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6fc6879b JM |
1 | /* |
2 | * hostapd / EAP-SIM database/authenticator gateway | |
762e4ce6 | 3 | * Copyright (c) 2005-2010, 2012, Jouni Malinen <j@w1.fi> |
6fc6879b | 4 | * |
0f3d578e JM |
5 | * This software may be distributed under the terms of the BSD license. |
6 | * See README for more details. | |
6fc6879b JM |
7 | * |
8 | * This is an example implementation of the EAP-SIM/AKA database/authentication | |
9 | * gateway interface that is using an external program as an SS7 gateway to | |
10 | * GSM/UMTS authentication center (HLR/AuC). hlr_auc_gw is an example | |
11 | * implementation of such a gateway program. This eap_sim_db.c takes care of | |
12 | * EAP-SIM/AKA pseudonyms and re-auth identities. It can be used with different | |
13 | * gateway implementations for HLR/AuC access. Alternatively, it can also be | |
14 | * completely replaced if the in-memory database of pseudonyms/re-auth | |
15 | * identities is not suitable for some cases. | |
16 | */ | |
17 | ||
18 | #include "includes.h" | |
19 | #include <sys/un.h> | |
66979bb8 JM |
20 | #ifdef CONFIG_SQLITE |
21 | #include <sqlite3.h> | |
22 | #endif /* CONFIG_SQLITE */ | |
6fc6879b JM |
23 | |
24 | #include "common.h" | |
3642c431 | 25 | #include "crypto/random.h" |
6fc6879b JM |
26 | #include "eap_common/eap_sim_common.h" |
27 | #include "eap_server/eap_sim_db.h" | |
28 | #include "eloop.h" | |
29 | ||
30 | struct eap_sim_pseudonym { | |
31 | struct eap_sim_pseudonym *next; | |
61e181db JM |
32 | char *permanent; /* permanent username */ |
33 | char *pseudonym; /* pseudonym username */ | |
6fc6879b JM |
34 | }; |
35 | ||
36 | struct eap_sim_db_pending { | |
37 | struct eap_sim_db_pending *next; | |
61e181db | 38 | char imsi[20]; |
6fc6879b JM |
39 | enum { PENDING, SUCCESS, FAILURE } state; |
40 | void *cb_session_ctx; | |
6fc6879b JM |
41 | int aka; |
42 | union { | |
43 | struct { | |
44 | u8 kc[EAP_SIM_MAX_CHAL][EAP_SIM_KC_LEN]; | |
45 | u8 sres[EAP_SIM_MAX_CHAL][EAP_SIM_SRES_LEN]; | |
46 | u8 rand[EAP_SIM_MAX_CHAL][GSM_RAND_LEN]; | |
47 | int num_chal; | |
48 | } sim; | |
49 | struct { | |
50 | u8 rand[EAP_AKA_RAND_LEN]; | |
51 | u8 autn[EAP_AKA_AUTN_LEN]; | |
52 | u8 ik[EAP_AKA_IK_LEN]; | |
53 | u8 ck[EAP_AKA_CK_LEN]; | |
54 | u8 res[EAP_AKA_RES_MAX_LEN]; | |
55 | size_t res_len; | |
56 | } aka; | |
57 | } u; | |
58 | }; | |
59 | ||
60 | struct eap_sim_db_data { | |
61 | int sock; | |
62 | char *fname; | |
63 | char *local_sock; | |
64 | void (*get_complete_cb)(void *ctx, void *session_ctx); | |
65 | void *ctx; | |
66 | struct eap_sim_pseudonym *pseudonyms; | |
67 | struct eap_sim_reauth *reauths; | |
68 | struct eap_sim_db_pending *pending; | |
66979bb8 JM |
69 | #ifdef CONFIG_SQLITE |
70 | sqlite3 *sqlite_db; | |
61e181db | 71 | char db_tmp_identity[100]; |
66979bb8 JM |
72 | char db_tmp_pseudonym_str[100]; |
73 | struct eap_sim_pseudonym db_tmp_pseudonym; | |
29813cfd | 74 | struct eap_sim_reauth db_tmp_reauth; |
66979bb8 | 75 | #endif /* CONFIG_SQLITE */ |
6fc6879b JM |
76 | }; |
77 | ||
78 | ||
66979bb8 JM |
79 | #ifdef CONFIG_SQLITE |
80 | ||
81 | static int db_table_exists(sqlite3 *db, const char *name) | |
82 | { | |
83 | char cmd[128]; | |
84 | os_snprintf(cmd, sizeof(cmd), "SELECT 1 FROM %s;", name); | |
85 | return sqlite3_exec(db, cmd, NULL, NULL, NULL) == SQLITE_OK; | |
86 | } | |
87 | ||
88 | ||
89 | static int db_table_create_pseudonym(sqlite3 *db) | |
90 | { | |
91 | char *err = NULL; | |
92 | const char *sql = | |
93 | "CREATE TABLE pseudonyms(" | |
6d49d9ec | 94 | " permanent CHAR(21) PRIMARY KEY," |
66979bb8 JM |
95 | " pseudonym CHAR(21) NOT NULL" |
96 | ");"; | |
97 | ||
98 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Adding database table for " | |
99 | "pseudonym information"); | |
100 | if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) { | |
101 | wpa_printf(MSG_ERROR, "EAP-SIM DB: SQLite error: %s", err); | |
102 | sqlite3_free(err); | |
103 | return -1; | |
104 | } | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
109 | ||
29813cfd JM |
110 | static int db_table_create_reauth(sqlite3 *db) |
111 | { | |
112 | char *err = NULL; | |
113 | const char *sql = | |
114 | "CREATE TABLE reauth(" | |
6d49d9ec | 115 | " permanent CHAR(21) PRIMARY KEY," |
29813cfd JM |
116 | " reauth_id CHAR(21) NOT NULL," |
117 | " counter INTEGER," | |
29813cfd JM |
118 | " mk CHAR(40)," |
119 | " k_encr CHAR(32)," | |
120 | " k_aut CHAR(64)," | |
121 | " k_re CHAR(64)" | |
122 | ");"; | |
123 | ||
124 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Adding database table for " | |
125 | "reauth information"); | |
126 | if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) { | |
127 | wpa_printf(MSG_ERROR, "EAP-SIM DB: SQLite error: %s", err); | |
128 | sqlite3_free(err); | |
129 | return -1; | |
130 | } | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | ||
66979bb8 JM |
136 | static sqlite3 * db_open(const char *db_file) |
137 | { | |
138 | sqlite3 *db; | |
139 | ||
140 | if (sqlite3_open(db_file, &db)) { | |
141 | wpa_printf(MSG_ERROR, "EAP-SIM DB: Failed to open database " | |
142 | "%s: %s", db_file, sqlite3_errmsg(db)); | |
143 | sqlite3_close(db); | |
144 | return NULL; | |
145 | } | |
146 | ||
147 | if (!db_table_exists(db, "pseudonyms") && | |
148 | db_table_create_pseudonym(db) < 0) { | |
149 | sqlite3_close(db); | |
150 | return NULL; | |
151 | } | |
152 | ||
29813cfd JM |
153 | if (!db_table_exists(db, "reauth") && |
154 | db_table_create_reauth(db) < 0) { | |
155 | sqlite3_close(db); | |
156 | return NULL; | |
157 | } | |
158 | ||
66979bb8 JM |
159 | return db; |
160 | } | |
161 | ||
162 | ||
3961dffc | 163 | static int valid_db_string(const char *str) |
66979bb8 | 164 | { |
3961dffc | 165 | const char *pos = str; |
66979bb8 JM |
166 | while (*pos) { |
167 | if ((*pos < '0' || *pos > '9') && | |
168 | (*pos < 'a' || *pos > 'f')) | |
169 | return 0; | |
170 | pos++; | |
171 | } | |
172 | return 1; | |
173 | } | |
174 | ||
175 | ||
61e181db JM |
176 | static int db_add_pseudonym(struct eap_sim_db_data *data, |
177 | const char *permanent, char *pseudonym) | |
66979bb8 JM |
178 | { |
179 | char cmd[128]; | |
29813cfd | 180 | char *err = NULL; |
66979bb8 | 181 | |
6d49d9ec | 182 | if (!valid_db_string(permanent) || !valid_db_string(pseudonym)) { |
66979bb8 JM |
183 | os_free(pseudonym); |
184 | return -1; | |
185 | } | |
66979bb8 JM |
186 | |
187 | os_snprintf(cmd, sizeof(cmd), "INSERT OR REPLACE INTO pseudonyms " | |
6d49d9ec JM |
188 | "(permanent, pseudonym) VALUES ('%s', '%s');", |
189 | permanent, pseudonym); | |
66979bb8 | 190 | os_free(pseudonym); |
29813cfd JM |
191 | if (sqlite3_exec(data->sqlite_db, cmd, NULL, NULL, &err) != SQLITE_OK) |
192 | { | |
193 | wpa_printf(MSG_ERROR, "EAP-SIM DB: SQLite error: %s", err); | |
194 | sqlite3_free(err); | |
66979bb8 | 195 | return -1; |
29813cfd | 196 | } |
66979bb8 JM |
197 | |
198 | return 0; | |
199 | } | |
200 | ||
201 | ||
202 | static int get_pseudonym_cb(void *ctx, int argc, char *argv[], char *col[]) | |
