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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; | |
32 | u8 *identity; | |
33 | size_t identity_len; | |
34 | char *pseudonym; | |
35 | }; | |
36 | ||
37 | struct eap_sim_db_pending { | |
38 | struct eap_sim_db_pending *next; | |
39 | u8 imsi[20]; | |
40 | size_t imsi_len; | |
41 | enum { PENDING, SUCCESS, FAILURE } state; | |
42 | void *cb_session_ctx; | |
43 | struct os_time timestamp; | |
44 | int aka; | |
45 | union { | |
46 | struct { | |
47 | u8 kc[EAP_SIM_MAX_CHAL][EAP_SIM_KC_LEN]; | |
48 | u8 sres[EAP_SIM_MAX_CHAL][EAP_SIM_SRES_LEN]; | |
49 | u8 rand[EAP_SIM_MAX_CHAL][GSM_RAND_LEN]; | |
50 | int num_chal; | |
51 | } sim; | |
52 | struct { | |
53 | u8 rand[EAP_AKA_RAND_LEN]; | |
54 | u8 autn[EAP_AKA_AUTN_LEN]; | |
55 | u8 ik[EAP_AKA_IK_LEN]; | |
56 | u8 ck[EAP_AKA_CK_LEN]; | |
57 | u8 res[EAP_AKA_RES_MAX_LEN]; | |
58 | size_t res_len; | |
59 | } aka; | |
60 | } u; | |
61 | }; | |
62 | ||
63 | struct eap_sim_db_data { | |
64 | int sock; | |
65 | char *fname; | |
66 | char *local_sock; | |
67 | void (*get_complete_cb)(void *ctx, void *session_ctx); | |
68 | void *ctx; | |
69 | struct eap_sim_pseudonym *pseudonyms; | |
70 | struct eap_sim_reauth *reauths; | |
71 | struct eap_sim_db_pending *pending; | |
66979bb8 JM |
72 | #ifdef CONFIG_SQLITE |
73 | sqlite3 *sqlite_db; | |
74 | u8 db_tmp_identity[100]; | |
75 | char db_tmp_pseudonym_str[100]; | |
76 | struct eap_sim_pseudonym db_tmp_pseudonym; | |
29813cfd | 77 | struct eap_sim_reauth db_tmp_reauth; |
66979bb8 | 78 | #endif /* CONFIG_SQLITE */ |
6fc6879b JM |
79 | }; |
80 | ||
81 | ||
66979bb8 JM |
82 | #ifdef CONFIG_SQLITE |
83 | ||
84 | static int db_table_exists(sqlite3 *db, const char *name) | |
85 | { | |
86 | char cmd[128]; | |
87 | os_snprintf(cmd, sizeof(cmd), "SELECT 1 FROM %s;", name); | |
88 | return sqlite3_exec(db, cmd, NULL, NULL, NULL) == SQLITE_OK; | |
89 | } | |
90 | ||
91 | ||
92 | static int db_table_create_pseudonym(sqlite3 *db) | |
93 | { | |
94 | char *err = NULL; | |
95 | const char *sql = | |
96 | "CREATE TABLE pseudonyms(" | |
97 | " imsi INTEGER PRIMARY KEY NOT NULL," | |
98 | " pseudonym CHAR(21) NOT NULL" | |
99 | ");"; | |
100 | ||
101 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Adding database table for " | |
102 | "pseudonym information"); | |
103 | if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) { | |
104 | wpa_printf(MSG_ERROR, "EAP-SIM DB: SQLite error: %s", err); | |
105 | sqlite3_free(err); | |
106 | return -1; | |
107 | } | |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
112 | ||
29813cfd JM |
113 | static int db_table_create_reauth(sqlite3 *db) |
114 | { | |
115 | char *err = NULL; | |
116 | const char *sql = | |
117 | "CREATE TABLE reauth(" | |
118 | " imsi INTEGER PRIMARY KEY NOT NULL," | |
119 | " reauth_id CHAR(21) NOT NULL," | |
120 | " counter INTEGER," | |
29813cfd JM |
121 | " mk CHAR(40)," |
122 | " k_encr CHAR(32)," | |
123 | " k_aut CHAR(64)," | |
124 | " k_re CHAR(64)" | |
125 | ");"; | |
126 | ||
127 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Adding database table for " | |
128 | "reauth information"); | |
129 | if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) { | |
130 | wpa_printf(MSG_ERROR, "EAP-SIM DB: SQLite error: %s", err); | |
131 | sqlite3_free(err); | |
132 | return -1; | |
133 | } | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | ||
66979bb8 JM |
139 | static sqlite3 * db_open(const char *db_file) |
140 | { | |
141 | sqlite3 *db; | |
142 | ||
143 | if (sqlite3_open(db_file, &db)) { | |
144 | wpa_printf(MSG_ERROR, "EAP-SIM DB: Failed to open database " | |
145 | "%s: %s", db_file, sqlite3_errmsg(db)); | |
146 | sqlite3_close(db); | |
147 | return NULL; | |
148 | } | |
149 | ||
150 | if (!db_table_exists(db, "pseudonyms") && | |
151 | db_table_create_pseudonym(db) < 0) { | |
152 | sqlite3_close(db); | |
153 | return NULL; | |
154 | } | |
155 | ||
29813cfd JM |
156 | if (!db_table_exists(db, "reauth") && |
157 | db_table_create_reauth(db) < 0) { | |
158 | sqlite3_close(db); | |
159 | return NULL; | |
160 | } | |
161 | ||
66979bb8 JM |
162 | return db; |
163 | } | |
164 | ||
165 | ||
166 | static int valid_pseudonym_string(const char *pseudonym) | |
167 | { | |
168 | const char *pos = pseudonym; | |
169 | while (*pos) { | |
170 | if ((*pos < '0' || *pos > '9') && | |
171 | (*pos < 'a' || *pos > 'f')) | |
172 | return 0; | |
173 | pos++; | |
174 | } | |
175 | return 1; | |
176 | } | |
177 | ||
178 | ||
179 | static int db_add_pseudonym(struct eap_sim_db_data *data, const u8 *identity, | |
180 | size_t identity_len, char *pseudonym) | |
181 | { | |
182 | char cmd[128]; | |
183 | unsigned long long imsi; | |
29813cfd | 184 | char *err = NULL; |
66979bb8 JM |
185 | |
186 | if (!valid_pseudonym_string(pseudonym) || identity_len >= sizeof(cmd)) | |
187 | { | |
188 | os_free(pseudonym); | |
189 | return -1; | |
190 | } | |
191 | os_memcpy(cmd, identity, identity_len); | |
192 | cmd[identity_len] = '\0'; | |
193 | imsi = atoll(cmd); | |
194 | ||
195 | os_snprintf(cmd, sizeof(cmd), "INSERT OR REPLACE INTO pseudonyms " | |
196 | "(imsi, pseudonym) VALUES (%llu , '%s');", | |
197 | imsi, pseudonym); | |
198 | os_free(pseudonym); | |
29813cfd JM |
199 | if (sqlite3_exec(data->sqlite_db, cmd, NULL, NULL, &err) != SQLITE_OK) |
200 | { | |
201 | wpa_printf(MSG_ERROR, "EAP-SIM DB: SQLite error: %s", err); | |
202 | sqlite3_free(err); | |
66979bb8 | 203 | return -1; |
29813cfd | 204 | } |
66979bb8 JM |
205 | |
206 | return 0; | |
207 | } | |
208 | ||
209 | ||
210 | static int get_pseudonym_cb(void *ctx, int argc, char *argv[], char *col[]) | |
211 | { | |
212 | struct eap_sim_db_data *data = ctx; | |
213 | int i; | |
214 | size_t len; | |
215 | ||
216 | for (i = 0; i < argc; i++) { | |
217 | if (os_strcmp(col[i], "imsi") == 0 && argv[i]) { | |
218 | len = os_strlen(argv[i]); | |
219 | if (len > sizeof(data->db_tmp_identity)) | |
220 | continue; | |
221 | os_memcpy(data->db_tmp_identity, argv[i], len); | |
222 | data->db_tmp_pseudonym.identity = | |
223 | data->db_tmp_identity; | |
224 | data->db_tmp_pseudonym.identity_len = len; | |
225 | } else if (os_strcmp(col[i], "pseudonym") == 0 && argv[i]) { | |
226 | len = os_strlen(argv[i]); | |
227 | if (len >= sizeof(data->db_tmp_pseudonym_str)) | |
228 | continue; | |
229 | os_memcpy(data->db_tmp_pseudonym_str, argv[i], len); | |
230 | data->db_tmp_pseudonym_str[len] = '\0'; | |
231 | data->db_tmp_pseudonym.pseudonym = | |
232 | data->db_tmp_pseudonym_str; | |
233 | } | |
234 | } | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | ||
240 | static struct eap_sim_pseudonym * | |
241 | db_get_pseudonym(struct eap_sim_db_data *data, const char *pseudonym) | |
242 | { | |
243 | char cmd[128]; | |
244 | ||
245 | if (!valid_pseudonym_string(pseudonym)) | |
246 | return NULL; | |
247 | os_memset(&data->db_tmp_pseudonym, 0, sizeof(data->db_tmp_pseudonym)); | |
248 | os_strlcpy(data->db_tmp_pseudonym_str, pseudonym, | |
249 | sizeof(data->db_tmp_pseudonym_str)); | |
250 | data->db_tmp_pseudonym.pseudonym = data->db_tmp_pseudonym_str; | |
251 | os_snprintf(cmd, sizeof(cmd), | |
252 | "SELECT imsi FROM pseudonyms WHERE pseudonym='%s';", | |
253 | pseudonym); | |
254 | if (sqlite3_exec(data->sqlite_db, cmd, get_pseudonym_cb, data, NULL) != | |
255 | SQLITE_OK) | |
256 | return NULL; | |
257 | if (data->db_tmp_pseudonym.identity == NULL) | |
258 | return NULL; | |
259 | return &data->db_tmp_pseudonym; | |
260 | } | |
261 | ||
262 | ||
263 | static struct eap_sim_pseudonym * | |
264 | db_get_pseudonym_id(struct eap_sim_db_data *data, const u8 *identity, | |
265 | size_t identity_len) | |
266 | { | |
267 | char cmd[128]; | |
268 | unsigned long long imsi; | |
269 | ||
270 | if (identity_len >= sizeof(cmd)) | |
271 | return NULL; | |
272 | os_memcpy(cmd, identity, identity_len); | |
273 | cmd[identity_len] = '\0'; | |
274 | imsi = atoll(cmd); | |
275 | ||
276 | os_memset(&data->db_tmp_pseudonym, 0, sizeof(data->db_tmp_pseudonym)); | |
277 | if (identity_len > sizeof(data->db_tmp_identity)) | |
278 | return NULL; | |
279 | os_memcpy(data->db_tmp_identity, identity, identity_len); | |
280 | data->db_tmp_pseudonym.identity = data->db_tmp_identity; | |
281 | data->db_tmp_pseudonym.identity_len = identity_len; | |
