c7d293024b
While there may have initially been cases where the RSNE from Beacon/Probe Response frames was not available from some drivers, it is now more valuable to notice if such a case were to be hit with drivers that are always expected to have such information available. As such, make it a fatal error if the scan results for the current AP are not available to check the RSNE/RSNXE in EAPOL-Key msg 3/4. Signed-off-by: Jouni Malinen <j@w1.fi>
4963 lines
136 KiB
C
4963 lines
136 KiB
C
/*
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* WPA Supplicant - WPA state machine and EAPOL-Key processing
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* Copyright (c) 2003-2018, Jouni Malinen <j@w1.fi>
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* Copyright(c) 2015 Intel Deutschland GmbH
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "crypto/aes.h"
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#include "crypto/aes_wrap.h"
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#include "crypto/crypto.h"
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#include "crypto/random.h"
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#include "crypto/aes_siv.h"
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#include "crypto/sha256.h"
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#include "crypto/sha384.h"
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#include "crypto/sha512.h"
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#include "common/ieee802_11_defs.h"
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#include "common/ieee802_11_common.h"
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#include "common/ocv.h"
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#include "eap_common/eap_defs.h"
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#include "eapol_supp/eapol_supp_sm.h"
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#include "drivers/driver.h"
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#include "wpa.h"
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#include "eloop.h"
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#include "preauth.h"
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#include "pmksa_cache.h"
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#include "wpa_i.h"
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#include "wpa_ie.h"
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static const u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
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/**
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* wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message
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* @sm: Pointer to WPA state machine data from wpa_sm_init()
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* @ptk: PTK for Key Confirmation/Encryption Key
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* @ver: Version field from Key Info
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* @dest: Destination address for the frame
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* @proto: Ethertype (usually ETH_P_EAPOL)
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* @msg: EAPOL-Key message
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* @msg_len: Length of message
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* @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written
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* Returns: >= 0 on success, < 0 on failure
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*/
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int wpa_eapol_key_send(struct wpa_sm *sm, struct wpa_ptk *ptk,
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int ver, const u8 *dest, u16 proto,
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u8 *msg, size_t msg_len, u8 *key_mic)
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{
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int ret = -1;
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size_t mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
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wpa_printf(MSG_DEBUG, "WPA: Send EAPOL-Key frame to " MACSTR
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" ver=%d mic_len=%d key_mgmt=0x%x",
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MAC2STR(dest), ver, (int) mic_len, sm->key_mgmt);
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if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) {
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/*
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* Association event was not yet received; try to fetch
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* BSSID from the driver.
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*/
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if (wpa_sm_get_bssid(sm, sm->bssid) < 0) {
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wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
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"WPA: Failed to read BSSID for "
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"EAPOL-Key destination address");
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} else {
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dest = sm->bssid;
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wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
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"WPA: Use BSSID (" MACSTR
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") as the destination for EAPOL-Key",
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MAC2STR(dest));
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}
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}
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if (mic_len) {
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if (key_mic && (!ptk || !ptk->kck_len))
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goto out;
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if (key_mic &&
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wpa_eapol_key_mic(ptk->kck, ptk->kck_len, sm->key_mgmt, ver,
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msg, msg_len, key_mic)) {
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wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
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"WPA: Failed to generate EAPOL-Key version %d key_mgmt 0x%x MIC",
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ver, sm->key_mgmt);
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goto out;
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}
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if (ptk)
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wpa_hexdump_key(MSG_DEBUG, "WPA: KCK",
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ptk->kck, ptk->kck_len);
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wpa_hexdump(MSG_DEBUG, "WPA: Derived Key MIC",
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key_mic, mic_len);
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} else {
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#ifdef CONFIG_FILS
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/* AEAD cipher - Key MIC field not used */
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struct ieee802_1x_hdr *s_hdr, *hdr;
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struct wpa_eapol_key *s_key, *key;
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u8 *buf, *s_key_data, *key_data;
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size_t buf_len = msg_len + AES_BLOCK_SIZE;
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size_t key_data_len;
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u16 eapol_len;
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const u8 *aad[1];
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size_t aad_len[1];
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if (!ptk || !ptk->kek_len)
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goto out;
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key_data_len = msg_len - sizeof(struct ieee802_1x_hdr) -
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sizeof(struct wpa_eapol_key) - 2;
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buf = os_malloc(buf_len);
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if (!buf)
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goto out;
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os_memcpy(buf, msg, msg_len);
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hdr = (struct ieee802_1x_hdr *) buf;
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key = (struct wpa_eapol_key *) (hdr + 1);
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key_data = ((u8 *) (key + 1)) + 2;
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/* Update EAPOL header to include AES-SIV overhead */
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eapol_len = be_to_host16(hdr->length);
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eapol_len += AES_BLOCK_SIZE;
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hdr->length = host_to_be16(eapol_len);
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/* Update Key Data Length field to include AES-SIV overhead */
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WPA_PUT_BE16((u8 *) (key + 1), AES_BLOCK_SIZE + key_data_len);
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s_hdr = (struct ieee802_1x_hdr *) msg;
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s_key = (struct wpa_eapol_key *) (s_hdr + 1);
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s_key_data = ((u8 *) (s_key + 1)) + 2;
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wpa_hexdump_key(MSG_DEBUG, "WPA: Plaintext Key Data",
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s_key_data, key_data_len);
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wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len);
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/* AES-SIV AAD from EAPOL protocol version field (inclusive) to
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* to Key Data (exclusive). */
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aad[0] = buf;
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aad_len[0] = key_data - buf;
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if (aes_siv_encrypt(ptk->kek, ptk->kek_len,
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s_key_data, key_data_len,
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1, aad, aad_len, key_data) < 0) {
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os_free(buf);
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goto out;
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}
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wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
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key_data, AES_BLOCK_SIZE + key_data_len);
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os_free(msg);
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msg = buf;
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msg_len = buf_len;
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#else /* CONFIG_FILS */
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goto out;
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#endif /* CONFIG_FILS */
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}
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wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len);
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ret = wpa_sm_ether_send(sm, dest, proto, msg, msg_len);
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eapol_sm_notify_tx_eapol_key(sm->eapol);
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out:
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os_free(msg);
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return ret;
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}
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/**
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* wpa_sm_key_request - Send EAPOL-Key Request
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* @sm: Pointer to WPA state machine data from wpa_sm_init()
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* @error: Indicate whether this is an Michael MIC error report
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* @pairwise: 1 = error report for pairwise packet, 0 = for group packet
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*
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* Send an EAPOL-Key Request to the current authenticator. This function is
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* used to request rekeying and it is usually called when a local Michael MIC
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* failure is detected.
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*/
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void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise)
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{
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size_t mic_len, hdrlen, rlen;
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struct wpa_eapol_key *reply;
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int key_info, ver;
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u8 bssid[ETH_ALEN], *rbuf, *key_mic, *mic;
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if (pairwise && sm->wpa_deny_ptk0_rekey &&
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wpa_sm_get_state(sm) == WPA_COMPLETED) {
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wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
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"WPA: PTK0 rekey not allowed, reconnecting");
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wpa_sm_reconnect(sm);
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return;
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}
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if (wpa_use_akm_defined(sm->key_mgmt))
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ver = WPA_KEY_INFO_TYPE_AKM_DEFINED;
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else if (wpa_key_mgmt_ft(sm->key_mgmt) ||
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wpa_key_mgmt_sha256(sm->key_mgmt))
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ver = WPA_KEY_INFO_TYPE_AES_128_CMAC;
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else if (sm->pairwise_cipher != WPA_CIPHER_TKIP)
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ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
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else
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ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
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if (wpa_sm_get_bssid(sm, bssid) < 0) {
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wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
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"Failed to read BSSID for EAPOL-Key request");
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return;
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}
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mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
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hdrlen = sizeof(*reply) + mic_len + 2;
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rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
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hdrlen, &rlen, (void *) &reply);
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if (rbuf == NULL)
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return;
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reply->type = (sm->proto == WPA_PROTO_RSN ||
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sm->proto == WPA_PROTO_OSEN) ?
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EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
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key_info = WPA_KEY_INFO_REQUEST | ver;
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if (sm->ptk_set)
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key_info |= WPA_KEY_INFO_SECURE;
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if (sm->ptk_set && mic_len)
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key_info |= WPA_KEY_INFO_MIC;
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if (error)
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key_info |= WPA_KEY_INFO_ERROR;
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if (pairwise)
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key_info |= WPA_KEY_INFO_KEY_TYPE;
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WPA_PUT_BE16(reply->key_info, key_info);
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WPA_PUT_BE16(reply->key_length, 0);
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os_memcpy(reply->replay_counter, sm->request_counter,
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WPA_REPLAY_COUNTER_LEN);
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inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN);
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mic = (u8 *) (reply + 1);
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WPA_PUT_BE16(mic + mic_len, 0);
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if (!(key_info & WPA_KEY_INFO_MIC))
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key_mic = NULL;
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else
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key_mic = mic;
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wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
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"WPA: Sending EAPOL-Key Request (error=%d "
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"pairwise=%d ptk_set=%d len=%lu)",
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error, pairwise, sm->ptk_set, (unsigned long) rlen);
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wpa_eapol_key_send(sm, &sm->ptk, ver, bssid, ETH_P_EAPOL, rbuf, rlen,
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key_mic);
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}
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static void wpa_supplicant_key_mgmt_set_pmk(struct wpa_sm *sm)
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{
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#ifdef CONFIG_IEEE80211R
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if (sm->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) {
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if (wpa_sm_key_mgmt_set_pmk(sm, sm->xxkey, sm->xxkey_len))
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wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
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"RSN: Cannot set low order 256 bits of MSK for key management offload");
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} else {
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#endif /* CONFIG_IEEE80211R */
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if (wpa_sm_key_mgmt_set_pmk(sm, sm->pmk, sm->pmk_len))
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wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
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"RSN: Cannot set PMK for key management offload");
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#ifdef CONFIG_IEEE80211R
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}
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#endif /* CONFIG_IEEE80211R */
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}
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static int wpa_supplicant_get_pmk(struct wpa_sm *sm,
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const unsigned char *src_addr,
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const u8 *pmkid)
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{
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int abort_cached = 0;
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if (pmkid && !sm->cur_pmksa) {
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/* When using drivers that generate RSN IE, wpa_supplicant may
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* not have enough time to get the association information
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* event before receiving this 1/4 message, so try to find a
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* matching PMKSA cache entry here. */
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sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid,
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NULL, 0);
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if (sm->cur_pmksa) {
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wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
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"RSN: found matching PMKID from PMKSA cache");
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} else {
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wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
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"RSN: no matching PMKID found");
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abort_cached = 1;
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}
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}
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if (pmkid && sm->cur_pmksa &&
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os_memcmp_const(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) {
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wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN);
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wpa_sm_set_pmk_from_pmksa(sm);
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wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache",
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sm->pmk, sm->pmk_len);
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eapol_sm_notify_cached(sm->eapol);
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#ifdef CONFIG_IEEE80211R
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sm->xxkey_len = 0;
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#ifdef CONFIG_SAE
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if (sm->key_mgmt == WPA_KEY_MGMT_FT_SAE &&
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sm->pmk_len == PMK_LEN) {
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/* Need to allow FT key derivation to proceed with
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* PMK from SAE being used as the XXKey in cases where
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* the PMKID in msg 1/4 matches the PMKSA entry that was
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* just added based on SAE authentication for the
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* initial mobility domain association. */
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os_memcpy(sm->xxkey, sm->pmk, sm->pmk_len);
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sm->xxkey_len = sm->pmk_len;
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}
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#endif /* CONFIG_SAE */
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#endif /* CONFIG_IEEE80211R */
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} else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) {
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int res, pmk_len;
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#ifdef CONFIG_IEEE80211R
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u8 buf[2 * PMK_LEN];
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#endif /* CONFIG_IEEE80211R */
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if (wpa_key_mgmt_sha384(sm->key_mgmt))
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pmk_len = PMK_LEN_SUITE_B_192;
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else
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pmk_len = PMK_LEN;
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res = eapol_sm_get_key(sm->eapol, sm->pmk, pmk_len);
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if (res) {
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if (pmk_len == PMK_LEN) {
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/*
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* EAP-LEAP is an exception from other EAP
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* methods: it uses only 16-byte PMK.
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*/
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res = eapol_sm_get_key(sm->eapol, sm->pmk, 16);
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pmk_len = 16;
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}
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}
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#ifdef CONFIG_IEEE80211R
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if (res == 0 &&
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eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0) {
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if (wpa_key_mgmt_sha384(sm->key_mgmt)) {
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os_memcpy(sm->xxkey, buf, SHA384_MAC_LEN);
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sm->xxkey_len = SHA384_MAC_LEN;
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} else {
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os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN);
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sm->xxkey_len = PMK_LEN;
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}
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forced_memzero(buf, sizeof(buf));
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if (sm->proto == WPA_PROTO_RSN &&
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wpa_key_mgmt_ft(sm->key_mgmt)) {
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struct rsn_pmksa_cache_entry *sa = NULL;
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const u8 *fils_cache_id = NULL;
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#ifdef CONFIG_FILS
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if (sm->fils_cache_id_set)
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fils_cache_id = sm->fils_cache_id;
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#endif /* CONFIG_FILS */
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wpa_hexdump_key(MSG_DEBUG,
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"FT: Cache XXKey/MPMK",
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sm->xxkey, sm->xxkey_len);
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sa = pmksa_cache_add(sm->pmksa,
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sm->xxkey, sm->xxkey_len,
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NULL, NULL, 0,
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src_addr, sm->own_addr,
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sm->network_ctx,
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sm->key_mgmt,
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fils_cache_id);
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if (!sm->cur_pmksa)
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sm->cur_pmksa = sa;
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}
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}
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#endif /* CONFIG_IEEE80211R */
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if (res == 0) {
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struct rsn_pmksa_cache_entry *sa = NULL;
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const u8 *fils_cache_id = NULL;
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|
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#ifdef CONFIG_FILS
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if (sm->fils_cache_id_set)
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fils_cache_id = sm->fils_cache_id;
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#endif /* CONFIG_FILS */
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|
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wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state "
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"machines", sm->pmk, pmk_len);
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sm->pmk_len = pmk_len;
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wpa_supplicant_key_mgmt_set_pmk(sm);
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if (sm->proto == WPA_PROTO_RSN &&
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!wpa_key_mgmt_suite_b(sm->key_mgmt) &&
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!wpa_key_mgmt_ft(sm->key_mgmt)) {
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sa = pmksa_cache_add(sm->pmksa,
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sm->pmk, pmk_len, NULL,
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NULL, 0,
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src_addr, sm->own_addr,
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sm->network_ctx,
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sm->key_mgmt,
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fils_cache_id);
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}
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if (!sm->cur_pmksa && pmkid &&
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pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL,
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0)) {
|
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wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
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"RSN: the new PMK matches with the "
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"PMKID");
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abort_cached = 0;
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} else if (sa && !sm->cur_pmksa && pmkid) {
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/*
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* It looks like the authentication server
|
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* derived mismatching MSK. This should not
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* really happen, but bugs happen.. There is not
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* much we can do here without knowing what
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* exactly caused the server to misbehave.
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*/
|
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wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
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"RSN: PMKID mismatch - authentication server may have derived different MSK?!");
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return -1;
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}
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|
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if (!sm->cur_pmksa)
|
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sm->cur_pmksa = sa;
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#ifdef CONFIG_IEEE80211R
|
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} else if (wpa_key_mgmt_ft(sm->key_mgmt) && sm->ft_protocol) {
|
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wpa_printf(MSG_DEBUG,
|
|
"FT: Continue 4-way handshake without PMK/PMKID for association using FT protocol");
|
|
#endif /* CONFIG_IEEE80211R */
|
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} else {
|
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wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Failed to get master session key from "
|
|
"EAPOL state machines - key handshake "
|
|
"aborted");
|
|
if (sm->cur_pmksa) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"RSN: Cancelled PMKSA caching "
|
|
"attempt");
|
|
sm->cur_pmksa = NULL;
|
|
abort_cached = 1;
|
|
} else if (!abort_cached) {
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) &&
|
|
!wpa_key_mgmt_suite_b(sm->key_mgmt) &&
|
|
!wpa_key_mgmt_ft(sm->key_mgmt) && sm->key_mgmt != WPA_KEY_MGMT_OSEN)
|
|
{
|
|
/* Send EAPOL-Start to trigger full EAP authentication. */
|
|
u8 *buf;
|
|
size_t buflen;
|
|
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"RSN: no PMKSA entry found - trigger "
|
|
"full EAP authentication");
|
|
buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START,
|
|
NULL, 0, &buflen, NULL);
|
|
if (buf) {
|
|
wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL,
|
|
buf, buflen);
|
|
os_free(buf);
|
|
return -2;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @dst: Destination address for the frame
|
|
* @key: Pointer to the EAPOL-Key frame header
|
|
* @ver: Version bits from EAPOL-Key Key Info
|
|
* @nonce: Nonce value for the EAPOL-Key frame
|
|
* @wpa_ie: WPA/RSN IE
|
|
* @wpa_ie_len: Length of the WPA/RSN IE
|
|
* @ptk: PTK to use for keyed hash and encryption
|
|
* Returns: >= 0 on success, < 0 on failure
|
|
*/
|
|
int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst,
|
|
const struct wpa_eapol_key *key,
|
|
int ver, const u8 *nonce,
|
|
const u8 *wpa_ie, size_t wpa_ie_len,
|
|
struct wpa_ptk *ptk)
|
|
{
|
|
size_t mic_len, hdrlen, rlen;
|
|
struct wpa_eapol_key *reply;
|
|
u8 *rbuf, *key_mic;
|
|
u8 *rsn_ie_buf = NULL;
|
|
u16 key_info;
|
|
|
|
if (wpa_ie == NULL) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - "
|
|
"cannot generate msg 2/4");
|
|
return -1;
|
|
}
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
if (wpa_key_mgmt_ft(sm->key_mgmt)) {
|
|
int res;
|
|
|
|
wpa_hexdump(MSG_DEBUG, "WPA: WPA IE before FT processing",
|
|
wpa_ie, wpa_ie_len);
|
|
/*
|
|
* Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and
|
|
* FTIE from (Re)Association Response.
|
|
*/
|
|
rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN +
|
|
sm->assoc_resp_ies_len);
|
|
if (rsn_ie_buf == NULL)
|
|
return -1;
|
|
os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len);
|
|
res = wpa_insert_pmkid(rsn_ie_buf, &wpa_ie_len,
|
|
sm->pmk_r1_name);
|
|
if (res < 0) {
|
|
os_free(rsn_ie_buf);
|
|
return -1;
|
|
}
|
|
wpa_hexdump(MSG_DEBUG,
|
|
"WPA: WPA IE after PMKID[PMKR1Name] addition into RSNE",
|
|
rsn_ie_buf, wpa_ie_len);
|
|
|
|
if (sm->assoc_resp_ies) {
|
|
wpa_hexdump(MSG_DEBUG, "WPA: Add assoc_resp_ies",
|
|
sm->assoc_resp_ies,
|
|
sm->assoc_resp_ies_len);
|
|
os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies,
|
|
sm->assoc_resp_ies_len);
|
|
wpa_ie_len += sm->assoc_resp_ies_len;
|
|
}
|
|
|
|
wpa_ie = rsn_ie_buf;
|
|
}
|
|
#endif /* CONFIG_IEEE80211R */
|
|
|
|
wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len);
|
|
|
|
mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
|
|
hdrlen = sizeof(*reply) + mic_len + 2;
|
|
rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY,
|
|
NULL, hdrlen + wpa_ie_len,
|
|
&rlen, (void *) &reply);
|
|
if (rbuf == NULL) {
|
|
os_free(rsn_ie_buf);
|
|
return -1;
|
|
}
|
|
|
|
reply->type = (sm->proto == WPA_PROTO_RSN ||
|
|
sm->proto == WPA_PROTO_OSEN) ?