203 | { | |
204 | struct eap_sim_db_data *data = ctx; | |
205 | int i; | |
66979bb8 JM |
206 | |
207 | for (i = 0; i < argc; i++) { | |
6d49d9ec | 208 | if (os_strcmp(col[i], "permanent") == 0 && argv[i]) { |
61e181db JM |
209 | os_strlcpy(data->db_tmp_identity, argv[i], |
210 | sizeof(data->db_tmp_identity)); | |
66979bb8 JM |
211 | } |
212 | } | |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
217 | ||
e95ffe04 | 218 | static char * |
66979bb8 JM |
219 | db_get_pseudonym(struct eap_sim_db_data *data, const char *pseudonym) |
220 | { | |
221 | char cmd[128]; | |
222 | ||
3961dffc | 223 | if (!valid_db_string(pseudonym)) |
66979bb8 | 224 | return NULL; |
e95ffe04 | 225 | os_memset(&data->db_tmp_identity, 0, sizeof(data->db_tmp_identity)); |
66979bb8 | 226 | os_snprintf(cmd, sizeof(cmd), |
6d49d9ec | 227 | "SELECT permanent FROM pseudonyms WHERE pseudonym='%s';", |
66979bb8 JM |
228 | pseudonym); |
229 | if (sqlite3_exec(data->sqlite_db, cmd, get_pseudonym_cb, data, NULL) != | |
230 | SQLITE_OK) | |
231 | return NULL; | |
e95ffe04 | 232 | if (data->db_tmp_identity[0] == '\0') |
66979bb8 | 233 | return NULL; |
e95ffe04 | 234 | return data->db_tmp_identity; |
66979bb8 JM |
235 | } |
236 | ||
237 | ||
61e181db JM |
238 | static int db_add_reauth(struct eap_sim_db_data *data, const char *permanent, |
239 | char *reauth_id, u16 counter, const u8 *mk, | |
240 | const u8 *k_encr, const u8 *k_aut, const u8 *k_re) | |
29813cfd JM |
241 | { |
242 | char cmd[2000], *pos, *end; | |
29813cfd JM |
243 | char *err = NULL; |
244 | ||
6d49d9ec | 245 | if (!valid_db_string(permanent) || !valid_db_string(reauth_id)) { |
29813cfd JM |
246 | os_free(reauth_id); |
247 | return -1; | |
248 | } | |
29813cfd JM |
249 | |
250 | pos = cmd; | |
251 | end = pos + sizeof(cmd); | |
252 | pos += os_snprintf(pos, end - pos, "INSERT OR REPLACE INTO reauth " | |
6d49d9ec JM |
253 | "(permanent, reauth_id, counter%s%s%s%s) " |
254 | "VALUES ('%s', '%s', %u", | |
29813cfd JM |
255 | mk ? ", mk" : "", |
256 | k_encr ? ", k_encr" : "", | |
257 | k_aut ? ", k_aut" : "", | |
258 | k_re ? ", k_re" : "", | |
6d49d9ec | 259 | permanent, reauth_id, counter); |
29813cfd JM |
260 | os_free(reauth_id); |
261 | ||
262 | if (mk) { | |
263 | pos += os_snprintf(pos, end - pos, ", '"); | |
264 | pos += wpa_snprintf_hex(pos, end - pos, mk, EAP_SIM_MK_LEN); | |
265 | pos += os_snprintf(pos, end - pos, "'"); | |
266 | } | |
267 | ||
268 | if (k_encr) { | |
269 | pos += os_snprintf(pos, end - pos, ", '"); | |
270 | pos += wpa_snprintf_hex(pos, end - pos, k_encr, | |
271 | EAP_SIM_K_ENCR_LEN); | |
272 | pos += os_snprintf(pos, end - pos, "'"); | |
273 | } | |
274 | ||
275 | if (k_aut) { | |
276 | pos += os_snprintf(pos, end - pos, ", '"); | |
277 | pos += wpa_snprintf_hex(pos, end - pos, k_aut, | |
278 | EAP_AKA_PRIME_K_AUT_LEN); | |
279 | pos += os_snprintf(pos, end - pos, "'"); | |
280 | } | |
281 | ||
282 | if (k_re) { | |
283 | pos += os_snprintf(pos, end - pos, ", '"); | |
284 | pos += wpa_snprintf_hex(pos, end - pos, k_re, | |
285 | EAP_AKA_PRIME_K_RE_LEN); | |
286 | pos += os_snprintf(pos, end - pos, "'"); | |
287 | } | |
288 | ||
289 | os_snprintf(pos, end - pos, ");"); | |
290 | ||
291 | if (sqlite3_exec(data->sqlite_db, cmd, NULL, NULL, &err) != SQLITE_OK) | |
292 | { | |
293 | wpa_printf(MSG_ERROR, "EAP-SIM DB: SQLite error: %s", err); | |
294 | sqlite3_free(err); | |
295 | return -1; | |
296 | } | |
297 | ||
298 | return 0; | |
299 | } | |
300 | ||
301 | ||
302 | static int get_reauth_cb(void *ctx, int argc, char *argv[], char *col[]) | |
303 | { | |
304 | struct eap_sim_db_data *data = ctx; | |
305 | int i; | |
29813cfd JM |
306 | struct eap_sim_reauth *reauth = &data->db_tmp_reauth; |
307 | ||
308 | for (i = 0; i < argc; i++) { | |
6d49d9ec | 309 | if (os_strcmp(col[i], "permanent") == 0 && argv[i]) { |
61e181db JM |
310 | os_strlcpy(data->db_tmp_identity, argv[i], |
311 | sizeof(data->db_tmp_identity)); | |
312 | reauth->permanent = data->db_tmp_identity; | |
29813cfd JM |
313 | } else if (os_strcmp(col[i], "counter") == 0 && argv[i]) { |
314 | reauth->counter = atoi(argv[i]); | |
29813cfd JM |
315 | } else if (os_strcmp(col[i], "mk") == 0 && argv[i]) { |
316 | hexstr2bin(argv[i], reauth->mk, sizeof(reauth->mk)); | |
317 | } else if (os_strcmp(col[i], "k_encr") == 0 && argv[i]) { | |
318 | hexstr2bin(argv[i], reauth->k_encr, | |
319 | sizeof(reauth->k_encr)); | |
320 | } else if (os_strcmp(col[i], "k_aut") == 0 && argv[i]) { | |
321 | hexstr2bin(argv[i], reauth->k_aut, | |
322 | sizeof(reauth->k_aut)); | |
323 | } else if (os_strcmp(col[i], "k_re") == 0 && argv[i]) { | |
324 | hexstr2bin(argv[i], reauth->k_re, | |
325 | sizeof(reauth->k_re)); | |
326 | } | |
327 | } | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | ||
333 | static struct eap_sim_reauth * | |
334 | db_get_reauth(struct eap_sim_db_data *data, const char *reauth_id) | |
335 | { | |
336 | char cmd[256]; | |
337 | ||
3961dffc | 338 | if (!valid_db_string(reauth_id)) |
29813cfd JM |
339 | return NULL; |
340 | os_memset(&data->db_tmp_reauth, 0, sizeof(data->db_tmp_reauth)); | |
341 | os_strlcpy(data->db_tmp_pseudonym_str, reauth_id, | |
342 | sizeof(data->db_tmp_pseudonym_str)); | |
343 | data->db_tmp_reauth.reauth_id = data->db_tmp_pseudonym_str; | |
344 | os_snprintf(cmd, sizeof(cmd), | |
345 | "SELECT * FROM reauth WHERE reauth_id='%s';", reauth_id); | |
346 | if (sqlite3_exec(data->sqlite_db, cmd, get_reauth_cb, data, NULL) != | |
347 | SQLITE_OK) | |
348 | return NULL; | |
61e181db | 349 | if (data->db_tmp_reauth.permanent == NULL) |
29813cfd JM |
350 | return NULL; |
351 | return &data->db_tmp_reauth; | |
352 | } | |
353 | ||
354 | ||
355 | static void db_remove_reauth(struct eap_sim_db_data *data, | |
356 | struct eap_sim_reauth *reauth) | |
357 | { | |
358 | char cmd[256]; | |
29813cfd | 359 | |
6d49d9ec JM |
360 | if (!valid_db_string(reauth->permanent)) |
361 | return; | |
29813cfd | 362 | os_snprintf(cmd, sizeof(cmd), |
6d49d9ec JM |
363 | "DELETE FROM reauth WHERE permanent='%s';", |
364 | reauth->permanent); | |
29813cfd JM |
365 | sqlite3_exec(data->sqlite_db, cmd, NULL, NULL, NULL); |
366 | } | |
367 | ||
66979bb8 JM |
368 | #endif /* CONFIG_SQLITE */ |
369 | ||
29813cfd | 370 | |
6fc6879b | 371 | static struct eap_sim_db_pending * |
61e181db | 372 | eap_sim_db_get_pending(struct eap_sim_db_data *data, const char *imsi, int aka) |
6fc6879b JM |
373 | { |
374 | struct eap_sim_db_pending *entry, *prev = NULL; | |
375 | ||
376 | entry = data->pending; | |
377 | while (entry) { | |
61e181db | 378 | if (entry->aka == aka && os_strcmp(entry->imsi, imsi) == 0) { |
6fc6879b JM |
379 | if (prev) |
380 | prev->next = entry->next; | |
381 | else | |
382 | data->pending = entry->next; | |
383 | break; | |
384 | } | |
385 | prev = entry; | |
386 | entry = entry->next; | |
387 | } | |
388 | return entry; | |
389 | } | |
390 | ||
391 | ||
392 | static void eap_sim_db_add_pending(struct eap_sim_db_data *data, | |
393 | struct eap_sim_db_pending *entry) | |
394 | { | |
