1/*
2 * Wi-Fi Protected Setup - common functionality
3 * Copyright (c) 2008-2012, 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
11#include "common.h"
12#include "common/defs.h"
13#include "common/ieee802_11_common.h"
14#include "crypto/aes_wrap.h"
15#include "crypto/crypto.h"
16#include "crypto/dh_group5.h"
17#include "crypto/sha1.h"
18#include "crypto/sha256.h"
19#include "crypto/random.h"
20#include "wps_i.h"
21#include "wps_dev_attr.h"
22
23
24void wps_kdf(const u8 *key, const u8 *label_prefix, size_t label_prefix_len,
25 const char *label, u8 *res, size_t res_len)
26{
27 u8 i_buf[4], key_bits[4];
28 const u8 *addr[4];
29 size_t len[4];
30 int i, iter;
31 u8 hash[SHA256_MAC_LEN], *opos;
32 size_t left;
33
34 WPA_PUT_BE32(key_bits, res_len * 8);
35
36 addr[0] = i_buf;
37 len[0] = sizeof(i_buf);
38 addr[1] = label_prefix;
39 len[1] = label_prefix_len;
40 addr[2] = (const u8 *) label;
41 len[2] = os_strlen(label);
42 addr[3] = key_bits;
43 len[3] = sizeof(key_bits);
44
45 iter = (res_len + SHA256_MAC_LEN - 1) / SHA256_MAC_LEN;
46 opos = res;
47 left = res_len;
48
49 for (i = 1; i <= iter; i++) {
50 WPA_PUT_BE32(i_buf, i);
51 hmac_sha256_vector(key, SHA256_MAC_LEN, 4, addr, len, hash);
52 if (i < iter) {
53 os_memcpy(opos, hash, SHA256_MAC_LEN);
54 opos += SHA256_MAC_LEN;
55 left -= SHA256_MAC_LEN;
56 } else
57 os_memcpy(opos, hash, left);
58 }
59}
60
61
62int wps_derive_keys(struct wps_data *wps)
63{
64 struct wpabuf *pubkey, *dh_shared;
65 u8 dhkey[SHA256_MAC_LEN], kdk[SHA256_MAC_LEN];
66 const u8 *addr[3];
67 size_t len[3];
68 u8 keys[WPS_AUTHKEY_LEN + WPS_KEYWRAPKEY_LEN + WPS_EMSK_LEN];
69
70 if (wps->dh_privkey == NULL) {
71 wpa_printf(MSG_DEBUG, "WPS: Own DH private key not available");
72 return -1;
73 }
74
75 pubkey = wps->registrar ? wps->dh_pubkey_e : wps->dh_pubkey_r;
76 if (pubkey == NULL) {
77 wpa_printf(MSG_DEBUG, "WPS: Peer DH public key not available");
78 return -1;
79 }
80
81 wpa_hexdump_buf_key(MSG_DEBUG, "WPS: DH Private Key", wps->dh_privkey);
82 wpa_hexdump_buf(MSG_DEBUG, "WPS: DH peer Public Key", pubkey);
83 dh_shared = dh5_derive_shared(wps->dh_ctx, pubkey, wps->dh_privkey);
84 dh5_free(wps->dh_ctx);
85 wps->dh_ctx = NULL;
86 dh_shared = wpabuf_zeropad(dh_shared, 192);
87 if (dh_shared == NULL) {
88 wpa_printf(MSG_DEBUG, "WPS: Failed to derive DH shared key");
89 return -1;
90 }
91
92 /* Own DH private key is not needed anymore */
| 1/*
2 * Wi-Fi Protected Setup - common functionality
3 * Copyright (c) 2008-2012, 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
11#include "common.h"
12#include "common/defs.h"
13#include "common/ieee802_11_common.h"
14#include "crypto/aes_wrap.h"
15#include "crypto/crypto.h"
16#include "crypto/dh_group5.h"
17#include "crypto/sha1.h"
18#include "crypto/sha256.h"
19#include "crypto/random.h"
20#include "wps_i.h"
21#include "wps_dev_attr.h"
22
23
24void wps_kdf(const u8 *key, const u8 *label_prefix, size_t label_prefix_len,
25 const char *label, u8 *res, size_t res_len)
26{
27 u8 i_buf[4], key_bits[4];
28 const u8 *addr[4];
29 size_t len[4];
30 int i, iter;
31 u8 hash[SHA256_MAC_LEN], *opos;
32 size_t left;
33
34 WPA_PUT_BE32(key_bits, res_len * 8);
35
36 addr[0] = i_buf;
37 len[0] = sizeof(i_buf);
38 addr[1] = label_prefix;
39 len[1] = label_prefix_len;
40 addr[2] = (const u8 *) label;
41 len[2] = os_strlen(label);
42 addr[3] = key_bits;
43 len[3] = sizeof(key_bits);
44
45 iter = (res_len + SHA256_MAC_LEN - 1) / SHA256_MAC_LEN;
46 opos = res;
47 left = res_len;
48
49 for (i = 1; i <= iter; i++) {
50 WPA_PUT_BE32(i_buf, i);
51 hmac_sha256_vector(key, SHA256_MAC_LEN, 4, addr, len, hash);
52 if (i < iter) {
53 os_memcpy(opos, hash, SHA256_MAC_LEN);
54 opos += SHA256_MAC_LEN;
55 left -= SHA256_MAC_LEN;
56 } else
57 os_memcpy(opos, hash, left);
58 }
59}
60
61
62int wps_derive_keys(struct wps_data *wps)
63{
64 struct wpabuf *pubkey, *dh_shared;
65 u8 dhkey[SHA256_MAC_LEN], kdk[SHA256_MAC_LEN];
66 const u8 *addr[3];
67 size_t len[3];
68 u8 keys[WPS_AUTHKEY_LEN + WPS_KEYWRAPKEY_LEN + WPS_EMSK_LEN];
69
70 if (wps->dh_privkey == NULL) {
71 wpa_printf(MSG_DEBUG, "WPS: Own DH private key not available");
72 return -1;
73 }
74
75 pubkey = wps->registrar ? wps->dh_pubkey_e : wps->dh_pubkey_r;
76 if (pubkey == NULL) {
77 wpa_printf(MSG_DEBUG, "WPS: Peer DH public key not available");
78 return -1;
79 }
80
81 wpa_hexdump_buf_key(MSG_DEBUG, "WPS: DH Private Key", wps->dh_privkey);
82 wpa_hexdump_buf(MSG_DEBUG, "WPS: DH peer Public Key", pubkey);
83 dh_shared = dh5_derive_shared(wps->dh_ctx, pubkey, wps->dh_privkey);
84 dh5_free(wps->dh_ctx);
85 wps->dh_ctx = NULL;
86 dh_shared = wpabuf_zeropad(dh_shared, 192);
87 if (dh_shared == NULL) {
88 wpa_printf(MSG_DEBUG, "WPS: Failed to derive DH shared key");
89 return -1;
90 }
91
92 /* Own DH private key is not needed anymore */
|
93 wpabuf_free(wps->dh_privkey);
| 93 wpabuf_clear_free(wps->dh_privkey);
|
94 wps->dh_privkey = NULL;
95
96 wpa_hexdump_buf_key(MSG_DEBUG, "WPS: DH shared key", dh_shared);
97
98 /* DHKey = SHA-256(g^AB mod p) */
99 addr[0] = wpabuf_head(dh_shared);
100 len[0] = wpabuf_len(dh_shared);
101 sha256_vector(1, addr, len, dhkey);
102 wpa_hexdump_key(MSG_DEBUG, "WPS: DHKey", dhkey, sizeof(dhkey));
| 94 wps->dh_privkey = NULL;
95
96 wpa_hexdump_buf_key(MSG_DEBUG, "WPS: DH shared key", dh_shared);
97
98 /* DHKey = SHA-256(g^AB mod p) */
99 addr[0] = wpabuf_head(dh_shared);
100 len[0] = wpabuf_len(dh_shared);
101 sha256_vector(1, addr, len, dhkey);
102 wpa_hexdump_key(MSG_DEBUG, "WPS: DHKey", dhkey, sizeof(dhkey));
|
103 wpabuf_free(dh_shared);
| 103 wpabuf_clear_free(dh_shared);
|
104
105 /* KDK = HMAC-SHA-256_DHKey(N1 || EnrolleeMAC || N2) */
106 addr[0] = wps->nonce_e;
107 len[0] = WPS_NONCE_LEN;
108 addr[1] = wps->mac_addr_e;
109 len[1] = ETH_ALEN;
110 addr[2] = wps->nonce_r;
111 len[2] = WPS_NONCE_LEN;
112 hmac_sha256_vector(dhkey, sizeof(dhkey), 3, addr, len, kdk);
