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Sourcecode: ipsec-tools version File versions

remoteconf.c

/* $Id: remoteconf.c,v 1.24 2004/12/01 10:59:41 vanhu Exp $ */

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/queue.h>

#include <netinet/in.h>

#ifndef HAVE_NETINET6_IPSEC
#include <netinet/ipsec.h>
#else
#include <netinet6/ipsec.h>
#endif

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>

#include "var.h"
#include "misc.h"
#include "vmbuf.h"
#include "plog.h"
#include "sockmisc.h"
#include "genlist.h"
#include "debug.h"

#include "isakmp_var.h"
#include "isakmp.h"
#include "ipsec_doi.h"
#include "oakley.h"
#include "remoteconf.h"
#include "localconf.h"
#include "grabmyaddr.h"
#include "proposal.h"
#include "vendorid.h"
#include "gcmalloc.h"
#include "strnames.h"
#include "algorithm.h"
#include "nattraversal.h"
#include "genlist.h"

static TAILQ_HEAD(_rmtree, remoteconf) rmtree;

/* 
 * Script hook names
 */
char *script_names[SCRIPT_MAX + 1] = { "phase1_up", "phase1_down" };

/*%%%*/
/*
 * search remote configuration.
 * don't use port number to search if its value is either IPSEC_PORT_ANY.
 * If matching anonymous entry, then new entry is copied from anonymous entry.
 * If no anonymous entry found, then return NULL.
 * OUT:     NULL: NG
 *    Other:      remote configuration entry.
 */
struct remoteconf *
getrmconf_strict(remote, allow_anon)
      struct sockaddr *remote;
      int allow_anon;
{
      struct remoteconf *p;
      struct remoteconf *anon = NULL;
      int withport;
      char buf[NI_MAXHOST + NI_MAXSERV + 10];
      char addr[NI_MAXHOST], port[NI_MAXSERV];

      withport = 0;

      switch (remote->sa_family) {
      case AF_INET:
            if (((struct sockaddr_in *)remote)->sin_port != IPSEC_PORT_ANY)
                  withport = 1;
            break;
#ifdef INET6
      case AF_INET6:
            if (((struct sockaddr_in6 *)remote)->sin6_port != IPSEC_PORT_ANY)
                  withport = 1;
            break;
#endif
      case AF_UNSPEC:
            break;

      default:
            plog(LLV_ERROR, LOCATION, NULL,
                  "invalid family: %d\n", remote->sa_family);
            exit(1);
      }

      if (remote->sa_family == AF_UNSPEC)
            snprintf (buf, sizeof(buf), "%s", "anonymous");
      else {
            GETNAMEINFO(remote, addr, port);
            snprintf(buf, sizeof(buf), "%s%s%s%s", addr,
                  withport ? "[" : "",
                  withport ? port : "",
                  withport ? "]" : "");
      }

      TAILQ_FOREACH(p, &rmtree, chain) {
            if ((remote->sa_family == AF_UNSPEC
                 && remote->sa_family == p->remote->sa_family)
             || (!withport && cmpsaddrwop(remote, p->remote) == 0)
             || (withport && cmpsaddrstrict(remote, p->remote) == 0)) {
                  plog(LLV_DEBUG, LOCATION, NULL,
                        "configuration found for %s.\n", buf);
                  return p;
            }

            /* save the pointer to the anonymous configuration */
            if (p->remote->sa_family == AF_UNSPEC)
                  anon = p;
      }

      if (allow_anon && anon != NULL) {
            plog(LLV_DEBUG, LOCATION, NULL,
                  "anonymous configuration selected for %s.\n", buf);
            return anon;
      }

      plog(LLV_DEBUG, LOCATION, NULL,
            "no remote configuration found.\n");

      return NULL;
}

struct remoteconf *
getrmconf(remote)
      struct sockaddr *remote;
{
      return getrmconf_strict(remote, 1);
}

struct remoteconf *
newrmconf()
{
      struct remoteconf *new;

      new = racoon_calloc(1, sizeof(*new));
      if (new == NULL)
            return NULL;

      new->proposal = NULL;

