2 * WPA/RSN - Shared functions for supplicant and authenticator
3 * Copyright (c) 2002-2013, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
12 #include "crypto/md5.h"
13 #include "crypto/sha1.h"
14 #include "crypto/sha256.h"
15 #include "crypto/aes_wrap.h"
16 #include "crypto/crypto.h"
17 #include "ieee802_11_defs.h"
19 #include "wpa_common.h"
23 * wpa_eapol_key_mic - Calculate EAPOL-Key MIC
24 * @key: EAPOL-Key Key Confirmation Key (KCK)
25 * @ver: Key descriptor version (WPA_KEY_INFO_TYPE_*)
26 * @buf: Pointer to the beginning of the EAPOL header (version field)
27 * @len: Length of the EAPOL frame (from EAPOL header to the end of the frame)
28 * @mic: Pointer to the buffer to which the EAPOL-Key MIC is written
29 * Returns: 0 on success, -1 on failure
31 * Calculate EAPOL-Key MIC for an EAPOL-Key packet. The EAPOL-Key MIC field has
32 * to be cleared (all zeroes) when calling this function.
34 * Note: 'IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames' has an error in the
35 * description of the Key MIC calculation. It includes packet data from the
36 * beginning of the EAPOL-Key header, not EAPOL header. This incorrect change
37 * happened during final editing of the standard and the correct behavior is
38 * defined in the last draft (IEEE 802.11i/D10).
40 int wpa_eapol_key_mic(const u8 *key, int ver, const u8 *buf, size_t len,
43 u8 hash[SHA1_MAC_LEN];
47 case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4:
48 return hmac_md5(key, 16, buf, len, mic);
49 #endif /* CONFIG_FIPS */
50 case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES:
51 if (hmac_sha1(key, 16, buf, len, hash))
53 os_memcpy(mic, hash, MD5_MAC_LEN);
55 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
56 case WPA_KEY_INFO_TYPE_AES_128_CMAC:
57 return omac1_aes_128(key, buf, len, mic);
58 #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
60 case WPA_KEY_INFO_TYPE_AKM_DEFINED:
61 /* FIX: This should be based on negotiated AKM */
62 return omac1_aes_128(key, buf, len, mic);
63 #endif /* CONFIG_HS20 */
73 * wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces
74 * @pmk: Pairwise master key
75 * @pmk_len: Length of PMK
76 * @label: Label to use in derivation
79 * @nonce1: ANonce or SNonce
80 * @nonce2: SNonce or ANonce
81 * @ptk: Buffer for pairwise transient key
82 * @ptk_len: Length of PTK
83 * @use_sha256: Whether to use SHA256-based KDF
85 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
86 * PTK = PRF-X(PMK, "Pairwise key expansion",
87 * Min(AA, SA) || Max(AA, SA) ||
88 * Min(ANonce, SNonce) || Max(ANonce, SNonce))
90 * STK = PRF-X(SMK, "Peer key expansion",
91 * Min(MAC_I, MAC_P) || Max(MAC_I, MAC_P) ||
92 * Min(INonce, PNonce) || Max(INonce, PNonce))
94 void wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
95 const u8 *addr1, const u8 *addr2,
96 const u8 *nonce1, const u8 *nonce2,
97 u8 *ptk, size_t ptk_len, int use_sha256)
99 u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN];
101 if (os_memcmp(addr1, addr2, ETH_ALEN) < 0) {
102 os_memcpy(data, addr1, ETH_ALEN);
103 os_memcpy(data + ETH_ALEN, addr2, ETH_ALEN);
105 os_memcpy(data, addr2, ETH_ALEN);
106 os_memcpy(data + ETH_ALEN, addr1, ETH_ALEN);
109 if (os_memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) {
110 os_memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN);
111 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2,
114 os_memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN);
115 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1,
119 #ifdef CONFIG_IEEE80211W
121 sha256_prf(pmk, pmk_len, label, data, sizeof(data),
124 #endif /* CONFIG_IEEE80211W */
125 sha1_prf(pmk, pmk_len, label, data, sizeof(data), ptk,
128 wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR,
129 MAC2STR(addr1), MAC2STR(addr2));
130 wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN);
131 wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN);
132 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len);
133 wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", ptk, ptk_len);
137 #ifdef CONFIG_IEEE80211R
138 int wpa_ft_mic(const u8 *kck, const u8 *sta_addr, const u8 *ap_addr,
139 u8 transaction_seqnum, const u8 *mdie, size_t mdie_len,
140 const u8 *ftie, size_t ftie_len,
141 const u8 *rsnie, size_t rsnie_len,
142 const u8 *ric, size_t ric_len, u8 *mic)
147 buf_len = 2 * ETH_ALEN + 1 + mdie_len + ftie_len + rsnie_len + ric_len;
148 buf = os_malloc(buf_len);