|
|
EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
|
|
key_info = ver | WPA_KEY_INFO_KEY_TYPE;
|
|
if (mic_len)
|
|
key_info |= WPA_KEY_INFO_MIC;
|
|
else
|
|
key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
|
|
WPA_PUT_BE16(reply->key_info, key_info);
|
|
if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN)
|
|
WPA_PUT_BE16(reply->key_length, 0);
|
|
else
|
|
os_memcpy(reply->key_length, key->key_length, 2);
|
|
os_memcpy(reply->replay_counter, key->replay_counter,
|
|
WPA_REPLAY_COUNTER_LEN);
|
|
wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter,
|
|
WPA_REPLAY_COUNTER_LEN);
|
|
|
|
key_mic = (u8 *) (reply + 1);
|
|
WPA_PUT_BE16(key_mic + mic_len, wpa_ie_len); /* Key Data Length */
|
|
os_memcpy(key_mic + mic_len + 2, wpa_ie, wpa_ie_len); /* Key Data */
|
|
os_free(rsn_ie_buf);
|
|
|
|
os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN);
|
|
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4");
|
|
return wpa_eapol_key_send(sm, ptk, ver, dst, ETH_P_EAPOL, rbuf, rlen,
|
|
key_mic);
|
|
}
|
|
|
|
|
|
static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr,
|
|
const struct wpa_eapol_key *key, struct wpa_ptk *ptk)
|
|
{
|
|
const u8 *z = NULL;
|
|
size_t z_len = 0;
|
|
int akmp;
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
if (wpa_key_mgmt_ft(sm->key_mgmt))
|
|
return wpa_derive_ptk_ft(sm, src_addr, key, ptk);
|
|
#endif /* CONFIG_IEEE80211R */
|
|
|
|
#ifdef CONFIG_DPP2
|
|
if (sm->key_mgmt == WPA_KEY_MGMT_DPP && sm->dpp_z) {
|
|
z = wpabuf_head(sm->dpp_z);
|
|
z_len = wpabuf_len(sm->dpp_z);
|
|
}
|
|
#endif /* CONFIG_DPP2 */
|
|
|
|
akmp = sm->key_mgmt;
|
|
#ifdef CONFIG_OWE
|
|
if (sm->owe_ptk_workaround && akmp == WPA_KEY_MGMT_OWE &&
|
|
sm->pmk_len > 32) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"OWE: Force SHA256 for PTK derivation");
|
|
akmp |= WPA_KEY_MGMT_PSK_SHA256;
|
|
}
|
|
#endif /* CONFIG_OWE */
|
|
return wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion",
|
|
sm->own_addr, sm->bssid, sm->snonce,
|
|
key->key_nonce, ptk, akmp,
|
|
sm->pairwise_cipher, z, z_len);
|
|
}
|
|
|
|
|
|
static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm,
|
|
const unsigned char *src_addr,
|
|
const struct wpa_eapol_key *key,
|
|
u16 ver, const u8 *key_data,
|
|
size_t key_data_len)
|
|
{
|
|
struct wpa_eapol_ie_parse ie;
|
|
struct wpa_ptk *ptk;
|
|
int res;
|
|
u8 *kde, *kde_buf = NULL;
|
|
size_t kde_len;
|
|
|
|
if (wpa_sm_get_network_ctx(sm) == NULL) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info "
|
|
"found (msg 1 of 4)");
|
|
return;
|
|
}
|
|
|
|
if (sm->wpa_deny_ptk0_rekey && wpa_sm_get_state(sm) == WPA_COMPLETED) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: PTK0 rekey not allowed, reconnecting");
|
|
wpa_sm_reconnect(sm);
|
|
return;
|
|
}
|
|
|
|
wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way "
|
|
"Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
|
|
|
|
os_memset(&ie, 0, sizeof(ie));
|
|
|
|
if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) {
|
|
/* RSN: msg 1/4 should contain PMKID for the selected PMK */
|
|
wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data",
|
|
key_data, key_data_len);
|
|
if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0)
|
|
goto failed;
|
|
if (ie.pmkid) {
|
|
wpa_hexdump(MSG_DEBUG, "RSN: PMKID from "
|
|
"Authenticator", ie.pmkid, PMKID_LEN);
|
|
}
|
|
}
|
|
|
|
res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid);
|
|
if (res == -2) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to "
|
|
"msg 1/4 - requesting full EAP authentication");
|
|
return;
|
|
}
|
|
if (res)
|
|
goto failed;
|
|
|
|
if (sm->renew_snonce) {
|
|
if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Failed to get random data for SNonce");
|
|
goto failed;
|
|
}
|
|
sm->renew_snonce = 0;
|
|
wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce",
|
|
sm->snonce, WPA_NONCE_LEN);
|
|
}
|
|
|
|
/* Calculate PTK which will be stored as a temporary PTK until it has
|
|
* been verified when processing message 3/4. */
|
|
ptk = &sm->tptk;
|
|
if (wpa_derive_ptk(sm, src_addr, key, ptk) < 0)
|
|
goto failed;
|
|
if (sm->pairwise_cipher == WPA_CIPHER_TKIP) {
|
|
u8 buf[8];
|
|
/* Supplicant: swap tx/rx Mic keys */
|
|
os_memcpy(buf, &ptk->tk[16], 8);
|
|
os_memcpy(&ptk->tk[16], &ptk->tk[24], 8);
|
|
os_memcpy(&ptk->tk[24], buf, 8);
|
|
forced_memzero(buf, sizeof(buf));
|
|
}
|
|
sm->tptk_set = 1;
|
|
|
|
kde = sm->assoc_wpa_ie;
|
|
kde_len = sm->assoc_wpa_ie_len;
|
|
kde_buf = os_malloc(kde_len +
|
|
2 + RSN_SELECTOR_LEN + 3 +
|
|
sm->assoc_rsnxe_len +
|
|
2 + RSN_SELECTOR_LEN + 1);
|
|
if (!kde_buf)
|
|
goto failed;
|
|
os_memcpy(kde_buf, kde, kde_len);
|
|
kde = kde_buf;
|
|
|
|
#ifdef CONFIG_OCV
|
|
if (wpa_sm_ocv_enabled(sm)) {
|
|
struct wpa_channel_info ci;
|
|
u8 *pos;
|
|
|
|
pos = kde + kde_len;
|
|
if (wpa_sm_channel_info(sm, &ci) != 0) {
|
|
wpa_printf(MSG_WARNING,
|
|
"Failed to get channel info for OCI element in EAPOL-Key 2/4");
|
|
goto failed;
|
|
}
|
|
|
|
if (ocv_insert_oci_kde(&ci, &pos) < 0)
|
|
goto failed;
|
|
kde_len = pos - kde;
|
|
}
|
|
#endif /* CONFIG_OCV */
|
|
|
|
if (sm->assoc_rsnxe && sm->assoc_rsnxe_len) {
|
|
os_memcpy(kde + kde_len, sm->assoc_rsnxe, sm->assoc_rsnxe_len);
|
|
kde_len += sm->assoc_rsnxe_len;
|
|
}
|
|
|
|
#ifdef CONFIG_P2P
|
|
if (sm->p2p) {
|
|
u8 *pos;
|
|
|
|
wpa_printf(MSG_DEBUG,
|
|
"P2P: Add IP Address Request KDE into EAPOL-Key 2/4");
|
|
pos = kde + kde_len;
|
|
*pos++ = WLAN_EID_VENDOR_SPECIFIC;
|
|
*pos++ = RSN_SELECTOR_LEN + 1;
|
|
RSN_SELECTOR_PUT(pos, WFA_KEY_DATA_IP_ADDR_REQ);
|
|
pos += RSN_SELECTOR_LEN;
|
|
*pos++ = 0x01;
|
|
kde_len = pos - kde;
|
|
}
|
|
#endif /* CONFIG_P2P */
|
|
|
|
if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce,
|
|
kde, kde_len, ptk) < 0)
|
|
goto failed;
|
|
|
|
os_free(kde_buf);
|
|
os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN);
|
|
return;
|
|
|
|
failed:
|
|
os_free(kde_buf);
|
|
wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
|
|
}
|
|
|
|
|
|
static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx)
|
|
{
|
|
struct wpa_sm *sm = eloop_ctx;
|
|
rsn_preauth_candidate_process(sm);
|
|
}
|
|
|
|
|
|
static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm,
|
|
const u8 *addr, int secure)
|
|
{
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: Key negotiation completed with "
|
|
MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr),
|
|
wpa_cipher_txt(sm->pairwise_cipher),
|
|
wpa_cipher_txt(sm->group_cipher));
|
|
wpa_sm_cancel_auth_timeout(sm);
|
|
wpa_sm_set_state(sm, WPA_COMPLETED);
|
|
|
|
if (secure) {
|
|
wpa_sm_mlme_setprotection(
|
|
sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX,
|
|
MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
|
|
eapol_sm_notify_portValid(sm->eapol, TRUE);
|
|
if (wpa_key_mgmt_wpa_psk(sm->key_mgmt) ||
|
|
sm->key_mgmt == WPA_KEY_MGMT_DPP ||
|
|
sm->key_mgmt == WPA_KEY_MGMT_OWE)
|
|
eapol_sm_notify_eap_success(sm->eapol, TRUE);
|
|
/*
|
|
* Start preauthentication after a short wait to avoid a
|
|
* possible race condition between the data receive and key
|
|
* configuration after the 4-Way Handshake. This increases the
|
|
* likelihood of the first preauth EAPOL-Start frame getting to
|
|
* the target AP.
|
|
*/
|
|
if (!dl_list_empty(&sm->pmksa_candidates))
|
|
eloop_register_timeout(1, 0, wpa_sm_start_preauth,
|
|
sm, NULL);
|
|
}
|
|
|
|
if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"RSN: Authenticator accepted "
|
|
"opportunistic PMKSA entry - marking it valid");
|
|
sm->cur_pmksa->opportunistic = 0;
|
|
}
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
if (wpa_key_mgmt_ft(sm->key_mgmt)) {
|
|
/* Prepare for the next transition */
|
|
wpa_ft_prepare_auth_request(sm, NULL);
|
|
}
|
|
#endif /* CONFIG_IEEE80211R */
|
|
}
|
|
|
|
|
|
static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
|
|
{
|
|
struct wpa_sm *sm = eloop_ctx;
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying");
|
|
wpa_sm_key_request(sm, 0, 1);
|
|
}
|
|
|
|
|
|
static int wpa_supplicant_install_ptk(struct wpa_sm *sm,
|
|
const struct wpa_eapol_key *key,
|
|
enum key_flag key_flag)
|
|
{
|
|
int keylen, rsclen;
|
|
enum wpa_alg alg;
|
|
const u8 *key_rsc;
|
|
|
|
if (sm->ptk.installed) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: Do not re-install same PTK to the driver");
|
|
return 0;
|
|
}
|
|
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: Installing PTK to the driver");
|
|
|
|
if (sm->pairwise_cipher == WPA_CIPHER_NONE) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher "
|
|
"Suite: NONE - do not use pairwise keys");
|
|
return 0;
|
|
}
|
|
|
|
if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Unsupported pairwise cipher %d",
|
|
sm->pairwise_cipher);
|
|
return -1;
|
|
}
|
|
|
|
alg = wpa_cipher_to_alg(sm->pairwise_cipher);
|
|
keylen = wpa_cipher_key_len(sm->pairwise_cipher);
|
|
if (keylen <= 0 || (unsigned int) keylen != sm->ptk.tk_len) {
|
|
wpa_printf(MSG_DEBUG, "WPA: TK length mismatch: %d != %lu",
|
|
keylen, (long unsigned int) sm->ptk.tk_len);
|
|
return -1;
|
|
}
|
|
rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher);
|
|
|
|
if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) {
|
|
key_rsc = null_rsc;
|
|
} else {
|
|
key_rsc = key->key_rsc;
|
|
wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen);
|
|
}
|
|
|
|
if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen,
|
|
sm->ptk.tk, keylen,
|
|
KEY_FLAG_PAIRWISE | key_flag) < 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Failed to set PTK to the "
|
|
"driver (alg=%d keylen=%d bssid=" MACSTR ")",
|
|
alg, keylen, MAC2STR(sm->bssid));
|
|
return -1;
|
|
}
|
|
|
|
/* TK is not needed anymore in supplicant */
|
|
os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN);
|
|
sm->ptk.tk_len = 0;
|
|
sm->ptk.installed = 1;
|
|
|
|
if (sm->wpa_ptk_rekey) {
|
|
eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
|
|
eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk,
|
|
sm, NULL);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm,
|
|
int group_cipher,
|
|
int keylen, int maxkeylen,
|
|
int *key_rsc_len,
|
|
enum wpa_alg *alg)
|
|
{
|
|
int klen;
|
|
|
|
*alg = wpa_cipher_to_alg(group_cipher);
|
|
if (*alg == WPA_ALG_NONE) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Unsupported Group Cipher %d",
|
|
group_cipher);
|
|
return -1;
|
|
}
|
|
*key_rsc_len = wpa_cipher_rsc_len(group_cipher);
|
|
|
|
klen = wpa_cipher_key_len(group_cipher);
|
|
if (keylen != klen || maxkeylen < klen) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Unsupported %s Group Cipher key length %d (%d)",
|
|
wpa_cipher_txt(group_cipher), keylen, maxkeylen);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
struct wpa_gtk_data {
|
|
enum wpa_alg alg;
|
|
int tx, key_rsc_len, keyidx;
|
|
u8 gtk[32];
|
|
int gtk_len;
|
|
};
|
|
|
|
|
|
static int wpa_supplicant_install_gtk(struct wpa_sm *sm,
|
|
const struct wpa_gtk_data *gd,
|
|
const u8 *key_rsc, int wnm_sleep)
|
|
{
|
|
const u8 *_gtk = gd->gtk;
|
|
u8 gtk_buf[32];
|
|
|
|
/* Detect possible key reinstallation */
|
|
if ((sm->gtk.gtk_len == (size_t) gd->gtk_len &&
|
|
os_memcmp(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len) == 0) ||
|
|
(sm->gtk_wnm_sleep.gtk_len == (size_t) gd->gtk_len &&
|
|
os_memcmp(sm->gtk_wnm_sleep.gtk, gd->gtk,
|
|
sm->gtk_wnm_sleep.gtk_len) == 0)) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: Not reinstalling already in-use GTK to the driver (keyidx=%d tx=%d len=%d)",
|
|
gd->keyidx, gd->tx, gd->gtk_len);
|
|
return 0;
|
|
}
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len);
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)",
|
|
gd->keyidx, gd->tx, gd->gtk_len);
|
|
wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len);
|
|
if (sm->group_cipher == WPA_CIPHER_TKIP) {
|
|
/* Swap Tx/Rx keys for Michael MIC */
|
|
os_memcpy(gtk_buf, gd->gtk, 16);
|
|
os_memcpy(gtk_buf + 16, gd->gtk + 24, 8);
|
|
os_memcpy(gtk_buf + 24, gd->gtk + 16, 8);
|
|
_gtk = gtk_buf;
|
|
}
|
|
if (sm->pairwise_cipher == WPA_CIPHER_NONE) {
|
|
if (wpa_sm_set_key(sm, gd->alg, NULL,
|
|
gd->keyidx, 1, key_rsc, gd->key_rsc_len,
|
|
_gtk, gd->gtk_len,
|
|
KEY_FLAG_GROUP_RX_TX_DEFAULT) < 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Failed to set GTK to the driver "
|
|
"(Group only)");
|
|
forced_memzero(gtk_buf, sizeof(gtk_buf));
|
|
return -1;
|
|
}
|
|
} else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr,
|
|
gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len,
|
|
_gtk, gd->gtk_len, KEY_FLAG_GROUP_RX) < 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Failed to set GTK to "
|
|
"the driver (alg=%d keylen=%d keyidx=%d)",
|
|
gd->alg, gd->gtk_len, gd->keyidx);
|
|
forced_memzero(gtk_buf, sizeof(gtk_buf));
|
|
return -1;
|
|
}
|
|
forced_memzero(gtk_buf, sizeof(gtk_buf));
|
|
|
|
if (wnm_sleep) {
|
|
sm->gtk_wnm_sleep.gtk_len = gd->gtk_len;
|
|
os_memcpy(sm->gtk_wnm_sleep.gtk, gd->gtk,
|
|
sm->gtk_wnm_sleep.gtk_len);
|
|
} else {
|
|
sm->gtk.gtk_len = gd->gtk_len;
|
|
os_memcpy(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm,
|
|
int tx)
|
|
{
|
|
if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) {
|
|
/* Ignore Tx bit for GTK if a pairwise key is used. One AP
|
|
* seemed to set this bit (incorrectly, since Tx is only when
|
|
* doing Group Key only APs) and without this workaround, the
|
|
* data connection does not work because wpa_supplicant
|
|
* configured non-zero keyidx to be used for unicast. */
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: Tx bit set for GTK, but pairwise "
|
|
"keys are used - ignore Tx bit");
|
|
return 0;
|
|
}
|
|
return tx;
|
|
}
|
|
|
|
|
|
static int wpa_supplicant_rsc_relaxation(const struct wpa_sm *sm,
|
|
const u8 *rsc)
|
|
{
|
|
int rsclen;
|
|
|
|
if (!sm->wpa_rsc_relaxation)
|
|
return 0;
|
|
|
|
rsclen = wpa_cipher_rsc_len(sm->group_cipher);
|
|
|
|
/*
|
|
* Try to detect RSC (endian) corruption issue where the AP sends
|
|
* the RSC bytes in EAPOL-Key message in the wrong order, both if
|
|
* it's actually a 6-byte field (as it should be) and if it treats
|
|
* it as an 8-byte field.
|
|
* An AP model known to have this bug is the Sapido RB-1632.
|
|
*/
|
|
if (rsclen == 6 && ((rsc[5] && !rsc[0]) || rsc[6] || rsc[7])) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"RSC %02x%02x%02x%02x%02x%02x%02x%02x is likely bogus, using 0",
|
|
rsc[0], rsc[1], rsc[2], rsc[3],
|
|
rsc[4], rsc[5], rsc[6], rsc[7]);
|
|
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm,
|
|
const struct wpa_eapol_key *key,
|
|
const u8 *gtk, size_t gtk_len,
|
|
int key_info)
|
|
{
|
|
struct wpa_gtk_data gd;
|
|
const u8 *key_rsc;
|
|
|
|
/*
|
|
* IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x
|
|
* GTK KDE format:
|
|
* KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7]
|
|
* Reserved [bits 0-7]
|
|
* GTK
|
|
*/
|
|
|
|
os_memset(&gd, 0, sizeof(gd));
|
|
wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake",
|
|
gtk, gtk_len);
|
|
|
|
if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk))
|
|
return -1;
|
|
|
|
gd.keyidx = gtk[0] & 0x3;
|
|
gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
|
|
!!(gtk[0] & BIT(2)));
|
|
gtk += 2;
|
|
gtk_len -= 2;
|
|
|
|
os_memcpy(gd.gtk, gtk, gtk_len);
|
|
gd.gtk_len = gtk_len;
|
|
|
|
key_rsc = key->key_rsc;
|
|
if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc))
|
|
key_rsc = null_rsc;
|
|
|
|
if (sm->group_cipher != WPA_CIPHER_GTK_NOT_USED &&
|
|
(wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
|
|
gtk_len, gtk_len,
|
|
&gd.key_rsc_len, &gd.alg) ||
|
|
wpa_supplicant_install_gtk(sm, &gd, key_rsc, 0))) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"RSN: Failed to install GTK");
|
|
forced_memzero(&gd, sizeof(gd));
|
|
return -1;
|
|
}
|
|
forced_memzero(&gd, sizeof(gd));
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int wpa_supplicant_install_igtk(struct wpa_sm *sm,
|
|
const struct wpa_igtk_kde *igtk,
|
|
int wnm_sleep)
|
|
{
|
|
size_t len = wpa_cipher_key_len(sm->mgmt_group_cipher);
|
|
u16 keyidx = WPA_GET_LE16(igtk->keyid);
|
|
|
|
/* Detect possible key reinstallation */
|
|
if ((sm->igtk.igtk_len == len &&
|
|
os_memcmp(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len) == 0) ||
|
|
(sm->igtk_wnm_sleep.igtk_len == len &&
|
|
os_memcmp(sm->igtk_wnm_sleep.igtk, igtk->igtk,
|
|
sm->igtk_wnm_sleep.igtk_len) == 0)) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: Not reinstalling already in-use IGTK to the driver (keyidx=%d)",
|
|
keyidx);
|
|
return 0;
|
|
}
|
|
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: IGTK keyid %d pn " COMPACT_MACSTR,
|
|
keyidx, MAC2STR(igtk->pn));
|
|
wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", igtk->igtk, len);
|
|
if (keyidx > 4095) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Invalid IGTK KeyID %d", keyidx);
|
|
return -1;
|
|
}
|
|
if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher),
|
|
broadcast_ether_addr,
|
|
keyidx, 0, igtk->pn, sizeof(igtk->pn),
|
|
igtk->igtk, len, KEY_FLAG_GROUP_RX) < 0) {
|
|
if (keyidx == 0x0400 || keyidx == 0x0500) {
|
|
/* Assume the AP has broken PMF implementation since it
|
|
* seems to have swapped the KeyID bytes. The AP cannot
|
|
* be trusted to implement BIP correctly or provide a
|
|
* valid IGTK, so do not try to configure this key with
|
|
* swapped KeyID bytes. Instead, continue without
|
|
* configuring the IGTK so that the driver can drop any
|
|
* received group-addressed robust management frames due
|
|
* to missing keys.
|
|
*
|
|
* Normally, this error behavior would result in us
|
|
* disconnecting, but there are number of deployed APs
|
|
* with this broken behavior, so as an interoperability
|
|
* workaround, allow the connection to proceed. */
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: Ignore IGTK configuration error due to invalid IGTK KeyID byte order");
|
|
} else {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Failed to configure IGTK to the driver");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (wnm_sleep) {
|
|
sm->igtk_wnm_sleep.igtk_len = len;
|
|
os_memcpy(sm->igtk_wnm_sleep.igtk, igtk->igtk,
|
|
sm->igtk_wnm_sleep.igtk_len);
|
|
} else {
|
|
sm->igtk.igtk_len = len;
|
|
os_memcpy(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int wpa_supplicant_install_bigtk(struct wpa_sm *sm,
|
|
const struct wpa_bigtk_kde *bigtk,
|
|
int wnm_sleep)
|
|
{
|
|
size_t len = wpa_cipher_key_len(sm->mgmt_group_cipher);
|
|
u16 keyidx = WPA_GET_LE16(bigtk->keyid);
|
|
|
|
/* Detect possible key reinstallation */
|
|
if ((sm->bigtk.bigtk_len == len &&
|
|
os_memcmp(sm->bigtk.bigtk, bigtk->bigtk,
|
|
sm->bigtk.bigtk_len) == 0) ||
|
|
(sm->bigtk_wnm_sleep.bigtk_len == len &&
|
|
os_memcmp(sm->bigtk_wnm_sleep.bigtk, bigtk->bigtk,
|
|
sm->bigtk_wnm_sleep.bigtk_len) == 0)) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: Not reinstalling already in-use BIGTK to the driver (keyidx=%d)",
|
|
keyidx);
|
|
return 0;
|
|
}
|
|
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: BIGTK keyid %d pn " COMPACT_MACSTR,
|
|
keyidx, MAC2STR(bigtk->pn));
|
|
wpa_hexdump_key(MSG_DEBUG, "WPA: BIGTK", bigtk->bigtk, len);
|
|
if (keyidx < 6 || keyidx > 7) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Invalid BIGTK KeyID %d", keyidx);
|
|
return -1;
|
|
}
|
|
if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher),
|
|
broadcast_ether_addr,
|
|
keyidx, 0, bigtk->pn, sizeof(bigtk->pn),
|
|
bigtk->bigtk, len, KEY_FLAG_GROUP_RX) < 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Failed to configure BIGTK to the driver");
|
|
return -1;
|
|
}
|
|
|
|
if (wnm_sleep) {
|
|
sm->bigtk_wnm_sleep.bigtk_len = len;
|
|
os_memcpy(sm->bigtk_wnm_sleep.bigtk, bigtk->bigtk,
|
|
sm->bigtk_wnm_sleep.bigtk_len);
|
|
} else {
|
|
sm->bigtk.bigtk_len = len;
|
|
os_memcpy(sm->bigtk.bigtk, bigtk->bigtk, sm->bigtk.bigtk_len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int ieee80211w_set_keys(struct wpa_sm *sm,
|
|
struct wpa_eapol_ie_parse *ie)
|
|
{
|
|
size_t len;
|
|
|
|
if (!wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher))
|
|
return 0;
|
|
|
|
if (ie->igtk) {
|
|
const struct wpa_igtk_kde *igtk;
|
|
|
|
len = wpa_cipher_key_len(sm->mgmt_group_cipher);
|
|
if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len)
|
|
return -1;
|
|
|
|
igtk = (const struct wpa_igtk_kde *) ie->igtk;
|
|
if (wpa_supplicant_install_igtk(sm, igtk, 0) < 0)
|
|
return -1;
|
|
}
|
|
|
|
if (ie->bigtk && sm->beacon_prot) {
|
|
const struct wpa_bigtk_kde *bigtk;
|
|
|
|
len = wpa_cipher_key_len(sm->mgmt_group_cipher);
|
|
if (ie->bigtk_len != WPA_BIGTK_KDE_PREFIX_LEN + len)
|
|
return -1;
|
|
|
|
bigtk = (const struct wpa_bigtk_kde *) ie->bigtk;
|
|
if (wpa_supplicant_install_bigtk(sm, bigtk, 0) < 0)
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void wpa_report_ie_mismatch(struct wpa_sm *sm,
|
|
const char *reason, const u8 *src_addr,
|
|
const u8 *wpa_ie, size_t wpa_ie_len,
|
|
const u8 *rsn_ie, size_t rsn_ie_len)
|
|
{
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")",
|
|
reason, MAC2STR(src_addr));
|
|
|
|
if (sm->ap_wpa_ie) {
|
|
wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp",
|
|
sm->ap_wpa_ie, sm->ap_wpa_ie_len);
|
|
}
|
|
if (wpa_ie) {
|
|
if (!sm->ap_wpa_ie) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: No WPA IE in Beacon/ProbeResp");
|
|
}
|
|
wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg",
|
|
wpa_ie, wpa_ie_len);
|
|
}
|
|
|
|
if (sm->ap_rsn_ie) {
|
|
wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp",
|
|
sm->ap_rsn_ie, sm->ap_rsn_ie_len);
|
|
}
|
|
if (rsn_ie) {
|
|
if (!sm->ap_rsn_ie) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: No RSN IE in Beacon/ProbeResp");
|
|
}
|
|
wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg",
|
|
rsn_ie, rsn_ie_len);
|
|
}
|
|
|
|
wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS);
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
|
|
static int ft_validate_mdie(struct wpa_sm *sm,
|
|
const unsigned char *src_addr,
|
|
struct wpa_eapol_ie_parse *ie,
|
|
const u8 *assoc_resp_mdie)
|
|
{
|
|
struct rsn_mdie *mdie;
|
|
|
|
mdie = (struct rsn_mdie *) (ie->mdie + 2);
|
|
if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) ||
|
|
os_memcmp(mdie->mobility_domain, sm->mobility_domain,
|
|
MOBILITY_DOMAIN_ID_LEN) != 0) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did "
|
|
"not match with the current mobility domain");
|
|
return -1;
|
|
}
|
|
|
|
if (assoc_resp_mdie &&
|
|
(assoc_resp_mdie[1] != ie->mdie[1] ||
|
|
os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch");
|
|
wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4",
|
|
ie->mdie, 2 + ie->mdie[1]);
|
|
wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response",
|
|
assoc_resp_mdie, 2 + assoc_resp_mdie[1]);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int ft_validate_ftie(struct wpa_sm *sm,
|
|
const unsigned char *src_addr,
|
|
struct wpa_eapol_ie_parse *ie,
|
|
const u8 *assoc_resp_ftie)
|
|
{
|
|
if (ie->ftie == NULL) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"FT: No FTIE in EAPOL-Key msg 3/4");
|
|
return -1;
|
|
}
|
|
|
|
if (assoc_resp_ftie == NULL)
|
|
return 0;
|
|
|
|
if (assoc_resp_ftie[1] != ie->ftie[1] ||
|
|
os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch");
|
|
wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4",
|
|
ie->ftie, 2 + ie->ftie[1]);
|
|
wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response",
|
|
assoc_resp_ftie, 2 + assoc_resp_ftie[1]);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int ft_validate_rsnie(struct wpa_sm *sm,
|
|
const unsigned char *src_addr,
|
|
struct wpa_eapol_ie_parse *ie)
|
|
{
|
|
struct wpa_ie_data rsn;
|
|
|
|
if (!ie->rsn_ie)
|
|
return 0;
|
|
|
|
/*
|
|
* Verify that PMKR1Name from EAPOL-Key message 3/4
|
|
* matches with the value we derived.