113 wpa_hexdump_key(MSG_DEBUG, "WPS: KDK", kdk, sizeof(kdk));
114
115 wps_kdf(kdk, NULL, 0, "Wi-Fi Easy and Secure Key Derivation",
116 keys, sizeof(keys));
117 os_memcpy(wps->authkey, keys, WPS_AUTHKEY_LEN);
118 os_memcpy(wps->keywrapkey, keys + WPS_AUTHKEY_LEN, WPS_KEYWRAPKEY_LEN);
119 os_memcpy(wps->emsk, keys + WPS_AUTHKEY_LEN + WPS_KEYWRAPKEY_LEN,
120 WPS_EMSK_LEN);
121
122 wpa_hexdump_key(MSG_DEBUG, "WPS: AuthKey",
123 wps->authkey, WPS_AUTHKEY_LEN);
124 wpa_hexdump_key(MSG_DEBUG, "WPS: KeyWrapKey",
125 wps->keywrapkey, WPS_KEYWRAPKEY_LEN);
126 wpa_hexdump_key(MSG_DEBUG, "WPS: EMSK", wps->emsk, WPS_EMSK_LEN);
127
128 return 0;
129}
130
131
| 104
105 /* KDK = HMAC-SHA-256_DHKey(N1 || EnrolleeMAC || N2) */
106 addr[0] = wps->nonce_e;
107 len[0] = WPS_NONCE_LEN;
108 addr[1] = wps->mac_addr_e;
109 len[1] = ETH_ALEN;
110 addr[2] = wps->nonce_r;
111 len[2] = WPS_NONCE_LEN;
112 hmac_sha256_vector(dhkey, sizeof(dhkey), 3, addr, len, kdk);
113 wpa_hexdump_key(MSG_DEBUG, "WPS: KDK", kdk, sizeof(kdk));
114
115 wps_kdf(kdk, NULL, 0, "Wi-Fi Easy and Secure Key Derivation",
116 keys, sizeof(keys));
117 os_memcpy(wps->authkey, keys, WPS_AUTHKEY_LEN);
118 os_memcpy(wps->keywrapkey, keys + WPS_AUTHKEY_LEN, WPS_KEYWRAPKEY_LEN);
119 os_memcpy(wps->emsk, keys + WPS_AUTHKEY_LEN + WPS_KEYWRAPKEY_LEN,
120 WPS_EMSK_LEN);
121
122 wpa_hexdump_key(MSG_DEBUG, "WPS: AuthKey",
123 wps->authkey, WPS_AUTHKEY_LEN);
124 wpa_hexdump_key(MSG_DEBUG, "WPS: KeyWrapKey",
125 wps->keywrapkey, WPS_KEYWRAPKEY_LEN);
126 wpa_hexdump_key(MSG_DEBUG, "WPS: EMSK", wps->emsk, WPS_EMSK_LEN);
127
128 return 0;
129}
130
131
|
132void wps_derive_psk(struct wps_data *wps, const u8 *dev_passwd,
133 size_t dev_passwd_len)
| 132int wps_derive_psk(struct wps_data *wps, const u8 *dev_passwd,
133 size_t dev_passwd_len)
|
134{
135 u8 hash[SHA256_MAC_LEN];
136
| 134{
135 u8 hash[SHA256_MAC_LEN];
136
|
137 hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN, dev_passwd,
138 (dev_passwd_len + 1) / 2, hash);
| 137 if (hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN, dev_passwd,
138 (dev_passwd_len + 1) / 2, hash) < 0)
139 return -1;
|
139 os_memcpy(wps->psk1, hash, WPS_PSK_LEN);
| 140 os_memcpy(wps->psk1, hash, WPS_PSK_LEN);
|
140 hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN,
141 dev_passwd + (dev_passwd_len + 1) / 2,
142 dev_passwd_len / 2, hash);
| 141 if (hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN,
142 dev_passwd + (dev_passwd_len + 1) / 2,
143 dev_passwd_len / 2, hash) < 0)
144 return -1;
|
143 os_memcpy(wps->psk2, hash, WPS_PSK_LEN);
144
145 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Device Password",
146 dev_passwd, dev_passwd_len);
147 wpa_hexdump_key(MSG_DEBUG, "WPS: PSK1", wps->psk1, WPS_PSK_LEN);
148 wpa_hexdump_key(MSG_DEBUG, "WPS: PSK2", wps->psk2, WPS_PSK_LEN);
| 145 os_memcpy(wps->psk2, hash, WPS_PSK_LEN);
146
147 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Device Password",
148 dev_passwd, dev_passwd_len);
149 wpa_hexdump_key(MSG_DEBUG, "WPS: PSK1", wps->psk1, WPS_PSK_LEN);
150 wpa_hexdump_key(MSG_DEBUG, "WPS: PSK2", wps->psk2, WPS_PSK_LEN);
|
| 151 return 0;
|
149}
150
151
152struct wpabuf * wps_decrypt_encr_settings(struct wps_data *wps, const u8 *encr,
153 size_t encr_len)
154{
155 struct wpabuf *decrypted;
156 const size_t block_size = 16;
157 size_t i;
158 u8 pad;
159 const u8 *pos;
160
161 /* AES-128-CBC */
162 if (encr == NULL || encr_len < 2 * block_size || encr_len % block_size)
163 {
164 wpa_printf(MSG_DEBUG, "WPS: No Encrypted Settings received");
165 return NULL;
166 }
167
168 decrypted = wpabuf_alloc(encr_len - block_size);
169 if (decrypted == NULL)
170 return NULL;
171
172 wpa_hexdump(MSG_MSGDUMP, "WPS: Encrypted Settings", encr, encr_len);
173 wpabuf_put_data(decrypted, encr + block_size, encr_len - block_size);
174 if (aes_128_cbc_decrypt(wps->keywrapkey, encr, wpabuf_mhead(decrypted),
175 wpabuf_len(decrypted))) {
| 152}
153
154
155struct wpabuf * wps_decrypt_encr_settings(struct wps_data *wps, const u8 *encr,
156 size_t encr_len)
157{
158 struct wpabuf *decrypted;
159 const size_t block_size = 16;
160 size_t i;
161 u8 pad;
162 const u8 *pos;
163
164 /* AES-128-CBC */
165 if (encr == NULL || encr_len < 2 * block_size || encr_len % block_size)
166 {
167 wpa_printf(MSG_DEBUG, "WPS: No Encrypted Settings received");
168 return NULL;
169 }
170
171 decrypted = wpabuf_alloc(encr_len - block_size);
172 if (decrypted == NULL)
173 return NULL;
174
175 wpa_hexdump(MSG_MSGDUMP, "WPS: Encrypted Settings", encr, encr_len);
176 wpabuf_put_data(decrypted, encr + block_size, encr_len - block_size);
177 if (aes_128_cbc_decrypt(wps->keywrapkey, encr, wpabuf_mhead(decrypted),
178 wpabuf_len(decrypted))) {
|
176 wpabuf_free(decrypted);
| 179 wpabuf_clear_free(decrypted);
|
177 return NULL;
178 }
179
180 wpa_hexdump_buf_key(MSG_MSGDUMP, "WPS: Decrypted Encrypted Settings",
181 decrypted);
182
183 pos = wpabuf_head_u8(decrypted) + wpabuf_len(decrypted) - 1;
184 pad = *pos;
185 if (pad > wpabuf_len(decrypted)) {
186 wpa_printf(MSG_DEBUG, "WPS: Invalid PKCS#5 v2.0 pad value");
| 180 return NULL;
181 }
182
183 wpa_hexdump_buf_key(MSG_MSGDUMP, "WPS: Decrypted Encrypted Settings",
184 decrypted);
185
186 pos = wpabuf_head_u8(decrypted) + wpabuf_len(decrypted) - 1;
187 pad = *pos;
188 if (pad > wpabuf_len(decrypted)) {
189 wpa_printf(MSG_DEBUG, "WPS: Invalid PKCS#5 v2.0 pad value");
|
187 wpabuf_free(decrypted);
| 190 wpabuf_clear_free(decrypted);
|
188 return NULL;
189 }
190 for (i = 0; i < pad; i++) {
191 if (*pos-- != pad) {
192 wpa_printf(MSG_DEBUG, "WPS: Invalid PKCS#5 v2.0 pad "
193 "string");
| 191 return NULL;
192 }
193 for (i = 0; i < pad; i++) {
194 if (*pos-- != pad) {
195 wpa_printf(MSG_DEBUG, "WPS: Invalid PKCS#5 v2.0 pad "
196 "string");
|
194 wpabuf_free(decrypted);
| 197 wpabuf_clear_free(decrypted);
|