282 | os_snprintf(cmd, sizeof(cmd), | |
283 | "SELECT pseudonym FROM pseudonyms WHERE imsi=%llu;", imsi); | |
284 | if (sqlite3_exec(data->sqlite_db, cmd, get_pseudonym_cb, data, NULL) != | |
285 | SQLITE_OK) | |
286 | return NULL; | |
287 | if (data->db_tmp_pseudonym.pseudonym == NULL) | |
288 | return NULL; | |
289 | return &data->db_tmp_pseudonym; | |
290 | } | |
291 | ||
29813cfd JM |
292 | |
293 | static int db_add_reauth(struct eap_sim_db_data *data, const u8 *identity, | |
294 | size_t identity_len, char *reauth_id, u16 counter, | |
e87982ea | 295 | const u8 *mk, const u8 *k_encr, |
29813cfd JM |
296 | const u8 *k_aut, const u8 *k_re) |
297 | { | |
298 | char cmd[2000], *pos, *end; | |
299 | unsigned long long imsi; | |
300 | char *err = NULL; | |
301 | ||
302 | if (!valid_pseudonym_string(reauth_id) || identity_len >= sizeof(cmd)) | |
303 | { | |
304 | os_free(reauth_id); | |
305 | return -1; | |
306 | } | |
307 | os_memcpy(cmd, identity, identity_len); | |
308 | cmd[identity_len] = '\0'; | |
309 | imsi = atoll(cmd); | |
310 | ||
311 | pos = cmd; | |
312 | end = pos + sizeof(cmd); | |
313 | pos += os_snprintf(pos, end - pos, "INSERT OR REPLACE INTO reauth " | |
e87982ea JM |
314 | "(imsi, reauth_id, counter%s%s%s%s) " |
315 | "VALUES (%llu, '%s', %u", | |
29813cfd JM |
316 | mk ? ", mk" : "", |
317 | k_encr ? ", k_encr" : "", | |
318 | k_aut ? ", k_aut" : "", | |
319 | k_re ? ", k_re" : "", | |
e87982ea | 320 | imsi, reauth_id, counter); |
29813cfd JM |
321 | os_free(reauth_id); |
322 | ||
323 | if (mk) { | |
324 | pos += os_snprintf(pos, end - pos, ", '"); | |
325 | pos += wpa_snprintf_hex(pos, end - pos, mk, EAP_SIM_MK_LEN); | |
326 | pos += os_snprintf(pos, end - pos, "'"); | |
327 | } | |
328 | ||
329 | if (k_encr) { | |
330 | pos += os_snprintf(pos, end - pos, ", '"); | |
331 | pos += wpa_snprintf_hex(pos, end - pos, k_encr, | |
332 | EAP_SIM_K_ENCR_LEN); | |
333 | pos += os_snprintf(pos, end - pos, "'"); | |
334 | } | |
335 | ||
336 | if (k_aut) { | |
337 | pos += os_snprintf(pos, end - pos, ", '"); | |
338 | pos += wpa_snprintf_hex(pos, end - pos, k_aut, | |
339 | EAP_AKA_PRIME_K_AUT_LEN); | |
340 | pos += os_snprintf(pos, end - pos, "'"); | |
341 | } | |
342 | ||
343 | if (k_re) { | |
344 | pos += os_snprintf(pos, end - pos, ", '"); | |
345 | pos += wpa_snprintf_hex(pos, end - pos, k_re, | |
346 | EAP_AKA_PRIME_K_RE_LEN); | |
347 | pos += os_snprintf(pos, end - pos, "'"); | |
348 | } | |
349 | ||
350 | os_snprintf(pos, end - pos, ");"); | |
351 | ||
352 | if (sqlite3_exec(data->sqlite_db, cmd, NULL, NULL, &err) != SQLITE_OK) | |
353 | { | |
354 | wpa_printf(MSG_ERROR, "EAP-SIM DB: SQLite error: %s", err); | |
355 | sqlite3_free(err); | |
356 | return -1; | |
357 | } | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
362 | ||
363 | static int get_reauth_cb(void *ctx, int argc, char *argv[], char *col[]) | |
364 | { | |
365 | struct eap_sim_db_data *data = ctx; | |
366 | int i; | |
367 | size_t len; | |
368 | struct eap_sim_reauth *reauth = &data->db_tmp_reauth; | |
369 | ||
370 | for (i = 0; i < argc; i++) { | |
371 | if (os_strcmp(col[i], "imsi") == 0 && argv[i]) { | |
372 | len = os_strlen(argv[i]); | |
373 | if (len > sizeof(data->db_tmp_identity)) | |
374 | continue; | |
375 | os_memcpy(data->db_tmp_identity, argv[i], len); | |
376 | reauth->identity = data->db_tmp_identity; | |
377 | reauth->identity_len = len; | |
378 | } else if (os_strcmp(col[i], "reauth_id") == 0 && argv[i]) { | |
379 | len = os_strlen(argv[i]); | |
380 | if (len >= sizeof(data->db_tmp_pseudonym_str)) | |
381 | continue; | |
382 | os_memcpy(data->db_tmp_pseudonym_str, argv[i], len); | |
383 | data->db_tmp_pseudonym_str[len] = '\0'; | |
384 | reauth->reauth_id = data->db_tmp_pseudonym_str; | |
385 | } else if (os_strcmp(col[i], "counter") == 0 && argv[i]) { | |
386 | reauth->counter = atoi(argv[i]); | |
29813cfd JM |
387 | } else if (os_strcmp(col[i], "mk") == 0 && argv[i]) { |
388 | hexstr2bin(argv[i], reauth->mk, sizeof(reauth->mk)); | |
389 | } else if (os_strcmp(col[i], "k_encr") == 0 && argv[i]) { | |
390 | hexstr2bin(argv[i], reauth->k_encr, | |
391 | sizeof(reauth->k_encr)); | |
392 | } else if (os_strcmp(col[i], "k_aut") == 0 && argv[i]) { | |
393 | hexstr2bin(argv[i], reauth->k_aut, | |
394 | sizeof(reauth->k_aut)); | |
395 | } else if (os_strcmp(col[i], "k_re") == 0 && argv[i]) { | |
396 | hexstr2bin(argv[i], reauth->k_re, | |
397 | sizeof(reauth->k_re)); | |
398 | } | |
399 | } | |
400 | ||
401 | return 0; | |
402 | } | |
403 | ||
404 | ||
405 | static struct eap_sim_reauth * | |
406 | db_get_reauth(struct eap_sim_db_data *data, const char *reauth_id) | |
407 | { | |
408 | char cmd[256]; | |
409 | ||
410 | if (!valid_pseudonym_string(reauth_id)) | |
411 | return NULL; | |
412 | os_memset(&data->db_tmp_reauth, 0, sizeof(data->db_tmp_reauth)); | |
413 | os_strlcpy(data->db_tmp_pseudonym_str, reauth_id, | |
414 | sizeof(data->db_tmp_pseudonym_str)); | |
415 | data->db_tmp_reauth.reauth_id = data->db_tmp_pseudonym_str; | |
416 | os_snprintf(cmd, sizeof(cmd), | |
417 | "SELECT * FROM reauth WHERE reauth_id='%s';", reauth_id); | |
418 | if (sqlite3_exec(data->sqlite_db, cmd, get_reauth_cb, data, NULL) != | |
419 | SQLITE_OK) | |
420 | return NULL; | |
421 | if (data->db_tmp_reauth.identity == NULL) | |
422 | return NULL; | |
423 | return &data->db_tmp_reauth; | |
424 | } | |
425 | ||
426 | ||
427 | static struct eap_sim_reauth * | |
428 | db_get_reauth_id(struct eap_sim_db_data *data, const u8 *identity, | |
429 | size_t identity_len) | |
430 | { | |
431 | char cmd[256]; | |
432 | unsigned long long imsi; | |
433 | ||
434 | if (identity_len >= sizeof(cmd)) | |
435 | return NULL; | |
436 | os_memcpy(cmd, identity, identity_len); | |
437 | cmd[identity_len] = '\0'; | |
438 | imsi = atoll(cmd); | |
439 | ||
440 | os_memset(&data->db_tmp_reauth, 0, sizeof(data->db_tmp_reauth)); | |
441 | if (identity_len > sizeof(data->db_tmp_identity)) | |
442 | return NULL; | |
443 | os_memcpy(data->db_tmp_identity, identity, identity_len); | |
444 | data->db_tmp_reauth.identity = data->db_tmp_identity; | |
445 | data->db_tmp_reauth.identity_len = identity_len; | |
446 | os_snprintf(cmd, sizeof(cmd), | |
447 | "SELECT * FROM reauth WHERE imsi=%llu;", imsi); | |
448 | if (sqlite3_exec(data->sqlite_db, cmd, get_reauth_cb, data, NULL) != | |
449 | SQLITE_OK) | |
450 | return NULL; | |
451 | if (data->db_tmp_reauth.reauth_id == NULL) | |
452 | return NULL; | |
453 | return &data->db_tmp_reauth; | |
454 | } | |
455 | ||
456 | ||
457 | static void db_remove_reauth(struct eap_sim_db_data *data, | |
458 | struct eap_sim_reauth *reauth) | |
459 | { | |
460 | char cmd[256]; | |
461 | unsigned long long imsi; | |
462 | ||
463 | if (reauth->identity_len >= sizeof(cmd)) | |
464 | return; | |
465 | os_memcpy(cmd, reauth->identity, reauth->identity_len); | |
466 | cmd[reauth->identity_len] = '\0'; | |
467 | imsi = atoll(cmd); | |
468 | os_snprintf(cmd, sizeof(cmd), | |
469 | "DELETE FROM reauth WHERE imsi=%llu;", imsi); | |
470 | sqlite3_exec(data->sqlite_db, cmd, NULL, NULL, NULL); | |
471 | } | |
472 | ||
66979bb8 JM |
473 | #endif /* CONFIG_SQLITE */ |
474 | ||
29813cfd | 475 | |
6fc6879b JM |
476 | static struct eap_sim_db_pending * |
477 | eap_sim_db_get_pending(struct eap_sim_db_data *data, const u8 *imsi, | |
478 | size_t imsi_len, int aka) | |
479 | { | |
480 | struct eap_sim_db_pending *entry, *prev = NULL; | |
481 | ||
482 | entry = data->pending; | |
483 | while (entry) { | |
484 | if (entry->aka == aka && entry->imsi_len == imsi_len && | |
485 | os_memcmp(entry->imsi, imsi, imsi_len) == 0) { | |
486 | if (prev) | |
487 | prev->next = entry->next; | |
488 | else | |
489 | data->pending = entry->next; | |
490 | break; | |
491 | } | |
492 | prev = entry; | |
493 | entry = entry->next; | |
494 | } | |
495 | return entry; | |
496 | } | |
497 | ||
498 | ||
499 | static void eap_sim_db_add_pending(struct eap_sim_db_data *data, | |
500 | struct eap_sim_db_pending *entry) | |
501 | { | |
502 | entry->next = data->pending; | |
503 | data->pending = entry; | |
504 | } | |
505 | ||
506 | ||
507 | static void eap_sim_db_sim_resp_auth(struct eap_sim_db_data *data, | |
508 | const char *imsi, char *buf) | |
509 | { | |
