/* * hostapd / IEEE 802.1X-2004 Authenticator * Copyright (c) 2002-2012, Jouni Malinen * * 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 "utils/eloop.h" #include "crypto/md5.h" #include "crypto/crypto.h" #include "crypto/random.h" #include "common/ieee802_11_defs.h" #include "radius/radius.h" #include "radius/radius_client.h" #include "eap_server/eap.h" #include "eap_common/eap_wsc_common.h" #include "eapol_auth/eapol_auth_sm.h" #include "eapol_auth/eapol_auth_sm_i.h" #include "p2p/p2p.h" #include "hostapd.h" #include "accounting.h" #include "sta_info.h" #include "wpa_auth.h" #include "preauth_auth.h" #include "pmksa_cache_auth.h" #include "ap_config.h" #include "ap_drv_ops.h" #include "wps_hostapd.h" #include "hs20.h" #include "ieee802_1x.h" static void ieee802_1x_finished(struct hostapd_data *hapd, struct sta_info *sta, int success, int remediation); static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta, u8 type, const u8 *data, size_t datalen) { u8 *buf; struct ieee802_1x_hdr *xhdr; size_t len; int encrypt = 0; len = sizeof(*xhdr) + datalen; buf = os_zalloc(len); if (buf == NULL) { wpa_printf(MSG_ERROR, "malloc() failed for " "ieee802_1x_send(len=%lu)", (unsigned long) len); return; } xhdr = (struct ieee802_1x_hdr *) buf; xhdr->version = hapd->conf->eapol_version; xhdr->type = type; xhdr->length = host_to_be16(datalen); if (datalen > 0 && data != NULL) os_memcpy(xhdr + 1, data, datalen); if (wpa_auth_pairwise_set(sta->wpa_sm)) encrypt = 1; #ifdef CONFIG_TESTING_OPTIONS if (hapd->ext_eapol_frame_io) { size_t hex_len = 2 * len + 1; char *hex = os_malloc(hex_len); if (hex) { wpa_snprintf_hex(hex, hex_len, buf, len); wpa_msg(hapd->msg_ctx, MSG_INFO, "EAPOL-TX " MACSTR " %s", MAC2STR(sta->addr), hex); os_free(hex); } } else #endif /* CONFIG_TESTING_OPTIONS */ if (sta->flags & WLAN_STA_PREAUTH) { rsn_preauth_send(hapd, sta, buf, len); } else { hostapd_drv_hapd_send_eapol( hapd, sta->addr, buf, len, encrypt, hostapd_sta_flags_to_drv(sta->flags)); } os_free(buf); } void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd, struct sta_info *sta, int authorized) { int res; if (sta->flags & WLAN_STA_PREAUTH) return; if (authorized) { ap_sta_set_authorized(hapd, sta, 1); res = hostapd_set_authorized(hapd, sta, 1); hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "authorizing port"); } else { ap_sta_set_authorized(hapd, sta, 0); res = hostapd_set_authorized(hapd, sta, 0); hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "unauthorizing port"); } if (res && errno != ENOENT) { wpa_printf(MSG_DEBUG, "Could not set station " MACSTR " flags for kernel driver (errno=%d).", MAC2STR(sta->addr), errno); } if (authorized) { os_get_reltime(&sta->connected_time); accounting_sta_start(hapd, sta); } } static void ieee802_1x_tx_key_one(struct hostapd_data *hapd, struct sta_info *sta, int idx, int broadcast, u8 *key_data, size_t key_len) { u8 *buf, *ekey; struct ieee802_1x_hdr *hdr; struct ieee802_1x_eapol_key *key; size_t len, ekey_len; struct eapol_state_machine *sm = sta->eapol_sm; if (sm == NULL) return; len = sizeof(*key) + key_len; buf = os_zalloc(sizeof(*hdr) + len); if (buf == NULL) return; hdr = (struct ieee802_1x_hdr *) buf; key = (struct ieee802_1x_eapol_key *) (hdr + 1); key->type = EAPOL_KEY_TYPE_RC4; WPA_PUT_BE16(key->key_length, key_len); wpa_get_ntp_timestamp(key->replay_counter); if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) { wpa_printf(MSG_ERROR, "Could not get random numbers"); os_free(buf); return; } key->key_index = idx | (broadcast ? 