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 "vendorid.h"
  83
  84 #include <CoreFoundation/CoreFoundation.h>
  85 #include "power_mgmt.h"
  86 #include "preferences.h"
  87
  88 //#include "package_version.h"
  89
  90 int f_local = 0;        /* local test mode.  behave like a wall. */
  91 int vflag = 1;          /* for print-isakmp.c */
  92 static int dump_config = 0;     /* dump parsed config file. */
  93 static int exec_done = 0;       /* we've already been exec'd */
  94
  95 #ifdef TOP_PACKAGE
  96 static char version[] = "@(#)" TOP_PACKAGE_STRING " (" TOP_PACKAGE_URL ")";
  97 #else /* TOP_PACKAGE */
  98 static char version[] = "@(#) racoon / IPsec-tools";
  99 #endif /* TOP_PACKAGE */
 100
 101 int main (int, char **);
 102 static void usage (void);
 103 static void parse (int, char **);
 104 static void restore_params (void);
 105 static void save_params (void);
 106 static void saverestore_params (int);
 107 static void cleanup_pidfile (void);
 108 #if 0 // <rdar://problem/9286626>
 109 int launchedbylaunchd (void);
 110 #endif
 111
 112 pid_t racoon_pid = 0;
 113 int   launchdlaunched = 0;
 114 int print_pid = 1;      /* for racoon only */
 115
 116
 117 void
 118 usage()
 119 {
 120         printf("usage: racoon [-BdDFvs%s] %s[-f (file)] [-l (file)] [-p (port)]\n",
 121 #ifdef INET6
 122                 "46",
 123 #else
 124                 "",
 125 #endif
 126                 ""
 127                 );
 128         printf("   -d: debug level, more -d will generate more debug message.\n");
 129         printf("   -D: started by LaunchD (implies daemon mode).\n");
 130         printf("   -C: dump parsed config file.\n");
 131         printf("   -L: include location in debug messages\n");
 132         printf("   -F: run in foreground, do not become daemon.\n");
 133         printf("   -v: be more verbose\n");
 134         printf("   -s: override enable auto exit\n");
 135 #ifdef INET6
 136         printf("   -4: IPv4 mode.\n");
 137         printf("   -6: IPv6 mode.\n");
 138 #endif
 139         printf("   -f: pathname for configuration file.\n");
 140         printf("   -l: pathname for log file.\n");
 141         printf("   -p: port number for isakmp (default: %d).\n", PORT_ISAKMP);
 142         printf("   -P: port number for NAT-T (default: %d).\n", PORT_ISAKMP_NATT);
 143         exit(1);
 144 }
 145
 146 int
 147 main(ac, av)
 148         int ac;
 149         char **av;
 150 {
 151         int error;
 152
 153         /*
 154          * Check IPSec plist
 155          */
 156         prefsinit();
 157         ploginit();
 158
 159         /*
 160          * racoon is not sandboxed on Mac OS.
 161          * On embedded, racoon is sandboxed with a seatbelt-profiles entitlement.
 162          */
 163
 164         if (geteuid() != 0) {
 165                 errx(1, "must be root to invoke this program.");
 166                 /* NOTREACHED*/
 167         }
 168
 169         /*
 170          * Don't let anyone read files I write.  Although some files (such as
 171          * the PID file) can be other readable, we dare to use the global mask,
 172          * because racoon uses fopen(3), which can't specify the permission
 173          * at the creation time.
 174          */
 175         umask(077);
 176         if (umask(077) != 077) {
 177                 errx(1, "could not set umask");
 178                 /* NOTREACHED*/
 179         }
 180
 181 #ifdef HAVE_OPENSSL
 182         eay_init();
 183 #endif
 184
 185         initlcconf();
 186         initrmconf();
 187         oakley_dhinit();
 188         compute_vendorids();
 189
 190         parse(ac, av);
 191
 192         plog(ASL_LEVEL_INFO, "***** racoon started: pid=%d  started by: %d, launchdlaunched %d\n", getpid(), getppid(), launchdlaunched);
 193         plog(ASL_LEVEL_INFO, "%s\n", version);
 194 #ifdef HAVE_OPENSSL
 195         plog(ASL_LEVEL_INFO, "@(#)"
 196             "This product linked %s (http://www.openssl.org/)"
 197             "\n", eay_version());
 198 #endif
 199         plog(ASL_LEVEL_INFO, "Reading configuration from \"%s\"\n",
 200             lcconf->racoon_conf);
 201
 202     //%%%%% this sould probably be moved to session()
 203         if (pfkey_init() < 0) {
 204                 errx(1, "failed to initialize pfkey.\n");
 205                 /* NOTREACHED*/
 206         }
 207
 208         /*
 209          * in order to prefer the parameters by command line,
 210          * saving some parameters before parsing configuration file.