153 os_memcpy(pos, sta_addr, ETH_ALEN);
155 os_memcpy(pos, ap_addr, ETH_ALEN);
157 *pos++ = transaction_seqnum;
159 os_memcpy(pos, rsnie, rsnie_len);
163 os_memcpy(pos, mdie, mdie_len);
167 struct rsn_ftie *_ftie;
168 os_memcpy(pos, ftie, ftie_len);
169 if (ftie_len < 2 + sizeof(*_ftie)) {
173 _ftie = (struct rsn_ftie *) (pos + 2);
174 os_memset(_ftie->mic, 0, sizeof(_ftie->mic));
178 os_memcpy(pos, ric, ric_len);
182 wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", buf, pos - buf);
183 if (omac1_aes_128(kck, buf, pos - buf, mic)) {
194 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
195 struct wpa_ft_ies *parse)
200 parse->ftie_len = ie_len;
202 pos = ie + sizeof(struct rsn_ftie);
205 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
207 case FTIE_SUBELEM_R1KH_ID:
208 if (pos[1] != FT_R1KH_ID_LEN) {
209 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
210 "length in FTIE: %d", pos[1]);
213 parse->r1kh_id = pos + 2;
215 case FTIE_SUBELEM_GTK:
216 parse->gtk = pos + 2;
217 parse->gtk_len = pos[1];
219 case FTIE_SUBELEM_R0KH_ID:
220 if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
221 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
222 "length in FTIE: %d", pos[1]);
225 parse->r0kh_id = pos + 2;
226 parse->r0kh_id_len = pos[1];
228 #ifdef CONFIG_IEEE80211W
229 case FTIE_SUBELEM_IGTK:
230 parse->igtk = pos + 2;
231 parse->igtk_len = pos[1];
233 #endif /* CONFIG_IEEE80211W */
243 int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
244 struct wpa_ft_ies *parse)
247 struct wpa_ie_data data;
249 const struct rsn_ftie *ftie;
250 int prot_ie_count = 0;
252 os_memset(parse, 0, sizeof(*parse));
258 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
261 parse->rsn = pos + 2;
262 parse->rsn_len = pos[1];
263 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
267 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
271 if (data.num_pmkid == 1 && data.pmkid)
272 parse->rsn_pmkid = data.pmkid;
274 case WLAN_EID_MOBILITY_DOMAIN:
275 parse->mdie = pos + 2;
276 parse->mdie_len = pos[1];
278 case WLAN_EID_FAST_BSS_TRANSITION:
279 if (pos[1] < sizeof(*ftie))
281 ftie = (const struct rsn_ftie *) (pos + 2);
282 prot_ie_count = ftie->mic_control[1];
283 if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
286 case WLAN_EID_TIMEOUT_INTERVAL:
287 parse->tie = pos + 2;
288 parse->tie_len = pos[1];
290 case WLAN_EID_RIC_DATA:
291 if (parse->ric == NULL)
299 if (prot_ie_count == 0)
300 return 0; /* no MIC */
303 * Check that the protected IE count matches with IEs included in the
312 if (prot_ie_count < 0) {
313 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
314 "the protected IE count");
318 if (prot_ie_count == 0 && parse->ric) {
319 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
320 "included in protected IE count");
324 /* Determine the end of the RIC IE(s) */
326 while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
331 parse->ric_len = pos - parse->ric;
333 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
334 "frame", (int) prot_ie_count);
340 #endif /* CONFIG_IEEE80211R */
343 static int rsn_selector_to_bitfield(const u8 *s)
345 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE)
346 return WPA_CIPHER_NONE;
347 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_WEP40)
348 return WPA_CIPHER_WEP40;
349 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP)
350 return WPA_CIPHER_TKIP;
351 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP)
352 return WPA_CIPHER_CCMP;
353 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_WEP104)
354 return WPA_CIPHER_WEP104;
355 #ifdef CONFIG_IEEE80211W
356 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC)
357 return WPA_CIPHER_AES_128_CMAC;
358 #endif /* CONFIG_IEEE80211W */
359 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP)
360 return WPA_CIPHER_GCMP;
361 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP_256)
362 return WPA_CIPHER_CCMP_256;
363 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP_256)
364 return WPA_CIPHER_GCMP_256;
365 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_128)
366 return WPA_CIPHER_BIP_GMAC_128;
367 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_256)
368 return WPA_CIPHER_BIP_GMAC_256;
369 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_CMAC_256)
370 return WPA_CIPHER_BIP_CMAC_256;
371 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED)
372 return WPA_CIPHER_GTK_NOT_USED;
