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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; | |
41 | struct os_time timestamp; | |
42 | int aka; | |
43 | union { | |
44 | struct { | |
45 | u8 kc[EAP_SIM_MAX_CHAL][EAP_SIM_KC_LEN]; | |
46 | u8 sres[EAP_SIM_MAX_CHAL][EAP_SIM_SRES_LEN]; | |
47 | u8 rand[EAP_SIM_MAX_CHAL][GSM_RAND_LEN]; | |
48 | int num_chal; | |
49 | } sim; | |
50 | struct { | |
51 | u8 rand[EAP_AKA_RAND_LEN]; | |
52 | u8 autn[EAP_AKA_AUTN_LEN]; | |
53 | u8 ik[EAP_AKA_IK_LEN]; | |
54 | u8 ck[EAP_AKA_CK_LEN]; | |
55 | u8 res[EAP_AKA_RES_MAX_LEN]; | |
56 | size_t res_len; | |
57 | } aka; | |
58 | } u; | |
59 | }; | |
60 | ||
61 | struct eap_sim_db_data { | |
62 | int sock; | |
63 | char *fname; | |
64 | char *local_sock; | |
65 | void (*get_complete_cb)(void *ctx, void *session_ctx); | |
66 | void *ctx; | |
67 | struct eap_sim_pseudonym *pseudonyms; | |
68 | struct eap_sim_reauth *reauths; | |
69 | struct eap_sim_db_pending *pending; | |
66979bb8 JM |
70 | #ifdef CONFIG_SQLITE |
71 | sqlite3 *sqlite_db; | |
61e181db | 72 | char db_tmp_identity[100]; |
66979bb8 JM |
73 | char db_tmp_pseudonym_str[100]; |
74 | struct eap_sim_pseudonym db_tmp_pseudonym; | |
29813cfd | 75 | struct eap_sim_reauth db_tmp_reauth; |
66979bb8 | 76 | #endif /* CONFIG_SQLITE */ |
6fc6879b JM |
77 | }; |
78 | ||
79 | ||
66979bb8 JM |
80 | #ifdef CONFIG_SQLITE |
81 | ||
82 | static int db_table_exists(sqlite3 *db, const char *name) | |
83 | { | |
84 | char cmd[128]; | |
85 | os_snprintf(cmd, sizeof(cmd), "SELECT 1 FROM %s;", name); | |
86 | return sqlite3_exec(db, cmd, NULL, NULL, NULL) == SQLITE_OK; | |
87 | } | |
88 | ||
89 | ||
90 | static int db_table_create_pseudonym(sqlite3 *db) | |
91 | { | |
92 | char *err = NULL; | |
93 | const char *sql = | |
94 | "CREATE TABLE pseudonyms(" | |
6d49d9ec | 95 | " permanent CHAR(21) PRIMARY KEY," |
66979bb8 JM |
96 | " pseudonym CHAR(21) NOT NULL" |
97 | ");"; | |
98 | ||
99 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Adding database table for " | |
100 | "pseudonym information"); | |
101 | if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) { | |
102 | wpa_printf(MSG_ERROR, "EAP-SIM DB: SQLite error: %s", err); | |
103 | sqlite3_free(err); | |
104 | return -1; | |
105 | } | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
110 | ||
29813cfd JM |
111 | static int db_table_create_reauth(sqlite3 *db) |
112 | { | |
113 | char *err = NULL; | |
114 | const char *sql = | |
115 | "CREATE TABLE reauth(" | |
6d49d9ec | 116 | " permanent CHAR(21) PRIMARY KEY," |
29813cfd JM |
117 | " reauth_id CHAR(21) NOT NULL," |
118 | " counter INTEGER," | |
29813cfd JM |
119 | " mk CHAR(40)," |
120 | " k_encr CHAR(32)," | |
121 | " k_aut CHAR(64)," | |
122 | " k_re CHAR(64)" | |
123 | ");"; | |
124 | ||
125 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Adding database table for " | |
126 | "reauth information"); | |
127 | if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) { | |
128 | wpa_printf(MSG_ERROR, "EAP-SIM DB: SQLite error: %s", err); | |
129 | sqlite3_free(err); | |
130 | return -1; | |
131 | } | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | ||
66979bb8 JM |
137 | static sqlite3 * db_open(const char *db_file) |
138 | { | |
139 | sqlite3 *db; | |
140 | ||
141 | if (sqlite3_open(db_file, &db)) { | |
142 | wpa_printf(MSG_ERROR, "EAP-SIM DB: Failed to open database " | |
143 | "%s: %s", db_file, sqlite3_errmsg(db)); | |
144 | sqlite3_close(db); | |
145 | return NULL; | |
146 | } | |
147 | ||
148 | if (!db_table_exists(db, "pseudonyms") && | |
149 | db_table_create_pseudonym(db) < 0) { | |
150 | sqlite3_close(db); | |
151 | return NULL; | |
152 | } | |
153 | ||
29813cfd JM |
154 | if (!db_table_exists(db, "reauth") && |
155 | db_table_create_reauth(db) < 0) { | |
156 | sqlite3_close(db); | |
157 | return NULL; | |
158 | } | |
159 | ||
66979bb8 JM |
160 | return db; |
161 | } | |
162 | ||
163 | ||
3961dffc | 164 | static int valid_db_string(const char *str) |
66979bb8 | 165 | { |
3961dffc | 166 | const char *pos = str; |
66979bb8 JM |
167 | while (*pos) { |
168 | if ((*pos < '0' || *pos > '9') && | |
169 | (*pos < 'a' || *pos > 'f')) | |
170 | return 0; | |
171 | pos++; | |
172 | } | |
173 | return 1; | |
174 | } | |
175 | ||
176 | ||
61e181db JM |
177 | static int db_add_pseudonym(struct eap_sim_db_data *data, |
178 | const char *permanent, char *pseudonym) | |
66979bb8 JM |
179 | { |
180 | char cmd[128]; | |
29813cfd | 181 | char *err = NULL; |
66979bb8 | 182 | |
6d49d9ec | 183 | if (!valid_db_string(permanent) || !valid_db_string(pseudonym)) { |
66979bb8 JM |
184 | os_free(pseudonym); |
185 | return -1; | |
186 | } | |
66979bb8 JM |
187 | |
188 | os_snprintf(cmd, sizeof(cmd), "INSERT OR REPLACE INTO pseudonyms " | |
6d49d9ec JM |
189 | "(permanent, pseudonym) VALUES ('%s', '%s');", |
190 | permanent, pseudonym); | |
66979bb8 | 191 | os_free(pseudonym); |
29813cfd JM |
192 | if (sqlite3_exec(data->sqlite_db, cmd, NULL, NULL, &err) != SQLITE_OK) |
193 | { | |
194 | wpa_printf(MSG_ERROR, "EAP-SIM DB: SQLite error: %s", err); | |
195 | sqlite3_free(err); | |
66979bb8 | 196 | return -1; |
29813cfd | 197 | } |
66979bb8 JM |
198 | |
199 | return 0; | |
200 | } | |
201 | ||
202 | ||
203 | static int get_pseudonym_cb(void *ctx, int argc, char *argv[], char *col[]) | |
204 | { | |
205 | struct eap_sim_db_data *data = ctx; | |
206 | int i; | |
66979bb8 JM |
207 | |
208 | for (i = 0; i < argc; i++) { | |
6d49d9ec | 209 | if (os_strcmp(col[i], "permanent") == 0 && argv[i]) { |
61e181db JM |
210 | os_strlcpy(data->db_tmp_identity, argv[i], |
211 | sizeof(data->db_tmp_identity)); | |
66979bb8 JM |
212 | } |
213 | } | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
218 | ||
e95ffe04 | 219 | static char * |
66979bb8 JM |
220 | db_get_pseudonym(struct eap_sim_db_data *data, const char *pseudonym) |
221 | { | |
222 | char cmd[128]; | |
223 | ||
3961dffc | 224 | if (!valid_db_string(pseudonym)) |
66979bb8 | 225 | return NULL; |
e95ffe04 | 226 | os_memset(&data->db_tmp_identity, 0, sizeof(data->db_tmp_identity)); |
66979bb8 | 227 | os_snprintf(cmd, sizeof(cmd), |
6d49d9ec | 228 | "SELECT permanent FROM pseudonyms WHERE pseudonym='%s';", |
66979bb8 JM |
229 | pseudonym); |
230 | if (sqlite3_exec(data->sqlite_db, cmd, get_pseudonym_cb, data, NULL) != | |
231 | SQLITE_OK) | |
232 | return NULL; | |
e95ffe04 | 233 | if (data->db_tmp_identity[0] == '\0') |
66979bb8 | 234 | return NULL; |
e95ffe04 | 235 | return data->db_tmp_identity; |
66979bb8 JM |
236 | } |
237 | ||
238 | ||
61e181db JM |
239 | static int db_add_reauth(struct eap_sim_db_data *data, const char *permanent, |
240 | char *reauth_id, u16 counter, const u8 *mk, | |
