src/libcharon/plugins/medcli/medcli_config.c

   1 /*
   2  * Copyright (C) 2008 Martin Willi
   3  * HSR Hochschule fuer Technik Rapperswil
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #define _GNU_SOURCE
  17 #include <string.h>
  18
  19 #include "medcli_config.h"
  20
  21 #include <daemon.h>
  22 #include <processing/jobs/callback_job.h>
  23
  24 typedef struct private_medcli_config_t private_medcli_config_t;
  25
  26 /**
  27  * Name of the mediation connection
  28  */
  29 #define MEDIATION_CONN_NAME "medcli-mediation"
  30
  31 /**
  32  * Private data of an medcli_config_t object
  33  */
  34 struct private_medcli_config_t {
  35
  36         /**
  37          * Public part
  38          */
  39         medcli_config_t public;
  40
  41         /**
  42          * database connection
  43          */
  44         database_t *db;
  45
  46         /**
  47          * rekey time
  48          */
  49         int rekey;
  50
  51         /**
  52          * dpd delay
  53          */
  54         int dpd;
  55
  56         /**
  57          * default ike config
  58          */
  59         ike_cfg_t *ike;
  60 };
  61
  62 /**
  63  * create a traffic selector from a CIDR notation string
  64  */
  65 static traffic_selector_t *ts_from_string(char *str)
  66 {
  67         if (str)
  68         {
  69                 traffic_selector_t *ts;
  70
  71                 ts = traffic_selector_create_from_cidr(str, 0, 0, 65535);
  72                 if (ts)
  73                 {
  74                         return ts;
  75                 }
  76         }
  77         return traffic_selector_create_dynamic(0, 0, 65535);
  78 }
  79
  80 /**
  81  * Build a mediation config
  82  */
  83 static peer_cfg_t *build_mediation_config(private_medcli_config_t *this,
  84                                                                                   peer_cfg_create_t *defaults)
  85 {
  86         enumerator_t *e;
  87         auth_cfg_t *auth;
  88         ike_cfg_t *ike_cfg;
  89         peer_cfg_t *med_cfg;
  90         ike_cfg_create_t ike = {
  91                 .version = IKEV2,
  92                 .local = "0.0.0.0",
  93                 .local_port = charon->socket->get_port(charon->socket, FALSE),
  94                 .remote_port = IKEV2_UDP_PORT,
  95                 .no_certreq = TRUE,
  96         };
  97         peer_cfg_create_t peer = *defaults;
  98         chunk_t me, other;
  99
 100         /* query mediation server config:
 101          * - build ike_cfg/peer_cfg for mediation connection on-the-fly
 102          */
 103         e = this->db->query(this->db,
 104                         "SELECT Address, ClientConfig.KeyId, MediationServerConfig.KeyId "
 105                         "FROM MediationServerConfig JOIN ClientConfig",
 106                         DB_TEXT, DB_BLOB, DB_BLOB);
 107         if (!e || !e->enumerate(e, &ike.remote, &me, &other))
 108         {
 109                 DESTROY_IF(e);
 110                 return NULL;
 111         }
 112         ike_cfg = ike_cfg_create(&ike);
 113         ike_cfg->add_proposal(ike_cfg, proposal_create_default(PROTO_IKE));
 114         ike_cfg->add_proposal(ike_cfg, proposal_create_default_aead(PROTO_IKE));
 115
 116         peer.mediation = TRUE;
 117         med_cfg = peer_cfg_create(MEDIATION_CONN_NAME, ike_cfg, &peer);
 118         e->destroy(e);
 119
 120         auth = auth_cfg_create();
 121         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 122         auth->add(auth, AUTH_RULE_IDENTITY,
 123                           identification_create_from_encoding(ID_KEY_ID, me));
 124         med_cfg->add_auth_cfg(med_cfg, auth, TRUE);
 125         auth = auth_cfg_create();
 126         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 127         auth->add(auth, AUTH_RULE_IDENTITY,
 128                           identification_create_from_encoding(ID_KEY_ID, other));
 129         med_cfg->add_auth_cfg(med_cfg, auth, FALSE);
 130         return med_cfg;
 131 }
 132
 133 METHOD(backend_t, get_peer_cfg_by_name, peer_cfg_t*,