195 return NULL;
196 }
197 }
198 decrypted->used -= pad;
199
200 return decrypted;
201}
202
203
204/**
205 * wps_pin_checksum - Compute PIN checksum
206 * @pin: Seven digit PIN (i.e., eight digit PIN without the checksum digit)
207 * Returns: Checksum digit
208 */
209unsigned int wps_pin_checksum(unsigned int pin)
210{
211 unsigned int accum = 0;
212 while (pin) {
213 accum += 3 * (pin % 10);
214 pin /= 10;
215 accum += pin % 10;
216 pin /= 10;
217 }
218
219 return (10 - accum % 10) % 10;
220}
221
222
223/**
224 * wps_pin_valid - Check whether a PIN has a valid checksum
225 * @pin: Eight digit PIN (i.e., including the checksum digit)
226 * Returns: 1 if checksum digit is valid, or 0 if not
227 */
228unsigned int wps_pin_valid(unsigned int pin)
229{
230 return wps_pin_checksum(pin / 10) == (pin % 10);
231}
232
233
234/**
235 * wps_generate_pin - Generate a random PIN
236 * Returns: Eight digit PIN (i.e., including the checksum digit)
237 */
| 198 return NULL;
199 }
200 }
201 decrypted->used -= pad;
202
203 return decrypted;
204}
205
206
207/**
208 * wps_pin_checksum - Compute PIN checksum
209 * @pin: Seven digit PIN (i.e., eight digit PIN without the checksum digit)
210 * Returns: Checksum digit
211 */
212unsigned int wps_pin_checksum(unsigned int pin)
213{
214 unsigned int accum = 0;
215 while (pin) {
216 accum += 3 * (pin % 10);
217 pin /= 10;
218 accum += pin % 10;
219 pin /= 10;
220 }
221
222 return (10 - accum % 10) % 10;
223}
224
225
226/**
227 * wps_pin_valid - Check whether a PIN has a valid checksum
228 * @pin: Eight digit PIN (i.e., including the checksum digit)
229 * Returns: 1 if checksum digit is valid, or 0 if not
230 */
231unsigned int wps_pin_valid(unsigned int pin)
232{
233 return wps_pin_checksum(pin / 10) == (pin % 10);
234}
235
236
237/**
238 * wps_generate_pin - Generate a random PIN
239 * Returns: Eight digit PIN (i.e., including the checksum digit)
240 */
|
238unsigned int wps_generate_pin(void)
| 241int wps_generate_pin(unsigned int *pin)
|
239{
240 unsigned int val;
241
242 /* Generate seven random digits for the PIN */
| 242{
243 unsigned int val;
244
245 /* Generate seven random digits for the PIN */
|
243 if (random_get_bytes((unsigned char *) &val, sizeof(val)) < 0) {
244 struct os_time now;
245 os_get_time(&now);
246 val = os_random() ^ now.sec ^ now.usec;
247 }
| 246 if (random_get_bytes((unsigned char *) &val, sizeof(val)) < 0)
247 return -1;
|
248 val %= 10000000;
249
250 /* Append checksum digit */
| 248 val %= 10000000;
249
250 /* Append checksum digit */
|
251 return val * 10 + wps_pin_checksum(val);
| 251 *pin = val * 10 + wps_pin_checksum(val);
252 return 0;
|
252}
253
254
255int wps_pin_str_valid(const char *pin)
256{
257 const char *p;
258 size_t len;
259
260 p = pin;
261 while (*p >= '0' && *p <= '9')
262 p++;
263 if (*p != '\0')
264 return 0;
265
266 len = p - pin;
267 return len == 4 || len == 8;
268}
269
270
271void wps_fail_event(struct wps_context *wps, enum wps_msg_type msg,
272 u16 config_error, u16 error_indication, const u8 *mac_addr)
273{
274 union wps_event_data data;
275
276 if (wps->event_cb == NULL)
277 return;
278
279 os_memset(&data, 0, sizeof(data));
280 data.fail.msg = msg;
281 data.fail.config_error = config_error;
282 data.fail.error_indication = error_indication;
283 os_memcpy(data.fail.peer_macaddr, mac_addr, ETH_ALEN);
284 wps->event_cb(wps->cb_ctx, WPS_EV_FAIL, &data);
285}
286
287
288void wps_success_event(struct wps_context *wps, const u8 *mac_addr)
289{
290 union wps_event_data data;
291
292 if (wps->event_cb == NULL)
293 return;
294
295 os_memset(&data, 0, sizeof(data));
296 os_memcpy(data.success.peer_macaddr, mac_addr, ETH_ALEN);
297 wps->event_cb(wps->cb_ctx, WPS_EV_SUCCESS, &data);
298}
299
300
301void wps_pwd_auth_fail_event(struct wps_context *wps, int enrollee, int part,
302 const u8 *mac_addr)
303{
304 union wps_event_data data;
305
306 if (wps->event_cb == NULL)
307 return;
308
309 os_memset(&data, 0, sizeof(data));
310 data.pwd_auth_fail.enrollee = enrollee;
311 data.pwd_auth_fail.part = part;
312 os_memcpy(data.pwd_auth_fail.peer_macaddr, mac_addr, ETH_ALEN);
313 wps->event_cb(wps->cb_ctx, WPS_EV_PWD_AUTH_FAIL, &data);
314}
315
316
317void wps_pbc_overlap_event(struct wps_context *wps)
318{
319 if (wps->event_cb == NULL)
320 return;
321
322 wps->event_cb(wps->cb_ctx, WPS_EV_PBC_OVERLAP, NULL);
323}
324
325
326void wps_pbc_timeout_event(struct wps_context *wps)
327{
328 if (wps->event_cb == NULL)
329 return;
330
331 wps->event_cb(wps->cb_ctx, WPS_EV_PBC_TIMEOUT, NULL);
332}
333
334
335void wps_pbc_active_event(struct wps_context *wps)
336{
337 if (wps->event_cb == NULL)
338 return;
339
340 wps->event_cb(wps->cb_ctx, WPS_EV_PBC_ACTIVE, NULL);
341}
342
343
344void wps_pbc_disable_event(struct wps_context *wps)
345{
346 if (wps->event_cb == NULL)
347 return;
348
349 wps->event_cb(wps->cb_ctx, WPS_EV_PBC_DISABLE, NULL);
350}
351
352
353#ifdef CONFIG_WPS_OOB
354
355struct wpabuf * wps_get_oob_cred(struct wps_context *wps, int rf_band,
356 int channel)
357{
358 struct wps_data data;
359 struct wpabuf *plain;
360
361 plain = wpabuf_alloc(500);
362 if (plain == NULL) {
363 wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB "
364 "credential");
365 return NULL;
366 }
367
368 os_memset(&data, 0, sizeof(data));
369 data.wps = wps;
370 data.auth_type = wps->auth_types;
371 data.encr_type = wps->encr_types;
372 if (wps_build_cred(&data, plain) ||
373 (rf_band && wps_build_rf_bands_attr(plain, rf_band)) ||
374 (channel && wps_build_ap_channel(plain, channel)) ||
375 wps_build_mac_addr(plain, wps->dev.mac_addr) ||
376 wps_build_wfa_ext(plain, 0, NULL, 0)) {
377 os_free(data.new_psk);
| 253}
254
255
256int wps_pin_str_valid(const char *pin)
257{
258 const char *p;
259 size_t len;
260
261 p = pin;
262 while (*p >= '0' && *p <= '9')
263 p++;
264 if (*p != '\0')
265 return 0;
266
267 len = p - pin;
