls_creds_init(Object *obj) |
250 | { |
251 | QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(obj); |
252 | |
253 | creds->verifyPeer = true; |
254 | } |
255 | |
256 | |
257 | static void |
258 | qcrypto_tls_creds_finalize(Object *obj) |
259 | { |
260 | QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(obj); |
261 | |
262 | g_free(creds->dir); |
263 | g_free(creds->priority); |
264 | } |
265 | |
266 | |
267 | static const TypeInfo qcrypto_tls_creds_info = { |
268 | .parent = TYPE_OBJECT, |
269 | .name = TYPE_QCRYPTO_TLS_CREDS, |
270 | .instance_size = sizeof(QCryptoTLSCreds), |
271 | .instance_init = qcrypto_tls_creds_init, |
272 | .instance_finalize = qcrypto_tls_creds_finalize, |
273 | .class_init = qcrypto_tls_creds_class_init, |
274 | .class_size = sizeof(QCryptoTLSCredsClass), |
275 | .abstract = true, |
276 | }; |
277 | |
278 | |
279 | static void |
280 | qcrypto_tls_creds_register_types(void) |
281 | { |
282 | type_register_static(&qcrypto_tls_creds_info); |
283 | } |
284 | |
285 | |
286 | type_init(qcrypto_tls_creds_register_types); |
287 | |