userapps/opensource/ipsec-tools/src/racoon/remoteconf.c

   1 /* $Id: remoteconf.c,v 1.24 2004/12/01 10:59:41 vanhu Exp $ */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include "config.h"
  33
  34 #include <sys/types.h>
  35 #include <sys/param.h>
  36 #include <sys/socket.h>
  37 #include <sys/queue.h>
  38
  39 #include <netinet/in.h>
  40
  41 #ifndef HAVE_NETINET6_IPSEC
  42 #include <netinet/ipsec.h>
  43 #else
  44 #include <netinet6/ipsec.h>
  45 #endif
  46
  47 #include <stdlib.h>
  48 #include <stdio.h>
  49 #include <string.h>
  50 #include <errno.h>
  51
  52 #include "var.h"
  53 #include "misc.h"
  54 #include "vmbuf.h"
  55 #include "plog.h"
  56 #include "sockmisc.h"
  57 #include "genlist.h"
  58 #include "debug.h"
  59
  60 #include "isakmp_var.h"
  61 #include "isakmp.h"
  62 #include "ipsec_doi.h"
  63 #include "oakley.h"
  64 #include "remoteconf.h"
  65 #include "localconf.h"
  66 #include "grabmyaddr.h"
  67 #include "proposal.h"
  68 #include "vendorid.h"
  69 #include "gcmalloc.h"
  70 #include "strnames.h"
  71 #include "algorithm.h"
  72 #include "nattraversal.h"
  73 #include "genlist.h"
  74
  75 static TAILQ_HEAD(_rmtree, remoteconf) rmtree;
  76
  77 /*
  78  * Script hook names
  79  */
  80 char *script_names[SCRIPT_MAX + 1] = { "phase1_up", "phase1_down" };
  81
  82 /*%%%*/
  83 /*
  84  * search remote configuration.
  85  * don't use port number to search if its value is either IPSEC_PORT_ANY.
  86  * If matching anonymous entry, then new entry is copied from anonymous entry.
  87  * If no anonymous entry found, then return NULL.
  88  * OUT: NULL:   NG
  89  *      Other:  remote configuration entry.
  90  */
  91 struct remoteconf *
  92 getrmconf_strict(remote, allow_anon)
  93         struct sockaddr *remote;
  94         int allow_anon;
  95 {
  96         struct remoteconf *p;
  97         struct remoteconf *anon = NULL;
  98         int withport;
  99         char buf[NI_MAXHOST + NI_MAXSERV + 10];
 100         char addr[NI_MAXHOST], port[NI_MAXSERV];
 101
 102         withport = 0;
 103
 104         switch (remote->sa_family) {
 105         case AF_INET:
 106                 if (((struct sockaddr_in *)remote)->sin_port != IPSEC_PORT_ANY)
 107                         withport = 1;
 108                 break;
 109 #ifdef INET6
 110         case AF_INET6:
 111                 if (((struct sockaddr_in6 *)remote)->sin6_port != IPSEC_PORT_ANY)
 112                         withport = 1;
 113                 break;
 114 #endif
 115         case AF_UNSPEC:
 116                 break;
 117
 118         default:
 119                 plog(LLV_ERROR, LOCATION, NULL,
 120                         "invalid family: %d\n", remote->sa_family);
 121                 exit(1);
 122         }
 123
 124         if (remote->sa_family == AF_UNSPEC)
 125                 snprintf (buf, sizeof(buf), "%s", "anonymous");
 126         else {
 127                 GETNAMEINFO(remote, addr, port);
 128                 snprintf(buf, sizeof(buf), "%s%s%s%s", addr,
 129                         withport ? "[" : "",
 130                         withport ? port : "",
 131                         withport ? "]" : "");
 132         }
 133
 134         TAILQ_FOREACH(p, &rmtree, chain) {
 135                 if ((remote->sa_family == AF_UNSPEC
 136                      && remote->sa_family == p->remote->sa_family)
 137                  || (!withport && cmpsaddrwop(remote, p->remote) == 0)
 138                  || (withport && cmpsaddrstrict(remote, p->remote) == 0)) {
 139                         plog(LLV_DEBUG, LOCATION, NULL,
 140                                 "configuration found for %s.\n", buf);
 141                         return p;
 142                 }
 143
 144                 /* save the pointer to the anonymous configuration */