0 : BIT(7)); if (hapd->conf->eapol_key_index_workaround) { /* According to some information, WinXP Supplicant seems to * interpret bit7 as an indication whether the key is to be * activated, so make it possible to enable workaround that * sets this bit for all keys. */ key->key_index |= BIT(7); } /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and * MSK[32..63] is used to sign the message. */ if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) { wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting " "and signing EAPOL-Key"); os_free(buf); return; } os_memcpy((u8 *) (key + 1), key_data, key_len); ekey_len = sizeof(key->key_iv) + 32; ekey = os_malloc(ekey_len); if (ekey == NULL) { wpa_printf(MSG_ERROR, "Could not encrypt key"); os_free(buf); return; } os_memcpy(ekey, key->key_iv, sizeof(key->key_iv)); os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32); rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len); os_free(ekey); /* This header is needed here for HMAC-MD5, but it will be regenerated * in ieee802_1x_send() */ hdr->version = hapd->conf->eapol_version; hdr->type = IEEE802_1X_TYPE_EAPOL_KEY; hdr->length = host_to_be16(len); hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len, key->key_signature); wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR " (%s index=%d)", MAC2STR(sm->addr), broadcast ? "broadcast" : "unicast", idx); ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len); if (sta->eapol_sm) sta->eapol_sm->dot1xAuthEapolFramesTx++; os_free(buf); } void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta) { struct eapol_authenticator *eapol = hapd->eapol_auth; struct eapol_state_machine *sm = sta->eapol_sm; if (sm == NULL || !sm->eap_if->eapKeyData) return; wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR, MAC2STR(sta->addr)); #ifndef CONFIG_NO_VLAN if (sta->vlan_id > 0 && sta->vlan_id <= MAX_VLAN_ID) { wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported."); return; } #endif /* CONFIG_NO_VLAN */ if (eapol->default_wep_key) { ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1, eapol->default_wep_key, hapd->conf->default_wep_key_len); } if (hapd->conf->individual_wep_key_len > 0) { u8 *ikey; ikey = os_malloc(hapd->conf->individual_wep_key_len); if (ikey == NULL || random_get_bytes(ikey, hapd->conf->individual_wep_key_len)) { wpa_printf(MSG_ERROR, "Could not generate random " "individual WEP key."); os_free(ikey); return; } wpa_hexdump_key(MSG_DEBUG, "Individual WEP key", ikey, hapd->conf->individual_wep_key_len); ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey, hapd->conf->individual_wep_key_len); /* TODO: set encryption in TX callback, i.e., only after STA * has ACKed EAPOL-Key frame */ if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP, sta->addr, 0, 1, NULL, 0, ikey, hapd->conf->individual_wep_key_len)) { wpa_printf(MSG_ERROR, "Could not set individual WEP " "encryption."); } os_free(ikey); } } const char *radius_mode_txt(struct hostapd_data *hapd) { switch (hapd->iface->conf->hw_mode) { case HOSTAPD_MODE_IEEE80211AD: return "802.11ad"; case HOSTAPD_MODE_IEEE80211A: return "802.11a"; case HOSTAPD_MODE_IEEE80211G: return "802.11g"; case HOSTAPD_MODE_IEEE80211B: default: return "802.11b"; } } int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta) { int i; u8 rate = 0; for (i = 0; i < sta->supported_rates_len; i++) if ((sta->supported_rates[i] & 0x7f) > rate) rate = sta->supported_rates[i] & 0x7f; return rate; } #ifndef CONFIG_NO_RADIUS static void ieee802_1x_learn_identity(struct hostapd_data *hapd, struct eapol_state_machine *sm, const u8 *eap, size_t len) { const u8 *identity; size_t identity_len; const struct eap_hdr *hdr = (const struct eap_hdr *) eap; if (len <= sizeof(struct eap_hdr) || (hdr->code == EAP_CODE_RESPONSE && eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY) || (hdr->code == EAP_CODE_INITIATE && eap[sizeof(struct eap_hdr)] != EAP_ERP_TYPE_REAUTH) || (hdr->code != EAP_CODE_RESPONSE && hdr->code != EAP_CODE_INITIATE)) return; identity = eap_get_identity(sm->eap, &identity_len); if (identity == NULL) return; /* Save station identity for future RADIUS packets */ os_free(sm->identity); sm->identity = (u8 *) dup_binstr(identity, identity_len); if (sm->identity == NULL) { sm->identity_len = 0; return; } sm->identity_len = identity_len; hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity); sm->dot1xAuthEapolRespIdFramesRx++; } static int add_common_radius_sta_attr_rsn(struct hostapd_data *hapd, struct hostapd_radius_attr *req_attr, struct sta_info *sta, struct radius_msg *msg) { u32 suite; int ver, val; ver = wpa_auth_sta_wpa_version(sta->wpa_sm); val = wpa_auth_get_pairwise(sta->wpa_sm); suite = wpa_cipher_to_suite(ver, val); if (val != -1 && !hostapd_config_get_radius_attr(req_attr, RADIUS_ATTR_WLAN_PAIRWISE_CIPHER) && !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_PAIRWISE_CIPHER, suite)) { wpa_printf(MSG_ERROR, "Could not add WLAN-Pairwise-Cipher"); return -1; } suite = wpa_cipher_to_suite((hapd->conf->wpa & 0x2) ? WPA_PROTO_RSN : WPA_PROTO_WPA, hapd->conf->wpa_group); if (!hostapd_config_get_radius_attr(req_attr, RADIUS_ATTR_WLAN_GROUP_CIPHER) && !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_GROUP_CIPHER, suite)) { wpa_printf(MSG_ERROR, "Could not add WLAN-Group-Cipher"); return -1; } val = wpa_auth_sta_key_mgmt(sta->wpa_sm); suite = wpa_akm_to_suite(val); if (val != -1 && !hostapd_config_get_radius_attr(req_attr, RADIUS_ATTR_WLAN_AKM_SUITE) && !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_AKM_SUITE, suite)) { wpa_printf(MSG_ERROR, "Could not add WLAN-AKM-Suite"); return -1; } #ifdef CONFIG_IEEE80211W if (hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) { suite = wpa_cipher_to_suite(WPA_PROTO_RSN, hapd->conf->group_mgmt_cipher); if (!hostapd_config_get_radius_attr( req_attr, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER) && !radius_msg_add_attr_int32( msg, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER, suite)) { wpa_printf(MSG_ERROR, "Could not add WLAN-Group-Mgmt-Cipher"); return -1; } } #endif /* CONFIG_IEEE80211W */ return 0; } static int add_common_radius_sta_attr(struct hostapd_data *hapd, struct hostapd_radius_attr *req_attr, struct sta_info *sta, struct radius_msg *msg) { char buf[128]; if (!hostapd_config_get_radius_attr(req_attr, RADIUS_ATTR_NAS_PORT) && !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) { wpa_printf(MSG_ERROR, "Could not add NAS-Port"); return -1; } os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT, MAC2STR(sta->addr)); buf[sizeof(buf) - 1] = '\0'; if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID, (u8 *) buf, os_strlen(buf))) { wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id"); return -1; } if (sta->flags & WLAN_STA_PREAUTH) { os_strlcpy(buf, "IEEE 802.11i Pre-Authentication", sizeof(buf)); } else { os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s", radius_sta_rate(hapd, sta) / 2, (radius_sta_rate(hapd, sta) & 1) ? ".5" : "", radius_mode_txt(hapd)); buf[sizeof(buf) - 1] = '\0'; } if (!hostapd_config_get_radius_attr(req_attr, RADIUS_ATTR_CONNECT_INFO) && !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO, (u8 *) buf, os_strlen(buf))) { wpa_printf(MSG_ERROR, "Could not add Connect-Info"); return -1; } if (sta->acct_session_id_hi || sta->acct_session_id_lo) { os_snprintf(buf, sizeof(buf), "%08X-%08X", sta->acct_session_id_hi, sta->acct_session_id_lo); if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID, (u8 *) buf, os_strlen(buf))) { wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id"); return -1; } } #ifdef CONFIG_IEEE80211R if (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) && sta->wpa_sm && (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm)) || sta->auth_alg == WLAN_AUTH_FT) && !hostapd_config_get_radius_attr(req_attr, RADIUS_ATTR_MOBILITY_DOMAIN_ID) && !radius_msg_add_attr_int32(msg, RADIUS_ATTR_MOBILITY_DOMAIN_ID, WPA_GET_BE16( hapd->conf->mobility_domain))) { wpa_printf(MSG_ERROR, "Could not add Mobility-Domain-Id"); return -1; } #endif /* CONFIG_IEEE80211R */ if (hapd->conf->wpa && sta->wpa_sm && add_common_radius_sta_attr_rsn(hapd, req_attr, sta, msg) < 0) return -1; return 0; } int add_common_radius_attr(struct hostapd_data *hapd, struct hostapd_radius_attr *req_attr, struct sta_info *sta, struct radius_msg *msg) { char buf[128]; struct hostapd_radius_attr *attr; if (!hostapd_config_get_radius_attr(req_attr, RADIUS_ATTR_NAS_IP_ADDRESS) && hapd->conf->own_ip_addr.af == AF_INET && !