510 | char *start, *end, *pos; | |
511 | struct eap_sim_db_pending *entry; | |
512 | int num_chal; | |
513 | ||
514 | /* | |
515 | * SIM-RESP-AUTH <IMSI> Kc(i):SRES(i):RAND(i) ... | |
516 | * SIM-RESP-AUTH <IMSI> FAILURE | |
517 | * (IMSI = ASCII string, Kc/SRES/RAND = hex string) | |
518 | */ | |
519 | ||
520 | entry = eap_sim_db_get_pending(data, (u8 *) imsi, os_strlen(imsi), 0); | |
521 | if (entry == NULL) { | |
522 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: No pending entry for the " | |
523 | "received message found"); | |
524 | return; | |
525 | } | |
526 | ||
527 | start = buf; | |
528 | if (os_strncmp(start, "FAILURE", 7) == 0) { | |
529 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: External server reported " | |
530 | "failure"); | |
531 | entry->state = FAILURE; | |
532 | eap_sim_db_add_pending(data, entry); | |
533 | data->get_complete_cb(data->ctx, entry->cb_session_ctx); | |
534 | return; | |
535 | } | |
536 | ||
537 | num_chal = 0; | |
538 | while (num_chal < EAP_SIM_MAX_CHAL) { | |
539 | end = os_strchr(start, ' '); | |
540 | if (end) | |
541 | *end = '\0'; | |
542 | ||
543 | pos = os_strchr(start, ':'); | |
544 | if (pos == NULL) | |
545 | goto parse_fail; | |
546 | *pos = '\0'; | |
547 | if (hexstr2bin(start, entry->u.sim.kc[num_chal], | |
548 | EAP_SIM_KC_LEN)) | |
549 | goto parse_fail; | |
550 | ||
551 | start = pos + 1; | |
552 | pos = os_strchr(start, ':'); | |
553 | if (pos == NULL) | |
554 | goto parse_fail; | |
555 | *pos = '\0'; | |
556 | if (hexstr2bin(start, entry->u.sim.sres[num_chal], | |
557 | EAP_SIM_SRES_LEN)) | |
558 | goto parse_fail; | |
559 | ||
560 | start = pos + 1; | |
561 | if (hexstr2bin(start, entry->u.sim.rand[num_chal], | |
562 | GSM_RAND_LEN)) | |
563 | goto parse_fail; | |
564 | ||
565 | num_chal++; | |
566 | if (end == NULL) | |
567 | break; | |
568 | else | |
569 | start = end + 1; | |
570 | } | |
571 | entry->u.sim.num_chal = num_chal; | |
572 | ||
573 | entry->state = SUCCESS; | |
574 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Authentication data parsed " | |
575 | "successfully - callback"); | |
576 | eap_sim_db_add_pending(data, entry); | |
577 | data->get_complete_cb(data->ctx, entry->cb_session_ctx); | |
578 | return; | |
579 | ||
580 | parse_fail: | |
581 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Failed to parse response string"); | |
582 | os_free(entry); | |
583 | } | |
584 | ||
585 | ||
586 | static void eap_sim_db_aka_resp_auth(struct eap_sim_db_data *data, | |
587 | const char *imsi, char *buf) | |
588 | { | |
589 | char *start, *end; | |
590 | struct eap_sim_db_pending *entry; | |
591 | ||
592 | /* | |
593 | * AKA-RESP-AUTH <IMSI> <RAND> <AUTN> <IK> <CK> <RES> | |
594 | * AKA-RESP-AUTH <IMSI> FAILURE | |
595 | * (IMSI = ASCII string, RAND/AUTN/IK/CK/RES = hex string) | |
596 | */ | |
597 | ||
598 | entry = eap_sim_db_get_pending(data, (u8 *) imsi, os_strlen(imsi), 1); | |
599 | if (entry == NULL) { | |
600 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: No pending entry for the " | |
601 | "received message found"); | |
602 | return; | |
603 | } | |
604 | ||
605 | start = buf; | |
606 | if (os_strncmp(start, "FAILURE", 7) == 0) { | |
607 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: External server reported " | |
608 | "failure"); | |
609 | entry->state = FAILURE; | |
610 | eap_sim_db_add_pending(data, entry); | |
611 | data->get_complete_cb(data->ctx, entry->cb_session_ctx); | |
612 | return; | |
613 | } | |
614 | ||
615 | end = os_strchr(start, ' '); | |
616 | if (end == NULL) | |
617 | goto parse_fail; | |
618 | *end = '\0'; | |
619 | if (hexstr2bin(start, entry->u.aka.rand, EAP_AKA_RAND_LEN)) | |
620 | goto parse_fail; | |
621 | ||
622 | start = end + 1; | |
623 | end = os_strchr(start, ' '); | |
624 | if (end == NULL) | |
625 | goto parse_fail; | |
626 | *end = '\0'; | |
627 | if (hexstr2bin(start, entry->u.aka.autn, EAP_AKA_AUTN_LEN)) | |
628 | goto parse_fail; | |
629 | ||
630 | start = end + 1; | |
631 | end = os_strchr(start, ' '); | |
632 | if (end == NULL) | |
633 | goto parse_fail; | |
634 | *end = '\0'; | |
635 | if (hexstr2bin(start, entry->u.aka.ik, EAP_AKA_IK_LEN)) | |
636 | goto parse_fail; | |
637 | ||
638 | start = end + 1; | |
639 | end = os_strchr(start, ' '); | |
640 | if (end == NULL) | |
641 | goto parse_fail; | |
642 | *end = '\0'; | |
643 | if (hexstr2bin(start, entry->u.aka.ck, EAP_AKA_CK_LEN)) | |
644 | goto parse_fail; | |
645 | ||
646 | start = end + 1; | |
647 | end = os_strchr(start, ' '); | |
648 | if (end) | |
649 | *end = '\0'; | |
650 | else { | |
651 | end = start; | |
652 | while (*end) | |
653 | end++; | |
654 | } | |
655 | entry->u.aka.res_len = (end - start) / 2; | |
656 | if (entry->u.aka.res_len > EAP_AKA_RES_MAX_LEN) { | |
657 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Too long RES"); | |
658 | entry->u.aka.res_len = 0; | |
659 | goto parse_fail; | |
660 | } | |
661 | if (hexstr2bin(start, entry->u.aka.res, entry->u.aka.res_len)) | |
662 | goto parse_fail; | |
663 | ||
664 | entry->state = SUCCESS; | |
665 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Authentication data parsed " | |
666 | "successfully - callback"); | |
667 | eap_sim_db_add_pending(data, entry); | |
668 | data->get_complete_cb(data->ctx, entry->cb_session_ctx); | |
669 | return; | |
670 | ||
671 | parse_fail: | |
672 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Failed to parse response string"); | |
673 | os_free(entry); | |
674 | } | |
675 | ||
676 | ||
677 | static void eap_sim_db_receive(int sock, void *eloop_ctx, void *sock_ctx) | |
678 | { | |
679 | struct eap_sim_db_data *data = eloop_ctx; | |
680 | char buf[1000], *pos, *cmd, *imsi; | |
681 | int res; | |
682 | ||
683 | res = recv(sock, buf, sizeof(buf), 0); | |
684 | if (res < 0) | |
685 | return; | |
686 | wpa_hexdump_ascii_key(MSG_MSGDUMP, "EAP-SIM DB: Received from an " | |
687 | "external source", (u8 *) buf, res); | |
688 | if (res == 0) | |
689 | return; | |
690 | if (res >= (int) sizeof(buf)) | |
691 | res = sizeof(buf) - 1; | |
692 | buf[res] = '\0'; | |
693 | ||
694 | if (data->get_complete_cb == NULL) { | |
695 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: No get_complete_cb " | |
696 | "registered"); | |
697 | return; | |
698 | } | |
699 | ||
700 | /* <cmd> <IMSI> ... */ | |
701 | ||
702 | cmd = buf; | |
703 | pos = os_strchr(cmd, ' '); | |
704 | if (pos == NULL) | |
705 | goto parse_fail; | |
706 | *pos = '\0'; | |
707 | imsi = pos + 1; | |
708 | pos = os_strchr(imsi, ' '); | |
709 | if (pos == NULL) | |
710 | goto parse_fail; | |
711 | *pos = '\0'; | |
712 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: External response=%s for IMSI %s", | |
713 | cmd, imsi); | |
714 | ||
715 | if (os_strcmp(cmd, "SIM-RESP-AUTH") == 0) | |
716 | eap_sim_db_sim_resp_auth(data, imsi, pos + 1); | |
717 | else if (os_strcmp(cmd, "AKA-RESP-AUTH") == 0) | |
718 | eap_sim_db_aka_resp_auth(data, imsi, pos + 1); | |
719 | else | |
720 | wpa_printf(MSG_INFO, "EAP-SIM DB: Unknown external response " | |
721 | "'%s'", cmd); | |
722 | return; | |
723 | ||
724 | parse_fail: | |
725 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Failed to parse response string"); | |
726 | } | |
727 | ||
728 | ||
729 | static int eap_sim_db_open_socket(struct eap_sim_db_data *data) | |
730 | { | |
731 | struct sockaddr_un addr; | |
732 | static int counter = 0; | |
733 | ||
734 | if (os_strncmp(data->fname, "unix:", 5) != 0) | |
735 | return -1; | |
736 | ||
737 | data->sock = socket(PF_UNIX, SOCK_DGRAM, 0); | |
738 | if (data->sock < 0) { | |
739 | perror("socket(eap_sim_db)"); | |
740 | return -1; | |
741 | } | |
742 | ||
743 | os_memset(&addr, 0, sizeof(addr)); | |
744 | addr.sun_family = AF_UNIX; | |
745 | os_snprintf(addr.sun_path, sizeof(addr.sun_path), | |
746 | "/tmp/eap_sim_db_%d-%d", getpid(), counter++); | |
c13f0a3e | 747 | os_free(data->local_sock); |
6fc6879b JM |
748 | data->local_sock = os_strdup(addr.sun_path); |
749 | if (bind(data->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
750 | perror("bind(eap_sim_db)"); | |
751 | close(data->sock); | |
752 | data->sock = -1; | |
753 | return -1; | |
754 | } | |
755 | ||
756 | os_memset(&addr, 0, sizeof(addr)); | |
757 | addr.sun_family = AF_UNIX; | |
