--- /dev/null
+/*
+ * hostapd - WPA/RSN IE and KDE definitions
+ * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "utils/includes.h"
+
+#include "utils/common.h"
+#include "common/ieee802_11_defs.h"
+#include "eapol_auth/eapol_auth_sm.h"
+#include "ap_config.h"
+#include "ieee802_11.h"
+#include "wpa_auth.h"
+#include "pmksa_cache_auth.h"
+#include "wpa_auth_ie.h"
+#include "wpa_auth_i.h"
+
+
+static int wpa_write_wpa_ie(struct wpa_auth_config *conf, u8 *buf, size_t len)
+{
+ struct wpa_ie_hdr *hdr;
+ int num_suites;
+ u8 *pos, *count;
+
+ hdr = (struct wpa_ie_hdr *) buf;
+ hdr->elem_id = WLAN_EID_VENDOR_SPECIFIC;
+ RSN_SELECTOR_PUT(hdr->oui, WPA_OUI_TYPE);
+ WPA_PUT_LE16(hdr->version, WPA_VERSION);
+ pos = (u8 *) (hdr + 1);
+
+ if (conf->wpa_group == WPA_CIPHER_CCMP) {
+ RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
+ } else if (conf->wpa_group == WPA_CIPHER_TKIP) {
+ RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
+ } else if (conf->wpa_group == WPA_CIPHER_WEP104) {
+ RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_WEP104);
+ } else if (conf->wpa_group == WPA_CIPHER_WEP40) {
+ RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_WEP40);
+ } else {
+ wpa_printf(MSG_DEBUG, "Invalid group cipher (%d).",
+ conf->wpa_group);
+ return -1;
+ }
+ pos += WPA_SELECTOR_LEN;
+
+ num_suites = 0;
+ count = pos;
+ pos += 2;
+
+ if (conf->wpa_pairwise & WPA_CIPHER_CCMP) {
+ RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
+ pos += WPA_SELECTOR_LEN;
+ num_suites++;
+ }
+ if (conf->wpa_pairwise & WPA_CIPHER_TKIP) {
+ RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
+ pos += WPA_SELECTOR_LEN;
+ num_suites++;
+ }
+ if (conf->wpa_pairwise & WPA_CIPHER_NONE) {
+ RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
+ pos += WPA_SELECTOR_LEN;
+ num_suites++;
+ }
+
+ if (num_suites == 0) {
+ wpa_printf(MSG_DEBUG, "Invalid pairwise cipher (%d).",
+ conf->wpa_pairwise);
+ return -1;
+ }
+ WPA_PUT_LE16(count, num_suites);
+
+ num_suites = 0;
+ count = pos;
+ pos += 2;
+
+ if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X) {
+ RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
+ pos += WPA_SELECTOR_LEN;
+ num_suites++;
+ }
+ if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK) {
+ RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
+ pos += WPA_SELECTOR_LEN;
+ num_suites++;
+ }
+
+ if (num_suites == 0) {
+ wpa_printf(MSG_DEBUG, "Invalid key management type (%d).",
+ conf->wpa_key_mgmt);
+ return -1;
+ }
+ WPA_PUT_LE16(count, num_suites);
+
+ /* WPA Capabilities; use defaults, so no need to include it */
+
+ hdr->len = (pos - buf) - 2;
+
+ return pos - buf;
+}
+
+
+int wpa_write_rsn_ie(struct wpa_auth_config *conf, u8 *buf, size_t len,
+ const u8 *pmkid)
+{
+ struct rsn_ie_hdr *hdr;
+ int num_suites;
+ u8 *pos, *count;
+ u16 capab;
+
+ hdr = (struct rsn_ie_hdr *) buf;
+ hdr->elem_id = WLAN_EID_RSN;
+ WPA_PUT_LE16(hdr->version, RSN_VERSION);
+ pos = (u8 *) (hdr + 1);
+
+ if (conf->wpa_group == WPA_CIPHER_CCMP) {
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