268 return len == 4 || len == 8;
269}
270
271
272void wps_fail_event(struct wps_context *wps, enum wps_msg_type msg,
273 u16 config_error, u16 error_indication, const u8 *mac_addr)
274{
275 union wps_event_data data;
276
277 if (wps->event_cb == NULL)
278 return;
279
280 os_memset(&data, 0, sizeof(data));
281 data.fail.msg = msg;
282 data.fail.config_error = config_error;
283 data.fail.error_indication = error_indication;
284 os_memcpy(data.fail.peer_macaddr, mac_addr, ETH_ALEN);
285 wps->event_cb(wps->cb_ctx, WPS_EV_FAIL, &data);
286}
287
288
289void wps_success_event(struct wps_context *wps, const u8 *mac_addr)
290{
291 union wps_event_data data;
292
293 if (wps->event_cb == NULL)
294 return;
295
296 os_memset(&data, 0, sizeof(data));
297 os_memcpy(data.success.peer_macaddr, mac_addr, ETH_ALEN);
298 wps->event_cb(wps->cb_ctx, WPS_EV_SUCCESS, &data);
299}
300
301
302void wps_pwd_auth_fail_event(struct wps_context *wps, int enrollee, int part,
303 const u8 *mac_addr)
304{
305 union wps_event_data data;
306
307 if (wps->event_cb == NULL)
308 return;
309
310 os_memset(&data, 0, sizeof(data));
311 data.pwd_auth_fail.enrollee = enrollee;
312 data.pwd_auth_fail.part = part;
313 os_memcpy(data.pwd_auth_fail.peer_macaddr, mac_addr, ETH_ALEN);
314 wps->event_cb(wps->cb_ctx, WPS_EV_PWD_AUTH_FAIL, &data);
315}
316
317
318void wps_pbc_overlap_event(struct wps_context *wps)
319{
320 if (wps->event_cb == NULL)
321 return;
322
323 wps->event_cb(wps->cb_ctx, WPS_EV_PBC_OVERLAP, NULL);
324}
325
326
327void wps_pbc_timeout_event(struct wps_context *wps)
328{
329 if (wps->event_cb == NULL)
330 return;
331
332 wps->event_cb(wps->cb_ctx, WPS_EV_PBC_TIMEOUT, NULL);
333}
334
335
336void wps_pbc_active_event(struct wps_context *wps)
337{
338 if (wps->event_cb == NULL)
339 return;
340
341 wps->event_cb(wps->cb_ctx, WPS_EV_PBC_ACTIVE, NULL);
342}
343
344
345void wps_pbc_disable_event(struct wps_context *wps)
346{
347 if (wps->event_cb == NULL)
348 return;
349
350 wps->event_cb(wps->cb_ctx, WPS_EV_PBC_DISABLE, NULL);
351}
352
353
354#ifdef CONFIG_WPS_OOB
355
356struct wpabuf * wps_get_oob_cred(struct wps_context *wps, int rf_band,
357 int channel)
358{
359 struct wps_data data;
360 struct wpabuf *plain;
361
362 plain = wpabuf_alloc(500);
363 if (plain == NULL) {
364 wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB "
365 "credential");
366 return NULL;
367 }
368
369 os_memset(&data, 0, sizeof(data));
370 data.wps = wps;
371 data.auth_type = wps->auth_types;
372 data.encr_type = wps->encr_types;
373 if (wps_build_cred(&data, plain) ||
374 (rf_band && wps_build_rf_bands_attr(plain, rf_band)) ||
375 (channel && wps_build_ap_channel(plain, channel)) ||
376 wps_build_mac_addr(plain, wps->dev.mac_addr) ||
377 wps_build_wfa_ext(plain, 0, NULL, 0)) {
378 os_free(data.new_psk);
|
378 wpabuf_free(plain);
| 379 wpabuf_clear_free(plain);
|
379 return NULL;
380 }
381
382 if (wps->wps_state == WPS_STATE_NOT_CONFIGURED && data.new_psk &&
383 wps->ap) {
384 struct wps_credential cred;
385
386 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
387 "on credential token generation");
388
389 os_memset(&cred, 0, sizeof(cred));
390 os_memcpy(cred.ssid, wps->ssid, wps->ssid_len);
391 cred.ssid_len = wps->ssid_len;
392 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
393 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
394 os_memcpy(cred.key, data.new_psk, data.new_psk_len);
395 cred.key_len = data.new_psk_len;
396
397 wps->wps_state = WPS_STATE_CONFIGURED;
398 wpa_hexdump_ascii_key(MSG_DEBUG,
399 "WPS: Generated random passphrase",
400 data.new_psk, data.new_psk_len);
401 if (wps->cred_cb)
402 wps->cred_cb(wps->cb_ctx, &cred);
403 }
404
405 os_free(data.new_psk);
406
407 return plain;
408}
409
410
411struct wpabuf * wps_build_nfc_pw_token(u16 dev_pw_id,
412 const struct wpabuf *pubkey,
413 const struct wpabuf *dev_pw)
414{
415 struct wpabuf *data;
416
417 data = wpabuf_alloc(200);
418 if (data == NULL)
419 return NULL;
420
421 if (wps_build_oob_dev_pw(data, dev_pw_id, pubkey,
422 wpabuf_head(dev_pw), wpabuf_len(dev_pw)) ||
423 wps_build_wfa_ext(data, 0, NULL, 0)) {
424 wpa_printf(MSG_ERROR, "WPS: Failed to build NFC password "
425 "token");
| 380 return NULL;
381 }
382
383 if (wps->wps_state == WPS_STATE_NOT_CONFIGURED && data.new_psk &&
384 wps->ap) {
385 struct wps_credential cred;
386
387 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
388 "on credential token generation");
389
390 os_memset(&cred, 0, sizeof(cred));
391 os_memcpy(cred.ssid, wps->ssid, wps->ssid_len);
392 cred.ssid_len = wps->ssid_len;
393 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
394 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
395 os_memcpy(cred.key, data.new_psk, data.new_psk_len);
396 cred.key_len = data.new_psk_len;
397
398 wps->wps_state = WPS_STATE_CONFIGURED;
399 wpa_hexdump_ascii_key(MSG_DEBUG,
400 "WPS: Generated random passphrase",
401 data.new_psk, data.new_psk_len);
402 if (wps->cred_cb)
403 wps->cred_cb(wps->cb_ctx, &cred);
404 }
405
406 os_free(data.new_psk);
407
408 return plain;
409}
410
411
412struct wpabuf * wps_build_nfc_pw_token(u16 dev_pw_id,
413 const struct wpabuf *pubkey,
414 const struct wpabuf *dev_pw)
415{
416 struct wpabuf *data;
417
418 data = wpabuf_alloc(200);
419 if (data == NULL)
420 return NULL;
421
422 if (wps_build_oob_dev_pw(data, dev_pw_id, pubkey,
423 wpabuf_head(dev_pw), wpabuf_len(dev_pw)) ||
424 wps_build_wfa_ext(data, 0, NULL, 0)) {
425 wpa_printf(MSG_ERROR, "WPS: Failed to build NFC password "
426 "token");
|
426 wpabuf_free(data);
| 427 wpabuf_clear_free(data);
|
427 return NULL;
428 }
429
430 return data;
431}
432
433
434int wps_oob_use_cred(struct wps_context *wps, struct wps_parse_attr *attr)
435{
436 struct wpabuf msg;
437 size_t i;
438
439 for (i = 0; i < attr->num_cred; i++) {
440 struct wps_credential local_cred;
441 struct wps_parse_attr cattr;