377 static int rsn_key_mgmt_to_bitfield(const u8 *s)
379 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X)
380 return WPA_KEY_MGMT_IEEE8021X;
381 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X)
382 return WPA_KEY_MGMT_PSK;
383 #ifdef CONFIG_IEEE80211R
384 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X)
385 return WPA_KEY_MGMT_FT_IEEE8021X;
386 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK)
387 return WPA_KEY_MGMT_FT_PSK;
388 #endif /* CONFIG_IEEE80211R */
389 #ifdef CONFIG_IEEE80211W
390 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256)
391 return WPA_KEY_MGMT_IEEE8021X_SHA256;
392 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256)
393 return WPA_KEY_MGMT_PSK_SHA256;
394 #endif /* CONFIG_IEEE80211W */
396 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE)
397 return WPA_KEY_MGMT_SAE;
398 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE)
399 return WPA_KEY_MGMT_FT_SAE;
400 #endif /* CONFIG_SAE */
401 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B)
402 return WPA_KEY_MGMT_IEEE8021X_SUITE_B;
407 static int wpa_cipher_valid_group(int cipher)
409 return wpa_cipher_valid_pairwise(cipher) ||
410 cipher == WPA_CIPHER_WEP104 ||
411 cipher == WPA_CIPHER_WEP40 ||
412 cipher == WPA_CIPHER_GTK_NOT_USED;
416 #ifdef CONFIG_IEEE80211W
417 int wpa_cipher_valid_mgmt_group(int cipher)
419 return cipher == WPA_CIPHER_AES_128_CMAC ||
420 cipher == WPA_CIPHER_BIP_GMAC_128 ||
421 cipher == WPA_CIPHER_BIP_GMAC_256 ||
422 cipher == WPA_CIPHER_BIP_CMAC_256;
424 #endif /* CONFIG_IEEE80211W */
428 * wpa_parse_wpa_ie_rsn - Parse RSN IE
429 * @rsn_ie: Buffer containing RSN IE
430 * @rsn_ie_len: RSN IE buffer length (including IE number and length octets)
431 * @data: Pointer to structure that will be filled in with parsed data
432 * Returns: 0 on success, <0 on failure
434 int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
435 struct wpa_ie_data *data)
437 const struct rsn_ie_hdr *hdr;
442 os_memset(data, 0, sizeof(*data));
443 data->proto = WPA_PROTO_RSN;
444 data->pairwise_cipher = WPA_CIPHER_CCMP;
445 data->group_cipher = WPA_CIPHER_CCMP;
446 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
447 data->capabilities = 0;
450 #ifdef CONFIG_IEEE80211W
451 data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
452 #else /* CONFIG_IEEE80211W */
453 data->mgmt_group_cipher = 0;
454 #endif /* CONFIG_IEEE80211W */
456 if (rsn_ie_len == 0) {
457 /* No RSN IE - fail silently */
461 if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) {
462 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
463 __func__, (unsigned long) rsn_ie_len);
467 hdr = (const struct rsn_ie_hdr *) rsn_ie;
469 if (hdr->elem_id != WLAN_EID_RSN ||
470 hdr->len != rsn_ie_len - 2 ||
471 WPA_GET_LE16(hdr->version) != RSN_VERSION) {
472 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
477 pos = (const u8 *) (hdr + 1);
478 left = rsn_ie_len - sizeof(*hdr);
480 if (left >= RSN_SELECTOR_LEN) {
481 data->group_cipher = rsn_selector_to_bitfield(pos);
482 if (!wpa_cipher_valid_group(data->group_cipher)) {
483 wpa_printf(MSG_DEBUG, "%s: invalid group cipher 0x%x",
484 __func__, data->group_cipher);
487 pos += RSN_SELECTOR_LEN;
488 left -= RSN_SELECTOR_LEN;
489 } else if (left > 0) {
490 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
496 data->pairwise_cipher = 0;
497 count = WPA_GET_LE16(pos);
500 if (count == 0 || left < count * RSN_SELECTOR_LEN) {
501 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
502 "count %u left %u", __func__, count, left);
505 for (i = 0; i < count; i++) {
506 data->pairwise_cipher |= rsn_selector_to_bitfield(pos);
507 pos += RSN_SELECTOR_LEN;
508 left -= RSN_SELECTOR_LEN;
510 #ifdef CONFIG_IEEE80211W
511 if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) {
512 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as "
513 "pairwise cipher", __func__);
516 #endif /* CONFIG_IEEE80211W */
517 } else if (left == 1) {
518 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
525 count = WPA_GET_LE16(pos);
528 if (count == 0 || left < count * RSN_SELECTOR_LEN) {
529 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
530 "count %u left %u", __func__, count, left);
533 for (i = 0; i < count; i++) {
534 data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos);
535 pos += RSN_SELECTOR_LEN;
536 left -= RSN_SELECTOR_LEN;
538 } else if (left == 1) {
539 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