+ } else if (conf->wpa_group == WPA_CIPHER_TKIP) {
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
+ } else if (conf->wpa_group == WPA_CIPHER_WEP104) {
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_WEP104);
+ } else if (conf->wpa_group == WPA_CIPHER_WEP40) {
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_WEP40);
+ } else {
+ wpa_printf(MSG_DEBUG, "Invalid group cipher (%d).",
+ conf->wpa_group);
+ return -1;
+ }
+ pos += RSN_SELECTOR_LEN;
+
+ num_suites = 0;
+ count = pos;
+ pos += 2;
+
+ if (conf->rsn_pairwise & WPA_CIPHER_CCMP) {
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
+ pos += RSN_SELECTOR_LEN;
+ num_suites++;
+ }
+ if (conf->rsn_pairwise & WPA_CIPHER_TKIP) {
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
+ pos += RSN_SELECTOR_LEN;
+ num_suites++;
+ }
+ if (conf->rsn_pairwise & WPA_CIPHER_NONE) {
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
+ pos += RSN_SELECTOR_LEN;
+ num_suites++;
+ }
+
+ if (num_suites == 0) {
+ wpa_printf(MSG_DEBUG, "Invalid pairwise cipher (%d).",
+ conf->rsn_pairwise);
+ return -1;
+ }
+ WPA_PUT_LE16(count, num_suites);
+
+ num_suites = 0;
+ count = pos;
+ pos += 2;
+
+ if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X) {
+ RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_UNSPEC_802_1X);
+ pos += RSN_SELECTOR_LEN;
+ num_suites++;
+ }
+ if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK) {
+ RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X);
+ pos += RSN_SELECTOR_LEN;
+ num_suites++;
+ }
+#ifdef CONFIG_IEEE80211R
+ if (conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X) {
+ RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
+ pos += RSN_SELECTOR_LEN;
+ num_suites++;
+ }
+ if (conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_PSK) {
+ RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
+ pos += RSN_SELECTOR_LEN;
+ num_suites++;
+ }
+#endif /* CONFIG_IEEE80211R */
+#ifdef CONFIG_IEEE80211W
+ if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256) {
+ RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SHA256);
+ pos += RSN_SELECTOR_LEN;
+ num_suites++;
+ }
+ if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK_SHA256) {
+ RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_SHA256);
+ pos += RSN_SELECTOR_LEN;
+ num_suites++;
+ }
+#endif /* CONFIG_IEEE80211W */
+
+ if (num_suites == 0) {
+ wpa_printf(MSG_DEBUG, "Invalid key management type (%d).",
+ conf->wpa_key_mgmt);
+ return -1;
+ }
+ WPA_PUT_LE16(count, num_suites);
+
+ /* RSN Capabilities */
+ capab = 0;
+ if (conf->rsn_preauth)
+ capab |= WPA_CAPABILITY_PREAUTH;
+ if (conf->peerkey)
+ capab |= WPA_CAPABILITY_PEERKEY_ENABLED;
+ if (conf->wmm_enabled) {
+ /* 4 PTKSA replay counters when using WMM */
+ capab |= (RSN_NUM_REPLAY_COUNTERS_16 << 2);
+ }
+#ifdef CONFIG_IEEE80211W
+ if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
+ capab |= WPA_CAPABILITY_MFPC;
+ if (conf->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED)
+ capab |= WPA_CAPABILITY_MFPR;
+ }
