Daniel P. Berrange | e00adf6 | 2015-03-13 17:39:26 +0000 | [diff] [blame] | 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 "crypto/tlscredsanon.h" |
| 22 | #include "crypto/tlscredspriv.h" |
| 23 | #include "qom/object_interfaces.h" |
| 24 | #include "trace.h" |
| 25 | |
| 26 | |
| 27 | #ifdef CONFIG_GNUTLS |
| 28 | |
| 29 | |
| 30 | static int |
| 31 | qcrypto_tls_creds_anon_load(QCryptoTLSCredsAnon *creds, |
| 32 | Error **errp) |
| 33 | { |
| 34 | char *dhparams = NULL; |
| 35 | int ret; |
| 36 | int rv = -1; |
| 37 | |
| 38 | trace_qcrypto_tls_creds_anon_load(creds, |
| 39 | creds->parent_obj.dir ? creds->parent_obj.dir : "<nodir>"); |
| 40 | |
| 41 | if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { |
| 42 | if (qcrypto_tls_creds_get_path(&creds->parent_obj, |
| 43 | QCRYPTO_TLS_CREDS_DH_PARAMS, |
| 44 | false, &dhparams, errp) < 0) { |
| 45 | goto cleanup; |
| 46 | } |
| 47 | |
| 48 | ret = gnutls_anon_allocate_server_credentials(&creds->data.server); |
| 49 | if (ret < 0) { |
| 50 | error_setg(errp, "Cannot allocate credentials: %s", |
| 51 | gnutls_strerror(ret)); |
| 52 | goto cleanup; |
| 53 | } |
| 54 | |
| 55 | if (qcrypto_tls_creds_get_dh_params_file(&creds->parent_obj, dhparams, |
| 56 | &creds->parent_obj.dh_params, |
| 57 | errp) < 0) { |
| 58 | goto cleanup; |
| 59 | } |
| 60 | |
| 61 | gnutls_anon_set_server_dh_params(creds->data.server, |
| 62 | creds->parent_obj.dh_params); |
| 63 | } else { |
| 64 | ret = gnutls_anon_allocate_client_credentials(&creds->data.client); |
| 65 | if (ret < 0) { |
| 66 | error_setg(errp, "Cannot allocate credentials: %s", |
| 67 | gnutls_strerror(ret)); |
| 68 | goto cleanup; |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | rv = 0; |
| 73 | cleanup: |
| 74 | g_free(dhparams); |
| 75 | return rv; |
| 76 | } |
| 77 | |
| 78 | |
| 79 | static void |
| 80 | qcrypto_tls_creds_anon_unload(QCryptoTLSCredsAnon *creds) |
| 81 | { |
| 82 | if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { |
| 83 | if (creds->data.client) { |
| 84 | gnutls_anon_free_client_credentials(creds->data.client); |
| 85 | creds->data.client = NULL; |
| 86 | } |
| 87 | } else { |
| 88 | if (creds->data.server) { |
| 89 | gnutls_anon_free_server_credentials(creds->data.server); |
| 90 | creds->data.server = NULL; |
| 91 | } |
| 92 | } |
| 93 | if (creds->parent_obj.dh_params) { |
| 94 | gnutls_dh_params_deinit(creds->parent_obj.dh_params); |
| 95 | creds->parent_obj.dh_params = NULL; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | #else /* ! CONFIG_GNUTLS */ |
| 100 | |
| 101 | |
| 102 | static void |
| 103 | qcrypto_tls_creds_anon_load(QCryptoTLSCredsAnon *creds G_GNUC_UNUSED, |
| 104 | Error **errp) |
| 105 | { |
| 106 | error_setg(errp, "TLS credentials support requires GNUTLS"); |
| 107 | } |
| 108 | |
| 109 | |
| 110 | static void |
| 111 | qcrypto_tls_creds_anon_unload(QCryptoTLSCredsAnon *creds G_GNUC_UNUSED) |
| 112 | { |
| 113 | /* nada */ |
| 114 | } |
| 115 | |
| 116 | |
| 117 | #endif /* ! CONFIG_GNUTLS */ |
| 118 | |
| 119 | |
| 120 | static void |
| 121 | qcrypto_tls_creds_anon_prop_set_loaded(Object *obj, |
| 122 | bool value, |
| 123 | Error **errp) |
| 124 | { |
| 125 | QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj); |
| 126 | |
| 127 | if (value) { |
| 128 | qcrypto_tls_creds_anon_load(creds, errp); |
| 129 | } else { |
| 130 | qcrypto_tls_creds_anon_unload(creds); |
| 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), true, "loaded", errp); |
| 170 | } |
| 171 | |
| 172 | |
| 173 | static void |
| 174 | qcrypto_tls_creds_anon_init(Object *obj) |
| 175 | { |
| 176 | object_property_add_bool(obj, "loaded", |
| 177 | qcrypto_tls_creds_anon_prop_get_loaded, |
| 178 | qcrypto_tls_creds_anon_prop_set_loaded, |
| 179 | NULL); |
| 180 | } |
| 181 | |
| 182 | |
| 183 | static void |
| 184 | qcrypto_tls_creds_anon_finalize(Object *obj) |
| 185 | { |
| 186 | QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj); |
| 187 | |
| 188 | qcrypto_tls_creds_anon_unload(creds); |
| 189 | } |
| 190 | |
| 191 | |
| 192 | static void |
| 193 | qcrypto_tls_creds_anon_class_init(ObjectClass *oc, void *data) |
| 194 | { |
| 195 | UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); |
| 196 | |
| 197 | ucc->complete = qcrypto_tls_creds_anon_complete; |
| 198 | } |
| 199 | |
| 200 | |
| 201 | static const TypeInfo qcrypto_tls_creds_anon_info = { |
| 202 | .parent = TYPE_QCRYPTO_TLS_CREDS, |
| 203 | .name = TYPE_QCRYPTO_TLS_CREDS_ANON, |
| 204 | .instance_size = sizeof(QCryptoTLSCredsAnon), |
| 205 | .instance_init = qcrypto_tls_creds_anon_init, |
| 206 | .instance_finalize = qcrypto_tls_creds_anon_finalize, |
| 207 | .class_size = sizeof(QCryptoTLSCredsAnonClass), |
| 208 | .class_init = qcrypto_tls_creds_anon_class_init, |
| 209 | .interfaces = (InterfaceInfo[]) { |
| 210 | { TYPE_USER_CREATABLE }, |
| 211 | { } |
| 212 | } |
| 213 | }; |
| 214 | |
| 215 | |
| 216 | static void |
| 217 | qcrypto_tls_creds_anon_register_types(void) |
| 218 | { |
| 219 | type_register_static(&qcrypto_tls_creds_anon_info); |
| 220 | } |
| 221 | |
| 222 | |
| 223 | type_init(qcrypto_tls_creds_anon_register_types); |