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