--- /dev/null
+/*
+ * WPA Supplicant - PeerKey for Direct Link Setup (DLS)
+ * Copyright (c) 2006-2008, 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 "includes.h"
+
+#ifdef CONFIG_PEERKEY
+
+#include "common.h"
+#include "eloop.h"
+#include "crypto/sha1.h"
+#include "crypto/sha256.h"
+#include "common/ieee802_11_defs.h"
+#include "wpa.h"
+#include "wpa_i.h"
+#include "wpa_ie.h"
+#include "peerkey.h"
+
+
+static u8 * wpa_add_ie(u8 *pos, const u8 *ie, size_t ie_len)
+{
+ os_memcpy(pos, ie, ie_len);
+ return pos + ie_len;
+}
+
+
+static u8 * wpa_add_kde(u8 *pos, u32 kde, const u8 *data, size_t data_len)
+{
+ *pos++ = WLAN_EID_VENDOR_SPECIFIC;
+ *pos++ = RSN_SELECTOR_LEN + data_len;
+ RSN_SELECTOR_PUT(pos, kde);
+ pos += RSN_SELECTOR_LEN;
+ os_memcpy(pos, data, data_len);
+ pos += data_len;
+ return pos;
+}
+
+
+static void wpa_supplicant_smk_timeout(void *eloop_ctx, void *timeout_ctx)
+{
+#if 0
+ struct wpa_sm *sm = eloop_ctx;
+ struct wpa_peerkey *peerkey = timeout_ctx;
+#endif
+ /* TODO: time out SMK and any STK that was generated using this SMK */
+}
+
+
+static void wpa_supplicant_peerkey_free(struct wpa_sm *sm,
+ struct wpa_peerkey *peerkey)
+{
+ eloop_cancel_timeout(wpa_supplicant_smk_timeout, sm, peerkey);
+ os_free(peerkey);
+}
+
+
+static int wpa_supplicant_send_smk_error(struct wpa_sm *sm, const u8 *dst,
+ const u8 *peer,
+ u16 mui, u16 error_type, int ver)
+{
+ size_t rlen;
+ struct wpa_eapol_key *err;
+ struct rsn_error_kde error;
+ u8 *rbuf, *pos;
+ size_t kde_len;
+ u16 key_info;
+
+ kde_len = 2 + RSN_SELECTOR_LEN + sizeof(error);
+ if (peer)
+ kde_len += 2 + RSN_SELECTOR_LEN + ETH_ALEN;
+
+ rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY,
+ NULL, sizeof(*err) + kde_len, &rlen,
+ (void *) &err);
+ if (rbuf == NULL)
+ return -1;
+
+ err->type = EAPOL_KEY_TYPE_RSN;
+ key_info = ver | WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_MIC |
+ WPA_KEY_INFO_SECURE | WPA_KEY_INFO_ERROR |
+ WPA_KEY_INFO_REQUEST;
+ WPA_PUT_BE16(err->key_info, key_info);
+ WPA_PUT_BE16(err->key_length, 0);
+ os_memcpy(err->replay_counter, sm->request_counter,
+ WPA_REPLAY_COUNTER_LEN);
+ inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN);
+
+ WPA_PUT_BE16(err->key_data_length, (u16) kde_len);
+ pos = (u8 *) (err + 1);
+
+ if (peer) {
+ /* Peer MAC Address KDE */
+ pos = wpa_add_kde(pos, RSN_KEY_DATA_MAC_ADDR, peer, ETH_ALEN);
+ }
+
+ /* Error KDE */
+ error.mui = host_to_be16(mui);
+ error.error_type = host_to_be16(error_type);
+ wpa_add_kde(pos, RSN_KEY_DATA_ERROR, (u8 *) &error, sizeof(error));
+
+ if (peer) {
+ wpa_printf(MSG_DEBUG, "RSN: Sending EAPOL-Key SMK Error (peer "
+ MACSTR " mui %d error_type %d)",
+ MAC2STR(peer), mui, error_type);
+ } else {
+ wpa_printf(MSG_DEBUG, "RSN: Sending EAPOL-Key SMK Error "
+ "(mui %d error_type %d)", mui, error_type);
+ }
+
+ wpa_eapol_key_send(sm, sm->ptk.kck, ver, dst, ETH_P_EAPOL,
+ rbuf, rlen, err->key_mic);
+
+ return 0;
+}
+
+
+static int wpa_supplicant_send_smk_m3(struct wpa_sm *sm,
+ const unsigned char *src_addr,
+ const struct wpa_eapol_key *key,
+ int ver, struct wpa_peerkey *peerkey)
+{
+ size_t rlen;
+ struct wpa_eapol_key *reply;
+ u8 *rbuf, *pos;
+ size_t kde_len;
+ u16 key_info;
+
+ /* KDEs: Peer RSN IE, Initiator MAC Address, Initiator Nonce */
+ kde_len = peerkey->rsnie_p_len +
+ 2 + RSN_SELECTOR_LEN + ETH_ALEN +
+ 2 + RSN_SELECTOR_LEN + WPA_NONCE_LEN;
+
+ rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY,
+ NULL, sizeof(*reply) + kde_len, &rlen,
+ (void *) &reply);
+ if (rbuf == NULL)
+ return -1;
+
+ reply->type = EAPOL_KEY_TYPE_RSN;
+ key_info = ver | WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_MIC |
+ WPA_KEY_INFO_SECURE;
+ WPA_PUT_BE16(reply->key_info, key_info);
+ WPA_PUT_BE16(reply->key_length, 0);
+ os_memcpy(reply->replay_counter, key->replay_counter,
+ WPA_REPLAY_COUNTER_LEN);
+
+ os_memcpy(reply->key_nonce, peerkey->pnonce, WPA_NONCE_LEN);
+
+ WPA_PUT_BE16(reply->key_data_length, (u16) kde_len);
+ pos = (u8 *) (reply + 1);
+
+ /* Peer RSN IE */
+ pos = wpa_add_ie(pos, peerkey->rsnie_p, peerkey->rsnie_p_len);
+
+ /* Initiator MAC Address KDE */