      /* set default */
      new->doitype = IPSEC_DOI;
      new->sittype = IPSECDOI_SIT_IDENTITY_ONLY;
      new->idvtype = IDTYPE_UNDEFINED;
      new->idvl_p = genlist_init();
      new->nonce_size = DEFAULT_NONCE_SIZE;
      new->passive = FALSE;
      new->ike_frag = FALSE;
      new->ini_contact = TRUE;
      new->mode_cfg = FALSE;
      new->pcheck_level = PROP_CHECK_STRICT;
      new->verify_identifier = FALSE;
      new->verify_cert = TRUE;
      new->getcert_method = ISAKMP_GETCERT_PAYLOAD;
      new->getcacert_method = ISAKMP_GETCERT_LOCALFILE;
      new->cacerttype = ISAKMP_CERT_X509SIGN;
      new->cacertfile = NULL;
      new->send_cert = TRUE;
      new->send_cr = TRUE;
      new->support_proxy = FALSE;
      bzero(&new->script[0], sizeof(char *) * (SCRIPT_MAX + 1));
      new->gen_policy = FALSE;
      new->retry_counter = lcconf->retry_counter;
      new->retry_interval = lcconf->retry_interval;
      new->nat_traversal = FALSE;
      new->rsa_private = genlist_init();
      new->rsa_public = genlist_init();
      new->idv = NULL;
      new->key = NULL;

      new->dpd = TRUE; /* Enable DPD support by default */
      new->dpd_interval = 0; /* Disable DPD checks by default */
      new->dpd_retry = 5;
      new->dpd_maxfails = 5;

      return new;
}

struct remoteconf *
copyrmconf(remote)
      struct sockaddr *remote;
{
      struct remoteconf *new, *old;

      old = getrmconf_strict (remote, 0);
      if (old == NULL) {
            plog (LLV_ERROR, LOCATION, NULL,
                  "Remote configuration for '%s' not found!\n",
                  saddr2str (remote));
            return NULL;
      }

      new = duprmconf (old);

      return new;
}

void *
dupidvl(entry, arg)
      void *entry;
      void *arg;
{
      struct idspec *id;
      struct idspec *old = (struct idspec *) entry;
      id = newidspec();
      if (!id) return (void *) -1;

      if (set_identifier(&id->id, old->idtype, old->id) != 0) 
            return (void *) -1;

      id->idtype = old->idtype;

      genlist_append(arg, id);
      return NULL;
}

struct remoteconf *
duprmconf (rmconf)
      struct remoteconf *rmconf;
{
      struct remoteconf *new;

      new = racoon_calloc(1, sizeof(*new));
      if (new == NULL)
            return NULL;
      memcpy (new, rmconf, sizeof (*new));
      // FIXME: We should duplicate the proposal as well.
      // This is now handled in the cfparse.y
      // new->proposal = ...;
      
      /* duplicate dynamic structures */
      if (new->etypes)
            new->etypes=dupetypes(new->etypes);
      new->idvl_p = genlist_init();
      genlist_foreach(rmconf->idvl_p, dupidvl, new->idvl_p);

      return new;
}

static void
idspec_free(void *data)
{
      vfree (((struct idspec *)data)->id);
      free (data);
}

void
delrmconf(rmconf)
      struct remoteconf *rmconf;
{
      if (rmconf->etypes)
            deletypes(rmconf->etypes);
      if (rmconf->idvl_p)
            genlist_free(rmconf->idvl_p, idspec_free);
      if (rmconf->dhgrp)
            oakley_dhgrp_free(rmconf->dhgrp);
      if (rmconf->proposal)
            delisakmpsa(rmconf->proposal);
      racoon_free(rmconf);
}

void
delisakmpsa(sa)
      struct isakmpsa *sa;
{
      if (sa->dhgrp)
            oakley_dhgrp_free(sa->dhgrp);
      if (sa->next)
            delisakmpsa(sa->next);
#ifdef HAVE_GSSAPI
      if (sa->gssid)
            vfree(sa->gssid);
#endif
      racoon_free(sa);
}

struct etypes *
dupetypes(orig)
      struct etypes *orig;
{
      struct etypes *new;

      if (!orig) 
            return NULL;

      new = racoon_malloc(sizeof(struct etypes));
      if (new == NULL) 
            return NULL;

      new->type = orig->type;
      new->next = NULL;

      if (orig->next)
            new->next=dupetypes(orig->next);

      return new;
}

void
deletypes(e)
      struct etypes *e;
{
      if (e->next)
            deletypes(e->next);
      racoon_free(e);
}

