ipsec-tools/racoon/main.c

   1 /* $Id: main.c,v 1.14.2.3 2005/11/06 17:18:26 monas 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/stat.h>
  38 #include <sys/sysctl.h>
  39
  40 #include <netinet/in.h>
  41
  42 #include <stdlib.h>
  43 #include <stdio.h>
  44 #include <string.h>
  45 #include <errno.h>
  46 #include <limits.h>
  47 #ifdef HAVE_UNISTD_H
  48 #include <unistd.h>
  49 #endif
  50 #include <paths.h>
  51 #include <err.h>
  52 #include <launch.h>
  53
  54 /*
  55  * If we're using a debugging malloc library, this may define our
  56  * wrapper stubs.
  57  */
  58 #define RACOON_MAIN_PROGRAM
  59 #include "gcmalloc.h"
  60
  61 #include "var.h"
  62 #include "misc.h"
  63 #include "vmbuf.h"
  64 #include "plog.h"
  65 #include "debug.h"
  66
  67 #include "cfparse_proto.h"
  68 #include "isakmp_var.h"
  69 #ifdef ENABLE_HYBRID
  70 #include <resolv.h>
  71 #include "isakmp.h"
  72 #include "isakmp_xauth.h"
  73 #include "isakmp_cfg.h"
  74 #endif
  75 #include "remoteconf.h"
  76 #include "localconf.h"
  77 #include "session.h"
  78 #include "oakley.h"
  79 #include "pfkey.h"
  80 #include "policy.h"
  81 #include "crypto_openssl.h"
  82 #include "backupsa.h"
  83 #include "vendorid.h"
  84
  85 #include <CoreFoundation/CoreFoundation.h>
  86 #include <SystemConfiguration/SystemConfiguration.h>
  87 #ifndef TARGET_OS_EMBEDDED
  88 #include <sandbox.h>
  89 #endif // !TARGET_OS_EMBEDDED
  90 #include "power_mgmt.h"
  91
  92 //#include "package_version.h"
  93
  94 int f_local = 0;        /* local test mode.  behave like a wall. */
  95 int vflag = 1;          /* for print-isakmp.c */
  96 static int loading_sa = 0;      /* install sa when racoon boots up. */
  97 static int dump_config = 0;     /* dump parsed config file. */
  98 static int exec_done = 0;       /* we've already been exec'd */
  99
 100 #ifdef TOP_PACKAGE
 101 static char version[] = "@(#)" TOP_PACKAGE_STRING " (" TOP_PACKAGE_URL ")";
 102 #else /* TOP_PACKAGE */
 103 static char version[] = "@(#) racoon / IPsec-tools";
 104 #endif /* TOP_PACKAGE */
 105
 106 int main __P((int, char **));
 107 static void usage __P((void));
 108 static void parse __P((int, char **));
 109 static void restore_params __P((void));
 110 static void save_params __P((void));
 111 static void saverestore_params __P((int));
 112 static void cleanup_pidfile __P((void));
 113 int launchedbylaunchd __P((void));
 114
 115 pid_t racoon_pid = 0;
 116 int print_pid = 1;      /* for racoon only */
 117 char  logFileStr[MAXPATHLEN+1];
 118
 119 void
 120 usage()
 121 {
 122         printf("usage: racoon [-BdFvs%s] %s[-f (file)] [-l (file)] [-p (port)]\n",
 123 #ifdef INET6
 124                 "46",
 125 #else
 126                 "",
 127 #endif
 128 #ifdef ENABLE_ADMINPORT
 129                 "[-a (port)] "
 130 #else
 131                 ""
 132 #endif
 133                 );
 134         printf("   -B: install SA to the kernel from the file "
 135                 "specified by the configuration file.\n");
 136         printf("   -d: debug level, more -d will generate more debug message.\n");
 137         printf("   -C: dump parsed config file.\n");
 138         printf("   -L: include location in debug messages\n");
 139         printf("   -F: run in foreground, do not become daemon.\n");
 140         printf("   -v: be more verbose\n");
 141         printf("   -s: override enable auto exit\n");
 142 #ifdef INET6
 143         printf("   -4: IPv4 mode.\n");
 144         printf("   -6: IPv6 mode.\n");
 145 #endif
 146 #ifdef ENABLE_ADMINPORT
 147         printf("   -a: port number for admin port.\n");
 148 #endif