+ pos = wpa_add_kde(pos, RSN_KEY_DATA_MAC_ADDR, peerkey->addr, ETH_ALEN);
+
+ /* Initiator Nonce */
+ wpa_add_kde(pos, RSN_KEY_DATA_NONCE, peerkey->inonce, WPA_NONCE_LEN);
+
+ wpa_printf(MSG_DEBUG, "RSN: Sending EAPOL-Key SMK M3");
+ wpa_eapol_key_send(sm, sm->ptk.kck, ver, src_addr, ETH_P_EAPOL,
+ rbuf, rlen, reply->key_mic);
+
+ return 0;
+}
+
+
+static int wpa_supplicant_process_smk_m2(
+ struct wpa_sm *sm, const unsigned char *src_addr,
+ const struct wpa_eapol_key *key, size_t extra_len, int ver)
+{
+ struct wpa_peerkey *peerkey;
+ struct wpa_eapol_ie_parse kde;
+ struct wpa_ie_data ie;
+ int cipher;
+ struct rsn_ie_hdr *hdr;
+ u8 *pos;
+
+ wpa_printf(MSG_DEBUG, "RSN: Received SMK M2");
+
+ if (!sm->peerkey_enabled || sm->proto != WPA_PROTO_RSN) {
+ wpa_printf(MSG_INFO, "RSN: SMK handshake not allowed for "
+ "the current network");
+ return -1;
+ }
+
+ if (wpa_supplicant_parse_ies((const u8 *) (key + 1), extra_len, &kde) <
+ 0) {
+ wpa_printf(MSG_INFO, "RSN: Failed to parse KDEs in SMK M2");
+ return -1;
+ }
+
+ if (kde.rsn_ie == NULL || kde.mac_addr == NULL ||
+ kde.mac_addr_len < ETH_ALEN) {
+ wpa_printf(MSG_INFO, "RSN: No RSN IE or MAC address KDE in "
+ "SMK M2");
+ return -1;
+ }
+
+ wpa_printf(MSG_DEBUG, "RSN: SMK M2 - SMK initiator " MACSTR,
+ MAC2STR(kde.mac_addr));
+
+ if (kde.rsn_ie_len > PEERKEY_MAX_IE_LEN) {
+ wpa_printf(MSG_INFO, "RSN: Too long Initiator RSN IE in SMK "
+ "M2");
+ return -1;
+ }
+
+ if (wpa_parse_wpa_ie_rsn(kde.rsn_ie, kde.rsn_ie_len, &ie) < 0) {
+ wpa_printf(MSG_INFO, "RSN: Failed to parse RSN IE in SMK M2");
+ return -1;
+ }
+
+ cipher = ie.pairwise_cipher & sm->allowed_pairwise_cipher;
+ if (cipher & WPA_CIPHER_CCMP) {
+ wpa_printf(MSG_DEBUG, "RSN: Using CCMP for PeerKey");
+ cipher = WPA_CIPHER_CCMP;
+ } else if (cipher & WPA_CIPHER_TKIP) {
+ wpa_printf(MSG_DEBUG, "RSN: Using TKIP for PeerKey");
+ cipher = WPA_CIPHER_TKIP;
+ } else {
+ wpa_printf(MSG_INFO, "RSN: No acceptable cipher in SMK M2");
+ wpa_supplicant_send_smk_error(sm, src_addr, kde.mac_addr,
+ STK_MUI_SMK, STK_ERR_CPHR_NS,
+ ver);
+ return -1;
+ }
+
+ /* TODO: find existing entry and if found, use that instead of adding
+ * a new one; how to handle the case where both ends initiate at the
+ * same time? */
+ peerkey = os_zalloc(sizeof(*peerkey));
+ if (peerkey == NULL)
+ return -1;
+ os_memcpy(peerkey->addr, kde.mac_addr, ETH_ALEN);
+ os_memcpy(peerkey->inonce, key->key_nonce, WPA_NONCE_LEN);
+ os_memcpy(peerkey->rsnie_i, kde.rsn_ie, kde.rsn_ie_len);
+ peerkey->rsnie_i_len = kde.rsn_ie_len;
+ peerkey->cipher = cipher;
+#ifdef CONFIG_IEEE80211W
+ if (ie.key_mgmt & (WPA_KEY_MGMT_IEEE8021X_SHA256 |
+ WPA_KEY_MGMT_PSK_SHA256))
+ peerkey->use_sha256 = 1;
+#endif /* CONFIG_IEEE80211W */
+
+ if (os_get_random(peerkey->pnonce, WPA_NONCE_LEN)) {
+ wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
+ "WPA: Failed to get random data for PNonce");
+ wpa_supplicant_peerkey_free(sm, peerkey);
+ return -1;
+ }
+
+ hdr = (struct rsn_ie_hdr *) peerkey->rsnie_p;
+ hdr->elem_id = WLAN_EID_RSN;
+ WPA_PUT_LE16(hdr->version, RSN_VERSION);
+ pos = (u8 *) (hdr + 1);
+ /* Group Suite can be anything for SMK RSN IE; receiver will just
+ * ignore it. */
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
+ pos += RSN_SELECTOR_LEN;
+ /* Include only the selected cipher in pairwise cipher suite */
+ WPA_PUT_LE16(pos, 1);
+ pos += 2;
+ if (cipher == WPA_CIPHER_CCMP)
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
+ else if (cipher == WPA_CIPHER_TKIP)
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
+ pos += RSN_SELECTOR_LEN;
+
+ hdr->len = (pos - peerkey->rsnie_p) - 2;
+ peerkey->rsnie_p_len = pos - peerkey->rsnie_p;
+ wpa_hexdump(MSG_DEBUG, "WPA: RSN IE for SMK handshake",
+ peerkey->rsnie_p, peerkey->rsnie_p_len);
+
+ wpa_supplicant_send_smk_m3(sm, src_addr, key, ver, peerkey);
+
+ peerkey->next = sm->peerkey;
+ sm->peerkey = peerkey;
+
+ return 0;
+}
+
+
+/**
+ * rsn_smkid - Derive SMK identifier
+ * @smk: Station master key (32 bytes)
+ * @pnonce: Peer Nonce
+ * @mac_p: Peer MAC address
+ * @inonce: Initiator Nonce
+ * @mac_i: Initiator MAC address
+ * @use_sha256: Whether to use SHA256-based KDF
+ *