+#endif /* CONFIG_IEEE80211W */
+ WPA_PUT_LE16(pos, capab);
+ pos += 2;
+
+ if (pmkid) {
+ if (pos + 2 + PMKID_LEN > buf + len)
+ return -1;
+ /* PMKID Count */
+ WPA_PUT_LE16(pos, 1);
+ pos += 2;
+ os_memcpy(pos, pmkid, PMKID_LEN);
+ pos += PMKID_LEN;
+ }
+
+#ifdef CONFIG_IEEE80211W
+ if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
+ if (pos + 2 + 4 > buf + len)
+ return -1;
+ if (pmkid == NULL) {
+ /* PMKID Count */
+ WPA_PUT_LE16(pos, 0);
+ pos += 2;
+ }
+
+ /* Management Group Cipher Suite */
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC);
+ pos += RSN_SELECTOR_LEN;
+ }
+#endif /* CONFIG_IEEE80211W */
+
+ hdr->len = (pos - buf) - 2;
+
+ return pos - buf;
+}
+
+
+int wpa_auth_gen_wpa_ie(struct wpa_authenticator *wpa_auth)
+{
+ u8 *pos, buf[128];
+ int res;
+
+ pos = buf;
+
+ if (wpa_auth->conf.wpa & WPA_PROTO_RSN) {
+ res = wpa_write_rsn_ie(&wpa_auth->conf,
+ pos, buf + sizeof(buf) - pos, NULL);
+ if (res < 0)
+ return res;
+ pos += res;
+ }
+#ifdef CONFIG_IEEE80211R
+ if (wpa_auth->conf.wpa_key_mgmt &
+ (WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK)) {
+ res = wpa_write_mdie(&wpa_auth->conf, pos,
+ buf + sizeof(buf) - pos);
+ if (res < 0)
+ return res;
+ pos += res;
+ }
+#endif /* CONFIG_IEEE80211R */
+ if (wpa_auth->conf.wpa & WPA_PROTO_WPA) {
+ res = wpa_write_wpa_ie(&wpa_auth->conf,
+ pos, buf + sizeof(buf) - pos);
+ if (res < 0)
+ return res;
+ pos += res;
+ }
+
+ os_free(wpa_auth->wpa_ie);
+ wpa_auth->wpa_ie = os_malloc(pos - buf);
+ if (wpa_auth->wpa_ie == NULL)
+ return -1;
+ os_memcpy(wpa_auth->wpa_ie, buf, pos - buf);
+ wpa_auth->wpa_ie_len = pos - buf;
+
+ return 0;
+}
+
+
+u8 * wpa_add_kde(u8 *pos, u32 kde, const u8 *data, size_t data_len,
+ const u8 *data2, size_t data2_len)
+{
+ *pos++ = WLAN_EID_VENDOR_SPECIFIC;
+ *pos++ = RSN_SELECTOR_LEN + data_len + data2_len;
+ RSN_SELECTOR_PUT(pos, kde);
+ pos += RSN_SELECTOR_LEN;
+ os_memcpy(pos, data, data_len);
+ pos += data_len;
+ if (data2) {
+ os_memcpy(pos, data2, data2_len);
+ pos += data2_len;
+ }
+ return pos;
+}
+
+
+static int wpa_selector_to_bitfield(const u8 *s)
+{
+ if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
+ return WPA_CIPHER_NONE;
+ if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP40)
+ return WPA_CIPHER_WEP40;
+ if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
+ return WPA_CIPHER_TKIP;
+ if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
+ return WPA_CIPHER_CCMP;
+ if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP104)
+ return WPA_CIPHER_WEP104;
+ return 0;
+}
+
+
+static int wpa_key_mgmt_to_bitfield(const u8 *s)
+{
+ if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
+ return WPA_KEY_MGMT_IEEE8021X;
+ if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
+ return WPA_KEY_MGMT_PSK;
+ if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
+ return WPA_KEY_MGMT_WPA_NONE;
+ return 0;
+}
+
+
+static int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
+ struct wpa_ie_data *data)
+{
+ const struct wpa_ie_hdr *hdr;
+ const u8 *pos;