442
443 os_memset(&local_cred, 0, sizeof(local_cred));
444 wpabuf_set(&msg, attr->cred[i], attr->cred_len[i]);
445 if (wps_parse_msg(&msg, &cattr) < 0 ||
446 wps_process_cred(&cattr, &local_cred)) {
447 wpa_printf(MSG_ERROR, "WPS: Failed to parse OOB "
448 "credential");
449 return -1;
450 }
451 wps->cred_cb(wps->cb_ctx, &local_cred);
452 }
453
454 return 0;
455}
456
457
458#endif /* CONFIG_WPS_OOB */
459
460
461int wps_dev_type_str2bin(const char *str, u8 dev_type[WPS_DEV_TYPE_LEN])
462{
463 const char *pos;
464
465 /* <categ>-<OUI>-<subcateg> */
466 WPA_PUT_BE16(dev_type, atoi(str));
467 pos = os_strchr(str, '-');
468 if (pos == NULL)
469 return -1;
470 pos++;
471 if (hexstr2bin(pos, &dev_type[2], 4))
472 return -1;
473 pos = os_strchr(pos, '-');
474 if (pos == NULL)
475 return -1;
476 pos++;
477 WPA_PUT_BE16(&dev_type[6], atoi(pos));
478
479
480 return 0;
481}
482
483
484char * wps_dev_type_bin2str(const u8 dev_type[WPS_DEV_TYPE_LEN], char *buf,
485 size_t buf_len)
486{
487 int ret;
488
489 ret = os_snprintf(buf, buf_len, "%u-%08X-%u",
490 WPA_GET_BE16(dev_type), WPA_GET_BE32(&dev_type[2]),
491 WPA_GET_BE16(&dev_type[6]));
492 if (os_snprintf_error(buf_len, ret))
493 return NULL;
494
495 return buf;
496}
497
498
499void uuid_gen_mac_addr(const u8 *mac_addr, u8 *uuid)
500{
501 const u8 *addr[2];
502 size_t len[2];
503 u8 hash[SHA1_MAC_LEN];
504 u8 nsid[16] = {
505 0x52, 0x64, 0x80, 0xf8,
506 0xc9, 0x9b,
507 0x4b, 0xe5,
508 0xa6, 0x55,
509 0x58, 0xed, 0x5f, 0x5d, 0x60, 0x84
510 };
511
512 addr[0] = nsid;
513 len[0] = sizeof(nsid);
514 addr[1] = mac_addr;
515 len[1] = 6;
516 sha1_vector(2, addr, len, hash);
517 os_memcpy(uuid, hash, 16);
518
519 /* Version: 5 = named-based version using SHA-1 */
520 uuid[6] = (5 << 4) | (uuid[6] & 0x0f);
521
522 /* Variant specified in RFC 4122 */
523 uuid[8] = 0x80 | (uuid[8] & 0x3f);
524}
525
526
527u16 wps_config_methods_str2bin(const char *str)
528{
529 u16 methods = 0;
530
531 if (str == NULL || str[0] == '\0') {
532 /* Default to enabling methods based on build configuration */
533 methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
534 methods |= WPS_CONFIG_VIRT_DISPLAY;
535#ifdef CONFIG_WPS_NFC
536 methods |= WPS_CONFIG_NFC_INTERFACE;
537#endif /* CONFIG_WPS_NFC */
538#ifdef CONFIG_P2P
539 methods |= WPS_CONFIG_P2PS;
540#endif /* CONFIG_P2P */
541 } else {
542 if (os_strstr(str, "ethernet"))
543 methods |= WPS_CONFIG_ETHERNET;
544 if (os_strstr(str, "label"))
545 methods |= WPS_CONFIG_LABEL;
546 if (os_strstr(str, "display"))
547 methods |= WPS_CONFIG_DISPLAY;
548 if (os_strstr(str, "ext_nfc_token"))
549 methods |= WPS_CONFIG_EXT_NFC_TOKEN;
550 if (os_strstr(str, "int_nfc_token"))
551 methods |= WPS_CONFIG_INT_NFC_TOKEN;
552 if (os_strstr(str, "nfc_interface"))
553 methods |= WPS_CONFIG_NFC_INTERFACE;
554 if (os_strstr(str, "push_button"))
555 methods |= WPS_CONFIG_PUSHBUTTON;
556 if (os_strstr(str, "keypad"))
557 methods |= WPS_CONFIG_KEYPAD;
558 if (os_strstr(str, "virtual_display"))
559 methods |= WPS_CONFIG_VIRT_DISPLAY;
560 if (os_strstr(str, "physical_display"))
561 methods |= WPS_CONFIG_PHY_DISPLAY;
562 if (os_strstr(str, "virtual_push_button"))
563 methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
564 if (os_strstr(str, "physical_push_button"))
565 methods |= WPS_CONFIG_PHY_PUSHBUTTON;
566 if (os_strstr(str, "p2ps"))
567 methods |= WPS_CONFIG_P2PS;
568 }
569
570 return methods;
571}
572
573
574struct wpabuf * wps_build_wsc_ack(struct wps_data *wps)
575{
576 struct wpabuf *msg;
577
578 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_ACK");
579
580 msg = wpabuf_alloc(1000);
581 if (msg == NULL)
582 return NULL;
583
584 if (wps_build_version(msg) ||
585 wps_build_msg_type(msg, WPS_WSC_ACK) ||
586 wps_build_enrollee_nonce(wps, msg) ||
587 wps_build_registrar_nonce(wps, msg) ||
588 wps_build_wfa_ext(msg, 0, NULL, 0)) {
589 wpabuf_free(msg);
590 return NULL;
591 }
592
593 return msg;
594}
595
596
597struct wpabuf * wps_build_wsc_nack(struct wps_data *wps)
598{
599 struct wpabuf *msg;
600
601 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_NACK");
602
603 msg = wpabuf_alloc(1000);
604 if (msg == NULL)
605 return NULL;
606
607 if (wps_build_version(msg) ||
608 wps_build_msg_type(msg, WPS_WSC_NACK) ||
609 wps_build_enrollee_nonce(wps, msg) ||
610 wps_build_registrar_nonce(wps, msg) ||
611 wps_build_config_error(msg, wps->config_error) ||
612 wps_build_wfa_ext(msg, 0, NULL, 0)) {
613 wpabuf_free(msg);
614 return NULL;
615 }
616
617 return msg;
618}
619
620
621#ifdef CONFIG_WPS_NFC
622
623struct wpabuf * wps_nfc_token_build(int ndef, int id, struct wpabuf *pubkey,
624 struct wpabuf *dev_pw)
625{
626 struct wpabuf *ret;
627
628 if (pubkey == NULL || dev_pw == NULL)
629 return NULL;
630
631 ret = wps_build_nfc_pw_token(id, pubkey, dev_pw);
632 if (ndef && ret) {
633 struct wpabuf *tmp;
634 tmp = ndef_build_wifi(ret);
635 wpabuf_free(ret);
636 if (tmp == NULL)
637 return NULL;
638 ret = tmp;
639 }
640
641 return ret;
642}
643
644
645int wps_nfc_gen_dh(struct wpabuf **pubkey, struct wpabuf **privkey)
646{
647 struct wpabuf *priv = NULL, *pub = NULL;
648 void *dh_ctx;
649
650 dh_ctx = dh5_init(&priv, &pub);
651 if (dh_ctx == NULL)
652 return -1;
653 pub = wpabuf_zeropad(pub, 192);
654 if (pub == NULL) {
655 wpabuf_free(priv);
656 return -1;
657 }
658 wpa_hexdump_buf(MSG_DEBUG, "WPS: Generated new DH pubkey", pub);
659 dh5_free(dh_ctx);
660
661 wpabuf_free(*pubkey);
662 *pubkey = pub;
| 428 return NULL;
429 }
430
431 return data;
432}
433
434
435int wps_oob_use_cred(struct wps_context *wps, struct wps_parse_attr *attr)
436{
437 struct wpabuf msg;
438 size_t i;
439
440 for (i = 0; i < attr->num_cred; i++) {
441 struct wps_credential local_cred;
442 struct wps_parse_attr cattr;
443
444 os_memset(&local_cred, 0, sizeof(local_cred));
445 wpabuf_set(&msg, attr->cred[i], attr->cred_len[i]);