241 | const u8 *k_encr, const u8 *k_aut, const u8 *k_re) | |
29813cfd JM |
242 | { |
243 | char cmd[2000], *pos, *end; | |
29813cfd JM |
244 | char *err = NULL; |
245 | ||
6d49d9ec | 246 | if (!valid_db_string(permanent) || !valid_db_string(reauth_id)) { |
29813cfd JM |
247 | os_free(reauth_id); |
248 | return -1; | |
249 | } | |
29813cfd JM |
250 | |
251 | pos = cmd; | |
252 | end = pos + sizeof(cmd); | |
253 | pos += os_snprintf(pos, end - pos, "INSERT OR REPLACE INTO reauth " | |
6d49d9ec JM |
254 | "(permanent, reauth_id, counter%s%s%s%s) " |
255 | "VALUES ('%s', '%s', %u", | |
29813cfd JM |
256 | mk ? ", mk" : "", |
257 | k_encr ? ", k_encr" : "", | |
258 | k_aut ? ", k_aut" : "", | |
259 | k_re ? ", k_re" : "", | |
6d49d9ec | 260 | permanent, reauth_id, counter); |
29813cfd JM |
261 | os_free(reauth_id); |
262 | ||
263 | if (mk) { | |
264 | pos += os_snprintf(pos, end - pos, ", '"); | |
265 | pos += wpa_snprintf_hex(pos, end - pos, mk, EAP_SIM_MK_LEN); | |
266 | pos += os_snprintf(pos, end - pos, "'"); | |
267 | } | |
268 | ||
269 | if (k_encr) { | |
270 | pos += os_snprintf(pos, end - pos, ", '"); | |
271 | pos += wpa_snprintf_hex(pos, end - pos, k_encr, | |
272 | EAP_SIM_K_ENCR_LEN); | |
273 | pos += os_snprintf(pos, end - pos, "'"); | |
274 | } | |
275 | ||
276 | if (k_aut) { | |
277 | pos += os_snprintf(pos, end - pos, ", '"); | |
278 | pos += wpa_snprintf_hex(pos, end - pos, k_aut, | |
279 | EAP_AKA_PRIME_K_AUT_LEN); | |
280 | pos += os_snprintf(pos, end - pos, "'"); | |
281 | } | |
282 | ||
283 | if (k_re) { | |
284 | pos += os_snprintf(pos, end - pos, ", '"); | |
285 | pos += wpa_snprintf_hex(pos, end - pos, k_re, | |
286 | EAP_AKA_PRIME_K_RE_LEN); | |
287 | pos += os_snprintf(pos, end - pos, "'"); | |
288 | } | |
289 | ||
290 | os_snprintf(pos, end - pos, ");"); | |
291 | ||
292 | if (sqlite3_exec(data->sqlite_db, cmd, NULL, NULL, &err) != SQLITE_OK) | |
293 | { | |
294 | wpa_printf(MSG_ERROR, "EAP-SIM DB: SQLite error: %s", err); | |
295 | sqlite3_free(err); | |
296 | return -1; | |
297 | } | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | ||
303 | static int get_reauth_cb(void *ctx, int argc, char *argv[], char *col[]) | |
304 | { | |
305 | struct eap_sim_db_data *data = ctx; | |
306 | int i; | |
29813cfd JM |
307 | struct eap_sim_reauth *reauth = &data->db_tmp_reauth; |
308 | ||
309 | for (i = 0; i < argc; i++) { | |
6d49d9ec | 310 | if (os_strcmp(col[i], "permanent") == 0 && argv[i]) { |
61e181db JM |
311 | os_strlcpy(data->db_tmp_identity, argv[i], |
312 | sizeof(data->db_tmp_identity)); | |
313 | reauth->permanent = data->db_tmp_identity; | |
29813cfd JM |
314 | } else if (os_strcmp(col[i], "counter") == 0 && argv[i]) { |
315 | reauth->counter = atoi(argv[i]); | |
29813cfd JM |
316 | } else if (os_strcmp(col[i], "mk") == 0 && argv[i]) { |
317 | hexstr2bin(argv[i], reauth->mk, sizeof(reauth->mk)); | |
318 | } else if (os_strcmp(col[i], "k_encr") == 0 && argv[i]) { | |
319 | hexstr2bin(argv[i], reauth->k_encr, | |
320 | sizeof(reauth->k_encr)); | |
321 | } else if (os_strcmp(col[i], "k_aut") == 0 && argv[i]) { | |
322 | hexstr2bin(argv[i], reauth->k_aut, | |
323 | sizeof(reauth->k_aut)); | |
324 | } else if (os_strcmp(col[i], "k_re") == 0 && argv[i]) { | |
325 | hexstr2bin(argv[i], reauth->k_re, | |
326 | sizeof(reauth->k_re)); | |
327 | } | |
328 | } | |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
333 | ||
334 | static struct eap_sim_reauth * | |
335 | db_get_reauth(struct eap_sim_db_data *data, const char *reauth_id) | |
336 | { | |
337 | char cmd[256]; | |
338 | ||
3961dffc | 339 | if (!valid_db_string(reauth_id)) |
29813cfd JM |
340 | return NULL; |
341 | os_memset(&data->db_tmp_reauth, 0, sizeof(data->db_tmp_reauth)); | |
342 | os_strlcpy(data->db_tmp_pseudonym_str, reauth_id, | |
343 | sizeof(data->db_tmp_pseudonym_str)); | |
344 | data->db_tmp_reauth.reauth_id = data->db_tmp_pseudonym_str; | |
345 | os_snprintf(cmd, sizeof(cmd), | |
346 | "SELECT * FROM reauth WHERE reauth_id='%s';", reauth_id); | |
347 | if (sqlite3_exec(data->sqlite_db, cmd, get_reauth_cb, data, NULL) != | |
348 | SQLITE_OK) | |
349 | return NULL; | |
61e181db | 350 | if (data->db_tmp_reauth.permanent == NULL) |
29813cfd JM |
351 | return NULL; |
352 | return &data->db_tmp_reauth; | |
353 | } | |
354 | ||
355 | ||
356 | static void db_remove_reauth(struct eap_sim_db_data *data, | |
357 | struct eap_sim_reauth *reauth) | |
358 | { | |
359 | char cmd[256]; | |
29813cfd | 360 | |
6d49d9ec JM |
361 | if (!valid_db_string(reauth->permanent)) |
362 | return; | |
29813cfd | 363 | os_snprintf(cmd, sizeof(cmd), |
6d49d9ec JM |
364 | "DELETE FROM reauth WHERE permanent='%s';", |
365 | reauth->permanent); | |
29813cfd JM |
366 | sqlite3_exec(data->sqlite_db, cmd, NULL, NULL, NULL); |
367 | } | |
368 | ||
66979bb8 JM |
369 | #endif /* CONFIG_SQLITE */ |
370 | ||
29813cfd | 371 | |
6fc6879b | 372 | static struct eap_sim_db_pending * |
61e181db | 373 | eap_sim_db_get_pending(struct eap_sim_db_data *data, const char *imsi, int aka) |
6fc6879b JM |
374 | { |
375 | struct eap_sim_db_pending *entry, *prev = NULL; | |
376 | ||
377 | entry = data->pending; | |
378 | while (entry) { | |
61e181db | 379 | if (entry->aka == aka && os_strcmp(entry->imsi, imsi) == 0) { |
6fc6879b JM |
380 | if (prev) |
381 | prev->next = entry->next; | |
382 | else | |
383 | data->pending = entry->next; | |
384 | break; | |
385 | } | |
386 | prev = entry; | |
387 | entry = entry->next; | |
388 | } | |
389 | return entry; | |
390 | } | |
391 | ||
392 | ||
393 | static void eap_sim_db_add_pending(struct eap_sim_db_data *data, | |
394 | struct eap_sim_db_pending *entry) | |
395 | { | |
396 | entry->next = data->pending; | |
397 | data->pending = entry; | |
398 | } | |
399 | ||
400 | ||
401 | static void eap_sim_db_sim_resp_auth(struct eap_sim_db_data *data, | |
402 | const char *imsi, char *buf) | |
403 | { | |
404 | char *start, *end, *pos; | |
405 | struct eap_sim_db_pending *entry; | |
406 | int num_chal; | |
407 | ||
408 | /* | |
409 | * SIM-RESP-AUTH <IMSI> Kc(i):SRES(i):RAND(i) ... | |
410 | * SIM-RESP-AUTH <IMSI> FAILURE | |
411 | * (IMSI = ASCII string, Kc/SRES/RAND = hex string) | |
412 | */ | |
413 | ||
61e181db | 414 | entry = eap_sim_db_get_pending(data, imsi, 0); |
6fc6879b JM |
415 | if (entry == NULL) { |
416 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: No pending entry for the " | |
417 | "received message found"); | |
418 | return; | |
419 | } | |
420 | ||
421 | start = buf; | |
422 | if (os_strncmp(start, "FAILURE", 7) == 0) { | |
423 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: External server reported " | |
424 | "failure"); | |
425 | entry->state = FAILURE; | |
