--- /dev/null
+/*
+ * IEEE 802.1X-2010 KaY Interface
+ * Copyright (c) 2019, The Linux Foundation
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "utils/includes.h"
+
+#include "utils/common.h"
+#include "pae/ieee802_1x_key.h"
+#include "pae/ieee802_1x_kay.h"
+#include "hostapd.h"
+#include "sta_info.h"
+#include "wpa_auth_kay.h"
+#include "ieee802_1x.h"
+
+
+#define DEFAULT_KEY_LEN 16
+/* secure Connectivity Association Key Name (CKN) */
+#define DEFAULT_CKN_LEN 16
+
+
+static int hapd_macsec_init(void *priv, struct macsec_init_params *params)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->macsec_init)
+ return -1;
+ return hapd->driver->macsec_init(hapd->drv_priv, params);
+}
+
+
+static int hapd_macsec_deinit(void *priv)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->macsec_deinit)
+ return -1;
+ return hapd->driver->macsec_deinit(hapd->drv_priv);
+}
+
+
+static int hapd_macsec_get_capability(void *priv, enum macsec_cap *cap)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->macsec_get_capability)
+ return -1;
+ return hapd->driver->macsec_get_capability(hapd->drv_priv, cap);
+}
+
+
+static int hapd_enable_protect_frames(void *priv, Boolean enabled)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->enable_protect_frames)
+ return -1;
+ return hapd->driver->enable_protect_frames(hapd->drv_priv, enabled);
+}
+
+
+static int hapd_enable_encrypt(void *priv, Boolean enabled)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->enable_encrypt)
+ return -1;
+ return hapd->driver->enable_encrypt(hapd->drv_priv, enabled);
+}
+
+
+static int hapd_set_replay_protect(void *priv, Boolean enabled, u32 window)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->set_replay_protect)
+ return -1;
+ return hapd->driver->set_replay_protect(hapd->drv_priv, enabled,
+ window);
+}
+
+
+static int hapd_set_current_cipher_suite(void *priv, u64 cs)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->set_current_cipher_suite)
+ return -1;
+ return hapd->driver->set_current_cipher_suite(hapd->drv_priv, cs);
+}
+
+
+static int hapd_enable_controlled_port(void *priv, Boolean enabled)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->enable_controlled_port)
+ return -1;
+ return hapd->driver->enable_controlled_port(hapd->drv_priv, enabled);
+}
+
+
+static int hapd_get_receive_lowest_pn(void *priv, struct receive_sa *sa)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->get_receive_lowest_pn)
+ return -1;
+ return hapd->driver->get_receive_lowest_pn(hapd->drv_priv, sa);
+}
+
+
+static int hapd_get_transmit_next_pn(void *priv, struct transmit_sa *sa)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->get_transmit_next_pn)
+ return -1;
+ return hapd->driver->get_transmit_next_pn(hapd->drv_priv, sa);
+}
+
+
+static int hapd_set_transmit_next_pn(void *priv, struct transmit_sa *sa)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->set_transmit_next_pn)
+ return -1;
+ return hapd->driver->set_transmit_next_pn(hapd->drv_priv, sa);
+}
+
+
+static unsigned int conf_offset_val(enum confidentiality_offset co)
+{
+ switch (co) {
+ case CONFIDENTIALITY_OFFSET_30:
+ return 30;
+ break;
+ case CONFIDENTIALITY_OFFSET_50:
+ return 50;
+ default:
+ return 0;
+ }
+}
+
+
+static int hapd_create_receive_sc(void *priv, struct receive_sc *sc,
+ enum validate_frames vf,
+ enum confidentiality_offset co)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->create_receive_sc)
+ return -1;
+ return hapd->driver->create_receive_sc(hapd->drv_priv, sc,
+ conf_offset_val(co), vf);
+}
+
+
+static int hapd_delete_receive_sc(void *priv, struct receive_sc *sc)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->delete_receive_sc)
+ return -1;
+ return hapd->driver->delete_receive_sc(hapd->drv_priv, sc);
+}
+
+
+static int hapd_create_receive_sa(void *priv, struct receive_sa *sa)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->create_receive_sa)
+ return -1;
+ return hapd->driver->create_receive_sa(hapd->drv_priv, sa);
+}
+
+
+static int hapd_delete_receive_sa(void *priv, struct receive_sa *sa)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->delete_receive_sa)
+ return -1;
+ return hapd->driver->delete_receive_sa(hapd->drv_priv, sa);
+}
+
+
+static int hapd_enable_receive_sa(void *priv, struct receive_sa *sa)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->enable_receive_sa)
+ return -1;
+ return hapd->driver->enable_receive_sa(hapd->drv_priv, sa);
+}
+
+
+static int hapd_disable_receive_sa(void *priv, struct receive_sa *sa)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->disable_receive_sa)
+ return -1;
+ return hapd->driver->disable_receive_sa(hapd->drv_priv, sa);
+}
+
+
+static int
+hapd_create_transmit_sc(void *priv, struct transmit_sc *sc,
+ enum confidentiality_offset co)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->create_transmit_sc)
+ return -1;
+ return hapd->driver->create_transmit_sc(hapd->drv_priv, sc,
+ conf_offset_val(co));
+}
+
+
+static int hapd_delete_transmit_sc(void *priv, struct transmit_sc *sc)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->delete_transmit_sc)
+ return -1;
+ return hapd->driver->delete_transmit_sc(hapd->drv_priv, sc);
+}
+
+
+static int hapd_create_transmit_sa(void *priv, struct transmit_sa *sa)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->create_transmit_sa)
+ return -1;
+ return hapd->driver->create_transmit_sa(hapd->drv_priv, sa);
+}
+
+
+static int hapd_delete_transmit_sa(void *priv, struct transmit_sa *sa)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->delete_transmit_sa)
+ return -1;
+ return hapd->driver->delete_transmit_sa(hapd->drv_priv, sa);
+}
+
+
+static int hapd_enable_transmit_sa(void *priv, struct transmit_sa *sa)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->enable_transmit_sa)
+ return -1;
+ return hapd->driver->enable_transmit_sa(hapd->drv_priv, sa);
+}
+
+
+static int hapd_disable_transmit_sa(void *priv, struct transmit_sa *sa)
+{
+ struct hostapd_data *hapd = priv;
+
+ if (!hapd->driver->disable_transmit_sa)
+ return -1;
+ return hapd->driver->disable_transmit_sa(hapd->drv_priv, sa);
+}
+
+
+int ieee802_1x_alloc_kay_sm_hapd(struct hostapd_data *hapd,
+ struct sta_info *sta)
+{
+ struct ieee802_1x_kay_ctx *kay_ctx;
+ struct ieee802_1x_kay *res = NULL;
+ enum macsec_policy policy;
+
+ ieee802_1x_dealloc_kay_sm_hapd(hapd);