 145                 if (p->remote->sa_family == AF_UNSPEC)
 146                         anon = p;
 147         }
 148
 149         if (allow_anon && anon != NULL) {
 150                 plog(LLV_DEBUG, LOCATION, NULL,
 151                         "anonymous configuration selected for %s.\n", buf);
 152                 return anon;
 153         }
 154
 155         plog(LLV_DEBUG, LOCATION, NULL,
 156                 "no remote configuration found.\n");
 157
 158         return NULL;
 159 }
 160
 161 struct remoteconf *
 162 getrmconf(remote)
 163         struct sockaddr *remote;
 164 {
 165         return getrmconf_strict(remote, 1);
 166 }
 167
 168 struct remoteconf *
 169 newrmconf()
 170 {
 171         struct remoteconf *new;
 172
 173         new = racoon_calloc(1, sizeof(*new));
 174         if (new == NULL)
 175                 return NULL;
 176
 177         new->proposal = NULL;
 178
 179         /* set default */
 180         new->doitype = IPSEC_DOI;
 181         new->sittype = IPSECDOI_SIT_IDENTITY_ONLY;
 182         new->idvtype = IDTYPE_UNDEFINED;
 183         new->idvl_p = genlist_init();
 184         new->nonce_size = DEFAULT_NONCE_SIZE;
 185         new->passive = FALSE;
 186         new->ike_frag = FALSE;
 187         new->ini_contact = TRUE;
 188         new->mode_cfg = FALSE;
 189         new->pcheck_level = PROP_CHECK_STRICT;
 190         new->verify_identifier = FALSE;
 191         new->verify_cert = TRUE;
 192         new->getcert_method = ISAKMP_GETCERT_PAYLOAD;
 193         new->getcacert_method = ISAKMP_GETCERT_LOCALFILE;
 194         new->cacerttype = ISAKMP_CERT_X509SIGN;
 195         new->cacertfile = NULL;
 196         new->send_cert = TRUE;
 197         new->send_cr = TRUE;
 198         new->support_proxy = FALSE;
 199         bzero(&new->script[0], sizeof(char *) * (SCRIPT_MAX + 1));
 200         new->gen_policy = FALSE;
 201         new->retry_counter = lcconf->retry_counter;
 202         new->retry_interval = lcconf->retry_interval;
 203         new->nat_traversal = FALSE;
 204         new->rsa_private = genlist_init();
 205         new->rsa_public = genlist_init();
 206         new->idv = NULL;
 207         new->key = NULL;
 208
 209         new->dpd = TRUE; /* Enable DPD support by default */
 210         new->dpd_interval = 0; /* Disable DPD checks by default */
 211         new->dpd_retry = 5;
 212         new->dpd_maxfails = 5;
 213
 214         return new;
 215 }
 216
 217 struct remoteconf *
 218 copyrmconf(remote)
 219         struct sockaddr *remote;
 220 {
 221         struct remoteconf *new, *old;
 222
 223         old = getrmconf_strict (remote, 0);
 224         if (old == NULL) {
 225                 plog (LLV_ERROR, LOCATION, NULL,
 226                       "Remote configuration for '%s' not found!\n",
 227                       saddr2str (remote));
 228                 return NULL;
 229         }
 230
 231         new = duprmconf (old);
 232
 233         return new;
 234 }
 235
 236 void *
 237 dupidvl(entry, arg)
 238         void *entry;
 239         void *arg;
 240 {
 241         struct idspec *id;
 242         struct idspec *old = (struct idspec *) entry;
 243         id = newidspec();
 244         if (!id) return (void *) -1;
 245
 246         if (set_identifier(&id->id, old->idtype, old->id) != 0)
 247                 return (void *) -1;
 248
 249         id->idtype = old->idtype;
 250
 251         genlist_append(arg, id);
 252         return NULL;
 253 }
 254
 255 struct remoteconf *
 256 duprmconf (rmconf)
 257         struct remoteconf *rmconf;
 258 {
 259         struct remoteconf *new;
 260
 261         new = racoon_calloc(1, sizeof(*new));
 262         if (new == NULL)
 263                 return NULL;
 264         memcpy (new, rmconf, sizeof (*new));
 265         // FIXME: We should duplicate the proposal as well.