426 | eap_sim_db_add_pending(data, entry); | |
427 | data->get_complete_cb(data->ctx, entry->cb_session_ctx); | |
428 | return; | |
429 | } | |
430 | ||
431 | num_chal = 0; | |
432 | while (num_chal < EAP_SIM_MAX_CHAL) { | |
433 | end = os_strchr(start, ' '); | |
434 | if (end) | |
435 | *end = '\0'; | |
436 | ||
437 | pos = os_strchr(start, ':'); | |
438 | if (pos == NULL) | |
439 | goto parse_fail; | |
440 | *pos = '\0'; | |
441 | if (hexstr2bin(start, entry->u.sim.kc[num_chal], | |
442 | EAP_SIM_KC_LEN)) | |
443 | goto parse_fail; | |
444 | ||
445 | start = pos + 1; | |
446 | pos = os_strchr(start, ':'); | |
447 | if (pos == NULL) | |
448 | goto parse_fail; | |
449 | *pos = '\0'; | |
450 | if (hexstr2bin(start, entry->u.sim.sres[num_chal], | |
451 | EAP_SIM_SRES_LEN)) | |
452 | goto parse_fail; | |
453 | ||
454 | start = pos + 1; | |
455 | if (hexstr2bin(start, entry->u.sim.rand[num_chal], | |
456 | GSM_RAND_LEN)) | |
457 | goto parse_fail; | |
458 | ||
459 | num_chal++; | |
460 | if (end == NULL) | |
461 | break; | |
462 | else | |
463 | start = end + 1; | |
464 | } | |
465 | entry->u.sim.num_chal = num_chal; | |
466 | ||
467 | entry->state = SUCCESS; | |
468 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Authentication data parsed " | |
469 | "successfully - callback"); | |
470 | eap_sim_db_add_pending(data, entry); | |
471 | data->get_complete_cb(data->ctx, entry->cb_session_ctx); | |
472 | return; | |
473 | ||
474 | parse_fail: | |
475 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Failed to parse response string"); | |
476 | os_free(entry); | |
477 | } | |
478 | ||
479 | ||
480 | static void eap_sim_db_aka_resp_auth(struct eap_sim_db_data *data, | |
481 | const char *imsi, char *buf) | |
482 | { | |
483 | char *start, *end; | |
484 | struct eap_sim_db_pending *entry; | |
485 | ||
486 | /* | |
487 | * AKA-RESP-AUTH <IMSI> <RAND> <AUTN> <IK> <CK> <RES> | |
488 | * AKA-RESP-AUTH <IMSI> FAILURE | |
489 | * (IMSI = ASCII string, RAND/AUTN/IK/CK/RES = hex string) | |
490 | */ | |
491 | ||
61e181db | 492 | entry = eap_sim_db_get_pending(data, imsi, 1); |
6fc6879b JM |
493 | if (entry == NULL) { |
494 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: No pending entry for the " | |
495 | "received message found"); | |
496 | return; | |
497 | } | |
498 | ||
499 | start = buf; | |
500 | if (os_strncmp(start, "FAILURE", 7) == 0) { | |
501 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: External server reported " | |
502 | "failure"); | |
503 | entry->state = FAILURE; | |
504 | eap_sim_db_add_pending(data, entry); | |
505 | data->get_complete_cb(data->ctx, entry->cb_session_ctx); | |
506 | return; | |
507 | } | |
508 | ||
509 | end = os_strchr(start, ' '); | |
510 | if (end == NULL) | |
511 | goto parse_fail; | |
512 | *end = '\0'; | |
513 | if (hexstr2bin(start, entry->u.aka.rand, EAP_AKA_RAND_LEN)) | |
514 | goto parse_fail; | |
515 | ||
516 | start = end + 1; | |
517 | end = os_strchr(start, ' '); | |
518 | if (end == NULL) | |
519 | goto parse_fail; | |
520 | *end = '\0'; | |
521 | if (hexstr2bin(start, entry->u.aka.autn, EAP_AKA_AUTN_LEN)) | |
522 | goto parse_fail; | |
523 | ||
524 | start = end + 1; | |
525 | end = os_strchr(start, ' '); | |
526 | if (end == NULL) | |
527 | goto parse_fail; | |
528 | *end = '\0'; | |
529 | if (hexstr2bin(start, entry->u.aka.ik, EAP_AKA_IK_LEN)) | |
530 | goto parse_fail; | |
531 | ||
532 | start = end + 1; | |
533 | end = os_strchr(start, ' '); | |
534 | if (end == NULL) | |
535 | goto parse_fail; | |
536 | *end = '\0'; | |
537 | if (hexstr2bin(start, entry->u.aka.ck, EAP_AKA_CK_LEN)) | |
538 | goto parse_fail; | |
539 | ||
540 | start = end + 1; | |
541 | end = os_strchr(start, ' '); | |
542 | if (end) | |
543 | *end = '\0'; | |
544 | else { | |
545 | end = start; | |
546 | while (*end) | |
547 | end++; | |
548 | } | |
549 | entry->u.aka.res_len = (end - start) / 2; | |
550 | if (entry->u.aka.res_len > EAP_AKA_RES_MAX_LEN) { | |
551 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Too long RES"); | |
552 | entry->u.aka.res_len = 0; | |
553 | goto parse_fail; | |
554 | } | |
555 | if (hexstr2bin(start, entry->u.aka.res, entry->u.aka.res_len)) | |
556 | goto parse_fail; | |
557 | ||
558 | entry->state = SUCCESS; | |
559 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Authentication data parsed " | |
560 | "successfully - callback"); | |
561 | eap_sim_db_add_pending(data, entry); | |
562 | data->get_complete_cb(data->ctx, entry->cb_session_ctx); | |
563 | return; | |
564 | ||
565 | parse_fail: | |
566 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Failed to parse response string"); | |
567 | os_free(entry); | |
568 | } | |
569 | ||
570 | ||
571 | static void eap_sim_db_receive(int sock, void *eloop_ctx, void *sock_ctx) | |
572 | { | |
573 | struct eap_sim_db_data *data = eloop_ctx; | |
574 | char buf[1000], *pos, *cmd, *imsi; | |
575 | int res; | |
576 | ||
577 | res = recv(sock, buf, sizeof(buf), 0); | |
578 | if (res < 0) | |
579 | return; | |
580 | wpa_hexdump_ascii_key(MSG_MSGDUMP, "EAP-SIM DB: Received from an " | |
581 | "external source", (u8 *) buf, res); | |
582 | if (res == 0) | |
583 | return; | |
584 | if (res >= (int) sizeof(buf)) | |
585 | res = sizeof(buf) - 1; | |
586 | buf[res] = '\0'; | |
587 | ||
588 | if (data->get_complete_cb == NULL) { | |
589 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: No get_complete_cb " | |
590 | "registered"); | |
591 | return; | |
592 | } | |
593 | ||
594 | /* <cmd> <IMSI> ... */ | |
595 | ||
596 | cmd = buf; | |
597 | pos = os_strchr(cmd, ' '); | |
598 | if (pos == NULL) | |
599 | goto parse_fail; | |
600 | *pos = '\0'; | |
601 | imsi = pos + 1; | |
602 | pos = os_strchr(imsi, ' '); | |
603 | if (pos == NULL) | |
604 | goto parse_fail; | |
605 | *pos = '\0'; | |
606 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: External response=%s for IMSI %s", | |
607 | cmd, imsi); | |
608 | ||
609 | if (os_strcmp(cmd, "SIM-RESP-AUTH") == 0) | |
610 | eap_sim_db_sim_resp_auth(data, imsi, pos + 1); | |
611 | else if (os_strcmp(cmd, "AKA-RESP-AUTH") == 0) | |
612 | eap_sim_db_aka_resp_auth(data, imsi, pos + 1); | |
613 | else | |
614 | wpa_printf(MSG_INFO, "EAP-SIM DB: Unknown external response " | |
615 | "'%s'", cmd); | |
616 | return; | |
617 | ||
618 | parse_fail: | |
619 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Failed to parse response string"); | |
620 | } | |
621 | ||
622 | ||
623 | static int eap_sim_db_open_socket(struct eap_sim_db_data *data) | |
624 | { | |
625 | struct sockaddr_un addr; | |
626 | static int counter = 0; | |
627 | ||
628 | if (os_strncmp(data->fname, "unix:", 5) != 0) | |
629 | return -1; | |
630 | ||