 149         printf("   -f: pathname for configuration file.\n");
 150         printf("   -l: pathname for log file.\n");
 151         printf("   -p: port number for isakmp (default: %d).\n", PORT_ISAKMP);
 152         printf("   -P: port number for NAT-T (default: %d).\n", PORT_ISAKMP_NATT);
 153         exit(1);
 154 }
 155
 156 int
 157 main(ac, av)
 158         int ac;
 159         char **av;
 160 {
 161         int error;
 162 #ifndef TARGET_OS_EMBEDDED
 163         char *sb_errorbuf = NULL;
 164 #endif // !TARGET_OS_EMBEDDED
 165
 166 #ifndef TARGET_OS_EMBEDDED
 167         if (sandbox_init("racoon", SANDBOX_NAMED, &sb_errorbuf) == -1) {
 168                 if (sb_errorbuf) {
 169                         syslog(LOG_ERR, "sandbox_init failed: %s\n", sb_errorbuf);
 170                         sandbox_free_error(sb_errorbuf);
 171                         sb_errorbuf = NULL;
 172                 } else {
 173                         syslog(LOG_ERR, "sandbox_init failed\n");
 174                 }
 175         }
 176 #endif // !TARGET_OS_EMBEDDED
 177
 178         if (geteuid() != 0) {
 179                 errx(1, "must be root to invoke this program.");
 180                 /* NOTREACHED*/
 181         }
 182
 183         /*
 184          * Don't let anyone read files I write.  Although some files (such as
 185          * the PID file) can be other readable, we dare to use the global mask,
 186          * because racoon uses fopen(3), which can't specify the permission
 187          * at the creation time.
 188          */
 189         umask(077);
 190         if (umask(077) != 077) {
 191                 errx(1, "could not set umask");
 192                 /* NOTREACHED*/
 193         }
 194
 195 #ifdef DEBUG_RECORD_MALLOCATION
 196         DRM_init();
 197 #endif
 198
 199         logFileStr[0] = 0;
 200
 201 #ifdef HAVE_OPENSSL
 202         eay_init();
 203 #endif
 204
 205         initlcconf();
 206         initrmconf();
 207         oakley_dhinit();
 208         compute_vendorids();
 209
 210         parse(ac, av);
 211         plogmtxinit();
 212
 213         /*
 214          * Check IPSec plist
 215          */
 216         {
 217                 SCPreferencesRef        prefs = NULL;
 218                 CFPropertyListRef       globals;
 219                 CFStringRef                     logFileRef;
 220                 CFNumberRef                     debugLevelRef;
 221
 222                 int                                     level = 0;
 223
 224                 logFileStr[0] = 0;
 225
 226             if ((prefs = SCPreferencesCreate(0, CFSTR("racoon"), CFSTR("com.apple.ipsec.plist"))) == NULL)
 227                         goto skip;
 228                 globals = SCPreferencesGetValue(prefs, CFSTR("Global"));
 229                 if (!globals || (CFGetTypeID(globals) != CFDictionaryGetTypeID()))
 230                         goto skip;
 231                 debugLevelRef = CFDictionaryGetValue(globals, CFSTR("DebugLevel"));
 232                 if (!debugLevelRef || (CFGetTypeID(debugLevelRef) != CFNumberGetTypeID()))
 233                         goto skip;
 234                 CFNumberGetValue(debugLevelRef, kCFNumberSInt32Type, &level);
 235                 switch (level)
 236                 {
 237                         case 0:
 238                                 loglevel = 5;
 239                                 goto skip;
 240                                 break;
 241                         case 1:
 242                                 loglevel = 6;
 243                                 break;
 244                         case 2:
 245                                 loglevel = 7;
 246                                 break;
 247                         default:
 248                                 break; /* invalid - ignore */
 249                 }
 250
 251                 logFileRef = CFDictionaryGetValue(globals, CFSTR("DebugLogfile"));
 252                 if (!logFileRef || (CFGetTypeID(logFileRef) != CFStringGetTypeID())) {
 253                         goto skip;
 254                 }
 255                 CFStringGetCString(logFileRef, logFileStr, MAXPATHLEN, kCFStringEncodingMacRoman);
 256 skip:
 257                 if (prefs)
 258                         CFRelease(prefs);
 259         }
 260
 261         if (logFileStr[0])
 262                         plogset(logFileStr);
 263         else
 264                 if (lcconf->logfile_param)
 265                         plogset(lcconf->logfile_param);
 266
 267         ploginit();
 268
 269         plog(LLV_INFO, LOCATION, NULL, "***** racoon started: pid=%d  started by: %d\n", getpid(), getppid());
 270         plog(LLV_INFO, LOCATION, NULL, "%s\n", version);
 271 #ifdef HAVE_OPENSSL
 272         plog(LLV_INFO, LOCATION, NULL, "@(#)"
 273             "This product linked %s (http://www.openssl.org/)"
 274             "\n", eay_version());
 275 #endif
 276         plog(LLV_INFO, LOCATION, NULL, "Reading configuration from \"%s\"\n",
 277             lcconf->racoon_conf);
 278
 279         if (pfkey_init() < 0) {
 280                 errx(1, "something error happened "
 281                         "while pfkey initializing.");
 282                 /* NOTREACHED*/
 283         }
 284
 285 #ifdef ENABLE_HYBRID
 286         if (isakmp_cfg_init(ISAKMP_CFG_INIT_COLD))
 287                 errx(1, "could not initialize ISAKMP mode config structures");
 288 #endif
 289
 290 #ifdef HAVE_LIBLDAP
 291         if (xauth_ldap_init() != 0)
 292                 errx(1, "could not initialize libldap");
 293 #endif
 294
 295         /*
 296          * in order to prefer the parameters by command line,
 297          * saving some parameters before parsing configuration file.
 298          */
 299         save_params();
 300         error = cfparse();
 301         if (error != 0)
 302                 errx(1, "failed to parse configuration file.");
 303         restore_params();
 304
 305         if (lcconf->logfile_param == NULL && logFileStr[0] == 0)
 306                 plogreset(lcconf->pathinfo[LC_PATHTYPE_LOGFILE]);
 307
 308 #ifdef ENABLE_NATT
 309         /* Tell the kernel which port to use for UDP encapsulation */
 310         {
 311                 int udp_port = PORT_ISAKMP_NATT;
 312                 if (sysctlbyname("net.inet.ipsec.esp_port", NULL, NULL, &udp_port, sizeof(udp_port)) != 0)
 313                         errx(1, "couldn't set net.inet.ipsec.esp_port to %d. (%s)",
 314                                 udp_port, strerror(errno));
 315         }
 316 #endif
 317
 318 #ifdef HAVE_LIBRADIUS
 319         if (xauth_radius_init() != 0) {
 320                 errx(1, "could not initialize libradius");
 321                 /* NOTREACHED*/
 322         }
 323 #endif
 324
 325 #ifdef ENABLE_HYBRID
 326         if(isakmp_cfg_config.network4 && isakmp_cfg_config.pool_size == 0)
 327                 if ((error = isakmp_cfg_resize_pool(ISAKMP_CFG_MAX_CNX)) != 0)
 328                         return error;
 329 #endif
 330
 331         if (dump_config)
 332                 dumprmconf ();
 333
 334         /*
 335          * install SAs from the specified file.  If the file is not specified
 336          * by the configuration file, racoon will exit.