758 | os_strlcpy(addr.sun_path, data->fname + 5, sizeof(addr.sun_path)); | |
759 | if (connect(data->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
760 | perror("connect(eap_sim_db)"); | |
761 | wpa_hexdump_ascii(MSG_INFO, "HLR/AuC GW socket", | |
762 | (u8 *) addr.sun_path, | |
763 | os_strlen(addr.sun_path)); | |
764 | close(data->sock); | |
765 | data->sock = -1; | |
766 | return -1; | |
767 | } | |
768 | ||
769 | eloop_register_read_sock(data->sock, eap_sim_db_receive, data, NULL); | |
770 | ||
771 | return 0; | |
772 | } | |
773 | ||
774 | ||
775 | static void eap_sim_db_close_socket(struct eap_sim_db_data *data) | |
776 | { | |
777 | if (data->sock >= 0) { | |
778 | eloop_unregister_read_sock(data->sock); | |
779 | close(data->sock); | |
780 | data->sock = -1; | |
781 | } | |
782 | if (data->local_sock) { | |
783 | unlink(data->local_sock); | |
784 | os_free(data->local_sock); | |
785 | data->local_sock = NULL; | |
786 | } | |
787 | } | |
788 | ||
789 | ||
790 | /** | |
791 | * eap_sim_db_init - Initialize EAP-SIM DB / authentication gateway interface | |
792 | * @config: Configuration data (e.g., file name) | |
793 | * @get_complete_cb: Callback function for reporting availability of triplets | |
794 | * @ctx: Context pointer for get_complete_cb | |
795 | * Returns: Pointer to a private data structure or %NULL on failure | |
796 | */ | |
797 | void * eap_sim_db_init(const char *config, | |
798 | void (*get_complete_cb)(void *ctx, void *session_ctx), | |
799 | void *ctx) | |
800 | { | |
801 | struct eap_sim_db_data *data; | |
66979bb8 | 802 | char *pos; |
6fc6879b JM |
803 | |
804 | data = os_zalloc(sizeof(*data)); | |
805 | if (data == NULL) | |
806 | return NULL; | |
807 | ||
808 | data->sock = -1; | |
809 | data->get_complete_cb = get_complete_cb; | |
810 | data->ctx = ctx; | |
811 | data->fname = os_strdup(config); | |
812 | if (data->fname == NULL) | |
813 | goto fail; | |
66979bb8 JM |
814 | pos = os_strstr(data->fname, " db="); |
815 | if (pos) { | |
816 | *pos = '\0'; | |
817 | #ifdef CONFIG_SQLITE | |
818 | pos += 4; | |
819 | data->sqlite_db = db_open(pos); | |
820 | if (data->sqlite_db == NULL) | |
821 | goto fail; | |
822 | #endif /* CONFIG_SQLITE */ | |
823 | } | |
6fc6879b JM |
824 | |
825 | if (os_strncmp(data->fname, "unix:", 5) == 0) { | |
704b8762 JM |
826 | if (eap_sim_db_open_socket(data)) { |
827 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: External database " | |
828 | "connection not available - will retry " | |
829 | "later"); | |
830 | } | |
6fc6879b JM |
831 | } |
832 | ||
833 | return data; | |
834 | ||
835 | fail: | |
836 | eap_sim_db_close_socket(data); | |
837 | os_free(data->fname); | |
838 | os_free(data); | |
839 | return NULL; | |
840 | } | |
841 | ||
842 | ||
843 | static void eap_sim_db_free_pseudonym(struct eap_sim_pseudonym *p) | |
844 | { | |
845 | os_free(p->identity); | |
846 | os_free(p->pseudonym); | |
847 | os_free(p); | |
848 | } | |
849 | ||
850 | ||
851 | static void eap_sim_db_free_reauth(struct eap_sim_reauth *r) | |
852 | { | |
853 | os_free(r->identity); | |
854 | os_free(r->reauth_id); | |
855 | os_free(r); | |
856 | } | |
857 | ||
858 | ||
859 | /** | |
860 | * eap_sim_db_deinit - Deinitialize EAP-SIM DB/authentication gw interface | |
861 | * @priv: Private data pointer from eap_sim_db_init() | |
862 | */ | |
863 | void eap_sim_db_deinit(void *priv) | |
864 | { | |
865 | struct eap_sim_db_data *data = priv; | |
866 | struct eap_sim_pseudonym *p, *prev; | |
867 | struct eap_sim_reauth *r, *prevr; | |
868 | struct eap_sim_db_pending *pending, *prev_pending; | |
869 | ||
66979bb8 JM |
870 | #ifdef CONFIG_SQLITE |
871 | if (data->sqlite_db) { | |
872 | sqlite3_close(data->sqlite_db); | |
873 | data->sqlite_db = NULL; | |
874 | } | |
875 | #endif /* CONFIG_SQLITE */ | |
876 | ||
6fc6879b JM |
877 | eap_sim_db_close_socket(data); |
878 | os_free(data->fname); | |
879 | ||
880 | p = data->pseudonyms; | |
881 | while (p) { | |
882 | prev = p; | |
883 | p = p->next; | |
884 | eap_sim_db_free_pseudonym(prev); | |
885 | } | |
886 | ||
887 | r = data->reauths; | |
888 | while (r) { | |
889 | prevr = r; | |
890 | r = r->next; | |
891 | eap_sim_db_free_reauth(prevr); | |
892 | } | |
893 | ||
894 | pending = data->pending; | |
895 | while (pending) { | |
896 | prev_pending = pending; | |
897 | pending = pending->next; | |
898 | os_free(prev_pending); | |
899 | } | |
900 | ||
901 | os_free(data); | |
902 | } | |
903 | ||
904 | ||
905 | static int eap_sim_db_send(struct eap_sim_db_data *data, const char *msg, | |
906 | size_t len) | |
907 | { | |
908 | int _errno = 0; | |
909 | ||
910 | if (send(data->sock, msg, len, 0) < 0) { | |
911 | _errno = errno; | |
912 | perror("send[EAP-SIM DB UNIX]"); | |
913 | } | |
914 | ||
915 | if (_errno == ENOTCONN || _errno == EDESTADDRREQ || _errno == EINVAL || | |
916 | _errno == ECONNREFUSED) { | |
917 | /* Try to reconnect */ | |
918 | eap_sim_db_close_socket(data); | |
919 | if (eap_sim_db_open_socket(data) < 0) | |
920 | return -1; | |
921 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Reconnected to the " | |
922 | "external server"); | |
923 | if (send(data->sock, msg, len, 0) < 0) { | |
924 | perror("send[EAP-SIM DB UNIX]"); | |
925 | return -1; | |
926 | } | |
927 | } | |
928 | ||
929 | return 0; | |
930 | } | |
931 | ||
932 | ||
933 | static void eap_sim_db_expire_pending(struct eap_sim_db_data *data) | |
934 | { | |
935 | /* TODO: add limit for maximum length for pending list; remove latest | |
936 | * (i.e., last) entry from the list if the limit is reached; could also | |
937 | * use timeout to expire pending entries */ | |
938 | } | |
939 | ||
940 | ||
941 | /** | |
942 | * eap_sim_db_get_gsm_triplets - Get GSM triplets | |
943 | * @priv: Private data pointer from eap_sim_db_init() | |
944 | * @identity: User name identity | |
945 | * @identity_len: Length of identity in bytes | |
946 | * @max_chal: Maximum number of triplets | |
947 | * @_rand: Buffer for RAND values | |
948 | * @kc: Buffer for Kc values | |
949 | * @sres: Buffer for SRES values | |
950 | * @cb_session_ctx: Session callback context for get_complete_cb() | |
951 | * Returns: Number of triplets received (has to be less than or equal to | |
952 | * max_chal), -1 (EAP_SIM_DB_FAILURE) on error (e.g., user not found), or | |
953 | * -2 (EAP_SIM_DB_PENDING) if results are not yet available. In this case, the | |
954 | * callback function registered with eap_sim_db_init() will be called once the | |
955 | * results become available. | |
956 | * | |
957 | * In most cases, the user name is '1' | IMSI, i.e., 1 followed by the IMSI in | |
958 | * ASCII format. | |
959 | * | |
960 | * When using an external server for GSM triplets, this function can always | |
961 | * start a request and return EAP_SIM_DB_PENDING immediately if authentication | |
962 | * triplets are not available. Once the triplets are received, callback | |
963 | * function registered with eap_sim_db_init() is called to notify EAP state | |
964 | * machine to reprocess the message. This eap_sim_db_get_gsm_triplets() | |
965 | * function will then be called again and the newly received triplets will then | |
966 | * be given to the caller. | |
967 | */ | |
968 | int eap_sim_db_get_gsm_triplets(void *priv, const u8 *identity, | |
969 | size_t identity_len, int max_chal, | |
970 | u8 *_rand, u8 *kc, u8 *sres, | |
971 | void *cb_session_ctx) | |
972 | { | |
973 | struct eap_sim_db_data *data = priv; | |
974 | struct eap_sim_db_pending *entry; | |
975 | int len, ret; | |
976 | size_t i; | |
977 | char msg[40]; | |
978 | ||
979 | if (identity_len < 2 || identity[0] != EAP_SIM_PERMANENT_PREFIX) { | |
980 | wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM DB: unexpected identity", | |
981 | identity, identity_len); | |
982 | return EAP_SIM_DB_FAILURE; | |
983 | } | |
984 | identity++; | |
985 | identity_len--; | |
986 | for (i = 0; i < identity_len; i++) { | |
987 | if (identity[i] == '@') { | |
988 | identity_len = i; | |
989 | break; | |
990 | } | |
991 | } | |
992 | if (identity_len + 1 > sizeof(entry->imsi)) { | |
993 | wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM DB: unexpected identity", | |
994 | identity, identity_len); | |
995 | return EAP_SIM_DB_FAILURE; | |
996 | } | |