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS, (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) { wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address"); return -1; } #ifdef CONFIG_IPV6 if (!hostapd_config_get_radius_attr(req_attr, RADIUS_ATTR_NAS_IPV6_ADDRESS) && hapd->conf->own_ip_addr.af == AF_INET6 && !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS, (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) { wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address"); return -1; } #endif /* CONFIG_IPV6 */ if (!hostapd_config_get_radius_attr(req_attr, RADIUS_ATTR_NAS_IDENTIFIER) && hapd->conf->nas_identifier && !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER, (u8 *) hapd->conf->nas_identifier, os_strlen(hapd->conf->nas_identifier))) { wpa_printf(MSG_ERROR, "Could not add NAS-Identifier"); return -1; } os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s", MAC2STR(hapd->own_addr), wpa_ssid_txt(hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len)); buf[sizeof(buf) - 1] = '\0'; if (!hostapd_config_get_radius_attr(req_attr, RADIUS_ATTR_CALLED_STATION_ID) && !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID, (u8 *) buf, os_strlen(buf))) { wpa_printf(MSG_ERROR, "Could not add Called-Station-Id"); return -1; } if (!hostapd_config_get_radius_attr(req_attr, RADIUS_ATTR_NAS_PORT_TYPE) && !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE, RADIUS_NAS_PORT_TYPE_IEEE_802_11)) { wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type"); return -1; } #ifdef CONFIG_INTERWORKING if (hapd->conf->interworking && !is_zero_ether_addr(hapd->conf->hessid)) { os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT, MAC2STR(hapd->conf->hessid)); buf[sizeof(buf) - 1] = '\0'; if (!hostapd_config_get_radius_attr(req_attr, RADIUS_ATTR_WLAN_HESSID) && !radius_msg_add_attr(msg, RADIUS_ATTR_WLAN_HESSID, (u8 *) buf, os_strlen(buf))) { wpa_printf(MSG_ERROR, "Could not add WLAN-HESSID"); return -1; } } #endif /* CONFIG_INTERWORKING */ if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0) return -1; for (attr = req_attr; attr; attr = attr->next) { if (!radius_msg_add_attr(msg, attr->type, wpabuf_head(attr->val), wpabuf_len(attr->val))) { wpa_printf(MSG_ERROR, "Could not add RADIUS " "attribute"); return -1; } } return 0; } static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd, struct sta_info *sta, const u8 *eap, size_t len) { struct radius_msg *msg; struct eapol_state_machine *sm = sta->eapol_sm; if (sm == NULL) return; ieee802_1x_learn_identity(hapd, sm, eap, len); wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS " "packet"); sm->radius_identifier = radius_client_get_id(hapd->radius); msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST, sm->radius_identifier); if (msg == NULL) { wpa_printf(MSG_INFO, "Could not create new RADIUS packet"); return; } radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta)); if (sm->identity && !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, sm->identity, sm->identity_len)) { wpa_printf(MSG_INFO, "Could not add User-Name"); goto fail; } if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta, msg) < 0) goto fail; /* TODO: should probably check MTU from driver config; 2304 is max for * IEEE 802.11, but use 1400 to avoid problems with too large packets */ if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr, RADIUS_ATTR_FRAMED_MTU) && !