+
+ if (!hapd->conf || hapd->conf->macsec_policy == 0)
+ return 0;
+
+ if (hapd->conf->macsec_policy == 1) {
+ if (hapd->conf->macsec_integ_only == 1)
+ policy = SHOULD_SECURE;
+ else
+ policy = SHOULD_ENCRYPT;
+ } else {
+ policy = DO_NOT_SECURE;
+ }
+
+ wpa_printf(MSG_DEBUG, "%s: if_name=%s", __func__, hapd->conf->iface);
+ kay_ctx = os_zalloc(sizeof(*kay_ctx));
+ if (!kay_ctx)
+ return -1;
+
+ kay_ctx->ctx = hapd;
+
+ kay_ctx->macsec_init = hapd_macsec_init;
+ kay_ctx->macsec_deinit = hapd_macsec_deinit;
+ kay_ctx->macsec_get_capability = hapd_macsec_get_capability;
+ kay_ctx->enable_protect_frames = hapd_enable_protect_frames;
+ kay_ctx->enable_encrypt = hapd_enable_encrypt;
+ kay_ctx->set_replay_protect = hapd_set_replay_protect;
+ kay_ctx->set_current_cipher_suite = hapd_set_current_cipher_suite;
+ kay_ctx->enable_controlled_port = hapd_enable_controlled_port;
+ kay_ctx->get_receive_lowest_pn = hapd_get_receive_lowest_pn;
+ kay_ctx->get_transmit_next_pn = hapd_get_transmit_next_pn;
+ kay_ctx->set_transmit_next_pn = hapd_set_transmit_next_pn;
+ kay_ctx->create_receive_sc = hapd_create_receive_sc;
+ kay_ctx->delete_receive_sc = hapd_delete_receive_sc;
+ kay_ctx->create_receive_sa = hapd_create_receive_sa;
+ kay_ctx->delete_receive_sa = hapd_delete_receive_sa;
+ kay_ctx->enable_receive_sa = hapd_enable_receive_sa;
+ kay_ctx->disable_receive_sa = hapd_disable_receive_sa;
+ kay_ctx->create_transmit_sc = hapd_create_transmit_sc;
+ kay_ctx->delete_transmit_sc = hapd_delete_transmit_sc;
+ kay_ctx->create_transmit_sa = hapd_create_transmit_sa;
+ kay_ctx->delete_transmit_sa = hapd_delete_transmit_sa;
+ kay_ctx->enable_transmit_sa = hapd_enable_transmit_sa;
+ kay_ctx->disable_transmit_sa = hapd_disable_transmit_sa;
+
+ res = ieee802_1x_kay_init(kay_ctx, policy,
+ hapd->conf->macsec_replay_protect,
+ hapd->conf->macsec_replay_window,
+ hapd->conf->macsec_port,
+ hapd->conf->mka_priority, hapd->conf->iface,
+ hapd->own_addr);
+ /* ieee802_1x_kay_init() frees kay_ctx on failure */
+ if (!res)
+ return -1;
+
+ hapd->kay = res;
+
+ return 0;
+}
+
+
+void ieee802_1x_dealloc_kay_sm_hapd(struct hostapd_data *hapd)
+{
+ if (!hapd->kay)
+ return;
+
+ ieee802_1x_kay_deinit(hapd->kay);
+ hapd->kay = NULL;
+}
+
+
+static int ieee802_1x_auth_get_session_id(struct hostapd_data *hapd,
+ struct sta_info *sta, u8 *sid,
+ size_t *len)
+{
+ const u8 *session_id;
+ size_t id_len, need_len;
+
+ session_id = ieee802_1x_get_session_id(sta->eapol_sm, &id_len);
+ if (!session_id) {
+ wpa_printf(MSG_DEBUG,
+ "MACsec: Failed to get SessionID from EAPOL state machines");
+ return -1;
+ }
+
+ need_len = 1 + 2 * 32 /* random size */;
+ if (need_len > id_len) {
+ wpa_printf(MSG_DEBUG, "EAP Session-Id not long enough");
+ return -1;
+ }
+
+ os_memcpy(sid, session_id, need_len);
+ *len = need_len;
+
+ return 0;
+}
+
+
+static int ieee802_1x_auth_get_msk(struct hostapd_data *hapd,
+ struct sta_info *sta, u8 *msk, size_t *len)
+{
+ const u8 *key;
+ size_t keylen;
+
+ if (!sta->eapol_sm)
+ return -1;
+
+ key = ieee802_1x_get_key(sta->eapol_sm, &keylen);
+ if (key == NULL) {
+ wpa_printf(MSG_DEBUG,
+ "MACsec: Failed to get MSK from EAPOL state machines");