+ * 8.5.1.4 Station to station (STK) key hierarchy
+ * SMKID = HMAC-SHA1-128(SMK, "SMK Name" || PNonce || MAC_P || INonce || MAC_I)
+ */
+static void rsn_smkid(const u8 *smk, const u8 *pnonce, const u8 *mac_p,
+ const u8 *inonce, const u8 *mac_i, u8 *smkid,
+ int use_sha256)
+{
+ char *title = "SMK Name";
+ const u8 *addr[5];
+ const size_t len[5] = { 8, WPA_NONCE_LEN, ETH_ALEN, WPA_NONCE_LEN,
+ ETH_ALEN };
+ unsigned char hash[SHA256_MAC_LEN];
+
+ addr[0] = (u8 *) title;
+ addr[1] = pnonce;
+ addr[2] = mac_p;
+ addr[3] = inonce;
+ addr[4] = mac_i;
+
+#ifdef CONFIG_IEEE80211W
+ if (use_sha256)
+ hmac_sha256_vector(smk, PMK_LEN, 5, addr, len, hash);
+ else
+#endif /* CONFIG_IEEE80211W */
+ hmac_sha1_vector(smk, PMK_LEN, 5, addr, len, hash);
+ os_memcpy(smkid, hash, PMKID_LEN);
+}
+
+
+static void wpa_supplicant_send_stk_1_of_4(struct wpa_sm *sm,
+ struct wpa_peerkey *peerkey)
+{
+ size_t mlen;
+ struct wpa_eapol_key *msg;
+ u8 *mbuf;
+ size_t kde_len;
+ u16 key_info, ver;
+
+ kde_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
+
+ mbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
+ sizeof(*msg) + kde_len, &mlen,
+ (void *) &msg);
+ if (mbuf == NULL)
+ return;
+
+ msg->type = EAPOL_KEY_TYPE_RSN;
+
+ if (peerkey->cipher == WPA_CIPHER_CCMP)
+ ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
+ else
+ ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
+
+ key_info = ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_ACK;
+ WPA_PUT_BE16(msg->key_info, key_info);
+
+ if (peerkey->cipher == WPA_CIPHER_CCMP)
+ WPA_PUT_BE16(msg->key_length, 16);
+ else
+ WPA_PUT_BE16(msg->key_length, 32);
+
+ os_memcpy(msg->replay_counter, peerkey->replay_counter,
+ WPA_REPLAY_COUNTER_LEN);
+ inc_byte_array(peerkey->replay_counter, WPA_REPLAY_COUNTER_LEN);
+
+ WPA_PUT_BE16(msg->key_data_length, kde_len);
+ wpa_add_kde((u8 *) (msg + 1), RSN_KEY_DATA_PMKID,
+ peerkey->smkid, PMKID_LEN);
+
+ if (os_get_random(peerkey->inonce, WPA_NONCE_LEN)) {
+ wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
+ "RSN: Failed to get random data for INonce (STK)");
+ os_free(mbuf);
+ return;
+ }
+ wpa_hexdump(MSG_DEBUG, "RSN: INonce for STK 4-Way Handshake",
+ peerkey->inonce, WPA_NONCE_LEN);
+ os_memcpy(msg->key_nonce, peerkey->inonce, WPA_NONCE_LEN);
+
+ wpa_printf(MSG_DEBUG, "RSN: Sending EAPOL-Key STK 1/4 to " MACSTR,
+ MAC2STR(peerkey->addr));
+ wpa_eapol_key_send(sm, NULL, ver, peerkey->addr, ETH_P_EAPOL,
+ mbuf, mlen, NULL);
+}
+
+
+static void wpa_supplicant_send_stk_3_of_4(struct wpa_sm *sm,
+ struct wpa_peerkey *peerkey)
+{
+ size_t mlen;
+ struct wpa_eapol_key *msg;
+ u8 *mbuf, *pos;
+ size_t kde_len;
+ u16 key_info, ver;
+ be32 lifetime;
+
+ kde_len = peerkey->rsnie_i_len +
+ 2 + RSN_SELECTOR_LEN + sizeof(lifetime);
+
+ mbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
+ sizeof(*msg) + kde_len, &mlen,
+ (void *) &msg);
+ if (mbuf == NULL)
+ return;
+
+ msg->type = EAPOL_KEY_TYPE_RSN;
+
+ if (peerkey->cipher == WPA_CIPHER_CCMP)
+ ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
+ else
+ ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
+
+ key_info = ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_ACK |
+ WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE;
+ WPA_PUT_BE16(msg->key_info, key_info);
+
+ if (peerkey->cipher == WPA_CIPHER_CCMP)
+ WPA_PUT_BE16(msg->key_length, 16);
+ else
+ WPA_PUT_BE16(msg->key_length, 32);
+
+ os_memcpy(msg->replay_counter, peerkey->replay_counter,
+ WPA_REPLAY_COUNTER_LEN);
+ inc_byte_array(peerkey->replay_counter, WPA_REPLAY_COUNTER_LEN);
+
+ WPA_PUT_BE16(msg->key_data_length, kde_len);
+ pos = (u8 *) (msg + 1);
+ pos = wpa_add_ie(pos, peerkey->rsnie_i, peerkey->rsnie_i_len);
+ lifetime = host_to_be32(peerkey->lifetime);
+ wpa_add_kde(pos, RSN_KEY_DATA_LIFETIME,
+ (u8 *) &lifetime, sizeof(lifetime));
+
+ os_memcpy(msg->key_nonce, peerkey->inonce, WPA_NONCE_LEN);
+
+ wpa_printf(MSG_DEBUG, "RSN: Sending EAPOL-Key STK 3/4 to " MACSTR,
+ MAC2STR(peerkey->addr));
+ wpa_eapol_key_send(sm, peerkey->stk.kck, ver, peerkey->addr,
+ ETH_P_EAPOL, mbuf, mlen, msg->key_mic);
+}
+
+
+static int wpa_supplicant_process_smk_m4(struct wpa_peerkey *peerkey,