|
|
*/
|
|
if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 ||
|
|
rsn.num_pmkid != 1 || rsn.pmkid == NULL) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in "
|
|
"FT 4-way handshake message 3/4");
|
|
return -1;
|
|
}
|
|
|
|
if (os_memcmp_const(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
|
|
{
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"FT: PMKR1Name mismatch in "
|
|
"FT 4-way handshake message 3/4");
|
|
wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator",
|
|
rsn.pmkid, WPA_PMK_NAME_LEN);
|
|
wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
|
|
sm->pmk_r1_name, WPA_PMK_NAME_LEN);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm,
|
|
const unsigned char *src_addr,
|
|
struct wpa_eapol_ie_parse *ie)
|
|
{
|
|
const u8 *pos, *end, *mdie = NULL, *ftie = NULL;
|
|
|
|
if (sm->assoc_resp_ies) {
|
|
pos = sm->assoc_resp_ies;
|
|
end = pos + sm->assoc_resp_ies_len;
|
|
while (end - pos > 2) {
|
|
if (2 + pos[1] > end - pos)
|
|
break;
|
|
switch (*pos) {
|
|
case WLAN_EID_MOBILITY_DOMAIN:
|
|
mdie = pos;
|
|
break;
|
|
case WLAN_EID_FAST_BSS_TRANSITION:
|
|
ftie = pos;
|
|
break;
|
|
}
|
|
pos += 2 + pos[1];
|
|
}
|
|
}
|
|
|
|
if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 ||
|
|
ft_validate_ftie(sm, src_addr, ie, ftie) < 0 ||
|
|
ft_validate_rsnie(sm, src_addr, ie) < 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_IEEE80211R */
|
|
|
|
|
|
static int wpa_supplicant_validate_ie(struct wpa_sm *sm,
|
|
const unsigned char *src_addr,
|
|
struct wpa_eapol_ie_parse *ie)
|
|
{
|
|
if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: No WPA/RSN IE for this AP known. "
|
|
"Trying to get from scan results");
|
|
if (wpa_sm_get_beacon_ie(sm) < 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Could not find AP from "
|
|
"the scan results");
|
|
return -1;
|
|
}
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: Found the current AP from updated scan results");
|
|
}
|
|
|
|
if (ie->wpa_ie == NULL && ie->rsn_ie == NULL &&
|
|
(sm->ap_wpa_ie || sm->ap_rsn_ie)) {
|
|
wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
|
|
"with IE in Beacon/ProbeResp (no IE?)",
|
|
src_addr, ie->wpa_ie, ie->wpa_ie_len,
|
|
ie->rsn_ie, ie->rsn_ie_len);
|
|
return -1;
|
|
}
|
|
|
|
if ((ie->wpa_ie && sm->ap_wpa_ie &&
|
|
(ie->wpa_ie_len != sm->ap_wpa_ie_len ||
|
|
os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) ||
|
|
(ie->rsn_ie && sm->ap_rsn_ie &&
|
|
wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt),
|
|
sm->ap_rsn_ie, sm->ap_rsn_ie_len,
|
|
ie->rsn_ie, ie->rsn_ie_len))) {
|
|
wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
|
|
"with IE in Beacon/ProbeResp",
|
|
src_addr, ie->wpa_ie, ie->wpa_ie_len,
|
|
ie->rsn_ie, ie->rsn_ie_len);
|
|
return -1;
|
|
}
|
|
|
|
if (sm->proto == WPA_PROTO_WPA &&
|
|
ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) {
|
|
wpa_report_ie_mismatch(sm, "Possible downgrade attack "
|
|
"detected - RSN was enabled and RSN IE "
|
|
"was in msg 3/4, but not in "
|
|
"Beacon/ProbeResp",
|
|
src_addr, ie->wpa_ie, ie->wpa_ie_len,
|
|
ie->rsn_ie, ie->rsn_ie_len);
|
|
return -1;
|
|
}
|
|
|
|
if ((sm->ap_rsnxe && !ie->rsnxe) ||
|
|
(!sm->ap_rsnxe && ie->rsnxe) ||
|
|
(sm->ap_rsnxe && ie->rsnxe &&
|
|
(sm->ap_rsnxe_len != ie->rsnxe_len ||
|
|
os_memcmp(sm->ap_rsnxe, ie->rsnxe, sm->ap_rsnxe_len) != 0))) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: RSNXE mismatch between Beacon/ProbeResp and EAPOL-Key msg 3/4");
|
|
wpa_hexdump(MSG_INFO, "RSNXE in Beacon/ProbeResp",
|
|
sm->ap_rsnxe, sm->ap_rsnxe_len);
|
|
wpa_hexdump(MSG_INFO, "RSNXE in EAPOL-Key msg 3/4",
|
|
ie->rsnxe, ie->rsnxe_len);
|
|
wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS);
|
|
return -1;
|
|
}
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
if (wpa_key_mgmt_ft(sm->key_mgmt) &&
|
|
wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0)
|
|
return -1;
|
|
#endif /* CONFIG_IEEE80211R */
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @dst: Destination address for the frame
|
|
* @key: Pointer to the EAPOL-Key frame header
|
|
* @ver: Version bits from EAPOL-Key Key Info
|
|
* @key_info: Key Info
|
|
* @ptk: PTK to use for keyed hash and encryption
|
|
* Returns: >= 0 on success, < 0 on failure
|
|
*/
|
|
int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst,
|
|
const struct wpa_eapol_key *key,
|
|
u16 ver, u16 key_info,
|
|
struct wpa_ptk *ptk)
|
|
{
|
|
size_t mic_len, hdrlen, rlen;
|
|
struct wpa_eapol_key *reply;
|
|
u8 *rbuf, *key_mic;
|
|
|
|
mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
|
|
hdrlen = sizeof(*reply) + mic_len + 2;
|
|
rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
|
|
hdrlen, &rlen, (void *) &reply);
|
|
if (rbuf == NULL)
|
|
return -1;
|
|
|
|
reply->type = (sm->proto == WPA_PROTO_RSN ||
|
|
sm->proto == WPA_PROTO_OSEN) ?
|
|
EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
|
|
key_info &= WPA_KEY_INFO_SECURE;
|
|
key_info |= ver | WPA_KEY_INFO_KEY_TYPE;
|
|
if (mic_len)
|
|
key_info |= WPA_KEY_INFO_MIC;
|
|
else
|
|
key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
|
|
WPA_PUT_BE16(reply->key_info, key_info);
|
|
if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN)
|
|
WPA_PUT_BE16(reply->key_length, 0);
|
|
else
|
|
os_memcpy(reply->key_length, key->key_length, 2);
|
|
os_memcpy(reply->replay_counter, key->replay_counter,
|
|
WPA_REPLAY_COUNTER_LEN);
|
|
|
|
key_mic = (u8 *) (reply + 1);
|
|
WPA_PUT_BE16(key_mic + mic_len, 0);
|
|
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4");
|
|
return wpa_eapol_key_send(sm, ptk, ver, dst, ETH_P_EAPOL, rbuf, rlen,
|
|
key_mic);
|
|
}
|
|
|
|
|
|
static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm,
|
|
const struct wpa_eapol_key *key,
|
|
u16 ver, const u8 *key_data,
|
|
size_t key_data_len)
|
|
{
|
|
u16 key_info, keylen;
|
|
struct wpa_eapol_ie_parse ie;
|
|
|
|
wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way "
|
|
"Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver);
|
|
|
|
key_info = WPA_GET_BE16(key->key_info);
|
|
|
|
wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", key_data, key_data_len);
|
|
if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0)
|
|
goto failed;
|
|
if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: GTK IE in unencrypted key data");
|
|
goto failed;
|
|
}
|
|
if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: IGTK KDE in unencrypted key data");
|
|
goto failed;
|
|
}
|
|
|
|
if (ie.igtk &&
|
|
wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher) &&
|
|
ie.igtk_len != WPA_IGTK_KDE_PREFIX_LEN +
|
|
(unsigned int) wpa_cipher_key_len(sm->mgmt_group_cipher)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Invalid IGTK KDE length %lu",
|
|
(unsigned long) ie.igtk_len);
|
|
goto failed;
|
|
}
|
|
|
|
if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0)
|
|
goto failed;
|
|
|
|
if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: ANonce from message 1 of 4-Way Handshake "
|
|
"differs from 3 of 4-Way Handshake - drop packet (src="
|
|
MACSTR ")", MAC2STR(sm->bssid));
|
|
goto failed;
|
|
}
|
|
|
|
keylen = WPA_GET_BE16(key->key_length);
|
|
if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Invalid %s key length %d (src=" MACSTR
|
|
")", wpa_cipher_txt(sm->pairwise_cipher), keylen,
|
|
MAC2STR(sm->bssid));
|
|
goto failed;
|
|
}
|
|
|
|
#ifdef CONFIG_P2P
|
|
if (ie.ip_addr_alloc) {
|
|
os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4);
|
|
wpa_hexdump(MSG_DEBUG, "P2P: IP address info",
|
|
sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr));
|
|
}
|
|
#endif /* CONFIG_P2P */
|
|
|
|
#ifdef CONFIG_OCV
|
|
if (wpa_sm_ocv_enabled(sm)) {
|
|
struct wpa_channel_info ci;
|
|
|
|
if (wpa_sm_channel_info(sm, &ci) != 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"Failed to get channel info to validate received OCI in EAPOL-Key 3/4");
|
|
return;
|
|
}
|
|
|
|
if (ocv_verify_tx_params(ie.oci, ie.oci_len, &ci,
|
|
channel_width_to_int(ci.chanwidth),
|
|
ci.seg1_idx) != 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "%s",
|
|
ocv_errorstr);
|
|
return;
|
|
}
|
|
}
|
|
#endif /* CONFIG_OCV */
|
|
|
|
if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info,
|
|
&sm->ptk) < 0) {
|
|
goto failed;
|
|
}
|
|
|
|
/* SNonce was successfully used in msg 3/4, so mark it to be renewed
|
|
* for the next 4-Way Handshake. If msg 3 is received again, the old
|
|
* SNonce will still be used to avoid changing PTK. */
|
|
sm->renew_snonce = 1;
|
|
|
|
if (key_info & WPA_KEY_INFO_INSTALL) {
|
|
if (wpa_supplicant_install_ptk(sm, key, KEY_FLAG_RX_TX))
|
|
goto failed;
|
|
}
|
|
|
|
if (key_info & WPA_KEY_INFO_SECURE) {
|
|
wpa_sm_mlme_setprotection(
|
|
sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX,
|
|
MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
|
|
eapol_sm_notify_portValid(sm->eapol, TRUE);
|
|
}
|
|
wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
|
|
|
|
if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) {
|
|
/* No GTK to be set to the driver */
|
|
} else if (!ie.gtk && sm->proto == WPA_PROTO_RSN) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"RSN: No GTK KDE included in EAPOL-Key msg 3/4");
|
|
goto failed;
|
|
} else if (ie.gtk &&
|
|
wpa_supplicant_pairwise_gtk(sm, key,
|
|
ie.gtk, ie.gtk_len, key_info) < 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"RSN: Failed to configure GTK");
|
|
goto failed;
|
|
}
|
|
|
|
if (ieee80211w_set_keys(sm, &ie) < 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"RSN: Failed to configure IGTK");
|
|
goto failed;
|
|
}
|
|
|
|
if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED || ie.gtk)
|
|
wpa_supplicant_key_neg_complete(sm, sm->bssid,
|
|
key_info & WPA_KEY_INFO_SECURE);
|
|
|
|
if (ie.gtk)
|
|
wpa_sm_set_rekey_offload(sm);
|
|
|
|
/* Add PMKSA cache entry for Suite B AKMs here since PMKID can be
|
|
* calculated only after KCK has been derived. Though, do not replace an
|
|
* existing PMKSA entry after each 4-way handshake (i.e., new KCK/PMKID)
|
|
* to avoid unnecessary changes of PMKID while continuing to use the
|
|
* same PMK. */
|
|
if (sm->proto == WPA_PROTO_RSN && wpa_key_mgmt_suite_b(sm->key_mgmt) &&
|
|
!sm->cur_pmksa) {
|
|
struct rsn_pmksa_cache_entry *sa;
|
|
|
|
sa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, NULL,
|
|
sm->ptk.kck, sm->ptk.kck_len,
|
|
sm->bssid, sm->own_addr,
|
|
sm->network_ctx, sm->key_mgmt, NULL);
|
|
if (!sm->cur_pmksa)
|
|
sm->cur_pmksa = sa;
|
|
}
|
|
|
|
sm->msg_3_of_4_ok = 1;
|
|
return;
|
|
|
|
failed:
|
|
wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
|
|
}
|
|
|
|
|
|
static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm,
|
|
const u8 *keydata,
|
|
size_t keydatalen,
|
|
u16 key_info,
|
|
struct wpa_gtk_data *gd)
|
|
{
|
|
int maxkeylen;
|
|
struct wpa_eapol_ie_parse ie;
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "RSN: msg 1/2 key data",
|
|
keydata, keydatalen);
|
|
if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0)
|
|
return -1;
|
|
if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: GTK IE in unencrypted key data");
|
|
return -1;
|
|
}
|
|
if (ie.gtk == NULL) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: No GTK IE in Group Key msg 1/2");
|
|
return -1;
|
|
}
|
|
maxkeylen = gd->gtk_len = ie.gtk_len - 2;
|
|
|
|
#ifdef CONFIG_OCV
|
|
if (wpa_sm_ocv_enabled(sm)) {
|
|
struct wpa_channel_info ci;
|
|
|
|
if (wpa_sm_channel_info(sm, &ci) != 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"Failed to get channel info to validate received OCI in EAPOL-Key group msg 1/2");
|
|
return -1;
|
|
}
|
|
|
|
if (ocv_verify_tx_params(ie.oci, ie.oci_len, &ci,
|
|
channel_width_to_int(ci.chanwidth),
|
|
ci.seg1_idx) != 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "%s",
|
|
ocv_errorstr);
|
|
return -1;
|
|
}
|
|
}
|
|
#endif /* CONFIG_OCV */
|
|
|
|
if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
|
|
gd->gtk_len, maxkeylen,
|
|
&gd->key_rsc_len, &gd->alg))
|
|
return -1;
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in group key handshake",
|
|
ie.gtk, ie.gtk_len);
|
|
gd->keyidx = ie.gtk[0] & 0x3;
|
|
gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
|
|
!!(ie.gtk[0] & BIT(2)));
|
|
if (ie.gtk_len - 2 > sizeof(gd->gtk)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"RSN: Too long GTK in GTK IE (len=%lu)",
|
|
(unsigned long) ie.gtk_len - 2);
|
|
return -1;
|
|
}
|
|
os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2);
|
|
|
|
if (ieee80211w_set_keys(sm, &ie) < 0)
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"RSN: Failed to configure IGTK");
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm,
|
|
const struct wpa_eapol_key *key,
|
|
const u8 *key_data,
|
|
size_t key_data_len, u16 key_info,
|
|
u16 ver, struct wpa_gtk_data *gd)
|
|
{
|
|
size_t maxkeylen;
|
|
u16 gtk_len;
|
|
|
|
gtk_len = WPA_GET_BE16(key->key_length);
|
|
maxkeylen = key_data_len;
|
|
if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
|
|
if (maxkeylen < 8) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: Too short maxkeylen (%lu)",
|
|
(unsigned long) maxkeylen);
|
|
return -1;
|
|
}
|
|
maxkeylen -= 8;
|
|
}
|
|
|
|
if (gtk_len > maxkeylen ||
|
|
wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
|
|
gtk_len, maxkeylen,
|
|
&gd->key_rsc_len, &gd->alg))
|
|
return -1;
|
|
|
|
gd->gtk_len = gtk_len;
|
|
gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
|
|
WPA_KEY_INFO_KEY_INDEX_SHIFT;
|
|
if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) {
|
|
#ifdef CONFIG_NO_RC4
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: RC4 not supported in the build");
|
|
return -1;
|
|
#else /* CONFIG_NO_RC4 */
|
|
u8 ek[32];
|
|
if (key_data_len > sizeof(gd->gtk)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: RC4 key data too long (%lu)",
|
|
(unsigned long) key_data_len);
|
|
return -1;
|
|
}
|
|
os_memcpy(ek, key->key_iv, 16);
|
|
os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len);
|
|
os_memcpy(gd->gtk, key_data, key_data_len);
|
|
if (rc4_skip(ek, 32, 256, gd->gtk, key_data_len)) {
|
|
forced_memzero(ek, sizeof(ek));
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
|
|
"WPA: RC4 failed");
|
|
return -1;
|
|
}
|
|
forced_memzero(ek, sizeof(ek));
|
|
#endif /* CONFIG_NO_RC4 */
|
|
} else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
|
|
if (maxkeylen % 8) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Unsupported AES-WRAP len %lu",
|
|
(unsigned long) maxkeylen);
|
|
return -1;
|
|
}
|
|
if (maxkeylen > sizeof(gd->gtk)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: AES-WRAP key data "
|
|
"too long (keydatalen=%lu maxkeylen=%lu)",
|
|
(unsigned long) key_data_len,
|
|
(unsigned long) maxkeylen);
|
|
return -1;
|
|
}
|
|
if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, maxkeylen / 8,
|
|
key_data, gd->gtk)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: AES unwrap failed - could not decrypt "
|
|
"GTK");
|
|
return -1;
|
|
}
|
|
} else {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Unsupported key_info type %d", ver);
|
|
return -1;
|
|
}
|
|
gd->tx = wpa_supplicant_gtk_tx_bit_workaround(
|
|
sm, !!(key_info & WPA_KEY_INFO_TXRX));
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm,
|
|
const struct wpa_eapol_key *key,
|
|
int ver, u16 key_info)
|
|
{
|
|
size_t mic_len, hdrlen, rlen;
|
|
struct wpa_eapol_key *reply;
|
|
u8 *rbuf, *key_mic;
|
|
size_t kde_len = 0;
|
|
|
|
#ifdef CONFIG_OCV
|
|
if (wpa_sm_ocv_enabled(sm))
|
|
kde_len = OCV_OCI_KDE_LEN;
|
|
#endif /* CONFIG_OCV */
|
|
|
|
mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
|
|
hdrlen = sizeof(*reply) + mic_len + 2;
|
|
rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
|
|
hdrlen + kde_len, &rlen, (void *) &reply);
|
|
if (rbuf == NULL)
|
|
return -1;
|
|
|
|
reply->type = (sm->proto == WPA_PROTO_RSN ||
|
|
sm->proto == WPA_PROTO_OSEN) ?