 337          */
 338         if (loading_sa && !f_local) {
 339                 if (backupsa_from_file() != 0)
 340                         errx(1, "something error happened "
 341                                 "SA recovering.");
 342         }
 343
 344         if (f_foreground)
 345                 close(0);
 346         else {
 347                 if ( !exec_done && launchedbylaunchd() ){
 348                         plog(LLV_INFO, LOCATION, NULL,
 349                                  "racoon launched by launchd.\n");
 350                         exec_done = 1;
 351                         if (atexit(cleanup_pidfile) < 0) {
 352                                 plog(LLV_ERROR, LOCATION, NULL,
 353                                          "cannot register pidfile cleanup");
 354                         }
 355                 }else {
 356
 357                         if (exec_done) {
 358                                 if (atexit(cleanup_pidfile) < 0) {
 359                                         plog(LLV_ERROR, LOCATION, NULL,
 360                                                 "cannot register pidfile cleanup");
 361                                 }
 362                         } else {
 363                                 #define MAX_EXEC_ARGS 32
 364
 365                                 char *args[MAX_EXEC_ARGS + 2]; /* 2 extra, for '-x' and NULL */
 366                                 char *env[1] = {0};
 367                                 int     i;
 368
 369                                 if (ac > MAX_EXEC_ARGS) {
 370                                         plog(LLV_ERROR, LOCATION, NULL,
 371                                                 "too many arguments.\n");
 372                                         exit(1);
 373                                 }
 374
 375                                 if (daemon(0, 0) < 0) {
 376                                         errx(1, "failed to be daemon. (%s)",
 377                                                 strerror(errno));
 378                                 }
 379
 380                                 /* Radar 5129006 - Prevent non-root user from killing racoon
 381                                  * when launched by setuid process
 382                                  */
 383                                 if (setuid(0)) {
 384                                         plog(LLV_ERROR, LOCATION, NULL,
 385                                                 "cannot set uid.\n");
 386                                         exit(1);
 387                                 }
 388                                 if (setgid(0)) {
 389                                         plog(LLV_ERROR, LOCATION, NULL,
 390                                                 "cannot set gid.\n");
 391                                         exit(1);
 392                                 }
 393
 394                                 /* setup args to re-exec - for CoreFoundation issues */
 395                                 args[0] = PATHRACOON;
 396                                 for (i = 1; i < ac; i++)
 397                                         args[i] = *(av + i);
 398                                 args[ac] = "-x";                /* tells racoon its been exec'd */
 399                                 args[ac+1] = 0;
 400
 401                                 execve(PATHRACOON, args, env);
 402                                 plog(LLV_ERROR, LOCATION, NULL,
 403                                                 "failed to exec racoon. (%s)", strerror(errno));
 404                                 exit(1);
 405                         }
 406                 }
 407         }
 408
 409         session();
 410
 411         exit(0);
 412 }
 413
 414
 415 int
 416 launchedbylaunchd(){
 417         int             launchdlaunched = 1;
 418         launch_data_t checkin_response = NULL;
 419         launch_data_t checkin_request = NULL;
 420
 421         /* check in with launchd */
 422         if ((checkin_request = launch_data_new_string(LAUNCH_KEY_CHECKIN)) == NULL) {
 423                 plog(LLV_ERROR, LOCATION, NULL,
 424                          "launch_data_new_string fails.\n");
 425                 launchdlaunched = 0;
 426                 goto done;
 427         }
 428         if ((checkin_response = launch_msg(checkin_request)) == NULL) {
 429                 plog(LLV_ERROR, LOCATION, NULL,
 430                          "launch_msg fails.\n");
 431                 launchdlaunched = 0;
 432                 goto done;
 433         }
 434         if (LAUNCH_DATA_ERRNO == launch_data_get_type(checkin_response)) {
 435                 plog(LLV_ERROR, LOCATION, NULL,
 436                          "launch_data_get_type fails errno %d.\n", launch_data_get_errno(checkin_response));
 437                 launchdlaunched = 0;
 438                 goto done;
 439         }
 440
 441 done:
 442         /* clean up before we leave */
 443         if ( checkin_request )
 444                 launch_data_free(checkin_request);
 445         if ( checkin_response )
 446                 launch_data_free(checkin_response);
 447         return launchdlaunched;
 448 }
 449
 450 static void
 451 cleanup_pidfile()
 452 {
 453         char pid_file[MAXPATHLEN];
 454         pid_t p = getpid();
 455
 456         /* if it's not child process, clean everything */
 457         if (racoon_pid == p) {
 458                 if (lcconf->pathinfo[LC_PATHTYPE_PIDFILE] == NULL)
 459                         strlcpy(pid_file, _PATH_VARRUN "racoon.pid", sizeof(pid_file));
