2 * rlm_sim_files.c authorization: Find a SIM user in the "simtriplets"
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * Copyright 2004 Michael Richardson <mcr@sandelman.ottawa.on.ca>
23 * (Adapted from rlm_files/rlm_files.c )
27 * this is an authorization-only module that walks the file every time.
29 * this is an example of getting data for rlm_eap_sim from an external
32 * in a real system, this would be replaced with a lookup to the SS7
33 * network, but those interfaces are distinctly non-standard, and might
34 * even be totally proprietary
41 * The triplets file contains records of the form:
44 * 232420100000015,30000000000000000000000000000000,30112233,445566778899AABB
46 * there must be *three* entries for every IMSI for it to be considered valid.
48 * Lines starting with # are ignored.
50 * Conveniently, this file format is produced by XXXX.
56 static const char rcsid[] = "$Id$";
59 #include "libradius.h"
72 #include "../rlm_eap/libeap/eap_sim.h"
74 struct sim_file_instance {
79 static const CONF_PARSER module_config[] = {
80 { "simtriplets", PW_TYPE_STRING_PTR,
81 offsetof(struct sim_file_instance, file),
82 NULL, "${raddbdir}/simtriplets.dat" },
84 { NULL, -1, 0, NULL, NULL }
88 * (Re-)read the "users" file into memory.
90 static int sim_file_instantiate(CONF_SECTION *conf, void **instance)
92 struct sim_file_instance *inst;
94 inst = rad_malloc(sizeof *inst);
98 memset(inst, 0, sizeof(*inst));
100 if (cf_section_parse(conf, inst, module_config) < 0) {
110 * Find the named user in the database. Create the
111 * set of attribute-value pairs to check and reply with
112 * for this user from the database. The main code only
113 * needs to check the password, the rest is done here.
115 static int sim_file_authorize(void *instance, REQUEST *request)
117 VALUE_PAIR *namepair;
118 VALUE_PAIR *reply_tmp;
120 struct sim_file_instance *inst = instance;
121 VALUE_PAIR **reply_pairs;
122 VALUE_PAIR **config_pairs;
124 char tripbuf[sizeof("232420100000015,30000000000000000000000000000000,30112233,445566778899AABB")*2];
125 char imsi[128], chal[256], kc[128], sres[128];
130 reply_pairs = &request->reply->vps;
131 config_pairs = &request->config_items;
134 * Grab the canonical user name.
136 namepair = request->username;
137 name = namepair ? (char *) namepair->strvalue : "NONE";
139 triplets = fopen(inst->file, "r");
141 if(triplets == NULL) {
142 radlog(L_ERR, "can not open %s: %s",
143 inst->file, strerror(errno));
144 return RLM_MODULE_NOTFOUND;
150 while(fgets(tripbuf, sizeof(tripbuf), triplets) == tripbuf
155 VALUE_PAIR *r, *k, *s;
158 if(tripbuf[0]=='#') continue;
162 chal[0]='0'; chal[1]='x';
163 kc[0]='0'; kc[1]='x';
164 sres[0]='0'; sres[1]='x';
170 strncat(imsi, f, sizeof(imsi));
174 if(strcmp(imsi, name) != 0)
184 strncat(chal+2, f, sizeof(chal)-2);
192 strncat(sres+2, f, sizeof(sres)-2);
196 f = strsep(&l, ",\n");
200 strncat(kc+2, f, sizeof(kc)-2);
206 radlog(L_ERR, "invalid number of fields %d at line %d",
208 /* complain about malformed line */
213 r = paircreate(ATTRIBUTE_EAP_SIM_RAND1 + imsicount, PW_TYPE_OCTETS);
214 r = pairparsevalue(r, chal);
215 pairadd(reply_pairs, r);
217 k = paircreate(ATTRIBUTE_EAP_SIM_KC1 + imsicount, PW_TYPE_OCTETS);
218 k = pairparsevalue(k, kc);
219 rad_assert(k != NULL);
220 pairadd(reply_pairs, k);
222 s = paircreate(ATTRIBUTE_EAP_SIM_SRES1 + imsicount, PW_TYPE_OCTETS);
223 s = pairparsevalue(s, sres);
224 pairadd(reply_pairs, s);
232 DEBUG("rlm_sim_files: "
233 "insufficient number of challenges for imsi %s: %d\n",
235 return RLM_MODULE_NOTFOUND;
238 DEBUG("rlm_sim_files: "
239 "authorized user/imsi %s\n", name);
242 * EAP module will also grab based upon presence of EAP packet
243 * and it will add the Autz-Type entry.
246 if((reply_tmp = pairmake ("EAP-Type", "SIM", T_OP_EQ)))
248 radlog(L_INFO, "rlm_sim_files: Adding EAP-Type: eap-sim");
249 pairadd (config_pairs, reply_tmp);
253 DEBUG("rlm_sim_files: saw config");
254 vp_printlist(stdout, *config_pairs);
256 DEBUG("rlm_sim_files: saw reply");
257 vp_printlist(stdout, *reply_pairs);
260 return RLM_MODULE_OK;
267 static int sim_file_detach(void *instance)
269 struct sim_file_instance *inst = instance;
276 /* globally exported name */
277 module_t rlm_sim_files = {
279 0, /* type: reserved */
280 NULL, /* initialization */
281 sim_file_instantiate, /* instantiation */
283 NULL, /* authentication */
284 sim_file_authorize, /* authorization */
285 NULL, /* preaccounting */
286 NULL, /* accounting */
287 NULL, /* checksimul */
288 NULL, /* pre-proxy */
289 NULL, /* post-proxy */
292 sim_file_detach, /* detach */