 266         // This is now handled in the cfparse.y
 267         // new->proposal = ...;
 268
 269         /* duplicate dynamic structures */
 270         if (new->etypes)
 271                 new->etypes=dupetypes(new->etypes);
 272         new->idvl_p = genlist_init();
 273         genlist_foreach(rmconf->idvl_p, dupidvl, new->idvl_p);
 274
 275         return new;
 276 }
 277
 278 static void
 279 idspec_free(void *data)
 280 {
 281         vfree (((struct idspec *)data)->id);
 282         free (data);
 283 }
 284
 285 void
 286 delrmconf(rmconf)
 287         struct remoteconf *rmconf;
 288 {
 289         if (rmconf->etypes)
 290                 deletypes(rmconf->etypes);
 291         if (rmconf->idvl_p)
 292                 genlist_free(rmconf->idvl_p, idspec_free);
 293         if (rmconf->dhgrp)
 294                 oakley_dhgrp_free(rmconf->dhgrp);
 295         if (rmconf->proposal)
 296                 delisakmpsa(rmconf->proposal);
 297         racoon_free(rmconf);
 298 }
 299
 300 void
 301 delisakmpsa(sa)
 302         struct isakmpsa *sa;
 303 {
 304         if (sa->dhgrp)
 305                 oakley_dhgrp_free(sa->dhgrp);
 306         if (sa->next)
 307                 delisakmpsa(sa->next);
 308 #ifdef HAVE_GSSAPI
 309         if (sa->gssid)
 310                 vfree(sa->gssid);
 311 #endif
 312         racoon_free(sa);
 313 }
 314
 315 struct etypes *
 316 dupetypes(orig)
 317         struct etypes *orig;
 318 {
 319         struct etypes *new;
 320
 321         if (!orig)
 322                 return NULL;
 323
 324         new = racoon_malloc(sizeof(struct etypes));
 325         if (new == NULL)
 326                 return NULL;
 327
 328         new->type = orig->type;
 329         new->next = NULL;
 330
 331         if (orig->next)
 332                 new->next=dupetypes(orig->next);
 333
 334         return new;
 335 }
 336
 337 void
 338 deletypes(e)
 339         struct etypes *e;
 340 {
 341         if (e->next)
 342                 deletypes(e->next);
 343         racoon_free(e);
 344 }
 345
 346 /*
 347  * insert into head of list.
 348  */
 349 void
 350 insrmconf(new)
 351         struct remoteconf *new;
 352 {
 353         TAILQ_INSERT_HEAD(&rmtree, new, chain);
 354 }
 355
 356 void
 357 remrmconf(rmconf)
 358         struct remoteconf *rmconf;
 359 {
 360         TAILQ_REMOVE(&rmtree, rmconf, chain);
 361 }
 362
 363 void
 364 flushrmconf()
 365 {
 366         struct remoteconf *p, *next;
 367
 368         for (p = TAILQ_FIRST(&rmtree); p; p = next) {
 369                 next = TAILQ_NEXT(p, chain);
 370                 remrmconf(p);
 371                 delrmconf(p);
 372         }
 373 }
 374
 375 void
 376 initrmconf()
 377 {
 378         TAILQ_INIT(&rmtree);
 379 }
 380
 381 /* check exchange type to be acceptable */
 382 struct etypes *
 383 check_etypeok(rmconf, etype)
 384         struct remoteconf *rmconf;
 385         u_int8_t etype;
 386 {
 387         struct etypes *e;
 388
 389         for (e = rmconf->etypes; e != NULL; e = e->next) {
 390                 if (e->type == etype)
 391                         break;
 392         }
 393
 394         return e;
 395 }
 396
 397 /*%%%*/
 398 struct isakmpsa *
 399 newisakmpsa()
 400 {
 401         struct isakmpsa *new;
 402
 403         new = racoon_calloc(1, sizeof(*new));
 404         if (new == NULL)
 405                 return NULL;
 406
 407         /*
 408          * Just for sanity, make sure this is initialized.  This is
 409          * filled in for real when the ISAKMP proposal is configured.
 410          */
 411         new->vendorid = VENDORID_UNKNOWN;
 412
 413         new->next = NULL;
 414         new->rmconf = NULL;
 415 #ifdef HAVE_GSSAPI
 416         new->gssid = NULL;
 417 #endif
 418
 419         return new;
 420 }
 421
 422 /*
 423  * insert into tail of list.