|
|
EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
|
|
key_info &= WPA_KEY_INFO_KEY_INDEX_MASK;
|
|
key_info |= ver | WPA_KEY_INFO_SECURE;
|
|
if (mic_len)
|
|
key_info |= WPA_KEY_INFO_MIC;
|
|
else
|
|
key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
|
|
WPA_PUT_BE16(reply->key_info, key_info);
|
|
if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN)
|
|
WPA_PUT_BE16(reply->key_length, 0);
|
|
else
|
|
os_memcpy(reply->key_length, key->key_length, 2);
|
|
os_memcpy(reply->replay_counter, key->replay_counter,
|
|
WPA_REPLAY_COUNTER_LEN);
|
|
|
|
key_mic = (u8 *) (reply + 1);
|
|
WPA_PUT_BE16(key_mic + mic_len, kde_len); /* Key Data Length */
|
|
|
|
#ifdef CONFIG_OCV
|
|
if (wpa_sm_ocv_enabled(sm)) {
|
|
struct wpa_channel_info ci;
|
|
u8 *pos;
|
|
|
|
if (wpa_sm_channel_info(sm, &ci) != 0) {
|
|
wpa_printf(MSG_WARNING,
|
|
"Failed to get channel info for OCI element in EAPOL-Key 2/2");
|
|
os_free(rbuf);
|
|
return -1;
|
|
}
|
|
|
|
pos = key_mic + mic_len + 2; /* Key Data */
|
|
if (ocv_insert_oci_kde(&ci, &pos) < 0) {
|
|
os_free(rbuf);
|
|
return -1;
|
|
}
|
|
}
|
|
#endif /* CONFIG_OCV */
|
|
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2");
|
|
return wpa_eapol_key_send(sm, &sm->ptk, ver, sm->bssid, ETH_P_EAPOL,
|
|
rbuf, rlen, key_mic);
|
|
}
|
|
|
|
|
|
static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm,
|
|
const unsigned char *src_addr,
|
|
const struct wpa_eapol_key *key,
|
|
const u8 *key_data,
|
|
size_t key_data_len, u16 ver)
|
|
{
|
|
u16 key_info;
|
|
int rekey, ret;
|
|
struct wpa_gtk_data gd;
|
|
const u8 *key_rsc;
|
|
|
|
if (!sm->msg_3_of_4_ok && !wpa_fils_is_completed(sm)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: Group Key Handshake started prior to completion of 4-way handshake");
|
|
goto failed;
|
|
}
|
|
|
|
os_memset(&gd, 0, sizeof(gd));
|
|
|
|
rekey = wpa_sm_get_state(sm) == WPA_COMPLETED;
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key "
|
|
"Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
|
|
|
|
key_info = WPA_GET_BE16(key->key_info);
|
|
|
|
if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) {
|
|
ret = wpa_supplicant_process_1_of_2_rsn(sm, key_data,
|
|
key_data_len, key_info,
|
|
&gd);
|
|
} else {
|
|
ret = wpa_supplicant_process_1_of_2_wpa(sm, key, key_data,
|
|
key_data_len,
|
|
key_info, ver, &gd);
|
|
}
|
|
|
|
wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
|
|
|
|
if (ret)
|
|
goto failed;
|
|
|
|
key_rsc = key->key_rsc;
|
|
if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc))
|
|
key_rsc = null_rsc;
|
|
|
|
if (wpa_supplicant_install_gtk(sm, &gd, key_rsc, 0) ||
|
|
wpa_supplicant_send_2_of_2(sm, key, ver, key_info) < 0)
|
|
goto failed;
|
|
forced_memzero(&gd, sizeof(gd));
|
|
|
|
if (rekey) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying "
|
|
"completed with " MACSTR " [GTK=%s]",
|
|
MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher));
|
|
wpa_sm_cancel_auth_timeout(sm);
|
|
wpa_sm_set_state(sm, WPA_COMPLETED);
|
|
} else {
|
|
wpa_supplicant_key_neg_complete(sm, sm->bssid,
|
|
key_info &
|
|
WPA_KEY_INFO_SECURE);
|
|
}
|
|
|
|
wpa_sm_set_rekey_offload(sm);
|
|
|
|
return;
|
|
|
|
failed:
|
|
forced_memzero(&gd, sizeof(gd));
|
|
wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
|
|
}
|
|
|
|
|
|
static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm,
|
|
struct wpa_eapol_key *key,
|
|
u16 ver,
|
|
const u8 *buf, size_t len)
|
|
{
|
|
u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
|
|
int ok = 0;
|
|
size_t mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
|
|
|
|
os_memcpy(mic, key + 1, mic_len);
|
|
if (sm->tptk_set) {
|
|
os_memset(key + 1, 0, mic_len);
|
|
if (wpa_eapol_key_mic(sm->tptk.kck, sm->tptk.kck_len,
|
|
sm->key_mgmt,
|
|
ver, buf, len, (u8 *) (key + 1)) < 0 ||
|
|
os_memcmp_const(mic, key + 1, mic_len) != 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Invalid EAPOL-Key MIC "
|
|
"when using TPTK - ignoring TPTK");
|
|
#ifdef TEST_FUZZ
|
|
wpa_printf(MSG_INFO,
|
|
"TEST: Ignore Key MIC failure for fuzz testing");
|
|
goto continue_fuzz;
|
|
#endif /* TEST_FUZZ */
|
|
} else {
|
|
#ifdef TEST_FUZZ
|
|
continue_fuzz:
|
|
#endif /* TEST_FUZZ */
|
|
ok = 1;
|
|
sm->tptk_set = 0;
|
|
sm->ptk_set = 1;
|
|
os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk));
|
|
os_memset(&sm->tptk, 0, sizeof(sm->tptk));
|
|
/*
|
|
* This assures the same TPTK in sm->tptk can never be
|
|
* copied twice to sm->ptk as the new PTK. In
|
|
* combination with the installed flag in the wpa_ptk
|
|
* struct, this assures the same PTK is only installed
|
|
* once.
|
|
*/
|
|
sm->renew_snonce = 1;
|
|
}
|
|
}
|
|
|
|
if (!ok && sm->ptk_set) {
|
|
os_memset(key + 1, 0, mic_len);
|
|
if (wpa_eapol_key_mic(sm->ptk.kck, sm->ptk.kck_len,
|
|
sm->key_mgmt,
|
|
ver, buf, len, (u8 *) (key + 1)) < 0 ||
|
|
os_memcmp_const(mic, key + 1, mic_len) != 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Invalid EAPOL-Key MIC - "
|
|
"dropping packet");
|
|
#ifdef TEST_FUZZ
|
|
wpa_printf(MSG_INFO,
|
|
"TEST: Ignore Key MIC failure for fuzz testing");
|
|
goto continue_fuzz2;
|
|
#endif /* TEST_FUZZ */
|
|
return -1;
|
|
}
|
|
#ifdef TEST_FUZZ
|
|
continue_fuzz2:
|
|
#endif /* TEST_FUZZ */
|
|
ok = 1;
|
|
}
|
|
|
|
if (!ok) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Could not verify EAPOL-Key MIC - "
|
|
"dropping packet");
|
|
return -1;
|
|
}
|
|
|
|
os_memcpy(sm->rx_replay_counter, key->replay_counter,
|
|
WPA_REPLAY_COUNTER_LEN);
|
|
sm->rx_replay_counter_set = 1;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */
|
|
static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm,
|
|
struct wpa_eapol_key *key,
|
|
size_t mic_len, u16 ver,
|
|
u8 *key_data, size_t *key_data_len)
|
|
{
|
|
wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data",
|
|
key_data, *key_data_len);
|
|
if (!sm->ptk_set) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: PTK not available, cannot decrypt EAPOL-Key Key "
|
|
"Data");
|
|
return -1;
|
|
}
|
|
|
|
/* Decrypt key data here so that this operation does not need
|
|
* to be implemented separately for each message type. */
|
|
if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) {
|
|
#ifdef CONFIG_NO_RC4
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: RC4 not supported in the build");
|
|
return -1;
|
|
#else /* CONFIG_NO_RC4 */
|
|
u8 ek[32];
|
|
|
|
wpa_printf(MSG_DEBUG, "WPA: Decrypt Key Data using RC4");
|
|
os_memcpy(ek, key->key_iv, 16);
|
|
os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len);
|
|
if (rc4_skip(ek, 32, 256, key_data, *key_data_len)) {
|
|
forced_memzero(ek, sizeof(ek));
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
|
|
"WPA: RC4 failed");
|
|
return -1;
|
|
}
|
|
forced_memzero(ek, sizeof(ek));
|
|
#endif /* CONFIG_NO_RC4 */
|
|
} else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
|
|
ver == WPA_KEY_INFO_TYPE_AES_128_CMAC ||
|
|
wpa_use_aes_key_wrap(sm->key_mgmt)) {
|
|
u8 *buf;
|
|
|
|
wpa_printf(MSG_DEBUG,
|
|
"WPA: Decrypt Key Data using AES-UNWRAP (KEK length %u)",
|
|
(unsigned int) sm->ptk.kek_len);
|
|
if (*key_data_len < 8 || *key_data_len % 8) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Unsupported AES-WRAP len %u",
|
|
(unsigned int) *key_data_len);
|
|
return -1;
|
|
}
|
|
*key_data_len -= 8; /* AES-WRAP adds 8 bytes */
|
|
buf = os_malloc(*key_data_len);
|
|
if (buf == NULL) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: No memory for AES-UNWRAP buffer");
|
|
return -1;
|
|
}
|
|
#ifdef TEST_FUZZ
|
|
os_memset(buf, 0x11, *key_data_len);
|
|
#endif /* TEST_FUZZ */
|
|
if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, *key_data_len / 8,
|
|
key_data, buf)) {
|
|
#ifdef TEST_FUZZ
|
|
wpa_printf(MSG_INFO,
|
|
"TEST: Ignore AES unwrap failure for fuzz testing");
|
|
goto continue_fuzz;
|
|
#endif /* TEST_FUZZ */
|
|
bin_clear_free(buf, *key_data_len);
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: AES unwrap failed - "
|
|
"could not decrypt EAPOL-Key key data");
|
|
return -1;
|
|
}
|
|
#ifdef TEST_FUZZ
|
|
continue_fuzz:
|
|
#endif /* TEST_FUZZ */
|
|
os_memcpy(key_data, buf, *key_data_len);
|
|
bin_clear_free(buf, *key_data_len);
|
|
WPA_PUT_BE16(((u8 *) (key + 1)) + mic_len, *key_data_len);
|
|
} else {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Unsupported key_info type %d", ver);
|
|
return -1;
|
|
}
|
|
wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data",
|
|
key_data, *key_data_len);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
*/
|
|
void wpa_sm_aborted_cached(struct wpa_sm *sm)
|
|
{
|
|
if (sm && sm->cur_pmksa) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"RSN: Cancelling PMKSA caching attempt");
|
|
sm->cur_pmksa = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
static void wpa_eapol_key_dump(struct wpa_sm *sm,
|
|
const struct wpa_eapol_key *key,
|
|
unsigned int key_data_len,
|
|
const u8 *mic, unsigned int mic_len)
|
|
{
|
|
#ifndef CONFIG_NO_STDOUT_DEBUG
|
|
u16 key_info = WPA_GET_BE16(key->key_info);
|
|
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type);
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
" key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)",
|
|
key_info, key_info & WPA_KEY_INFO_TYPE_MASK,
|
|
(key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
|
|
WPA_KEY_INFO_KEY_INDEX_SHIFT,
|
|
(key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13,
|
|
key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group",
|
|
key_info & WPA_KEY_INFO_INSTALL ? " Install" : "",
|
|
key_info & WPA_KEY_INFO_ACK ? " Ack" : "",
|
|
key_info & WPA_KEY_INFO_MIC ? " MIC" : "",
|
|
key_info & WPA_KEY_INFO_SECURE ? " Secure" : "",
|
|
key_info & WPA_KEY_INFO_ERROR ? " Error" : "",
|
|
key_info & WPA_KEY_INFO_REQUEST ? " Request" : "",
|
|
key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : "");
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
" key_length=%u key_data_length=%u",
|
|
WPA_GET_BE16(key->key_length), key_data_len);
|
|
wpa_hexdump(MSG_DEBUG, " replay_counter",
|
|
key->replay_counter, WPA_REPLAY_COUNTER_LEN);
|
|
wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN);
|
|
wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16);
|
|
wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8);
|
|
wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8);
|
|
wpa_hexdump(MSG_DEBUG, " key_mic", mic, mic_len);
|
|
#endif /* CONFIG_NO_STDOUT_DEBUG */
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_FILS
|
|
static int wpa_supp_aead_decrypt(struct wpa_sm *sm, u8 *buf, size_t buf_len,
|
|
size_t *key_data_len)
|
|
{
|
|
struct wpa_ptk *ptk;
|
|
struct ieee802_1x_hdr *hdr;
|
|
struct wpa_eapol_key *key;
|
|
u8 *pos, *tmp;
|
|
const u8 *aad[1];
|
|
size_t aad_len[1];
|
|
|
|
if (*key_data_len < AES_BLOCK_SIZE) {
|
|
wpa_printf(MSG_INFO, "No room for AES-SIV data in the frame");
|
|
return -1;
|
|
}
|
|
|
|
if (sm->tptk_set)
|
|
ptk = &sm->tptk;
|
|
else if (sm->ptk_set)
|
|
ptk = &sm->ptk;
|
|
else
|
|
return -1;
|
|
|
|
hdr = (struct ieee802_1x_hdr *) buf;
|
|
key = (struct wpa_eapol_key *) (hdr + 1);
|
|
pos = (u8 *) (key + 1);
|
|
pos += 2; /* Pointing at the Encrypted Key Data field */
|
|
|
|
tmp = os_malloc(*key_data_len);
|
|
if (!tmp)
|
|
return -1;
|
|
|
|
/* AES-SIV AAD from EAPOL protocol version field (inclusive) to
|
|
* to Key Data (exclusive). */
|
|
aad[0] = buf;
|
|
aad_len[0] = pos - buf;
|
|
if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, *key_data_len,
|
|
1, aad, aad_len, tmp) < 0) {
|
|
wpa_printf(MSG_INFO, "Invalid AES-SIV data in the frame");
|
|
bin_clear_free(tmp, *key_data_len);
|
|
return -1;
|
|
}
|
|
|
|
/* AEAD decryption and validation completed successfully */
|
|
(*key_data_len) -= AES_BLOCK_SIZE;
|
|
wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
|
|
tmp, *key_data_len);
|
|
|
|
/* Replace Key Data field with the decrypted version */
|
|
os_memcpy(pos, tmp, *key_data_len);
|
|
pos -= 2; /* Key Data Length field */
|
|
WPA_PUT_BE16(pos, *key_data_len);
|
|
bin_clear_free(tmp, *key_data_len);
|
|
|
|
if (sm->tptk_set) {
|
|
sm->tptk_set = 0;
|
|
sm->ptk_set = 1;
|
|
os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk));
|
|
os_memset(&sm->tptk, 0, sizeof(sm->tptk));
|
|
}
|
|
|
|
os_memcpy(sm->rx_replay_counter, key->replay_counter,
|
|
WPA_REPLAY_COUNTER_LEN);
|
|
sm->rx_replay_counter_set = 1;
|
|
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_FILS */
|
|
|
|
|
|
/**
|
|
* wpa_sm_rx_eapol - Process received WPA EAPOL frames
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @src_addr: Source MAC address of the EAPOL packet
|
|
* @buf: Pointer to the beginning of the EAPOL data (EAPOL header)
|
|
* @len: Length of the EAPOL frame
|
|
* Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure
|
|
*
|
|
* This function is called for each received EAPOL frame. Other than EAPOL-Key
|
|
* frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is
|
|
* only processing WPA and WPA2 EAPOL-Key frames.
|
|
*
|
|
* The received EAPOL-Key packets are validated and valid packets are replied
|
|
* to. In addition, key material (PTK, GTK) is configured at the end of a
|
|
* successful key handshake.
|
|
*/
|
|
int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr,
|
|
const u8 *buf, size_t len)
|
|
{
|
|
size_t plen, data_len, key_data_len;
|
|
const struct ieee802_1x_hdr *hdr;
|
|
struct wpa_eapol_key *key;
|
|
u16 key_info, ver;
|
|
u8 *tmp = NULL;
|
|
int ret = -1;
|
|
u8 *mic, *key_data;
|
|
size_t mic_len, keyhdrlen;
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
sm->ft_completed = 0;
|
|
#endif /* CONFIG_IEEE80211R */
|
|
|
|
mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
|
|
keyhdrlen = sizeof(*key) + mic_len + 2;
|
|
|
|
if (len < sizeof(*hdr) + keyhdrlen) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: EAPOL frame too short to be a WPA "
|
|
"EAPOL-Key (len %lu, expecting at least %lu)",
|
|
(unsigned long) len,
|
|
(unsigned long) sizeof(*hdr) + keyhdrlen);
|
|
return 0;
|
|
}
|
|
|
|
hdr = (const struct ieee802_1x_hdr *) buf;
|
|
plen = be_to_host16(hdr->length);
|
|
data_len = plen + sizeof(*hdr);
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"IEEE 802.1X RX: version=%d type=%d length=%lu",
|
|
hdr->version, hdr->type, (unsigned long) plen);
|
|
|
|
if (hdr->version < EAPOL_VERSION) {
|
|
/* TODO: backwards compatibility */
|
|
}
|
|
if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: EAPOL frame (type %u) discarded, "
|
|
"not a Key frame", hdr->type);
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", buf, len);
|
|
if (plen > len - sizeof(*hdr) || plen < keyhdrlen) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: EAPOL frame payload size %lu "
|
|
"invalid (frame size %lu)",
|
|
(unsigned long) plen, (unsigned long) len);
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
if (data_len < len) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: ignoring %lu bytes after the IEEE 802.1X data",
|
|
(unsigned long) len - data_len);
|
|
}
|
|
|
|
/*
|
|
* Make a copy of the frame since we need to modify the buffer during
|
|
* MAC validation and Key Data decryption.
|
|
*/
|
|
tmp = os_memdup(buf, data_len);
|
|
if (tmp == NULL)
|
|
goto out;
|
|
key = (struct wpa_eapol_key *) (tmp + sizeof(struct ieee802_1x_hdr));
|
|
mic = (u8 *) (key + 1);
|
|
key_data = mic + mic_len + 2;
|
|
|
|
if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN)
|
|
{
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: EAPOL-Key type (%d) unknown, discarded",
|
|
key->type);
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
key_data_len = WPA_GET_BE16(mic + mic_len);
|
|
wpa_eapol_key_dump(sm, key, key_data_len, mic, mic_len);
|
|
|
|
if (key_data_len > plen - keyhdrlen) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key "
|
|
"frame - key_data overflow (%u > %u)",
|
|
(unsigned int) key_data_len,
|
|
(unsigned int) (plen - keyhdrlen));
|
|
goto out;
|
|
}
|
|
|
|
eapol_sm_notify_lower_layer_success(sm->eapol, 0);
|
|
key_info = WPA_GET_BE16(key->key_info);
|
|
ver = key_info & WPA_KEY_INFO_TYPE_MASK;
|
|
if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 &&
|
|
ver != WPA_KEY_INFO_TYPE_AES_128_CMAC &&
|
|
ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES &&
|
|
!wpa_use_akm_defined(sm->key_mgmt)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: Unsupported EAPOL-Key descriptor version %d",
|
|
ver);
|
|
goto out;
|
|
}
|
|
|
|
if (wpa_use_akm_defined(sm->key_mgmt) &&
|
|
ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"RSN: Unsupported EAPOL-Key descriptor version %d (expected AKM defined = 0)",
|
|
ver);
|
|
goto out;
|
|
}
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
if (wpa_key_mgmt_ft(sm->key_mgmt)) {
|
|
/* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */
|
|
if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC &&
|
|
!wpa_use_akm_defined(sm->key_mgmt)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"FT: AP did not use AES-128-CMAC");
|
|
goto out;
|
|
}
|
|
} else
|
|
#endif /* CONFIG_IEEE80211R */
|
|
if (wpa_key_mgmt_sha256(sm->key_mgmt)) {
|
|
if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC &&
|
|
!wpa_use_akm_defined(sm->key_mgmt)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: AP did not use the "
|
|
"negotiated AES-128-CMAC");
|
|
goto out;
|
|
}
|
|
} else if (sm->pairwise_cipher == WPA_CIPHER_CCMP &&
|
|
!wpa_use_akm_defined(sm->key_mgmt) &&
|
|
ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: CCMP is used, but EAPOL-Key "
|
|
"descriptor version (%d) is not 2", ver);
|
|
if (sm->group_cipher != WPA_CIPHER_CCMP &&
|
|
!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
|
|
/* Earlier versions of IEEE 802.11i did not explicitly
|
|
* require version 2 descriptor for all EAPOL-Key
|
|
* packets, so allow group keys to use version 1 if
|
|
* CCMP is not used for them. */
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: Backwards compatibility: allow invalid "
|
|
"version for non-CCMP group keys");
|
|
} else if (ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: Interoperability workaround: allow incorrect (should have been HMAC-SHA1), but stronger (is AES-128-CMAC), descriptor version to be used");
|
|
} else
|
|
goto out;
|
|
} else if (sm->pairwise_cipher == WPA_CIPHER_GCMP &&
|
|
!wpa_use_akm_defined(sm->key_mgmt) &&
|
|
ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: GCMP is used, but EAPOL-Key "
|
|
"descriptor version (%d) is not 2", ver);
|
|
goto out;
|
|
}
|
|
|
|
if (sm->rx_replay_counter_set &&
|
|
os_memcmp(key->replay_counter, sm->rx_replay_counter,
|
|
WPA_REPLAY_COUNTER_LEN) <= 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: EAPOL-Key Replay Counter did not increase - "
|
|
"dropping packet");
|
|
goto out;
|
|
}
|
|
|
|
if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: Unsupported SMK bit in key_info");
|
|
goto out;
|
|
}
|
|
|
|
if (!(key_info & WPA_KEY_INFO_ACK)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: No Ack bit in key_info");
|
|
goto out;
|
|
}
|
|
|
|
if (key_info & WPA_KEY_INFO_REQUEST) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"WPA: EAPOL-Key with Request bit - dropped");
|
|
goto out;
|
|
}
|
|
|
|
if ((key_info & WPA_KEY_INFO_MIC) &&
|
|
wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len))
|
|
goto out;
|
|
|
|
#ifdef CONFIG_FILS
|
|
if (!mic_len && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
|
|
if (wpa_supp_aead_decrypt(sm, tmp, data_len, &key_data_len))
|
|
goto out;
|
|
}
|
|
#endif /* CONFIG_FILS */
|
|
|
|
if ((sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) &&
|
|
(key_info & WPA_KEY_INFO_ENCR_KEY_DATA) && mic_len) {
|
|
/*
|
|
* Only decrypt the Key Data field if the frame's authenticity
|
|
* was verified. When using AES-SIV (FILS), the MIC flag is not
|
|
* set, so this check should only be performed if mic_len != 0
|
|
* which is the case in this code branch.
|
|
*/
|
|
if (!(key_info & WPA_KEY_INFO_MIC)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Ignore EAPOL-Key with encrypted but unauthenticated data");
|
|
goto out;
|
|
}
|
|
if (wpa_supplicant_decrypt_key_data(sm, key, mic_len,
|
|
ver, key_data,
|
|
&key_data_len))
|
|
goto out;
|
|
}
|
|
|
|
if (key_info & WPA_KEY_INFO_KEY_TYPE) {
|
|
if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: Ignored EAPOL-Key (Pairwise) with "
|
|
"non-zero key index");
|
|
goto out;
|
|
}
|
|
if (key_info & (WPA_KEY_INFO_MIC |
|
|
WPA_KEY_INFO_ENCR_KEY_DATA)) {
|
|
/* 3/4 4-Way Handshake */
|
|
wpa_supplicant_process_3_of_4(sm, key, ver, key_data,
|
|
key_data_len);
|
|
} else {
|
|
/* 1/4 4-Way Handshake */
|
|
wpa_supplicant_process_1_of_4(sm, src_addr, key,
|
|
ver, key_data,
|
|
key_data_len);
|
|
}
|
|
} else {
|
|
if ((mic_len && (key_info & WPA_KEY_INFO_MIC)) ||
|
|
(!mic_len && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA))) {
|
|
/* 1/2 Group Key Handshake */
|
|
wpa_supplicant_process_1_of_2(sm, src_addr, key,
|
|
key_data, key_data_len,
|
|
ver);
|
|
} else {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"WPA: EAPOL-Key (Group) without Mic/Encr bit - "
|
|
"dropped");
|
|
}
|
|
}
|
|
|
|
ret = 1;
|
|
|
|
out:
|
|
bin_clear_free(tmp, data_len);
|
|
return ret;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_CTRL_IFACE
|
|
static u32 wpa_key_mgmt_suite(struct wpa_sm *sm)
|
|
{
|
|
switch (sm->key_mgmt) {
|
|
case WPA_KEY_MGMT_IEEE8021X:
|
|
return ((sm->proto == WPA_PROTO_RSN ||
|
|
sm->proto == WPA_PROTO_OSEN) ?
|
|
RSN_AUTH_KEY_MGMT_UNSPEC_802_1X :
|
|
WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
|
|
case WPA_KEY_MGMT_PSK:
|
|
return (sm->proto == WPA_PROTO_RSN ?