545 data->capabilities = WPA_GET_LE16(pos);
551 data->num_pmkid = WPA_GET_LE16(pos);
554 if (left < (int) data->num_pmkid * PMKID_LEN) {
555 wpa_printf(MSG_DEBUG, "%s: PMKID underflow "
556 "(num_pmkid=%lu left=%d)",
557 __func__, (unsigned long) data->num_pmkid,
563 pos += data->num_pmkid * PMKID_LEN;
564 left -= data->num_pmkid * PMKID_LEN;
568 #ifdef CONFIG_IEEE80211W
570 data->mgmt_group_cipher = rsn_selector_to_bitfield(pos);
571 if (!wpa_cipher_valid_mgmt_group(data->mgmt_group_cipher)) {
572 wpa_printf(MSG_DEBUG, "%s: Unsupported management "
573 "group cipher 0x%x", __func__,
574 data->mgmt_group_cipher);
577 pos += RSN_SELECTOR_LEN;
578 left -= RSN_SELECTOR_LEN;
580 #endif /* CONFIG_IEEE80211W */
583 wpa_hexdump(MSG_DEBUG,
584 "wpa_parse_wpa_ie_rsn: ignore trailing bytes",
592 static int wpa_selector_to_bitfield(const u8 *s)
594 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
595 return WPA_CIPHER_NONE;
596 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP40)
597 return WPA_CIPHER_WEP40;
598 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
599 return WPA_CIPHER_TKIP;
600 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
601 return WPA_CIPHER_CCMP;
602 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP104)
603 return WPA_CIPHER_WEP104;
608 static int wpa_key_mgmt_to_bitfield(const u8 *s)
610 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
611 return WPA_KEY_MGMT_IEEE8021X;
612 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
613 return WPA_KEY_MGMT_PSK;
614 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
615 return WPA_KEY_MGMT_WPA_NONE;
620 int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
621 struct wpa_ie_data *data)
623 const struct wpa_ie_hdr *hdr;
628 os_memset(data, 0, sizeof(*data));
629 data->proto = WPA_PROTO_WPA;
630 data->pairwise_cipher = WPA_CIPHER_TKIP;
631 data->group_cipher = WPA_CIPHER_TKIP;
632 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
633 data->capabilities = 0;
636 data->mgmt_group_cipher = 0;
638 if (wpa_ie_len == 0) {
639 /* No WPA IE - fail silently */
643 if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
644 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
645 __func__, (unsigned long) wpa_ie_len);
649 hdr = (const struct wpa_ie_hdr *) wpa_ie;
651 if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
652 hdr->len != wpa_ie_len - 2 ||
653 RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
654 WPA_GET_LE16(hdr->version) != WPA_VERSION) {
655 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
660 pos = (const u8 *) (hdr + 1);
661 left = wpa_ie_len - sizeof(*hdr);
663 if (left >= WPA_SELECTOR_LEN) {
664 data->group_cipher = wpa_selector_to_bitfield(pos);
665 pos += WPA_SELECTOR_LEN;
666 left -= WPA_SELECTOR_LEN;
667 } else if (left > 0) {
668 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
674 data->pairwise_cipher = 0;
675 count = WPA_GET_LE16(pos);
678 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
679 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
680 "count %u left %u", __func__, count, left);
683 for (i = 0; i < count; i++) {
684 data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
685 pos += WPA_SELECTOR_LEN;
686 left -= WPA_SELECTOR_LEN;
688 } else if (left == 1) {
689 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
696 count = WPA_GET_LE16(pos);
699 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
700 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
701 "count %u left %u", __func__, count, left);
704 for (i = 0; i < count; i++) {
705 data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
706 pos += WPA_SELECTOR_LEN;
707 left -= WPA_SELECTOR_LEN;
709 } else if (left == 1) {
710 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
716 data->capabilities = WPA_GET_LE16(pos);
722 wpa_hexdump(MSG_DEBUG,
723 "wpa_parse_wpa_ie_wpa: ignore trailing bytes",
731 #ifdef CONFIG_IEEE80211R
734 * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name
736 * IEEE Std 802.11r-2008 - 8.5.1.5.3
738 void wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len,
739 const u8 *ssid, size_t ssid_len,
740 const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len,
741 const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name)
743 u8 buf[1 + WPA_MAX_SSID_LEN + MOBILITY_DOMAIN_ID_LEN + 1 +
744 FT_R0KH_ID_MAX_LEN + ETH_ALEN];
745 u8 *pos, r0_key_data[48], hash[32];
750 * R0-Key-Data = KDF-384(XXKey, "FT-R0",
