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 "isakmp.h"
  71 #include "isakmp_xauth.h"
  72 #include "isakmp_cfg.h"
  73 #endif
  74 #include "remoteconf.h"
  75 #include "localconf.h"
  76 #include "session.h"
  77 #include "oakley.h"
  78 #include "pfkey.h"
  79 #include "policy.h"
  80 #include "crypto_openssl.h"
  81 #include "vendorid.h"
  82
  83 #if !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR)
  84 #include <sandbox.h>
  85 #endif // !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR)
  86
  87
  88 #include <CoreFoundation/CoreFoundation.h>
  89 #include "power_mgmt.h"
  90 #include "preferences.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 dump_config = 0;     /* dump parsed config file. */
  97 static int exec_done = 0;       /* we've already been exec'd */
  98
  99 #ifdef TOP_PACKAGE
 100 static char version[] = "@(#)" TOP_PACKAGE_STRING " (" TOP_PACKAGE_URL ")";
 101 #else /* TOP_PACKAGE */
 102 static char version[] = "@(#) racoon / IPsec-tools";
 103 #endif /* TOP_PACKAGE */
 104
 105 int main (int, char **);
 106 static void usage (void);
 107 static void parse (int, char **);
 108 static void restore_params (void);
 109 static void save_params (void);
 110 static void saverestore_params (int);
 111 static void cleanup_pidfile (void);
 112 #if 0 // <rdar://problem/9286626>
 113 int launchedbylaunchd (void);
 114 #endif
 115
 116 pid_t racoon_pid = 0;
 117 int   launchdlaunched = 0;
 118 int print_pid = 1;      /* for racoon only */
 119
 120
 121 void
 122 usage()
 123 {
 124         printf("usage: racoon [-BdDFvs%s] %s[-f (file)] [-l (file)] [-p (port)]\n",
 125 #ifdef INET6
 126                 "46",
 127 #else
 128                 "",
 129 #endif
 130                 ""
 131                 );
 132         printf("   -d: debug level, more -d will generate more debug message.\n");
 133         printf("   -D: started by LaunchD (implies daemon mode).\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         printf("   -f: pathname for configuration file.\n");
 144         printf("   -l: pathname for log file.\n");
 145         printf("   -p: port number for isakmp (default: %d).\n", PORT_ISAKMP);
 146         printf("   -P: port number for NAT-T (default: %d).\n", PORT_ISAKMP_NATT);
 147         exit(1);
 148 }
 149
 150 int
 151 main(ac, av)
 152         int ac;
 153         char **av;
 154 {
 155         int error;
 156
 157 #if !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR)
 158         char *errorbuf;
 159         if (sandbox_init("racoon", SANDBOX_NAMED, &errorbuf) == -1) {
 160                 plog(ASL_LEVEL_ERR, "initializing sandbox failed %s", errorbuf);
 161                 sandbox_free_error(errorbuf);
 162                 return -1;
 163         }
 164 #endif // !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR)
 165
 166         /*
 167          * Check IPSec plist
 168          */
 169         prefsinit();
 170         ploginit();
 171
 172         if (geteuid() != 0) {
 173                 errx(1, "must be root to invoke this program.");
 174                 /* NOTREACHED*/
 175         }
 176
 177         /*
 178          * Don't let anyone read files I write.  Although some files (such as
 179          * the PID file) can be other readable, we dare to use the global mask,
 180          * because racoon uses fopen(3), which can't specify the permission
 181          * at the creation time.
 182          */
 183         umask(077);
 184         if (umask(077) != 077) {
 185                 errx(1, "could not set umask");
 186                 /* NOTREACHED*/
 187         }
 188
 189 #ifdef HAVE_OPENSSL
 190         eay_init();
 191 #endif
 192
 193         initlcconf();
 194         initrmconf();
 195         oakley_dhinit();
 196         compute_vendorids();
 197
 198         parse(ac, av);
 199
 200         plog(ASL_LEVEL_NOTICE, "racoon started: pid=%d  started by: %d, launchdlaunched %d\n", getpid(), getppid(), launchdlaunched);
 201         plog(ASL_LEVEL_NOTICE, "%s\n", version);
 202 #ifdef HAVE_OPENSSL
 203         plog(ASL_LEVEL_NOTICE, "@(#)"
 204             "This product linked %s (http://www.openssl.org/)"
 205             "\n", eay_version());
 206 #endif
 207         plog(ASL_LEVEL_NOTICE, "Reading configuration from \"%s\"\n",
 208             lcconf->racoon_conf);
 209
 210     //%%%%% this sould probably be moved to session()
 211         if (pfkey_init() < 0) {
 212                 errx(1, "failed to initialize pfkey.\n");
 213                 /* NOTREACHED*/
 214         }
 215
 216         /*
 217          * in order to prefer the parameters by command line,
 218          * saving some parameters before parsing configuration file.