446 if (wps_parse_msg(&msg, &cattr) < 0 ||
447 wps_process_cred(&cattr, &local_cred)) {
448 wpa_printf(MSG_ERROR, "WPS: Failed to parse OOB "
449 "credential");
450 return -1;
451 }
452 wps->cred_cb(wps->cb_ctx, &local_cred);
453 }
454
455 return 0;
456}
457
458
459#endif /* CONFIG_WPS_OOB */
460
461
462int wps_dev_type_str2bin(const char *str, u8 dev_type[WPS_DEV_TYPE_LEN])
463{
464 const char *pos;
465
466 /* <categ>-<OUI>-<subcateg> */
467 WPA_PUT_BE16(dev_type, atoi(str));
468 pos = os_strchr(str, '-');
469 if (pos == NULL)
470 return -1;
471 pos++;
472 if (hexstr2bin(pos, &dev_type[2], 4))
473 return -1;
474 pos = os_strchr(pos, '-');
475 if (pos == NULL)
476 return -1;
477 pos++;
478 WPA_PUT_BE16(&dev_type[6], atoi(pos));
479
480
481 return 0;
482}
483
484
485char * wps_dev_type_bin2str(const u8 dev_type[WPS_DEV_TYPE_LEN], char *buf,
486 size_t buf_len)
487{
488 int ret;
489
490 ret = os_snprintf(buf, buf_len, "%u-%08X-%u",
491 WPA_GET_BE16(dev_type), WPA_GET_BE32(&dev_type[2]),
492 WPA_GET_BE16(&dev_type[6]));
493 if (os_snprintf_error(buf_len, ret))
494 return NULL;
495
496 return buf;
497}
498
499
500void uuid_gen_mac_addr(const u8 *mac_addr, u8 *uuid)
501{
502 const u8 *addr[2];
503 size_t len[2];
504 u8 hash[SHA1_MAC_LEN];
505 u8 nsid[16] = {
506 0x52, 0x64, 0x80, 0xf8,
507 0xc9, 0x9b,
508 0x4b, 0xe5,
509 0xa6, 0x55,
510 0x58, 0xed, 0x5f, 0x5d, 0x60, 0x84
511 };
512
513 addr[0] = nsid;
514 len[0] = sizeof(nsid);
515 addr[1] = mac_addr;
516 len[1] = 6;
517 sha1_vector(2, addr, len, hash);
518 os_memcpy(uuid, hash, 16);
519
520 /* Version: 5 = named-based version using SHA-1 */
521 uuid[6] = (5 << 4) | (uuid[6] & 0x0f);
522
523 /* Variant specified in RFC 4122 */
524 uuid[8] = 0x80 | (uuid[8] & 0x3f);
525}
526
527
528u16 wps_config_methods_str2bin(const char *str)
529{
530 u16 methods = 0;
531
532 if (str == NULL || str[0] == '\0') {
533 /* Default to enabling methods based on build configuration */
534 methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
535 methods |= WPS_CONFIG_VIRT_DISPLAY;
536#ifdef CONFIG_WPS_NFC
537 methods |= WPS_CONFIG_NFC_INTERFACE;
538#endif /* CONFIG_WPS_NFC */
539#ifdef CONFIG_P2P
540 methods |= WPS_CONFIG_P2PS;
541#endif /* CONFIG_P2P */
542 } else {
543 if (os_strstr(str, "ethernet"))
544 methods |= WPS_CONFIG_ETHERNET;
545 if (os_strstr(str, "label"))
546 methods |= WPS_CONFIG_LABEL;
547 if (os_strstr(str, "display"))
548 methods |= WPS_CONFIG_DISPLAY;
549 if (os_strstr(str, "ext_nfc_token"))
550 methods |= WPS_CONFIG_EXT_NFC_TOKEN;
551 if (os_strstr(str, "int_nfc_token"))
552 methods |= WPS_CONFIG_INT_NFC_TOKEN;
553 if (os_strstr(str, "nfc_interface"))
554 methods |= WPS_CONFIG_NFC_INTERFACE;
555 if (os_strstr(str, "push_button"))
556 methods |= WPS_CONFIG_PUSHBUTTON;
557 if (os_strstr(str, "keypad"))
558 methods |= WPS_CONFIG_KEYPAD;
559 if (os_strstr(str, "virtual_display"))
560 methods |= WPS_CONFIG_VIRT_DISPLAY;
561 if (os_strstr(str, "physical_display"))
562 methods |= WPS_CONFIG_PHY_DISPLAY;
563 if (os_strstr(str, "virtual_push_button"))
564 methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
565 if (os_strstr(str, "physical_push_button"))
566 methods |= WPS_CONFIG_PHY_PUSHBUTTON;
567 if (os_strstr(str, "p2ps"))
568 methods |= WPS_CONFIG_P2PS;
569 }
570
571 return methods;
572}
573
574
575struct wpabuf * wps_build_wsc_ack(struct wps_data *wps)
576{
577 struct wpabuf *msg;
578
579 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_ACK");
580
581 msg = wpabuf_alloc(1000);
582 if (msg == NULL)
583 return NULL;
584
585 if (wps_build_version(msg) ||
586 wps_build_msg_type(msg, WPS_WSC_ACK) ||
587 wps_build_enrollee_nonce(wps, msg) ||
588 wps_build_registrar_nonce(wps, msg) ||
589 wps_build_wfa_ext(msg, 0, NULL, 0)) {
590 wpabuf_free(msg);
591 return NULL;
592 }
593
594 return msg;
595}
596
597
598struct wpabuf * wps_build_wsc_nack(struct wps_data *wps)
599{
600 struct wpabuf *msg;
601
602 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_NACK");
603
604 msg = wpabuf_alloc(1000);
605 if (msg == NULL)
606 return NULL;
607
608 if (wps_build_version(msg) ||
609 wps_build_msg_type(msg, WPS_WSC_NACK) ||
610 wps_build_enrollee_nonce(wps, msg) ||
611 wps_build_registrar_nonce(wps, msg) ||
612 wps_build_config_error(msg, wps->config_error) ||
613 wps_build_wfa_ext(msg, 0, NULL, 0)) {
614 wpabuf_free(msg);
615 return NULL;
616 }
617
618 return msg;
619}
620
621
622#ifdef CONFIG_WPS_NFC
623
624struct wpabuf * wps_nfc_token_build(int ndef, int id, struct wpabuf *pubkey,
625 struct wpabuf *dev_pw)
626{
627 struct wpabuf *ret;
628
629 if (pubkey == NULL || dev_pw == NULL)
630 return NULL;
631
632 ret = wps_build_nfc_pw_token(id, pubkey, dev_pw);
633 if (ndef && ret) {
634 struct wpabuf *tmp;
635 tmp = ndef_build_wifi(ret);
636 wpabuf_free(ret);
637 if (tmp == NULL)
638 return NULL;
639 ret = tmp;
640 }
641
642 return ret;
643}
644
645
646int wps_nfc_gen_dh(struct wpabuf **pubkey, struct wpabuf **privkey)
647{
648 struct wpabuf *priv = NULL, *pub = NULL;
649 void *dh_ctx;
650
651 dh_ctx = dh5_init(&priv, &pub);
652 if (dh_ctx == NULL)
653 return -1;
654 pub = wpabuf_zeropad(pub, 192);
655 if (pub == NULL) {
656 wpabuf_free(priv);
657 return -1;
658 }
659 wpa_hexdump_buf(MSG_DEBUG, "WPS: Generated new DH pubkey", pub);
660 dh5_free(dh_ctx);
661
662 wpabuf_free(*pubkey);
663 *pubkey = pub;
|
663 wpabuf_free(*privkey);
| 664 wpabuf_clear_free(*privkey);
|
664 *privkey = priv;
665
666 return 0;
667}
668
669
670struct wpabuf * wps_nfc_token_gen(int ndef, int *id, struct wpabuf **pubkey,
671 struct wpabuf **privkey,
672 struct wpabuf **dev_pw)
673{
674 struct wpabuf *pw;
675 u16 val;
676
677 pw = wpabuf_alloc(WPS_OOB_DEVICE_PASSWORD_LEN);
678 if (pw == NULL)
679 return NULL;
680
681 if (random_get_bytes(wpabuf_put(pw, WPS_OOB_DEVICE_PASSWORD_LEN),
682 WPS_OOB_DEVICE_PASSWORD_LEN) ||
683 random_get_bytes((u8 *) &val, sizeof(val))) {
