plugins/check_radius.c

   1 /*****************************************************************************
   2 *
   3 * Nagios check_radius plugin
   4 *
   5 * License: GPL
   6 * Copyright (c) 1999-2008 Nagios Plugins Development Team
   7 *
   8 * Last Modified: $Date$
   9 *
  10 * Description:
  11 *
  12 * This file contains the check_radius plugin
  13 *
  14 * Tests to see if a radius server is accepting connections.
  15 *
  16 *
  17 * This program is free software: you can redistribute it and/or modify
  18 * it under the terms of the GNU General Public License as published by
  19 * the Free Software Foundation, either version 3 of the License, or
  20 * (at your option) any later version.
  21 *
  22 * This program is distributed in the hope that it will be useful,
  23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25 * GNU General Public License for more details.
  26 *
  27 * You should have received a copy of the GNU General Public License
  28 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  29 *
  30 * $Id$
  31 *
  32 *****************************************************************************/
  33
  34 const char *progname = "check_radius";
  35 const char *revision = "$Revision$";
  36 const char *copyright = "2000-2008";
  37 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  38
  39 #include "common.h"
  40 #include "utils.h"
  41 #include "netutils.h"
  42
  43 #ifdef HAVE_LIBRADIUSCLIENT_NG
  44 #include <radiusclient-ng.h>
  45 rc_handle *rch = NULL;
  46 #else
  47 #include <radiusclient.h>
  48 #endif
  49
  50 int process_arguments (int, char **);
  51 void print_help (void);
  52 void print_usage (void);
  53
  54 /* libradiusclient(-ng) wrapper functions */
  55 #ifdef HAVE_LIBRADIUSCLIENT_NG
  56 #define my_rc_conf_str(a) rc_conf_str(rch,a)
  57 #define my_rc_send_server(a,b) rc_send_server(rch,a,b)
  58 #define my_rc_buildreq(a,b,c,d,e,f) rc_buildreq(rch,a,b,c,d,e,f)
  59 #define my_rc_own_ipaddress() rc_own_ipaddress(rch)
  60 #define my_rc_avpair_add(a,b,c,d) rc_avpair_add(rch,a,b,c,-1,d)
  61 #define my_rc_read_dictionary(a) rc_read_dictionary(rch, a)
  62 #else
  63 #define my_rc_conf_str(a) rc_conf_str(a)
  64 #define my_rc_send_server(a,b) rc_send_server(a, b)
  65 #define my_rc_buildreq(a,b,c,d,e,f) rc_buildreq(a,b,c,d,e,f)
  66 #define my_rc_own_ipaddress() rc_own_ipaddress()
  67 #define my_rc_avpair_add(a,b,c,d) rc_avpair_add(a, b, c, d)
  68 #define my_rc_read_dictionary(a) rc_read_dictionary(a)
  69 #endif
  70 int my_rc_read_config(char *);
  71
  72 char *server = NULL;
  73 char *username = NULL;
  74 char *password = NULL;
  75 char *nasid = NULL;
  76 char *expect = NULL;
  77 char *config_file = NULL;
  78 unsigned short port = PW_AUTH_UDP_PORT;
  79 int retries = 1;
  80 int verbose = FALSE;
  81 ENV *env = NULL;
  82
  83 /******************************************************************************
  84
  85 The (psuedo?)literate programming XML is contained within \@\@\- <XML> \-\@\@
  86 tags in the comments. With in the tags, the XML is assembled sequentially.
  87 You can define entities in tags. You also have all the #defines available as
  88 entities.
