1 /*
2 * hostapd / EAP user database
3 * Copyright (c) 2012, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10 #ifdef CONFIG_SQLITE
11 #include <sqlite3.h>
12 #endif /* CONFIG_SQLITE */
13
14 #include "common.h"
15 #include "eap_common/eap_wsc_common.h"
16 #include "eap_server/eap_methods.h"
17 #include "eap_server/eap.h"
18 #include "ap_config.h"
19 #include "hostapd.h"
20
21 #ifdef CONFIG_SQLITE
22
set_user_methods(struct hostapd_eap_user * user,const char * methods)23 static void set_user_methods(struct hostapd_eap_user *user, const char *methods)
24 {
25 char *buf, *start;
26 int num_methods;
27
28 buf = os_strdup(methods);
29 if (buf == NULL)
30 return;
31
32 os_memset(&user->methods, 0, sizeof(user->methods));
33 num_methods = 0;
34 start = buf;
35 while (*start) {
36 char *pos3 = os_strchr(start, ',');
37 if (pos3)
38 *pos3++ = '\0';
39 user->methods[num_methods].method =
40 eap_server_get_type(start,
41 &user->methods[num_methods].vendor);
42 if (user->methods[num_methods].vendor == EAP_VENDOR_IETF &&
43 user->methods[num_methods].method == EAP_TYPE_NONE) {
44 if (os_strcmp(start, "TTLS-PAP") == 0) {
45 user->ttls_auth |= EAP_TTLS_AUTH_PAP;
46 goto skip_eap;
47 }
48 if (os_strcmp(start, "TTLS-CHAP") == 0) {
49 user->ttls_auth |= EAP_TTLS_AUTH_CHAP;
50 goto skip_eap;
51 }
52 if (os_strcmp(start, "TTLS-MSCHAP") == 0) {
53 user->ttls_auth |= EAP_TTLS_AUTH_MSCHAP;
54 goto skip_eap;
55 }
56 if (os_strcmp(start, "TTLS-MSCHAPV2") == 0) {
57 user->ttls_auth |= EAP_TTLS_AUTH_MSCHAPV2;
58 goto skip_eap;
59 }
60 wpa_printf(MSG_INFO, "DB: Unsupported EAP type '%s'",
61 start);
62 os_free(buf);
63 return;
64 }
65
66 num_methods++;
67 if (num_methods >= EAP_MAX_METHODS)
68 break;
69 skip_eap:
70 if (pos3 == NULL)
71 break;
72 start = pos3;
73 }
74
75 os_free(buf);
76 }
77
78
get_user_cb(void * ctx,int argc,char * argv[],char * col[])79 static int get_user_cb(void *ctx, int argc, char *argv[], char *col[])
80 {
81 struct hostapd_eap_user *user = ctx;
82 int i;
83
84 for (i = 0; i < argc; i++) {
85 if (os_strcmp(col[i], "password") == 0 && argv[i]) {
86 bin_clear_free(user->password, user->password_len);
87 user->password_len = os_strlen(argv[i]);
88 user->password = (u8 *) os_strdup(argv[i]);
89 user->next = (void *) 1;
90 } else if (os_strcmp(col[i], "methods") == 0 && argv[i]) {
91 set_user_methods(user, argv[i]);
92 } else if (os_strcmp(col[i], "remediation") == 0 && argv[i]) {
93 user->remediation = strlen(argv[i]) > 0;
94 }
95 }
96
97 return 0;
98 }
99
100
get_wildcard_cb(void * ctx,int argc,char * argv[],char * col[])101 static int get_wildcard_cb(void *ctx, int argc, char *argv[], char *col[])
102 {
103 struct hostapd_eap_user *user = ctx;
104 int i, id = -1, methods = -1;
105 size_t len;
106
107 for (i = 0; i < argc; i++) {
108 if (os_strcmp(col[i], "identity") == 0 && argv[i])
109 id = i;