 219          */
 220         save_params();
 221         error = cfparse();
 222         if (error != 0)
 223                 errx(1, "failed to parse configuration file.");
 224         restore_params();
 225
 226         if (lcconf->logfile_param == NULL && logFileStr[0] == 0)
 227                 plogresetfile(lcconf->pathinfo[LC_PATHTYPE_LOGFILE]);
 228
 229 #ifdef ENABLE_NATT
 230         /* Tell the kernel which port to use for UDP encapsulation */
 231         {
 232                 int udp_port = PORT_ISAKMP_NATT;
 233                 if (sysctlbyname("net.inet.ipsec.esp_port", NULL, NULL, &udp_port, sizeof(udp_port)) != 0)
 234                         errx(1, "couldn't set net.inet.ipsec.esp_port to %d. (%s)",
 235                                 udp_port, strerror(errno));
 236         }
 237 #endif
 238
 239
 240 #ifdef ENABLE_HYBRID
 241         if(isakmp_cfg_config.network4 && isakmp_cfg_config.pool_size == 0)
 242                 if ((error = isakmp_cfg_resize_pool(ISAKMP_CFG_MAX_CNX)) != 0)
 243                         return error;
 244 #endif
 245
 246         if (dump_config)
 247                 dumprmconf ();
 248
 249         /*
 250          * install SAs from the specified file.  If the file is not specified
 251          * by the configuration file, racoon will exit.
 252          */
 253
 254         if (f_foreground)
 255                 close(0);
 256         else {
 257                 if ( !exec_done && launchdlaunched ){
 258                         plog(ASL_LEVEL_NOTICE,
 259                                  "racoon launched by launchd.\n");
 260                         exec_done = 1;
 261                         if (atexit(cleanup_pidfile) < 0) {
 262                                 plog(ASL_LEVEL_ERR,
 263                                          "cannot register pidfile cleanup");
 264                         }
 265                 }else {
 266
 267                         if (exec_done) {
 268                                 if (atexit(cleanup_pidfile) < 0) {
 269                                         plog(ASL_LEVEL_ERR,
 270                                                 "cannot register pidfile cleanup");
 271                                 }
 272                         } else {
 273                                 #define MAX_EXEC_ARGS 32
 274
 275                                 char *args[MAX_EXEC_ARGS + 2]; /* 2 extra, for '-x' and NULL */
 276                                 char *env[1] = {0};
 277                                 int     i;
 278
 279                                 if (ac > MAX_EXEC_ARGS) {
 280                                         plog(ASL_LEVEL_ERR,
 281                                                 "too many arguments.\n");
 282                                         exit(1);
 283                                 }
 284
 285                                 if (daemon(0, 0) < 0) {
 286                                         errx(1, "failed to be daemon. (%s)",
 287                                                 strerror(errno));
 288                                 }
 289
 290                                 /* Radar 5129006 - Prevent non-root user from killing racoon
 291                                  * when launched by setuid process
 292                                  */
 293                                 if (setuid(0)) {
 294                                         plog(ASL_LEVEL_ERR,
 295                                                 "cannot set uid.\n");
 296                                         exit(1);
 297                                 }
 298                                 if (setgid(0)) {
 299                                         plog(ASL_LEVEL_ERR,
 300                                                 "cannot set gid.\n");
 301                                         exit(1);
 302                                 }
 303
 304                                 /* setup args to re-exec - for CoreFoundation issues */
 305                                 args[0] = PATHRACOON;
 306                                 for (i = 1; i < ac; i++)
 307                                         args[i] = *(av + i);
 308                                 args[ac] = "-x";                /* tells racoon its been exec'd */
 309                                 args[ac+1] = 0;
 310
 311                                 execve(PATHRACOON, args, env);
 312                                 plog(ASL_LEVEL_ERR,
 313                                                 "failed to exec racoon. (%s)", strerror(errno));
 314                                 exit(1);
 315                         }
 316                 }
 317         }
 318
 319
 320     /* start the session */
 321         session();
 322 }
 323
 324 #if 0 // <rdar://problem/9286626>
 325 int
 326 launchedbylaunchd(){
 327         launch_data_t checkin_response = NULL;
 328
 329         if ((checkin_response = launch_socket_service_check_in()) == NULL) {
 330                 plog(LLV_ERROR, LOCATION, NULL,
 331                          "launch_socket_service_check_in fails.\n");
 332                 launchdlaunched = 0;
 333                 goto done;
 334         }
 335         if (LAUNCH_DATA_ERRNO == launch_data_get_type(checkin_response)) {
 336                 plog(LLV_ERROR, LOCATION, NULL,
 337                          "launch_data_get_type fails errno %d.\n", launch_data_get_errno(checkin_response));
 338                 launchdlaunched = 0;
 339                 goto done;
 340         }
 341         launchdlaunched = 1;
 342 done:
 343         /* clean up before we leave */
 344         if ( checkin_response )
 345                 launch_data_free(checkin_response);
 346         return launchdlaunched;
 347 }
 348 #endif
 349
 350 static void
 351 cleanup_pidfile()
 352 {