395 | entry->next = data->pending; | |
396 | data->pending = entry; | |
397 | } | |
398 | ||
399 | ||
400 | static void eap_sim_db_sim_resp_auth(struct eap_sim_db_data *data, | |
401 | const char *imsi, char *buf) | |
402 | { | |
403 | char *start, *end, *pos; | |
404 | struct eap_sim_db_pending *entry; | |
405 | int num_chal; | |
406 | ||
407 | /* | |
408 | * SIM-RESP-AUTH <IMSI> Kc(i):SRES(i):RAND(i) ... | |
409 | * SIM-RESP-AUTH <IMSI> FAILURE | |
410 | * (IMSI = ASCII string, Kc/SRES/RAND = hex string) | |
411 | */ | |
412 | ||
61e181db | 413 | entry = eap_sim_db_get_pending(data, imsi, 0); |
6fc6879b JM |
414 | if (entry == NULL) { |
415 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: No pending entry for the " | |
416 | "received message found"); | |
417 | return; | |
418 | } | |
419 | ||
420 | start = buf; | |
421 | if (os_strncmp(start, "FAILURE", 7) == 0) { | |
422 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: External server reported " | |
423 | "failure"); | |
424 | entry->state = FAILURE; | |
425 | eap_sim_db_add_pending(data, entry); | |
426 | data->get_complete_cb(data->ctx, entry->cb_session_ctx); | |
427 | return; | |
428 | } | |
429 | ||
430 | num_chal = 0; | |
431 | while (num_chal < EAP_SIM_MAX_CHAL) { | |
432 | end = os_strchr(start, ' '); | |
433 | if (end) | |
434 | *end = '\0'; | |
435 | ||
436 | pos = os_strchr(start, ':'); | |
437 | if (pos == NULL) | |
438 | goto parse_fail; | |
439 | *pos = '\0'; | |
440 | if (hexstr2bin(start, entry->u.sim.kc[num_chal], | |
441 | EAP_SIM_KC_LEN)) | |
442 | goto parse_fail; | |
443 | ||
444 | start = pos + 1; | |
445 | pos = os_strchr(start, ':'); | |
446 | if (pos == NULL) | |
447 | goto parse_fail; | |
448 | *pos = '\0'; | |
449 | if (hexstr2bin(start, entry->u.sim.sres[num_chal], | |
450 | EAP_SIM_SRES_LEN)) | |
451 | goto parse_fail; | |
452 | ||
453 | start = pos + 1; | |
454 | if (hexstr2bin(start, entry->u.sim.rand[num_chal], | |
455 | GSM_RAND_LEN)) | |
456 | goto parse_fail; | |
457 | ||
458 | num_chal++; | |
459 | if (end == NULL) | |
460 | break; | |
461 | else | |
462 | start = end + 1; | |
463 | } | |
464 | entry->u.sim.num_chal = num_chal; | |
465 | ||
466 | entry->state = SUCCESS; | |
467 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Authentication data parsed " | |
468 | "successfully - callback"); | |
469 | eap_sim_db_add_pending(data, entry); | |
470 | data->get_complete_cb(data->ctx, entry->cb_session_ctx); | |
471 | return; | |
472 | ||
473 | parse_fail: | |
474 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Failed to parse response string"); | |
475 | os_free(entry); | |
476 | } | |
477 | ||
478 | ||
479 | static void eap_sim_db_aka_resp_auth(struct eap_sim_db_data *data, | |
480 | const char *imsi, char *buf) | |
481 | { | |
482 | char *start, *end; | |
483 | struct eap_sim_db_pending *entry; | |
484 | ||
485 | /* | |
486 | * AKA-RESP-AUTH <IMSI> <RAND> <AUTN> <IK> <CK> <RES> | |
487 | * AKA-RESP-AUTH <IMSI> FAILURE | |
488 | * (IMSI = ASCII string, RAND/AUTN/IK/CK/RES = hex string) | |
489 | */ | |
490 | ||
61e181db | 491 | entry = eap_sim_db_get_pending(data, imsi, 1); |
6fc6879b JM |
492 | if (entry == NULL) { |
493 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: No pending entry for the " | |
494 | "received message found"); | |
495 | return; | |
496 | } | |
497 | ||
498 | start = buf; | |
499 | if (os_strncmp(start, "FAILURE", 7) == 0) { | |
500 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: External server reported " | |
501 | "failure"); | |
502 | entry->state = FAILURE; | |
503 | eap_sim_db_add_pending(data, entry); | |
504 | data->get_complete_cb(data->ctx, entry->cb_session_ctx); | |
505 | return; | |
506 | } | |
507 | ||
508 | end = os_strchr(start, ' '); | |
509 | if (end == NULL) | |
510 | goto parse_fail; | |
511 | *end = '\0'; | |
512 | if (hexstr2bin(start, entry->u.aka.rand, EAP_AKA_RAND_LEN)) | |
513 | goto parse_fail; | |
514 | ||
515 | start = end + 1; | |
516 | end = os_strchr(start, ' '); | |
517 | if (end == NULL) | |
518 | goto parse_fail; | |
519 | *end = '\0'; | |
520 | if (hexstr2bin(start, entry->u.aka.autn, EAP_AKA_AUTN_LEN)) | |
521 | goto parse_fail; | |
522 | ||
523 | start = end + 1; | |
524 | end = os_strchr(start, ' '); | |
525 | if (end == NULL) | |
526 | goto parse_fail; | |
527 | *end = '\0'; | |
528 | if (hexstr2bin(start, entry->u.aka.ik, EAP_AKA_IK_LEN)) | |
529 | goto parse_fail; | |
530 | ||
531 | start = end + 1; | |
532 | end = os_strchr(start, ' '); | |
533 | if (end == NULL) | |
534 | goto parse_fail; | |
535 | *end = '\0'; | |
536 | if (hexstr2bin(start, entry->u.aka.ck, EAP_AKA_CK_LEN)) | |
537 | goto parse_fail; | |
538 | ||
539 | start = end + 1; | |
540 | end = os_strchr(start, ' '); | |
541 | if (end) | |
542 | *end = '\0'; | |
543 | else { | |
544 | end = start; | |
545 | while (*end) | |
546 | end++; | |
547 | } | |
548 | entry->u.aka.res_len = (end - start) / 2; | |
549 | if (entry->u.aka.res_len > EAP_AKA_RES_MAX_LEN) { | |
550 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Too long RES"); | |
551 | entry->u.aka.res_len = 0; | |
552 | goto parse_fail; | |
553 | } | |
554 | if (hexstr2bin(start, entry->u.aka.res, entry->u.aka.res_len)) | |
555 | goto parse_fail; | |
556 | ||
557 | entry->state = SUCCESS; | |
558 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Authentication data parsed " | |
559 | "successfully - callback"); | |
560 | eap_sim_db_add_pending(data, entry); | |
561 | data->get_complete_cb(data->ctx, entry->cb_session_ctx); | |
562 | return; | |
563 | ||
564 | parse_fail: | |
565 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Failed to parse response string"); | |
566 | os_free(entry); | |
567 | } | |
568 | ||
569 | ||
570 | static void eap_sim_db_receive(int sock, void *eloop_ctx, void *sock_ctx) | |
571 | { | |
572 | struct eap_sim_db_data *data = eloop_ctx; | |
573 | char buf[1000], *pos, *cmd, *imsi; | |
574 | int res; | |
575 | ||
576 | res = recv(sock, buf, sizeof(buf), 0); | |
577 | if (res < 0) | |
578 | return; | |
579 | wpa_hexdump_ascii_key(MSG_MSGDUMP, "EAP-SIM DB: Received from an " | |
580 | "external source", (u8 *) buf, res); | |
581 | if (res == 0) | |
582 | return; | |
583 | if (res >= (int) sizeof(buf)) | |
584 | res = sizeof(buf) - 1; | |
585 | buf[res] = '\0'; | |
586 | ||
587 | if (data->get_complete_cb == NULL) { | |
588 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: No get_complete_cb " | |
589 | "registered"); | |
590 | return; | |
591 | } | |
592 | ||
593 | /* <cmd> <IMSI> ... */ | |
594 | ||
595 | cmd = buf; | |
596 | pos = os_strchr(cmd, ' '); | |
597 | if (pos == NULL) | |
598 | goto parse_fail; | |
599 | *pos = '\0'; | |
600 | imsi = pos + 1; | |
601 | pos = os_strchr(imsi, ' '); | |
602 | if (pos == NULL) | |
603 | goto parse_fail; | |
604 | *pos = '\0'; | |
605 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: External response=%s for IMSI %s", | |
606 | cmd, imsi); | |
607 | ||
608 | if (os_strcmp(cmd, "SIM-RESP-AUTH") == 0) | |