/*
 * insert into head of list.
 */
void
insrmconf(new)
      struct remoteconf *new;
{
      TAILQ_INSERT_HEAD(&rmtree, new, chain);
}

void
remrmconf(rmconf)
      struct remoteconf *rmconf;
{
      TAILQ_REMOVE(&rmtree, rmconf, chain);
}

void
flushrmconf()
{
      struct remoteconf *p, *next;

      for (p = TAILQ_FIRST(&rmtree); p; p = next) {
            next = TAILQ_NEXT(p, chain);
            remrmconf(p);
            delrmconf(p);
      }
}

void
initrmconf()
{
      TAILQ_INIT(&rmtree);
}

/* check exchange type to be acceptable */
struct etypes *
check_etypeok(rmconf, etype)
      struct remoteconf *rmconf;
      u_int8_t etype;
{
      struct etypes *e;

      for (e = rmconf->etypes; e != NULL; e = e->next) {
            if (e->type == etype)
                  break;
      }

      return e;
}

/*%%%*/
struct isakmpsa *
newisakmpsa()
{
      struct isakmpsa *new;

      new = racoon_calloc(1, sizeof(*new));
      if (new == NULL)
            return NULL;

      /*
       * Just for sanity, make sure this is initialized.  This is
       * filled in for real when the ISAKMP proposal is configured.
       */
      new->vendorid = VENDORID_UNKNOWN;

      new->next = NULL;
      new->rmconf = NULL;
#ifdef HAVE_GSSAPI
      new->gssid = NULL;
#endif

      return new;
}

/*
 * insert into tail of list.
 */
void
insisakmpsa(new, rmconf)
      struct isakmpsa *new;
      struct remoteconf *rmconf;
{
      struct isakmpsa *p;

      new->rmconf = rmconf;

      if (rmconf->proposal == NULL) {
            rmconf->proposal = new;
            return;
      }

      for (p = rmconf->proposal; p->next != NULL; p = p->next)
            ;
      p->next = new;

      return;
}

struct remoteconf *
foreachrmconf(rmconf_func_t rmconf_func, void *data)
{
      struct remoteconf *p, *ret = NULL;
      
      TAILQ_FOREACH_REVERSE(p, &rmtree, _rmtree, chain) {
            ret = (*rmconf_func)(p, data);
            if (ret)
                  break;
      }

      return ret;
}

static void *
dump_peers_identifiers (void *entry, void *arg)
{
      struct idspec *id = (struct idspec*) entry;
      char buf[1024], *pbuf;
      pbuf = buf;
      pbuf += sprintf (pbuf, "\tpeers_identifier %s",
                   s_idtype (id->idtype));
      if (id->id)
            pbuf += sprintf (pbuf, " \"%s\"", id->id->v);
      plog(LLV_INFO, LOCATION, NULL, "%s;\n", buf);
      return NULL;
}

static struct remoteconf *
dump_rmconf_single (struct remoteconf *p, void *data)
{
      struct etypes *etype = p->etypes;
      struct isakmpsa *prop = p->proposal;
      char buf[1024], *pbuf;

      pbuf = buf;
      pbuf += sprintf(pbuf, "remote %s", saddr2str(p->remote));
      if (p->inherited_from)
            pbuf += sprintf(pbuf, " inherit %s",
                        saddr2str(p->inherited_from->remote));
      plog(LLV_INFO, LOCATION, NULL, "%s {\n", buf);
      pbuf = buf;
      pbuf += sprintf(pbuf, "\texchange_type ");
      while (etype) {
            pbuf += sprintf (pbuf, "%s%s", s_etype(etype->type),
                         etype->next != NULL ? ", " : ";\n");
            etype = etype->next;
      }
      plog(LLV_INFO, LOCATION, NULL, "%s", buf);
      plog(LLV_INFO, LOCATION, NULL, "\tdoi %s;\n", s_doi(p->doitype));
      pbuf = buf;
      pbuf += sprintf(pbuf, "\tmy_identifier %s", s_idtype (p->idvtype));
      if (p->idvtype == IDTYPE_ASN1DN) {
            plog(LLV_INFO, LOCATION, NULL, "%s;\n", buf);
            plog(LLV_INFO, LOCATION, NULL, "\tcertificate_type %s \"%s\" \"%s\";\n",
                  p->certtype == ISAKMP_CERT_X509SIGN ? "x509" : "*UNKNOWN*",
                  p->mycertfile, p->myprivfile);
            switch (p->getcert_method) {
              case 0:
                  break;
              case ISAKMP_GETCERT_PAYLOAD:
                  plog(LLV_INFO, LOCATION, NULL, "\t/* peers certificate from payload */\n");
                  break;
              case ISAKMP_GETCERT_LOCALFILE:
                  plog(LLV_INFO, LOCATION, NULL, "\tpeers_certfile \"%s\";\n", p->peerscertfile);
                  break;
              case ISAKMP_GETCERT_DNS:
                  plog(LLV_INFO, LOCATION, NULL, "\tpeer_certfile dnssec;\n");
                  break;
              default:
                  plog(LLV_INFO, LOCATION, NULL, "\tpeers_certfile *UNKNOWN* (%d)\n", p->getcert_method);
            }
      }
      else {
            if (p->idv)
                  pbuf += sprintf (pbuf, " \"%s\"", p->idv->v);
            plog(LLV_INFO, LOCATION, NULL, "%s;\n", buf);
            genlist_foreach(p->idvl_p, &dump_peers_identifiers, NULL);
      }