  89
  90 Please note that all tags must be lowercase to use the DocBook XML DTD.
  91
  92 @@-<article>
  93
  94 <sect1>
  95 <title>Quick Reference</title>
  96 <!-- The refentry forms a manpage -->
  97 <refentry>
  98 <refmeta>
  99 <manvolnum>5<manvolnum>
 100 </refmeta>
 101 <refnamdiv>
 102 <refname>&progname;</refname>
 103 <refpurpose>&SUMMARY;</refpurpose>
 104 </refnamdiv>
 105 </refentry>
 106 </sect1>
 107
 108 <sect1>
 109 <title>FAQ</title>
 110 </sect1>
 111
 112 <sect1>
 113 <title>Theory, Installation, and Operation</title>
 114
 115 <sect2>
 116 <title>General Description</title>
 117 <para>
 118 &DESCRIPTION;
 119 </para>
 120 </sect2>
 121
 122 <sect2>
 123 <title>Future Enhancements</title>
 124 <para>Todo List</para>
 125 <itemizedlist>
 126 <listitem>Add option to get password from a secured file rather than the command line</listitem>
 127 </itemizedlist>
 128 </sect2>
 129
 130
 131 <sect2>
 132 <title>Functions</title>
 133 -@@
 134 ******************************************************************************/
 135
 136
 137
 138 int
 139 main (int argc, char **argv)
 140 {
 141         UINT4 service;
 142         char msg[BUFFER_LEN];
 143         SEND_DATA data;
 144         int result = STATE_UNKNOWN;
 145         UINT4 client_id;
 146         char *str;
 147
 148         setlocale (LC_ALL, "");
 149         bindtextdomain (PACKAGE, LOCALEDIR);
 150         textdomain (PACKAGE);
 151
 152         /* Parse extra opts if any */
 153         argv=np_extra_opts (&argc, argv, progname);
 154
 155         if (process_arguments (argc, argv) == ERROR)
 156                 usage4 (_("Could not parse arguments"));
 157
 158         str = strdup ("dictionary");
 159         if ((config_file && my_rc_read_config (config_file)) ||
 160                         my_rc_read_dictionary (my_rc_conf_str (str)))
 161                 die (STATE_UNKNOWN, _("Config file error"));
 162
 163         service = PW_AUTHENTICATE_ONLY;
 164
 165         memset (&data, 0, sizeof(data));
 166         if (!(my_rc_avpair_add (&data.send_pairs, PW_SERVICE_TYPE, &service, 0) &&
 167                                 my_rc_avpair_add (&data.send_pairs, PW_USER_NAME, username, 0) &&
 168                                 my_rc_avpair_add (&data.send_pairs, PW_USER_PASSWORD, password, 0) &&
 169                                 (nasid==NULL || my_rc_avpair_add (&data.send_pairs, PW_NAS_IDENTIFIER, nasid, 0))))
 170                 die (STATE_UNKNOWN, _("Out of Memory?"));
 171
 172         /*
 173          * Fill in NAS-IP-Address
 174          */
 175
 176         if ((client_id = my_rc_own_ipaddress ()) == 0)
 177                 return (ERROR_RC);
 178
 179         if (my_rc_avpair_add (&(data.send_pairs), PW_NAS_IP_ADDRESS, &client_id, 0) ==
 180                         NULL) return (ERROR_RC);
 181
 182         my_rc_buildreq (&data, PW_ACCESS_REQUEST, server, port, (int)timeout_interval,
 183                      retries);
 184
 185         result = my_rc_send_server (&data, msg);
 186         rc_avpair_free (data.send_pairs);
 187         if (data.receive_pairs)
 188                 rc_avpair_free (data.receive_pairs);
 189
 190         if (result == TIMEOUT_RC)
 191                 die (STATE_CRITICAL, _("Timeout"));
 192         if (result == ERROR_RC)
 193                 die (STATE_CRITICAL, _("Auth Error"));
 194         if (result == BADRESP_RC)
 195                 die (STATE_WARNING, _("Auth Failed"));
 196         if (expect && !strstr (msg, expect))
 197                 die (STATE_WARNING, "%s", msg);
 198         if (result == OK_RC)
 199                 die (STATE_OK, _("Auth OK"));
 200         return (0);
 201 }
 202
 203
 204
 205 /* process command-line arguments */
 206 int
 207 process_arguments (int argc, char **argv)
 208 {
 209         int c;
 210
 211         int option = 0;
 212         static struct option longopts[] = {
 213                 {"hostname", required_argument, 0, 'H'},
 214                 {"port", required_argument, 0, 'P'},
 215                 {"username", required_argument, 0, 'u'},
 216                 {"password", required_argument, 0, 'p'},
 217                 {"nas-id", required_argument, 0, 'n'},
 218                 {"filename", required_argument, 0, 'F'},
 219                 {"expect", required_argument, 0, 'e'},
 220                 {"retries", required_argument, 0, 'r'},
 221                 {"timeout", required_argument, 0, 't'},
 222                 {"verbose", no_argument, 0, 'v'},
 223                 {"version", no_argument, 0, 'V'},
 224                 {"help", no_argument, 0, 'h'},
 225                 {0, 0, 0, 0}
 226         };
 227
 228         while (1) {
 229                 c = getopt_long (argc, argv, "+hVvH:P:F:u:p:n:t:r:e:", longopts,
 230                                                                          &option);
 231
 232                 if (c == -1 || c == EOF || c == 1)
 233                         break;
 234
 235                 switch (c) {
 236                 case '?':                                                                       /* print short usage statement if args not parsable */
 237                         usage5 ();
 238                 case 'h':                                                                       /* help */
 239                         print_help ();
 240                         exit (OK);
 241                 case 'V':                                                                       /* version */
 242                         print_revision (progname, revision);
 243                         exit (OK);
 244                 case 'v':                                                                       /* verbose mode */
 245                         verbose = TRUE;
 246                         break;
 247                 case 'H':                                                                       /* hostname */
 248                         if (is_host (optarg) == FALSE) {
 249                                 usage2 (_("Invalid hostname/address"), optarg);