609 | eap_sim_db_sim_resp_auth(data, imsi, pos + 1); | |
610 | else if (os_strcmp(cmd, "AKA-RESP-AUTH") == 0) | |
611 | eap_sim_db_aka_resp_auth(data, imsi, pos + 1); | |
612 | else | |
613 | wpa_printf(MSG_INFO, "EAP-SIM DB: Unknown external response " | |
614 | "'%s'", cmd); | |
615 | return; | |
616 | ||
617 | parse_fail: | |
618 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Failed to parse response string"); | |
619 | } | |
620 | ||
621 | ||
622 | static int eap_sim_db_open_socket(struct eap_sim_db_data *data) | |
623 | { | |
624 | struct sockaddr_un addr; | |
625 | static int counter = 0; | |
626 | ||
627 | if (os_strncmp(data->fname, "unix:", 5) != 0) | |
628 | return -1; | |
629 | ||
630 | data->sock = socket(PF_UNIX, SOCK_DGRAM, 0); | |
631 | if (data->sock < 0) { | |
61323e70 | 632 | wpa_printf(MSG_INFO, "socket(eap_sim_db): %s", strerror(errno)); |
6fc6879b JM |
633 | return -1; |
634 | } | |
635 | ||
636 | os_memset(&addr, 0, sizeof(addr)); | |
637 | addr.sun_family = AF_UNIX; | |
638 | os_snprintf(addr.sun_path, sizeof(addr.sun_path), | |
639 | "/tmp/eap_sim_db_%d-%d", getpid(), counter++); | |
c13f0a3e | 640 | os_free(data->local_sock); |
6fc6879b JM |
641 | data->local_sock = os_strdup(addr.sun_path); |
642 | if (bind(data->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
61323e70 | 643 | wpa_printf(MSG_INFO, "bind(eap_sim_db): %s", strerror(errno)); |
6fc6879b JM |
644 | close(data->sock); |
645 | data->sock = -1; | |
646 | return -1; | |
647 | } | |
648 | ||
649 | os_memset(&addr, 0, sizeof(addr)); | |
650 | addr.sun_family = AF_UNIX; | |
651 | os_strlcpy(addr.sun_path, data->fname + 5, sizeof(addr.sun_path)); | |
652 | if (connect(data->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
61323e70 JM |
653 | wpa_printf(MSG_INFO, "connect(eap_sim_db): %s", |
654 | strerror(errno)); | |
6fc6879b JM |
655 | wpa_hexdump_ascii(MSG_INFO, "HLR/AuC GW socket", |
656 | (u8 *) addr.sun_path, | |
657 | os_strlen(addr.sun_path)); | |
658 | close(data->sock); | |
659 | data->sock = -1; | |
660 | return -1; | |
661 | } | |
662 | ||
663 | eloop_register_read_sock(data->sock, eap_sim_db_receive, data, NULL); | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
668 | ||
669 | static void eap_sim_db_close_socket(struct eap_sim_db_data *data) | |
670 | { | |
671 | if (data->sock >= 0) { | |
672 | eloop_unregister_read_sock(data->sock); | |
673 | close(data->sock); | |
674 | data->sock = -1; | |
675 | } | |
676 | if (data->local_sock) { | |
677 | unlink(data->local_sock); | |
678 | os_free(data->local_sock); | |
679 | data->local_sock = NULL; | |
680 | } | |
681 | } | |
682 | ||
683 | ||
684 | /** | |
685 | * eap_sim_db_init - Initialize EAP-SIM DB / authentication gateway interface | |
686 | * @config: Configuration data (e.g., file name) | |
687 | * @get_complete_cb: Callback function for reporting availability of triplets | |
688 | * @ctx: Context pointer for get_complete_cb | |
689 | * Returns: Pointer to a private data structure or %NULL on failure | |
690 | */ | |
f24630d2 JM |
691 | struct eap_sim_db_data * |
692 | eap_sim_db_init(const char *config, | |
693 | void (*get_complete_cb)(void *ctx, void *session_ctx), | |
694 | void *ctx) | |
6fc6879b JM |
695 | { |
696 | struct eap_sim_db_data *data; | |
66979bb8 | 697 | char *pos; |
6fc6879b JM |
698 | |
699 | data = os_zalloc(sizeof(*data)); | |
700 | if (data == NULL) | |
701 | return NULL; | |
702 | ||
703 | data->sock = -1; | |
704 | data->get_complete_cb = get_complete_cb; | |
705 | data->ctx = ctx; | |
706 | data->fname = os_strdup(config); | |
707 | if (data->fname == NULL) | |
708 | goto fail; | |
66979bb8 JM |
709 | pos = os_strstr(data->fname, " db="); |
710 | if (pos) { | |
711 | *pos = '\0'; | |
712 | #ifdef CONFIG_SQLITE | |
713 | pos += 4; | |
714 | data->sqlite_db = db_open(pos); | |
715 | if (data->sqlite_db == NULL) | |
716 | goto fail; | |
717 | #endif /* CONFIG_SQLITE */ | |
718 | } | |
6fc6879b JM |
719 | |
720 | if (os_strncmp(data->fname, "unix:", 5) == 0) { | |
704b8762 JM |
721 | if (eap_sim_db_open_socket(data)) { |
722 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: External database " | |
723 | "connection not available - will retry " | |
724 | "later"); | |
725 | } | |
6fc6879b JM |
726 | } |
727 | ||
728 | return data; | |
729 | ||
730 | fail: | |
731 | eap_sim_db_close_socket(data); | |
732 | os_free(data->fname); | |
733 | os_free(data); | |
734 | return NULL; | |
735 | } | |
736 | ||
737 | ||
738 | static void eap_sim_db_free_pseudonym(struct eap_sim_pseudonym *p) | |
739 | { | |
61e181db | 740 | os_free(p->permanent); |
6fc6879b JM |
741 | os_free(p->pseudonym); |
742 | os_free(p); | |
743 | } | |
744 | ||
745 | ||
746 | static void eap_sim_db_free_reauth(struct eap_sim_reauth *r) | |
747 | { | |
61e181db | 748 | os_free(r->permanent); |
6fc6879b JM |
749 | os_free(r->reauth_id); |
750 | os_free(r); | |
751 | } | |
752 | ||
753 | ||
754 | /** | |
755 | * eap_sim_db_deinit - Deinitialize EAP-SIM DB/authentication gw interface | |
756 | * @priv: Private data pointer from eap_sim_db_init() | |
757 | */ | |
758 | void eap_sim_db_deinit(void *priv) | |
759 | { | |
760 | struct eap_sim_db_data *data = priv; | |
761 | struct eap_sim_pseudonym *p, *prev; | |
762 | struct eap_sim_reauth *r, *prevr; | |
763 | struct eap_sim_db_pending *pending, *prev_pending; | |
764 | ||
66979bb8 JM |
765 | #ifdef CONFIG_SQLITE |
766 | if (data->sqlite_db) { | |
767 | sqlite3_close(data->sqlite_db); | |
768 | data->sqlite_db = NULL; | |
769 | } | |
770 | #endif /* CONFIG_SQLITE */ | |
771 | ||
6fc6879b JM |
772 | eap_sim_db_close_socket(data); |
773 | os_free(data->fname); | |
774 | ||
775 | p = data->pseudonyms; | |
776 | while (p) { | |
777 | prev = p; | |
778 | p = p->next; | |
779 | eap_sim_db_free_pseudonym(prev); | |
780 | } | |
781 | ||
782 | r = data->reauths; | |
783 | while (r) { | |
784 | prevr = r; | |
785 | r = r->next; | |
786 | eap_sim_db_free_reauth(prevr); | |
787 | } | |
788 | ||
789 | pending = data->pending; | |
790 | while (pending) { | |
791 | prev_pending = pending; | |
792 | pending = pending->next; | |
793 | os_free(prev_pending); | |
794 | } | |
795 | ||
796 | os_free(data); | |
797 | } | |
798 | ||
799 | ||
800 | static int eap_sim_db_send(struct eap_sim_db_data *data, const char *msg, | |
801 | size_t len) | |
802 | { | |
803 | int _errno = 0; | |
804 | ||
805 | if (send(data->sock, msg, len, 0) < 0) { | |
806 | _errno = errno; | |
61323e70 JM |
807 | wpa_printf(MSG_INFO, "send[EAP-SIM DB UNIX]: %s", |
808 | strerror(errno)); | |
6fc6879b JM |
809 | } |
810 | ||
811 | if (_errno == ENOTCONN || _errno == EDESTADDRREQ || _errno == EINVAL || | |
812 | _errno == ECONNREFUSED) { | |
813 | /* Try to reconnect */ | |
814 | eap_sim_db_close_socket(data); | |
815 | if (eap_sim_db_open_socket(data) < 0) | |
816 | return -1; | |
817 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Reconnected to the " | |
818 | "external server"); | |
819 | if (send(data->sock, msg, len, 0) < 0) { | |
61323e70 JM |
820 | wpa_printf(MSG_INFO, "send[EAP-SIM DB UNIX]: %s", |