631 | data->sock = socket(PF_UNIX, SOCK_DGRAM, 0); | |
632 | if (data->sock < 0) { | |
633 | perror("socket(eap_sim_db)"); | |
634 | return -1; | |
635 | } | |
636 | ||
637 | os_memset(&addr, 0, sizeof(addr)); | |
638 | addr.sun_family = AF_UNIX; | |
639 | os_snprintf(addr.sun_path, sizeof(addr.sun_path), | |
640 | "/tmp/eap_sim_db_%d-%d", getpid(), counter++); | |
c13f0a3e | 641 | os_free(data->local_sock); |
6fc6879b JM |
642 | data->local_sock = os_strdup(addr.sun_path); |
643 | if (bind(data->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
644 | perror("bind(eap_sim_db)"); | |
645 | close(data->sock); | |
646 | data->sock = -1; | |
647 | return -1; | |
648 | } | |
649 | ||
650 | os_memset(&addr, 0, sizeof(addr)); | |
651 | addr.sun_family = AF_UNIX; | |
652 | os_strlcpy(addr.sun_path, data->fname + 5, sizeof(addr.sun_path)); | |
653 | if (connect(data->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
654 | perror("connect(eap_sim_db)"); | |
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 | */ | |
691 | void * eap_sim_db_init(const char *config, | |
692 | void (*get_complete_cb)(void *ctx, void *session_ctx), | |
693 | void *ctx) | |
694 | { | |
695 | struct eap_sim_db_data *data; | |
66979bb8 | 696 | char *pos; |
6fc6879b JM |
697 | |
698 | data = os_zalloc(sizeof(*data)); | |
699 | if (data == NULL) | |
700 | return NULL; | |
701 | ||
702 | data->sock = -1; | |
703 | data->get_complete_cb = get_complete_cb; | |
704 | data->ctx = ctx; | |
705 | data->fname = os_strdup(config); | |
706 | if (data->fname == NULL) | |
707 | goto fail; | |
66979bb8 JM |
708 | pos = os_strstr(data->fname, " db="); |
709 | if (pos) { | |
710 | *pos = '\0'; | |
711 | #ifdef CONFIG_SQLITE | |
712 | pos += 4; | |
713 | data->sqlite_db = db_open(pos); | |
714 | if (data->sqlite_db == NULL) | |
715 | goto fail; | |
716 | #endif /* CONFIG_SQLITE */ | |
717 | } | |
6fc6879b JM |
718 | |
719 | if (os_strncmp(data->fname, "unix:", 5) == 0) { | |
704b8762 JM |
720 | if (eap_sim_db_open_socket(data)) { |
721 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: External database " | |
722 | "connection not available - will retry " | |
723 | "later"); | |
724 | } | |
6fc6879b JM |
725 | } |
726 | ||
727 | return data; | |
728 | ||
729 | fail: | |
730 | eap_sim_db_close_socket(data); | |
731 | os_free(data->fname); | |
732 | os_free(data); | |
733 | return NULL; | |
734 | } | |
735 | ||
736 | ||
737 | static void eap_sim_db_free_pseudonym(struct eap_sim_pseudonym *p) | |
738 | { | |
61e181db | 739 | os_free(p->permanent); |
6fc6879b JM |
740 | os_free(p->pseudonym); |
741 | os_free(p); | |
742 | } | |
743 | ||
744 | ||
745 | static void eap_sim_db_free_reauth(struct eap_sim_reauth *r) | |
746 | { | |
61e181db | 747 | os_free(r->permanent); |
6fc6879b JM |
748 | os_free(r->reauth_id); |
749 | os_free(r); | |
750 | } | |
751 | ||
752 | ||
753 | /** | |
754 | * eap_sim_db_deinit - Deinitialize EAP-SIM DB/authentication gw interface | |
755 | * @priv: Private data pointer from eap_sim_db_init() | |
756 | */ | |
757 | void eap_sim_db_deinit(void *priv) | |
758 | { | |
759 | struct eap_sim_db_data *data = priv; | |
760 | struct eap_sim_pseudonym *p, *prev; | |
761 | struct eap_sim_reauth *r, *prevr; | |
762 | struct eap_sim_db_pending *pending, *prev_pending; | |
763 | ||
66979bb8 JM |
764 | #ifdef CONFIG_SQLITE |
765 | if (data->sqlite_db) { | |
766 | sqlite3_close(data->sqlite_db); | |
767 | data->sqlite_db = NULL; | |
768 | } | |
769 | #endif /* CONFIG_SQLITE */ | |
770 | ||
6fc6879b JM |
771 | eap_sim_db_close_socket(data); |
772 | os_free(data->fname); | |
773 | ||
774 | p = data->pseudonyms; | |
775 | while (p) { | |
776 | prev = p; | |
777 | p = p->next; | |
778 | eap_sim_db_free_pseudonym(prev); | |
779 | } | |
780 | ||
781 | r = data->reauths; | |
782 | while (r) { | |
783 | prevr = r; | |
784 | r = r->next; | |
785 | eap_sim_db_free_reauth(prevr); | |
786 | } | |
787 | ||
788 | pending = data->pending; | |
789 | while (pending) { | |
790 | prev_pending = pending; | |
791 | pending = pending->next; | |
792 | os_free(prev_pending); | |
793 | } | |
794 | ||
795 | os_free(data); | |
796 | } | |
797 | ||
798 | ||
799 | static int eap_sim_db_send(struct eap_sim_db_data *data, const char *msg, | |
800 | size_t len) | |
801 | { | |
802 | int _errno = 0; | |
803 | ||
804 | if (send(data->sock, msg, len, 0) < 0) { | |
805 | _errno = errno; | |
806 | perror("send[EAP-SIM DB UNIX]"); | |
807 | } | |
808 | ||
809 | if (_errno == ENOTCONN || _errno == EDESTADDRREQ || _errno == EINVAL || | |
810 | _errno == ECONNREFUSED) { | |
811 | /* Try to reconnect */ | |
812 | eap_sim_db_close_socket(data); | |
813 | if (eap_sim_db_open_socket(data) < 0) | |
814 | return -1; | |
815 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Reconnected to the " | |
816 | "external server"); | |
817 | if (send(data->sock, msg, len, 0) < 0) { | |
818 | perror("send[EAP-SIM DB UNIX]"); | |
819 | return -1; | |
820 | } | |
821 | } | |
822 | ||
823 | return 0; | |
824 | } | |
825 | ||
826 | ||
827 | static void eap_sim_db_expire_pending(struct eap_sim_db_data *data) | |
828 | { | |
829 | /* TODO: add limit for maximum length for pending list; remove latest | |
830 | * (i.e., last) entry from the list if the limit is reached; could also | |
831 | * use timeout to expire pending entries */ | |
832 | } | |
833 | ||
834 | ||
835 | /** | |
836 | * eap_sim_db_get_gsm_triplets - Get GSM triplets | |
837 | * @priv: Private data pointer from eap_sim_db_init() | |
61e181db | 838 | * @username: Permanent username (prefix | IMSI) |
6fc6879b JM |
839 | * @max_chal: Maximum number of triplets |
840 | * @_rand: Buffer for RAND values | |
841 | * @kc: Buffer for Kc values | |
842 | * @sres: Buffer for SRES values | |
843 | * @cb_session_ctx: Session callback context for get_complete_cb() | |
844 | * Returns: Number of triplets received (has to be less than or equal to | |
845 | * max_chal), -1 (EAP_SIM_DB_FAILURE) on error (e.g., user not found), or | |
846 | * -2 (EAP_SIM_DB_PENDING) if results are not yet available. In this case, the | |
847 | * callback function registered with eap_sim_db_init() will be called once the | |
848 | * results become available. | |
849 | * | |
6fc6879b JM |
850 | * When using an external server for GSM triplets, this function can always |
851 | * start a request and return EAP_SIM_DB_PENDING immediately if authentication | |
852 | * triplets are not available. Once the triplets are received, callback | |
853 | * function registered with eap_sim_db_init() is called to notify EAP state | |
854 | * machine to reprocess the message. This eap_sim_db_get_gsm_triplets() | |
855 | * function will then be called again and the newly received triplets will then | |