751 * SSIDlength || SSID || MDID || R0KHlength ||
752 * R0KH-ID || S0KH-ID)
753 * XXKey is either the second 256 bits of MSK or PSK.
754 * PMK-R0 = L(R0-Key-Data, 0, 256)
755 * PMK-R0Name-Salt = L(R0-Key-Data, 256, 128)
757 if (ssid_len > WPA_MAX_SSID_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN)
761 os_memcpy(pos, ssid, ssid_len);
763 os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN);
764 pos += MOBILITY_DOMAIN_ID_LEN;
765 *pos++ = r0kh_id_len;
766 os_memcpy(pos, r0kh_id, r0kh_id_len);
768 os_memcpy(pos, s0kh_id, ETH_ALEN);
771 sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
772 r0_key_data, sizeof(r0_key_data));
773 os_memcpy(pmk_r0, r0_key_data, PMK_LEN);
776 * PMKR0Name = Truncate-128(SHA-256("FT-R0N" || PMK-R0Name-Salt)
778 addr[0] = (const u8 *) "FT-R0N";
780 addr[1] = r0_key_data + PMK_LEN;
783 sha256_vector(2, addr, len, hash);
784 os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN);
789 * wpa_derive_pmk_r1_name - Derive PMKR1Name
791 * IEEE Std 802.11r-2008 - 8.5.1.5.4
793 void wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id,
794 const u8 *s1kh_id, u8 *pmk_r1_name)
801 * PMKR1Name = Truncate-128(SHA-256("FT-R1N" || PMKR0Name ||
802 * R1KH-ID || S1KH-ID))
804 addr[0] = (const u8 *) "FT-R1N";
806 addr[1] = pmk_r0_name;
807 len[1] = WPA_PMK_NAME_LEN;
809 len[2] = FT_R1KH_ID_LEN;
813 sha256_vector(4, addr, len, hash);
814 os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN);
819 * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0
821 * IEEE Std 802.11r-2008 - 8.5.1.5.4
823 void wpa_derive_pmk_r1(const u8 *pmk_r0, const u8 *pmk_r0_name,
824 const u8 *r1kh_id, const u8 *s1kh_id,
825 u8 *pmk_r1, u8 *pmk_r1_name)
827 u8 buf[FT_R1KH_ID_LEN + ETH_ALEN];
830 /* PMK-R1 = KDF-256(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */
832 os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN);
833 pos += FT_R1KH_ID_LEN;
834 os_memcpy(pos, s1kh_id, ETH_ALEN);
837 sha256_prf(pmk_r0, PMK_LEN, "FT-R1", buf, pos - buf, pmk_r1, PMK_LEN);
839 wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id, pmk_r1_name);
844 * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1
846 * IEEE Std 802.11r-2008 - 8.5.1.5.5
848 void wpa_pmk_r1_to_ptk(const u8 *pmk_r1, const u8 *snonce, const u8 *anonce,
849 const u8 *sta_addr, const u8 *bssid,
850 const u8 *pmk_r1_name,
851 u8 *ptk, size_t ptk_len, u8 *ptk_name)
853 u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN];
859 * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce ||
863 os_memcpy(pos, snonce, WPA_NONCE_LEN);
864 pos += WPA_NONCE_LEN;
865 os_memcpy(pos, anonce, WPA_NONCE_LEN);
866 pos += WPA_NONCE_LEN;
867 os_memcpy(pos, bssid, ETH_ALEN);
869 os_memcpy(pos, sta_addr, ETH_ALEN);
872 sha256_prf(pmk_r1, PMK_LEN, "FT-PTK", buf, pos - buf, ptk, ptk_len);
875 * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce ||
876 * ANonce || BSSID || STA-ADDR))
878 addr[0] = pmk_r1_name;
879 len[0] = WPA_PMK_NAME_LEN;
880 addr[1] = (const u8 *) "FT-PTKN";
883 len[2] = WPA_NONCE_LEN;
885 len[3] = WPA_NONCE_LEN;
891 sha256_vector(6, addr, len, hash);
892 os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN);
895 #endif /* CONFIG_IEEE80211R */
899 * rsn_pmkid - Calculate PMK identifier
900 * @pmk: Pairwise master key
901 * @pmk_len: Length of pmk in bytes
902 * @aa: Authenticator address
903 * @spa: Supplicant address
904 * @pmkid: Buffer for PMKID
905 * @use_sha256: Whether to use SHA256-based KDF
907 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
908 * PMKID = HMAC-SHA1-128(PMK, "PMK Name" || AA || SPA)
910 void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
911 u8 *pmkid, int use_sha256)
913 char *title = "PMK Name";
915 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
916 unsigned char hash[SHA256_MAC_LEN];
918 addr[0] = (u8 *) title;
922 #ifdef CONFIG_IEEE80211W
924 hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash);
926 #endif /* CONFIG_IEEE80211W */
927 hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash);
928 os_memcpy(pmkid, hash, PMKID_LEN);
933 * wpa_cipher_txt - Convert cipher suite to a text string
934 * @cipher: Cipher suite (WPA_CIPHER_* enum)
935 * Returns: Pointer to a text string of the cipher suite name
937 const char * wpa_cipher_txt(int cipher)
940 case WPA_CIPHER_NONE:
942 case WPA_CIPHER_WEP40:
944 case WPA_CIPHER_WEP104:
946 case WPA_CIPHER_TKIP:
948 case WPA_CIPHER_CCMP:
950 case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP:
952 case WPA_CIPHER_GCMP:
954 case WPA_CIPHER_GCMP_256:
956 case WPA_CIPHER_CCMP_256:
958 case WPA_CIPHER_GTK_NOT_USED:
959 return "GTK_NOT_USED";
967 * wpa_key_mgmt_txt - Convert key management suite to a text string
968 * @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum)
969 * @proto: WPA/WPA2 version (WPA_PROTO_*)
970 * Returns: Pointer to a text string of the key management suite name
972 const char * wpa_key_mgmt_txt(int key_mgmt, int proto)
975 case WPA_KEY_MGMT_IEEE8021X:
976 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
977 return "WPA2+WPA/IEEE 802.1X/EAP";
978 return proto == WPA_PROTO_RSN ?
979 "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP";
980 case WPA_KEY_MGMT_PSK:
981 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
982 return "WPA2-PSK+WPA-PSK";
983 return proto == WPA_PROTO_RSN ?
984 "WPA2-PSK" : "WPA-PSK";
985 case WPA_KEY_MGMT_NONE:
987 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
988 return "IEEE 802.1X (no WPA)";
989 #ifdef CONFIG_IEEE80211R
990 case WPA_KEY_MGMT_FT_IEEE8021X:
992 case WPA_KEY_MGMT_FT_PSK:
994 #endif /* CONFIG_IEEE80211R */
995 #ifdef CONFIG_IEEE80211W
996 case WPA_KEY_MGMT_IEEE8021X_SHA256:
997 return "WPA2-EAP-SHA256";
998 case WPA_KEY_MGMT_PSK_SHA256:
999 return "WPA2-PSK-SHA256";
1000 #endif /* CONFIG_IEEE80211W */
1001 case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
1002 return "WPA2-EAP-SUITE-B";
1009 u32 wpa_akm_to_suite(int akm)
1011 if (akm & WPA_KEY_MGMT_FT_IEEE8021X)
1012 return WLAN_AKM_SUITE_FT_8021X;
1013 if (akm & WPA_KEY_MGMT_FT_PSK)
1014 return WLAN_AKM_SUITE_FT_PSK;
1015 if (akm & WPA_KEY_MGMT_IEEE8021X)
1016 return WLAN_AKM_SUITE_8021X;
1017 if (akm & WPA_KEY_MGMT_IEEE8021X_SHA256)
1018 return WLAN_AKM_SUITE_8021X_SHA256;
1019 if (akm & WPA_KEY_MGMT_IEEE8021X)
1020 return WLAN_AKM_SUITE_8021X;
1021 if (akm & WPA_KEY_MGMT_PSK_SHA256)
1022 return WLAN_AKM_SUITE_PSK_SHA256;
1023 if (akm & WPA_KEY_MGMT_PSK)
1024 return WLAN_AKM_SUITE_PSK;
1025 if (akm & WPA_KEY_MGMT_CCKM)
1026 return WLAN_AKM_SUITE_CCKM;
1027 if (akm & WPA_KEY_MGMT_OSEN)
1028 return WLAN_AKM_SUITE_OSEN;
1029 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B)
1030 return WLAN_AKM_SUITE_8021X_SUITE_B;
1035 int wpa_compare_rsn_ie(int ft_initial_assoc,
1036 const u8 *ie1, size_t ie1len,
1037 const u8 *ie2, size_t ie2len)
1039 if (ie1 == NULL || ie2 == NULL)
1042 if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0)
1043 return 0; /* identical IEs */
1045 #ifdef CONFIG_IEEE80211R
1046 if (ft_initial_assoc) {
1047 struct wpa_ie_data ie1d, ie2d;
1049 * The PMKID-List in RSN IE is different between Beacon/Probe
1050 * Response/(Re)Association Request frames and EAPOL-Key
1051 * messages in FT initial mobility domain association. Allow
1052 * for this, but verify that other parts of the RSN IEs are
1055 if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 ||
1056 wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0)
1058 if (ie1d.proto == ie2d.proto &&
1059 ie1d.pairwise_cipher == ie2d.pairwise_cipher &&
1060 ie1d.group_cipher == ie2d.group_cipher &&
1061 ie1d.key_mgmt == ie2d.key_mgmt &&
1062 ie1d.capabilities == ie2d.capabilities &&
1063 ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher)
1066 #endif /* CONFIG_IEEE80211R */
1072 #ifdef CONFIG_IEEE80211R
1073 int wpa_insert_pmkid(u8 *ies, size_t ies_len, const u8 *pmkid)
1075 u8 *start, *end, *rpos, *rend;
1079 end = ies + ies_len;
1081 while (start < end) {
1082 if (*start == WLAN_EID_RSN)
1084 start += 2 + start[1];
1087 wpa_printf(MSG_ERROR, "FT: Could not find RSN IE in "
1091 wpa_hexdump(MSG_DEBUG, "FT: RSN IE before modification",
1092 start, 2 + start[1]);
1094 /* Find start of PMKID-Count */
1096 rend = rpos + start[1];
1098 /* Skip Version and Group Data Cipher Suite */
1100 /* Skip Pairwise Cipher Suite Count and List */
1101 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1102 /* Skip AKM Suite Count and List */
1103 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1106 /* Add RSN Capabilities */
1107 os_memmove(rpos + 2, rpos, end - rpos);
1111 /* Skip RSN Capabilities */
1114 wpa_printf(MSG_ERROR, "FT: Could not parse RSN IE in "
1121 /* No PMKID-Count field included; add it */
1122 os_memmove(rpos + 2 + PMKID_LEN, rpos, end - rpos);
1123 WPA_PUT_LE16(rpos, 1);
1125 os_memcpy(rpos, pmkid, PMKID_LEN);
1126 added += 2 + PMKID_LEN;
1127 start[1] += 2 + PMKID_LEN;