997 | wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM DB: Get GSM triplets for IMSI", | |
998 | identity, identity_len); | |
999 | ||
1000 | entry = eap_sim_db_get_pending(data, identity, identity_len, 0); | |
1001 | if (entry) { | |
1002 | int num_chal; | |
1003 | if (entry->state == FAILURE) { | |
1004 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Pending entry -> " | |
1005 | "failure"); | |
1006 | os_free(entry); | |
1007 | return EAP_SIM_DB_FAILURE; | |
1008 | } | |
1009 | ||
1010 | if (entry->state == PENDING) { | |
1011 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Pending entry -> " | |
1012 | "still pending"); | |
1013 | eap_sim_db_add_pending(data, entry); | |
1014 | return EAP_SIM_DB_PENDING; | |
1015 | } | |
1016 | ||
1017 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Pending entry -> " | |
1018 | "%d challenges", entry->u.sim.num_chal); | |
1019 | num_chal = entry->u.sim.num_chal; | |
1020 | if (num_chal > max_chal) | |
1021 | num_chal = max_chal; | |
1022 | os_memcpy(_rand, entry->u.sim.rand, num_chal * GSM_RAND_LEN); | |
1023 | os_memcpy(sres, entry->u.sim.sres, | |
1024 | num_chal * EAP_SIM_SRES_LEN); | |
1025 | os_memcpy(kc, entry->u.sim.kc, num_chal * EAP_SIM_KC_LEN); | |
1026 | os_free(entry); | |
1027 | return num_chal; | |
1028 | } | |
1029 | ||
1030 | if (data->sock < 0) { | |
1031 | if (eap_sim_db_open_socket(data) < 0) | |
1032 | return EAP_SIM_DB_FAILURE; | |
1033 | } | |
1034 | ||
1035 | len = os_snprintf(msg, sizeof(msg), "SIM-REQ-AUTH "); | |
1036 | if (len < 0 || len + identity_len >= sizeof(msg)) | |
1037 | return EAP_SIM_DB_FAILURE; | |
1038 | os_memcpy(msg + len, identity, identity_len); | |
1039 | len += identity_len; | |
1040 | ret = os_snprintf(msg + len, sizeof(msg) - len, " %d", max_chal); | |
1041 | if (ret < 0 || (size_t) ret >= sizeof(msg) - len) | |
1042 | return EAP_SIM_DB_FAILURE; | |
1043 | len += ret; | |
1044 | ||
1045 | wpa_hexdump(MSG_DEBUG, "EAP-SIM DB: requesting SIM authentication " | |
1046 | "data for IMSI", identity, identity_len); | |
1047 | if (eap_sim_db_send(data, msg, len) < 0) | |
1048 | return EAP_SIM_DB_FAILURE; | |
1049 | ||
1050 | entry = os_zalloc(sizeof(*entry)); | |
1051 | if (entry == NULL) | |
1052 | return EAP_SIM_DB_FAILURE; | |
1053 | ||
1054 | os_get_time(&entry->timestamp); | |
1055 | os_memcpy(entry->imsi, identity, identity_len); | |
1056 | entry->imsi_len = identity_len; | |
1057 | entry->cb_session_ctx = cb_session_ctx; | |
1058 | entry->state = PENDING; | |
1059 | eap_sim_db_add_pending(data, entry); | |
1060 | eap_sim_db_expire_pending(data); | |
1061 | ||
1062 | return EAP_SIM_DB_PENDING; | |
1063 | } | |
1064 | ||
1065 | ||
1066 | static struct eap_sim_pseudonym * | |
1067 | eap_sim_db_get_pseudonym(struct eap_sim_db_data *data, const u8 *identity, | |
1068 | size_t identity_len) | |
1069 | { | |
1070 | char *pseudonym; | |
1071 | size_t len; | |
1072 | struct eap_sim_pseudonym *p; | |
1073 | ||
1074 | if (identity_len == 0 || | |
1075 | (identity[0] != EAP_SIM_PSEUDONYM_PREFIX && | |
762e4ce6 JM |
1076 | identity[0] != EAP_AKA_PSEUDONYM_PREFIX && |
1077 | identity[0] != EAP_AKA_PRIME_PSEUDONYM_PREFIX)) | |
6fc6879b JM |
1078 | return NULL; |
1079 | ||
1080 | /* Remove possible realm from identity */ | |
1081 | len = 0; | |
1082 | while (len < identity_len) { | |
1083 | if (identity[len] == '@') | |
1084 | break; | |
1085 | len++; | |
1086 | } | |
1087 | ||
1088 | pseudonym = os_malloc(len + 1); | |
1089 | if (pseudonym == NULL) | |
1090 | return NULL; | |
1091 | os_memcpy(pseudonym, identity, len); | |
1092 | pseudonym[len] = '\0'; | |
1093 | ||
66979bb8 JM |
1094 | #ifdef CONFIG_SQLITE |
1095 | if (data->sqlite_db) { | |
1096 | p = db_get_pseudonym(data, pseudonym); | |
1097 | os_free(pseudonym); | |
1098 | return p; | |
1099 | } | |
1100 | #endif /* CONFIG_SQLITE */ | |
1101 | ||
6fc6879b JM |
1102 | p = data->pseudonyms; |
1103 | while (p) { | |
1104 | if (os_strcmp(p->pseudonym, pseudonym) == 0) | |
1105 | break; | |
1106 | p = p->next; | |
1107 | } | |
1108 | ||
1109 | os_free(pseudonym); | |
1110 | ||
1111 | return p; | |
1112 | } | |
1113 | ||
1114 | ||
1115 | static struct eap_sim_pseudonym * | |
1116 | eap_sim_db_get_pseudonym_id(struct eap_sim_db_data *data, const u8 *identity, | |
1117 | size_t identity_len) | |
1118 | { | |
1119 | struct eap_sim_pseudonym *p; | |
1120 | ||
1121 | if (identity_len == 0 || | |
1122 | (identity[0] != EAP_SIM_PERMANENT_PREFIX && | |
762e4ce6 JM |
1123 | identity[0] != EAP_AKA_PERMANENT_PREFIX && |
1124 | identity[0] != EAP_AKA_PRIME_PERMANENT_PREFIX)) | |
6fc6879b JM |
1125 | return NULL; |
1126 | ||
66979bb8 JM |
1127 | #ifdef CONFIG_SQLITE |
1128 | if (data->sqlite_db) | |
1129 | return db_get_pseudonym_id(data, identity, identity_len); | |
1130 | #endif /* CONFIG_SQLITE */ | |
1131 | ||
6fc6879b JM |
1132 | p = data->pseudonyms; |
1133 | while (p) { | |
1134 | if (identity_len == p->identity_len && | |
1135 | os_memcmp(p->identity, identity, identity_len) == 0) | |
1136 | break; | |
1137 | p = p->next; | |
1138 | } | |
1139 | ||
1140 | return p; | |
1141 | } | |
1142 | ||
1143 | ||
1144 | static struct eap_sim_reauth * | |
1145 | eap_sim_db_get_reauth(struct eap_sim_db_data *data, const u8 *identity, | |
1146 | size_t identity_len) | |
1147 | { | |
1148 | char *reauth_id; | |
1149 | size_t len; | |
1150 | struct eap_sim_reauth *r; | |
1151 | ||
1152 | if (identity_len == 0 || | |
1153 | (identity[0] != EAP_SIM_REAUTH_ID_PREFIX && | |
762e4ce6 JM |
1154 | identity[0] != EAP_AKA_REAUTH_ID_PREFIX && |
1155 | identity[0] != EAP_AKA_PRIME_REAUTH_ID_PREFIX)) | |
6fc6879b JM |
1156 | return NULL; |
1157 | ||
1158 | /* Remove possible realm from identity */ | |
1159 | len = 0; | |
1160 | while (len < identity_len) { | |
1161 | if (identity[len] == '@') | |
1162 | break; | |
1163 | len++; | |
1164 | } | |
1165 | ||
1166 | reauth_id = os_malloc(len + 1); | |
1167 | if (reauth_id == NULL) | |
1168 | return NULL; | |
1169 | os_memcpy(reauth_id, identity, len); | |
1170 | reauth_id[len] = '\0'; | |
1171 | ||
29813cfd JM |
1172 | #ifdef CONFIG_SQLITE |
1173 | if (data->sqlite_db) { | |
1174 | r = db_get_reauth(data, reauth_id); | |
1175 | os_free(reauth_id); | |
1176 | return r; | |
1177 | } | |
1178 | #endif /* CONFIG_SQLITE */ | |
1179 | ||
6fc6879b JM |
1180 | r = data->reauths; |
1181 | while (r) { | |
1182 | if (os_strcmp(r->reauth_id, reauth_id) == 0) | |
1183 | break; | |
1184 | r = r->next; | |
1185 | } | |
1186 | ||
1187 | os_free(reauth_id); | |
1188 | ||
1189 | return r; | |
1190 | } | |
1191 | ||
1192 | ||
1193 | static struct eap_sim_reauth * | |
1194 | eap_sim_db_get_reauth_id(struct eap_sim_db_data *data, const u8 *identity, | |
1195 | size_t identity_len) | |
1196 | { | |
1197 | struct eap_sim_pseudonym *p; | |
1198 | struct eap_sim_reauth *r; | |
1199 | ||
1200 | if (identity_len == 0) | |
1201 | return NULL; | |
1202 | ||
1203 | p = eap_sim_db_get_pseudonym(data, identity, identity_len); | |
1204 | if (p == NULL) | |
1205 | p = eap_sim_db_get_pseudonym_id(data, identity, identity_len); | |
1206 | if (p) { | |
1207 | identity = p->identity; | |
1208 | identity_len = p->identity_len; | |
1209 | } | |
1210 | ||
29813cfd JM |
1211 | #ifdef CONFIG_SQLITE |
1212 | if (data->sqlite_db) | |
1213 | return db_get_reauth_id(data, identity, identity_len); | |
1214 | #endif /* CONFIG_SQLITE */ | |
1215 | ||
6fc6879b JM |
1216 | r = data->reauths; |
1217 | while (r) { | |
1218 | if (identity_len == r->identity_len && | |
1219 | os_memcmp(r->identity, identity, identity_len) == 0) | |
1220 | break; | |
1221 | r = r->next; | |
1222 | } | |
1223 | ||
1224 | return r; | |
1225 | } | |
1226 | ||
1227 | ||
1228 | /** | |
1229 | * eap_sim_db_identity_known - Verify whether the given identity is known | |
1230 | * @priv: Private data pointer from eap_sim_db_init() | |
1231 | * @identity: User name identity | |
1232 | * @identity_len: Length of identity in bytes | |
1233 | * Returns: 0 if the user is found or -1 on failure | |
1234 | * | |
762e4ce6 JM |
1235 | * In most cases, the user name is ['0','1','6'] | IMSI, i.e., 1 followed by |
1236 | * the IMSI in ASCII format for EAP-SIM, ['2','3','7'] | pseudonym, or | |
1237 | * ['4','5','7'] | reauth_id. | |
6fc6879b JM |
1238 | */ |