856 | * be given to the caller. | |
857 | */ | |
61e181db | 858 | int eap_sim_db_get_gsm_triplets(void *priv, const char *username, int max_chal, |
6fc6879b JM |
859 | u8 *_rand, u8 *kc, u8 *sres, |
860 | void *cb_session_ctx) | |
861 | { | |
862 | struct eap_sim_db_data *data = priv; | |
863 | struct eap_sim_db_pending *entry; | |
864 | int len, ret; | |
6fc6879b | 865 | char msg[40]; |
61e181db JM |
866 | const char *imsi; |
867 | size_t imsi_len; | |
6fc6879b | 868 | |
61e181db JM |
869 | if (username == NULL || username[0] != EAP_SIM_PERMANENT_PREFIX || |
870 | username[1] == '\0' || os_strlen(username) > sizeof(entry->imsi)) { | |
871 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: unexpected username '%s'", | |
872 | username); | |
6fc6879b JM |
873 | return EAP_SIM_DB_FAILURE; |
874 | } | |
61e181db JM |
875 | imsi = username + 1; |
876 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Get GSM triplets for IMSI '%s'", | |
877 | imsi); | |
6fc6879b | 878 | |
61e181db | 879 | entry = eap_sim_db_get_pending(data, imsi, 0); |
6fc6879b JM |
880 | if (entry) { |
881 | int num_chal; | |
882 | if (entry->state == FAILURE) { | |
883 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Pending entry -> " | |
884 | "failure"); | |
885 | os_free(entry); | |
886 | return EAP_SIM_DB_FAILURE; | |
887 | } | |
888 | ||
889 | if (entry->state == PENDING) { | |
890 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Pending entry -> " | |
891 | "still pending"); | |
892 | eap_sim_db_add_pending(data, entry); | |
893 | return EAP_SIM_DB_PENDING; | |
894 | } | |
895 | ||
896 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Pending entry -> " | |
897 | "%d challenges", entry->u.sim.num_chal); | |
898 | num_chal = entry->u.sim.num_chal; | |
899 | if (num_chal > max_chal) | |
900 | num_chal = max_chal; | |
901 | os_memcpy(_rand, entry->u.sim.rand, num_chal * GSM_RAND_LEN); | |
902 | os_memcpy(sres, entry->u.sim.sres, | |
903 | num_chal * EAP_SIM_SRES_LEN); | |
904 | os_memcpy(kc, entry->u.sim.kc, num_chal * EAP_SIM_KC_LEN); | |
905 | os_free(entry); | |
906 | return num_chal; | |
907 | } | |
908 | ||
909 | if (data->sock < 0) { | |
910 | if (eap_sim_db_open_socket(data) < 0) | |
911 | return EAP_SIM_DB_FAILURE; | |
912 | } | |
913 | ||
61e181db | 914 | imsi_len = os_strlen(imsi); |
6fc6879b | 915 | len = os_snprintf(msg, sizeof(msg), "SIM-REQ-AUTH "); |
61e181db | 916 | if (len < 0 || len + imsi_len >= sizeof(msg)) |
6fc6879b | 917 | return EAP_SIM_DB_FAILURE; |
61e181db JM |
918 | os_memcpy(msg + len, imsi, imsi_len); |
919 | len += imsi_len; | |
6fc6879b JM |
920 | ret = os_snprintf(msg + len, sizeof(msg) - len, " %d", max_chal); |
921 | if (ret < 0 || (size_t) ret >= sizeof(msg) - len) | |
922 | return EAP_SIM_DB_FAILURE; | |
923 | len += ret; | |
924 | ||
61e181db JM |
925 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: requesting SIM authentication " |
926 | "data for IMSI '%s'", imsi); | |
6fc6879b JM |
927 | if (eap_sim_db_send(data, msg, len) < 0) |
928 | return EAP_SIM_DB_FAILURE; | |
929 | ||
930 | entry = os_zalloc(sizeof(*entry)); | |
931 | if (entry == NULL) | |
932 | return EAP_SIM_DB_FAILURE; | |
933 | ||
934 | os_get_time(&entry->timestamp); | |
61e181db | 935 | os_strlcpy(entry->imsi, imsi, sizeof(entry->imsi)); |
6fc6879b JM |
936 | entry->cb_session_ctx = cb_session_ctx; |
937 | entry->state = PENDING; | |
938 | eap_sim_db_add_pending(data, entry); | |
939 | eap_sim_db_expire_pending(data); | |
940 | ||
941 | return EAP_SIM_DB_PENDING; | |
942 | } | |
943 | ||
944 | ||
6fc6879b JM |
945 | static char * eap_sim_db_get_next(struct eap_sim_db_data *data, char prefix) |
946 | { | |
947 | char *id, *pos, *end; | |
948 | u8 buf[10]; | |
949 | ||
3642c431 | 950 | if (random_get_bytes(buf, sizeof(buf))) |
6fc6879b JM |
951 | return NULL; |
952 | id = os_malloc(sizeof(buf) * 2 + 2); | |
953 | if (id == NULL) | |
954 | return NULL; | |
955 | ||
956 | pos = id; | |
957 | end = id + sizeof(buf) * 2 + 2; | |
958 | *pos++ = prefix; | |
959 | pos += wpa_snprintf_hex(pos, end - pos, buf, sizeof(buf)); | |
960 | ||
961 | return id; | |
962 | } | |
963 | ||
964 | ||
965 | /** | |
966 | * eap_sim_db_get_next_pseudonym - EAP-SIM DB: Get next pseudonym | |
967 | * @priv: Private data pointer from eap_sim_db_init() | |
762e4ce6 | 968 | * @method: EAP method (SIM/AKA/AKA') |
6fc6879b JM |
969 | * Returns: Next pseudonym (allocated string) or %NULL on failure |
970 | * | |
971 | * This function is used to generate a pseudonym for EAP-SIM. The returned | |
972 | * pseudonym is not added to database at this point; it will need to be added | |
973 | * with eap_sim_db_add_pseudonym() once the authentication has been completed | |
974 | * successfully. Caller is responsible for freeing the returned buffer. | |
975 | */ | |
762e4ce6 | 976 | char * eap_sim_db_get_next_pseudonym(void *priv, enum eap_sim_db_method method) |
6fc6879b JM |
977 | { |
978 | struct eap_sim_db_data *data = priv; | |
762e4ce6 JM |
979 | char prefix = EAP_SIM_REAUTH_ID_PREFIX; |
980 | ||
981 | switch (method) { | |
982 | case EAP_SIM_DB_SIM: | |
983 | prefix = EAP_SIM_PSEUDONYM_PREFIX; | |
984 | break; | |
985 | case EAP_SIM_DB_AKA: | |
986 | prefix = EAP_AKA_PSEUDONYM_PREFIX; | |
987 | break; | |
988 | case EAP_SIM_DB_AKA_PRIME: | |
989 | prefix = EAP_AKA_PRIME_PSEUDONYM_PREFIX; | |
990 | break; | |
991 | } | |
992 | ||
993 | return eap_sim_db_get_next(data, prefix); | |
6fc6879b JM |
994 | } |
995 | ||
996 | ||
997 | /** | |
998 | * eap_sim_db_get_next_reauth_id - EAP-SIM DB: Get next reauth_id | |
999 | * @priv: Private data pointer from eap_sim_db_init() | |
762e4ce6 | 1000 | * @method: EAP method (SIM/AKA/AKA') |
6fc6879b JM |
1001 | * Returns: Next reauth_id (allocated string) or %NULL on failure |
1002 | * | |
1003 | * This function is used to generate a fast re-authentication identity for | |
1004 | * EAP-SIM. The returned reauth_id is not added to database at this point; it | |
1005 | * will need to be added with eap_sim_db_add_reauth() once the authentication | |
1006 | * has been completed successfully. Caller is responsible for freeing the | |
1007 | * returned buffer. | |
1008 | */ | |
762e4ce6 | 1009 | char * eap_sim_db_get_next_reauth_id(void *priv, enum eap_sim_db_method method) |
6fc6879b JM |
1010 | { |
1011 | struct eap_sim_db_data *data = priv; | |
762e4ce6 JM |
1012 | char prefix = EAP_SIM_REAUTH_ID_PREFIX; |
1013 | ||
1014 | switch (method) { | |
1015 | case EAP_SIM_DB_SIM: | |
1016 | prefix = EAP_SIM_REAUTH_ID_PREFIX; | |
1017 | break; | |
1018 | case EAP_SIM_DB_AKA: | |
1019 | prefix = EAP_AKA_REAUTH_ID_PREFIX; | |
1020 | break; | |
1021 | case EAP_SIM_DB_AKA_PRIME: | |