+ int left;
+ int i, count;
+
+ os_memset(data, 0, sizeof(*data));
+ data->pairwise_cipher = WPA_CIPHER_TKIP;
+ data->group_cipher = WPA_CIPHER_TKIP;
+ data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
+ data->mgmt_group_cipher = 0;
+
+ if (wpa_ie_len < sizeof(struct wpa_ie_hdr))
+ return -1;
+
+ hdr = (const struct wpa_ie_hdr *) wpa_ie;
+
+ if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
+ hdr->len != wpa_ie_len - 2 ||
+ RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
+ WPA_GET_LE16(hdr->version) != WPA_VERSION) {
+ return -2;
+ }
+
+ pos = (const u8 *) (hdr + 1);
+ left = wpa_ie_len - sizeof(*hdr);
+
+ if (left >= WPA_SELECTOR_LEN) {
+ data->group_cipher = wpa_selector_to_bitfield(pos);
+ pos += WPA_SELECTOR_LEN;
+ left -= WPA_SELECTOR_LEN;
+ } else if (left > 0)
+ return -3;
+
+ if (left >= 2) {
+ data->pairwise_cipher = 0;
+ count = WPA_GET_LE16(pos);
+ pos += 2;
+ left -= 2;
+ if (count == 0 || left < count * WPA_SELECTOR_LEN)
+ return -4;
+ for (i = 0; i < count; i++) {
+ data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
+ pos += WPA_SELECTOR_LEN;
+ left -= WPA_SELECTOR_LEN;
+ }
+ } else if (left == 1)
+ return -5;
+
+ if (left >= 2) {
+ data->key_mgmt = 0;
+ count = WPA_GET_LE16(pos);
+ pos += 2;
+ left -= 2;
+ if (count == 0 || left < count * WPA_SELECTOR_LEN)
+ return -6;
+ for (i = 0; i < count; i++) {
+ data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
+ pos += WPA_SELECTOR_LEN;
+ left -= WPA_SELECTOR_LEN;
+ }
+ } else if (left == 1)
+ return -7;
+
+ if (left >= 2) {
+ data->capabilities = WPA_GET_LE16(pos);
+ pos += 2;
+ left -= 2;
+ }
+
+ if (left > 0) {
+ return -8;
+ }
+
+ return 0;
+}
+
+
+struct wpa_auth_okc_iter_data {
+ struct rsn_pmksa_cache_entry *pmksa;
+ const u8 *aa;
+ const u8 *spa;
+ const u8 *pmkid;
+};
+
+
+static int wpa_auth_okc_iter(struct wpa_authenticator *a, void *ctx)
+{
+ struct wpa_auth_okc_iter_data *data = ctx;
+ data->pmksa = pmksa_cache_get_okc(a->pmksa, data->aa, data->spa,
+ data->pmkid);
+ if (data->pmksa)
+ return 1;
+ return 0;
+}
+
+
+int wpa_validate_wpa_ie(struct wpa_authenticator *wpa_auth,
+ struct wpa_state_machine *sm,
+ const u8 *wpa_ie, size_t wpa_ie_len,
+ const u8 *mdie, size_t mdie_len)
+{
+ struct wpa_ie_data data;
+ int ciphers, key_mgmt, res, version;
+ u32 selector;
+ size_t i;
+ const u8 *pmkid = NULL;
+
+ if (wpa_auth == NULL || sm == NULL)
+ return WPA_NOT_ENABLED;
+
+ if (wpa_ie == NULL || wpa_ie_len < 1)
+ return WPA_INVALID_IE;
+
+ if (wpa_ie[0] == WLAN_EID_RSN)
+ version = WPA_PROTO_RSN;
+ else
+ version = WPA_PROTO_WPA;
+
+ if (!(wpa_auth->conf.wpa & version)) {
+ wpa_printf(MSG_DEBUG, "Invalid WPA proto (%d) from " MACSTR,
+ version, MAC2STR(sm->addr));
+ return WPA_INVALID_PROTO;
+ }
+
+ if (version == WPA_PROTO_RSN) {
+ res = wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, &data);
+
+ selector = RSN_AUTH_KEY_MGMT_UNSPEC_802_1X;
+ if (0) {
+ }
+#ifdef CONFIG_IEEE80211R
+ else if (data.key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