 134         private_medcli_config_t *this, char *name)
 135 {
 136         enumerator_t *e;
 137         auth_cfg_t *auth;
 138         peer_cfg_t *peer_cfg;
 139         child_cfg_t *child_cfg;
 140         chunk_t me, other;
 141         char *local_net, *remote_net;
 142         peer_cfg_create_t peer = {
 143                 .cert_policy = CERT_NEVER_SEND,
 144                 .unique = UNIQUE_REPLACE,
 145                 .keyingtries = 1,
 146                 .rekey_time = this->rekey * 60,
 147                 .jitter_time = this->rekey * 5,
 148                 .over_time = this->rekey * 3,
 149                 .dpd = this->dpd,
 150         };
 151         child_cfg_create_t child = {
 152                 .lifetime = {
 153                         .time = {
 154                                 .life = this->rekey * 60 + this->rekey,
 155                                 .rekey = this->rekey,
 156                                 .jitter = this->rekey
 157                         },
 158                 },
 159                 .mode = MODE_TUNNEL,
 160         };
 161
 162         if (streq(name, "medcli-mediation"))
 163         {
 164                 return build_mediation_config(this, &peer);
 165         }
 166
 167         /* query mediated config:
 168          * - use any-any ike_cfg
 169          * - build peer_cfg on-the-fly using med_cfg
 170          * - add a child_cfg
 171          */
 172         e = this->db->query(this->db,
 173                         "SELECT ClientConfig.KeyId, Connection.KeyId, "
 174                         "Connection.LocalSubnet, Connection.RemoteSubnet "
 175                         "FROM ClientConfig JOIN Connection "
 176                         "WHERE Active AND Alias = ?", DB_TEXT, name,
 177                         DB_BLOB, DB_BLOB, DB_TEXT, DB_TEXT);
 178         if (!e || !e->enumerate(e, &me, &other, &local_net, &remote_net))
 179         {
 180                 DESTROY_IF(e);
 181                 return NULL;
 182         }
 183         peer.mediated_by = MEDIATION_CONN_NAME;
 184         peer.peer_id = identification_create_from_encoding(ID_KEY_ID, other);
 185         peer_cfg = peer_cfg_create(name, this->ike->get_ref(this->ike), &peer);
 186
 187         auth = auth_cfg_create();
 188         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 189         auth->add(auth, AUTH_RULE_IDENTITY,
 190                           identification_create_from_encoding(ID_KEY_ID, me));
 191         peer_cfg->add_auth_cfg(peer_cfg, auth, TRUE);
 192         auth = auth_cfg_create();
 193         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 194         auth->add(auth, AUTH_RULE_IDENTITY,
 195                           identification_create_from_encoding(ID_KEY_ID, other));
 196         peer_cfg->add_auth_cfg(peer_cfg, auth, FALSE);
 197
 198         child_cfg = child_cfg_create(name, &child);
 199         child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
 200         child_cfg->add_proposal(child_cfg, proposal_create_default_aead(PROTO_ESP));
 201         child_cfg->add_traffic_selector(child_cfg, TRUE, ts_from_string(local_net));
 202         child_cfg->add_traffic_selector(child_cfg, FALSE, ts_from_string(remote_net));
 203         peer_cfg->add_child_cfg(peer_cfg, child_cfg);
 204         e->destroy(e);
 205         return peer_cfg;
 206 }
 207
 208 METHOD(backend_t, create_ike_cfg_enumerator, enumerator_t*,
 209         private_medcli_config_t *this, host_t *me, host_t *other)
 210 {
 211         return enumerator_create_single(this->ike, NULL);
 212 }
 213
 214 typedef struct {
 215         /** implements enumerator */
 216         enumerator_t public;
 217         /** inner SQL enumerator */
 218         enumerator_t *inner;
 219         /** currently enumerated peer config */
 220         peer_cfg_t *current;
 221         /** ike cfg to use in peer cfg */
 222         ike_cfg_t *ike;
 223         /** rekey time */
 224         int rekey;
 225         /** dpd time */
 226         int dpd;
 227 } peer_enumerator_t;
 228