      plog(LLV_INFO, LOCATION, NULL, "\tsend_cert %s;\n",
            s_switch (p->send_cert));
      plog(LLV_INFO, LOCATION, NULL, "\tsend_cr %s;\n",
            s_switch (p->send_cr));
      plog(LLV_INFO, LOCATION, NULL, "\tverify_cert %s;\n",
            s_switch (p->verify_cert));
      plog(LLV_INFO, LOCATION, NULL, "\tverify_identifier %s;\n",
            s_switch (p->verify_identifier));
      plog(LLV_INFO, LOCATION, NULL, "\tnat_traversal %s;\n",
            p->nat_traversal == NATT_FORCE ?
                  "force" : s_switch (p->nat_traversal));
      plog(LLV_INFO, LOCATION, NULL, "\tnonce_size %d;\n",
            p->nonce_size);
      plog(LLV_INFO, LOCATION, NULL, "\tpassive %s;\n",
            s_switch (p->passive));
      plog(LLV_INFO, LOCATION, NULL, "\tike_frag %s;\n",
            s_switch (p->ike_frag));
      plog(LLV_INFO, LOCATION, NULL, "\tinitial_contact %s;\n",
            s_switch (p->ini_contact));
      plog(LLV_INFO, LOCATION, NULL, "\tgenerate_policy %s;\n",
            s_switch (p->gen_policy));
      plog(LLV_INFO, LOCATION, NULL, "\tsupport_proxy %s;\n",
            s_switch (p->support_proxy));

      while (prop) {
            plog(LLV_INFO, LOCATION, NULL, "\n");
            plog(LLV_INFO, LOCATION, NULL,
                  "\t/* prop_no=%d, trns_no=%d, rmconf=%s */\n",
                  prop->prop_no, prop->trns_no,
                  saddr2str(prop->rmconf->remote));
            plog(LLV_INFO, LOCATION, NULL, "\tproposal {\n");
            plog(LLV_INFO, LOCATION, NULL, "\t\tlifetime time %lu sec;\n",
                  (long)prop->lifetime);
            plog(LLV_INFO, LOCATION, NULL, "\t\tlifetime bytes %zd;\n",
                  prop->lifebyte);
            plog(LLV_INFO, LOCATION, NULL, "\t\tdh_group %s;\n",
                  alg_oakley_dhdef_name(prop->dh_group));
            plog(LLV_INFO, LOCATION, NULL, "\t\tencryption_algorithm %s;\n", 
                  alg_oakley_encdef_name(prop->enctype));
            plog(LLV_INFO, LOCATION, NULL, "\t\thash_algorithm %s;\n", 
                  alg_oakley_hashdef_name(prop->hashtype));
            plog(LLV_INFO, LOCATION, NULL, "\t\tauthentication_method %s;\n", 
                  alg_oakley_authdef_name(prop->authmethod));
            plog(LLV_INFO, LOCATION, NULL, "\t}\n");
            prop = prop->next;
      }
      plog(LLV_INFO, LOCATION, NULL, "}\n");
      plog(LLV_INFO, LOCATION, NULL, "\n");

      return NULL;
}

void
dumprmconf()
{
      foreachrmconf (dump_rmconf_single, NULL);
}

struct idspec *
newidspec()
{
      struct idspec *new;

      new = racoon_calloc(1, sizeof(*new));
      if (new == NULL)
            return NULL;
      new->idtype = IDTYPE_ADDRESS;

      return new;
}


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