684 wpabuf_free(pw);
685 return NULL;
686 }
687
688 if (wps_nfc_gen_dh(pubkey, privkey) < 0) {
689 wpabuf_free(pw);
690 return NULL;
691 }
692
693 *id = 0x10 + val % 0xfff0;
| 665 *privkey = priv;
666
667 return 0;
668}
669
670
671struct wpabuf * wps_nfc_token_gen(int ndef, int *id, struct wpabuf **pubkey,
672 struct wpabuf **privkey,
673 struct wpabuf **dev_pw)
674{
675 struct wpabuf *pw;
676 u16 val;
677
678 pw = wpabuf_alloc(WPS_OOB_DEVICE_PASSWORD_LEN);
679 if (pw == NULL)
680 return NULL;
681
682 if (random_get_bytes(wpabuf_put(pw, WPS_OOB_DEVICE_PASSWORD_LEN),
683 WPS_OOB_DEVICE_PASSWORD_LEN) ||
684 random_get_bytes((u8 *) &val, sizeof(val))) {
685 wpabuf_free(pw);
686 return NULL;
687 }
688
689 if (wps_nfc_gen_dh(pubkey, privkey) < 0) {
690 wpabuf_free(pw);
691 return NULL;
692 }
693
694 *id = 0x10 + val % 0xfff0;
|
694 wpabuf_free(*dev_pw);
| 695 wpabuf_clear_free(*dev_pw);
|
695 *dev_pw = pw;
696
697 return wps_nfc_token_build(ndef, *id, *pubkey, *dev_pw);
698}
699
700
701struct wpabuf * wps_build_nfc_handover_req(struct wps_context *ctx,
702 struct wpabuf *nfc_dh_pubkey)
703{
704 struct wpabuf *msg;
705 void *len;
706
707 if (ctx == NULL)
708 return NULL;
709
710 wpa_printf(MSG_DEBUG, "WPS: Building attributes for NFC connection "
711 "handover request");
712
713 if (nfc_dh_pubkey == NULL) {
714 wpa_printf(MSG_DEBUG, "WPS: No NFC OOB Device Password "
715 "configured");
716 return NULL;
717 }
718
719 msg = wpabuf_alloc(1000);
720 if (msg == NULL)
721 return msg;
722 len = wpabuf_put(msg, 2);
723
724 if (wps_build_oob_dev_pw(msg, DEV_PW_NFC_CONNECTION_HANDOVER,
725 nfc_dh_pubkey, NULL, 0) ||
726 wps_build_uuid_e(msg, ctx->uuid) ||
727 wps_build_wfa_ext(msg, 0, NULL, 0)) {
728 wpabuf_free(msg);
729 return NULL;
730 }
731
732 WPA_PUT_BE16(len, wpabuf_len(msg) - 2);
733
734 return msg;
735}
736
737
738static int wps_build_ssid(struct wpabuf *msg, struct wps_context *wps)
739{
740 wpa_printf(MSG_DEBUG, "WPS: * SSID");
741 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID in Connection Handover Select",
742 wps->ssid, wps->ssid_len);
743 wpabuf_put_be16(msg, ATTR_SSID);
744 wpabuf_put_be16(msg, wps->ssid_len);
745 wpabuf_put_data(msg, wps->ssid, wps->ssid_len);
746 return 0;
747}
748
749
750static int wps_build_ap_freq(struct wpabuf *msg, int freq)
751{
752 enum hostapd_hw_mode mode;
753 u8 channel, rf_band;
754 u16 ap_channel;
755
756 if (freq <= 0)
757 return 0;
758
759 mode = ieee80211_freq_to_chan(freq, &channel);
760 if (mode == NUM_HOSTAPD_MODES)
761 return 0; /* Unknown channel */
762
763 if (mode == HOSTAPD_MODE_IEEE80211G || mode == HOSTAPD_MODE_IEEE80211B)
764 rf_band = WPS_RF_24GHZ;
765 else if (mode == HOSTAPD_MODE_IEEE80211A)
766 rf_band = WPS_RF_50GHZ;
767 else if (mode == HOSTAPD_MODE_IEEE80211AD)
768 rf_band = WPS_RF_60GHZ;
769 else
770 return 0; /* Unknown band */
771 ap_channel = channel;
772
773 if (wps_build_rf_bands_attr(msg, rf_band) ||
774 wps_build_ap_channel(msg, ap_channel))
775 return -1;
776
777 return 0;
778}
779
780
781struct wpabuf * wps_build_nfc_handover_sel(struct wps_context *ctx,
782 struct wpabuf *nfc_dh_pubkey,
783 const u8 *bssid, int freq)
784{
785 struct wpabuf *msg;
786 void *len;
787
788 if (ctx == NULL)
789 return NULL;
790
791 wpa_printf(MSG_DEBUG, "WPS: Building attributes for NFC connection "
792 "handover select");
793
794 if (nfc_dh_pubkey == NULL) {
795 wpa_printf(MSG_DEBUG, "WPS: No NFC OOB Device Password "
796 "configured");
797 return NULL;
798 }
799
800 msg = wpabuf_alloc(1000);
801 if (msg == NULL)
802 return msg;
803 len = wpabuf_put(msg, 2);
804
805 if (wps_build_oob_dev_pw(msg, DEV_PW_NFC_CONNECTION_HANDOVER,
806 nfc_dh_pubkey, NULL, 0) ||
807 wps_build_ssid(msg, ctx) ||
808 wps_build_ap_freq(msg, freq) ||
809 (bssid && wps_build_mac_addr(msg, bssid)) ||
810 wps_build_wfa_ext(msg, 0, NULL, 0)) {
811 wpabuf_free(msg);
812 return NULL;
813 }
814
815 WPA_PUT_BE16(len, wpabuf_len(msg) - 2);
816
817 return msg;
818}
819
820
821struct wpabuf * wps_build_nfc_handover_req_p2p(struct wps_context *ctx,
822 struct wpabuf *nfc_dh_pubkey)
823{
824 struct wpabuf *msg;
825
826 if (ctx == NULL)
827 return NULL;
828
829 wpa_printf(MSG_DEBUG, "WPS: Building attributes for NFC connection "
830 "handover request (P2P)");
831
832 if (nfc_dh_pubkey == NULL) {
833 wpa_printf(MSG_DEBUG, "WPS: No NFC DH Public Key configured");
834 return NULL;
835 }
836
837 msg = wpabuf_alloc(1000);
838 if (msg == NULL)
839 return msg;
840
841 if (wps_build_manufacturer(&ctx->dev, msg) ||
842 wps_build_model_name(&ctx->dev, msg) ||
843 wps_build_model_number(&ctx->dev, msg) ||
844 wps_build_oob_dev_pw(msg, DEV_PW_NFC_CONNECTION_HANDOVER,
845 nfc_dh_pubkey, NULL, 0) ||
846 wps_build_rf_bands(&ctx->dev, msg, 0) ||
847 wps_build_serial_number(&ctx->dev, msg) ||
848 wps_build_uuid_e(msg, ctx->uuid) ||
849 wps_build_wfa_ext(msg, 0, NULL, 0)) {
850 wpabuf_free(msg);
851 return NULL;
852 }
853
854 return msg;
855}
856
857
858struct wpabuf * wps_build_nfc_handover_sel_p2p(struct wps_context *ctx,
859 int nfc_dev_pw_id,
860 struct wpabuf *nfc_dh_pubkey,
861 struct wpabuf *nfc_dev_pw)
862{
863 struct wpabuf *msg;
864 const u8 *dev_pw;
865 size_t dev_pw_len;
866
867 if (ctx == NULL)
868 return NULL;
869
870 wpa_printf(MSG_DEBUG, "WPS: Building attributes for NFC connection "
871 "handover select (P2P)");
872
873 if (nfc_dh_pubkey == NULL ||
874 (nfc_dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER &&
875 nfc_dev_pw == NULL)) {
876 wpa_printf(MSG_DEBUG, "WPS: No NFC OOB Device Password "
877 "configured");
878 return NULL;
879 }
880
881 msg = wpabuf_alloc(1000);
882 if (msg == NULL)
883 return msg;
884
885 if (nfc_dev_pw) {
886 dev_pw = wpabuf_head(nfc_dev_pw);
887 dev_pw_len = wpabuf_len(nfc_dev_pw);
888 } else {
889 dev_pw = NULL;
890 dev_pw_len = 0;
891 }
892
893 if (wps_build_manufacturer(&ctx->dev, msg) ||