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) { wpa_printf(MSG_INFO, "Could not add Framed-MTU"); goto fail; } if (eap && !radius_msg_add_eap(msg, eap, len)) { wpa_printf(MSG_INFO, "Could not add EAP-Message"); goto fail; } /* State attribute must be copied if and only if this packet is * Access-Request reply to the previous Access-Challenge */ if (sm->last_recv_radius && radius_msg_get_hdr(sm->last_recv_radius)->code == RADIUS_CODE_ACCESS_CHALLENGE) { int res = radius_msg_copy_attr(msg, sm->last_recv_radius, RADIUS_ATTR_STATE); if (res < 0) { wpa_printf(MSG_INFO, "Could not copy State attribute from previous Access-Challenge"); goto fail; } if (res > 0) { wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute"); } } if (hapd->conf->radius_request_cui) { const u8 *cui; size_t cui_len; /* Add previously learned CUI or nul CUI to request CUI */ if (sm->radius_cui) { cui = wpabuf_head(sm->radius_cui); cui_len = wpabuf_len(sm->radius_cui); } else { cui = (const u8 *) "\0"; cui_len = 1; } if (!radius_msg_add_attr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY, cui, cui_len)) { wpa_printf(MSG_ERROR, "Could not add CUI"); goto fail; } } #ifdef CONFIG_HS20 if (hapd->conf->hs20) { u8 ver = 1; /* Release 2 */ if (!radius_msg_add_wfa( msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION, &ver, 1)) { wpa_printf(MSG_ERROR, "Could not add HS 2.0 AP " "version"); goto fail; } if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) { const u8 *pos; u8 buf[3]; u16 id; pos = wpabuf_head_u8(sta->hs20_ie); buf[0] = (*pos) >> 4; if (((*pos) & HS20_PPS_MO_ID_PRESENT) && wpabuf_len(sta->hs20_ie) >= 3) id = WPA_GET_LE16(pos + 1); else id = 0; WPA_PUT_BE16(buf + 1, id); if (!radius_msg_add_wfa( msg, RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION, buf, sizeof(buf))) { wpa_printf(MSG_ERROR, "Could not add HS 2.0 " "STA version"); goto fail; } } } #endif /* CONFIG_HS20 */ if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0) goto fail; return; fail: radius_msg_free(msg); } #endif /* CONFIG_NO_RADIUS */ static void handle_eap_response(struct hostapd_data *hapd, struct sta_info *sta, struct eap_hdr *eap, size_t len) { u8 type, *data; struct eapol_state_machine *sm = sta->eapol_sm; if (sm == NULL) return; data = (u8 *) (eap + 1); if (len < sizeof(*eap) + 1) { wpa_printf(MSG_INFO, "handle_eap_response: too short response data"); return; } sm->eap_type_supp = type = data[0]; hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d " "id=%d len=%d) from STA: EAP Response-%s (%d)", eap->code, eap->identifier, be_to_host16(eap->length), eap_server_get_name(0, type), type); sm->dot1xAuthEapolRespFramesRx++; wpabuf_free(sm->eap_if->eapRespData); sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len); sm->eapolEap = TRUE; } static void handle_eap_initiate(struct hostapd_data *hapd, struct sta_info *sta, struct eap_hdr *eap, size_t len) { #ifdef CONFIG_ERP u8 type, *data; struct eapol_state_machine *sm = sta->eapol_sm; if (sm == NULL) return; if (len < sizeof(*eap) + 1) { wpa_printf(MSG_INFO, "handle_eap_initiate: too short response data"); return; } data = (u8 *) (eap + 1); type = data[0]; hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d " "id=%d len=%d) from STA: EAP Initiate type %u", eap->code, eap->identifier, be_to_host16(eap->length), type); wpabuf_free(sm->eap_if->eapRespData); sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len); sm->eapolEap = TRUE; #endif /* CONFIG_ERP */ } /* Process incoming EAP packet from Supplicant */ static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta, u8 *buf, size_t len) { struct eap_hdr *eap; u16 eap_len; if (len < sizeof(*eap)) { wpa_printf(MSG_INFO, " too short EAP packet"); return; } eap = (struct eap_hdr *) buf; eap_len = be_to_host16(eap->length); wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d", eap->code, eap->identifier, eap_len); if (eap_len < sizeof(*eap)) { wpa_printf(MSG_DEBUG, " Invalid EAP length"); return; } else if (eap_len > len) { wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP " "packet"); return; } else if (eap_len < len) { wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP " "packet", (unsigned long) len - eap_len); } switch (eap->code) { case EAP_CODE_REQUEST: wpa_printf(MSG_DEBUG, " (request)"); return; case EAP_CODE_RESPONSE: wpa_printf(MSG_DEBUG, " (response)"); handle_eap_response(hapd, sta, eap, eap_len); break; case EAP_CODE_SUCCESS: wpa_printf(MSG_DEBUG, " (success)"); return; case EAP_CODE_FAILURE: wpa_printf(MSG_DEBUG, " (failure)"); return; case EAP_CODE_INITIATE: wpa_printf(MSG_DEBUG, " (initiate)"); handle_eap_initiate(hapd, sta, eap, eap_len); break; case EAP_CODE_FINISH: wpa_printf(MSG_DEBUG, " (finish)"); break; default: wpa_printf(MSG_DEBUG, " (unknown code)"); return; } } static struct eapol_state_machine * ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta) { int flags = 0; if (sta->flags & WLAN_STA_PREAUTH) flags |= EAPOL_SM_PREAUTH; if (sta->wpa_sm) { flags |= EAPOL_SM_USES_WPA; if (wpa_auth_sta_get_pmksa(sta->wpa_sm)) flags |= EAPOL_SM_FROM_PMKSA_CACHE; } return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags, sta->wps_ie, sta->p2p_ie, sta, sta->identity, sta->radius_cui); } /** * ieee802_1x_receive - Process the EAPOL frames from the Supplicant * @hapd: hostapd BSS data * @sa: Source address (sender of the EAPOL frame) * @buf: EAPOL frame * @len: Length of buf in octets * * This function is called for each incoming EAPOL frame from the interface */ void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf, size_t len) { struct sta_info *sta; struct ieee802_1x_hdr *hdr; struct ieee802_1x_eapol_key *key; u16 datalen; struct rsn_pmksa_cache_entry *pmksa; int key_mgmt; if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen && !hapd->conf->wps_state) return; wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR, (unsigned long) len, MAC2STR(sa)); sta = ap_get_sta(hapd, sa); if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) && !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) { wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not " "associated/Pre-authenticating STA"); return; } if (len < sizeof(*hdr)) { wpa_printf(MSG_INFO, " too short IEEE 802.1X packet"); return; } hdr = (struct ieee802_1x_hdr *) buf; datalen = be_to_host16(hdr->length); wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d", hdr->version, hdr->type, datalen); if (len - sizeof(*hdr) < datalen) { wpa_printf(MSG_INFO, " frame too short for this IEEE 802.1X packet"); if (sta->eapol_sm) sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++; return; } if (len - sizeof(*hdr) > datalen) { wpa_printf(MSG_DEBUG, " ignoring %lu extra octets after " "IEEE 802.1X packet", (unsigned long) len - sizeof(*hdr) - datalen); } if (sta->eapol_sm) { sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version; sta->eapol_sm->dot1xAuthEapolFramesRx++; } key = (struct ieee802_1x_eapol_key *) (hdr + 1); if (datalen >= sizeof(struct ieee802_1x_eapol_key) && hdr->type == IEEE802_1X_TYPE_EAPOL_KEY && (key->type == EAPOL_KEY_TYPE_WPA || key->type == EAPOL_KEY_TYPE_RSN)) { wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr, sizeof(*hdr) + datalen); return; } if (!hapd->conf->ieee802_1x && !hapd->conf->osen && !