+ struct wpa_eapol_ie_parse *kde)
+{
+ wpa_printf(MSG_DEBUG, "RSN: Received SMK M4 (Initiator " MACSTR ")",
+ MAC2STR(kde->mac_addr));
+
+ if (os_memcmp(kde->smk + PMK_LEN, peerkey->pnonce, WPA_NONCE_LEN) != 0)
+ {
+ wpa_printf(MSG_INFO, "RSN: PNonce in SMK KDE does not "
+ "match with the one used in SMK M3");
+ return -1;
+ }
+
+ if (os_memcmp(kde->nonce, peerkey->inonce, WPA_NONCE_LEN) != 0) {
+ wpa_printf(MSG_INFO, "RSN: INonce in SMK M4 did not "
+ "match with the one received in SMK M2");
+ return -1;
+ }
+
+ return 0;
+}
+
+
+static int wpa_supplicant_process_smk_m5(struct wpa_sm *sm,
+ const unsigned char *src_addr,
+ const struct wpa_eapol_key *key,
+ int ver,
+ struct wpa_peerkey *peerkey,
+ struct wpa_eapol_ie_parse *kde)
+{
+ int cipher;
+ struct wpa_ie_data ie;
+
+ wpa_printf(MSG_DEBUG, "RSN: Received SMK M5 (Peer " MACSTR ")",
+ MAC2STR(kde->mac_addr));
+ if (kde->rsn_ie == NULL || kde->rsn_ie_len > PEERKEY_MAX_IE_LEN ||
+ wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0) {
+ wpa_printf(MSG_INFO, "RSN: No RSN IE in SMK M5");
+ /* TODO: abort negotiation */
+ return -1;
+ }
+
+ if (os_memcmp(key->key_nonce, peerkey->inonce, WPA_NONCE_LEN) != 0) {
+ wpa_printf(MSG_INFO, "RSN: Key Nonce in SMK M5 does "
+ "not match with INonce used in SMK M1");
+ return -1;
+ }
+
+ if (os_memcmp(kde->smk + PMK_LEN, peerkey->inonce, WPA_NONCE_LEN) != 0)
+ {
+ wpa_printf(MSG_INFO, "RSN: INonce in SMK KDE does not "
+ "match with the one used in SMK M1");
+ return -1;
+ }
+
+ os_memcpy(peerkey->rsnie_p, kde->rsn_ie, kde->rsn_ie_len);
+ peerkey->rsnie_p_len = kde->rsn_ie_len;
+ os_memcpy(peerkey->pnonce, kde->nonce, WPA_NONCE_LEN);
+
+ cipher = ie.pairwise_cipher & sm->allowed_pairwise_cipher;
+ if (cipher & WPA_CIPHER_CCMP) {
+ wpa_printf(MSG_DEBUG, "RSN: Using CCMP for PeerKey");
+ peerkey->cipher = WPA_CIPHER_CCMP;
+ } else if (cipher & WPA_CIPHER_TKIP) {
+ wpa_printf(MSG_DEBUG, "RSN: Using TKIP for PeerKey");
+ peerkey->cipher = WPA_CIPHER_TKIP;
+ } else {
+ wpa_printf(MSG_INFO, "RSN: SMK Peer STA " MACSTR " selected "
+ "unacceptable cipher", MAC2STR(kde->mac_addr));
+ wpa_supplicant_send_smk_error(sm, src_addr, kde->mac_addr,
+ STK_MUI_SMK, STK_ERR_CPHR_NS,
+ ver);
+ /* TODO: abort negotiation */
+ return -1;
+ }
+
+ return 0;
+}
+
+
+static int wpa_supplicant_process_smk_m45(
+ struct wpa_sm *sm, const unsigned char *src_addr,
+ const struct wpa_eapol_key *key, size_t extra_len, int ver)
+{
+ struct wpa_peerkey *peerkey;
+ struct wpa_eapol_ie_parse kde;
+ u32 lifetime;
+ struct os_time now;
+
+ if (!sm->peerkey_enabled || sm->proto != WPA_PROTO_RSN) {
+ wpa_printf(MSG_DEBUG, "RSN: SMK handshake not allowed for "
+ "the current network");
+ return -1;
+ }
+
+ if (wpa_supplicant_parse_ies((const u8 *) (key + 1), extra_len, &kde) <
+ 0) {
+ wpa_printf(MSG_INFO, "RSN: Failed to parse KDEs in SMK M4/M5");
+ return -1;
+ }
+
+ if (kde.mac_addr == NULL || kde.mac_addr_len < ETH_ALEN ||
+ kde.nonce == NULL || kde.nonce_len < WPA_NONCE_LEN ||
+ kde.smk == NULL || kde.smk_len < PMK_LEN + WPA_NONCE_LEN ||
+ kde.lifetime == NULL || kde.lifetime_len < 4) {
+ wpa_printf(MSG_INFO, "RSN: No MAC Address, Nonce, SMK, or "
+ "Lifetime KDE in SMK M4/M5");
+ return -1;
+ }
+
+ for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) {
+ if (os_memcmp(peerkey->addr, kde.mac_addr, ETH_ALEN) == 0 &&
+ os_memcmp(peerkey->initiator ? peerkey->inonce :
+ peerkey->pnonce,
+ key->key_nonce, WPA_NONCE_LEN) == 0)
+ break;
+ }
+ if (peerkey == NULL) {
+ wpa_printf(MSG_INFO, "RSN: No matching SMK handshake found "
+ "for SMK M4/M5: peer " MACSTR,
+ MAC2STR(kde.mac_addr));
+ return -1;
+ }
+
+ if (peerkey->initiator) {
+ if (wpa_supplicant_process_smk_m5(sm, src_addr, key, ver,
+ peerkey, &kde) < 0)
+ return -1;
+ } else {
+ if (wpa_supplicant_process_smk_m4(peerkey, &kde) < 0)
+ return -1;
+ }
+
+ os_memcpy(peerkey->smk, kde.smk, PMK_LEN);
+ peerkey->smk_complete = 1;
+ wpa_hexdump_key(MSG_DEBUG, "RSN: SMK", peerkey->smk, PMK_LEN);
+ lifetime = WPA_GET_BE32(kde.lifetime);
+ wpa_printf(MSG_DEBUG, "RSN: SMK lifetime %u seconds", lifetime);
+ if (lifetime > 1000000000)