821 | strerror(errno)); | |
6fc6879b JM |
822 | return -1; |
823 | } | |
824 | } | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
829 | ||
830 | static void eap_sim_db_expire_pending(struct eap_sim_db_data *data) | |
831 | { | |
832 | /* TODO: add limit for maximum length for pending list; remove latest | |
833 | * (i.e., last) entry from the list if the limit is reached; could also | |
834 | * use timeout to expire pending entries */ | |
835 | } | |
836 | ||
837 | ||
838 | /** | |
839 | * eap_sim_db_get_gsm_triplets - Get GSM triplets | |
f24630d2 | 840 | * @data: Private data pointer from eap_sim_db_init() |
61e181db | 841 | * @username: Permanent username (prefix | IMSI) |
6fc6879b JM |
842 | * @max_chal: Maximum number of triplets |
843 | * @_rand: Buffer for RAND values | |
844 | * @kc: Buffer for Kc values | |
845 | * @sres: Buffer for SRES values | |
846 | * @cb_session_ctx: Session callback context for get_complete_cb() | |
847 | * Returns: Number of triplets received (has to be less than or equal to | |
848 | * max_chal), -1 (EAP_SIM_DB_FAILURE) on error (e.g., user not found), or | |
849 | * -2 (EAP_SIM_DB_PENDING) if results are not yet available. In this case, the | |
850 | * callback function registered with eap_sim_db_init() will be called once the | |
851 | * results become available. | |
852 | * | |
6fc6879b JM |
853 | * When using an external server for GSM triplets, this function can always |
854 | * start a request and return EAP_SIM_DB_PENDING immediately if authentication | |
855 | * triplets are not available. Once the triplets are received, callback | |
856 | * function registered with eap_sim_db_init() is called to notify EAP state | |
857 | * machine to reprocess the message. This eap_sim_db_get_gsm_triplets() | |
858 | * function will then be called again and the newly received triplets will then | |
859 | * be given to the caller. | |
860 | */ | |
f24630d2 JM |
861 | int eap_sim_db_get_gsm_triplets(struct eap_sim_db_data *data, |
862 | const char *username, int max_chal, | |
6fc6879b JM |
863 | u8 *_rand, u8 *kc, u8 *sres, |
864 | void *cb_session_ctx) | |
865 | { | |
6fc6879b JM |
866 | struct eap_sim_db_pending *entry; |
867 | int len, ret; | |
6fc6879b | 868 | char msg[40]; |
61e181db JM |
869 | const char *imsi; |
870 | size_t imsi_len; | |
6fc6879b | 871 | |
61e181db JM |
872 | if (username == NULL || username[0] != EAP_SIM_PERMANENT_PREFIX || |
873 | username[1] == '\0' || os_strlen(username) > sizeof(entry->imsi)) { | |
874 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: unexpected username '%s'", | |
875 | username); | |
6fc6879b JM |
876 | return EAP_SIM_DB_FAILURE; |
877 | } | |
61e181db JM |
878 | imsi = username + 1; |
879 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Get GSM triplets for IMSI '%s'", | |
880 | imsi); | |
6fc6879b | 881 | |
61e181db | 882 | entry = eap_sim_db_get_pending(data, imsi, 0); |
6fc6879b JM |
883 | if (entry) { |
884 | int num_chal; | |
885 | if (entry->state == FAILURE) { | |
886 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Pending entry -> " | |
887 | "failure"); | |
888 | os_free(entry); | |
889 | return EAP_SIM_DB_FAILURE; | |
890 | } | |
891 | ||
892 | if (entry->state == PENDING) { | |
893 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Pending entry -> " | |
894 | "still pending"); | |
895 | eap_sim_db_add_pending(data, entry); | |
896 | return EAP_SIM_DB_PENDING; | |
897 | } | |
898 | ||
899 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Pending entry -> " | |
900 | "%d challenges", entry->u.sim.num_chal); | |
901 | num_chal = entry->u.sim.num_chal; | |
902 | if (num_chal > max_chal) | |
903 | num_chal = max_chal; | |
904 | os_memcpy(_rand, entry->u.sim.rand, num_chal * GSM_RAND_LEN); | |
905 | os_memcpy(sres, entry->u.sim.sres, | |
906 | num_chal * EAP_SIM_SRES_LEN); | |
907 | os_memcpy(kc, entry->u.sim.kc, num_chal * EAP_SIM_KC_LEN); | |
908 | os_free(entry); | |
909 | return num_chal; | |
910 | } | |
911 | ||
912 | if (data->sock < 0) { | |
913 | if (eap_sim_db_open_socket(data) < 0) | |
914 | return EAP_SIM_DB_FAILURE; | |
915 | } | |
916 | ||
61e181db | 917 | imsi_len = os_strlen(imsi); |
6fc6879b | 918 | len = os_snprintf(msg, sizeof(msg), "SIM-REQ-AUTH "); |
61e181db | 919 | if (len < 0 || len + imsi_len >= sizeof(msg)) |
6fc6879b | 920 | return EAP_SIM_DB_FAILURE; |
61e181db JM |
921 | os_memcpy(msg + len, imsi, imsi_len); |
922 | len += imsi_len; | |
6fc6879b JM |
923 | ret = os_snprintf(msg + len, sizeof(msg) - len, " %d", max_chal); |
924 | if (ret < 0 || (size_t) ret >= sizeof(msg) - len) | |
925 | return EAP_SIM_DB_FAILURE; | |
926 | len += ret; | |
927 | ||
61e181db JM |
928 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: requesting SIM authentication " |
929 | "data for IMSI '%s'", imsi); | |
6fc6879b JM |
930 | if (eap_sim_db_send(data, msg, len) < 0) |
931 | return EAP_SIM_DB_FAILURE; | |
932 | ||
933 | entry = os_zalloc(sizeof(*entry)); | |
934 | if (entry == NULL) | |
935 | return EAP_SIM_DB_FAILURE; | |
936 | ||
61e181db | 937 | os_strlcpy(entry->imsi, imsi, sizeof(entry->imsi)); |
6fc6879b JM |
938 | entry->cb_session_ctx = cb_session_ctx; |
939 | entry->state = PENDING; | |
940 | eap_sim_db_add_pending(data, entry); | |
941 | eap_sim_db_expire_pending(data); | |
942 | ||
943 | return EAP_SIM_DB_PENDING; | |
944 | } | |
945 | ||
946 | ||
6fc6879b JM |
947 | static char * eap_sim_db_get_next(struct eap_sim_db_data *data, char prefix) |
948 | { | |
949 | char *id, *pos, *end; | |
950 | u8 buf[10]; | |
951 | ||
3642c431 | 952 | if (random_get_bytes(buf, sizeof(buf))) |
6fc6879b JM |
953 | return NULL; |
954 | id = os_malloc(sizeof(buf) * 2 + 2); | |
955 | if (id == NULL) | |
956 | return NULL; | |
957 | ||
958 | pos = id; | |
959 | end = id + sizeof(buf) * 2 + 2; | |
960 | *pos++ = prefix; | |
961 | pos += wpa_snprintf_hex(pos, end - pos, buf, sizeof(buf)); | |
962 | ||
963 | return id; | |
964 | } | |
965 | ||
966 | ||
967 | /** | |
968 | * eap_sim_db_get_next_pseudonym - EAP-SIM DB: Get next pseudonym | |
f24630d2 | 969 | * @data: Private data pointer from eap_sim_db_init() |
762e4ce6 | 970 | * @method: EAP method (SIM/AKA/AKA') |
6fc6879b JM |
971 | * Returns: Next pseudonym (allocated string) or %NULL on failure |
972 | * | |
973 | * This function is used to generate a pseudonym for EAP-SIM. The returned | |
974 | * pseudonym is not added to database at this point; it will need to be added | |
975 | * with eap_sim_db_add_pseudonym() once the authentication has been completed | |
976 | * successfully. Caller is responsible for freeing the returned buffer. | |
977 | */ | |
f24630d2 JM |
978 | char * eap_sim_db_get_next_pseudonym(struct eap_sim_db_data *data, |
979 | enum eap_sim_db_method method) | |
6fc6879b | 980 | { |
762e4ce6 JM |
981 | char prefix = EAP_SIM_REAUTH_ID_PREFIX; |
982 | ||
983 | switch (method) { | |
984 | case EAP_SIM_DB_SIM: | |
985 | prefix = EAP_SIM_PSEUDONYM_PREFIX; | |
986 | break; | |
987 | case EAP_SIM_DB_AKA: | |