1129 /* PMKID-Count was included; use it */
1130 if (WPA_GET_LE16(rpos) != 0) {
1131 wpa_printf(MSG_ERROR, "FT: Unexpected PMKID "
1132 "in RSN IE in EAPOL-Key data");
1135 WPA_PUT_LE16(rpos, 1);
1137 os_memmove(rpos + PMKID_LEN, rpos, end - rpos);
1138 os_memcpy(rpos, pmkid, PMKID_LEN);
1140 start[1] += PMKID_LEN;
1143 wpa_hexdump(MSG_DEBUG, "FT: RSN IE after modification "
1144 "(PMKID inserted)", start, 2 + start[1]);
1148 #endif /* CONFIG_IEEE80211R */
1151 int wpa_cipher_key_len(int cipher)
1154 case WPA_CIPHER_CCMP_256:
1155 case WPA_CIPHER_GCMP_256:
1156 case WPA_CIPHER_BIP_GMAC_256:
1157 case WPA_CIPHER_BIP_CMAC_256:
1159 case WPA_CIPHER_CCMP:
1160 case WPA_CIPHER_GCMP:
1161 case WPA_CIPHER_AES_128_CMAC:
1162 case WPA_CIPHER_BIP_GMAC_128:
1164 case WPA_CIPHER_TKIP:
1166 case WPA_CIPHER_WEP104:
1168 case WPA_CIPHER_WEP40:
1176 int wpa_cipher_rsc_len(int cipher)
1179 case WPA_CIPHER_CCMP_256:
1180 case WPA_CIPHER_GCMP_256:
1181 case WPA_CIPHER_CCMP:
1182 case WPA_CIPHER_GCMP:
1183 case WPA_CIPHER_TKIP:
1185 case WPA_CIPHER_WEP104:
1186 case WPA_CIPHER_WEP40:
1194 int wpa_cipher_to_alg(int cipher)
1197 case WPA_CIPHER_CCMP_256:
1198 return WPA_ALG_CCMP_256;
1199 case WPA_CIPHER_GCMP_256:
1200 return WPA_ALG_GCMP_256;
1201 case WPA_CIPHER_CCMP:
1202 return WPA_ALG_CCMP;
1203 case WPA_CIPHER_GCMP:
1204 return WPA_ALG_GCMP;
1205 case WPA_CIPHER_TKIP:
1206 return WPA_ALG_TKIP;
1207 case WPA_CIPHER_WEP104:
1208 case WPA_CIPHER_WEP40:
1210 case WPA_CIPHER_AES_128_CMAC:
1211 return WPA_ALG_IGTK;
1212 case WPA_CIPHER_BIP_GMAC_128:
1213 return WPA_ALG_BIP_GMAC_128;
1214 case WPA_CIPHER_BIP_GMAC_256:
1215 return WPA_ALG_BIP_GMAC_256;
1216 case WPA_CIPHER_BIP_CMAC_256:
1217 return WPA_ALG_BIP_CMAC_256;
1219 return WPA_ALG_NONE;
1223 int wpa_cipher_valid_pairwise(int cipher)
1225 return cipher == WPA_CIPHER_CCMP_256 ||
1226 cipher == WPA_CIPHER_GCMP_256 ||
1227 cipher == WPA_CIPHER_CCMP ||
1228 cipher == WPA_CIPHER_GCMP ||
1229 cipher == WPA_CIPHER_TKIP;
1233 u32 wpa_cipher_to_suite(int proto, int cipher)
1235 if (cipher & WPA_CIPHER_CCMP_256)
1236 return RSN_CIPHER_SUITE_CCMP_256;
1237 if (cipher & WPA_CIPHER_GCMP_256)
1238 return RSN_CIPHER_SUITE_GCMP_256;
1239 if (cipher & WPA_CIPHER_CCMP)
1240 return (proto == WPA_PROTO_RSN ?
1241 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
1242 if (cipher & WPA_CIPHER_GCMP)
1243 return RSN_CIPHER_SUITE_GCMP;
1244 if (cipher & WPA_CIPHER_TKIP)
1245 return (proto == WPA_PROTO_RSN ?
1246 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
1247 if (cipher & WPA_CIPHER_WEP104)
1248 return (proto == WPA_PROTO_RSN ?
1249 RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104);
1250 if (cipher & WPA_CIPHER_WEP40)
1251 return (proto == WPA_PROTO_RSN ?
1252 RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40);
1253 if (cipher & WPA_CIPHER_NONE)
1254 return (proto == WPA_PROTO_RSN ?
1255 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
1256 if (cipher & WPA_CIPHER_GTK_NOT_USED)
1257 return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED;
1258 if (cipher & WPA_CIPHER_AES_128_CMAC)
1259 return RSN_CIPHER_SUITE_AES_128_CMAC;
1260 if (cipher & WPA_CIPHER_BIP_GMAC_128)
1261 return RSN_CIPHER_SUITE_BIP_GMAC_128;
1262 if (cipher & WPA_CIPHER_BIP_GMAC_256)
1263 return RSN_CIPHER_SUITE_BIP_GMAC_256;
1264 if (cipher & WPA_CIPHER_BIP_CMAC_256)
1265 return RSN_CIPHER_SUITE_BIP_CMAC_256;
1270 int rsn_cipher_put_suites(u8 *start, int ciphers)
1274 if (ciphers & WPA_CIPHER_CCMP_256) {
1275 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP_256);
1276 pos += RSN_SELECTOR_LEN;
1278 if (ciphers & WPA_CIPHER_GCMP_256) {
1279 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP_256);
1280 pos += RSN_SELECTOR_LEN;
1282 if (ciphers & WPA_CIPHER_CCMP) {
1283 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
1284 pos += RSN_SELECTOR_LEN;
1286 if (ciphers & WPA_CIPHER_GCMP) {
1287 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP);
1288 pos += RSN_SELECTOR_LEN;
1290 if (ciphers & WPA_CIPHER_TKIP) {
1291 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
1292 pos += RSN_SELECTOR_LEN;
1294 if (ciphers & WPA_CIPHER_NONE) {
1295 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
1296 pos += RSN_SELECTOR_LEN;
1299 return (pos - start) / RSN_SELECTOR_LEN;
1303 int wpa_cipher_put_suites(u8 *start, int ciphers)
1307 if (ciphers & WPA_CIPHER_CCMP) {
1308 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