+ lifetime = 1000000000; /* avoid overflowing expiration time */
+ peerkey->lifetime = lifetime;
+ os_get_time(&now);
+ peerkey->expiration = now.sec + lifetime;
+ eloop_register_timeout(lifetime, 0, wpa_supplicant_smk_timeout,
+ sm, peerkey);
+
+ if (peerkey->initiator) {
+ rsn_smkid(peerkey->smk, peerkey->pnonce, peerkey->addr,
+ peerkey->inonce, sm->own_addr, peerkey->smkid,
+ peerkey->use_sha256);
+ wpa_supplicant_send_stk_1_of_4(sm, peerkey);
+ } else {
+ rsn_smkid(peerkey->smk, peerkey->pnonce, sm->own_addr,
+ peerkey->inonce, peerkey->addr, peerkey->smkid,
+ peerkey->use_sha256);
+ }
+ wpa_hexdump(MSG_DEBUG, "RSN: SMKID", peerkey->smkid, PMKID_LEN);
+
+ return 0;
+}
+
+
+static int wpa_supplicant_process_smk_error(
+ struct wpa_sm *sm, const unsigned char *src_addr,
+ const struct wpa_eapol_key *key, size_t extra_len)
+{
+ struct wpa_eapol_ie_parse kde;
+ struct rsn_error_kde error;
+ u8 peer[ETH_ALEN];
+ u16 error_type;
+
+ wpa_printf(MSG_DEBUG, "RSN: Received SMK Error");
+
+ if (!sm->peerkey_enabled || sm->proto != WPA_PROTO_RSN) {
+ wpa_printf(MSG_DEBUG, "RSN: SMK handshake not allowed for "
+ "the current network");
+ return -1;
+ }
+
+ if (wpa_supplicant_parse_ies((const u8 *) (key + 1), extra_len, &kde) <
+ 0) {
+ wpa_printf(MSG_INFO, "RSN: Failed to parse KDEs in SMK Error");
+ return -1;
+ }
+
+ if (kde.error == NULL || kde.error_len < sizeof(error)) {
+ wpa_printf(MSG_INFO, "RSN: No Error KDE in SMK Error");
+ return -1;
+ }
+
+ if (kde.mac_addr && kde.mac_addr_len >= ETH_ALEN)
+ os_memcpy(peer, kde.mac_addr, ETH_ALEN);
+ else
+ os_memset(peer, 0, ETH_ALEN);
+ os_memcpy(&error, kde.error, sizeof(error));
+ error_type = be_to_host16(error.error_type);
+ wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
+ "RSN: SMK Error KDE received: MUI %d error_type %d peer "
+ MACSTR,
+ be_to_host16(error.mui), error_type,
+ MAC2STR(peer));
+
+ if (kde.mac_addr &&
+ (error_type == STK_ERR_STA_NR || error_type == STK_ERR_STA_NRSN ||
+ error_type == STK_ERR_CPHR_NS)) {
+ struct wpa_peerkey *peerkey;
+
+ for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) {
+ if (os_memcmp(peerkey->addr, kde.mac_addr, ETH_ALEN) ==
+ 0)
+ break;
+ }
+ if (peerkey == NULL) {
+ wpa_printf(MSG_DEBUG, "RSN: No matching SMK handshake "
+ "found for SMK Error");
+ return -1;
+ }
+ /* TODO: abort SMK/STK handshake and remove all related keys */
+ }
+
+ return 0;
+}
+
+
+static void wpa_supplicant_process_stk_1_of_4(struct wpa_sm *sm,
+ struct wpa_peerkey *peerkey,
+ const struct wpa_eapol_key *key,
+ u16 ver)
+{
+ struct wpa_eapol_ie_parse ie;
+ const u8 *kde;
+ size_t len, kde_buf_len;
+ struct wpa_ptk *stk;
+ u8 buf[8], *kde_buf, *pos;
+ be32 lifetime;
+
+ wpa_printf(MSG_DEBUG, "RSN: RX message 1 of STK 4-Way Handshake from "
+ MACSTR " (ver=%d)", MAC2STR(peerkey->addr), ver);
+
+ os_memset(&ie, 0, sizeof(ie));
+
+ /* RSN: msg 1/4 should contain SMKID for the selected SMK */
+ kde = (const u8 *) (key + 1);
+ len = WPA_GET_BE16(key->key_data_length);
+ wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", kde, len);
+ if (wpa_supplicant_parse_ies(kde, len, &ie) < 0 || ie.pmkid == NULL) {
+ wpa_printf(MSG_DEBUG, "RSN: No SMKID in STK 1/4");
+ return;
+ }
+ if (os_memcmp(ie.pmkid, peerkey->smkid, PMKID_LEN) != 0) {
+ wpa_hexdump(MSG_DEBUG, "RSN: Unknown SMKID in STK 1/4",
+ ie.pmkid, PMKID_LEN);
+ return;
+ }
+
+ if (os_get_random(peerkey->pnonce, WPA_NONCE_LEN)) {
+ wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
+ "RSN: Failed to get random data for PNonce");
+ return;
+ }
+ wpa_hexdump(MSG_DEBUG, "WPA: Renewed PNonce",
+ peerkey->pnonce, WPA_NONCE_LEN);
+
+ /* Calculate STK which will be stored as a temporary STK until it has
+ * been verified when processing message 3/4. */
+ stk = &peerkey->tstk;
+ wpa_pmk_to_ptk(peerkey->smk, PMK_LEN, "Peer key expansion",
+ sm->own_addr, peerkey->addr,
+ peerkey->pnonce, key->key_nonce,
+ (u8 *) stk, sizeof(*stk),
+ peerkey->use_sha256);
+ /* Supplicant: swap tx/rx Mic keys */
+ os_memcpy(buf, stk->u.auth.tx_mic_key, 8);
+ os_memcpy(stk->u.auth.tx_mic_key, stk->u.auth.rx_mic_key, 8);
+ os_memcpy(stk->u.auth.rx_mic_key, buf, 8);
+ peerkey->tstk_set = 1;
