release/src/router/nfs-utils/utils/gssd/gssd.c

   1 /*
   2   gssd.c
   3
   4   Copyright (c) 2000 The Regents of the University of Michigan.
   5   All rights reserved.
   6
   7   Copyright (c) 2000 Dug Song <dugsong@UMICH.EDU>.
   8   Copyright (c) 2002 Andy Adamson <andros@UMICH.EDU>.
   9   Copyright (c) 2002 Marius Aamodt Eriksen <marius@UMICH.EDU>.
  10   All rights reserved, all wrongs reversed.
  11
  12   Redistribution and use in source and binary forms, with or without
  13   modification, are permitted provided that the following conditions
  14   are met:
  15
  16   1. Redistributions of source code must retain the above copyright
  17      notice, this list of conditions and the following disclaimer.
  18   2. Redistributions in binary form must reproduce the above copyright
  19      notice, this list of conditions and the following disclaimer in the
  20      documentation and/or other materials provided with the distribution.
  21   3. Neither the name of the University nor the names of its
  22      contributors may be used to endorse or promote products derived
  23      from this software without specific prior written permission.
  24
  25   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26   WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27   MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28   DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32   BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36
  37 */
  38
  39 #ifdef HAVE_CONFIG_H
  40 #include <config.h>
  41 #endif  /* HAVE_CONFIG_H */
  42
  43 #include <sys/param.h>
  44 #include <sys/socket.h>
  45 #include <rpc/rpc.h>
  46
  47 #include <unistd.h>
  48 #include <err.h>
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #include <signal.h>
  53 #include "gssd.h"
  54 #include "err_util.h"
  55 #include "gss_util.h"
  56 #include "krb5_util.h"
  57
  58 char pipefs_dir[PATH_MAX] = GSSD_PIPEFS_DIR;
  59 char pipefs_nfsdir[PATH_MAX] = GSSD_PIPEFS_DIR;
  60 char keytabfile[PATH_MAX] = GSSD_DEFAULT_KEYTAB_FILE;
  61 char ccachedir[PATH_MAX] = GSSD_DEFAULT_CRED_DIR;
  62 char *ccachesearch[GSSD_MAX_CCACHE_SEARCH + 1];
  63 int  use_memcache = 0;
  64 int  root_uses_machine_creds = 1;
  65 unsigned int  context_timeout = 0;
  66 char *preferred_realm = NULL;
  67
  68 void
  69 sig_die(int signal)
  70 {
  71         /* destroy krb5 machine creds */
  72         if (root_uses_machine_creds)
  73                 gssd_destroy_krb5_machine_creds();
  74         printerr(1, "exiting on signal %d\n", signal);
  75         exit(1);
  76 }
  77
  78 void
  79 sig_hup(int signal)
  80 {
  81         /* don't exit on SIGHUP */
  82         printerr(1, "Received SIGHUP... Ignoring.\n");
  83         return;
  84 }
  85
  86 static void
  87 usage(char *progname)
  88 {
  89         fprintf(stderr, "usage: %s [-f] [-M] [-n] [-v] [-r] [-p pipefsdir] [-k keytab] [-d ccachedir] [-t timeout] [-R preferred realm]\n",
  90                 progname);
  91         exit(1);
  92 }
  93
  94 int
  95 main(int argc, char *argv[])
  96 {
  97         int fg = 0;
  98         int verbosity = 0;
  99         int rpc_verbosity = 0;
 100         int opt;
 101         int i;
 102         extern char *optarg;
 103         char *progname;
 104
 105         memset(ccachesearch, 0, sizeof(ccachesearch));
 106         while ((opt = getopt(argc, argv, "fvrmnMp:k:d:t:R:")) != -1) {
 107                 switch (opt) {
 108                         case 'f':
 109                                 fg = 1;
 110                                 break;
 111                         case 'm':
 112                                 /* Accept but ignore this. Now the default. */
 113                                 break;
 114                         case 'M':
 115                                 use_memcache = 1;
 116                                 break;
 117                         case 'n':
 118                                 root_uses_machine_creds = 0;
 119                                 break;
 120                         case 'v':
 121                                 verbosity++;
 122                                 break;
 123                         case 'r':
 124                                 rpc_verbosity++;
 125                                 break;
 126                         case 'p':
 127                                 strncpy(pipefs_dir, optarg, sizeof(pipefs_dir));
 128                                 if (pipefs_dir[sizeof(pipefs_dir)-1] != '\0')
 129                                         errx(1, "pipefs path name too long");
 130                                 break;
 131                         case 'k':
 132                                 strncpy(keytabfile, optarg, sizeof(keytabfile));
 133                                 if (keytabfile[sizeof(keytabfile)-1] != '\0')
 134                                         errx(1, "keytab path name too long");
 135                                 break;
 136                         case 'd':
 137                                 strncpy(ccachedir, optarg, sizeof(ccachedir));
 138                                 if (ccachedir[sizeof(ccachedir)-1] != '\0')
 139                                         errx(1, "ccachedir path name too long");
 140                                 break;
 141                         case 't':
 142                                 context_timeout = atoi(optarg);
 143                                 break;
 144                         case 'R':
 145                                 preferred_realm = strdup(optarg);
 146                                 break;
 147                         default:
 148                                 usage(argv[0]);
 149                                 break;
 150                 }
 151         }
 152
 153         i = 0;
 154         ccachesearch[i++] = strtok(ccachedir, ":");
 155         do {
 156                 ccachesearch[i++] = strtok(NULL, ":");
 157         } while (ccachesearch[i-1] != NULL && i < GSSD_MAX_CCACHE_SEARCH);
 158
 159         if (preferred_realm == NULL)
 160                 gssd_k5_get_default_realm(&preferred_realm);
 161
 162         snprintf(pipefs_nfsdir, sizeof(pipefs_nfsdir), "%s/%s",
 163                  pipefs_dir, GSSD_SERVICE_NAME);
 164         if (pipefs_nfsdir[sizeof(pipefs_nfsdir)-1] != '\0')
 165                 errx(1, "pipefs_nfsdir path name too long");
 166
 167         if ((progname = strrchr(argv[0], '/')))
 168                 progname++;
 169         else
 170                 progname = argv[0];
 171
 172         initerr(progname, verbosity, fg);
 173 #ifdef HAVE_AUTHGSS_SET_DEBUG_LEVEL
 174         authgss_set_debug_level(rpc_verbosity);
 175 #else
 176         if (rpc_verbosity > 0)
 177                 printerr(0, "Warning: rpcsec_gss library does not "
 178                             "support setting debug level\n");
 179 #endif
 180
 181         if (gssd_check_mechs() != 0)
 182                 errx(1, "Problem with gssapi library");
 183
 184         if (!fg && daemon(0, 0) < 0)
 185                 errx(1, "fork");
 186
 187         signal(SIGINT, sig_die);
 188         signal(SIGTERM, sig_die);
 189         signal(SIGHUP, sig_hup);
 190
 191         gssd_run();
 192         printerr(0, "gssd_run returned!\n");
 193         abort();
 194 }