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) { wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - " "802.1X not enabled and WPS not used"); return; } key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm); if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) { wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - " "STA is using PSK"); return; } if (!sta->eapol_sm) { sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta); if (!sta->eapol_sm) return; #ifdef CONFIG_WPS if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) { u32 wflags = sta->flags & (WLAN_STA_WPS | WLAN_STA_WPS2 | WLAN_STA_MAYBE_WPS); if (wflags == WLAN_STA_MAYBE_WPS || wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) { /* * Delay EAPOL frame transmission until a * possible WPS STA initiates the handshake * with EAPOL-Start. Only allow the wait to be * skipped if the STA is known to support WPS * 2.0. */ wpa_printf(MSG_DEBUG, "WPS: Do not start " "EAPOL until EAPOL-Start is " "received"); sta->eapol_sm->flags |= EAPOL_SM_WAIT_START; } } #endif /* CONFIG_WPS */ sta->eapol_sm->eap_if->portEnabled = TRUE; } /* since we support version 1, we can ignore version field and proceed * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */ /* TODO: actually, we are not version 1 anymore.. However, Version 2 * does not change frame contents, so should be ok to process frames * more or less identically. Some changes might be needed for * verification of fields. */ switch (hdr->type) { case IEEE802_1X_TYPE_EAP_PACKET: handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen); break; case IEEE802_1X_TYPE_EAPOL_START: hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start " "from STA"); sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START; pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm); if (pmksa) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, HOSTAPD_LEVEL_DEBUG, "cached PMKSA " "available - ignore it since " "STA sent EAPOL-Start"); wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa); } sta->eapol_sm->eapolStart = TRUE; sta->eapol_sm->dot1xAuthEapolStartFramesRx++; eap_server_clear_identity(sta->eapol_sm->eap); wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL); break; case IEEE802_1X_TYPE_EAPOL_LOGOFF: hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff " "from STA"); sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; accounting_sta_stop(hapd, sta); sta->eapol_sm->eapolLogoff = TRUE; sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++; eap_server_clear_identity(sta->eapol_sm->eap); break; case IEEE802_1X_TYPE_EAPOL_KEY: wpa_printf(MSG_DEBUG, " EAPOL-Key"); if (!ap_sta_is_authorized(sta)) { wpa_printf(MSG_DEBUG, " Dropped key data from " "unauthorized Supplicant"); break; } break; case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT: wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert"); /* TODO: implement support for this; show data */ break; default: wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type"); sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++; break; } eapol_auth_step(sta->eapol_sm); } /** * ieee802_1x_new_station - Start IEEE 802.1X authentication * @hapd: hostapd BSS data * @sta: The station * * This function is called to start IEEE 802.1X authentication when a new * station completes IEEE 802.11 association. */ void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta) { struct rsn_pmksa_cache_entry *pmksa; int reassoc = 1; int force_1x = 0; int key_mgmt; #ifdef CONFIG_WPS if (hapd->conf->wps_state && ((hapd->conf->wpa && (sta->flags & WLAN_STA_MAYBE_WPS)) || (sta->flags & WLAN_STA_WPS))) { /* * Need to enable IEEE 802.1X/EAPOL state machines for possible * WPS handshake even if IEEE 802.1X/EAPOL is not used for * authentication in this BSS. */ force_1x = 1; } #endif /* CONFIG_WPS */ if (!force_1x && !hapd->conf->ieee802_1x && !hapd->conf->osen) { wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - " "802.1X not enabled or forced for WPS"); /* * Clear any possible EAPOL authenticator state to support * reassociation change from WPS to PSK. */ ieee802_1x_free_station(sta); return; } key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm); if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) { wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK"); /* * Clear any possible EAPOL authenticator state to support * reassociation change from WPA-EAP to PSK. */ ieee802_1x_free_station(sta); return; } if (sta->eapol_sm == NULL) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "start authentication"); sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta); if (sta->eapol_sm == NULL) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_INFO, "failed to allocate state machine"); return; } reassoc = 0; } #ifdef CONFIG_WPS sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START; if (!hapd->conf->ieee802_1x && hapd->conf->wps_state && !