110 else if (os_strcmp(col[i], "methods") == 0 && argv[i])
111 methods = i;
112 }
113
114 if (id < 0 || methods < 0)
115 return 0;
116
117 len = os_strlen(argv[id]);
118 if (len <= user->identity_len &&
119 os_memcmp(argv[id], user->identity, len) == 0 &&
120 (user->password == NULL || len > user->password_len)) {
121 bin_clear_free(user->password, user->password_len);
122 user->password_len = os_strlen(argv[id]);
123 user->password = (u8 *) os_strdup(argv[id]);
124 user->next = (void *) 1;
125 set_user_methods(user, argv[methods]);
126 }
127
128 return 0;
129 }
130
131
132 static const struct hostapd_eap_user *
eap_user_sqlite_get(struct hostapd_data * hapd,const u8 * identity,size_t identity_len,int phase2)133 eap_user_sqlite_get(struct hostapd_data *hapd, const u8 *identity,
134 size_t identity_len, int phase2)
135 {
136 sqlite3 *db;
137 struct hostapd_eap_user *user = NULL;
138 char id_str[256], cmd[300];
139 size_t i;
140
141 if (identity_len >= sizeof(id_str)) {
142 wpa_printf(MSG_DEBUG, "%s: identity len too big: %d >= %d",
143 __func__, (int) identity_len,
144 (int) (sizeof(id_str)));
145 return NULL;
146 }
147 os_memcpy(id_str, identity, identity_len);
148 id_str[identity_len] = '\0';
149 for (i = 0; i < identity_len; i++) {
150 if (id_str[i] >= 'a' && id_str[i] <= 'z')
151 continue;
152 if (id_str[i] >= 'A' && id_str[i] <= 'Z')
153 continue;
154 if (id_str[i] >= '0' && id_str[i] <= '9')
155 continue;
156 if (id_str[i] == '-' || id_str[i] == '_' || id_str[i] == '.' ||
157 id_str[i] == ',' || id_str[i] == '@' || id_str[i] == '\\' ||
158 id_str[i] == '!' || id_str[i] == '#' || id_str[i] == '%' ||
159 id_str[i] == '=' || id_str[i] == ' ')
160 continue;
161 wpa_printf(MSG_INFO, "DB: Unsupported character in identity");
162 return NULL;
163 }
164
165 bin_clear_free(hapd->tmp_eap_user.identity,
166 hapd->tmp_eap_user.identity_len);
167 bin_clear_free(hapd->tmp_eap_user.password,
168 hapd->tmp_eap_user.password_len);
169 os_memset(&hapd->tmp_eap_user, 0, sizeof(hapd->tmp_eap_user));
170 hapd->tmp_eap_user.phase2 = phase2;
171 hapd->tmp_eap_user.identity = os_zalloc(identity_len + 1);
172 if (hapd->tmp_eap_user.identity == NULL)
173 return NULL;
174 os_memcpy(hapd->tmp_eap_user.identity, identity, identity_len);
175
176 if (sqlite3_open(hapd->conf->eap_user_sqlite, &db)) {
177 wpa_printf(MSG_INFO, "DB: Failed to open database %s: %s",
178 hapd->conf->eap_user_sqlite, sqlite3_errmsg(db));
179 sqlite3_close(db);
180 return NULL;
181 }
182
183 os_snprintf(cmd, sizeof(cmd),
184 "SELECT * FROM users WHERE identity='%s' AND phase2=%d;",
185 id_str, phase2);
186 wpa_printf(MSG_DEBUG, "DB: %s", cmd);
187 if (sqlite3_exec(db, cmd, get_user_cb, &hapd->tmp_eap_user, NULL) !=
188 SQLITE_OK) {
189 wpa_printf(MSG_DEBUG,
190 "DB: Failed to complete SQL operation: %s db: %s",
191 sqlite3_errmsg(db), hapd->conf->eap_user_sqlite);