|
|
RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X :
|
|
WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
|
|
#ifdef CONFIG_IEEE80211R
|
|
case WPA_KEY_MGMT_FT_IEEE8021X:
|
|
return RSN_AUTH_KEY_MGMT_FT_802_1X;
|
|
case WPA_KEY_MGMT_FT_PSK:
|
|
return RSN_AUTH_KEY_MGMT_FT_PSK;
|
|
#endif /* CONFIG_IEEE80211R */
|
|
case WPA_KEY_MGMT_IEEE8021X_SHA256:
|
|
return RSN_AUTH_KEY_MGMT_802_1X_SHA256;
|
|
case WPA_KEY_MGMT_PSK_SHA256:
|
|
return RSN_AUTH_KEY_MGMT_PSK_SHA256;
|
|
case WPA_KEY_MGMT_CCKM:
|
|
return (sm->proto == WPA_PROTO_RSN ?
|
|
RSN_AUTH_KEY_MGMT_CCKM:
|
|
WPA_AUTH_KEY_MGMT_CCKM);
|
|
case WPA_KEY_MGMT_WPA_NONE:
|
|
return WPA_AUTH_KEY_MGMT_NONE;
|
|
case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
|
|
return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B;
|
|
case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
|
|
return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
|
|
#define RSN_SUITE "%02x-%02x-%02x-%d"
|
|
#define RSN_SUITE_ARG(s) \
|
|
((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
|
|
|
|
/**
|
|
* wpa_sm_get_mib - Dump text list of MIB entries
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @buf: Buffer for the list
|
|
* @buflen: Length of the buffer
|
|
* Returns: Number of bytes written to buffer
|
|
*
|
|
* This function is used fetch dot11 MIB variables.
|
|
*/
|
|
int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen)
|
|
{
|
|
char pmkid_txt[PMKID_LEN * 2 + 1];
|
|
int rsna, ret;
|
|
size_t len;
|
|
|
|
if (sm->cur_pmksa) {
|
|
wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
|
|
sm->cur_pmksa->pmkid, PMKID_LEN);
|
|
} else
|
|
pmkid_txt[0] = '\0';
|
|
|
|
if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) ||
|
|
wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) &&
|
|
sm->proto == WPA_PROTO_RSN)
|
|
rsna = 1;
|
|
else
|
|
rsna = 0;
|
|
|
|
ret = os_snprintf(buf, buflen,
|
|
"dot11RSNAOptionImplemented=TRUE\n"
|
|
"dot11RSNAPreauthenticationImplemented=TRUE\n"
|
|
"dot11RSNAEnabled=%s\n"
|
|
"dot11RSNAPreauthenticationEnabled=%s\n"
|
|
"dot11RSNAConfigVersion=%d\n"
|
|
"dot11RSNAConfigPairwiseKeysSupported=5\n"
|
|
"dot11RSNAConfigGroupCipherSize=%d\n"
|
|
"dot11RSNAConfigPMKLifetime=%d\n"
|
|
"dot11RSNAConfigPMKReauthThreshold=%d\n"
|
|
"dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n"
|
|
"dot11RSNAConfigSATimeout=%d\n",
|
|
rsna ? "TRUE" : "FALSE",
|
|
rsna ? "TRUE" : "FALSE",
|
|
RSN_VERSION,
|
|
wpa_cipher_key_len(sm->group_cipher) * 8,
|
|
sm->dot11RSNAConfigPMKLifetime,
|
|
sm->dot11RSNAConfigPMKReauthThreshold,
|
|
sm->dot11RSNAConfigSATimeout);
|
|
if (os_snprintf_error(buflen, ret))
|
|
return 0;
|
|
len = ret;
|
|
|
|
ret = os_snprintf(
|
|
buf + len, buflen - len,
|
|
"dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
|
|
"dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
|
|
"dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
|
|
"dot11RSNAPMKIDUsed=%s\n"
|
|
"dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
|
|
"dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
|
|
"dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
|
|
"dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n"
|
|
"dot11RSNA4WayHandshakeFailures=%u\n",
|
|
RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
|
|
RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto,
|
|
sm->pairwise_cipher)),
|
|
RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto,
|
|
sm->group_cipher)),
|
|
pmkid_txt,
|
|
RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
|
|
RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto,
|
|
sm->pairwise_cipher)),
|
|
RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto,
|
|
sm->group_cipher)),
|
|
sm->dot11RSNA4WayHandshakeFailures);
|
|
if (!os_snprintf_error(buflen - len, ret))
|
|
len += ret;
|
|
|
|
return (int) len;
|
|
}
|
|
#endif /* CONFIG_CTRL_IFACE */
|
|
|
|
|
|
static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
|
|
void *ctx, enum pmksa_free_reason reason)
|
|
{
|
|
struct wpa_sm *sm = ctx;
|
|
int deauth = 0;
|
|
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: "
|
|
MACSTR " reason=%d", MAC2STR(entry->aa), reason);
|
|
|
|
if (sm->cur_pmksa == entry) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"RSN: %s current PMKSA entry",
|
|
reason == PMKSA_REPLACE ? "replaced" : "removed");
|
|
pmksa_cache_clear_current(sm);
|
|
|
|
/*
|
|
* If an entry is simply being replaced, there's no need to
|
|
* deauthenticate because it will be immediately re-added.
|
|
* This happens when EAP authentication is completed again
|
|
* (reauth or failed PMKSA caching attempt).
|
|
*/
|
|
if (reason != PMKSA_REPLACE)
|
|
deauth = 1;
|
|
}
|
|
|
|
if (reason == PMKSA_EXPIRE &&
|
|
(sm->pmk_len == entry->pmk_len &&
|
|
os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"RSN: deauthenticating due to expired PMK");
|
|
pmksa_cache_clear_current(sm);
|
|
deauth = 1;
|
|
}
|
|
|
|
if (deauth) {
|
|
sm->pmk_len = 0;
|
|
os_memset(sm->pmk, 0, sizeof(sm->pmk));
|
|
wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_init - Initialize WPA state machine
|
|
* @ctx: Context pointer for callbacks; this needs to be an allocated buffer
|
|
* Returns: Pointer to the allocated WPA state machine data
|
|
*
|
|
* This function is used to allocate a new WPA state machine and the returned
|
|
* value is passed to all WPA state machine calls.
|
|
*/
|
|
struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx)
|
|
{
|
|
struct wpa_sm *sm;
|
|
|
|
sm = os_zalloc(sizeof(*sm));
|
|
if (sm == NULL)
|
|
return NULL;
|
|
dl_list_init(&sm->pmksa_candidates);
|
|
sm->renew_snonce = 1;
|
|
sm->ctx = ctx;
|
|
|
|
sm->dot11RSNAConfigPMKLifetime = 43200;
|
|
sm->dot11RSNAConfigPMKReauthThreshold = 70;
|
|
sm->dot11RSNAConfigSATimeout = 60;
|
|
|
|
sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm);
|
|
if (sm->pmksa == NULL) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
|
|
"RSN: PMKSA cache initialization failed");
|
|
os_free(sm);
|
|
return NULL;
|
|
}
|
|
|
|
return sm;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_deinit - Deinitialize WPA state machine
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
*/
|
|
void wpa_sm_deinit(struct wpa_sm *sm)
|
|
{
|
|
if (sm == NULL)
|
|
return;
|
|
pmksa_cache_deinit(sm->pmksa);
|
|
eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL);
|
|
eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
|
|
os_free(sm->assoc_wpa_ie);
|
|
os_free(sm->assoc_rsnxe);
|
|
os_free(sm->ap_wpa_ie);
|
|
os_free(sm->ap_rsn_ie);
|
|
os_free(sm->ap_rsnxe);
|
|
wpa_sm_drop_sa(sm);
|
|
os_free(sm->ctx);
|
|
#ifdef CONFIG_IEEE80211R
|
|
os_free(sm->assoc_resp_ies);
|
|
#endif /* CONFIG_IEEE80211R */
|
|
#ifdef CONFIG_TESTING_OPTIONS
|
|
wpabuf_free(sm->test_assoc_ie);
|
|
#endif /* CONFIG_TESTING_OPTIONS */
|
|
#ifdef CONFIG_FILS_SK_PFS
|
|
crypto_ecdh_deinit(sm->fils_ecdh);
|
|
#endif /* CONFIG_FILS_SK_PFS */
|
|
#ifdef CONFIG_FILS
|
|
wpabuf_free(sm->fils_ft_ies);
|
|
#endif /* CONFIG_FILS */
|
|
#ifdef CONFIG_OWE
|
|
crypto_ecdh_deinit(sm->owe_ecdh);
|
|
#endif /* CONFIG_OWE */
|
|
#ifdef CONFIG_DPP2
|
|
wpabuf_clear_free(sm->dpp_z);
|
|
#endif /* CONFIG_DPP2 */
|
|
os_free(sm);
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_notify_assoc - Notify WPA state machine about association
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @bssid: The BSSID of the new association
|
|
*
|
|
* This function is called to let WPA state machine know that the connection
|
|
* was established.
|
|
*/
|
|
void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
|
|
{
|
|
int clear_keys = 1;
|
|
|
|
if (sm == NULL)
|
|
return;
|
|
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: Association event - clear replay counter");
|
|
os_memcpy(sm->bssid, bssid, ETH_ALEN);
|
|
os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
|
|
sm->rx_replay_counter_set = 0;
|
|
sm->renew_snonce = 1;
|
|
if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0)
|
|
rsn_preauth_deinit(sm);
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
if (wpa_ft_is_completed(sm)) {
|
|
/*
|
|
* Clear portValid to kick EAPOL state machine to re-enter
|
|
* AUTHENTICATED state to get the EAPOL port Authorized.
|
|
*/
|
|
eapol_sm_notify_portValid(sm->eapol, FALSE);
|
|
wpa_supplicant_key_neg_complete(sm, sm->bssid, 1);
|
|
|
|
/* Prepare for the next transition */
|
|
wpa_ft_prepare_auth_request(sm, NULL);
|
|
|
|
clear_keys = 0;
|
|
sm->ft_protocol = 1;
|
|
} else {
|
|
sm->ft_protocol = 0;
|
|
}
|
|
#endif /* CONFIG_IEEE80211R */
|
|
#ifdef CONFIG_FILS
|
|
if (sm->fils_completed) {
|
|
/*
|
|
* Clear portValid to kick EAPOL state machine to re-enter
|
|
* AUTHENTICATED state to get the EAPOL port Authorized.
|
|
*/
|
|
wpa_supplicant_key_neg_complete(sm, sm->bssid, 1);
|
|
clear_keys = 0;
|
|
}
|
|
#endif /* CONFIG_FILS */
|
|
|
|
if (clear_keys) {
|
|
/*
|
|
* IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if
|
|
* this is not part of a Fast BSS Transition.
|
|
*/
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK");
|
|
sm->ptk_set = 0;
|
|
os_memset(&sm->ptk, 0, sizeof(sm->ptk));
|
|
sm->tptk_set = 0;
|
|
os_memset(&sm->tptk, 0, sizeof(sm->tptk));
|
|
os_memset(&sm->gtk, 0, sizeof(sm->gtk));
|
|
os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep));
|
|
os_memset(&sm->igtk, 0, sizeof(sm->igtk));
|
|
os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep));
|
|
}
|
|
|
|
#ifdef CONFIG_TDLS
|
|
wpa_tdls_assoc(sm);
|
|
#endif /* CONFIG_TDLS */
|
|
|
|
#ifdef CONFIG_P2P
|
|
os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr));
|
|
#endif /* CONFIG_P2P */
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_notify_disassoc - Notify WPA state machine about disassociation
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
*
|
|
* This function is called to let WPA state machine know that the connection
|
|
* was lost. This will abort any existing pre-authentication session.
|
|
*/
|
|
void wpa_sm_notify_disassoc(struct wpa_sm *sm)
|
|
{
|
|
eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL);
|
|
eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
|
|
rsn_preauth_deinit(sm);
|
|
pmksa_cache_clear_current(sm);
|
|
if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE)
|
|
sm->dot11RSNA4WayHandshakeFailures++;
|
|
#ifdef CONFIG_TDLS
|
|
wpa_tdls_disassoc(sm);
|
|
#endif /* CONFIG_TDLS */
|
|
#ifdef CONFIG_FILS
|
|
sm->fils_completed = 0;
|
|
#endif /* CONFIG_FILS */
|
|
#ifdef CONFIG_IEEE80211R
|
|
sm->ft_reassoc_completed = 0;
|
|
sm->ft_protocol = 0;
|
|
#endif /* CONFIG_IEEE80211R */
|
|
|
|
/* Keys are not needed in the WPA state machine anymore */
|
|
wpa_sm_drop_sa(sm);
|
|
|
|
sm->msg_3_of_4_ok = 0;
|
|
os_memset(sm->bssid, 0, ETH_ALEN);
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_pmk - Set PMK
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @pmk: The new PMK
|
|
* @pmk_len: The length of the new PMK in bytes
|
|
* @pmkid: Calculated PMKID
|
|
* @bssid: AA to add into PMKSA cache or %NULL to not cache the PMK
|
|
*
|
|
* Configure the PMK for WPA state machine.
|
|
*/
|
|
void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len,
|
|
const u8 *pmkid, const u8 *bssid)
|
|
{
|
|
if (sm == NULL)
|
|
return;
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "WPA: Set PMK based on external data",
|
|
pmk, pmk_len);
|
|
sm->pmk_len = pmk_len;
|
|
os_memcpy(sm->pmk, pmk, pmk_len);
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
/* Set XXKey to be PSK for FT key derivation */
|
|
sm->xxkey_len = pmk_len;
|
|
os_memcpy(sm->xxkey, pmk, pmk_len);
|
|
#endif /* CONFIG_IEEE80211R */
|
|
|
|
if (bssid) {
|
|
pmksa_cache_add(sm->pmksa, pmk, pmk_len, pmkid, NULL, 0,
|
|
bssid, sm->own_addr,
|
|
sm->network_ctx, sm->key_mgmt, NULL);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
*
|
|
* Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK
|
|
* will be cleared.
|
|
*/
|
|
void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm)
|
|
{
|
|
if (sm == NULL)
|
|
return;
|
|
|
|
if (sm->cur_pmksa) {
|
|
wpa_hexdump_key(MSG_DEBUG,
|
|
"WPA: Set PMK based on current PMKSA",
|
|
sm->cur_pmksa->pmk, sm->cur_pmksa->pmk_len);
|
|
sm->pmk_len = sm->cur_pmksa->pmk_len;
|
|
os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len);
|
|
} else {
|
|
wpa_printf(MSG_DEBUG, "WPA: No current PMKSA - clear PMK");
|
|
sm->pmk_len = 0;
|
|
os_memset(sm->pmk, 0, PMK_LEN_MAX);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @fast_reauth: Whether fast reauthentication (EAP) is allowed
|
|
*/
|
|
void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth)
|
|
{
|
|
if (sm)
|
|
sm->fast_reauth = fast_reauth;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @scard_ctx: Context pointer for smartcard related callback functions
|
|
*/
|
|
void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx)
|
|
{
|
|
if (sm == NULL)
|
|
return;
|
|
sm->scard_ctx = scard_ctx;
|
|
if (sm->preauth_eapol)
|
|
eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx);
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_config - Notification of current configuration change
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @config: Pointer to current network configuration
|
|
*
|
|
* Notify WPA state machine that configuration has changed. config will be
|
|
* stored as a backpointer to network configuration. This can be %NULL to clear
|
|
* the stored pointed.
|
|
*/
|
|
void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config)
|
|
{
|
|
if (!sm)
|
|
return;
|
|
|
|
if (config) {
|
|
sm->network_ctx = config->network_ctx;
|
|
sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher;
|
|
sm->proactive_key_caching = config->proactive_key_caching;
|
|
sm->eap_workaround = config->eap_workaround;
|
|
sm->eap_conf_ctx = config->eap_conf_ctx;
|
|
if (config->ssid) {
|
|
os_memcpy(sm->ssid, config->ssid, config->ssid_len);
|
|
sm->ssid_len = config->ssid_len;
|
|
} else
|
|
sm->ssid_len = 0;
|
|
sm->wpa_ptk_rekey = config->wpa_ptk_rekey;
|
|
sm->p2p = config->p2p;
|
|
sm->wpa_rsc_relaxation = config->wpa_rsc_relaxation;
|
|
sm->owe_ptk_workaround = config->owe_ptk_workaround;
|
|
#ifdef CONFIG_FILS
|
|
if (config->fils_cache_id) {
|
|
sm->fils_cache_id_set = 1;
|
|
os_memcpy(sm->fils_cache_id, config->fils_cache_id,
|
|
FILS_CACHE_ID_LEN);
|
|
} else {
|
|
sm->fils_cache_id_set = 0;
|
|
}
|
|
sm->beacon_prot = config->beacon_prot;
|
|
#endif /* CONFIG_FILS */
|
|
} else {
|
|
sm->network_ctx = NULL;
|
|
sm->allowed_pairwise_cipher = 0;
|
|
sm->proactive_key_caching = 0;
|
|
sm->eap_workaround = 0;
|
|
sm->eap_conf_ctx = NULL;
|
|
sm->ssid_len = 0;
|
|
sm->wpa_ptk_rekey = 0;
|
|
sm->p2p = 0;
|
|
sm->wpa_rsc_relaxation = 0;
|
|
sm->owe_ptk_workaround = 0;
|
|
sm->beacon_prot = 0;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_own_addr - Set own MAC address
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @addr: Own MAC address
|
|
*/
|
|
void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr)
|
|
{
|
|
if (sm)
|
|
os_memcpy(sm->own_addr, addr, ETH_ALEN);
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_ifname - Set network interface name
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @ifname: Interface name
|
|
* @bridge_ifname: Optional bridge interface name (for pre-auth)
|
|
*/
|
|
void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname,
|
|
const char *bridge_ifname)
|
|
{
|
|
if (sm) {
|
|
sm->ifname = ifname;
|
|
sm->bridge_ifname = bridge_ifname;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_eapol - Set EAPOL state machine pointer
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init()
|
|
*/
|
|
void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol)
|
|
{
|
|
if (sm)
|
|
sm->eapol = eapol;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_param - Set WPA state machine parameters
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @param: Parameter field
|
|
* @value: Parameter value
|
|
* Returns: 0 on success, -1 on failure
|
|
*/
|
|
int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param,
|
|
unsigned int value)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (sm == NULL)
|
|
return -1;
|
|
|
|
switch (param) {
|
|
case RSNA_PMK_LIFETIME:
|
|
if (value > 0)
|
|
sm->dot11RSNAConfigPMKLifetime = value;
|
|
else
|
|
ret = -1;
|
|
break;
|
|
case RSNA_PMK_REAUTH_THRESHOLD:
|
|
if (value > 0 && value <= 100)
|
|
sm->dot11RSNAConfigPMKReauthThreshold = value;
|
|
else
|
|
ret = -1;
|
|
break;
|
|
case RSNA_SA_TIMEOUT:
|
|
if (value > 0)
|
|
sm->dot11RSNAConfigSATimeout = value;
|
|
else
|
|
ret = -1;
|
|
break;
|
|
case WPA_PARAM_PROTO:
|
|
sm->proto = value;
|
|
break;
|
|
case WPA_PARAM_PAIRWISE:
|
|
sm->pairwise_cipher = value;
|
|
break;
|
|
case WPA_PARAM_GROUP:
|
|
sm->group_cipher = value;
|
|
break;
|
|
case WPA_PARAM_KEY_MGMT:
|
|
sm->key_mgmt = value;
|
|
break;
|
|
case WPA_PARAM_MGMT_GROUP:
|
|
sm->mgmt_group_cipher = value;
|
|
break;
|
|
case WPA_PARAM_RSN_ENABLED:
|
|
sm->rsn_enabled = value;
|
|
break;
|
|
case WPA_PARAM_MFP:
|
|
sm->mfp = value;
|
|
break;
|
|
case WPA_PARAM_OCV:
|
|
sm->ocv = value;
|
|
break;
|
|
case WPA_PARAM_SAE_PWE:
|
|
sm->sae_pwe = value;
|
|
break;
|
|
case WPA_PARAM_DENY_PTK0_REKEY:
|
|
sm->wpa_deny_ptk0_rekey = value;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_get_status - Get WPA state machine
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @buf: Buffer for status information
|
|
* @buflen: Maximum buffer length
|
|
* @verbose: Whether to include verbose status information
|
|
* Returns: Number of bytes written to buf.
|
|
*
|
|
* Query WPA state machine for status information. This function fills in
|
|
* a text area with current status information. If the buffer (buf) is not
|
|
* large enough, status information will be truncated to fit the buffer.
|
|
*/
|
|
int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen,
|
|
int verbose)
|
|
{
|
|
char *pos = buf, *end = buf + buflen;
|
|
int ret;
|
|
|
|
ret = os_snprintf(pos, end - pos,
|
|
"pairwise_cipher=%s\n"
|
|
"group_cipher=%s\n"
|
|
"key_mgmt=%s\n",
|
|
wpa_cipher_txt(sm->pairwise_cipher),
|
|
wpa_cipher_txt(sm->group_cipher),
|
|
wpa_key_mgmt_txt(sm->key_mgmt, sm->proto));
|
|
if (os_snprintf_error(end - pos, ret))
|
|
return pos - buf;
|
|
pos += ret;
|
|
|
|
if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) {
|
|
struct wpa_ie_data rsn;
|
|
if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn)
|
|
>= 0 &&
|
|
rsn.capabilities & (WPA_CAPABILITY_MFPR |
|
|
WPA_CAPABILITY_MFPC)) {
|
|
ret = os_snprintf(pos, end - pos, "pmf=%d\n"
|
|
"mgmt_group_cipher=%s\n",
|
|
(rsn.capabilities &
|
|
WPA_CAPABILITY_MFPR) ? 2 : 1,
|
|
wpa_cipher_txt(
|
|
sm->mgmt_group_cipher));
|
|
if (os_snprintf_error(end - pos, ret))
|
|
return pos - buf;
|
|
pos += ret;
|
|
}
|
|
}
|
|
|
|
return pos - buf;
|
|
}
|
|
|
|
|
|
int wpa_sm_pmf_enabled(struct wpa_sm *sm)
|
|
{
|
|
struct wpa_ie_data rsn;
|
|
|
|
if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie)
|
|
return 0;
|
|
|
|
if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 &&
|
|
rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int wpa_sm_ocv_enabled(struct wpa_sm *sm)
|
|
{
|
|
struct wpa_ie_data rsn;
|
|
|
|
if (!sm->ocv || !sm->ap_rsn_ie)
|
|
return 0;
|
|
|
|
return wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len,
|
|
&rsn) >= 0 &&
|
|
(rsn.capabilities & WPA_CAPABILITY_OCVC);
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @wpa_ie: Pointer to buffer for WPA/RSN IE
|
|
* @wpa_ie_len: Pointer to the length of the wpa_ie buffer
|
|
* Returns: 0 on success, -1 on failure
|
|
*/
|
|
int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie,
|
|
size_t *wpa_ie_len)
|
|
{
|
|
int res;
|
|
|
|
if (sm == NULL)
|
|
return -1;
|
|
|
|
#ifdef CONFIG_TESTING_OPTIONS
|
|
if (sm->test_assoc_ie) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"TESTING: Replace association WPA/RSN IE");
|
|
if (*wpa_ie_len < wpabuf_len(sm->test_assoc_ie))
|
|
return -1;
|
|
os_memcpy(wpa_ie, wpabuf_head(sm->test_assoc_ie),
|
|
wpabuf_len(sm->test_assoc_ie));
|
|
res = wpabuf_len(sm->test_assoc_ie);
|
|
} else
|
|
#endif /* CONFIG_TESTING_OPTIONS */
|
|
res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len);
|
|
if (res < 0)
|
|
return -1;
|
|
*wpa_ie_len = res;
|
|
|
|
wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default",
|
|
wpa_ie, *wpa_ie_len);
|
|
|
|
if (sm->assoc_wpa_ie == NULL) {
|
|
/*
|
|
* Make a copy of the WPA/RSN IE so that 4-Way Handshake gets
|
|
* the correct version of the IE even if PMKSA caching is
|
|
* aborted (which would remove PMKID from IE generation).