 424  */
 425 void
 426 insisakmpsa(new, rmconf)
 427         struct isakmpsa *new;
 428         struct remoteconf *rmconf;
 429 {
 430         struct isakmpsa *p;
 431
 432         new->rmconf = rmconf;
 433
 434         if (rmconf->proposal == NULL) {
 435                 rmconf->proposal = new;
 436                 return;
 437         }
 438
 439         for (p = rmconf->proposal; p->next != NULL; p = p->next)
 440                 ;
 441         p->next = new;
 442
 443         return;
 444 }
 445
 446 struct remoteconf *
 447 foreachrmconf(rmconf_func_t rmconf_func, void *data)
 448 {
 449         struct remoteconf *p, *ret = NULL;
 450
 451         TAILQ_FOREACH_REVERSE(p, &rmtree, _rmtree, chain) {
 452                 ret = (*rmconf_func)(p, data);
 453                 if (ret)
 454                         break;
 455         }
 456
 457         return ret;
 458 }
 459
 460 static void *
 461 dump_peers_identifiers (void *entry, void *arg)
 462 {
 463         struct idspec *id = (struct idspec*) entry;
 464         char buf[1024], *pbuf;
 465         pbuf = buf;
 466         pbuf += sprintf (pbuf, "\tpeers_identifier %s",
 467                          s_idtype (id->idtype));
 468         if (id->id)
 469                 pbuf += sprintf (pbuf, " \"%s\"", id->id->v);
 470         plog(LLV_INFO, LOCATION, NULL, "%s;\n", buf);
 471         return NULL;
 472 }
 473
 474 static struct remoteconf *
 475 dump_rmconf_single (struct remoteconf *p, void *data)
 476 {
 477         struct etypes *etype = p->etypes;
 478         struct isakmpsa *prop = p->proposal;
 479         char buf[1024], *pbuf;
 480
 481         pbuf = buf;
 482         pbuf += sprintf(pbuf, "remote %s", saddr2str(p->remote));
 483         if (p->inherited_from)
 484                 pbuf += sprintf(pbuf, " inherit %s",
 485                                 saddr2str(p->inherited_from->remote));
 486         plog(LLV_INFO, LOCATION, NULL, "%s {\n", buf);
 487         pbuf = buf;
 488         pbuf += sprintf(pbuf, "\texchange_type ");
 489         while (etype) {
 490                 pbuf += sprintf (pbuf, "%s%s", s_etype(etype->type),
 491                                  etype->next != NULL ? ", " : ";\n");
 492                 etype = etype->next;
 493         }
 494         plog(LLV_INFO, LOCATION, NULL, "%s", buf);
 495         plog(LLV_INFO, LOCATION, NULL, "\tdoi %s;\n", s_doi(p->doitype));
 496         pbuf = buf;
 497         pbuf += sprintf(pbuf, "\tmy_identifier %s", s_idtype (p->idvtype));
 498         if (p->idvtype == IDTYPE_ASN1DN) {
 499                 plog(LLV_INFO, LOCATION, NULL, "%s;\n", buf);
 500                 plog(LLV_INFO, LOCATION, NULL, "\tcertificate_type %s \"%s\" \"%s\";\n",
 501                         p->certtype == ISAKMP_CERT_X509SIGN ? "x509" : "*UNKNOWN*",
 502                         p->mycertfile, p->myprivfile);
 503                 switch (p->getcert_method) {
 504                   case 0:
 505                         break;
 506                   case ISAKMP_GETCERT_PAYLOAD:
 507                         plog(LLV_INFO, LOCATION, NULL, "\t/* peers certificate from payload */\n");
 508                         break;
 509                   case ISAKMP_GETCERT_LOCALFILE:
 510                         plog(LLV_INFO, LOCATION, NULL, "\tpeers_certfile \"%s\";\n", p->peerscertfile);
 511                         break;
 512                   case ISAKMP_GETCERT_DNS:
 513                         plog(LLV_INFO, LOCATION, NULL, "\tpeer_certfile dnssec;\n");
 514                         break;
 515                   default:
 516                         plog(LLV_INFO, LOCATION, NULL, "\tpeers_certfile *UNKNOWN* (%d)\n", p->getcert_method);
 517                 }
 518         }
 519         else {
 520                 if (p->idv)
 521                         pbuf += sprintf (pbuf, " \"%s\"", p->idv->v);
 522                 plog(LLV_INFO, LOCATION, NULL, "%s;\n", buf);
 523                 genlist_foreach(p->idvl_p, &dump_peers_identifiers, NULL);
 524         }
 525
 526         plog(LLV_INFO, LOCATION, NULL, "\tsend_cert %s;\n",
 527                 s_switch (p->send_cert));
 528         plog(LLV_INFO, LOCATION, NULL, "\tsend_cr %s;\n",
 529                 s_switch (p->send_cr));
 530         plog(LLV_INFO, LOCATION, NULL, "\tverify_cert %s;\n",
 531                 s_switch (p->verify_cert));
 532         plog(LLV_INFO, LOCATION, NULL, "\tverify_identifier %s;\n",
 533                 s_switch (p->verify_identifier));
 534         plog(LLV_INFO, LOCATION, NULL, "\tnat_traversal %s;\n",
 535                 p->nat_traversal == NATT_FORCE ?