+ selector = RSN_AUTH_KEY_MGMT_FT_802_1X;
+ else if (data.key_mgmt & WPA_KEY_MGMT_FT_PSK)
+ selector = RSN_AUTH_KEY_MGMT_FT_PSK;
+#endif /* CONFIG_IEEE80211R */
+#ifdef CONFIG_IEEE80211W
+ else if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256)
+ selector = RSN_AUTH_KEY_MGMT_802_1X_SHA256;
+ else if (data.key_mgmt & WPA_KEY_MGMT_PSK_SHA256)
+ selector = RSN_AUTH_KEY_MGMT_PSK_SHA256;
+#endif /* CONFIG_IEEE80211W */
+ else if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X)
+ selector = RSN_AUTH_KEY_MGMT_UNSPEC_802_1X;
+ else if (data.key_mgmt & WPA_KEY_MGMT_PSK)
+ selector = RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X;
+ wpa_auth->dot11RSNAAuthenticationSuiteSelected = selector;
+
+ selector = RSN_CIPHER_SUITE_CCMP;
+ if (data.pairwise_cipher & WPA_CIPHER_CCMP)
+ selector = RSN_CIPHER_SUITE_CCMP;
+ else if (data.pairwise_cipher & WPA_CIPHER_TKIP)
+ selector = RSN_CIPHER_SUITE_TKIP;
+ else if (data.pairwise_cipher & WPA_CIPHER_WEP104)
+ selector = RSN_CIPHER_SUITE_WEP104;
+ else if (data.pairwise_cipher & WPA_CIPHER_WEP40)
+ selector = RSN_CIPHER_SUITE_WEP40;
+ else if (data.pairwise_cipher & WPA_CIPHER_NONE)
+ selector = RSN_CIPHER_SUITE_NONE;
+ wpa_auth->dot11RSNAPairwiseCipherSelected = selector;
+
+ selector = RSN_CIPHER_SUITE_CCMP;
+ if (data.group_cipher & WPA_CIPHER_CCMP)
+ selector = RSN_CIPHER_SUITE_CCMP;
+ else if (data.group_cipher & WPA_CIPHER_TKIP)
+ selector = RSN_CIPHER_SUITE_TKIP;
+ else if (data.group_cipher & WPA_CIPHER_WEP104)
+ selector = RSN_CIPHER_SUITE_WEP104;
+ else if (data.group_cipher & WPA_CIPHER_WEP40)
+ selector = RSN_CIPHER_SUITE_WEP40;
+ else if (data.group_cipher & WPA_CIPHER_NONE)
+ selector = RSN_CIPHER_SUITE_NONE;
+ wpa_auth->dot11RSNAGroupCipherSelected = selector;
+ } else {
+ res = wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, &data);
+
+ selector = WPA_AUTH_KEY_MGMT_UNSPEC_802_1X;
+ if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X)
+ selector = WPA_AUTH_KEY_MGMT_UNSPEC_802_1X;
+ else if (data.key_mgmt & WPA_KEY_MGMT_PSK)
+ selector = WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X;
+ wpa_auth->dot11RSNAAuthenticationSuiteSelected = selector;
+
+ selector = WPA_CIPHER_SUITE_TKIP;
+ if (data.pairwise_cipher & WPA_CIPHER_CCMP)
+ selector = WPA_CIPHER_SUITE_CCMP;
+ else if (data.pairwise_cipher & WPA_CIPHER_TKIP)
+ selector = WPA_CIPHER_SUITE_TKIP;
+ else if (data.pairwise_cipher & WPA_CIPHER_WEP104)
+ selector = WPA_CIPHER_SUITE_WEP104;
+ else if (data.pairwise_cipher & WPA_CIPHER_WEP40)
+ selector = WPA_CIPHER_SUITE_WEP40;
+ else if (data.pairwise_cipher & WPA_CIPHER_NONE)
+ selector = WPA_CIPHER_SUITE_NONE;
+ wpa_auth->dot11RSNAPairwiseCipherSelected = selector;
+
+ selector = WPA_CIPHER_SUITE_TKIP;
+ if (data.group_cipher & WPA_CIPHER_CCMP)
+ selector = WPA_CIPHER_SUITE_CCMP;
+ else if (data.group_cipher & WPA_CIPHER_TKIP)
+ selector = WPA_CIPHER_SUITE_TKIP;
+ else if (data.group_cipher & WPA_CIPHER_WEP104)
+ selector = WPA_CIPHER_SUITE_WEP104;
+ else if (data.group_cipher & WPA_CIPHER_WEP40)