 460                 else if (lcconf->pathinfo[LC_PATHTYPE_PIDFILE][0] == '/')
 461                         strlcpy(pid_file, lcconf->pathinfo[LC_PATHTYPE_PIDFILE], sizeof(pid_file));
 462                 else {
 463                         strlcat(pid_file, _PATH_VARRUN, sizeof(pid_file));
 464                         strlcat(pid_file, lcconf->pathinfo[LC_PATHTYPE_PIDFILE], sizeof(pid_file));
 465                 }
 466                 (void) unlink(pid_file);
 467         }
 468 }
 469
 470
 471 static void
 472 parse(ac, av)
 473         int ac;
 474         char **av;
 475 {
 476         extern char *optarg;
 477         extern int optind;
 478         int c;
 479 #ifdef YYDEBUG
 480         extern int yydebug;
 481 #endif
 482
 483         pname = strrchr(*av, '/');
 484         if (pname)
 485                 pname++;
 486         else
 487                 pname = *av;
 488
 489 #if 0   /* for debugging */
 490         loglevel += 2;
 491         plogset("/tmp/racoon.log");
 492 #endif
 493
 494         while ((c = getopt(ac, av, "dLFp:P:a:f:l:vsZBCx"
 495 #ifdef YYDEBUG
 496                         "y"
 497 #endif
 498 #ifdef INET6
 499                         "46"
 500 #endif
 501                         )) != -1) {
 502                 switch (c) {
 503                 case 'd':
 504                         loglevel++;
 505                         break;
 506                 case 'L':
 507                         print_location = 1;
 508                         break;
 509                 case 'F':
 510                         printf("Foreground mode.\n");
 511                         f_foreground = 1;
 512                         break;
 513                 case 'p':
 514                         lcconf->port_isakmp = atoi(optarg);
 515                         break;
 516                 case 'P':
 517                         lcconf->port_isakmp_natt = atoi(optarg);
 518                         break;
 519                 case 'a':
 520 #ifdef ENABLE_ADMINPORT
 521                         lcconf->port_admin = atoi(optarg);
 522                         break;
 523 #else
 524                         fprintf(stderr, "%s: the option is disabled "
 525                             "in the configuration\n", pname);
 526                         exit(1);
 527 #endif
 528                 case 'f':
 529                         lcconf->racoon_conf = optarg;
 530                         break;
 531                 case 'l':
 532                         lcconf->logfile_param = optarg;
 533                         break;
 534                 case 'v':
 535                         vflag++;
 536                         break;
 537                 case 's':
 538                         lcconf->auto_exit_state &= ~LC_AUTOEXITSTATE_CLIENT;    /* override default auto exit state */
 539                         break;
 540                 case 'x':
 541                         exec_done = 1;
 542                         break;
 543                 case 'Z':
 544                         /*
 545                          * only local test.
 546                          * To specify -Z option and to choice a appropriate
 547                          * port number for ISAKMP, you can launch some racoons
 548                          * on the local host for debug.
 549                          * pk_sendadd() on initiator side is always failed
 550                          * even if this flag is used.  Because there is same
 551                          * spi in the SAD which is inserted by pk_sendgetspi()
 552                          * on responder side.
 553                          */
 554                         printf("Local test mode.\n");
 555                         f_local = 1;
 556                         break;
 557 #ifdef YYDEBUG
 558                 case 'y':
 559                         yydebug = 1;
 560                         break;
 561 #endif
 562 #ifdef INET6
 563                 case '4':
 564                         lcconf->default_af = AF_INET;
 565                         break;
 566                 case '6':
 567                         lcconf->default_af = AF_INET6;
 568                         break;
 569 #endif
 570                 case 'B':
 571                         loading_sa++;
 572                         break;
 573                 case 'C':
 574                         dump_config++;
 575                         break;
 576                 default:
 577                         usage();
 578                         /* NOTREACHED */
 579                 }
 580         }
 581         ac -= optind;
 582         av += optind;
 583
 584         if (ac != 0) {
 585                 usage();
 586                 /* NOTREACHED */
 587         }
 588
 589         return;
 590 }
 591
 592 static void
 593 restore_params()
 594 {
 595         saverestore_params(1);
 596 }
 597
 598 static void
 599 save_params()
 600 {
 601         saverestore_params(0);
 602 }
 603
 604 static void
 605 saverestore_params(f)
 606         int f;
 607 {
 608         static u_int16_t s_port_isakmp;
 609 #ifdef ENABLE_ADMINPORT
 610         static u_int16_t s_port_admin;
 611 #endif
 612
 613         /* 0: save, 1: restore */
 614         if (f) {
 615                 lcconf->port_isakmp = s_port_isakmp;
 616 #ifdef ENABLE_ADMINPORT
 617                 lcconf->port_admin = s_port_admin;
 618 #endif
 619         } else {
 620                 s_port_isakmp = lcconf->port_isakmp;
 621 #ifdef ENABLE_ADMINPORT
 622                 s_port_admin = lcconf->port_admin;
 623 #endif
 624         }
 625 }