|
|
*/
|
|
sm->assoc_wpa_ie = os_memdup(wpa_ie, *wpa_ie_len);
|
|
if (sm->assoc_wpa_ie == NULL)
|
|
return -1;
|
|
|
|
sm->assoc_wpa_ie_len = *wpa_ie_len;
|
|
} else {
|
|
wpa_hexdump(MSG_DEBUG,
|
|
"WPA: Leave previously set WPA IE default",
|
|
sm->assoc_wpa_ie, sm->assoc_wpa_ie_len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @ie: Pointer to IE data (starting from id)
|
|
* @len: IE length
|
|
* Returns: 0 on success, -1 on failure
|
|
*
|
|
* Inform WPA state machine about the WPA/RSN IE used in (Re)Association
|
|
* Request frame. The IE will be used to override the default value generated
|
|
* with wpa_sm_set_assoc_wpa_ie_default().
|
|
*/
|
|
int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
|
|
{
|
|
if (sm == NULL)
|
|
return -1;
|
|
|
|
os_free(sm->assoc_wpa_ie);
|
|
if (ie == NULL || len == 0) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: clearing own WPA/RSN IE");
|
|
sm->assoc_wpa_ie = NULL;
|
|
sm->assoc_wpa_ie_len = 0;
|
|
} else {
|
|
wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len);
|
|
sm->assoc_wpa_ie = os_memdup(ie, len);
|
|
if (sm->assoc_wpa_ie == NULL)
|
|
return -1;
|
|
|
|
sm->assoc_wpa_ie_len = len;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_assoc_rsnxe_default - Generate own RSNXE from configuration
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @rsnxe: Pointer to buffer for RSNXE
|
|
* @rsnxe_len: Pointer to the length of the rsne buffer
|
|
* Returns: 0 on success, -1 on failure
|
|
*/
|
|
int wpa_sm_set_assoc_rsnxe_default(struct wpa_sm *sm, u8 *rsnxe,
|
|
size_t *rsnxe_len)
|
|
{
|
|
int res;
|
|
|
|
if (!sm)
|
|
return -1;
|
|
|
|
res = wpa_gen_rsnxe(sm, rsnxe, *rsnxe_len);
|
|
if (res < 0)
|
|
return -1;
|
|
*rsnxe_len = res;
|
|
|
|
wpa_hexdump(MSG_DEBUG, "RSN: Set own RSNXE default", rsnxe, *rsnxe_len);
|
|
|
|
if (sm->assoc_rsnxe) {
|
|
wpa_hexdump(MSG_DEBUG,
|
|
"RSN: Leave previously set RSNXE default",
|
|
sm->assoc_rsnxe, sm->assoc_rsnxe_len);
|
|
} else if (*rsnxe_len > 0) {
|
|
/*
|
|
* Make a copy of the RSNXE so that 4-Way Handshake gets the
|
|
* correct version of the IE even if it gets changed.
|
|
*/
|
|
sm->assoc_rsnxe = os_memdup(rsnxe, *rsnxe_len);
|
|
if (!sm->assoc_rsnxe)
|
|
return -1;
|
|
|
|
sm->assoc_rsnxe_len = *rsnxe_len;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_assoc_rsnxe - Set own RSNXE from (Re)AssocReq
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @ie: Pointer to IE data (starting from id)
|
|
* @len: IE length
|
|
* Returns: 0 on success, -1 on failure
|
|
*
|
|
* Inform WPA state machine about the RSNXE used in (Re)Association Request
|
|
* frame. The IE will be used to override the default value generated
|
|
* with wpa_sm_set_assoc_rsnxe_default().
|
|
*/
|
|
int wpa_sm_set_assoc_rsnxe(struct wpa_sm *sm, const u8 *ie, size_t len)
|
|
{
|
|
if (!sm)
|
|
return -1;
|
|
|
|
os_free(sm->assoc_rsnxe);
|
|
if (!ie || len == 0) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"RSN: clearing own RSNXE");
|
|
sm->assoc_rsnxe = NULL;
|
|
sm->assoc_rsnxe_len = 0;
|
|
} else {
|
|
wpa_hexdump(MSG_DEBUG, "RSN: set own RSNXE", ie, len);
|
|
sm->assoc_rsnxe = os_memdup(ie, len);
|
|
if (!sm->assoc_rsnxe)
|
|
return -1;
|
|
|
|
sm->assoc_rsnxe_len = len;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @ie: Pointer to IE data (starting from id)
|
|
* @len: IE length
|
|
* Returns: 0 on success, -1 on failure
|
|
*
|
|
* Inform WPA state machine about the WPA IE used in Beacon / Probe Response
|
|
* frame.
|
|
*/
|
|
int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
|
|
{
|
|
if (sm == NULL)
|
|
return -1;
|
|
|
|
os_free(sm->ap_wpa_ie);
|
|
if (ie == NULL || len == 0) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: clearing AP WPA IE");
|
|
sm->ap_wpa_ie = NULL;
|
|
sm->ap_wpa_ie_len = 0;
|
|
} else {
|
|
wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len);
|
|
sm->ap_wpa_ie = os_memdup(ie, len);
|
|
if (sm->ap_wpa_ie == NULL)
|
|
return -1;
|
|
|
|
sm->ap_wpa_ie_len = len;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @ie: Pointer to IE data (starting from id)
|
|
* @len: IE length
|
|
* Returns: 0 on success, -1 on failure
|
|
*
|
|
* Inform WPA state machine about the RSN IE used in Beacon / Probe Response
|
|
* frame.
|
|
*/
|
|
int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
|
|
{
|
|
if (sm == NULL)
|
|
return -1;
|
|
|
|
os_free(sm->ap_rsn_ie);
|
|
if (ie == NULL || len == 0) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: clearing AP RSN IE");
|
|
sm->ap_rsn_ie = NULL;
|
|
sm->ap_rsn_ie_len = 0;
|
|
} else {
|
|
wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len);
|
|
sm->ap_rsn_ie = os_memdup(ie, len);
|
|
if (sm->ap_rsn_ie == NULL)
|
|
return -1;
|
|
|
|
sm->ap_rsn_ie_len = len;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_set_ap_rsnxe - Set AP RSNXE from Beacon/ProbeResp
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @ie: Pointer to IE data (starting from id)
|
|
* @len: IE length
|
|
* Returns: 0 on success, -1 on failure
|
|
*
|
|
* Inform WPA state machine about the RSNXE used in Beacon / Probe Response
|
|
* frame.
|
|
*/
|
|
int wpa_sm_set_ap_rsnxe(struct wpa_sm *sm, const u8 *ie, size_t len)
|
|
{
|
|
if (!sm)
|
|
return -1;
|
|
|
|
os_free(sm->ap_rsnxe);
|
|
if (!ie || len == 0) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: clearing AP RSNXE");
|
|
sm->ap_rsnxe = NULL;
|
|
sm->ap_rsnxe_len = 0;
|
|
} else {
|
|
wpa_hexdump(MSG_DEBUG, "WPA: set AP RSNXE", ie, len);
|
|
sm->ap_rsnxe = os_memdup(ie, len);
|
|
if (!sm->ap_rsnxe)
|
|
return -1;
|
|
|
|
sm->ap_rsnxe_len = len;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE
|
|
* @sm: Pointer to WPA state machine data from wpa_sm_init()
|
|
* @data: Pointer to data area for parsing results
|
|
* Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure
|
|
*
|
|
* Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the
|
|
* parsed data into data.
|
|
*/
|
|
int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data)
|
|
{
|
|
if (sm == NULL)
|
|
return -1;
|
|
|
|
if (sm->assoc_wpa_ie == NULL) {
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
|
|
"WPA: No WPA/RSN IE available from association info");
|
|
return -1;
|
|
}
|
|
if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data))
|
|
return -2;
|
|
return 0;
|
|
}
|
|
|
|
|
|
int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len)
|
|
{
|
|
return pmksa_cache_list(sm->pmksa, buf, len);
|
|
}
|
|
|
|
|
|
struct rsn_pmksa_cache_entry * wpa_sm_pmksa_cache_head(struct wpa_sm *sm)
|
|
{
|
|
return pmksa_cache_head(sm->pmksa);
|
|
}
|
|
|
|
|
|
struct rsn_pmksa_cache_entry *
|
|
wpa_sm_pmksa_cache_add_entry(struct wpa_sm *sm,
|
|
struct rsn_pmksa_cache_entry * entry)
|
|
{
|
|
return pmksa_cache_add_entry(sm->pmksa, entry);
|
|
}
|
|
|
|
|
|
void wpa_sm_pmksa_cache_add(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len,
|
|
const u8 *pmkid, const u8 *bssid,
|
|
const u8 *fils_cache_id)
|
|
{
|
|
sm->cur_pmksa = pmksa_cache_add(sm->pmksa, pmk, pmk_len, pmkid, NULL, 0,
|
|
bssid, sm->own_addr, sm->network_ctx,
|
|
sm->key_mgmt, fils_cache_id);
|
|
}
|
|
|
|
|
|
int wpa_sm_pmksa_exists(struct wpa_sm *sm, const u8 *bssid,
|
|
const void *network_ctx)
|
|
{
|
|
return pmksa_cache_get(sm->pmksa, bssid, NULL, network_ctx, 0) != NULL;
|
|
}
|
|
|
|
|
|
void wpa_sm_drop_sa(struct wpa_sm *sm)
|
|
{
|
|
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK");
|
|
sm->ptk_set = 0;
|
|
sm->tptk_set = 0;
|
|
sm->pmk_len = 0;
|
|
os_memset(sm->pmk, 0, sizeof(sm->pmk));
|
|
os_memset(&sm->ptk, 0, sizeof(sm->ptk));
|
|
os_memset(&sm->tptk, 0, sizeof(sm->tptk));
|
|
os_memset(&sm->gtk, 0, sizeof(sm->gtk));
|
|
os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep));
|
|
os_memset(&sm->igtk, 0, sizeof(sm->igtk));
|
|
os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep));
|
|
#ifdef CONFIG_IEEE80211R
|
|
os_memset(sm->xxkey, 0, sizeof(sm->xxkey));
|
|
sm->xxkey_len = 0;
|
|
os_memset(sm->pmk_r0, 0, sizeof(sm->pmk_r0));
|
|
sm->pmk_r0_len = 0;
|
|
os_memset(sm->pmk_r1, 0, sizeof(sm->pmk_r1));
|
|
sm->pmk_r1_len = 0;
|
|
#endif /* CONFIG_IEEE80211R */
|
|
}
|
|
|
|
|
|
int wpa_sm_has_ptk(struct wpa_sm *sm)
|
|
{
|
|
if (sm == NULL)
|
|
return 0;
|
|
return sm->ptk_set;
|
|
}
|
|
|
|
|
|
int wpa_sm_has_ptk_installed(struct wpa_sm *sm)
|
|
{
|
|
if (!sm)
|
|
return 0;
|
|
return sm->ptk.installed;
|
|
}
|
|
|
|
|
|
void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr)
|
|
{
|
|
os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN);
|
|
}
|
|
|
|
|
|
void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx)
|
|
{
|
|
pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0);
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_WNM
|
|
int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf)
|
|
{
|
|
u16 keyinfo;
|
|
u8 keylen; /* plaintext key len */
|
|
u8 *key_rsc;
|
|
|
|
if (subelem_id == WNM_SLEEP_SUBELEM_GTK) {
|
|
struct wpa_gtk_data gd;
|
|
|
|
os_memset(&gd, 0, sizeof(gd));
|
|
keylen = wpa_cipher_key_len(sm->group_cipher);
|
|
gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher);
|
|
gd.alg = wpa_cipher_to_alg(sm->group_cipher);
|
|
if (gd.alg == WPA_ALG_NONE) {
|
|
wpa_printf(MSG_DEBUG, "Unsupported group cipher suite");
|
|
return -1;
|
|
}
|
|
|
|
key_rsc = buf + 5;
|
|
keyinfo = WPA_GET_LE16(buf + 2);
|
|
gd.gtk_len = keylen;
|
|
if (gd.gtk_len != buf[4]) {
|
|
wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d",
|
|
gd.gtk_len, buf[4]);
|
|
return -1;
|
|
}
|
|
gd.keyidx = keyinfo & 0x03; /* B0 - B1 */
|
|
gd.tx = wpa_supplicant_gtk_tx_bit_workaround(
|
|
sm, !!(keyinfo & WPA_KEY_INFO_TXRX));
|
|
|
|
os_memcpy(gd.gtk, buf + 13, gd.gtk_len);
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)",
|
|
gd.gtk, gd.gtk_len);
|
|
if (wpa_supplicant_install_gtk(sm, &gd, key_rsc, 1)) {
|
|
forced_memzero(&gd, sizeof(gd));
|
|
wpa_printf(MSG_DEBUG, "Failed to install the GTK in "
|
|
"WNM mode");
|
|
return -1;
|
|
}
|
|
forced_memzero(&gd, sizeof(gd));
|
|
} else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) {
|
|
const struct wpa_igtk_kde *igtk;
|
|
|
|
igtk = (const struct wpa_igtk_kde *) (buf + 2);
|
|
if (wpa_supplicant_install_igtk(sm, igtk, 1) < 0)
|
|
return -1;
|
|
} else if (subelem_id == WNM_SLEEP_SUBELEM_BIGTK) {
|
|
const struct wpa_bigtk_kde *bigtk;
|
|
|
|
bigtk = (const struct wpa_bigtk_kde *) (buf + 2);
|
|
if (sm->beacon_prot &&
|
|
wpa_supplicant_install_bigtk(sm, bigtk, 1) < 0)
|
|
return -1;
|
|
} else {
|
|
wpa_printf(MSG_DEBUG, "Unknown element id");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_WNM */
|
|
|
|
|
|
#ifdef CONFIG_P2P
|
|
|
|
int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf)
|
|
{
|
|
if (sm == NULL || WPA_GET_BE32(sm->p2p_ip_addr) == 0)
|
|
return -1;
|
|
os_memcpy(buf, sm->p2p_ip_addr, 3 * 4);
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_P2P */
|
|
|
|
|
|
void wpa_sm_set_rx_replay_ctr(struct wpa_sm *sm, const u8 *rx_replay_counter)
|
|
{
|
|
if (rx_replay_counter == NULL)
|
|
return;
|
|
|
|
os_memcpy(sm->rx_replay_counter, rx_replay_counter,
|
|
WPA_REPLAY_COUNTER_LEN);
|
|
sm->rx_replay_counter_set = 1;
|
|
wpa_printf(MSG_DEBUG, "Updated key replay counter");
|
|
}
|
|
|
|
|
|
void wpa_sm_set_ptk_kck_kek(struct wpa_sm *sm,
|
|
const u8 *ptk_kck, size_t ptk_kck_len,
|
|
const u8 *ptk_kek, size_t ptk_kek_len)
|
|
{
|
|
if (ptk_kck && ptk_kck_len <= WPA_KCK_MAX_LEN) {
|
|
os_memcpy(sm->ptk.kck, ptk_kck, ptk_kck_len);
|
|
sm->ptk.kck_len = ptk_kck_len;
|
|
wpa_printf(MSG_DEBUG, "Updated PTK KCK");
|
|
}
|
|
if (ptk_kek && ptk_kek_len <= WPA_KEK_MAX_LEN) {
|
|
os_memcpy(sm->ptk.kek, ptk_kek, ptk_kek_len);
|
|
sm->ptk.kek_len = ptk_kek_len;
|
|
wpa_printf(MSG_DEBUG, "Updated PTK KEK");
|
|
}
|
|
sm->ptk_set = 1;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_TESTING_OPTIONS
|
|
|
|
void wpa_sm_set_test_assoc_ie(struct wpa_sm *sm, struct wpabuf *buf)
|
|
{
|
|
wpabuf_free(sm->test_assoc_ie);
|
|
sm->test_assoc_ie = buf;
|
|
}
|
|
|
|
|
|
const u8 * wpa_sm_get_anonce(struct wpa_sm *sm)
|
|
{
|
|
return sm->anonce;
|
|
}
|
|
|
|
#endif /* CONFIG_TESTING_OPTIONS */
|
|
|
|
|
|
unsigned int wpa_sm_get_key_mgmt(struct wpa_sm *sm)
|
|
{
|
|
return sm->key_mgmt;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_FILS
|
|
|
|
struct wpabuf * fils_build_auth(struct wpa_sm *sm, int dh_group, const u8 *md)
|
|
{
|
|
struct wpabuf *buf = NULL;
|
|
struct wpabuf *erp_msg;
|
|
struct wpabuf *pub = NULL;
|
|
|
|
erp_msg = eapol_sm_build_erp_reauth_start(sm->eapol);
|
|
if (!erp_msg && !sm->cur_pmksa) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"FILS: Neither ERP EAP-Initiate/Re-auth nor PMKSA cache entry is available - skip FILS");
|
|
goto fail;
|
|
}
|
|
|
|
wpa_printf(MSG_DEBUG, "FILS: Try to use FILS (erp=%d pmksa_cache=%d)",
|
|
erp_msg != NULL, sm->cur_pmksa != NULL);
|
|
|
|
sm->fils_completed = 0;
|
|
|
|
if (!sm->assoc_wpa_ie) {
|
|
wpa_printf(MSG_INFO, "FILS: No own RSN IE set for FILS");
|
|
goto fail;
|
|
}
|
|
|
|
if (random_get_bytes(sm->fils_nonce, FILS_NONCE_LEN) < 0 ||
|
|
random_get_bytes(sm->fils_session, FILS_SESSION_LEN) < 0)
|
|
goto fail;
|
|
|
|
wpa_hexdump(MSG_DEBUG, "FILS: Generated FILS Nonce",
|
|
sm->fils_nonce, FILS_NONCE_LEN);
|
|
wpa_hexdump(MSG_DEBUG, "FILS: Generated FILS Session",
|
|
sm->fils_session, FILS_SESSION_LEN);
|
|
|
|
#ifdef CONFIG_FILS_SK_PFS
|
|
sm->fils_dh_group = dh_group;
|
|
if (dh_group) {
|
|
crypto_ecdh_deinit(sm->fils_ecdh);
|
|
sm->fils_ecdh = crypto_ecdh_init(dh_group);
|
|
if (!sm->fils_ecdh) {
|
|
wpa_printf(MSG_INFO,
|
|
"FILS: Could not initialize ECDH with group %d",
|
|
dh_group);
|
|
goto fail;
|
|
}
|
|
pub = crypto_ecdh_get_pubkey(sm->fils_ecdh, 1);
|
|
if (!pub)
|
|
goto fail;
|
|
wpa_hexdump_buf(MSG_DEBUG, "FILS: Element (DH public key)",
|
|
pub);
|
|
sm->fils_dh_elem_len = wpabuf_len(pub);
|
|
}
|
|
#endif /* CONFIG_FILS_SK_PFS */
|
|
|
|
buf = wpabuf_alloc(1000 + sm->assoc_wpa_ie_len +
|
|
(pub ? wpabuf_len(pub) : 0));
|
|
if (!buf)
|
|
goto fail;
|
|
|
|
/* Fields following the Authentication algorithm number field */
|
|
|
|
/* Authentication Transaction seq# */
|
|
wpabuf_put_le16(buf, 1);
|
|
|
|
/* Status Code */
|
|
wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
|
|
|
|
/* TODO: FILS PK */
|
|
#ifdef CONFIG_FILS_SK_PFS
|
|
if (dh_group) {
|
|
/* Finite Cyclic Group */
|
|
wpabuf_put_le16(buf, dh_group);
|
|
/* Element */
|
|
wpabuf_put_buf(buf, pub);
|
|
}
|
|
#endif /* CONFIG_FILS_SK_PFS */
|
|
|
|
/* RSNE */
|
|
wpa_hexdump(MSG_DEBUG, "FILS: RSNE in FILS Authentication frame",
|
|
sm->assoc_wpa_ie, sm->assoc_wpa_ie_len);
|
|
wpabuf_put_data(buf, sm->assoc_wpa_ie, sm->assoc_wpa_ie_len);
|
|
|
|
if (md) {
|
|
/* MDE when using FILS for FT initial association */
|
|
struct rsn_mdie *mdie;
|
|
|
|
wpabuf_put_u8(buf, WLAN_EID_MOBILITY_DOMAIN);
|
|
wpabuf_put_u8(buf, sizeof(*mdie));
|
|
mdie = wpabuf_put(buf, sizeof(*mdie));
|
|
os_memcpy(mdie->mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
|
|
mdie->ft_capab = 0;
|
|
}
|
|
|
|
/* FILS Nonce */
|
|
wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */
|
|
wpabuf_put_u8(buf, 1 + FILS_NONCE_LEN); /* Length */
|
|
/* Element ID Extension */
|
|
wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_NONCE);
|
|
wpabuf_put_data(buf, sm->fils_nonce, FILS_NONCE_LEN);
|
|
|
|
/* FILS Session */
|
|
wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */
|
|
wpabuf_put_u8(buf, 1 + FILS_SESSION_LEN); /* Length */
|
|
/* Element ID Extension */
|
|
wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_SESSION);