988 | prefix = EAP_AKA_PSEUDONYM_PREFIX; | |
989 | break; | |
990 | case EAP_SIM_DB_AKA_PRIME: | |
991 | prefix = EAP_AKA_PRIME_PSEUDONYM_PREFIX; | |
992 | break; | |
993 | } | |
994 | ||
995 | return eap_sim_db_get_next(data, prefix); | |
6fc6879b JM |
996 | } |
997 | ||
998 | ||
999 | /** | |
1000 | * eap_sim_db_get_next_reauth_id - EAP-SIM DB: Get next reauth_id | |
f24630d2 | 1001 | * @data: Private data pointer from eap_sim_db_init() |
762e4ce6 | 1002 | * @method: EAP method (SIM/AKA/AKA') |
6fc6879b JM |
1003 | * Returns: Next reauth_id (allocated string) or %NULL on failure |
1004 | * | |
1005 | * This function is used to generate a fast re-authentication identity for | |
1006 | * EAP-SIM. The returned reauth_id is not added to database at this point; it | |
1007 | * will need to be added with eap_sim_db_add_reauth() once the authentication | |
1008 | * has been completed successfully. Caller is responsible for freeing the | |
1009 | * returned buffer. | |
1010 | */ | |
f24630d2 JM |
1011 | char * eap_sim_db_get_next_reauth_id(struct eap_sim_db_data *data, |
1012 | enum eap_sim_db_method method) | |
6fc6879b | 1013 | { |
762e4ce6 JM |
1014 | char prefix = EAP_SIM_REAUTH_ID_PREFIX; |
1015 | ||
1016 | switch (method) { | |
1017 | case EAP_SIM_DB_SIM: | |
1018 | prefix = EAP_SIM_REAUTH_ID_PREFIX; | |
1019 | break; | |
1020 | case EAP_SIM_DB_AKA: | |
1021 | prefix = EAP_AKA_REAUTH_ID_PREFIX; | |
1022 | break; | |
1023 | case EAP_SIM_DB_AKA_PRIME: | |
1024 | prefix = EAP_AKA_PRIME_REAUTH_ID_PREFIX; | |
1025 | break; | |
1026 | } | |
1027 | ||
1028 | return eap_sim_db_get_next(data, prefix); | |
6fc6879b JM |
1029 | } |
1030 | ||
1031 | ||
1032 | /** | |
1033 | * eap_sim_db_add_pseudonym - EAP-SIM DB: Add new pseudonym | |
f24630d2 | 1034 | * @data: Private data pointer from eap_sim_db_init() |
61e181db | 1035 | * @permanent: Permanent username |
6fc6879b JM |
1036 | * @pseudonym: Pseudonym for this user. This needs to be an allocated buffer, |
1037 | * e.g., return value from eap_sim_db_get_next_pseudonym(). Caller must not | |
1038 | * free it. | |
1039 | * Returns: 0 on success, -1 on failure | |
1040 | * | |
1041 | * This function adds a new pseudonym for EAP-SIM user. EAP-SIM DB is | |
1042 | * responsible of freeing pseudonym buffer once it is not needed anymore. | |
1043 | */ | |
f24630d2 JM |
1044 | int eap_sim_db_add_pseudonym(struct eap_sim_db_data *data, |
1045 | const char *permanent, char *pseudonym) | |
6fc6879b | 1046 | { |
6fc6879b | 1047 | struct eap_sim_pseudonym *p; |
61e181db JM |
1048 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Add pseudonym '%s' for permanent " |
1049 | "username '%s'", pseudonym, permanent); | |
6fc6879b JM |
1050 | |
1051 | /* TODO: could store last two pseudonyms */ | |
66979bb8 JM |
1052 | #ifdef CONFIG_SQLITE |
1053 | if (data->sqlite_db) | |
61e181db | 1054 | return db_add_pseudonym(data, permanent, pseudonym); |
66979bb8 | 1055 | #endif /* CONFIG_SQLITE */ |
61e181db JM |
1056 | for (p = data->pseudonyms; p; p = p->next) { |
1057 | if (os_strcmp(permanent, p->permanent) == 0) | |
1058 | break; | |
1059 | } | |
6fc6879b JM |
1060 | if (p) { |
1061 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Replacing previous " | |
1062 | "pseudonym: %s", p->pseudonym); | |
1063 | os_free(p->pseudonym); | |
1064 | p->pseudonym = pseudonym; | |
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | p = os_zalloc(sizeof(*p)); | |
1069 | if (p == NULL) { | |
1070 | os_free(pseudonym); | |
1071 | return -1; | |
1072 | } | |
1073 | ||
1074 | p->next = data->pseudonyms; | |
61e181db JM |
1075 | p->permanent = os_strdup(permanent); |
1076 | if (p->permanent == NULL) { | |
6fc6879b JM |
1077 | os_free(p); |
1078 | os_free(pseudonym); | |
1079 | return -1; | |
1080 | } | |
6fc6879b JM |
1081 | p->pseudonym = pseudonym; |
1082 | data->pseudonyms = p; | |
1083 | ||
1084 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Added new pseudonym entry"); | |
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | ||
9881795e | 1089 | static struct eap_sim_reauth * |
61e181db JM |
1090 | eap_sim_db_add_reauth_data(struct eap_sim_db_data *data, |
1091 | const char *permanent, | |
1092 | char *reauth_id, u16 counter) | |
6fc6879b | 1093 | { |
6fc6879b | 1094 | struct eap_sim_reauth *r; |
9881795e | 1095 | |
61e181db JM |
1096 | for (r = data->reauths; r; r = r->next) { |
1097 | if (os_strcmp(r->permanent, permanent) == 0) | |
1098 | break; | |
1099 | } | |
6fc6879b JM |
1100 | |
1101 | if (r) { | |
1102 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Replacing previous " | |
1103 | "reauth_id: %s", r->reauth_id); | |
1104 | os_free(r->reauth_id); | |
1105 | r->reauth_id = reauth_id; | |
1106 | } else { | |
1107 | r = os_zalloc(sizeof(*r)); | |
1108 | if (r == NULL) { | |
1109 | os_free(reauth_id); | |
9881795e | 1110 | return NULL; |
6fc6879b JM |
1111 | } |
1112 | ||
1113 | r->next = data->reauths; | |
61e181db JM |
1114 | r->permanent = os_strdup(permanent); |
1115 | if (r->permanent == NULL) { | |
6fc6879b JM |
1116 | os_free(r); |
1117 | os_free(reauth_id); | |
9881795e | 1118 | return NULL; |
6fc6879b | 1119 | } |
6fc6879b JM |
1120 | r->reauth_id = reauth_id; |
1121 | data->reauths = r; | |
1122 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Added new reauth entry"); | |
1123 | } | |
1124 | ||
1125 | r->counter = counter; | |
9881795e JM |
1126 | |
1127 | return r; | |
1128 | } | |
1129 | ||
1130 | ||
1131 | /** | |
1132 | * eap_sim_db_add_reauth - EAP-SIM DB: Add new re-authentication entry | |
1133 | * @priv: Private data pointer from eap_sim_db_init() | |
61e181db | 1134 | * @permanent: Permanent username |
9881795e JM |
1135 | * @identity_len: Length of identity |
1136 | * @reauth_id: reauth_id for this user. This needs to be an allocated buffer, | |
1137 | * e.g., return value from eap_sim_db_get_next_reauth_id(). Caller must not | |
1138 | * free it. | |
a17df5fb | 1139 | * @counter: AT_COUNTER value for fast re-authentication |
9881795e JM |
1140 | * @mk: 16-byte MK from the previous full authentication or %NULL |
1141 | * Returns: 0 on success, -1 on failure | |
1142 | * | |
1143 | * This function adds a new re-authentication entry for an EAP-SIM user. | |
1144 | * EAP-SIM DB is responsible of freeing reauth_id buffer once it is not needed | |
1145 | * anymore. | |
1146 | */ | |
f24630d2 JM |
1147 | int eap_sim_db_add_reauth(struct eap_sim_db_data *data, const char *permanent, |
1148 | char *reauth_id, u16 counter, const u8 *mk) | |
9881795e | 1149 | { |
9881795e JM |
1150 | struct eap_sim_reauth *r; |
1151 | ||
2c22668c JM |
1152 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Add reauth_id '%s' for permanent " |
1153 | "identity '%s'", reauth_id, permanent); | |
1154 | ||
29813cfd JM |
1155 | #ifdef CONFIG_SQLITE |
1156 | if (data->sqlite_db) | |
61e181db JM |
1157 | return db_add_reauth(data, permanent, reauth_id, counter, mk, |
1158 | NULL, NULL, NULL); | |
29813cfd | 1159 | #endif /* CONFIG_SQLITE */ |
61e181db | 1160 | r = eap_sim_db_add_reauth_data(data, permanent, reauth_id, counter); |