1239 | int eap_sim_db_identity_known(void *priv, const u8 *identity, | |
1240 | size_t identity_len) | |
1241 | { | |
1242 | struct eap_sim_db_data *data = priv; | |
1243 | ||
1244 | if (identity == NULL || identity_len < 2) | |
1245 | return -1; | |
1246 | ||
1247 | if (identity[0] == EAP_SIM_PSEUDONYM_PREFIX || | |
762e4ce6 JM |
1248 | identity[0] == EAP_AKA_PSEUDONYM_PREFIX || |
1249 | identity[0] == EAP_AKA_PRIME_PSEUDONYM_PREFIX) { | |
6fc6879b JM |
1250 | struct eap_sim_pseudonym *p = |
1251 | eap_sim_db_get_pseudonym(data, identity, identity_len); | |
1252 | return p ? 0 : -1; | |
1253 | } | |
1254 | ||
1255 | if (identity[0] == EAP_SIM_REAUTH_ID_PREFIX || | |
762e4ce6 JM |
1256 | identity[0] == EAP_AKA_REAUTH_ID_PREFIX || |
1257 | identity[0] == EAP_AKA_PRIME_REAUTH_ID_PREFIX) { | |
6fc6879b JM |
1258 | struct eap_sim_reauth *r = |
1259 | eap_sim_db_get_reauth(data, identity, identity_len); | |
1260 | return r ? 0 : -1; | |
1261 | } | |
1262 | ||
1263 | if (identity[0] != EAP_SIM_PERMANENT_PREFIX && | |
762e4ce6 JM |
1264 | identity[0] != EAP_AKA_PERMANENT_PREFIX && |
1265 | identity[0] != EAP_AKA_PRIME_PERMANENT_PREFIX) { | |
6fc6879b JM |
1266 | /* Unknown identity prefix */ |
1267 | return -1; | |
1268 | } | |
1269 | ||
1270 | /* TODO: Should consider asking HLR/AuC gateway whether this permanent | |
1271 | * identity is known. If it is, EAP-SIM/AKA can skip identity request. | |
1272 | * In case of EAP-AKA, this would reduce number of needed round-trips. | |
1273 | * Ideally, this would be done with one wait, i.e., just request | |
1274 | * authentication data and store it for the next use. This would then | |
1275 | * need to use similar pending-request functionality as the normal | |
1276 | * request for authentication data at later phase. | |
1277 | */ | |
1278 | return -1; | |
1279 | } | |
1280 | ||
1281 | ||
1282 | static char * eap_sim_db_get_next(struct eap_sim_db_data *data, char prefix) | |
1283 | { | |
1284 | char *id, *pos, *end; | |
1285 | u8 buf[10]; | |
1286 | ||
3642c431 | 1287 | if (random_get_bytes(buf, sizeof(buf))) |
6fc6879b JM |
1288 | return NULL; |
1289 | id = os_malloc(sizeof(buf) * 2 + 2); | |
1290 | if (id == NULL) | |
1291 | return NULL; | |
1292 | ||
1293 | pos = id; | |
1294 | end = id + sizeof(buf) * 2 + 2; | |
1295 | *pos++ = prefix; | |
1296 | pos += wpa_snprintf_hex(pos, end - pos, buf, sizeof(buf)); | |
1297 | ||
1298 | return id; | |
1299 | } | |
1300 | ||
1301 | ||
1302 | /** | |
1303 | * eap_sim_db_get_next_pseudonym - EAP-SIM DB: Get next pseudonym | |
1304 | * @priv: Private data pointer from eap_sim_db_init() | |
762e4ce6 | 1305 | * @method: EAP method (SIM/AKA/AKA') |
6fc6879b JM |
1306 | * Returns: Next pseudonym (allocated string) or %NULL on failure |
1307 | * | |
1308 | * This function is used to generate a pseudonym for EAP-SIM. The returned | |
1309 | * pseudonym is not added to database at this point; it will need to be added | |
1310 | * with eap_sim_db_add_pseudonym() once the authentication has been completed | |
1311 | * successfully. Caller is responsible for freeing the returned buffer. | |
1312 | */ | |
762e4ce6 | 1313 | char * eap_sim_db_get_next_pseudonym(void *priv, enum eap_sim_db_method method) |
6fc6879b JM |
1314 | { |
1315 | struct eap_sim_db_data *data = priv; | |
762e4ce6 JM |
1316 | char prefix = EAP_SIM_REAUTH_ID_PREFIX; |
1317 | ||
1318 | switch (method) { | |
1319 | case EAP_SIM_DB_SIM: | |
1320 | prefix = EAP_SIM_PSEUDONYM_PREFIX; | |
1321 | break; | |
1322 | case EAP_SIM_DB_AKA: | |
1323 | prefix = EAP_AKA_PSEUDONYM_PREFIX; | |
1324 | break; | |
1325 | case EAP_SIM_DB_AKA_PRIME: | |
1326 | prefix = EAP_AKA_PRIME_PSEUDONYM_PREFIX; | |
1327 | break; | |
1328 | } | |
1329 | ||
1330 | return eap_sim_db_get_next(data, prefix); | |
6fc6879b JM |
1331 | } |
1332 | ||
1333 | ||
1334 | /** | |
1335 | * eap_sim_db_get_next_reauth_id - EAP-SIM DB: Get next reauth_id | |
1336 | * @priv: Private data pointer from eap_sim_db_init() | |
762e4ce6 | 1337 | * @method: EAP method (SIM/AKA/AKA') |
6fc6879b JM |
1338 | * Returns: Next reauth_id (allocated string) or %NULL on failure |
1339 | * | |
1340 | * This function is used to generate a fast re-authentication identity for | |
1341 | * EAP-SIM. The returned reauth_id is not added to database at this point; it | |
1342 | * will need to be added with eap_sim_db_add_reauth() once the authentication | |
1343 | * has been completed successfully. Caller is responsible for freeing the | |
1344 | * returned buffer. | |
1345 | */ | |
762e4ce6 | 1346 | char * eap_sim_db_get_next_reauth_id(void *priv, enum eap_sim_db_method method) |
6fc6879b JM |
1347 | { |
1348 | struct eap_sim_db_data *data = priv; | |
762e4ce6 JM |
1349 | char prefix = EAP_SIM_REAUTH_ID_PREFIX; |
1350 | ||
1351 | switch (method) { | |
1352 | case EAP_SIM_DB_SIM: | |
1353 | prefix = EAP_SIM_REAUTH_ID_PREFIX; | |
1354 | break; | |
1355 | case EAP_SIM_DB_AKA: | |
1356 | prefix = EAP_AKA_REAUTH_ID_PREFIX; | |
1357 | break; | |
1358 | case EAP_SIM_DB_AKA_PRIME: | |
1359 | prefix = EAP_AKA_PRIME_REAUTH_ID_PREFIX; | |
1360 | break; | |
1361 | } | |
1362 | ||
1363 | return eap_sim_db_get_next(data, prefix); | |
6fc6879b JM |
1364 | } |
1365 | ||
1366 | ||
1367 | /** | |
1368 | * eap_sim_db_add_pseudonym - EAP-SIM DB: Add new pseudonym | |
1369 | * @priv: Private data pointer from eap_sim_db_init() | |
1370 | * @identity: Identity of the user (may be permanent identity or pseudonym) | |
1371 | * @identity_len: Length of identity | |
1372 | * @pseudonym: Pseudonym for this user. This needs to be an allocated buffer, | |
1373 | * e.g., return value from eap_sim_db_get_next_pseudonym(). Caller must not | |
1374 | * free it. | |
1375 | * Returns: 0 on success, -1 on failure | |
1376 | * | |
1377 | * This function adds a new pseudonym for EAP-SIM user. EAP-SIM DB is | |
1378 | * responsible of freeing pseudonym buffer once it is not needed anymore. | |
1379 | */ | |
1380 | int eap_sim_db_add_pseudonym(void *priv, const u8 *identity, | |
1381 | size_t identity_len, char *pseudonym) | |
1382 | { | |
1383 | struct eap_sim_db_data *data = priv; | |
1384 | struct eap_sim_pseudonym *p; | |
1385 | wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM DB: Add pseudonym for identity", | |
1386 | identity, identity_len); | |
1387 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Pseudonym: %s", pseudonym); | |
1388 | ||
1389 | /* TODO: could store last two pseudonyms */ | |
66979bb8 JM |
1390 | #ifdef CONFIG_SQLITE |
1391 | if (data->sqlite_db) | |
1392 | return db_add_pseudonym(data, identity, identity_len, | |
1393 | pseudonym); | |
1394 | #endif /* CONFIG_SQLITE */ | |
6fc6879b JM |
1395 | p = eap_sim_db_get_pseudonym(data, identity, identity_len); |
1396 | if (p == NULL) | |
1397 | p = eap_sim_db_get_pseudonym_id(data, identity, identity_len); | |
1398 | ||
1399 | if (p) { | |
1400 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Replacing previous " | |
1401 | "pseudonym: %s", p->pseudonym); | |
1402 | os_free(p->pseudonym); | |
1403 | p->pseudonym = pseudonym; | |
1404 | return 0; | |
1405 | } | |
1406 | ||
1407 | p = os_zalloc(sizeof(*p)); | |
1408 | if (p == NULL) { | |
1409 | os_free(pseudonym); | |
1410 | return -1; | |
1411 | } | |
1412 | ||
1413 | p->next = data->pseudonyms; | |
1414 | p->identity = os_malloc(identity_len); | |
1415 | if (p->identity == NULL) { | |
1416 | os_free(p); | |
1417 | os_free(pseudonym); | |
1418 | return -1; | |
1419 | } | |
1420 | os_memcpy(p->identity, identity, identity_len); | |
1421 | p->identity_len = identity_len; | |
1422 | p->pseudonym = pseudonym; | |
1423 | data->pseudonyms = p; | |
1424 | ||
1425 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Added new pseudonym entry"); | |
1426 | return 0; | |
1427 | } | |
1428 | ||
1429 | ||
9881795e JM |
1430 | static struct eap_sim_reauth * |
1431 | eap_sim_db_add_reauth_data(struct eap_sim_db_data *data, const u8 *identity, | |
1432 | size_t identity_len, char *reauth_id, u16 counter) | |
6fc6879b | 1433 | { |
6fc6879b | 1434 | struct eap_sim_reauth *r; |
9881795e | 1435 | |
6fc6879b JM |
1436 | wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM DB: Add reauth_id for identity", |
1437 | identity, identity_len); | |