|
|
wpabuf_put_data(buf, sm->fils_session, FILS_SESSION_LEN);
|
|
|
|
/* Wrapped Data */
|
|
sm->fils_erp_pmkid_set = 0;
|
|
if (erp_msg) {
|
|
wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */
|
|
wpabuf_put_u8(buf, 1 + wpabuf_len(erp_msg)); /* Length */
|
|
/* Element ID Extension */
|
|
wpabuf_put_u8(buf, WLAN_EID_EXT_WRAPPED_DATA);
|
|
wpabuf_put_buf(buf, erp_msg);
|
|
/* Calculate pending PMKID here so that we do not need to
|
|
* maintain a copy of the EAP-Initiate/Reauth message. */
|
|
if (fils_pmkid_erp(sm->key_mgmt, wpabuf_head(erp_msg),
|
|
wpabuf_len(erp_msg),
|
|
sm->fils_erp_pmkid) == 0)
|
|
sm->fils_erp_pmkid_set = 1;
|
|
}
|
|
|
|
wpa_hexdump_buf(MSG_DEBUG, "RSN: FILS fields for Authentication frame",
|
|
buf);
|
|
|
|
fail:
|
|
wpabuf_free(erp_msg);
|
|
wpabuf_free(pub);
|
|
return buf;
|
|
}
|
|
|
|
|
|
int fils_process_auth(struct wpa_sm *sm, const u8 *bssid, const u8 *data,
|
|
size_t len)
|
|
{
|
|
const u8 *pos, *end;
|
|
struct ieee802_11_elems elems;
|
|
struct wpa_ie_data rsn;
|
|
int pmkid_match = 0;
|
|
u8 ick[FILS_ICK_MAX_LEN];
|
|
size_t ick_len;
|
|
int res;
|
|
struct wpabuf *dh_ss = NULL;
|
|
const u8 *g_sta = NULL;
|
|
size_t g_sta_len = 0;
|
|
const u8 *g_ap = NULL;
|
|
size_t g_ap_len = 0;
|
|
struct wpabuf *pub = NULL;
|
|
|
|
os_memcpy(sm->bssid, bssid, ETH_ALEN);
|
|
|
|
wpa_hexdump(MSG_DEBUG, "FILS: Authentication frame fields",
|
|
data, len);
|
|
pos = data;
|
|
end = data + len;
|
|
|
|
/* TODO: FILS PK */
|
|
#ifdef CONFIG_FILS_SK_PFS
|
|
if (sm->fils_dh_group) {
|
|
u16 group;
|
|
|
|
/* Using FILS PFS */
|
|
|
|
/* Finite Cyclic Group */
|
|
if (end - pos < 2) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"FILS: No room for Finite Cyclic Group");
|
|
goto fail;
|
|
}
|
|
group = WPA_GET_LE16(pos);
|
|
pos += 2;
|
|
if (group != sm->fils_dh_group) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"FILS: Unexpected change in Finite Cyclic Group: %u (expected %u)",
|
|
group, sm->fils_dh_group);
|
|
goto fail;
|
|
}
|
|
|
|
/* Element */
|
|
if ((size_t) (end - pos) < sm->fils_dh_elem_len) {
|
|
wpa_printf(MSG_DEBUG, "FILS: No room for Element");
|
|
goto fail;
|
|
}
|
|
|
|
if (!sm->fils_ecdh) {
|
|
wpa_printf(MSG_DEBUG, "FILS: No ECDH state available");
|
|
goto fail;
|
|
}
|
|
dh_ss = crypto_ecdh_set_peerkey(sm->fils_ecdh, 1, pos,
|
|
sm->fils_dh_elem_len);
|
|
if (!dh_ss) {
|
|
wpa_printf(MSG_DEBUG, "FILS: ECDH operation failed");
|
|
goto fail;
|
|
}
|
|
wpa_hexdump_buf_key(MSG_DEBUG, "FILS: DH_SS", dh_ss);
|
|
g_ap = pos;
|
|
g_ap_len = sm->fils_dh_elem_len;
|
|
pos += sm->fils_dh_elem_len;
|
|
}
|
|
#endif /* CONFIG_FILS_SK_PFS */
|
|
|
|
wpa_hexdump(MSG_DEBUG, "FILS: Remaining IEs", pos, end - pos);
|
|
if (ieee802_11_parse_elems(pos, end - pos, &elems, 1) == ParseFailed) {
|
|
wpa_printf(MSG_DEBUG, "FILS: Could not parse elements");
|
|
goto fail;
|
|
}
|
|
|
|
/* RSNE */
|
|
wpa_hexdump(MSG_DEBUG, "FILS: RSN element", elems.rsn_ie,
|
|
elems.rsn_ie_len);
|
|
if (!elems.rsn_ie ||
|
|
wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2,
|
|
&rsn) < 0) {
|
|
wpa_printf(MSG_DEBUG, "FILS: No RSN element");
|
|
goto fail;
|
|
}
|
|
|
|
if (!elems.fils_nonce) {
|
|
wpa_printf(MSG_DEBUG, "FILS: No FILS Nonce field");
|
|
goto fail;
|
|
}
|
|
os_memcpy(sm->fils_anonce, elems.fils_nonce, FILS_NONCE_LEN);
|
|
wpa_hexdump(MSG_DEBUG, "FILS: ANonce", sm->fils_anonce, FILS_NONCE_LEN);
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
if (wpa_key_mgmt_ft(sm->key_mgmt)) {
|
|
struct wpa_ft_ies parse;
|
|
|
|
if (!elems.mdie || !elems.ftie) {
|
|
wpa_printf(MSG_DEBUG, "FILS+FT: No MDE or FTE");
|
|
goto fail;
|
|
}
|
|
|
|
if (wpa_ft_parse_ies(pos, end - pos, &parse,
|
|
wpa_key_mgmt_sha384(sm->key_mgmt)) < 0) {
|
|
wpa_printf(MSG_DEBUG, "FILS+FT: Failed to parse IEs");
|
|
goto fail;
|
|
}
|
|
|
|
if (!parse.r0kh_id) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"FILS+FT: No R0KH-ID subelem in FTE");
|
|
goto fail;
|
|
}
|
|
os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
|
|
sm->r0kh_id_len = parse.r0kh_id_len;
|
|
wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: R0KH-ID",
|
|
sm->r0kh_id, sm->r0kh_id_len);
|
|
|
|
if (!parse.r1kh_id) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"FILS+FT: No R1KH-ID subelem in FTE");
|
|
goto fail;
|
|
}
|
|
os_memcpy(sm->r1kh_id, parse.r1kh_id, FT_R1KH_ID_LEN);
|
|
wpa_hexdump(MSG_DEBUG, "FILS+FT: R1KH-ID",
|
|
sm->r1kh_id, FT_R1KH_ID_LEN);
|
|
|
|
/* TODO: Check MDE and FTE payload */
|
|
|
|
wpabuf_free(sm->fils_ft_ies);
|
|
sm->fils_ft_ies = wpabuf_alloc(2 + elems.mdie_len +
|
|
2 + elems.ftie_len);
|
|
if (!sm->fils_ft_ies)
|
|
goto fail;
|
|
wpabuf_put_data(sm->fils_ft_ies, elems.mdie - 2,
|
|
2 + elems.mdie_len);
|
|
wpabuf_put_data(sm->fils_ft_ies, elems.ftie - 2,
|
|
2 + elems.ftie_len);
|
|
} else {
|
|
wpabuf_free(sm->fils_ft_ies);
|
|
sm->fils_ft_ies = NULL;
|
|
}
|
|
#endif /* CONFIG_IEEE80211R */
|
|
|
|
/* PMKID List */
|
|
if (rsn.pmkid && rsn.num_pmkid > 0) {
|
|
wpa_hexdump(MSG_DEBUG, "FILS: PMKID List",
|
|
rsn.pmkid, rsn.num_pmkid * PMKID_LEN);
|
|
|
|
if (rsn.num_pmkid != 1) {
|
|
wpa_printf(MSG_DEBUG, "FILS: Invalid PMKID selection");
|
|
goto fail;
|
|
}
|
|
wpa_hexdump(MSG_DEBUG, "FILS: PMKID", rsn.pmkid, PMKID_LEN);
|
|
if (os_memcmp(sm->cur_pmksa->pmkid, rsn.pmkid, PMKID_LEN) != 0)
|
|
{
|
|
wpa_printf(MSG_DEBUG, "FILS: PMKID mismatch");
|
|
wpa_hexdump(MSG_DEBUG, "FILS: Expected PMKID",
|
|
sm->cur_pmksa->pmkid, PMKID_LEN);
|
|
goto fail;
|
|
}
|
|
wpa_printf(MSG_DEBUG,
|
|
"FILS: Matching PMKID - continue using PMKSA caching");
|
|
pmkid_match = 1;
|
|
}
|
|
if (!pmkid_match && sm->cur_pmksa) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"FILS: No PMKID match - cannot use cached PMKSA entry");
|
|
sm->cur_pmksa = NULL;
|
|
}
|
|
|
|
/* FILS Session */
|
|
if (!elems.fils_session) {
|
|
wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
|
|
goto fail;
|
|
}
|
|
wpa_hexdump(MSG_DEBUG, "FILS: FILS Session", elems.fils_session,
|
|
FILS_SESSION_LEN);
|
|
if (os_memcmp(sm->fils_session, elems.fils_session, FILS_SESSION_LEN)
|
|
!= 0) {
|
|
wpa_printf(MSG_DEBUG, "FILS: Session mismatch");
|
|
wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
|
|
sm->fils_session, FILS_SESSION_LEN);
|
|
goto fail;
|
|
}
|
|
|
|
/* Wrapped Data */
|
|
if (!sm->cur_pmksa && elems.wrapped_data) {
|
|
u8 rmsk[ERP_MAX_KEY_LEN];
|
|
size_t rmsk_len;
|
|
|
|
wpa_hexdump(MSG_DEBUG, "FILS: Wrapped Data",
|
|
elems.wrapped_data,
|
|
elems.wrapped_data_len);
|
|
eapol_sm_process_erp_finish(sm->eapol, elems.wrapped_data,
|
|
elems.wrapped_data_len);
|
|
if (eapol_sm_failed(sm->eapol))
|
|
goto fail;
|
|
|
|
rmsk_len = ERP_MAX_KEY_LEN;
|
|
res = eapol_sm_get_key(sm->eapol, rmsk, rmsk_len);
|
|
if (res == PMK_LEN) {
|
|
rmsk_len = PMK_LEN;
|
|
res = eapol_sm_get_key(sm->eapol, rmsk, rmsk_len);
|
|
}
|
|
if (res)
|
|
goto fail;
|
|
|
|
res = fils_rmsk_to_pmk(sm->key_mgmt, rmsk, rmsk_len,
|
|
sm->fils_nonce, sm->fils_anonce,
|
|
dh_ss ? wpabuf_head(dh_ss) : NULL,
|
|
dh_ss ? wpabuf_len(dh_ss) : 0,
|
|
sm->pmk, &sm->pmk_len);
|
|
forced_memzero(rmsk, sizeof(rmsk));
|
|
|
|
/* Don't use DHss in PTK derivation if PMKSA caching is not
|
|
* used. */
|
|
wpabuf_clear_free(dh_ss);
|
|
dh_ss = NULL;
|
|
|
|
if (res)
|
|
goto fail;
|
|
|
|
if (!sm->fils_erp_pmkid_set) {
|
|
wpa_printf(MSG_DEBUG, "FILS: PMKID not available");
|
|
goto fail;
|
|
}
|
|
wpa_hexdump(MSG_DEBUG, "FILS: PMKID", sm->fils_erp_pmkid,
|
|
PMKID_LEN);
|
|
wpa_printf(MSG_DEBUG, "FILS: ERP processing succeeded - add PMKSA cache entry for the result");
|
|
sm->cur_pmksa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len,
|
|
sm->fils_erp_pmkid, NULL, 0,
|
|
sm->bssid, sm->own_addr,
|
|
sm->network_ctx, sm->key_mgmt,
|
|
NULL);
|
|
}
|
|
|
|
if (!sm->cur_pmksa) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"FILS: No remaining options to continue FILS authentication");
|
|
goto fail;
|
|
}
|
|
|
|
if (fils_pmk_to_ptk(sm->pmk, sm->pmk_len, sm->own_addr, sm->bssid,
|
|
sm->fils_nonce, sm->fils_anonce,
|
|
dh_ss ? wpabuf_head(dh_ss) : NULL,
|
|
dh_ss ? wpabuf_len(dh_ss) : 0,
|
|
&sm->ptk, ick, &ick_len,
|
|
sm->key_mgmt, sm->pairwise_cipher,
|
|
sm->fils_ft, &sm->fils_ft_len) < 0) {
|
|
wpa_printf(MSG_DEBUG, "FILS: Failed to derive PTK");
|
|
goto fail;
|
|
}
|
|
|
|
wpabuf_clear_free(dh_ss);
|
|
dh_ss = NULL;
|
|
|
|
sm->ptk_set = 1;
|
|
sm->tptk_set = 0;
|
|
os_memset(&sm->tptk, 0, sizeof(sm->tptk));
|
|
|
|
#ifdef CONFIG_FILS_SK_PFS
|
|
if (sm->fils_dh_group) {
|
|
if (!sm->fils_ecdh) {
|
|
wpa_printf(MSG_INFO, "FILS: ECDH not initialized");
|
|
goto fail;
|
|
}
|
|
pub = crypto_ecdh_get_pubkey(sm->fils_ecdh, 1);
|
|
if (!pub)
|
|
goto fail;
|
|
wpa_hexdump_buf(MSG_DEBUG, "FILS: gSTA", pub);
|
|
g_sta = wpabuf_head(pub);
|
|
g_sta_len = wpabuf_len(pub);
|
|
if (!g_ap) {
|
|
wpa_printf(MSG_INFO, "FILS: gAP not available");
|
|
goto fail;
|
|
}
|
|
wpa_hexdump(MSG_DEBUG, "FILS: gAP", g_ap, g_ap_len);
|
|
}
|
|
#endif /* CONFIG_FILS_SK_PFS */
|
|
|
|
res = fils_key_auth_sk(ick, ick_len, sm->fils_nonce,
|
|
sm->fils_anonce, sm->own_addr, sm->bssid,
|
|
g_sta, g_sta_len, g_ap, g_ap_len,
|
|
sm->key_mgmt, sm->fils_key_auth_sta,
|
|
sm->fils_key_auth_ap,
|
|
&sm->fils_key_auth_len);
|
|
wpabuf_free(pub);
|
|
forced_memzero(ick, sizeof(ick));
|
|
return res;
|
|
fail:
|
|
wpabuf_free(pub);
|
|
wpabuf_clear_free(dh_ss);
|
|
return -1;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
static int fils_ft_build_assoc_req_rsne(struct wpa_sm *sm, struct wpabuf *buf)
|
|
{
|
|
struct rsn_ie_hdr *rsnie;
|
|
u16 capab;
|
|
u8 *pos;
|
|
int use_sha384 = wpa_key_mgmt_sha384(sm->key_mgmt);
|
|
|
|
/* RSNIE[PMKR0Name/PMKR1Name] */
|
|
rsnie = wpabuf_put(buf, sizeof(*rsnie));
|
|
rsnie->elem_id = WLAN_EID_RSN;
|
|
WPA_PUT_LE16(rsnie->version, RSN_VERSION);
|
|
|
|
/* Group Suite Selector */
|
|
if (!wpa_cipher_valid_group(sm->group_cipher)) {
|
|
wpa_printf(MSG_WARNING, "FT: Invalid group cipher (%d)",
|
|
sm->group_cipher);
|
|
return -1;
|
|
}
|
|
pos = wpabuf_put(buf, RSN_SELECTOR_LEN);
|
|
RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN,
|
|
sm->group_cipher));
|
|
|
|
/* Pairwise Suite Count */
|
|
wpabuf_put_le16(buf, 1);
|
|
|
|
/* Pairwise Suite List */
|
|
if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) {
|
|
wpa_printf(MSG_WARNING, "FT: Invalid pairwise cipher (%d)",
|
|
sm->pairwise_cipher);
|
|
return -1;
|
|
}
|
|
pos = wpabuf_put(buf, RSN_SELECTOR_LEN);
|
|
RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN,
|
|
sm->pairwise_cipher));
|
|
|
|
/* Authenticated Key Management Suite Count */
|
|
wpabuf_put_le16(buf, 1);
|
|
|
|
/* Authenticated Key Management Suite List */
|
|
pos = wpabuf_put(buf, RSN_SELECTOR_LEN);
|
|
if (sm->key_mgmt == WPA_KEY_MGMT_FT_FILS_SHA256)
|
|
RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA256);
|
|
else if (sm->key_mgmt == WPA_KEY_MGMT_FT_FILS_SHA384)
|
|
RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA384);
|
|
else {
|
|
wpa_printf(MSG_WARNING,
|
|
"FILS+FT: Invalid key management type (%d)",
|
|
sm->key_mgmt);
|
|
return -1;
|
|
}
|
|
|
|
/* RSN Capabilities */
|
|
capab = 0;
|
|
if (sm->mfp)
|
|
capab |= WPA_CAPABILITY_MFPC;
|
|
if (sm->mfp == 2)
|
|
capab |= WPA_CAPABILITY_MFPR;
|
|
if (sm->ocv)
|
|
capab |= WPA_CAPABILITY_OCVC;
|
|
wpabuf_put_le16(buf, capab);
|
|
|
|
/* PMKID Count */
|
|
wpabuf_put_le16(buf, 1);
|
|
|
|
/* PMKID List [PMKR1Name] */
|
|
wpa_hexdump_key(MSG_DEBUG, "FILS+FT: XXKey (FILS-FT)",
|
|
sm->fils_ft, sm->fils_ft_len);
|
|
wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: SSID", sm->ssid, sm->ssid_len);
|
|
wpa_hexdump(MSG_DEBUG, "FILS+FT: MDID",
|
|
sm->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
|
|
wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: R0KH-ID",
|
|
sm->r0kh_id, sm->r0kh_id_len);
|
|
if (wpa_derive_pmk_r0(sm->fils_ft, sm->fils_ft_len, sm->ssid,
|
|
sm->ssid_len, sm->mobility_domain,
|
|
sm->r0kh_id, sm->r0kh_id_len, sm->own_addr,
|
|
sm->pmk_r0, sm->pmk_r0_name, use_sha384) < 0) {
|
|
wpa_printf(MSG_WARNING, "FILS+FT: Could not derive PMK-R0");
|
|
return -1;
|
|
}
|
|
sm->pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN;
|
|
wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0",
|
|
sm->pmk_r0, sm->pmk_r0_len);
|
|
wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name",
|
|
sm->pmk_r0_name, WPA_PMK_NAME_LEN);
|
|
wpa_printf(MSG_DEBUG, "FILS+FT: R1KH-ID: " MACSTR,
|
|
MAC2STR(sm->r1kh_id));
|
|
pos = wpabuf_put(buf, WPA_PMK_NAME_LEN);
|
|
if (wpa_derive_pmk_r1_name(sm->pmk_r0_name, sm->r1kh_id, sm->own_addr,
|
|
sm->pmk_r1_name, use_sha384) < 0) {
|
|
wpa_printf(MSG_WARNING, "FILS+FT: Could not derive PMKR1Name");
|
|
return -1;
|
|
}
|
|
wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR1Name", sm->pmk_r1_name,
|
|
WPA_PMK_NAME_LEN);
|
|
os_memcpy(pos, sm->pmk_r1_name, WPA_PMK_NAME_LEN);
|
|
|
|
if (sm->mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC) {
|
|
/* Management Group Cipher Suite */
|
|
pos = wpabuf_put(buf, RSN_SELECTOR_LEN);
|
|
RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC);
|
|
}
|
|
|
|
rsnie->len = ((u8 *) wpabuf_put(buf, 0) - (u8 *) rsnie) - 2;
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_IEEE80211R */
|
|
|
|
|
|
struct wpabuf * fils_build_assoc_req(struct wpa_sm *sm, const u8 **kek,
|
|
size_t *kek_len, const u8 **snonce,
|
|
const u8 **anonce,
|
|
const struct wpabuf **hlp,
|
|
unsigned int num_hlp)
|
|
{
|
|
struct wpabuf *buf;
|
|
size_t len;
|
|
unsigned int i;
|
|
|
|
len = 1000;
|
|
#ifdef CONFIG_IEEE80211R
|
|
if (sm->fils_ft_ies)
|
|
len += wpabuf_len(sm->fils_ft_ies);
|
|
if (wpa_key_mgmt_ft(sm->key_mgmt))
|
|
len += 256;
|
|
#endif /* CONFIG_IEEE80211R */
|
|
for (i = 0; hlp && i < num_hlp; i++)
|
|
len += 10 + wpabuf_len(hlp[i]);
|
|
buf = wpabuf_alloc(len);
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
if (wpa_key_mgmt_ft(sm->key_mgmt) && sm->fils_ft_ies) {
|
|
/* MDE and FTE when using FILS+FT */
|
|
wpabuf_put_buf(buf, sm->fils_ft_ies);
|
|
/* RSNE with PMKR1Name in PMKID field */
|
|
if (fils_ft_build_assoc_req_rsne(sm, buf) < 0) {
|
|
wpabuf_free(buf);
|
|
return NULL;
|
|
}
|
|
}
|
|
#endif /* CONFIG_IEEE80211R */
|
|
|
|
/* FILS Session */
|
|
wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */
|
|
wpabuf_put_u8(buf, 1 + FILS_SESSION_LEN); /* Length */
|
|
/* Element ID Extension */
|
|
wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_SESSION);
|
|
wpabuf_put_data(buf, sm->fils_session, FILS_SESSION_LEN);
|
|
|
|
/* Everything after FILS Session element gets encrypted in the driver
|
|
* with KEK. The buffer returned from here is the plaintext version. */
|
|
|
|
/* TODO: FILS Public Key */
|
|
|
|
/* FILS Key Confirm */
|
|
wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */
|
|
wpabuf_put_u8(buf, 1 + sm->fils_key_auth_len); /* Length */
|
|
/* Element ID Extension */
|
|
wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_KEY_CONFIRM);
|
|
wpabuf_put_data(buf, sm->fils_key_auth_sta, sm->fils_key_auth_len);
|
|
|
|
/* FILS HLP Container */
|
|
for (i = 0; hlp && i < num_hlp; i++) {
|
|
const u8 *pos = wpabuf_head(hlp[i]);
|
|
size_t left = wpabuf_len(hlp[i]);
|
|
|
|
wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */
|
|
if (left <= 254)
|
|
len = 1 + left;
|
|
else
|
|
len = 255;
|
|
wpabuf_put_u8(buf, len); /* Length */
|
|
/* Element ID Extension */
|
|
wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_HLP_CONTAINER);
|
|
/* Destination MAC Address, Source MAC Address, HLP Packet.