+ selector = WPA_CIPHER_SUITE_WEP40;
+ else if (data.group_cipher & WPA_CIPHER_NONE)
+ selector = WPA_CIPHER_SUITE_NONE;
+ wpa_auth->dot11RSNAGroupCipherSelected = selector;
+ }
+ if (res) {
+ wpa_printf(MSG_DEBUG, "Failed to parse WPA/RSN IE from "
+ MACSTR " (res=%d)", MAC2STR(sm->addr), res);
+ wpa_hexdump(MSG_DEBUG, "WPA/RSN IE", wpa_ie, wpa_ie_len);
+ return WPA_INVALID_IE;
+ }
+
+ if (data.group_cipher != wpa_auth->conf.wpa_group) {
+ wpa_printf(MSG_DEBUG, "Invalid WPA group cipher (0x%x) from "
+ MACSTR, data.group_cipher, MAC2STR(sm->addr));
+ return WPA_INVALID_GROUP;
+ }
+
+ key_mgmt = data.key_mgmt & wpa_auth->conf.wpa_key_mgmt;
+ if (!key_mgmt) {
+ wpa_printf(MSG_DEBUG, "Invalid WPA key mgmt (0x%x) from "
+ MACSTR, data.key_mgmt, MAC2STR(sm->addr));
+ return WPA_INVALID_AKMP;
+ }
+ if (0) {
+ }
+#ifdef CONFIG_IEEE80211R
+ else if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
+ sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
+ else if (key_mgmt & WPA_KEY_MGMT_FT_PSK)
+ sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_PSK;
+#endif /* CONFIG_IEEE80211R */
+#ifdef CONFIG_IEEE80211W
+ else if (key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256)
+ sm->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
+ else if (key_mgmt & WPA_KEY_MGMT_PSK_SHA256)
+ sm->wpa_key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
+#endif /* CONFIG_IEEE80211W */
+ else if (key_mgmt & WPA_KEY_MGMT_IEEE8021X)
+ sm->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X;
+ else
+ sm->wpa_key_mgmt = WPA_KEY_MGMT_PSK;
+
+ if (version == WPA_PROTO_RSN)
+ ciphers = data.pairwise_cipher & wpa_auth->conf.rsn_pairwise;
+ else
+ ciphers = data.pairwise_cipher & wpa_auth->conf.wpa_pairwise;
+ if (!ciphers) {
+ wpa_printf(MSG_DEBUG, "Invalid %s pairwise cipher (0x%x) "
+ "from " MACSTR,
+ version == WPA_PROTO_RSN ? "RSN" : "WPA",
+ data.pairwise_cipher, MAC2STR(sm->addr));
+ return WPA_INVALID_PAIRWISE;
+ }
+
+#ifdef CONFIG_IEEE80211W
+ if (wpa_auth->conf.ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
+ if (!(data.capabilities & WPA_CAPABILITY_MFPC)) {
+ wpa_printf(MSG_DEBUG, "Management frame protection "
+ "required, but client did not enable it");
+ return WPA_MGMT_FRAME_PROTECTION_VIOLATION;
+ }
+
+ if (ciphers & WPA_CIPHER_TKIP) {
+ wpa_printf(MSG_DEBUG, "Management frame protection "
+ "cannot use TKIP");
+ return WPA_MGMT_FRAME_PROTECTION_VIOLATION;
+ }
+
+ if (data.mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC) {
+ wpa_printf(MSG_DEBUG, "Unsupported management group "
+ "cipher %d", data.mgmt_group_cipher);
+ return WPA_INVALID_MGMT_GROUP_CIPHER;
+ }
+ }
+
+ if (wpa_auth->conf.ieee80211w == NO_MGMT_FRAME_PROTECTION ||
+ !(data.capabilities & WPA_CAPABILITY_MFPC))
+ sm->mgmt_frame_prot = 0;
+ else
+ sm->mgmt_frame_prot = 1;
+#endif /* CONFIG_IEEE80211W */
+
+#ifdef CONFIG_IEEE80211R
+ if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
+ if (mdie == NULL || mdie_len < MOBILITY_DOMAIN_ID_LEN + 1) {
+ wpa_printf(MSG_DEBUG, "RSN: Trying to use FT, but "