 229 METHOD(enumerator_t, peer_enumerator_enumerate, bool,
 230         peer_enumerator_t *this, va_list args)
 231 {
 232         char *name, *local_net, *remote_net;
 233         chunk_t me, other;
 234         peer_cfg_t **cfg;
 235         child_cfg_t *child_cfg;
 236         auth_cfg_t *auth;
 237         peer_cfg_create_t peer = {
 238                 .cert_policy = CERT_NEVER_SEND,
 239                 .unique = UNIQUE_REPLACE,
 240                 .keyingtries = 1,
 241                 .rekey_time = this->rekey * 60,
 242                 .jitter_time = this->rekey * 5,
 243                 .over_time = this->rekey * 3,
 244                 .dpd = this->dpd,
 245         };
 246         child_cfg_create_t child = {
 247                 .lifetime = {
 248                         .time = {
 249                                 .life = this->rekey * 60 + this->rekey,
 250                                 .rekey = this->rekey,
 251                                 .jitter = this->rekey
 252                         },
 253                 },
 254                 .mode = MODE_TUNNEL,
 255         };
 256
 257         VA_ARGS_VGET(args, cfg);
 258
 259         DESTROY_IF(this->current);
 260         if (!this->inner->enumerate(this->inner, &name, &me, &other,
 261                                                                 &local_net, &remote_net))
 262         {
 263                 this->current = NULL;
 264                 return FALSE;
 265         }
 266         this->current = peer_cfg_create(name, this->ike->get_ref(this->ike), &peer);
 267
 268         auth = auth_cfg_create();
 269         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 270         auth->add(auth, AUTH_RULE_IDENTITY,
 271                           identification_create_from_encoding(ID_KEY_ID, me));
 272         this->current->add_auth_cfg(this->current, auth, TRUE);
 273         auth = auth_cfg_create();
 274         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 275         auth->add(auth, AUTH_RULE_IDENTITY,
 276                           identification_create_from_encoding(ID_KEY_ID, other));
 277         this->current->add_auth_cfg(this->current, auth, FALSE);
 278
 279         child_cfg = child_cfg_create(name, &child);
 280         child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
 281         child_cfg->add_proposal(child_cfg, proposal_create_default_aead(PROTO_ESP));
 282         child_cfg->add_traffic_selector(child_cfg, TRUE, ts_from_string(local_net));
 283         child_cfg->add_traffic_selector(child_cfg, FALSE, ts_from_string(remote_net));
 284         this->current->add_child_cfg(this->current, child_cfg);
 285         *cfg = this->current;
 286         return TRUE;
 287 }
 288
 289 METHOD(enumerator_t, peer_enumerator_destroy, void,
 290         peer_enumerator_t *this)
 291 {
 292         DESTROY_IF(this->current);
 293         this->inner->destroy(this->inner);
 294         free(this);
 295 }
 296
 297 METHOD(backend_t, create_peer_cfg_enumerator, enumerator_t*,
 298         private_medcli_config_t *this, identification_t *me,
 299         identification_t *other)
 300 {
 301         peer_enumerator_t *e;
 302
 303         INIT(e,
 304                 .public = {
 305                         .enumerate = enumerator_enumerate_default,
 306                         .venumerate = _peer_enumerator_enumerate,
 307                         .destroy = _peer_enumerator_destroy,
 308                 },
 309                 .ike = this->ike,
 310                 .rekey = this->rekey,
 311                 .dpd = this->dpd,
 312         );
 313
 314         /* filter on IDs: NULL or ANY or matching KEY_ID */
 315         e->inner = this->db->query(this->db,
 316                         "SELECT Alias, ClientConfig.KeyId, Connection.KeyId, "
 317                         "Connection.LocalSubnet, Connection.RemoteSubnet "
 318                         "FROM ClientConfig JOIN Connection "
 319                         "WHERE Active AND "
 320                         "(? OR ClientConfig.KeyId = ?) AND (? OR Connection.KeyId = ?)",