1438 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: reauth_id: %s", reauth_id); | |
1439 | ||
1440 | r = eap_sim_db_get_reauth(data, identity, identity_len); | |
1441 | if (r == NULL) | |
1442 | r = eap_sim_db_get_reauth_id(data, identity, identity_len); | |
1443 | ||
1444 | if (r) { | |
1445 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Replacing previous " | |
1446 | "reauth_id: %s", r->reauth_id); | |
1447 | os_free(r->reauth_id); | |
1448 | r->reauth_id = reauth_id; | |
1449 | } else { | |
1450 | r = os_zalloc(sizeof(*r)); | |
1451 | if (r == NULL) { | |
1452 | os_free(reauth_id); | |
9881795e | 1453 | return NULL; |
6fc6879b JM |
1454 | } |
1455 | ||
1456 | r->next = data->reauths; | |
1457 | r->identity = os_malloc(identity_len); | |
1458 | if (r->identity == NULL) { | |
1459 | os_free(r); | |
1460 | os_free(reauth_id); | |
9881795e | 1461 | return NULL; |
6fc6879b JM |
1462 | } |
1463 | os_memcpy(r->identity, identity, identity_len); | |
1464 | r->identity_len = identity_len; | |
1465 | r->reauth_id = reauth_id; | |
1466 | data->reauths = r; | |
1467 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Added new reauth entry"); | |
1468 | } | |
1469 | ||
1470 | r->counter = counter; | |
9881795e JM |
1471 | |
1472 | return r; | |
1473 | } | |
1474 | ||
1475 | ||
1476 | /** | |
1477 | * eap_sim_db_add_reauth - EAP-SIM DB: Add new re-authentication entry | |
1478 | * @priv: Private data pointer from eap_sim_db_init() | |
1479 | * @identity: Identity of the user (may be permanent identity or pseudonym) | |
1480 | * @identity_len: Length of identity | |
1481 | * @reauth_id: reauth_id for this user. This needs to be an allocated buffer, | |
1482 | * e.g., return value from eap_sim_db_get_next_reauth_id(). Caller must not | |
1483 | * free it. | |
a17df5fb | 1484 | * @counter: AT_COUNTER value for fast re-authentication |
9881795e JM |
1485 | * @mk: 16-byte MK from the previous full authentication or %NULL |
1486 | * Returns: 0 on success, -1 on failure | |
1487 | * | |
1488 | * This function adds a new re-authentication entry for an EAP-SIM user. | |
1489 | * EAP-SIM DB is responsible of freeing reauth_id buffer once it is not needed | |
1490 | * anymore. | |
1491 | */ | |
1492 | int eap_sim_db_add_reauth(void *priv, const u8 *identity, | |
1493 | size_t identity_len, char *reauth_id, u16 counter, | |
1494 | const u8 *mk) | |
1495 | { | |
1496 | struct eap_sim_db_data *data = priv; | |
1497 | struct eap_sim_reauth *r; | |
1498 | ||
29813cfd JM |
1499 | #ifdef CONFIG_SQLITE |
1500 | if (data->sqlite_db) | |
1501 | return db_add_reauth(data, identity, identity_len, | |
e87982ea | 1502 | reauth_id, counter, mk, NULL, NULL, |
29813cfd JM |
1503 | NULL); |
1504 | #endif /* CONFIG_SQLITE */ | |
9881795e JM |
1505 | r = eap_sim_db_add_reauth_data(data, identity, identity_len, reauth_id, |
1506 | counter); | |
1507 | if (r == NULL) | |
1508 | return -1; | |
1509 | ||
6fc6879b | 1510 | os_memcpy(r->mk, mk, EAP_SIM_MK_LEN); |
9881795e JM |
1511 | |
1512 | return 0; | |
1513 | } | |
1514 | ||
1515 | ||
1e5839e0 | 1516 | #ifdef EAP_SERVER_AKA_PRIME |
9881795e JM |
1517 | /** |
1518 | * eap_sim_db_add_reauth_prime - EAP-AKA' DB: Add new re-authentication entry | |
1519 | * @priv: Private data pointer from eap_sim_db_init() | |
1520 | * @identity: Identity of the user (may be permanent identity or pseudonym) | |
1521 | * @identity_len: Length of identity | |
1522 | * @reauth_id: reauth_id for this user. This needs to be an allocated buffer, | |
1523 | * e.g., return value from eap_sim_db_get_next_reauth_id(). Caller must not | |
1524 | * free it. | |
a17df5fb JM |
1525 | * @counter: AT_COUNTER value for fast re-authentication |
1526 | * @k_encr: K_encr from the previous full authentication | |
1527 | * @k_aut: K_aut from the previous full authentication | |
1528 | * @k_re: 32-byte K_re from the previous full authentication | |
9881795e JM |
1529 | * Returns: 0 on success, -1 on failure |
1530 | * | |
1531 | * This function adds a new re-authentication entry for an EAP-AKA' user. | |
1532 | * EAP-SIM DB is responsible of freeing reauth_id buffer once it is not needed | |
1533 | * anymore. | |
1534 | */ | |
1535 | int eap_sim_db_add_reauth_prime(void *priv, const u8 *identity, | |
1536 | size_t identity_len, char *reauth_id, | |
1537 | u16 counter, const u8 *k_encr, const u8 *k_aut, | |
1538 | const u8 *k_re) | |
1539 | { | |
1540 | struct eap_sim_db_data *data = priv; | |
1541 | struct eap_sim_reauth *r; | |
1542 | ||
29813cfd JM |
1543 | #ifdef CONFIG_SQLITE |
1544 | if (data->sqlite_db) | |
1545 | return db_add_reauth(data, identity, identity_len, | |
e87982ea | 1546 | reauth_id, counter, NULL, |
29813cfd JM |
1547 | k_encr, k_aut, k_re); |
1548 | #endif /* CONFIG_SQLITE */ | |
9881795e JM |
1549 | r = eap_sim_db_add_reauth_data(data, identity, identity_len, reauth_id, |
1550 | counter); | |
1551 | if (r == NULL) | |
1552 | return -1; | |
1553 | ||
9881795e JM |
1554 | os_memcpy(r->k_encr, k_encr, EAP_SIM_K_ENCR_LEN); |
1555 | os_memcpy(r->k_aut, k_aut, EAP_AKA_PRIME_K_AUT_LEN); | |
1556 | os_memcpy(r->k_re, k_re, EAP_AKA_PRIME_K_RE_LEN); | |
6fc6879b JM |
1557 | |
1558 | return 0; | |
1559 | } | |
1e5839e0 | 1560 | #endif /* EAP_SERVER_AKA_PRIME */ |
6fc6879b JM |
1561 | |
1562 | ||
1563 | /** | |
1564 | * eap_sim_db_get_permanent - EAP-SIM DB: Get permanent identity | |
1565 | * @priv: Private data pointer from eap_sim_db_init() | |
1566 | * @identity: Identity of the user (may be permanent identity or pseudonym) | |
1567 | * @identity_len: Length of identity | |
1568 | * @len: Buffer for length of the returned permanent identity | |
1569 | * Returns: Pointer to the permanent identity, or %NULL if not found | |
1570 | */ | |
1571 | const u8 * eap_sim_db_get_permanent(void *priv, const u8 *identity, | |
1572 | size_t identity_len, size_t *len) | |
1573 | { | |
1574 | struct eap_sim_db_data *data = priv; | |
1575 | struct eap_sim_pseudonym *p; | |
1576 | ||
1577 | if (identity == NULL) | |
1578 | return NULL; | |
1579 | ||
1580 | p = eap_sim_db_get_pseudonym(data, identity, identity_len); | |
1581 | if (p == NULL) | |
1582 | p = eap_sim_db_get_pseudonym_id(data, identity, identity_len); | |
1583 | if (p == NULL) | |
1584 | return NULL; | |
1585 | ||
1586 | *len = p->identity_len; | |
1587 | return p->identity; | |
1588 | } | |
1589 | ||
1590 | ||
1591 | /** | |
1592 | * eap_sim_db_get_reauth_entry - EAP-SIM DB: Get re-authentication entry | |
1593 | * @priv: Private data pointer from eap_sim_db_init() | |
1594 | * @identity: Identity of the user (may be permanent identity, pseudonym, or | |
1595 | * reauth_id) | |
1596 | * @identity_len: Length of identity | |
6fc6879b JM |
1597 | * Returns: Pointer to the re-auth entry, or %NULL if not found |
1598 | */ | |
1599 | struct eap_sim_reauth * | |
1600 | eap_sim_db_get_reauth_entry(void *priv, const u8 *identity, | |
1601 | size_t identity_len) | |
1602 | { | |
1603 | struct eap_sim_db_data *data = priv; | |
1604 | struct eap_sim_reauth *r; | |
1605 | ||
1606 | if (identity == NULL) | |
1607 | return NULL; | |
1608 | r = eap_sim_db_get_reauth(data, identity, identity_len); | |
1609 | if (r == NULL) | |
1610 | r = eap_sim_db_get_reauth_id(data, identity, identity_len); | |
1611 | return r; | |
1612 | } | |
1613 | ||
1614 | ||
1615 | /** | |
1616 | * eap_sim_db_remove_reauth - EAP-SIM DB: Remove re-authentication entry | |
1617 | * @priv: Private data pointer from eap_sim_db_init() | |
1618 | * @reauth: Pointer to re-authentication entry from | |
1619 | * eap_sim_db_get_reauth_entry() | |
1620 | */ | |
1621 | void eap_sim_db_remove_reauth(void *priv, struct eap_sim_reauth *reauth) | |
1622 | { | |
1623 | struct eap_sim_db_data *data = priv; | |
1624 | struct eap_sim_reauth *r, *prev = NULL; | |
29813cfd JM |
1625 | #ifdef CONFIG_SQLITE |
1626 | if (data->sqlite_db) { | |
1627 | db_remove_reauth(data, reauth); | |
1628 | return; | |
1629 | } | |
1630 | #endif /* CONFIG_SQLITE */ | |
6fc6879b JM |
1631 | r = data->reauths; |
1632 | while (r) { | |
1633 | if (r == reauth) { | |
1634 | if (prev) | |
1635 | prev->next = r->next; | |
1636 | else | |
1637 | data->reauths = r->next; | |
1638 | eap_sim_db_free_reauth(r); | |
1639 | return; | |
1640 | } | |
1641 | prev = r; | |
1642 | r = r->next; | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | ||