9881795e JM |
1161 | if (r == NULL) |
1162 | return -1; | |
1163 | ||
6fc6879b | 1164 | os_memcpy(r->mk, mk, EAP_SIM_MK_LEN); |
9881795e JM |
1165 | |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | ||
1e5839e0 | 1170 | #ifdef EAP_SERVER_AKA_PRIME |
9881795e JM |
1171 | /** |
1172 | * eap_sim_db_add_reauth_prime - EAP-AKA' DB: Add new re-authentication entry | |
f24630d2 | 1173 | * @data: Private data pointer from eap_sim_db_init() |
61e181db | 1174 | * @permanent: Permanent username |
9881795e JM |
1175 | * @reauth_id: reauth_id for this user. This needs to be an allocated buffer, |
1176 | * e.g., return value from eap_sim_db_get_next_reauth_id(). Caller must not | |
1177 | * free it. | |
a17df5fb JM |
1178 | * @counter: AT_COUNTER value for fast re-authentication |
1179 | * @k_encr: K_encr from the previous full authentication | |
1180 | * @k_aut: K_aut from the previous full authentication | |
1181 | * @k_re: 32-byte K_re from the previous full authentication | |
9881795e JM |
1182 | * Returns: 0 on success, -1 on failure |
1183 | * | |
1184 | * This function adds a new re-authentication entry for an EAP-AKA' user. | |
1185 | * EAP-SIM DB is responsible of freeing reauth_id buffer once it is not needed | |
1186 | * anymore. | |
1187 | */ | |
f24630d2 JM |
1188 | int eap_sim_db_add_reauth_prime(struct eap_sim_db_data *data, |
1189 | const char *permanent, char *reauth_id, | |
1190 | u16 counter, const u8 *k_encr, | |
61e181db | 1191 | const u8 *k_aut, const u8 *k_re) |
9881795e | 1192 | { |
9881795e JM |
1193 | struct eap_sim_reauth *r; |
1194 | ||
61e181db JM |
1195 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Add reauth_id '%s' for permanent " |
1196 | "identity '%s'", reauth_id, permanent); | |
1197 | ||
29813cfd JM |
1198 | #ifdef CONFIG_SQLITE |
1199 | if (data->sqlite_db) | |
61e181db | 1200 | return db_add_reauth(data, permanent, reauth_id, counter, NULL, |
29813cfd JM |
1201 | k_encr, k_aut, k_re); |
1202 | #endif /* CONFIG_SQLITE */ | |
61e181db | 1203 | r = eap_sim_db_add_reauth_data(data, permanent, reauth_id, counter); |
9881795e JM |
1204 | if (r == NULL) |
1205 | return -1; | |
1206 | ||
9881795e JM |
1207 | os_memcpy(r->k_encr, k_encr, EAP_SIM_K_ENCR_LEN); |
1208 | os_memcpy(r->k_aut, k_aut, EAP_AKA_PRIME_K_AUT_LEN); | |
1209 | os_memcpy(r->k_re, k_re, EAP_AKA_PRIME_K_RE_LEN); | |
6fc6879b JM |
1210 | |
1211 | return 0; | |
1212 | } | |
1e5839e0 | 1213 | #endif /* EAP_SERVER_AKA_PRIME */ |
6fc6879b JM |
1214 | |
1215 | ||
1216 | /** | |
1217 | * eap_sim_db_get_permanent - EAP-SIM DB: Get permanent identity | |
f24630d2 | 1218 | * @data: Private data pointer from eap_sim_db_init() |
61e181db JM |
1219 | * @pseudonym: Pseudonym username |
1220 | * Returns: Pointer to permanent username or %NULL if not found | |
6fc6879b | 1221 | */ |
f24630d2 JM |
1222 | const char * |
1223 | eap_sim_db_get_permanent(struct eap_sim_db_data *data, const char *pseudonym) | |
6fc6879b | 1224 | { |
3e43a8ec | 1225 | struct eap_sim_pseudonym *p; |
6fc6879b | 1226 | |
3e43a8ec JM |
1227 | #ifdef CONFIG_SQLITE |
1228 | if (data->sqlite_db) | |
1229 | return db_get_pseudonym(data, pseudonym); | |
1230 | #endif /* CONFIG_SQLITE */ | |
1231 | ||
1232 | p = data->pseudonyms; | |
1233 | while (p) { | |
1234 | if (os_strcmp(p->pseudonym, pseudonym) == 0) | |
1235 | return p->permanent; | |
1236 | p = p->next; | |
1237 | } | |
1238 | ||
1239 | return NULL; | |
6fc6879b JM |
1240 | } |
1241 | ||
1242 | ||
1243 | /** | |
1244 | * eap_sim_db_get_reauth_entry - EAP-SIM DB: Get re-authentication entry | |
f24630d2 | 1245 | * @data: Private data pointer from eap_sim_db_init() |
61e181db | 1246 | * @reauth_id: Fast re-authentication username |
6fc6879b JM |
1247 | * Returns: Pointer to the re-auth entry, or %NULL if not found |
1248 | */ | |
1249 | struct eap_sim_reauth * | |
f24630d2 JM |
1250 | eap_sim_db_get_reauth_entry(struct eap_sim_db_data *data, |
1251 | const char *reauth_id) | |
6fc6879b | 1252 | { |
6fc6879b JM |
1253 | struct eap_sim_reauth *r; |
1254 | ||
3e43a8ec JM |
1255 | #ifdef CONFIG_SQLITE |
1256 | if (data->sqlite_db) | |
1257 | return db_get_reauth(data, reauth_id); | |
1258 | #endif /* CONFIG_SQLITE */ | |
1259 | ||
1260 | r = data->reauths; | |
1261 | while (r) { | |
1262 | if (os_strcmp(r->reauth_id, reauth_id) == 0) | |
1263 | break; | |
1264 | r = r->next; | |
1265 | } | |
1266 | ||
6fc6879b JM |
1267 | return r; |
1268 | } | |
1269 | ||
1270 | ||
1271 | /** | |
1272 | * eap_sim_db_remove_reauth - EAP-SIM DB: Remove re-authentication entry | |
f24630d2 | 1273 | * @data: Private data pointer from eap_sim_db_init() |
6fc6879b JM |
1274 | * @reauth: Pointer to re-authentication entry from |
1275 | * eap_sim_db_get_reauth_entry() | |
1276 | */ | |
f24630d2 JM |
1277 | void eap_sim_db_remove_reauth(struct eap_sim_db_data *data, |
1278 | struct eap_sim_reauth *reauth) | |
6fc6879b | 1279 | { |
6fc6879b | 1280 | struct eap_sim_reauth *r, *prev = NULL; |
29813cfd JM |
1281 | #ifdef CONFIG_SQLITE |
1282 | if (data->sqlite_db) { | |
1283 | db_remove_reauth(data, reauth); | |
1284 | return; | |
1285 | } | |
1286 | #endif /* CONFIG_SQLITE */ | |
6fc6879b JM |
1287 | r = data->reauths; |
1288 | while (r) { | |
1289 | if (r == reauth) { | |
1290 | if (prev) | |
1291 | prev->next = r->next; | |
1292 | else | |
1293 | data->reauths = r->next; | |
1294 | eap_sim_db_free_reauth(r); | |
1295 | return; | |
1296 | } | |
1297 | prev = r; | |
1298 | r = r->next; | |
1299 | } | |
1300 | } | |
1301 | ||
1302 | ||
1303 | /** | |
1304 | * eap_sim_db_get_aka_auth - Get AKA authentication values | |
f24630d2 | 1305 | * @data: Private data pointer from eap_sim_db_init() |
61e181db | 1306 | * @username: Permanent username (prefix | IMSI) |
6fc6879b JM |
1307 | * @_rand: Buffer for RAND value |
1308 | * @autn: Buffer for AUTN value | |
1309 | * @ik: Buffer for IK value | |
1310 | * @ck: Buffer for CK value | |
1311 | * @res: Buffer for RES value | |
1312 | * @res_len: Buffer for RES length | |
1313 | * @cb_session_ctx: Session callback context for get_complete_cb() | |
1314 | * Returns: 0 on success, -1 (EAP_SIM_DB_FAILURE) on error (e.g., user not | |
1315 | * found), or -2 (EAP_SIM_DB_PENDING) if results are not yet available. In this | |
1316 | * case, the callback function registered with eap_sim_db_init() will be | |
1317 | * called once the results become available. | |
1318 | * | |
6fc6879b JM |
1319 | * When using an external server for AKA authentication, this function can |
1320 | * always start a request and return EAP_SIM_DB_PENDING immediately if | |
1321 | * authentication triplets are not available. Once the authentication data are | |
1322 | * received, callback function registered with eap_sim_db_init() is called to | |
1323 | * notify EAP state machine to reprocess the message. This | |
1324 | * eap_sim_db_get_aka_auth() function will then be called again and the newly | |
1325 | * received triplets will then be given to the caller. | |
1326 | */ | |
f24630d2 JM |