1022 | prefix = EAP_AKA_PRIME_REAUTH_ID_PREFIX; | |
1023 | break; | |
1024 | } | |
1025 | ||
1026 | return eap_sim_db_get_next(data, prefix); | |
6fc6879b JM |
1027 | } |
1028 | ||
1029 | ||
1030 | /** | |
1031 | * eap_sim_db_add_pseudonym - EAP-SIM DB: Add new pseudonym | |
1032 | * @priv: Private data pointer from eap_sim_db_init() | |
61e181db | 1033 | * @permanent: Permanent username |
6fc6879b JM |
1034 | * @pseudonym: Pseudonym for this user. This needs to be an allocated buffer, |
1035 | * e.g., return value from eap_sim_db_get_next_pseudonym(). Caller must not | |
1036 | * free it. | |
1037 | * Returns: 0 on success, -1 on failure | |
1038 | * | |
1039 | * This function adds a new pseudonym for EAP-SIM user. EAP-SIM DB is | |
1040 | * responsible of freeing pseudonym buffer once it is not needed anymore. | |
1041 | */ | |
61e181db JM |
1042 | int eap_sim_db_add_pseudonym(void *priv, const char *permanent, |
1043 | char *pseudonym) | |
6fc6879b JM |
1044 | { |
1045 | struct eap_sim_db_data *data = priv; | |
1046 | struct eap_sim_pseudonym *p; | |
61e181db JM |
1047 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Add pseudonym '%s' for permanent " |
1048 | "username '%s'", pseudonym, permanent); | |
6fc6879b JM |
1049 | |
1050 | /* TODO: could store last two pseudonyms */ | |
66979bb8 JM |
1051 | #ifdef CONFIG_SQLITE |
1052 | if (data->sqlite_db) | |
61e181db | 1053 | return db_add_pseudonym(data, permanent, pseudonym); |
66979bb8 | 1054 | #endif /* CONFIG_SQLITE */ |
61e181db JM |
1055 | for (p = data->pseudonyms; p; p = p->next) { |
1056 | if (os_strcmp(permanent, p->permanent) == 0) | |
1057 | break; | |
1058 | } | |
6fc6879b JM |
1059 | if (p) { |
1060 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Replacing previous " | |
1061 | "pseudonym: %s", p->pseudonym); | |
1062 | os_free(p->pseudonym); | |
1063 | p->pseudonym = pseudonym; | |
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | p = os_zalloc(sizeof(*p)); | |
1068 | if (p == NULL) { | |
1069 | os_free(pseudonym); | |
1070 | return -1; | |
1071 | } | |
1072 | ||
1073 | p->next = data->pseudonyms; | |
61e181db JM |
1074 | p->permanent = os_strdup(permanent); |
1075 | if (p->permanent == NULL) { | |
6fc6879b JM |
1076 | os_free(p); |
1077 | os_free(pseudonym); | |
1078 | return -1; | |
1079 | } | |
6fc6879b JM |
1080 | p->pseudonym = pseudonym; |
1081 | data->pseudonyms = p; | |
1082 | ||
1083 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Added new pseudonym entry"); | |
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | ||
9881795e | 1088 | static struct eap_sim_reauth * |
61e181db JM |
1089 | eap_sim_db_add_reauth_data(struct eap_sim_db_data *data, |
1090 | const char *permanent, | |
1091 | char *reauth_id, u16 counter) | |
6fc6879b | 1092 | { |
6fc6879b | 1093 | struct eap_sim_reauth *r; |
9881795e | 1094 | |
61e181db JM |
1095 | for (r = data->reauths; r; r = r->next) { |
1096 | if (os_strcmp(r->permanent, permanent) == 0) | |
1097 | break; | |
1098 | } | |
6fc6879b JM |
1099 | |
1100 | if (r) { | |
1101 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Replacing previous " | |
1102 | "reauth_id: %s", r->reauth_id); | |
1103 | os_free(r->reauth_id); | |
1104 | r->reauth_id = reauth_id; | |
1105 | } else { | |
1106 | r = os_zalloc(sizeof(*r)); | |
1107 | if (r == NULL) { | |
1108 | os_free(reauth_id); | |
9881795e | 1109 | return NULL; |
6fc6879b JM |
1110 | } |
1111 | ||
1112 | r->next = data->reauths; | |
61e181db JM |
1113 | r->permanent = os_strdup(permanent); |
1114 | if (r->permanent == NULL) { | |
6fc6879b JM |
1115 | os_free(r); |
1116 | os_free(reauth_id); | |
9881795e | 1117 | return NULL; |
6fc6879b | 1118 | } |
6fc6879b JM |
1119 | r->reauth_id = reauth_id; |
1120 | data->reauths = r; | |
1121 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Added new reauth entry"); | |
1122 | } | |
1123 | ||
1124 | r->counter = counter; | |
9881795e JM |
1125 | |
1126 | return r; | |
1127 | } | |
1128 | ||
1129 | ||
1130 | /** | |
1131 | * eap_sim_db_add_reauth - EAP-SIM DB: Add new re-authentication entry | |
1132 | * @priv: Private data pointer from eap_sim_db_init() | |
61e181db | 1133 | * @permanent: Permanent username |
9881795e JM |
1134 | * @identity_len: Length of identity |
1135 | * @reauth_id: reauth_id for this user. This needs to be an allocated buffer, | |
1136 | * e.g., return value from eap_sim_db_get_next_reauth_id(). Caller must not | |
1137 | * free it. | |
a17df5fb | 1138 | * @counter: AT_COUNTER value for fast re-authentication |
9881795e JM |
1139 | * @mk: 16-byte MK from the previous full authentication or %NULL |
1140 | * Returns: 0 on success, -1 on failure | |
1141 | * | |
1142 | * This function adds a new re-authentication entry for an EAP-SIM user. | |
1143 | * EAP-SIM DB is responsible of freeing reauth_id buffer once it is not needed | |
1144 | * anymore. | |
1145 | */ | |
61e181db JM |
1146 | int eap_sim_db_add_reauth(void *priv, const char *permanent, char *reauth_id, |
1147 | u16 counter, const u8 *mk) | |
9881795e JM |
1148 | { |
1149 | struct eap_sim_db_data *data = priv; | |
1150 | struct eap_sim_reauth *r; | |
1151 | ||
29813cfd JM |
1152 | #ifdef CONFIG_SQLITE |
1153 | if (data->sqlite_db) | |
61e181db JM |
1154 | return db_add_reauth(data, permanent, reauth_id, counter, mk, |
1155 | NULL, NULL, NULL); | |
29813cfd | 1156 | #endif /* CONFIG_SQLITE */ |
61e181db | 1157 | r = eap_sim_db_add_reauth_data(data, permanent, reauth_id, counter); |
9881795e JM |
1158 | if (r == NULL) |
1159 | return -1; | |
1160 | ||
6fc6879b | 1161 | os_memcpy(r->mk, mk, EAP_SIM_MK_LEN); |
9881795e JM |
1162 | |
1163 | return 0; | |
1164 | } | |
1165 | ||
1166 | ||
1e5839e0 | 1167 | #ifdef EAP_SERVER_AKA_PRIME |
9881795e JM |
1168 | /** |
1169 | * eap_sim_db_add_reauth_prime - EAP-AKA' DB: Add new re-authentication entry | |
1170 | * @priv: Private data pointer from eap_sim_db_init() | |
61e181db | 1171 | * @permanent: Permanent username |
9881795e JM |
1172 | * @reauth_id: reauth_id for this user. This needs to be an allocated buffer, |
1173 | * e.g., return value from eap_sim_db_get_next_reauth_id(). Caller must not | |
1174 | * free it. | |
a17df5fb JM |
1175 | * @counter: AT_COUNTER value for fast re-authentication |
1176 | * @k_encr: K_encr from the previous full authentication | |
1177 | * @k_aut: K_aut from the previous full authentication | |
1178 | * @k_re: 32-byte K_re from the previous full authentication | |
9881795e JM |
1179 | * Returns: 0 on success, -1 on failure |
1180 | * | |
1181 | * This function adds a new re-authentication entry for an EAP-AKA' user. | |
1182 | * EAP-SIM DB is responsible of freeing reauth_id buffer once it is not needed | |