+
+ kde_buf_len = peerkey->rsnie_p_len +
+ 2 + RSN_SELECTOR_LEN + sizeof(lifetime) +
+ 2 + RSN_SELECTOR_LEN + PMKID_LEN;
+ kde_buf = os_malloc(kde_buf_len);
+ if (kde_buf == NULL)
+ return;
+ pos = kde_buf;
+ pos = wpa_add_ie(pos, peerkey->rsnie_p, peerkey->rsnie_p_len);
+ lifetime = host_to_be32(peerkey->lifetime);
+ pos = wpa_add_kde(pos, RSN_KEY_DATA_LIFETIME,
+ (u8 *) &lifetime, sizeof(lifetime));
+ wpa_add_kde(pos, RSN_KEY_DATA_PMKID, peerkey->smkid, PMKID_LEN);
+
+ if (wpa_supplicant_send_2_of_4(sm, peerkey->addr, key, ver,
+ peerkey->pnonce, kde_buf, kde_buf_len,
+ stk)) {
+ os_free(kde_buf);
+ return;
+ }
+ os_free(kde_buf);
+
+ os_memcpy(peerkey->inonce, key->key_nonce, WPA_NONCE_LEN);
+}
+
+
+static void wpa_supplicant_update_smk_lifetime(struct wpa_sm *sm,
+ struct wpa_peerkey *peerkey,
+ struct wpa_eapol_ie_parse *kde)
+{
+ u32 lifetime;
+ struct os_time now;
+
+ if (kde->lifetime == NULL || kde->lifetime_len < sizeof(lifetime))
+ return;
+
+ lifetime = WPA_GET_BE32(kde->lifetime);
+
+ if (lifetime >= peerkey->lifetime) {
+ wpa_printf(MSG_DEBUG, "RSN: Peer used SMK lifetime %u seconds "
+ "which is larger than or equal to own value %u "
+ "seconds - ignored", lifetime, peerkey->lifetime);
+ return;
+ }
+
+ wpa_printf(MSG_DEBUG, "RSN: Peer used shorter SMK lifetime %u seconds "
+ "(own was %u seconds) - updated",
+ lifetime, peerkey->lifetime);
+ peerkey->lifetime = lifetime;
+
+ os_get_time(&now);
+ peerkey->expiration = now.sec + lifetime;
+ eloop_cancel_timeout(wpa_supplicant_smk_timeout, sm, peerkey);
+ eloop_register_timeout(lifetime, 0, wpa_supplicant_smk_timeout,
+ sm, peerkey);
+}
+
+
+static void wpa_supplicant_process_stk_2_of_4(struct wpa_sm *sm,
+ struct wpa_peerkey *peerkey,
+ const struct wpa_eapol_key *key,
+ u16 ver)
+{
+ struct wpa_eapol_ie_parse kde;
+ const u8 *keydata;
+ size_t len;
+
+ wpa_printf(MSG_DEBUG, "RSN: RX message 2 of STK 4-Way Handshake from "
+ MACSTR " (ver=%d)", MAC2STR(peerkey->addr), ver);
+
+ os_memset(&kde, 0, sizeof(kde));
+
+ /* RSN: msg 2/4 should contain SMKID for the selected SMK and RSN IE
+ * from the peer. It may also include Lifetime KDE. */
+ keydata = (const u8 *) (key + 1);
+ len = WPA_GET_BE16(key->key_data_length);
+ wpa_hexdump(MSG_DEBUG, "RSN: msg 2/4 key data", keydata, len);
+ if (wpa_supplicant_parse_ies(keydata, len, &kde) < 0 ||
+ kde.pmkid == NULL || kde.rsn_ie == NULL) {
+ wpa_printf(MSG_DEBUG, "RSN: No SMKID or RSN IE in STK 2/4");
+ return;
+ }
+
+ if (os_memcmp(kde.pmkid, peerkey->smkid, PMKID_LEN) != 0) {
+ wpa_hexdump(MSG_DEBUG, "RSN: Unknown SMKID in STK 2/4",
+ kde.pmkid, PMKID_LEN);
+ return;
+ }
+
+ if (kde.rsn_ie_len != peerkey->rsnie_p_len ||
+ os_memcmp(kde.rsn_ie, peerkey->rsnie_p, kde.rsn_ie_len) != 0) {
+ wpa_printf(MSG_INFO, "RSN: Peer RSN IE in SMK and STK "
+ "handshakes did not match");
+ wpa_hexdump(MSG_DEBUG, "RSN: Peer RSN IE in SMK handshake",
+ peerkey->rsnie_p, peerkey->rsnie_p_len);
+ wpa_hexdump(MSG_DEBUG, "RSN: Peer RSN IE in STK handshake",
+ kde.rsn_ie, kde.rsn_ie_len);
+ return;
+ }
+
+ wpa_supplicant_update_smk_lifetime(sm, peerkey, &kde);
+
+ wpa_supplicant_send_stk_3_of_4(sm, peerkey);
+ os_memcpy(peerkey->pnonce, key->key_nonce, WPA_NONCE_LEN);
+}
+
+
+static void wpa_supplicant_process_stk_3_of_4(struct wpa_sm *sm,
+ struct wpa_peerkey *peerkey,
+ const struct wpa_eapol_key *key,
+ u16 ver)
+{
+ struct wpa_eapol_ie_parse kde;
+ const u8 *keydata;
+ size_t len, key_len;
+ const u8 *_key;
+ u8 key_buf[32], rsc[6];
+
+ wpa_printf(MSG_DEBUG, "RSN: RX message 3 of STK 4-Way Handshake from "
+ MACSTR " (ver=%d)", MAC2STR(peerkey->addr), ver);
+
+ os_memset(&kde, 0, sizeof(kde));
+
+ /* RSN: msg 3/4 should contain Initiator RSN IE. It may also include
+ * Lifetime KDE. */
+ keydata = (const u8 *) (key + 1);
+ len = WPA_GET_BE16(key->key_data_length);
+ wpa_hexdump(MSG_DEBUG, "RSN: msg 3/4 key data", keydata, len);
+ if (wpa_supplicant_parse_ies(keydata, len, &kde) < 0) {
+ wpa_printf(MSG_DEBUG, "RSN: Failed to parse key data in "
+ "STK 3/4");
+ return;
+ }
+
+ if (kde.rsn_ie_len != peerkey->rsnie_i_len ||
+ os_memcmp(kde.rsn_ie, peerkey->rsnie_i, kde.rsn_ie_len) != 0) {
