Line data Source code
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 :
23 11 : static void set_user_methods(struct hostapd_eap_user *user, const char *methods)
24 : {
25 : char *buf, *start;
26 : int num_methods;
27 :
28 11 : buf = os_strdup(methods);
29 11 : if (buf == NULL)
30 0 : return;
31 :
32 11 : os_memset(&user->methods, 0, sizeof(user->methods));
33 11 : num_methods = 0;
34 11 : start = buf;
35 28 : while (*start) {
36 17 : char *pos3 = os_strchr(start, ',');
37 17 : if (pos3)
38 6 : *pos3++ = '\0';
39 17 : user->methods[num_methods].method =
40 17 : eap_server_get_type(start,
41 : &user->methods[num_methods].vendor);
42 34 : if (user->methods[num_methods].vendor == EAP_VENDOR_IETF &&
43 17 : user->methods[num_methods].method == EAP_TYPE_NONE) {
44 5 : if (os_strcmp(start, "TTLS-PAP") == 0) {
45 1 : user->ttls_auth |= EAP_TTLS_AUTH_PAP;
46 1 : goto skip_eap;
47 : }
48 4 : if (os_strcmp(start, "TTLS-CHAP") == 0) {
49 1 : user->ttls_auth |= EAP_TTLS_AUTH_CHAP;
50 1 : goto skip_eap;
51 : }
52 3 : if (os_strcmp(start, "TTLS-MSCHAP") == 0) {
53 1 : user->ttls_auth |= EAP_TTLS_AUTH_MSCHAP;
54 1 : goto skip_eap;
55 : }
56 2 : if (os_strcmp(start, "TTLS-MSCHAPV2") == 0) {
57 2 : user->ttls_auth |= EAP_TTLS_AUTH_MSCHAPV2;
58 2 : goto skip_eap;
59 : }
60 0 : wpa_printf(MSG_INFO, "DB: Unsupported EAP type '%s'",
61 : start);
62 0 : os_free(buf);
63 0 : return;
64 : }
65 :
66 12 : num_methods++;
67 12 : if (num_methods >= EAP_MAX_METHODS)
68 0 : break;
69 : skip_eap:
70 17 : if (pos3 == NULL)
71 11 : break;
72 6 : start = pos3;
73 : }
74 :
75 11 : os_free(buf);
76 : }
77 :
78 :
79 5 : static int get_user_cb(void *ctx, int argc, char *argv[], char *col[])
80 : {
81 5 : struct hostapd_eap_user *user = ctx;
82 : int i;
83 :
84 30 : for (i = 0; i < argc; i++) {
85 25 : if (os_strcmp(col[i], "password") == 0 && argv[i]) {
86 5 : os_free(user->password);
87 5 : user->password_len = os_strlen(argv[i]);
88 5 : user->password = (u8 *) os_strdup(argv[i]);
89 5 : user->next = (void *) 1;
90 20 : } else if (os_strcmp(col[i], "methods") == 0 && argv[i]) {
91 5 : set_user_methods(user, argv[i]);
92 15 : } else if (os_strcmp(col[i], "remediation") == 0 && argv[i]) {
93 1 : user->remediation = strlen(argv[i]) > 0;
94 : }
95 : }
96 :
97 5 : return 0;
98 : }
99 :
100 :
101 6 : static int get_wildcard_cb(void *ctx, int argc, char *argv[], char *col[])
102 : {
103 6 : struct hostapd_eap_user *user = ctx;
104 6 : int i, id = -1, methods = -1;
105 : size_t len;
106 :
107 18 : for (i = 0; i < argc; i++) {
108 12 : if (os_strcmp(col[i], "identity") == 0 && argv[i])
109 6 : id = i;
110 6 : else if (os_strcmp(col[i], "methods") == 0 && argv[i])
111 6 : methods = i;
112 : }
113 :
114 6 : if (id < 0 || methods < 0)
115 0 : return 0;
116 :
117 6 : len = os_strlen(argv[id]);