1647 | /** | |
1648 | * eap_sim_db_get_aka_auth - Get AKA authentication values | |
1649 | * @priv: Private data pointer from eap_sim_db_init() | |
1650 | * @identity: User name identity | |
1651 | * @identity_len: Length of identity in bytes | |
1652 | * @_rand: Buffer for RAND value | |
1653 | * @autn: Buffer for AUTN value | |
1654 | * @ik: Buffer for IK value | |
1655 | * @ck: Buffer for CK value | |
1656 | * @res: Buffer for RES value | |
1657 | * @res_len: Buffer for RES length | |
1658 | * @cb_session_ctx: Session callback context for get_complete_cb() | |
1659 | * Returns: 0 on success, -1 (EAP_SIM_DB_FAILURE) on error (e.g., user not | |
1660 | * found), or -2 (EAP_SIM_DB_PENDING) if results are not yet available. In this | |
1661 | * case, the callback function registered with eap_sim_db_init() will be | |
1662 | * called once the results become available. | |
1663 | * | |
1664 | * In most cases, the user name is '0' | IMSI, i.e., 0 followed by the IMSI in | |
762e4ce6 | 1665 | * ASCII format for EAP-AKA and '6' | IMSI for EAP-AKA'. |
6fc6879b JM |
1666 | * |
1667 | * When using an external server for AKA authentication, this function can | |
1668 | * always start a request and return EAP_SIM_DB_PENDING immediately if | |
1669 | * authentication triplets are not available. Once the authentication data are | |
1670 | * received, callback function registered with eap_sim_db_init() is called to | |
1671 | * notify EAP state machine to reprocess the message. This | |
1672 | * eap_sim_db_get_aka_auth() function will then be called again and the newly | |
1673 | * received triplets will then be given to the caller. | |
1674 | */ | |
1675 | int eap_sim_db_get_aka_auth(void *priv, const u8 *identity, | |
1676 | size_t identity_len, u8 *_rand, u8 *autn, u8 *ik, | |
1677 | u8 *ck, u8 *res, size_t *res_len, | |
1678 | void *cb_session_ctx) | |
1679 | { | |
1680 | struct eap_sim_db_data *data = priv; | |
1681 | struct eap_sim_db_pending *entry; | |
1682 | int len; | |
1683 | size_t i; | |
1684 | char msg[40]; | |
1685 | ||
1686 | if (identity_len < 2 || identity == NULL || | |
762e4ce6 JM |
1687 | (identity[0] != EAP_AKA_PERMANENT_PREFIX && |
1688 | identity[0] != EAP_AKA_PRIME_PERMANENT_PREFIX)) { | |
6fc6879b JM |
1689 | wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM DB: unexpected identity", |
1690 | identity, identity_len); | |
1691 | return EAP_SIM_DB_FAILURE; | |
1692 | } | |
1693 | identity++; | |
1694 | identity_len--; | |
1695 | for (i = 0; i < identity_len; i++) { | |
1696 | if (identity[i] == '@') { | |
1697 | identity_len = i; | |
1698 | break; | |
1699 | } | |
1700 | } | |
1701 | if (identity_len + 1 > sizeof(entry->imsi)) { | |
1702 | wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM DB: unexpected identity", | |
1703 | identity, identity_len); | |
1704 | return EAP_SIM_DB_FAILURE; | |
1705 | } | |
1706 | wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM DB: Get AKA auth for IMSI", | |
1707 | identity, identity_len); | |
1708 | ||
1709 | entry = eap_sim_db_get_pending(data, identity, identity_len, 1); | |
1710 | if (entry) { | |
1711 | if (entry->state == FAILURE) { | |
1712 | os_free(entry); | |
1713 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Failure"); | |
1714 | return EAP_SIM_DB_FAILURE; | |
1715 | } | |
1716 | ||
1717 | if (entry->state == PENDING) { | |
1718 | eap_sim_db_add_pending(data, entry); | |
1719 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Pending"); | |
1720 | return EAP_SIM_DB_PENDING; | |
1721 | } | |
1722 | ||
1723 | wpa_printf(MSG_DEBUG, "EAP-SIM DB: Returning successfully " | |
1724 | "received authentication data"); | |
1725 | os_memcpy(_rand, entry->u.aka.rand, EAP_AKA_RAND_LEN); | |
1726 | os_memcpy(autn, entry->u.aka.autn, EAP_AKA_AUTN_LEN); | |
1727 | os_memcpy(ik, entry->u.aka.ik, EAP_AKA_IK_LEN); | |
1728 | os_memcpy(ck, entry->u.aka.ck, EAP_AKA_CK_LEN); | |
1729 | os_memcpy(res, entry->u.aka.res, EAP_AKA_RES_MAX_LEN); | |
1730 | *res_len = entry->u.aka.res_len; | |
1731 | os_free(entry); | |
1732 | return 0; | |
1733 | } | |
1734 | ||
1735 | if (data->sock < 0) { | |
1736 | if (eap_sim_db_open_socket(data) < 0) | |
1737 | return EAP_SIM_DB_FAILURE; | |
1738 | } | |
1739 | ||
1740 | len = os_snprintf(msg, sizeof(msg), "AKA-REQ-AUTH "); | |
1741 | if (len < 0 || len + identity_len >= sizeof(msg)) | |
1742 | return EAP_SIM_DB_FAILURE; | |
1743 | os_memcpy(msg + len, identity, identity_len); | |
1744 | len += identity_len; | |
1745 | ||
1746 | wpa_hexdump(MSG_DEBUG, "EAP-SIM DB: requesting AKA authentication " | |
1747 | "data for IMSI", identity, identity_len); | |
1748 | if (eap_sim_db_send(data, msg, len) < 0) | |
1749 | return EAP_SIM_DB_FAILURE; | |
1750 | ||
1751 | entry = os_zalloc(sizeof(*entry)); | |
1752 | if (entry == NULL) | |
1753 | return EAP_SIM_DB_FAILURE; | |
1754 | ||
1755 | os_get_time(&entry->timestamp); | |
1756 | entry->aka = 1; | |
1757 | os_memcpy(entry->imsi, identity, identity_len); | |
1758 | entry->imsi_len = identity_len; | |
1759 | entry->cb_session_ctx = cb_session_ctx; | |
1760 | entry->state = PENDING; | |
1761 | eap_sim_db_add_pending(data, entry); | |
1762 | eap_sim_db_expire_pending(data); | |
1763 | ||
1764 | return EAP_SIM_DB_PENDING; | |
1765 | } | |
1766 | ||
1767 | ||
1768 | /** | |
1769 | * eap_sim_db_resynchronize - Resynchronize AKA AUTN | |
1770 | * @priv: Private data pointer from eap_sim_db_init() | |
1771 | * @identity: User name identity | |
1772 | * @identity_len: Length of identity in bytes | |
1773 | * @auts: AUTS value from the peer | |
1774 | * @_rand: RAND value used in the rejected message | |
1775 | * Returns: 0 on success, -1 on failure | |
1776 | * | |
1777 | * This function is called when the peer reports synchronization failure in the | |
1778 | * AUTN value by sending AUTS. The AUTS and RAND values should be sent to | |
1779 | * HLR/AuC to allow it to resynchronize with the peer. After this, | |
1780 | * eap_sim_db_get_aka_auth() will be called again to to fetch updated | |
1781 | * RAND/AUTN values for the next challenge. | |
1782 | */ | |
1783 | int eap_sim_db_resynchronize(void *priv, const u8 *identity, | |
1784 | size_t identity_len, const u8 *auts, | |
1785 | const u8 *_rand) | |
1786 | { | |
1787 | struct eap_sim_db_data *data = priv; | |
1788 | size_t i; | |
1789 | ||
1790 | if (identity_len < 2 || identity == NULL || | |
762e4ce6 JM |
1791 | (identity[0] != EAP_AKA_PERMANENT_PREFIX && |
1792 | identity[0] != EAP_AKA_PRIME_PERMANENT_PREFIX)) { | |
6fc6879b JM |
1793 | wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM DB: unexpected identity", |
1794 | identity, identity_len); | |
1795 | return -1; | |
1796 | } | |
1797 | identity++; | |
1798 | identity_len--; | |
1799 | for (i = 0; i < identity_len; i++) { | |
1800 | if (identity[i] == '@') { | |
1801 | identity_len = i; | |
1802 | break; | |
1803 | } | |
1804 | } | |
1805 | if (identity_len > 20) { | |
1806 | wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM DB: unexpected identity", | |
1807 | identity, identity_len); | |
1808 | return -1; | |
1809 | } | |
1810 | ||
1811 | if (data->sock >= 0) { | |
1812 | char msg[100]; | |
1813 | int len, ret; | |
1814 | ||
1815 | len = os_snprintf(msg, sizeof(msg), "AKA-AUTS "); | |
1816 | if (len < 0 || len + identity_len >= sizeof(msg)) | |
1817 | return -1; | |
1818 | os_memcpy(msg + len, identity, identity_len); | |
1819 | len += identity_len; | |
1820 | ||
1821 | ret = os_snprintf(msg + len, sizeof(msg) - len, " "); | |
1822 | if (ret < 0 || (size_t) ret >= sizeof(msg) - len) | |
1823 | return -1; | |
1824 | len += ret; | |
1825 | len += wpa_snprintf_hex(msg + len, sizeof(msg) - len, | |
1826 | auts, EAP_AKA_AUTS_LEN); | |
1827 | ret = os_snprintf(msg + len, sizeof(msg) - len, " "); | |
1828 | if (ret < 0 || (size_t) ret >= sizeof(msg) - len) | |
1829 | return -1; | |
1830 | len += ret; | |
1831 | len += wpa_snprintf_hex(msg + len, sizeof(msg) - len, | |
1832 | _rand, EAP_AKA_RAND_LEN); | |
1833 | wpa_hexdump(MSG_DEBUG, "EAP-SIM DB: reporting AKA AUTS for " | |
1834 | "IMSI", identity, identity_len); | |
1835 | if (eap_sim_db_send(data, msg, len) < 0) | |
1836 | return -1; | |
1837 | } | |
1838 | ||
1839 | return 0; | |
1840 | } |