+ "MDIE not included");
+ return WPA_INVALID_MDIE;
+ }
+ if (os_memcmp(mdie, wpa_auth->conf.mobility_domain,
+ MOBILITY_DOMAIN_ID_LEN) != 0) {
+ wpa_hexdump(MSG_DEBUG, "RSN: Attempted to use unknown "
+ "MDIE", mdie, MOBILITY_DOMAIN_ID_LEN);
+ return WPA_INVALID_MDIE;
+ }
+ }
+#endif /* CONFIG_IEEE80211R */
+
+ if (ciphers & WPA_CIPHER_CCMP)
+ sm->pairwise = WPA_CIPHER_CCMP;
+ else
+ sm->pairwise = WPA_CIPHER_TKIP;
+
+ /* TODO: clear WPA/WPA2 state if STA changes from one to another */
+ if (wpa_ie[0] == WLAN_EID_RSN)
+ sm->wpa = WPA_VERSION_WPA2;
+ else
+ sm->wpa = WPA_VERSION_WPA;
+
+ sm->pmksa = NULL;
+ for (i = 0; i < data.num_pmkid; i++) {
+ wpa_hexdump(MSG_DEBUG, "RSN IE: STA PMKID",
+ &data.pmkid[i * PMKID_LEN], PMKID_LEN);
+ sm->pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sm->addr,
+ &data.pmkid[i * PMKID_LEN]);
+ if (sm->pmksa) {
+ pmkid = sm->pmksa->pmkid;
+ break;
+ }
+ }
+ for (i = 0; sm->pmksa == NULL && wpa_auth->conf.okc &&
+ i < data.num_pmkid; i++) {
+ struct wpa_auth_okc_iter_data idata;
+ idata.pmksa = NULL;
+ idata.aa = wpa_auth->addr;
+ idata.spa = sm->addr;
+ idata.pmkid = &data.pmkid[i * PMKID_LEN];
+ wpa_auth_for_each_auth(wpa_auth, wpa_auth_okc_iter, &idata);
+ if (idata.pmksa) {
+ wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
+ "OKC match for PMKID");
+ sm->pmksa = pmksa_cache_add_okc(wpa_auth->pmksa,
+ idata.pmksa,
+ wpa_auth->addr,
+ idata.pmkid);
+ pmkid = idata.pmkid;
+ break;
+ }
+ }
+ if (sm->pmksa) {
+ wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
+ "PMKID found from PMKSA cache "
+ "eap_type=%d vlan_id=%d",
+ sm->pmksa->eap_type_authsrv,
+ sm->pmksa->vlan_id);
+ os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmkid, PMKID_LEN);
+ }
+
+ if (sm->wpa_ie == NULL || sm->wpa_ie_len < wpa_ie_len) {
+ os_free(sm->wpa_ie);
+ sm->wpa_ie = os_malloc(wpa_ie_len);
+ if (sm->wpa_ie == NULL)
+ return WPA_ALLOC_FAIL;
+ }
+ os_memcpy(sm->wpa_ie, wpa_ie, wpa_ie_len);
+ sm->wpa_ie_len = wpa_ie_len;
+
+ return WPA_IE_OK;
+}
+
+
+/**
+ * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs
+ * @pos: Pointer to the IE header
+ * @end: Pointer to the end of the Key Data buffer
+ * @ie: Pointer to parsed IE data
+ * Returns: 0 on success, 1 if end mark is found, -1 on failure
+ */
+static int wpa_parse_generic(const u8 *pos, const u8 *end,
+ struct wpa_eapol_ie_parse *ie)
+{
+ if (pos[1] == 0)
+ return 1;
+
+ if (pos[1] >= 6 &&
+ RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE &&
+ pos[2 + WPA_SELECTOR_LEN] == 1 &&
+ pos[2 + WPA_SELECTOR_LEN + 1] == 0) {
+ ie->wpa_ie = pos;
+ ie->wpa_ie_len = pos[1] + 2;
+ return 0;
+ }
+
+ if (pos + 1 + RSN_SELECTOR_LEN < end &&
+ pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN &&
+ RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) {
+ ie->pmkid = pos + 2 + RSN_SELECTOR_LEN;
+ return 0;
+ }
+
+ if (pos[1] > RSN_SELECTOR_LEN + 2 &&
+ RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) {
+ ie->gtk = pos + 2 + RSN_SELECTOR_LEN;
+ ie->gtk_len = pos[1] - RSN_SELECTOR_LEN;