+ wpa_printf(MSG_INFO, "RSN: Initiator RSN IE in SMK and STK "
+ "handshakes did not match");
+ wpa_hexdump(MSG_DEBUG, "RSN: Initiator RSN IE in SMK "
+ "handshake",
+ peerkey->rsnie_i, peerkey->rsnie_i_len);
+ wpa_hexdump(MSG_DEBUG, "RSN: Initiator RSN IE in STK "
+ "handshake",
+ kde.rsn_ie, kde.rsn_ie_len);
+ return;
+ }
+
+ if (os_memcmp(peerkey->inonce, key->key_nonce, WPA_NONCE_LEN) != 0) {
+ wpa_printf(MSG_WARNING, "RSN: INonce from message 1 of STK "
+ "4-Way Handshake differs from 3 of STK 4-Way "
+ "Handshake - drop packet (src=" MACSTR ")",
+ MAC2STR(peerkey->addr));
+ return;
+ }
+
+ wpa_supplicant_update_smk_lifetime(sm, peerkey, &kde);
+
+ if (wpa_supplicant_send_4_of_4(sm, peerkey->addr, key, ver,
+ WPA_GET_BE16(key->key_info),
+ NULL, 0, &peerkey->stk))
+ return;
+
+ _key = (u8 *) peerkey->stk.tk1;
+ if (peerkey->cipher == WPA_CIPHER_TKIP) {
+ /* Swap Tx/Rx keys for Michael MIC */
+ os_memcpy(key_buf, _key, 16);
+ os_memcpy(key_buf + 16, peerkey->stk.u.auth.rx_mic_key, 8);
+ os_memcpy(key_buf + 24, peerkey->stk.u.auth.tx_mic_key, 8);
+ _key = key_buf;
+ key_len = 32;
+ } else
+ key_len = 16;
+
+ os_memset(rsc, 0, 6);
+ if (wpa_sm_set_key(sm, peerkey->cipher, peerkey->addr, 0, 1,
+ rsc, sizeof(rsc), _key, key_len) < 0) {
+ wpa_printf(MSG_WARNING, "RSN: Failed to set STK to the "
+ "driver.");
+ return;
+ }
+}
+
+
+static void wpa_supplicant_process_stk_4_of_4(struct wpa_sm *sm,
+ struct wpa_peerkey *peerkey,
+ const struct wpa_eapol_key *key,
+ u16 ver)
+{
+ u8 rsc[6];
+
+ wpa_printf(MSG_DEBUG, "RSN: RX message 4 of STK 4-Way Handshake from "
+ MACSTR " (ver=%d)", MAC2STR(peerkey->addr), ver);
+
+ os_memset(rsc, 0, 6);
+ if (wpa_sm_set_key(sm, peerkey->cipher, peerkey->addr, 0, 1,
+ rsc, sizeof(rsc), (u8 *) peerkey->stk.tk1,
+ peerkey->cipher == WPA_CIPHER_TKIP ? 32 : 16) < 0) {
+ wpa_printf(MSG_WARNING, "RSN: Failed to set STK to the "
+ "driver.");
+ return;
+ }
+}
+
+
+/**
+ * peerkey_verify_eapol_key_mic - Verify PeerKey MIC
+ * @sm: Pointer to WPA state machine data from wpa_sm_init()
+ * @peerkey: Pointer to the PeerKey data for the peer
+ * @key: Pointer to the EAPOL-Key frame header
+ * @ver: Version bits from EAPOL-Key Key Info
+ * @buf: Pointer to the beginning of EAPOL-Key frame
+ * @len: Length of the EAPOL-Key frame
+ * Returns: 0 on success, -1 on failure
+ */
+int peerkey_verify_eapol_key_mic(struct wpa_sm *sm,
+ struct wpa_peerkey *peerkey,
+ struct wpa_eapol_key *key, u16 ver,
+ const u8 *buf, size_t len)
+{
+ u8 mic[16];
+ int ok = 0;
+
+ if (peerkey->initiator && !peerkey->stk_set) {
+ wpa_pmk_to_ptk(peerkey->smk, PMK_LEN, "Peer key expansion",
+ sm->own_addr, peerkey->addr,
+ peerkey->inonce, key->key_nonce,
+ (u8 *) &peerkey->stk, sizeof(peerkey->stk),
+ peerkey->use_sha256);
+ peerkey->stk_set = 1;
+ }
+
+ os_memcpy(mic, key->key_mic, 16);
+ if (peerkey->tstk_set) {
+ os_memset(key->key_mic, 0, 16);
+ wpa_eapol_key_mic(peerkey->tstk.kck, ver, buf, len,
+ key->key_mic);
+ if (os_memcmp(mic, key->key_mic, 16) != 0) {
+ wpa_printf(MSG_WARNING, "RSN: Invalid EAPOL-Key MIC "
+ "when using TSTK - ignoring TSTK");
+ } else {
+ ok = 1;
+ peerkey->tstk_set = 0;
+ peerkey->stk_set = 1;
+ os_memcpy(&peerkey->stk, &peerkey->tstk,
+ sizeof(peerkey->stk));
+ }
+ }
+
+ if (!ok && peerkey->stk_set) {
+ os_memset(key->key_mic, 0, 16);
+ wpa_eapol_key_mic(peerkey->stk.kck, ver, buf, len,
+ key->key_mic);
+ if (os_memcmp(mic, key->key_mic, 16) != 0) {
+ wpa_printf(MSG_WARNING, "RSN: Invalid EAPOL-Key MIC "
+ "- dropping packet");
+ return -1;
+ }
+ ok = 1;
+ }
+
+ if (!ok) {
+ wpa_printf(MSG_WARNING, "RSN: Could not verify EAPOL-Key MIC "
+ "- dropping packet");
+ return -1;
+ }
+
+ os_memcpy(peerkey->replay_counter, key->replay_counter,
+ WPA_REPLAY_COUNTER_LEN);
+ peerkey->replay_counter_set = 1;
+ return 0;
+}
+
+
+/**
+ * wpa_sm_stkstart - Send EAPOL-Key Request for STK handshake (STK M1)
+ * @sm: Pointer to WPA state machine data from wpa_sm_init()
+ * @peer: MAC address of the peer STA
+ * Returns: 0 on success, or -1 on failure
+ *
+ * Send an EAPOL-Key Request to the current authenticator to start STK
+ * handshake with the peer.