192 } else if (hapd->tmp_eap_user.next)
193 user = &hapd->tmp_eap_user;
194
195 if (user == NULL && !phase2) {
196 os_snprintf(cmd, sizeof(cmd),
197 "SELECT identity,methods FROM wildcards;");
198 wpa_printf(MSG_DEBUG, "DB: %s", cmd);
199 if (sqlite3_exec(db, cmd, get_wildcard_cb, &hapd->tmp_eap_user,
200 NULL) != SQLITE_OK) {
201 wpa_printf(MSG_DEBUG,
202 "DB: Failed to complete SQL operation: %s db: %s",
203 sqlite3_errmsg(db),
204 hapd->conf->eap_user_sqlite);
205 } else if (hapd->tmp_eap_user.next) {
206 user = &hapd->tmp_eap_user;
207 os_free(user->identity);
208 user->identity = user->password;
209 user->identity_len = user->password_len;
210 user->password = NULL;
211 user->password_len = 0;
212 }
213 }
214
215 sqlite3_close(db);
216
217 return user;
218 }
219
220 #endif /* CONFIG_SQLITE */
221
222
223 const struct hostapd_eap_user *
hostapd_get_eap_user(struct hostapd_data * hapd,const u8 * identity,size_t identity_len,int phase2)224 hostapd_get_eap_user(struct hostapd_data *hapd, const u8 *identity,
225 size_t identity_len, int phase2)
226 {
227 const struct hostapd_bss_config *conf = hapd->conf;
228 struct hostapd_eap_user *user = conf->eap_user;
229
230 #ifdef CONFIG_WPS
231 if (conf->wps_state && identity_len == WSC_ID_ENROLLEE_LEN &&
232 os_memcmp(identity, WSC_ID_ENROLLEE, WSC_ID_ENROLLEE_LEN) == 0) {
233 static struct hostapd_eap_user wsc_enrollee;
234 os_memset(&wsc_enrollee, 0, sizeof(wsc_enrollee));
235 wsc_enrollee.methods[0].method = eap_server_get_type(
236 "WSC", &wsc_enrollee.methods[0].vendor);
237 return &wsc_enrollee;
238 }
239
240 if (conf->wps_state && identity_len == WSC_ID_REGISTRAR_LEN &&
241 os_memcmp(identity, WSC_ID_REGISTRAR, WSC_ID_REGISTRAR_LEN) == 0) {
242 static struct hostapd_eap_user wsc_registrar;
243 os_memset(&wsc_registrar, 0, sizeof(wsc_registrar));
244 wsc_registrar.methods[0].method = eap_server_get_type(
245 "WSC", &wsc_registrar.methods[0].vendor);
246 wsc_registrar.password = (u8 *) conf->ap_pin;
247 wsc_registrar.password_len = conf->ap_pin ?
248 os_strlen(conf->ap_pin) : 0;
249 return &wsc_registrar;
250 }
251 #endif /* CONFIG_WPS */
252
253 while (user) {
254 if (!phase2 && user->identity == NULL) {
255 /* Wildcard match */
256 break;
257 }
258
259 if (user->phase2 == !!phase2 && user->wildcard_prefix &&
260 identity_len >= user->identity_len &&
261 os_memcmp(user->identity, identity, user->identity_len) ==
262 0) {
263 /* Wildcard prefix match */
264 break;
265 }
266
267 if (user->phase2 == !!phase2 &&
268 user->identity_len == identity_len &&
269 os_memcmp(user->identity, identity, identity_len) == 0)
270 break;
271 user = user->next;
272 }
273
274 #ifdef CONFIG_SQLITE
275 if (user == NULL && conf->eap_user_sqlite) {
276 return eap_user_sqlite_get(hapd, identity, identity_len,
277 phase2);
278 }
279 #endif /* CONFIG_SQLITE */
280
281 return user;
282 }
283