1327 | int eap_sim_db_get_aka_auth(struct eap_sim_db_data *data, const char *username, |
1328 | u8 *_rand, u8 *autn, u8 *ik, u8 *ck, | |
1329 | u8 *res, size_t *res_len, void *cb_session_ctx) | |
6fc6879b | 1330 | { |
6fc6879b JM |
1331 | struct eap_sim_db_pending *entry; |
1332 | int len; | |
6fc6879b | 1333 | char msg[40]; |
61e181db JM |
1334 | const char *imsi; |
1335 | size_t imsi_len; | |
6fc6879b | 1336 | |
61e181db JM |
1337 | if (username == NULL || |
1338 | (username[0] != EAP_AKA_PERMANENT_PREFIX && | |
1339 | username[0] != EAP_AKA_PRIME_PERMANENT_PREFIX) || | |
1340 | username[1] == '\0' || os_strlen(username) > sizeof(entry->imsi)) { | |
1341 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: unexpected username '%s'", | |
1342 | username); | |
6fc6879b JM |
1343 | return EAP_SIM_DB_FAILURE; |
1344 | } | |
61e181db JM |
1345 | imsi = username + 1; |
1346 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Get AKA auth for IMSI '%s'", | |
1347 | imsi); | |
6fc6879b | 1348 | |
61e181db | 1349 | entry = eap_sim_db_get_pending(data, imsi, 1); |
6fc6879b JM |
1350 | if (entry) { |
1351 | if (entry->state == FAILURE) { | |
1352 | os_free(entry); | |
1353 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Failure"); | |
1354 | return EAP_SIM_DB_FAILURE; | |
1355 | } | |
1356 | ||
1357 | if (entry->state == PENDING) { | |
1358 | eap_sim_db_add_pending(data, entry); | |
1359 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Pending"); | |
1360 | return EAP_SIM_DB_PENDING; | |
1361 | } | |
1362 | ||
1363 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Returning successfully " | |
1364 | "received authentication data"); | |
1365 | os_memcpy(_rand, entry->u.aka.rand, EAP_AKA_RAND_LEN); | |
1366 | os_memcpy(autn, entry->u.aka.autn, EAP_AKA_AUTN_LEN); | |
1367 | os_memcpy(ik, entry->u.aka.ik, EAP_AKA_IK_LEN); | |
1368 | os_memcpy(ck, entry->u.aka.ck, EAP_AKA_CK_LEN); | |
1369 | os_memcpy(res, entry->u.aka.res, EAP_AKA_RES_MAX_LEN); | |
1370 | *res_len = entry->u.aka.res_len; | |
1371 | os_free(entry); | |
1372 | return 0; | |
1373 | } | |
1374 | ||
1375 | if (data->sock < 0) { | |
1376 | if (eap_sim_db_open_socket(data) < 0) | |
1377 | return EAP_SIM_DB_FAILURE; | |
1378 | } | |
1379 | ||
61e181db | 1380 | imsi_len = os_strlen(imsi); |
6fc6879b | 1381 | len = os_snprintf(msg, sizeof(msg), "AKA-REQ-AUTH "); |
61e181db | 1382 | if (len < 0 || len + imsi_len >= sizeof(msg)) |
6fc6879b | 1383 | return EAP_SIM_DB_FAILURE; |
61e181db JM |
1384 | os_memcpy(msg + len, imsi, imsi_len); |
1385 | len += imsi_len; | |
6fc6879b | 1386 | |
61e181db JM |
1387 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: requesting AKA authentication " |
1388 | "data for IMSI '%s'", imsi); | |
6fc6879b JM |
1389 | if (eap_sim_db_send(data, msg, len) < 0) |
1390 | return EAP_SIM_DB_FAILURE; | |
1391 | ||
1392 | entry = os_zalloc(sizeof(*entry)); | |
1393 | if (entry == NULL) | |
1394 | return EAP_SIM_DB_FAILURE; | |
1395 | ||
6fc6879b | 1396 | entry->aka = 1; |
61e181db | 1397 | os_strlcpy(entry->imsi, imsi, sizeof(entry->imsi)); |
6fc6879b JM |
1398 | entry->cb_session_ctx = cb_session_ctx; |
1399 | entry->state = PENDING; | |
1400 | eap_sim_db_add_pending(data, entry); | |
1401 | eap_sim_db_expire_pending(data); | |
1402 | ||
1403 | return EAP_SIM_DB_PENDING; | |
1404 | } | |
1405 | ||
1406 | ||
1407 | /** | |
1408 | * eap_sim_db_resynchronize - Resynchronize AKA AUTN | |
f24630d2 | 1409 | * @data: Private data pointer from eap_sim_db_init() |
61e181db | 1410 | * @username: Permanent username |
6fc6879b JM |
1411 | * @auts: AUTS value from the peer |
1412 | * @_rand: RAND value used in the rejected message | |
1413 | * Returns: 0 on success, -1 on failure | |
1414 | * | |
1415 | * This function is called when the peer reports synchronization failure in the | |
1416 | * AUTN value by sending AUTS. The AUTS and RAND values should be sent to | |
1417 | * HLR/AuC to allow it to resynchronize with the peer. After this, | |
1418 | * eap_sim_db_get_aka_auth() will be called again to to fetch updated | |
1419 | * RAND/AUTN values for the next challenge. | |
1420 | */ | |
f24630d2 JM |
1421 | int eap_sim_db_resynchronize(struct eap_sim_db_data *data, |
1422 | const char *username, | |
61e181db | 1423 | const u8 *auts, const u8 *_rand) |
6fc6879b | 1424 | { |
61e181db JM |
1425 | const char *imsi; |
1426 | size_t imsi_len; | |
6fc6879b | 1427 | |
61e181db JM |
1428 | if (username == NULL || |
1429 | (username[0] != EAP_AKA_PERMANENT_PREFIX && | |
1430 | username[0] != EAP_AKA_PRIME_PERMANENT_PREFIX) || | |
1431 | username[1] == '\0' || os_strlen(username) > 20) { | |
1432 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: unexpected username '%s'", | |
1433 | username); | |
6fc6879b JM |
1434 | return -1; |
1435 | } | |
61e181db JM |
1436 | imsi = username + 1; |
1437 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Get AKA auth for IMSI '%s'", | |
1438 | imsi); | |
6fc6879b JM |
1439 | |
1440 | if (data->sock >= 0) { | |
1441 | char msg[100]; | |
1442 | int len, ret; | |
1443 | ||
61e181db | 1444 | imsi_len = os_strlen(imsi); |
6fc6879b | 1445 | len = os_snprintf(msg, sizeof(msg), "AKA-AUTS "); |
61e181db | 1446 | if (len < 0 || len + imsi_len >= sizeof(msg)) |
6fc6879b | 1447 | return -1; |
61e181db JM |
1448 | os_memcpy(msg + len, imsi, imsi_len); |
1449 | len += imsi_len; | |
6fc6879b JM |
1450 | |
1451 | ret = os_snprintf(msg + len, sizeof(msg) - len, " "); | |
1452 | if (ret < 0 || (size_t) ret >= sizeof(msg) - len) | |
1453 | return -1; | |
1454 | len += ret; | |
1455 | len += wpa_snprintf_hex(msg + len, sizeof(msg) - len, | |
1456 | auts, EAP_AKA_AUTS_LEN); | |
1457 | ret = os_snprintf(msg + len, sizeof(msg) - len, " "); | |
1458 | if (ret < 0 || (size_t) ret >= sizeof(msg) - len) | |
1459 | return -1; | |
1460 | len += ret; | |
1461 | len += wpa_snprintf_hex(msg + len, sizeof(msg) - len, | |
1462 | _rand, EAP_AKA_RAND_LEN); | |
61e181db JM |
1463 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: reporting AKA AUTS for " |
1464 | "IMSI '%s'", imsi); | |
6fc6879b JM |
1465 | if (eap_sim_db_send(data, msg, len) < 0) |
1466 | return -1; | |
1467 | } | |
1468 | ||
1469 | return 0; | |
1470 | } | |
9bf403b9 JM |
1471 | |
1472 | ||
1473 | /** | |
1474 | * sim_get_username - Extract username from SIM identity | |
1475 | * @identity: Identity | |
1476 | * @identity_len: Identity length | |
1477 | * Returns: Allocated buffer with the username part of the identity | |
1478 | * | |
1479 | * Caller is responsible for freeing the returned buffer with os_free(). | |
1480 | */ | |
1481 | char * sim_get_username(const u8 *identity, size_t identity_len) | |
1482 | { | |
9bf403b9 JM |
1483 | size_t pos; |
1484 | ||
68a41bbb JM |
1485 | if (identity == NULL) |
1486 | return NULL; | |
1487 | ||
9bf403b9 JM |
1488 | for (pos = 0; pos < identity_len; pos++) { |
1489 | if (identity[pos] == '@' || identity[pos] == '\0') | |
1490 | break; | |
1491 | } | |
1492 | ||
5e24dc8a | 1493 | return dup_binstr(identity, pos); |
9bf403b9 | 1494 | } |