|
|
* HLP Packet is in MSDU format (i.e., included the LLC/SNAP
|
|
* header when LPD is used). */
|
|
wpabuf_put_data(buf, pos, len - 1);
|
|
pos += len - 1;
|
|
left -= len - 1;
|
|
while (left) {
|
|
wpabuf_put_u8(buf, WLAN_EID_FRAGMENT);
|
|
len = left > 255 ? 255 : left;
|
|
wpabuf_put_u8(buf, len);
|
|
wpabuf_put_data(buf, pos, len);
|
|
pos += len;
|
|
left -= len;
|
|
}
|
|
}
|
|
|
|
/* TODO: FILS IP Address Assignment */
|
|
|
|
#ifdef CONFIG_OCV
|
|
if (wpa_sm_ocv_enabled(sm)) {
|
|
struct wpa_channel_info ci;
|
|
u8 *pos;
|
|
|
|
if (wpa_sm_channel_info(sm, &ci) != 0) {
|
|
wpa_printf(MSG_WARNING,
|
|
"FILS: Failed to get channel info for OCI element");
|
|
wpabuf_free(buf);
|
|
return NULL;
|
|
}
|
|
|
|
pos = wpabuf_put(buf, OCV_OCI_EXTENDED_LEN);
|
|
if (ocv_insert_extended_oci(&ci, pos) < 0) {
|
|
wpabuf_free(buf);
|
|
return NULL;
|
|
}
|
|
}
|
|
#endif /* CONFIG_OCV */
|
|
|
|
wpa_hexdump_buf(MSG_DEBUG, "FILS: Association Request plaintext", buf);
|
|
|
|
*kek = sm->ptk.kek;
|
|
*kek_len = sm->ptk.kek_len;
|
|
wpa_hexdump_key(MSG_DEBUG, "FILS: KEK for AEAD", *kek, *kek_len);
|
|
*snonce = sm->fils_nonce;
|
|
wpa_hexdump(MSG_DEBUG, "FILS: SNonce for AEAD AAD",
|
|
*snonce, FILS_NONCE_LEN);
|
|
*anonce = sm->fils_anonce;
|
|
wpa_hexdump(MSG_DEBUG, "FILS: ANonce for AEAD AAD",
|
|
*anonce, FILS_NONCE_LEN);
|
|
|
|
return buf;
|
|
}
|
|
|
|
|
|
static void fils_process_hlp_resp(struct wpa_sm *sm, const u8 *resp, size_t len)
|
|
{
|
|
const u8 *pos, *end;
|
|
|
|
wpa_hexdump(MSG_MSGDUMP, "FILS: HLP response", resp, len);
|
|
if (len < 2 * ETH_ALEN)
|
|
return;
|
|
pos = resp + 2 * ETH_ALEN;
|
|
end = resp + len;
|
|
if (end - pos >= 6 &&
|
|
os_memcmp(pos, "\xaa\xaa\x03\x00\x00\x00", 6) == 0)
|
|
pos += 6; /* Remove SNAP/LLC header */
|
|
wpa_sm_fils_hlp_rx(sm, resp, resp + ETH_ALEN, pos, end - pos);
|
|
}
|
|
|
|
|
|
static void fils_process_hlp_container(struct wpa_sm *sm, const u8 *pos,
|
|
size_t len)
|
|
{
|
|
const u8 *end = pos + len;
|
|
u8 *tmp, *tmp_pos;
|
|
|
|
/* Check if there are any FILS HLP Container elements */
|
|
while (end - pos >= 2) {
|
|
if (2 + pos[1] > end - pos)
|
|
return;
|
|
if (pos[0] == WLAN_EID_EXTENSION &&
|
|
pos[1] >= 1 + 2 * ETH_ALEN &&
|
|
pos[2] == WLAN_EID_EXT_FILS_HLP_CONTAINER)
|
|
break;
|
|
pos += 2 + pos[1];
|
|
}
|
|
if (end - pos < 2)
|
|
return; /* No FILS HLP Container elements */
|
|
|
|
tmp = os_malloc(end - pos);
|
|
if (!tmp)
|
|
return;
|
|
|
|
while (end - pos >= 2) {
|
|
if (2 + pos[1] > end - pos ||
|
|
pos[0] != WLAN_EID_EXTENSION ||
|
|
pos[1] < 1 + 2 * ETH_ALEN ||
|
|
pos[2] != WLAN_EID_EXT_FILS_HLP_CONTAINER)
|
|
break;
|
|
tmp_pos = tmp;
|
|
os_memcpy(tmp_pos, pos + 3, pos[1] - 1);
|
|
tmp_pos += pos[1] - 1;
|
|
pos += 2 + pos[1];
|
|
|
|
/* Add possible fragments */
|
|
while (end - pos >= 2 && pos[0] == WLAN_EID_FRAGMENT &&
|
|
2 + pos[1] <= end - pos) {
|
|
os_memcpy(tmp_pos, pos + 2, pos[1]);
|
|
tmp_pos += pos[1];
|
|
pos += 2 + pos[1];
|
|
}
|
|
|
|
fils_process_hlp_resp(sm, tmp, tmp_pos - tmp);
|
|
}
|
|
|
|
os_free(tmp);
|
|
}
|
|
|
|
|
|
int fils_process_assoc_resp(struct wpa_sm *sm, const u8 *resp, size_t len)
|
|
{
|
|
const struct ieee80211_mgmt *mgmt;
|
|
const u8 *end, *ie_start;
|
|
struct ieee802_11_elems elems;
|
|
int keylen, rsclen;
|
|
enum wpa_alg alg;
|
|
struct wpa_gtk_data gd;
|
|
int maxkeylen;
|
|
struct wpa_eapol_ie_parse kde;
|
|
|
|
if (!sm || !sm->ptk_set) {
|
|
wpa_printf(MSG_DEBUG, "FILS: No KEK available");
|
|
return -1;
|
|
}
|
|
|
|
if (!wpa_key_mgmt_fils(sm->key_mgmt)) {
|
|
wpa_printf(MSG_DEBUG, "FILS: Not a FILS AKM");
|
|
return -1;
|
|
}
|
|
|
|
if (sm->fils_completed) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"FILS: Association has already been completed for this FILS authentication - ignore unexpected retransmission");
|
|
return -1;
|
|
}
|
|
|
|
wpa_hexdump(MSG_DEBUG, "FILS: (Re)Association Response frame",
|
|
resp, len);
|
|
|
|
mgmt = (const struct ieee80211_mgmt *) resp;
|
|
if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_resp))
|
|
return -1;
|
|
|
|
end = resp + len;
|
|
/* Same offset for Association Response and Reassociation Response */
|
|
ie_start = mgmt->u.assoc_resp.variable;
|
|
|
|
if (ieee802_11_parse_elems(ie_start, end - ie_start, &elems, 1) ==
|
|
ParseFailed) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"FILS: Failed to parse decrypted elements");
|
|
goto fail;
|
|
}
|
|
|
|
if (!elems.fils_session) {
|
|
wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
|
|
return -1;
|
|
}
|
|
if (os_memcmp(elems.fils_session, sm->fils_session,
|
|
FILS_SESSION_LEN) != 0) {
|
|
wpa_printf(MSG_DEBUG, "FILS: FILS Session mismatch");
|
|
wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session",
|
|
elems.fils_session, FILS_SESSION_LEN);
|
|
wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
|
|
sm->fils_session, FILS_SESSION_LEN);
|
|
}
|
|
|
|
if (!elems.rsn_ie) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"FILS: No RSNE in (Re)Association Response");
|
|
/* As an interop workaround, allow this for now since IEEE Std
|
|
* 802.11ai-2016 did not include all the needed changes to make
|
|
* a FILS AP include RSNE in the frame. This workaround might
|
|
* eventually be removed and replaced with rejection (goto fail)
|
|
* to follow a strict interpretation of the standard. */
|
|
} else if (wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt),
|
|
sm->ap_rsn_ie, sm->ap_rsn_ie_len,
|
|
elems.rsn_ie - 2, elems.rsn_ie_len + 2)) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
|
|
"FILS: RSNE mismatch between Beacon/Probe Response and (Re)Association Response");
|
|
wpa_hexdump(MSG_DEBUG, "FILS: RSNE in Beacon/Probe Response",
|
|
sm->ap_rsn_ie, sm->ap_rsn_ie_len);
|
|
wpa_hexdump(MSG_DEBUG, "FILS: RSNE in (Re)Association Response",
|
|
elems.rsn_ie, elems.rsn_ie_len);
|
|
goto fail;
|
|
}
|
|
|
|
/* TODO: FILS Public Key */
|
|
|
|
if (!elems.fils_key_confirm) {
|
|
wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element");
|
|
goto fail;
|
|
}
|
|
if (elems.fils_key_confirm_len != sm->fils_key_auth_len) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"FILS: Unexpected Key-Auth length %d (expected %d)",
|
|
elems.fils_key_confirm_len,
|
|
(int) sm->fils_key_auth_len);
|
|
goto fail;
|
|
}
|
|
if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_ap,
|
|
sm->fils_key_auth_len) != 0) {
|
|
wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch");
|
|
wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth",
|
|
elems.fils_key_confirm,
|
|
elems.fils_key_confirm_len);
|
|
wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth",
|
|
sm->fils_key_auth_ap, sm->fils_key_auth_len);
|
|
goto fail;
|
|
}
|
|
|
|
#ifdef CONFIG_OCV
|
|
if (wpa_sm_ocv_enabled(sm)) {
|
|
struct wpa_channel_info ci;
|
|
|
|
if (wpa_sm_channel_info(sm, &ci) != 0) {
|
|
wpa_printf(MSG_WARNING,
|
|
"Failed to get channel info to validate received OCI in FILS (Re)Association Response frame");
|
|
goto fail;
|
|
}
|
|
|
|
if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci,
|
|
channel_width_to_int(ci.chanwidth),
|
|
ci.seg1_idx) != 0) {
|
|
wpa_printf(MSG_WARNING, "FILS: %s", ocv_errorstr);
|
|
goto fail;
|
|
}
|
|
}
|
|
#endif /* CONFIG_OCV */
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
if (wpa_key_mgmt_ft(sm->key_mgmt) && sm->fils_ft_ies) {
|
|
struct wpa_ie_data rsn;
|
|
|
|
/* Check that PMKR1Name derived by the AP matches */
|
|
if (!elems.rsn_ie ||
|
|
wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2,
|
|
&rsn) < 0 ||
|
|
!rsn.pmkid || rsn.num_pmkid != 1 ||
|
|
os_memcmp(rsn.pmkid, sm->pmk_r1_name,
|
|
WPA_PMK_NAME_LEN) != 0) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"FILS+FT: No RSNE[PMKR1Name] match in AssocResp");
|
|
goto fail;
|
|
}
|
|
}
|
|
#endif /* CONFIG_IEEE80211R */
|
|
|
|
/* Key Delivery */
|
|
if (!elems.key_delivery) {
|
|
wpa_printf(MSG_DEBUG, "FILS: No Key Delivery element");
|
|
goto fail;
|
|
}
|
|
|
|
/* Parse GTK and set the key to the driver */
|
|
os_memset(&gd, 0, sizeof(gd));
|
|
if (wpa_supplicant_parse_ies(elems.key_delivery + WPA_KEY_RSC_LEN,
|
|
elems.key_delivery_len - WPA_KEY_RSC_LEN,
|
|
&kde) < 0) {
|
|
wpa_printf(MSG_DEBUG, "FILS: Failed to parse KDEs");
|
|
goto fail;
|
|
}
|
|
if (!kde.gtk) {
|
|
wpa_printf(MSG_DEBUG, "FILS: No GTK KDE");
|
|
goto fail;
|
|
}
|
|
maxkeylen = gd.gtk_len = kde.gtk_len - 2;
|
|
if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
|
|
gd.gtk_len, maxkeylen,
|
|
&gd.key_rsc_len, &gd.alg))
|
|
goto fail;
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "FILS: Received GTK", kde.gtk, kde.gtk_len);
|
|
gd.keyidx = kde.gtk[0] & 0x3;
|
|
gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
|
|
!!(kde.gtk[0] & BIT(2)));
|
|
if (kde.gtk_len - 2 > sizeof(gd.gtk)) {
|
|
wpa_printf(MSG_DEBUG, "FILS: Too long GTK in GTK KDE (len=%lu)",
|
|
(unsigned long) kde.gtk_len - 2);
|
|
goto fail;
|
|
}
|
|
os_memcpy(gd.gtk, kde.gtk + 2, kde.gtk_len - 2);
|
|
|
|
wpa_printf(MSG_DEBUG, "FILS: Set GTK to driver");
|
|
if (wpa_supplicant_install_gtk(sm, &gd, elems.key_delivery, 0) < 0) {
|
|
wpa_printf(MSG_DEBUG, "FILS: Failed to set GTK");
|
|
goto fail;
|
|
}
|
|
|
|
if (ieee80211w_set_keys(sm, &kde) < 0) {
|
|
wpa_printf(MSG_DEBUG, "FILS: Failed to set IGTK");
|
|
goto fail;
|
|
}
|
|
|
|
alg = wpa_cipher_to_alg(sm->pairwise_cipher);
|
|
keylen = wpa_cipher_key_len(sm->pairwise_cipher);
|
|
if (keylen <= 0 || (unsigned int) keylen != sm->ptk.tk_len) {
|
|
wpa_printf(MSG_DEBUG, "FILS: TK length mismatch: %u != %lu",
|
|
keylen, (long unsigned int) sm->ptk.tk_len);
|
|
goto fail;
|
|
}
|
|
rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher);
|
|
wpa_hexdump_key(MSG_DEBUG, "FILS: Set TK to driver",
|
|
sm->ptk.tk, keylen);
|
|
if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, null_rsc, rsclen,
|
|
sm->ptk.tk, keylen, KEY_FLAG_PAIRWISE_RX_TX) < 0) {
|
|
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
|
|
"FILS: Failed to set PTK to the driver (alg=%d keylen=%d bssid="
|
|
MACSTR ")",
|
|
alg, keylen, MAC2STR(sm->bssid));
|
|
goto fail;
|
|
}
|
|
|
|
/* TODO: TK could be cleared after auth frame exchange now that driver
|
|
* takes care of association frame encryption/decryption. */
|
|
/* TK is not needed anymore in supplicant */
|
|
os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN);
|
|
sm->ptk.tk_len = 0;
|
|
sm->ptk.installed = 1;
|
|
|
|
/* FILS HLP Container */
|
|
fils_process_hlp_container(sm, ie_start, end - ie_start);
|
|
|
|
/* TODO: FILS IP Address Assignment */
|
|
|
|
wpa_printf(MSG_DEBUG, "FILS: Auth+Assoc completed successfully");
|
|
sm->fils_completed = 1;
|
|
forced_memzero(&gd, sizeof(gd));
|
|
|
|
return 0;
|
|
fail:
|
|
forced_memzero(&gd, sizeof(gd));
|
|
return -1;
|
|
}
|
|
|
|
|
|
void wpa_sm_set_reset_fils_completed(struct wpa_sm *sm, int set)
|
|
{
|
|
if (sm)
|
|
sm->fils_completed = !!set;
|
|
}
|
|
|
|
#endif /* CONFIG_FILS */
|
|
|
|
|
|
int wpa_fils_is_completed(struct wpa_sm *sm)
|
|
{
|
|
#ifdef CONFIG_FILS
|
|
return sm && sm->fils_completed;
|
|
#else /* CONFIG_FILS */
|
|
return 0;
|
|
#endif /* CONFIG_FILS */
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_OWE
|
|
|
|
struct wpabuf * owe_build_assoc_req(struct wpa_sm *sm, u16 group)
|
|
{
|
|
struct wpabuf *ie = NULL, *pub = NULL;
|
|
size_t prime_len;
|
|
|
|
if (group == 19)
|
|
prime_len = 32;
|
|
else if (group == 20)
|
|
prime_len = 48;
|
|
else if (group == 21)
|
|
prime_len = 66;
|
|
else
|
|
return NULL;
|
|
|
|
crypto_ecdh_deinit(sm->owe_ecdh);
|
|
sm->owe_ecdh = crypto_ecdh_init(group);
|
|
if (!sm->owe_ecdh)
|
|
goto fail;
|
|
sm->owe_group = group;
|
|
pub = crypto_ecdh_get_pubkey(sm->owe_ecdh, 0);
|
|
pub = wpabuf_zeropad(pub, prime_len);
|
|
if (!pub)
|
|
goto fail;
|
|
|
|
ie = wpabuf_alloc(5 + wpabuf_len(pub));
|
|
if (!ie)
|
|
goto fail;
|
|
wpabuf_put_u8(ie, WLAN_EID_EXTENSION);
|
|
wpabuf_put_u8(ie, 1 + 2 + wpabuf_len(pub));
|
|
wpabuf_put_u8(ie, WLAN_EID_EXT_OWE_DH_PARAM);
|
|
wpabuf_put_le16(ie, group);
|
|
wpabuf_put_buf(ie, pub);
|
|
wpabuf_free(pub);
|
|
wpa_hexdump_buf(MSG_DEBUG, "OWE: Diffie-Hellman Parameter element",
|
|
ie);
|
|
|
|
return ie;
|
|
fail:
|
|
wpabuf_free(pub);
|
|
crypto_ecdh_deinit(sm->owe_ecdh);
|
|
sm->owe_ecdh = NULL;
|
|
return NULL;
|
|
}
|
|
|
|
|
|
int owe_process_assoc_resp(struct wpa_sm *sm, const u8 *bssid,
|
|
const u8 *resp_ies, size_t resp_ies_len)
|
|
{
|
|
struct ieee802_11_elems elems;
|
|
u16 group;
|
|
struct wpabuf *secret, *pub, *hkey;
|
|
int res;
|
|
u8 prk[SHA512_MAC_LEN], pmkid[SHA512_MAC_LEN];
|
|
const char *info = "OWE Key Generation";
|
|
const u8 *addr[2];
|
|
size_t len[2];
|
|
size_t hash_len, prime_len;
|
|
struct wpa_ie_data data;
|
|
|
|
if (!resp_ies ||
|
|
ieee802_11_parse_elems(resp_ies, resp_ies_len, &elems, 1) ==
|
|
ParseFailed) {
|
|
wpa_printf(MSG_INFO,
|
|
"OWE: Could not parse Association Response frame elements");
|
|
return -1;
|
|
}
|
|
|
|
if (sm->cur_pmksa && elems.rsn_ie &&
|
|
wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, 2 + elems.rsn_ie_len,
|
|
&data) == 0 &&
|
|
data.num_pmkid == 1 && data.pmkid &&
|
|
os_memcmp(sm->cur_pmksa->pmkid, data.pmkid, PMKID_LEN) == 0) {
|
|
wpa_printf(MSG_DEBUG, "OWE: Use PMKSA caching");
|
|
wpa_sm_set_pmk_from_pmksa(sm);
|
|
return 0;
|
|
}
|
|
|
|
if (!elems.owe_dh) {
|
|
wpa_printf(MSG_INFO,
|
|
"OWE: No Diffie-Hellman Parameter element found in Association Response frame");
|
|
return -1;
|
|
}
|
|
|
|
group = WPA_GET_LE16(elems.owe_dh);
|
|
if (group != sm->owe_group) {
|
|
wpa_printf(MSG_INFO,
|
|
"OWE: Unexpected Diffie-Hellman group in response: %u",
|
|
group);
|
|
return -1;
|
|
}
|
|
|
|
if (!sm->owe_ecdh) {
|
|
wpa_printf(MSG_INFO, "OWE: No ECDH state available");
|
|
return -1;
|
|
}
|
|
|
|
if (group == 19)
|
|
prime_len = 32;
|
|
else if (group == 20)
|
|
prime_len = 48;
|
|
else if (group == 21)
|
|
prime_len = 66;
|
|
else
|
|
return -1;
|
|
|
|
secret = crypto_ecdh_set_peerkey(sm->owe_ecdh, 0,
|
|
elems.owe_dh + 2,
|
|
elems.owe_dh_len - 2);
|
|
secret = wpabuf_zeropad(secret, prime_len);
|
|
if (!secret) {
|
|
wpa_printf(MSG_DEBUG, "OWE: Invalid peer DH public key");
|
|
return -1;
|
|
}
|
|
wpa_hexdump_buf_key(MSG_DEBUG, "OWE: DH shared secret", secret);
|
|
|
|
/* prk = HKDF-extract(C | A | group, z) */
|
|
|
|
pub = crypto_ecdh_get_pubkey(sm->owe_ecdh, 0);
|
|
if (!pub) {
|
|
wpabuf_clear_free(secret);
|
|
return -1;
|
|
}
|
|
|
|
/* PMKID = Truncate-128(Hash(C | A)) */
|
|
addr[0] = wpabuf_head(pub);
|
|
len[0] = wpabuf_len(pub);
|
|
addr[1] = elems.owe_dh + 2;
|
|
len[1] = elems.owe_dh_len - 2;
|
|
if (group == 19) {
|
|
res = sha256_vector(2, addr, len, pmkid);
|
|
hash_len = SHA256_MAC_LEN;
|
|
} else if (group == 20) {
|
|
res = sha384_vector(2, addr, len, pmkid);
|
|
hash_len = SHA384_MAC_LEN;
|
|
} else if (group == 21) {
|
|
res = sha512_vector(2, addr, len, pmkid);
|
|
hash_len = SHA512_MAC_LEN;
|
|
} else {
|
|
res = -1;
|
|
hash_len = 0;
|
|
}
|
|
pub = wpabuf_zeropad(pub, prime_len);
|
|
if (res < 0 || !pub) {
|
|
wpabuf_free(pub);
|
|
wpabuf_clear_free(secret);
|
|
return -1;
|
|
}
|
|
|
|
hkey = wpabuf_alloc(wpabuf_len(pub) + elems.owe_dh_len - 2 + 2);
|
|
if (!hkey) {
|
|
wpabuf_free(pub);
|
|
wpabuf_clear_free(secret);
|
|
return -1;
|
|
}
|
|
|
|
wpabuf_put_buf(hkey, pub); /* C */
|
|
wpabuf_free(pub);
|
|
wpabuf_put_data(hkey, elems.owe_dh + 2, elems.owe_dh_len - 2); /* A */
|
|
wpabuf_put_le16(hkey, sm->owe_group); /* group */
|
|
if (group == 19)
|
|
res = hmac_sha256(wpabuf_head(hkey), wpabuf_len(hkey),
|
|
wpabuf_head(secret), wpabuf_len(secret), prk);
|
|
else if (group == 20)
|
|
res = hmac_sha384(wpabuf_head(hkey), wpabuf_len(hkey),
|
|
wpabuf_head(secret), wpabuf_len(secret), prk);
|
|
else if (group == 21)
|
|
res = hmac_sha512(wpabuf_head(hkey), wpabuf_len(hkey),
|
|
wpabuf_head(secret), wpabuf_len(secret), prk);
|
|
wpabuf_clear_free(hkey);
|
|
wpabuf_clear_free(secret);
|
|
if (res < 0)
|
|
return -1;
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "OWE: prk", prk, hash_len);
|
|
|
|
/* PMK = HKDF-expand(prk, "OWE Key Generation", n) */
|
|
|
|
if (group == 19)
|
|
res = hmac_sha256_kdf(prk, hash_len, NULL, (const u8 *) info,
|
|
os_strlen(info), sm->pmk, hash_len);
|
|
else if (group == 20)
|
|
res = hmac_sha384_kdf(prk, hash_len, NULL, (const u8 *) info,
|
|
os_strlen(info), sm->pmk, hash_len);
|
|
else if (group == 21)
|
|
res = hmac_sha512_kdf(prk, hash_len, NULL, (const u8 *) info,
|
|
os_strlen(info), sm->pmk, hash_len);
|
|
forced_memzero(prk, SHA512_MAC_LEN);
|
|
if (res < 0) {
|
|
sm->pmk_len = 0;
|
|
return -1;
|
|
}
|
|
sm->pmk_len = hash_len;
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "OWE: PMK", sm->pmk, sm->pmk_len);
|
|
wpa_hexdump(MSG_DEBUG, "OWE: PMKID", pmkid, PMKID_LEN);
|
|
pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, pmkid, NULL, 0,
|
|
bssid, sm->own_addr, sm->network_ctx, sm->key_mgmt,
|
|
NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_OWE */
|
|
|
|
|
|
void wpa_sm_set_fils_cache_id(struct wpa_sm *sm, const u8 *fils_cache_id)
|
|
{
|
|
#ifdef CONFIG_FILS
|
|
if (sm && fils_cache_id) {
|
|
sm->fils_cache_id_set = 1;
|
|
os_memcpy(sm->fils_cache_id, fils_cache_id, FILS_CACHE_ID_LEN);
|
|
}
|
|
#endif /* CONFIG_FILS */
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_DPP2
|
|
void wpa_sm_set_dpp_z(struct wpa_sm *sm, const struct wpabuf *z)
|
|
{
|
|
if (sm) {
|
|
wpabuf_clear_free(sm->dpp_z);
|
|
sm->dpp_z = z ? wpabuf_dup(z) : NULL;
|
|
}
|
|
}
|
|
#endif /* CONFIG_DPP2 */
|