+ return -1;
+ }
+ wpa_printf(MSG_DEBUG, "MACsec: Successfully fetched key (len=%lu)",
+ (unsigned long) keylen);
+ wpa_hexdump_key(MSG_DEBUG, "MSK: ", key, keylen);
+
+ if (keylen > *len)
+ keylen = *len;
+ os_memcpy(msk, key, keylen);
+ *len = keylen;
+
+ return 0;
+}
+
+
+void * ieee802_1x_notify_create_actor_hapd(struct hostapd_data *hapd,
+ struct sta_info *sta)
+{
+ u8 *sid;
+ size_t sid_len = 128;
+ struct mka_key_name *ckn;
+ struct mka_key *cak;
+ struct mka_key *msk;
+ void *res = NULL;
+
+ if (!hapd->kay || hapd->kay->policy == DO_NOT_SECURE)
+ return NULL;
+
+ wpa_printf(MSG_DEBUG,
+ "IEEE 802.1X: External notification - Create MKA for "
+ MACSTR, MAC2STR(sta->addr));
+
+ msk = os_zalloc(sizeof(*msk));
+ sid = os_zalloc(sid_len);
+ ckn = os_zalloc(sizeof(*ckn));
+ cak = os_zalloc(sizeof(*cak));
+ if (!msk || !sid || !ckn || !cak)
+ goto fail;
+
+ msk->len = DEFAULT_KEY_LEN;
+ if (ieee802_1x_auth_get_msk(hapd, sta, msk->key, &msk->len)) {
+ wpa_printf(MSG_ERROR, "IEEE 802.1X: Could not get MSK");
+ goto fail;
+ }
+
+ if (ieee802_1x_auth_get_session_id(hapd, sta, sid, &sid_len))
+ {
+ wpa_printf(MSG_ERROR,
+ "IEEE 802.1X: Could not get EAP Session Id");
+ goto fail;
+ }
+
+ wpa_hexdump(MSG_DEBUG, "own_addr", hapd->own_addr, ETH_ALEN);
+ wpa_hexdump(MSG_DEBUG, "sta_addr", sta->addr, ETH_ALEN);
+
+ /* Derive CAK from MSK */
+ cak->len = DEFAULT_KEY_LEN;
+ if (ieee802_1x_cak_aes_cmac(msk->key, msk->len, hapd->own_addr,
+ sta->addr, cak->key, cak->len)) {
+ wpa_printf(MSG_ERROR, "IEEE 802.1X: Deriving CAK failed");
+ goto fail;
+ }
+ wpa_hexdump_key(MSG_DEBUG, "Derived CAK", cak->key, cak->len);
+
+ /* Derive CKN from MSK */
+ ckn->len = DEFAULT_CKN_LEN;
+ if (ieee802_1x_ckn_aes_cmac(msk->key, msk->len, hapd->own_addr,
+ sta->addr, sid, sid_len, ckn->name)) {
+ wpa_printf(MSG_ERROR, "IEEE 802.1X: Deriving CKN failed");
+ goto fail;
+ }
+ wpa_hexdump(MSG_DEBUG, "Derived CKN", ckn->name, ckn->len);
+
+ res = ieee802_1x_kay_create_mka(hapd->kay, ckn, cak, 0, EAP_EXCHANGE,
+ TRUE);
+
+fail:
+ bin_clear_free(msk, sizeof(*msk));
+ os_free(sid);
+ os_free(ckn);
+ bin_clear_free(cak, sizeof(*cak));
+
+ return res;
+}
+
+
+void * ieee802_1x_create_preshared_mka_hapd(struct hostapd_data *hapd,
+ struct sta_info *sta)
+{
+ struct mka_key *cak;
+ struct mka_key_name *ckn;
+ void *res = NULL;
+
+ if ((hapd->conf->mka_psk_set & MKA_PSK_SET) != MKA_PSK_SET)
+ goto end;
+
+ ckn = os_zalloc(sizeof(*ckn));
+ if (!ckn)
+ goto end;
+
+ cak = os_zalloc(sizeof(*cak));
+ if (!cak)
+ goto free_ckn;
+
+ if (ieee802_1x_alloc_kay_sm_hapd(hapd, sta) < 0 || !hapd->kay)
+ goto free_cak;
+
+ if (hapd->kay->policy == DO_NOT_SECURE)
+ goto dealloc;
+
+ cak->len = hapd->conf->mka_cak_len;
+ os_memcpy(cak->key, hapd->conf->mka_cak, cak->len);
+
+ ckn->len = hapd->conf->mka_ckn_len;;
+ os_memcpy(ckn->name, hapd->conf->mka_ckn, ckn->len);
+
+ res = ieee802_1x_kay_create_mka(hapd->kay, ckn, cak, 0, PSK, TRUE);
+ if (res)
+ goto free_cak;
+
+dealloc:
+ /* Failed to create MKA */
+ ieee802_1x_dealloc_kay_sm_hapd(hapd);
+free_cak:
+ os_free(cak);
+free_ckn:
+ os_free(ckn);
+end:
+ return res;
+}
projects / thirdparty / hostap.git / commitdiff