+ */
+int wpa_sm_stkstart(struct wpa_sm *sm, const u8 *peer)
+{
+ size_t rlen, kde_len;
+ struct wpa_eapol_key *req;
+ int key_info, ver;
+ u8 bssid[ETH_ALEN], *rbuf, *pos, *count_pos;
+ u16 count;
+ struct rsn_ie_hdr *hdr;
+ struct wpa_peerkey *peerkey;
+ struct wpa_ie_data ie;
+
+ if (sm->proto != WPA_PROTO_RSN || !sm->ptk_set || !sm->peerkey_enabled)
+ return -1;
+
+ if (sm->ap_rsn_ie &&
+ wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &ie) == 0 &&
+ !(ie.capabilities & WPA_CAPABILITY_PEERKEY_ENABLED)) {
+ wpa_printf(MSG_DEBUG, "RSN: Current AP does not support STK");
+ return -1;
+ }
+
+ if (sm->pairwise_cipher == WPA_CIPHER_CCMP)
+ ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
+ else
+ ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
+
+ if (wpa_sm_get_bssid(sm, bssid) < 0) {
+ wpa_printf(MSG_WARNING, "Failed to read BSSID for EAPOL-Key "
+ "SMK M1");
+ return -1;
+ }
+
+ /* TODO: find existing entry and if found, use that instead of adding
+ * a new one */
+ peerkey = os_zalloc(sizeof(*peerkey));
+ if (peerkey == NULL)
+ return -1;
+ peerkey->initiator = 1;
+ os_memcpy(peerkey->addr, peer, ETH_ALEN);
+#ifdef CONFIG_IEEE80211W
+ if (wpa_key_mgmt_sha256(sm->key_mgmt))
+ peerkey->use_sha256 = 1;
+#endif /* CONFIG_IEEE80211W */
+
+ /* SMK M1:
+ * EAPOL-Key(S=1, M=1, A=0, I=0, K=0, SM=1, KeyRSC=0, Nonce=INonce,
+ * MIC=MIC, DataKDs=(RSNIE_I, MAC_P KDE))
+ */
+
+ hdr = (struct rsn_ie_hdr *) peerkey->rsnie_i;
+ hdr->elem_id = WLAN_EID_RSN;
+ WPA_PUT_LE16(hdr->version, RSN_VERSION);
+ pos = (u8 *) (hdr + 1);
+ /* Group Suite can be anything for SMK RSN IE; receiver will just
+ * ignore it. */
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
+ pos += RSN_SELECTOR_LEN;
+ count_pos = pos;
+ pos += 2;
+
+ count = 0;
+ if (sm->allowed_pairwise_cipher & WPA_CIPHER_CCMP) {
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
+ pos += RSN_SELECTOR_LEN;
+ count++;
+ }
+ if (sm->allowed_pairwise_cipher & WPA_CIPHER_TKIP) {
+ RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
+ pos += RSN_SELECTOR_LEN;
+ count++;
+ }
+ WPA_PUT_LE16(count_pos, count);
+
+ hdr->len = (pos - peerkey->rsnie_i) - 2;
+ peerkey->rsnie_i_len = pos - peerkey->rsnie_i;
+ wpa_hexdump(MSG_DEBUG, "WPA: RSN IE for SMK handshake",
+ peerkey->rsnie_i, peerkey->rsnie_i_len);
+
+ kde_len = peerkey->rsnie_i_len + 2 + RSN_SELECTOR_LEN + ETH_ALEN;
+
+ rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
+ sizeof(*req) + kde_len, &rlen,
+ (void *) &req);
+ if (rbuf == NULL) {
+ wpa_supplicant_peerkey_free(sm, peerkey);
+ return -1;
+ }
+
+ req->type = EAPOL_KEY_TYPE_RSN;
+ key_info = WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_MIC |
+ WPA_KEY_INFO_SECURE | WPA_KEY_INFO_REQUEST | ver;
+ WPA_PUT_BE16(req->key_info, key_info);
+ WPA_PUT_BE16(req->key_length, 0);
+ os_memcpy(req->replay_counter, sm->request_counter,
+ WPA_REPLAY_COUNTER_LEN);
+ inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN);
+
+ if (os_get_random(peerkey->inonce, WPA_NONCE_LEN)) {
+ wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
+ "WPA: Failed to get random data for INonce");
+ os_free(rbuf);
+ wpa_supplicant_peerkey_free(sm, peerkey);
+ return -1;
+ }
+ os_memcpy(req->key_nonce, peerkey->inonce, WPA_NONCE_LEN);
+ wpa_hexdump(MSG_DEBUG, "WPA: INonce for SMK handshake",
+ req->key_nonce, WPA_NONCE_LEN);
+
+ WPA_PUT_BE16(req->key_data_length, (u16) kde_len);
+ pos = (u8 *) (req + 1);
+
+ /* Initiator RSN IE */
+ pos = wpa_add_ie(pos, peerkey->rsnie_i, peerkey->rsnie_i_len);
+ /* Peer MAC address KDE */
+ wpa_add_kde(pos, RSN_KEY_DATA_MAC_ADDR, peer, ETH_ALEN);
+
+ wpa_printf(MSG_INFO, "RSN: Sending EAPOL-Key SMK M1 Request (peer "
+ MACSTR ")", MAC2STR(peer));
+ wpa_eapol_key_send(sm, sm->ptk.kck, ver, bssid, ETH_P_EAPOL,
+ rbuf, rlen, req->key_mic);
+
+ peerkey->next = sm->peerkey;
+ sm->peerkey = peerkey;
+
+ return 0;
+}
+
+
+/**
+ * peerkey_deinit - Free PeerKey values
+ * @sm: Pointer to WPA state machine data from wpa_sm_init()
+ */
+void peerkey_deinit(struct wpa_sm *sm)
+{
+ struct wpa_peerkey *prev, *peerkey = sm->peerkey;
+ while (peerkey) {
+ prev = peerkey;
+ peerkey = peerkey->next;
+ os_free(prev);
+ }
+}
+
+
+void peerkey_rx_eapol_4way(struct wpa_sm *sm, struct wpa_peerkey *peerkey,
+ struct wpa_eapol_key *key, u16 key_info, u16 ver)
+{
+ if ((key_info & (WPA_KEY_INFO_MIC | WPA_KEY_INFO_ACK)) ==
+ (WPA_KEY_INFO_MIC | WPA_KEY_INFO_ACK)) {
+ /* 3/4 STK 4-Way Handshake */
+ wpa_supplicant_process_stk_3_of_4(sm, peerkey, key, ver);
+ } else if (key_info & WPA_KEY_INFO_ACK) {
+ /* 1/4 STK 4-Way Handshake */
+ wpa_supplicant_process_stk_1_of_4(sm, peerkey, key, ver);
+ } else if (key_info & WPA_KEY_INFO_SECURE) {
+ /* 4/4 STK 4-Way Handshake */
+ wpa_supplicant_process_stk_4_of_4(sm, peerkey, key, ver);
+ } else {
+ /* 2/4 STK 4-Way Handshake */
+ wpa_supplicant_process_stk_2_of_4(sm, peerkey, key, ver);
+ }
+}
+
+
+void peerkey_rx_eapol_smk(struct wpa_sm *sm, const u8 *src_addr,
+ struct wpa_eapol_key *key, size_t extra_len,
+ u16 key_info, u16 ver)
+{
+ if (key_info & WPA_KEY_INFO_ERROR) {
+ /* SMK Error */
+ wpa_supplicant_process_smk_error(sm, src_addr, key, extra_len);
+ } else if (key_info & WPA_KEY_INFO_ACK) {
+ /* SMK M2 */
+ wpa_supplicant_process_smk_m2(sm, src_addr, key, extra_len,
+ ver);
+ } else {
+ /* SMK M4 or M5 */
+ wpa_supplicant_process_smk_m45(sm, src_addr, key, extra_len,
+ ver);
+ }
+}
+
+#endif /* CONFIG_PEERKEY */
projects / mech_eap.orig / blobdiff