118 12 : if (len <= user->identity_len &&
119 12 : os_memcmp(argv[id], user->identity, len) == 0 &&
120 6 : (user->password == NULL || len > user->password_len)) {
121 6 : os_free(user->password);
122 6 : user->password_len = os_strlen(argv[id]);
123 6 : user->password = (u8 *) os_strdup(argv[id]);
124 6 : user->next = (void *) 1;
125 6 : set_user_methods(user, argv[methods]);
126 : }
127 :
128 6 : return 0;
129 : }
130 :
131 :
132 : static const struct hostapd_eap_user *
133 11 : eap_user_sqlite_get(struct hostapd_data *hapd, const u8 *identity,
134 : size_t identity_len, int phase2)
135 : {
136 : sqlite3 *db;
137 11 : struct hostapd_eap_user *user = NULL;
138 : char id_str[256], cmd[300];
139 : size_t i;
140 :
141 11 : if (identity_len >= sizeof(id_str))
142 0 : return NULL;
143 11 : os_memcpy(id_str, identity, identity_len);
144 11 : id_str[identity_len] = '\0';
145 123 : for (i = 0; i < identity_len; i++) {
146 112 : if (id_str[i] >= 'a' && id_str[i] <= 'z')
147 101 : continue;
148 11 : if (id_str[i] >= 'A' && id_str[i] <= 'Z')
149 0 : continue;
150 11 : if (id_str[i] >= '0' && id_str[i] <= '9')
151 2 : continue;
152 11 : if (id_str[i] == '-' || id_str[i] == '_' || id_str[i] == '.' ||
153 4 : id_str[i] == ',' || id_str[i] == '@' || id_str[i] == '\\' ||
154 0 : id_str[i] == '!' || id_str[i] == '#' || id_str[i] == '%' ||
155 0 : id_str[i] == '=' || id_str[i] == ' ')
156 9 : continue;
157 0 : wpa_printf(MSG_INFO, "DB: Unsupported character in identity");
158 0 : return NULL;
159 : }
160 :
161 11 : os_free(hapd->tmp_eap_user.identity);
162 11 : os_free(hapd->tmp_eap_user.password);
163 11 : os_memset(&hapd->tmp_eap_user, 0, sizeof(hapd->tmp_eap_user));
164 11 : hapd->tmp_eap_user.phase2 = phase2;
165 11 : hapd->tmp_eap_user.identity = os_zalloc(identity_len + 1);
166 11 : if (hapd->tmp_eap_user.identity == NULL)
167 0 : return NULL;
168 11 : os_memcpy(hapd->tmp_eap_user.identity, identity, identity_len);
169 :
170 11 : if (sqlite3_open(hapd->conf->eap_user_sqlite, &db)) {
171 0 : wpa_printf(MSG_INFO, "DB: Failed to open database %s: %s",
172 0 : hapd->conf->eap_user_sqlite, sqlite3_errmsg(db));
173 0 : sqlite3_close(db);
174 0 : return NULL;
175 : }
176 :
177 11 : os_snprintf(cmd, sizeof(cmd),
178 : "SELECT * FROM users WHERE identity='%s' AND phase2=%d;",
179 : id_str, phase2);
180 11 : wpa_printf(MSG_DEBUG, "DB: %s", cmd);
181 11 : if (sqlite3_exec(db, cmd, get_user_cb, &hapd->tmp_eap_user, NULL) !=
182 : SQLITE_OK) {
183 0 : wpa_printf(MSG_DEBUG, "DB: Failed to complete SQL operation");
184 11 : } else if (hapd->tmp_eap_user.next)
185 5 : user = &hapd->tmp_eap_user;
186 :
187 11 : if (user == NULL && !phase2) {
188 6 : os_snprintf(cmd, sizeof(cmd),
189 : "SELECT identity,methods FROM wildcards;");
190 6 : wpa_printf(MSG_DEBUG, "DB: %s", cmd);