 211          */
 212         save_params();
 213         error = cfparse();
 214         if (error != 0)
 215                 errx(1, "failed to parse configuration file.");
 216         restore_params();
 217
 218         if (lcconf->logfile_param == NULL && logFileStr[0] == 0)
 219                 plogresetfile(lcconf->pathinfo[LC_PATHTYPE_LOGFILE]);
 220
 221 #ifdef ENABLE_NATT
 222         /* Tell the kernel which port to use for UDP encapsulation */
 223         {
 224                 int udp_port = PORT_ISAKMP_NATT;
 225                 if (sysctlbyname("net.inet.ipsec.esp_port", NULL, NULL, &udp_port, sizeof(udp_port)) != 0)
 226                         errx(1, "couldn't set net.inet.ipsec.esp_port to %d. (%s)",
 227                                 udp_port, strerror(errno));
 228         }
 229 #endif
 230
 231
 232 #ifdef ENABLE_HYBRID
 233         if(isakmp_cfg_config.network4 && isakmp_cfg_config.pool_size == 0)
 234                 if ((error = isakmp_cfg_resize_pool(ISAKMP_CFG_MAX_CNX)) != 0)
 235                         return error;
 236 #endif
 237
 238         if (dump_config)
 239                 dumprmconf ();
 240
 241         /*
 242          * install SAs from the specified file.  If the file is not specified
 243          * by the configuration file, racoon will exit.
 244          */
 245
 246         if (f_foreground)
 247                 close(0);
 248         else {
 249                 if ( !exec_done && launchdlaunched ){
 250                         plog(ASL_LEVEL_INFO,
 251                                  "racoon launched by launchd.\n");
 252                         exec_done = 1;
 253                         if (atexit(cleanup_pidfile) < 0) {
 254                                 plog(ASL_LEVEL_ERR,
 255                                          "cannot register pidfile cleanup");
 256                         }
 257                 }else {
 258
 259                         if (exec_done) {
 260                                 if (atexit(cleanup_pidfile) < 0) {
 261                                         plog(ASL_LEVEL_ERR,
 262                                                 "cannot register pidfile cleanup");
 263                                 }
 264                         } else {
 265                                 #define MAX_EXEC_ARGS 32
 266
 267                                 char *args[MAX_EXEC_ARGS + 2]; /* 2 extra, for '-x' and NULL */
 268                                 char *env[1] = {0};
 269                                 int     i;
 270
 271                                 if (ac > MAX_EXEC_ARGS) {
 272                                         plog(ASL_LEVEL_ERR,
 273                                                 "too many arguments.\n");
 274                                         exit(1);
 275                                 }
 276
 277                                 if (daemon(0, 0) < 0) {
 278                                         errx(1, "failed to be daemon. (%s)",
 279                                                 strerror(errno));
 280                                 }
 281
 282                                 /* Radar 5129006 - Prevent non-root user from killing racoon
 283                                  * when launched by setuid process
 284                                  */
 285                                 if (setuid(0)) {
 286                                         plog(ASL_LEVEL_ERR,
 287                                                 "cannot set uid.\n");
 288                                         exit(1);
 289                                 }
 290                                 if (setgid(0)) {
 291                                         plog(ASL_LEVEL_ERR,
 292                                                 "cannot set gid.\n");
 293                                         exit(1);
 294                                 }
 295
 296                                 /* setup args to re-exec - for CoreFoundation issues */
 297                                 args[0] = PATHRACOON;
 298                                 for (i = 1; i < ac; i++)
 299                                         args[i] = *(av + i);
 300                                 args[ac] = "-x";                /* tells racoon its been exec'd */
 301                                 args[ac+1] = 0;
 302
 303                                 execve(PATHRACOON, args, env);
 304                                 plog(ASL_LEVEL_ERR,
 305                                                 "failed to exec racoon. (%s)", strerror(errno));
 306                                 exit(1);
 307                         }
 308                 }
 309         }
 310
 311
 312     /* start the session */
 313         session();
 314 }
 315
 316 #if 0 // <rdar://problem/9286626>
 317 int
 318 launchedbylaunchd(){
 319         launch_data_t checkin_response = NULL;
 320
 321         if ((checkin_response = launch_socket_service_check_in()) == NULL) {
 322                 plog(LLV_ERROR, LOCATION, NULL,
 323                          "launch_socket_service_check_in fails.\n");
 324                 launchdlaunched = 0;
 325                 goto done;
 326         }
 327         if (LAUNCH_DATA_ERRNO == launch_data_get_type(checkin_response)) {
 328                 plog(LLV_ERROR, LOCATION, NULL,
 329                          "launch_data_get_type fails errno %d.\n", launch_data_get_errno(checkin_response));
 330                 launchdlaunched = 0;
 331                 goto done;
 332         }
 333         launchdlaunched = 1;
 334 done:
 335         /* clean up before we leave */
 336         if ( checkin_response )
 337                 launch_data_free(checkin_response);
 338         return launchdlaunched;
 339 }
 340 #endif
 341
 342 static void
 343 cleanup_pidfile()
 344 {