 321                         DB_INT, me == NULL || me->get_type(me) == ID_ANY,
 322                         DB_BLOB, me && me->get_type(me) == ID_KEY_ID ?
 323                                 me->get_encoding(me) : chunk_empty,
 324                         DB_INT, other == NULL || other->get_type(other) == ID_ANY,
 325                         DB_BLOB, other && other->get_type(other) == ID_KEY_ID ?
 326                                 other->get_encoding(other) : chunk_empty,
 327                         DB_TEXT, DB_BLOB, DB_BLOB, DB_TEXT, DB_TEXT);
 328         if (!e->inner)
 329         {
 330                 free(e);
 331                 return NULL;
 332         }
 333         return &e->public;
 334 }
 335
 336 /**
 337  * initiate a peer config
 338  */
 339 static job_requeue_t initiate_config(peer_cfg_t *peer_cfg)
 340 {
 341         enumerator_t *enumerator;
 342         child_cfg_t *child_cfg = NULL;;
 343
 344         enumerator = peer_cfg->create_child_cfg_enumerator(peer_cfg);
 345         enumerator->enumerate(enumerator, &child_cfg);
 346         if (child_cfg)
 347         {
 348                 child_cfg->get_ref(child_cfg);
 349                 peer_cfg->get_ref(peer_cfg);
 350                 enumerator->destroy(enumerator);
 351                 charon->controller->initiate(charon->controller,
 352                                                                          peer_cfg, child_cfg, NULL, NULL, 0, FALSE);
 353         }
 354         else
 355         {
 356                 enumerator->destroy(enumerator);
 357         }
 358         return JOB_REQUEUE_NONE;
 359 }
 360
 361 /**
 362  * schedule initiation of all "active" connections
 363  */
 364 static void schedule_autoinit(private_medcli_config_t *this)
 365 {
 366         enumerator_t *e;
 367         char *name;
 368
 369         e = this->db->query(this->db, "SELECT Alias FROM Connection WHERE Active",
 370                                                 DB_TEXT);
 371         if (e)
 372         {
 373                 while (e->enumerate(e, &name))
 374                 {
 375                         peer_cfg_t *peer_cfg;
 376
 377                         peer_cfg = get_peer_cfg_by_name(this, name);
 378                         if (peer_cfg)
 379                         {
 380                                 /* schedule asynchronous initiation job */
 381                                 lib->processor->queue_job(lib->processor,
 382                                                 (job_t*)callback_job_create(
 383                                                                         (callback_job_cb_t)initiate_config,
 384                                                                         peer_cfg, (void*)peer_cfg->destroy, NULL));
 385                         }
 386                 }
 387                 e->destroy(e);
 388         }
 389 }
 390
 391 METHOD(medcli_config_t, destroy, void,
 392         private_medcli_config_t *this)
 393 {
 394         this->ike->destroy(this->ike);
 395         free(this);
 396 }
 397
 398 /**
 399  * Described in header.
 400  */
 401 medcli_config_t *medcli_config_create(database_t *db)
 402 {
 403         private_medcli_config_t *this;
 404         ike_cfg_create_t ike = {
 405                 .version = IKEV2,
 406                 .local = "0.0.0.0",
 407                 .local_port = charon->socket->get_port(charon->socket, FALSE),
 408                 .remote = "0.0.0.0",
 409                 .remote_port = IKEV2_UDP_PORT,
 410                 .no_certreq = TRUE,
 411         };
 412
 413         INIT(this,
 414                 .public = {
 415                         .backend = {
 416                                 .create_peer_cfg_enumerator = _create_peer_cfg_enumerator,
 417                                 .create_ike_cfg_enumerator = _create_ike_cfg_enumerator,
 418                                 .get_peer_cfg_by_name = _get_peer_cfg_by_name,
 419                         },
 420                         .destroy = _destroy,
 421                 },
 422                 .db = db,
 423                 .rekey = lib->settings->get_time(lib->settings, "medcli.rekey", 1200),
 424                 .dpd = lib->settings->get_time(lib->settings, "medcli.dpd", 300),
 425                 .ike = ike_cfg_create(&ike),
 426         );
 427         this->ike->add_proposal(this->ike, proposal_create_default(PROTO_IKE));
 428         this->ike->add_proposal(this->ike, proposal_create_default_aead(PROTO_IKE));
 429
 430         schedule_autoinit(this);
 431
 432         return &this->public;
 433 }