894 wps_build_model_name(&ctx->dev, msg) ||
895 wps_build_model_number(&ctx->dev, msg) ||
896 wps_build_oob_dev_pw(msg, nfc_dev_pw_id, nfc_dh_pubkey,
897 dev_pw, dev_pw_len) ||
898 wps_build_rf_bands(&ctx->dev, msg, 0) ||
899 wps_build_serial_number(&ctx->dev, msg) ||
900 wps_build_uuid_e(msg, ctx->uuid) ||
901 wps_build_wfa_ext(msg, 0, NULL, 0)) {
902 wpabuf_free(msg);
903 return NULL;
904 }
905
906 return msg;
907}
908
909#endif /* CONFIG_WPS_NFC */
| 696 *dev_pw = pw;
697
698 return wps_nfc_token_build(ndef, *id, *pubkey, *dev_pw);
699}
700
701
702struct wpabuf * wps_build_nfc_handover_req(struct wps_context *ctx,
703 struct wpabuf *nfc_dh_pubkey)
704{
705 struct wpabuf *msg;
706 void *len;
707
708 if (ctx == NULL)
709 return NULL;
710
711 wpa_printf(MSG_DEBUG, "WPS: Building attributes for NFC connection "
712 "handover request");
713
714 if (nfc_dh_pubkey == NULL) {
715 wpa_printf(MSG_DEBUG, "WPS: No NFC OOB Device Password "
716 "configured");
717 return NULL;
718 }
719
720 msg = wpabuf_alloc(1000);
721 if (msg == NULL)
722 return msg;
723 len = wpabuf_put(msg, 2);
724
725 if (wps_build_oob_dev_pw(msg, DEV_PW_NFC_CONNECTION_HANDOVER,
726 nfc_dh_pubkey, NULL, 0) ||
727 wps_build_uuid_e(msg, ctx->uuid) ||
728 wps_build_wfa_ext(msg, 0, NULL, 0)) {
729 wpabuf_free(msg);
730 return NULL;
731 }
732
733 WPA_PUT_BE16(len, wpabuf_len(msg) - 2);
734
735 return msg;
736}
737
738
739static int wps_build_ssid(struct wpabuf *msg, struct wps_context *wps)
740{
741 wpa_printf(MSG_DEBUG, "WPS: * SSID");
742 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID in Connection Handover Select",
743 wps->ssid, wps->ssid_len);
744 wpabuf_put_be16(msg, ATTR_SSID);
745 wpabuf_put_be16(msg, wps->ssid_len);
746 wpabuf_put_data(msg, wps->ssid, wps->ssid_len);
747 return 0;
748}
749
750
751static int wps_build_ap_freq(struct wpabuf *msg, int freq)
752{
753 enum hostapd_hw_mode mode;
754 u8 channel, rf_band;
755 u16 ap_channel;
756
757 if (freq <= 0)
758 return 0;
759
760 mode = ieee80211_freq_to_chan(freq, &channel);
761 if (mode == NUM_HOSTAPD_MODES)
762 return 0; /* Unknown channel */
763
764 if (mode == HOSTAPD_MODE_IEEE80211G || mode == HOSTAPD_MODE_IEEE80211B)
765 rf_band = WPS_RF_24GHZ;
766 else if (mode == HOSTAPD_MODE_IEEE80211A)
767 rf_band = WPS_RF_50GHZ;
768 else if (mode == HOSTAPD_MODE_IEEE80211AD)
769 rf_band = WPS_RF_60GHZ;
770 else
771 return 0; /* Unknown band */
772 ap_channel = channel;
773
774 if (wps_build_rf_bands_attr(msg, rf_band) ||
775 wps_build_ap_channel(msg, ap_channel))
776 return -1;
777
778 return 0;
779}
780
781
782struct wpabuf * wps_build_nfc_handover_sel(struct wps_context *ctx,
783 struct wpabuf *nfc_dh_pubkey,
784 const u8 *bssid, int freq)
785{
786 struct wpabuf *msg;
787 void *len;
788
789 if (ctx == NULL)
790 return NULL;
791
792 wpa_printf(MSG_DEBUG, "WPS: Building attributes for NFC connection "
793 "handover select");
794
795 if (nfc_dh_pubkey == NULL) {
796 wpa_printf(MSG_DEBUG, "WPS: No NFC OOB Device Password "
797 "configured");
798 return NULL;
799 }
800
801 msg = wpabuf_alloc(1000);
802 if (msg == NULL)
803 return msg;
804 len = wpabuf_put(msg, 2);
805
806 if (wps_build_oob_dev_pw(msg, DEV_PW_NFC_CONNECTION_HANDOVER,
807 nfc_dh_pubkey, NULL, 0) ||
808 wps_build_ssid(msg, ctx) ||
809 wps_build_ap_freq(msg, freq) ||
810 (bssid && wps_build_mac_addr(msg, bssid)) ||
811 wps_build_wfa_ext(msg, 0, NULL, 0)) {
812 wpabuf_free(msg);
813 return NULL;
814 }
815
816 WPA_PUT_BE16(len, wpabuf_len(msg) - 2);
817
818 return msg;
819}
820
821
822struct wpabuf * wps_build_nfc_handover_req_p2p(struct wps_context *ctx,
823 struct wpabuf *nfc_dh_pubkey)
824{
825 struct wpabuf *msg;
826
827 if (ctx == NULL)
828 return NULL;
829
830 wpa_printf(MSG_DEBUG, "WPS: Building attributes for NFC connection "
831 "handover request (P2P)");
832
833 if (nfc_dh_pubkey == NULL) {
834 wpa_printf(MSG_DEBUG, "WPS: No NFC DH Public Key configured");
835 return NULL;
836 }
837
838 msg = wpabuf_alloc(1000);
839 if (msg == NULL)
840 return msg;
841
842 if (wps_build_manufacturer(&ctx->dev, msg) ||
843 wps_build_model_name(&ctx->dev, msg) ||
844 wps_build_model_number(&ctx->dev, msg) ||
845 wps_build_oob_dev_pw(msg, DEV_PW_NFC_CONNECTION_HANDOVER,
846 nfc_dh_pubkey, NULL, 0) ||
847 wps_build_rf_bands(&ctx->dev, msg, 0) ||
848 wps_build_serial_number(&ctx->dev, msg) ||
849 wps_build_uuid_e(msg, ctx->uuid) ||
850 wps_build_wfa_ext(msg, 0, NULL, 0)) {
851 wpabuf_free(msg);
852 return NULL;
853 }
854
855 return msg;
856}
857
858
859struct wpabuf * wps_build_nfc_handover_sel_p2p(struct wps_context *ctx,
860 int nfc_dev_pw_id,
861 struct wpabuf *nfc_dh_pubkey,
862 struct wpabuf *nfc_dev_pw)
863{
864 struct wpabuf *msg;
865 const u8 *dev_pw;
866 size_t dev_pw_len;
867
868 if (ctx == NULL)
869 return NULL;
870
871 wpa_printf(MSG_DEBUG, "WPS: Building attributes for NFC connection "
872 "handover select (P2P)");
873
874 if (nfc_dh_pubkey == NULL ||
875 (nfc_dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER &&
876 nfc_dev_pw == NULL)) {
877 wpa_printf(MSG_DEBUG, "WPS: No NFC OOB Device Password "
878 "configured");
879 return NULL;
880 }
881
882 msg = wpabuf_alloc(1000);
883 if (msg == NULL)
884 return msg;
885
886 if (nfc_dev_pw) {
887 dev_pw = wpabuf_head(nfc_dev_pw);
888 dev_pw_len = wpabuf_len(nfc_dev_pw);
889 } else {
890 dev_pw = NULL;
891 dev_pw_len = 0;
892 }
893
894 if (wps_build_manufacturer(&ctx->dev, msg) ||
895 wps_build_model_name(&ctx->dev, msg) ||
896 wps_build_model_number(&ctx->dev, msg) ||
897 wps_build_oob_dev_pw(msg, nfc_dev_pw_id, nfc_dh_pubkey,
898 dev_pw, dev_pw_len) ||
899 wps_build_rf_bands(&ctx->dev, msg, 0) ||
900 wps_build_serial_number(&ctx->dev, msg) ||
901 wps_build_uuid_e(msg, ctx->uuid) ||
902 wps_build_wfa_ext(msg, 0, NULL, 0)) {
903 wpabuf_free(msg);
904 return NULL;
905 }
906
907 return msg;
908}
909
910#endif /* CONFIG_WPS_NFC */
|