+ return 0;
+ }
+
+ if (pos[1] > RSN_SELECTOR_LEN + 2 &&
+ RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) {
+ ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN;
+ ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN;
+ return 0;
+ }
+
+#ifdef CONFIG_PEERKEY
+ if (pos[1] > RSN_SELECTOR_LEN + 2 &&
+ RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_SMK) {
+ ie->smk = pos + 2 + RSN_SELECTOR_LEN;
+ ie->smk_len = pos[1] - RSN_SELECTOR_LEN;
+ return 0;
+ }
+
+ if (pos[1] > RSN_SELECTOR_LEN + 2 &&
+ RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_NONCE) {
+ ie->nonce = pos + 2 + RSN_SELECTOR_LEN;
+ ie->nonce_len = pos[1] - RSN_SELECTOR_LEN;
+ return 0;
+ }
+
+ if (pos[1] > RSN_SELECTOR_LEN + 2 &&
+ RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_LIFETIME) {
+ ie->lifetime = pos + 2 + RSN_SELECTOR_LEN;
+ ie->lifetime_len = pos[1] - RSN_SELECTOR_LEN;
+ return 0;
+ }
+
+ if (pos[1] > RSN_SELECTOR_LEN + 2 &&
+ RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_ERROR) {
+ ie->error = pos + 2 + RSN_SELECTOR_LEN;
+ ie->error_len = pos[1] - RSN_SELECTOR_LEN;
+ return 0;
+ }
+#endif /* CONFIG_PEERKEY */
+
+#ifdef CONFIG_IEEE80211W
+ if (pos[1] > RSN_SELECTOR_LEN + 2 &&
+ RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) {
+ ie->igtk = pos + 2 + RSN_SELECTOR_LEN;
+ ie->igtk_len = pos[1] - RSN_SELECTOR_LEN;
+ return 0;
+ }
+#endif /* CONFIG_IEEE80211W */
+
+ return 0;
+}
+
+
+/**
+ * wpa_parse_kde_ies - Parse EAPOL-Key Key Data IEs
+ * @buf: Pointer to the Key Data buffer
+ * @len: Key Data Length
+ * @ie: Pointer to parsed IE data
+ * Returns: 0 on success, -1 on failure
+ */
+int wpa_parse_kde_ies(const u8 *buf, size_t len, struct wpa_eapol_ie_parse *ie)
+{
+ const u8 *pos, *end;
+ int ret = 0;
+
+ os_memset(ie, 0, sizeof(*ie));
+ for (pos = buf, end = pos + len; pos + 1 < end; pos += 2 + pos[1]) {
+ if (pos[0] == 0xdd &&
+ ((pos == buf + len - 1) || pos[1] == 0)) {
+ /* Ignore padding */
+ break;
+ }
+ if (pos + 2 + pos[1] > end) {
+ wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data "
+ "underflow (ie=%d len=%d pos=%d)",
+ pos[0], pos[1], (int) (pos - buf));
+ wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data",
+ buf, len);
+ ret = -1;
+ break;
+ }
+ if (*pos == WLAN_EID_RSN) {
+ ie->rsn_ie = pos;
+ ie->rsn_ie_len = pos[1] + 2;
+#ifdef CONFIG_IEEE80211R
+ } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) {
+ ie->mdie = pos;
+ ie->mdie_len = pos[1] + 2;
+ } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) {
+ ie->ftie = pos;
+ ie->ftie_len = pos[1] + 2;
+#endif /* CONFIG_IEEE80211R */
+ } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) {
+ ret = wpa_parse_generic(pos, end, ie);
+ if (ret < 0)
+ break;
+ if (ret > 0) {
+ ret = 0;
+ break;
+ }
+ } else {
+ wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key "
+ "Key Data IE", pos, 2 + pos[1]);
+ }
+ }
+
+ return ret;
+}
+
+
+int wpa_auth_uses_mfp(struct wpa_state_machine *sm)
+{
+ return sm ? sm->mgmt_frame_prot : 0;
+}
projects / mech_eap.orig / blobdiff