1183 | * anymore. | |
1184 | */ | |
61e181db JM |
1185 | int eap_sim_db_add_reauth_prime(void *priv, const char *permanent, |
1186 | char *reauth_id, u16 counter, const u8 *k_encr, | |
1187 | const u8 *k_aut, const u8 *k_re) | |
9881795e JM |
1188 | { |
1189 | struct eap_sim_db_data *data = priv; | |
1190 | struct eap_sim_reauth *r; | |
1191 | ||
61e181db JM |
1192 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Add reauth_id '%s' for permanent " |
1193 | "identity '%s'", reauth_id, permanent); | |
1194 | ||
29813cfd JM |
1195 | #ifdef CONFIG_SQLITE |
1196 | if (data->sqlite_db) | |
61e181db | 1197 | return db_add_reauth(data, permanent, reauth_id, counter, NULL, |
29813cfd JM |
1198 | k_encr, k_aut, k_re); |
1199 | #endif /* CONFIG_SQLITE */ | |
61e181db | 1200 | r = eap_sim_db_add_reauth_data(data, permanent, reauth_id, counter); |
9881795e JM |
1201 | if (r == NULL) |
1202 | return -1; | |
1203 | ||
9881795e JM |
1204 | os_memcpy(r->k_encr, k_encr, EAP_SIM_K_ENCR_LEN); |
1205 | os_memcpy(r->k_aut, k_aut, EAP_AKA_PRIME_K_AUT_LEN); | |
1206 | os_memcpy(r->k_re, k_re, EAP_AKA_PRIME_K_RE_LEN); | |
6fc6879b JM |
1207 | |
1208 | return 0; | |
1209 | } | |
1e5839e0 | 1210 | #endif /* EAP_SERVER_AKA_PRIME */ |
6fc6879b JM |
1211 | |
1212 | ||
1213 | /** | |
1214 | * eap_sim_db_get_permanent - EAP-SIM DB: Get permanent identity | |
1215 | * @priv: Private data pointer from eap_sim_db_init() | |
61e181db JM |
1216 | * @pseudonym: Pseudonym username |
1217 | * Returns: Pointer to permanent username or %NULL if not found | |
6fc6879b | 1218 | */ |
61e181db | 1219 | const char * eap_sim_db_get_permanent(void *priv, const char *pseudonym) |
6fc6879b JM |
1220 | { |
1221 | struct eap_sim_db_data *data = priv; | |
3e43a8ec | 1222 | struct eap_sim_pseudonym *p; |
6fc6879b | 1223 | |
3e43a8ec JM |
1224 | if (pseudonym[0] != EAP_SIM_PSEUDONYM_PREFIX && |
1225 | pseudonym[0] != EAP_AKA_PSEUDONYM_PREFIX && | |
1226 | pseudonym[0] != EAP_AKA_PRIME_PSEUDONYM_PREFIX) | |
6fc6879b JM |
1227 | return NULL; |
1228 | ||
3e43a8ec JM |
1229 | #ifdef CONFIG_SQLITE |
1230 | if (data->sqlite_db) | |
1231 | return db_get_pseudonym(data, pseudonym); | |
1232 | #endif /* CONFIG_SQLITE */ | |
1233 | ||
1234 | p = data->pseudonyms; | |
1235 | while (p) { | |
1236 | if (os_strcmp(p->pseudonym, pseudonym) == 0) | |
1237 | return p->permanent; | |
1238 | p = p->next; | |
1239 | } | |
1240 | ||
1241 | return NULL; | |
6fc6879b JM |
1242 | } |
1243 | ||
1244 | ||
1245 | /** | |
1246 | * eap_sim_db_get_reauth_entry - EAP-SIM DB: Get re-authentication entry | |
1247 | * @priv: Private data pointer from eap_sim_db_init() | |
61e181db | 1248 | * @reauth_id: Fast re-authentication username |
6fc6879b JM |
1249 | * Returns: Pointer to the re-auth entry, or %NULL if not found |
1250 | */ | |
1251 | struct eap_sim_reauth * | |
61e181db | 1252 | eap_sim_db_get_reauth_entry(void *priv, const char *reauth_id) |
6fc6879b JM |
1253 | { |
1254 | struct eap_sim_db_data *data = priv; | |
1255 | struct eap_sim_reauth *r; | |
1256 | ||
3e43a8ec JM |
1257 | if (reauth_id[0] != EAP_SIM_REAUTH_ID_PREFIX && |
1258 | reauth_id[0] != EAP_AKA_REAUTH_ID_PREFIX && | |
1259 | reauth_id[0] != EAP_AKA_PRIME_REAUTH_ID_PREFIX) | |
6fc6879b | 1260 | return NULL; |
3e43a8ec JM |
1261 | |
1262 | #ifdef CONFIG_SQLITE | |
1263 | if (data->sqlite_db) | |
1264 | return db_get_reauth(data, reauth_id); | |
1265 | #endif /* CONFIG_SQLITE */ | |
1266 | ||
1267 | r = data->reauths; | |
1268 | while (r) { | |
1269 | if (os_strcmp(r->reauth_id, reauth_id) == 0) | |
1270 | break; | |
1271 | r = r->next; | |
1272 | } | |
1273 | ||
6fc6879b JM |
1274 | return r; |
1275 | } | |
1276 | ||
1277 | ||
1278 | /** | |
1279 | * eap_sim_db_remove_reauth - EAP-SIM DB: Remove re-authentication entry | |
1280 | * @priv: Private data pointer from eap_sim_db_init() | |
1281 | * @reauth: Pointer to re-authentication entry from | |
1282 | * eap_sim_db_get_reauth_entry() | |
1283 | */ | |
1284 | void eap_sim_db_remove_reauth(void *priv, struct eap_sim_reauth *reauth) | |
1285 | { | |
1286 | struct eap_sim_db_data *data = priv; | |
1287 | struct eap_sim_reauth *r, *prev = NULL; | |
29813cfd JM |
1288 | #ifdef CONFIG_SQLITE |
1289 | if (data->sqlite_db) { | |
1290 | db_remove_reauth(data, reauth); | |
1291 | return; | |
1292 | } | |
1293 | #endif /* CONFIG_SQLITE */ | |
6fc6879b JM |
1294 | r = data->reauths; |
1295 | while (r) { | |
1296 | if (r == reauth) { | |
1297 | if (prev) | |
1298 | prev->next = r->next; | |
1299 | else | |
1300 | data->reauths = r->next; | |
1301 | eap_sim_db_free_reauth(r); | |
1302 | return; | |
1303 | } | |
1304 | prev = r; | |
1305 | r = r->next; | |
1306 | } | |
1307 | } | |
1308 | ||
1309 | ||
1310 | /** | |
1311 | * eap_sim_db_get_aka_auth - Get AKA authentication values | |
1312 | * @priv: Private data pointer from eap_sim_db_init() | |
61e181db | 1313 | * @username: Permanent username (prefix | IMSI) |
6fc6879b JM |
1314 | * @_rand: Buffer for RAND value |
1315 | * @autn: Buffer for AUTN value | |
1316 | * @ik: Buffer for IK value | |
1317 | * @ck: Buffer for CK value | |
1318 | * @res: Buffer for RES value | |
1319 | * @res_len: Buffer for RES length | |
1320 | * @cb_session_ctx: Session callback context for get_complete_cb() | |
1321 | * Returns: 0 on success, -1 (EAP_SIM_DB_FAILURE) on error (e.g., user not | |
1322 | * found), or -2 (EAP_SIM_DB_PENDING) if results are not yet available. In this | |
1323 | * case, the callback function registered with eap_sim_db_init() will be | |
1324 | * called once the results become available. | |
1325 | * | |
6fc6879b JM |
1326 | * When using an external server for AKA authentication, this function can |
1327 | * always start a request and return EAP_SIM_DB_PENDING immediately if | |
1328 | * authentication triplets are not available. Once the authentication data are | |
1329 | * received, callback function registered with eap_sim_db_init() is called to | |
1330 | * notify EAP state machine to reprocess the message. This | |
1331 | * eap_sim_db_get_aka_auth() function will then be called again and the newly | |
1332 | * received triplets will then be given to the caller. | |
1333 | */ | |
61e181db JM |
1334 | int eap_sim_db_get_aka_auth(void *priv, const char *username, u8 *_rand, |
1335 | u8 *autn, u8 *ik, u8 *ck, u8 *res, size_t *res_len, | |
6fc6879b JM |
1336 | void *cb_session_ctx) |
1337 | { | |
1338 | struct eap_sim_db_data *data = priv; | |
1339 | struct eap_sim_db_pending *entry; | |
1340 | int len; | |
6fc6879b | 1341 | char msg[40]; |
61e181db JM |
1342 | const char *imsi; |
1343 | size_t imsi_len; | |
6fc6879b | 1344 | |
61e181db JM |
1345 | if (username == NULL || |