 250                         }
 251                         server = optarg;
 252                         break;
 253                 case 'P':                                                                       /* port */
 254                         if (is_intnonneg (optarg))
 255                                 port = atoi (optarg);
 256                         else
 257                                 usage4 (_("Port must be a positive integer"));
 258                         break;
 259                 case 'u':                                                                       /* username */
 260                         username = optarg;
 261                         break;
 262                 case 'p':                                                                       /* password */
 263                         password = strdup(optarg);
 264
 265                         /* Delete the password from process list */
 266                         while (*optarg != '\0') {
 267                                 *optarg = 'X';
 268                                 optarg++;
 269                         }
 270                         break;
 271                 case 'n':                                                                       /* nas id */
 272                         nasid = optarg;
 273                         break;
 274                 case 'F':                                                                       /* configuration file */
 275                         config_file = optarg;
 276                         break;
 277                 case 'e':                                                                       /* expect */
 278                         expect = optarg;
 279                         break;
 280                 case 'r':                                                                       /* retries */
 281                         if (is_intpos (optarg))
 282                                 retries = atoi (optarg);
 283                         else
 284                                 usage4 (_("Number of retries must be a positive integer"));
 285                         break;
 286                 case 't':                                                                       /* timeout */
 287                         if (is_intpos (optarg))
 288                                 timeout_interval = atoi (optarg);
 289                         else
 290                                 usage2 (_("Timeout interval must be a positive integer"), optarg);
 291                         break;
 292                 }
 293         }
 294
 295         if (server == NULL)
 296                 usage4 (_("Hostname was not supplied"));
 297         if (username == NULL)
 298                 usage4 (_("User not specified"));
 299         if (password == NULL)
 300                 usage4 (_("Password not specified"));
 301         if (config_file == NULL)
 302                 usage4 (_("Configuration file not specified"));
 303
 304         return OK;
 305 }
 306
 307
 308
 309 void
 310 print_help (void)
 311 {
 312         char *myport;
 313         asprintf (&myport, "%d", PW_AUTH_UDP_PORT);
 314
 315         print_revision (progname, revision);
 316
 317         printf ("Copyright (c) 1999 Robert August Vincent II\n");
 318         printf (COPYRIGHT, copyright, email);
 319
 320         printf("%s\n", _("Tests to see if a radius server is accepting connections."));
 321
 322   printf ("\n\n");
 323
 324         print_usage ();
 325
 326         printf (_(UT_HELP_VRSN));
 327         printf (_(UT_EXTRA_OPTS));
 328
 329         printf (_(UT_HOST_PORT), 'P', myport);
 330
 331         printf (" %s\n", "-u, --username=STRING");
 332   printf ("    %s\n", _("The user to authenticate"));
 333   printf (" %s\n", "-p, --password=STRING");
 334   printf ("    %s\n", _("Password for autentication (SECURITY RISK)"));
 335   printf (" %s\n", "-n, --nas-id=STRING");
 336   printf ("    %s\n", _("NAS identifier"));
 337   printf (" %s\n", "-F, --filename=STRING");
 338   printf ("    %s\n", _("Configuration file"));
 339   printf (" %s\n", "-e, --expect=STRING");
 340   printf ("    %s\n", _("Response string to expect from the server"));
 341   printf (" %s\n", "-r, --retries=INTEGER");
 342   printf ("    %s\n", _("Number of times to retry a failed connection"));
 343
 344         printf (_(UT_TIMEOUT), timeout_interval);
 345
 346   printf ("\n");
 347   printf ("%s\n", _("This plugin tests a radius server to see if it is accepting connections."));
 348   printf ("%s\n", _("The server to test must be specified in the invocation, as well as a user"));
 349   printf ("%s\n", _("name and password. A configuration file may also be present. The format of"));
 350   printf ("%s\n", _("the configuration file is described in the radiusclient library sources."));
 351         printf ("%s\n", _("The password option presents a substantial security issue because the"));
 352   printf ("%s\n", _("password can possibly be determined by careful watching of the command line"));
 353   printf ("%s\n", _("in a process listing. This risk is exacerbated because nagios will"));
 354   printf ("%s\n", _("run the plugin at regular predictable intervals. Please be sure that"));
 355   printf ("%s\n", _("the password used does not allow access to sensitive system resources."));
 356
 357 #ifdef NP_EXTRA_OPTS
 358   printf ("\n");
 359   printf ("%s\n", _("Notes:"));
 360   printf (_(UT_EXTRA_OPTS_NOTES));
 361 #endif
 362
 363         printf (_(UT_SUPPORT));
 364 }
 365
 366
 367
 368 void
 369 print_usage (void)
 370 {
 371   printf (_("Usage:"));
 372         printf ("%s -H host -F config_file -u username -p password [-n nas-id] [-P port]\n\
 373                   [-t timeout] [-r retries] [-e expect]\n", progname);
 374 }
 375
 376
 377
 378 int my_rc_read_config(char * a)
 379 {
 380 #ifdef HAVE_LIBRADIUSCLIENT_NG
 381         rch = rc_read_config(a);
 382         return (rch == NULL) ? 1 : 0;
 383 #else
 384         return rc_read_config(a);
 385 #endif
 386 }