191 6 : if (sqlite3_exec(db, cmd, get_wildcard_cb, &hapd->tmp_eap_user,
192 : NULL) != SQLITE_OK) {
193 0 : wpa_printf(MSG_DEBUG, "DB: Failed to complete SQL "
194 : "operation");
195 6 : } else if (hapd->tmp_eap_user.next) {
196 6 : user = &hapd->tmp_eap_user;
197 6 : os_free(user->identity);
198 6 : user->identity = user->password;
199 6 : user->identity_len = user->password_len;
200 6 : user->password = NULL;
201 6 : user->password_len = 0;
202 : }
203 : }
204 :
205 11 : sqlite3_close(db);
206 :
207 11 : return user;
208 : }
209 :
210 : #endif /* CONFIG_SQLITE */
211 :
212 :
213 : const struct hostapd_eap_user *
214 1052 : hostapd_get_eap_user(struct hostapd_data *hapd, const u8 *identity,
215 : size_t identity_len, int phase2)
216 : {
217 1052 : const struct hostapd_bss_config *conf = hapd->conf;
218 1052 : struct hostapd_eap_user *user = conf->eap_user;
219 :
220 : #ifdef CONFIG_WPS
221 1214 : if (conf->wps_state && identity_len == WSC_ID_ENROLLEE_LEN &&
222 162 : os_memcmp(identity, WSC_ID_ENROLLEE, WSC_ID_ENROLLEE_LEN) == 0) {
223 : static struct hostapd_eap_user wsc_enrollee;
224 162 : os_memset(&wsc_enrollee, 0, sizeof(wsc_enrollee));
225 162 : wsc_enrollee.methods[0].method = eap_server_get_type(
226 : "WSC", &wsc_enrollee.methods[0].vendor);
227 162 : return &wsc_enrollee;
228 : }
229 :
230 928 : if (conf->wps_state && identity_len == WSC_ID_REGISTRAR_LEN &&
231 38 : os_memcmp(identity, WSC_ID_REGISTRAR, WSC_ID_REGISTRAR_LEN) == 0) {
232 : static struct hostapd_eap_user wsc_registrar;
233 38 : os_memset(&wsc_registrar, 0, sizeof(wsc_registrar));
234 38 : wsc_registrar.methods[0].method = eap_server_get_type(
235 : "WSC", &wsc_registrar.methods[0].vendor);
236 38 : wsc_registrar.password = (u8 *) conf->ap_pin;
237 76 : wsc_registrar.password_len = conf->ap_pin ?
238 38 : os_strlen(conf->ap_pin) : 0;
239 38 : return &wsc_registrar;
240 : }
241 : #endif /* CONFIG_WPS */
242 :
243 22426 : while (user) {
244 21562 : if (!phase2 && user->identity == NULL) {
245 : /* Wildcard match */
246 335 : break;
247 : }
248 :
249 26137 : if (user->phase2 == !!phase2 && user->wildcard_prefix &&
250 9820 : identity_len >= user->identity_len &&
251 4910 : os_memcmp(user->identity, identity, user->identity_len) ==
252 : 0) {
253 : /* Wildcard prefix match */
254 126 : break;
255 : }
256 :
257 37612 : if (user->phase2 == !!phase2 &&
258 17881 : user->identity_len == identity_len &&
259 1370 : os_memcmp(user->identity, identity, identity_len) == 0)
260 379 : break;
261 20722 : user = user->next;
262 : }
263 :
264 : #ifdef CONFIG_SQLITE
265 852 : if (user == NULL && conf->eap_user_sqlite) {
266 11 : return eap_user_sqlite_get(hapd, identity, identity_len,
267 : phase2);
268 : }
269 : #endif /* CONFIG_SQLITE */
270 :
271 841 : return user;
272 : }
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