 353         char pid_file[MAXPATHLEN];
 354         pid_t p = getpid();
 355
 356         /* if it's not child process, clean everything */
 357         if (racoon_pid == p) {
 358                 if (lcconf->pathinfo[LC_PATHTYPE_PIDFILE] == NULL)
 359                         strlcpy(pid_file, _PATH_VARRUN "racoon.pid", sizeof(pid_file));
 360                 else if (lcconf->pathinfo[LC_PATHTYPE_PIDFILE][0] == '/')
 361                         strlcpy(pid_file, lcconf->pathinfo[LC_PATHTYPE_PIDFILE], sizeof(pid_file));
 362                 else {
 363                         strlcat(pid_file, _PATH_VARRUN, sizeof(pid_file));
 364                         strlcat(pid_file, lcconf->pathinfo[LC_PATHTYPE_PIDFILE], sizeof(pid_file));
 365                 }
 366                 (void) unlink(pid_file);
 367         }
 368 }
 369
 370
 371 static void
 372 parse(ac, av)
 373         int ac;
 374         char **av;
 375 {
 376         extern char *optarg;
 377         extern int optind;
 378         int c;
 379 #ifdef YYDEBUG
 380         extern int yydebug;
 381 #endif
 382
 383         pname = strrchr(*av, '/');
 384         if (pname)
 385                 pname++;
 386         else
 387                 pname = *av;
 388
 389         while ((c = getopt(ac, av, "dDLFp:P:a:f:l:vsZBCx"
 390 #ifdef YYDEBUG
 391                         "y"
 392 #endif
 393 #ifdef INET6
 394                         "46"
 395 #endif
 396                         )) != -1) {
 397                 switch (c) {
 398                 case 'd':
 399                         plogsetlevel(ASL_LEVEL_DEBUG);
 400                         break;
 401                 case 'D':
 402                         if (f_foreground) {
 403                                 fprintf(stderr, "-D and -F are mutually exclusive\n");
 404                                 exit(1);
 405                         }
 406                         launchdlaunched = 1;
 407                         break;
 408                 case 'L':
 409                         print_location = 1;
 410                         break;
 411                 case 'F':
 412                         if (launchdlaunched) {
 413                                 fprintf(stderr, "-D and -F are mutually exclusive\n");
 414                                 exit(1);
 415                         }
 416                         printf("Foreground mode.\n");
 417                         f_foreground = 1;
 418                         break;
 419                 case 'p':
 420                         lcconf->port_isakmp = atoi(optarg);
 421                         break;
 422                 case 'P':
 423                         lcconf->port_isakmp_natt = atoi(optarg);
 424                         break;
 425                 case 'a':
 426                         fprintf(stderr, "%s: the option is disabled "
 427                             "in the configuration\n", pname);
 428                         exit(1);
 429                 case 'f':
 430                         lcconf->racoon_conf = optarg;
 431                         break;
 432                 case 'l':
 433                         lcconf->logfile_param = optarg;
 434                         break;
 435                 case 'v':
 436                         vflag++;
 437                         break;
 438                 case 's':
 439                         lcconf->auto_exit_state &= ~LC_AUTOEXITSTATE_CLIENT;    /* override default auto exit state */
 440                         break;
 441                 case 'x':
 442                         exec_done = 1;
 443                         break;
 444                 case 'Z':
 445                         /*
 446                          * only local test.
 447                          * To specify -Z option and to choice a appropriate
 448                          * port number for ISAKMP, you can launch some racoons
 449                          * on the local host for debug.
 450                          * pk_sendadd() on initiator side is always failed
 451                          * even if this flag is used.  Because there is same
 452                          * spi in the SAD which is inserted by pk_sendgetspi()
 453                          * on responder side.
 454                          */
 455                         printf("Local test mode.\n");
 456                         f_local = 1;
 457                         break;
 458 #ifdef YYDEBUG
 459                 case 'y':
 460                         yydebug = 1;
 461                         break;
 462 #endif
 463 #ifdef INET6
 464                 case '4':
 465                         lcconf->default_af = AF_INET;
 466                         break;
 467                 case '6':
 468                         lcconf->default_af = AF_INET6;
 469                         break;
 470 #endif
 471                 case 'C':
 472                         dump_config++;
 473                         break;
 474                 default:
 475                         usage();
 476                         /* NOTREACHED */
 477                 }
 478         }
 479         ac -= optind;
 480         av += optind;
 481
 482         if (ac != 0) {
 483                 usage();
 484                 /* NOTREACHED */
 485         }
 486
 487         return;
 488 }
 489
 490 static void
 491 restore_params()
 492 {
 493         saverestore_params(1);
 494 }
 495
 496 static void
 497 save_params()
 498 {
 499         saverestore_params(0);
 500 }
 501
 502 static void
 503 saverestore_params(f)
 504         int f;
 505 {
 506         static u_int16_t s_port_isakmp;
 507
 508         /* 0: save, 1: restore */
 509         if (f) {
 510                 lcconf->port_isakmp = s_port_isakmp;
 511         } else {
 512                 s_port_isakmp = lcconf->port_isakmp;
 513         }
 514 }