1309 pos += WPA_SELECTOR_LEN;
1311 if (ciphers & WPA_CIPHER_TKIP) {
1312 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
1313 pos += WPA_SELECTOR_LEN;
1315 if (ciphers & WPA_CIPHER_NONE) {
1316 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
1317 pos += WPA_SELECTOR_LEN;
1320 return (pos - start) / RSN_SELECTOR_LEN;
1324 int wpa_pick_pairwise_cipher(int ciphers, int none_allowed)
1326 if (ciphers & WPA_CIPHER_CCMP_256)
1327 return WPA_CIPHER_CCMP_256;
1328 if (ciphers & WPA_CIPHER_GCMP_256)
1329 return WPA_CIPHER_GCMP_256;
1330 if (ciphers & WPA_CIPHER_CCMP)
1331 return WPA_CIPHER_CCMP;
1332 if (ciphers & WPA_CIPHER_GCMP)
1333 return WPA_CIPHER_GCMP;
1334 if (ciphers & WPA_CIPHER_TKIP)
1335 return WPA_CIPHER_TKIP;
1336 if (none_allowed && (ciphers & WPA_CIPHER_NONE))
1337 return WPA_CIPHER_NONE;
1342 int wpa_pick_group_cipher(int ciphers)
1344 if (ciphers & WPA_CIPHER_CCMP_256)
1345 return WPA_CIPHER_CCMP_256;
1346 if (ciphers & WPA_CIPHER_GCMP_256)
1347 return WPA_CIPHER_GCMP_256;
1348 if (ciphers & WPA_CIPHER_CCMP)
1349 return WPA_CIPHER_CCMP;
1350 if (ciphers & WPA_CIPHER_GCMP)
1351 return WPA_CIPHER_GCMP;
1352 if (ciphers & WPA_CIPHER_GTK_NOT_USED)
1353 return WPA_CIPHER_GTK_NOT_USED;
1354 if (ciphers & WPA_CIPHER_TKIP)
1355 return WPA_CIPHER_TKIP;
1356 if (ciphers & WPA_CIPHER_WEP104)
1357 return WPA_CIPHER_WEP104;
1358 if (ciphers & WPA_CIPHER_WEP40)
1359 return WPA_CIPHER_WEP40;
1364 int wpa_parse_cipher(const char *value)
1367 char *start, *end, *buf;
1369 buf = os_strdup(value);
1374 while (*start != '\0') {
1375 while (*start == ' ' || *start == '\t')
1380 while (*end != ' ' && *end != '\t' && *end != '\0')
1382 last = *end == '\0';
1384 if (os_strcmp(start, "CCMP-256") == 0)
1385 val |= WPA_CIPHER_CCMP_256;
1386 else if (os_strcmp(start, "GCMP-256") == 0)
1387 val |= WPA_CIPHER_GCMP_256;
1388 else if (os_strcmp(start, "CCMP") == 0)
1389 val |= WPA_CIPHER_CCMP;
1390 else if (os_strcmp(start, "GCMP") == 0)
1391 val |= WPA_CIPHER_GCMP;
1392 else if (os_strcmp(start, "TKIP") == 0)
1393 val |= WPA_CIPHER_TKIP;
1394 else if (os_strcmp(start, "WEP104") == 0)
1395 val |= WPA_CIPHER_WEP104;
1396 else if (os_strcmp(start, "WEP40") == 0)
1397 val |= WPA_CIPHER_WEP40;
1398 else if (os_strcmp(start, "NONE") == 0)
1399 val |= WPA_CIPHER_NONE;
1400 else if (os_strcmp(start, "GTK_NOT_USED") == 0)
1401 val |= WPA_CIPHER_GTK_NOT_USED;
1417 int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim)
1422 if (ciphers & WPA_CIPHER_CCMP_256) {
1423 ret = os_snprintf(pos, end - pos, "%sCCMP-256",
1424 pos == start ? "" : delim);
1425 if (ret < 0 || ret >= end - pos)
1429 if (ciphers & WPA_CIPHER_GCMP_256) {
1430 ret = os_snprintf(pos, end - pos, "%sGCMP-256",
1431 pos == start ? "" : delim);
1432 if (ret < 0 || ret >= end - pos)
1436 if (ciphers & WPA_CIPHER_CCMP) {
1437 ret = os_snprintf(pos, end - pos, "%sCCMP",
1438 pos == start ? "" : delim);
1439 if (ret < 0 || ret >= end - pos)
1443 if (ciphers & WPA_CIPHER_GCMP) {
1444 ret = os_snprintf(pos, end - pos, "%sGCMP",
1445 pos == start ? "" : delim);
1446 if (ret < 0 || ret >= end - pos)
1450 if (ciphers & WPA_CIPHER_TKIP) {
1451 ret = os_snprintf(pos, end - pos, "%sTKIP",
1452 pos == start ? "" : delim);
1453 if (ret < 0 || ret >= end - pos)
1457 if (ciphers & WPA_CIPHER_WEP104) {
1458 ret = os_snprintf(pos, end - pos, "%sWEP104",
1459 pos == start ? "" : delim);
1460 if (ret < 0 || ret >= end - pos)
1464 if (ciphers & WPA_CIPHER_WEP40) {
1465 ret = os_snprintf(pos, end - pos, "%sWEP40",
1466 pos == start ? "" : delim);
1467 if (ret < 0 || ret >= end - pos)
1471 if (ciphers & WPA_CIPHER_NONE) {
1472 ret = os_snprintf(pos, end - pos, "%sNONE",
1473 pos == start ? "" : delim);
1474 if (ret < 0 || ret >= end - pos)
1483 int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise)
1487 /* Select group cipher based on the enabled pairwise cipher suites */
1489 pairwise |= wpa_pairwise;
1491 pairwise |= rsn_pairwise;
1493 if (pairwise & WPA_CIPHER_TKIP)
1494 return WPA_CIPHER_TKIP;
1495 if ((pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP)
1496 return WPA_CIPHER_GCMP;
1497 if ((pairwise & (WPA_CIPHER_GCMP_256 | WPA_CIPHER_CCMP |
1498 WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP_256)
1499 return WPA_CIPHER_GCMP_256;
1500 if ((pairwise & (WPA_CIPHER_CCMP_256 | WPA_CIPHER_CCMP |
1501 WPA_CIPHER_GCMP)) == WPA_CIPHER_CCMP_256)
1502 return WPA_CIPHER_CCMP_256;
1503 return WPA_CIPHER_CCMP;