1346 | (username[0] != EAP_AKA_PERMANENT_PREFIX && | |
1347 | username[0] != EAP_AKA_PRIME_PERMANENT_PREFIX) || | |
1348 | username[1] == '\0' || os_strlen(username) > sizeof(entry->imsi)) { | |
1349 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: unexpected username '%s'", | |
1350 | username); | |
6fc6879b JM |
1351 | return EAP_SIM_DB_FAILURE; |
1352 | } | |
61e181db JM |
1353 | imsi = username + 1; |
1354 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Get AKA auth for IMSI '%s'", | |
1355 | imsi); | |
6fc6879b | 1356 | |
61e181db | 1357 | entry = eap_sim_db_get_pending(data, imsi, 1); |
6fc6879b JM |
1358 | if (entry) { |
1359 | if (entry->state == FAILURE) { | |
1360 | os_free(entry); | |
1361 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Failure"); | |
1362 | return EAP_SIM_DB_FAILURE; | |
1363 | } | |
1364 | ||
1365 | if (entry->state == PENDING) { | |
1366 | eap_sim_db_add_pending(data, entry); | |
1367 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Pending"); | |
1368 | return EAP_SIM_DB_PENDING; | |
1369 | } | |
1370 | ||
1371 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Returning successfully " | |
1372 | "received authentication data"); | |
1373 | os_memcpy(_rand, entry->u.aka.rand, EAP_AKA_RAND_LEN); | |
1374 | os_memcpy(autn, entry->u.aka.autn, EAP_AKA_AUTN_LEN); | |
1375 | os_memcpy(ik, entry->u.aka.ik, EAP_AKA_IK_LEN); | |
1376 | os_memcpy(ck, entry->u.aka.ck, EAP_AKA_CK_LEN); | |
1377 | os_memcpy(res, entry->u.aka.res, EAP_AKA_RES_MAX_LEN); | |
1378 | *res_len = entry->u.aka.res_len; | |
1379 | os_free(entry); | |
1380 | return 0; | |
1381 | } | |
1382 | ||
1383 | if (data->sock < 0) { | |
1384 | if (eap_sim_db_open_socket(data) < 0) | |
1385 | return EAP_SIM_DB_FAILURE; | |
1386 | } | |
1387 | ||
61e181db | 1388 | imsi_len = os_strlen(imsi); |
6fc6879b | 1389 | len = os_snprintf(msg, sizeof(msg), "AKA-REQ-AUTH "); |
61e181db | 1390 | if (len < 0 || len + imsi_len >= sizeof(msg)) |
6fc6879b | 1391 | return EAP_SIM_DB_FAILURE; |
61e181db JM |
1392 | os_memcpy(msg + len, imsi, imsi_len); |
1393 | len += imsi_len; | |
6fc6879b | 1394 | |
61e181db JM |
1395 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: requesting AKA authentication " |
1396 | "data for IMSI '%s'", imsi); | |
6fc6879b JM |
1397 | if (eap_sim_db_send(data, msg, len) < 0) |
1398 | return EAP_SIM_DB_FAILURE; | |
1399 | ||
1400 | entry = os_zalloc(sizeof(*entry)); | |
1401 | if (entry == NULL) | |
1402 | return EAP_SIM_DB_FAILURE; | |
1403 | ||
1404 | os_get_time(&entry->timestamp); | |
1405 | entry->aka = 1; | |
61e181db | 1406 | os_strlcpy(entry->imsi, imsi, sizeof(entry->imsi)); |
6fc6879b JM |
1407 | entry->cb_session_ctx = cb_session_ctx; |
1408 | entry->state = PENDING; | |
1409 | eap_sim_db_add_pending(data, entry); | |
1410 | eap_sim_db_expire_pending(data); | |
1411 | ||
1412 | return EAP_SIM_DB_PENDING; | |
1413 | } | |
1414 | ||
1415 | ||
1416 | /** | |
1417 | * eap_sim_db_resynchronize - Resynchronize AKA AUTN | |
1418 | * @priv: Private data pointer from eap_sim_db_init() | |
61e181db | 1419 | * @username: Permanent username |
6fc6879b JM |
1420 | * @auts: AUTS value from the peer |
1421 | * @_rand: RAND value used in the rejected message | |
1422 | * Returns: 0 on success, -1 on failure | |
1423 | * | |
1424 | * This function is called when the peer reports synchronization failure in the | |
1425 | * AUTN value by sending AUTS. The AUTS and RAND values should be sent to | |
1426 | * HLR/AuC to allow it to resynchronize with the peer. After this, | |
1427 | * eap_sim_db_get_aka_auth() will be called again to to fetch updated | |
1428 | * RAND/AUTN values for the next challenge. | |
1429 | */ | |
61e181db JM |
1430 | int eap_sim_db_resynchronize(void *priv, const char *username, |
1431 | const u8 *auts, const u8 *_rand) | |
6fc6879b JM |
1432 | { |
1433 | struct eap_sim_db_data *data = priv; | |
61e181db JM |
1434 | const char *imsi; |
1435 | size_t imsi_len; | |
6fc6879b | 1436 | |
61e181db JM |
1437 | if (username == NULL || |
1438 | (username[0] != EAP_AKA_PERMANENT_PREFIX && | |
1439 | username[0] != EAP_AKA_PRIME_PERMANENT_PREFIX) || | |
1440 | username[1] == '\0' || os_strlen(username) > 20) { | |
1441 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: unexpected username '%s'", | |
1442 | username); | |
6fc6879b JM |
1443 | return -1; |
1444 | } | |
61e181db JM |
1445 | imsi = username + 1; |
1446 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Get AKA auth for IMSI '%s'", | |
1447 | imsi); | |
6fc6879b JM |
1448 | |
1449 | if (data->sock >= 0) { | |
1450 | char msg[100]; | |
1451 | int len, ret; | |
1452 | ||
61e181db | 1453 | imsi_len = os_strlen(imsi); |
6fc6879b | 1454 | len = os_snprintf(msg, sizeof(msg), "AKA-AUTS "); |
61e181db | 1455 | if (len < 0 || len + imsi_len >= sizeof(msg)) |
6fc6879b | 1456 | return -1; |
61e181db JM |
1457 | os_memcpy(msg + len, imsi, imsi_len); |
1458 | len += imsi_len; | |
6fc6879b JM |
1459 | |
1460 | ret = os_snprintf(msg + len, sizeof(msg) - len, " "); | |
1461 | if (ret < 0 || (size_t) ret >= sizeof(msg) - len) | |
1462 | return -1; | |
1463 | len += ret; | |
1464 | len += wpa_snprintf_hex(msg + len, sizeof(msg) - len, | |
1465 | auts, EAP_AKA_AUTS_LEN); | |
1466 | ret = os_snprintf(msg + len, sizeof(msg) - len, " "); | |
1467 | if (ret < 0 || (size_t) ret >= sizeof(msg) - len) | |
1468 | return -1; | |
1469 | len += ret; | |
1470 | len += wpa_snprintf_hex(msg + len, sizeof(msg) - len, | |
1471 | _rand, EAP_AKA_RAND_LEN); | |
61e181db JM |
1472 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: reporting AKA AUTS for " |
1473 | "IMSI '%s'", imsi); | |
6fc6879b JM |
1474 | if (eap_sim_db_send(data, msg, len) < 0) |
1475 | return -1; | |
1476 | } | |
1477 | ||
1478 | return 0; | |
1479 | } | |
9bf403b9 JM |
1480 | |
1481 | ||
1482 | /** | |
1483 | * sim_get_username - Extract username from SIM identity | |
1484 | * @identity: Identity | |
1485 | * @identity_len: Identity length | |
1486 | * Returns: Allocated buffer with the username part of the identity | |
1487 | * | |
1488 | * Caller is responsible for freeing the returned buffer with os_free(). | |
1489 | */ | |
1490 | char * sim_get_username(const u8 *identity, size_t identity_len) | |
1491 | { | |
1492 | char *username; | |
1493 | size_t pos; | |
1494 | ||
1495 | for (pos = 0; pos < identity_len; pos++) { | |
1496 | if (identity[pos] == '@' || identity[pos] == '\0') | |
1497 | break; | |
1498 | } | |
1499 | ||
1500 | username = os_malloc(pos + 1); | |
1501 | if (username == NULL) | |
1502 | return NULL; | |
1503 | os_memcpy(username, identity, pos); | |
1504 | username[pos] = '\0'; | |
1505 | ||
1506 | return username; | |
1507 | } |