 345         char pid_file[MAXPATHLEN];
 346         pid_t p = getpid();
 347
 348         /* if it's not child process, clean everything */
 349         if (racoon_pid == p) {
 350                 if (lcconf->pathinfo[LC_PATHTYPE_PIDFILE] == NULL)
 351                         strlcpy(pid_file, _PATH_VARRUN "racoon.pid", sizeof(pid_file));
 352                 else if (lcconf->pathinfo[LC_PATHTYPE_PIDFILE][0] == '/')
 353                         strlcpy(pid_file, lcconf->pathinfo[LC_PATHTYPE_PIDFILE], sizeof(pid_file));
 354                 else {
 355                         strlcat(pid_file, _PATH_VARRUN, sizeof(pid_file));
 356                         strlcat(pid_file, lcconf->pathinfo[LC_PATHTYPE_PIDFILE], sizeof(pid_file));
 357                 }
 358                 (void) unlink(pid_file);
 359         }
 360 }
 361
 362
 363 static void
 364 parse(ac, av)
 365         int ac;
 366         char **av;
 367 {
 368         extern char *optarg;
 369         extern int optind;
 370         int c;
 371 #ifdef YYDEBUG
 372         extern int yydebug;
 373 #endif
 374
 375         pname = strrchr(*av, '/');
 376         if (pname)
 377                 pname++;
 378         else
 379                 pname = *av;
 380
 381         while ((c = getopt(ac, av, "dDLFp:P:a:f:l:vsZBCx"
 382 #ifdef YYDEBUG
 383                         "y"
 384 #endif
 385 #ifdef INET6
 386                         "46"
 387 #endif
 388                         )) != -1) {
 389                 switch (c) {
 390                 case 'd':
 391                         plogsetlevel(ASL_LEVEL_DEBUG);
 392                         break;
 393                 case 'D':
 394                         if (f_foreground) {
 395                                 fprintf(stderr, "-D and -F are mutually exclusive\n");
 396                                 exit(1);
 397                         }
 398                         launchdlaunched = 1;
 399                         break;
 400                 case 'L':
 401                         print_location = 1;
 402                         break;
 403                 case 'F':
 404                         if (launchdlaunched) {
 405                                 fprintf(stderr, "-D and -F are mutually exclusive\n");
 406                                 exit(1);
 407                         }
 408                         printf("Foreground mode.\n");
 409                         f_foreground = 1;
 410                         break;
 411                 case 'p':
 412                         lcconf->port_isakmp = atoi(optarg);
 413                         break;
 414                 case 'P':
 415                         lcconf->port_isakmp_natt = atoi(optarg);
 416                         break;
 417                 case 'a':
 418                         fprintf(stderr, "%s: the option is disabled "
 419                             "in the configuration\n", pname);
 420                         exit(1);
 421                 case 'f':
 422                         lcconf->racoon_conf = optarg;
 423                         break;
 424                 case 'l':
 425                         lcconf->logfile_param = optarg;
 426                         break;
 427                 case 'v':
 428                         vflag++;
 429                         break;
 430                 case 's':
 431                         lcconf->auto_exit_state &= ~LC_AUTOEXITSTATE_CLIENT;    /* override default auto exit state */
 432                         break;
 433                 case 'x':
 434                         exec_done = 1;
 435                         break;
 436                 case 'Z':
 437                         /*
 438                          * only local test.
 439                          * To specify -Z option and to choice a appropriate
 440                          * port number for ISAKMP, you can launch some racoons
 441                          * on the local host for debug.
 442                          * pk_sendadd() on initiator side is always failed
 443                          * even if this flag is used.  Because there is same
 444                          * spi in the SAD which is inserted by pk_sendgetspi()
 445                          * on responder side.
 446                          */
 447                         printf("Local test mode.\n");
 448                         f_local = 1;
 449                         break;
 450 #ifdef YYDEBUG
 451                 case 'y':
 452                         yydebug = 1;
 453                         break;
 454 #endif
 455 #ifdef INET6
 456                 case '4':
 457                         lcconf->default_af = AF_INET;
 458                         break;
 459                 case '6':
 460                         lcconf->default_af = AF_INET6;
 461                         break;
 462 #endif
 463                 case 'C':
 464                         dump_config++;
 465                         break;
 466                 default:
 467                         usage();
 468                         /* NOTREACHED */
 469                 }
 470         }
 471         ac -= optind;
 472         av += optind;
 473
 474         if (ac != 0) {
 475                 usage();
 476                 /* NOTREACHED */
 477         }
 478
 479         return;
 480 }
 481
 482 static void
 483 restore_params()
 484 {
 485         saverestore_params(1);
 486 }
 487
 488 static void
 489 save_params()
 490 {
 491         saverestore_params(0);
 492 }
 493
 494 static void
 495 saverestore_params(f)
 496         int f;
 497 {
 498         static u_int16_t s_port_isakmp;
 499
 500         /* 0: save, 1: restore */
 501         if (f) {
 502                 lcconf->port_isakmp = s_port_isakmp;
 503         } else {
 504                 s_port_isakmp = lcconf->port_isakmp;
 505         }
 506 }