 536                         "force" : s_switch (p->nat_traversal));
 537         plog(LLV_INFO, LOCATION, NULL, "\tnonce_size %d;\n",
 538                 p->nonce_size);
 539         plog(LLV_INFO, LOCATION, NULL, "\tpassive %s;\n",
 540                 s_switch (p->passive));
 541         plog(LLV_INFO, LOCATION, NULL, "\tike_frag %s;\n",
 542                 s_switch (p->ike_frag));
 543         plog(LLV_INFO, LOCATION, NULL, "\tinitial_contact %s;\n",
 544                 s_switch (p->ini_contact));
 545         plog(LLV_INFO, LOCATION, NULL, "\tgenerate_policy %s;\n",
 546                 s_switch (p->gen_policy));
 547         plog(LLV_INFO, LOCATION, NULL, "\tsupport_proxy %s;\n",
 548                 s_switch (p->support_proxy));
 549
 550         while (prop) {
 551                 plog(LLV_INFO, LOCATION, NULL, "\n");
 552                 plog(LLV_INFO, LOCATION, NULL,
 553                         "\t/* prop_no=%d, trns_no=%d, rmconf=%s */\n",
 554                         prop->prop_no, prop->trns_no,
 555                         saddr2str(prop->rmconf->remote));
 556                 plog(LLV_INFO, LOCATION, NULL, "\tproposal {\n");
 557                 plog(LLV_INFO, LOCATION, NULL, "\t\tlifetime time %lu sec;\n",
 558                         (long)prop->lifetime);
 559                 plog(LLV_INFO, LOCATION, NULL, "\t\tlifetime bytes %zd;\n",
 560                         prop->lifebyte);
 561                 plog(LLV_INFO, LOCATION, NULL, "\t\tdh_group %s;\n",
 562                         alg_oakley_dhdef_name(prop->dh_group));
 563                 plog(LLV_INFO, LOCATION, NULL, "\t\tencryption_algorithm %s;\n",
 564                         alg_oakley_encdef_name(prop->enctype));
 565                 plog(LLV_INFO, LOCATION, NULL, "\t\thash_algorithm %s;\n",
 566                         alg_oakley_hashdef_name(prop->hashtype));
 567                 plog(LLV_INFO, LOCATION, NULL, "\t\tauthentication_method %s;\n",
 568                         alg_oakley_authdef_name(prop->authmethod));
 569                 plog(LLV_INFO, LOCATION, NULL, "\t}\n");
 570                 prop = prop->next;
 571         }
 572         plog(LLV_INFO, LOCATION, NULL, "}\n");
 573         plog(LLV_INFO, LOCATION, NULL, "\n");
 574
 575         return NULL;
 576 }
 577
 578 void
 579 dumprmconf()
 580 {
 581         foreachrmconf (dump_rmconf_single, NULL);
 582 }
 583
 584 struct idspec *
 585 newidspec()
 586 {
 587         struct idspec *new;
 588
 589         new = racoon_calloc(1, sizeof(*new));
 590         if (new == NULL)
 591                 return NULL;
 592         new->idtype = IDTYPE_ADDRESS;
 593
 594         return new;
 595 }
 596