(sta->flags & WLAN_STA_WPS2)) { /* * Delay EAPOL frame transmission until a possible WPS STA * initiates the handshake with EAPOL-Start. Only allow the * wait to be skipped if the STA is known to support WPS 2.0. */ wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until " "EAPOL-Start is received"); sta->eapol_sm->flags |= EAPOL_SM_WAIT_START; } #endif /* CONFIG_WPS */ sta->eapol_sm->eap_if->portEnabled = TRUE; #ifdef CONFIG_IEEE80211R if (sta->auth_alg == WLAN_AUTH_FT) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "PMK from FT - skip IEEE 802.1X/EAP"); /* Setup EAPOL state machines to already authenticated state * because of existing FT information from R0KH. */ sta->eapol_sm->keyRun = TRUE; sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING; sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS; sta->eapol_sm->authSuccess = TRUE; sta->eapol_sm->authFail = FALSE; if (sta->eapol_sm->eap) eap_sm_notify_cached(sta->eapol_sm->eap); /* TODO: get vlan_id from R0KH using RRB message */ return; } #endif /* CONFIG_IEEE80211R */ pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm); if (pmksa) { int old_vlanid; hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "PMK from PMKSA cache - skip IEEE 802.1X/EAP"); /* Setup EAPOL state machines to already authenticated state * because of existing PMKSA information in the cache. */ sta->eapol_sm->keyRun = TRUE; sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING; sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS; sta->eapol_sm->authSuccess = TRUE; sta->eapol_sm->authFail = FALSE; if (sta->eapol_sm->eap) eap_sm_notify_cached(sta->eapol_sm->eap); old_vlanid = sta->vlan_id; pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm); if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED) sta->vlan_id = 0; ap_sta_bind_vlan(hapd, sta, old_vlanid); } else { if (reassoc) { /* * Force EAPOL state machines to start * re-authentication without having to wait for the * Supplicant to send EAPOL-Start. */ sta->eapol_sm->reAuthenticate = TRUE; } eapol_auth_step(sta->eapol_sm); } } void ieee802_1x_free_station(struct sta_info *sta) { struct eapol_state_machine *sm = sta->eapol_sm; if (sm == NULL) return; sta->eapol_sm = NULL; #ifndef CONFIG_NO_RADIUS radius_msg_free(sm->last_recv_radius); radius_free_class(&sm->radius_class); wpabuf_free(sm->radius_cui); #endif /* CONFIG_NO_RADIUS */ os_free(sm->identity); eapol_auth_free(sm); } #ifndef CONFIG_NO_RADIUS static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd, struct sta_info *sta) { struct wpabuf *eap; const struct eap_hdr *hdr; int eap_type = -1; char buf[64]; struct radius_msg *msg; struct eapol_state_machine *sm = sta->eapol_sm; if (sm == NULL || sm->last_recv_radius == NULL) { if (sm) sm->eap_if->aaaEapNoReq = TRUE; return; } msg = sm->last_recv_radius; eap = radius_msg_get_eap(msg); if (eap == NULL) { /* RFC 3579, Chap. 2.6.3: * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message * attribute */ hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_WARNING, "could not extract " "EAP-Message from RADIUS message"); sm->eap_if->aaaEapNoReq = TRUE; return; } if (wpabuf_len(eap) < sizeof(*hdr)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_WARNING, "too short EAP packet " "received from authentication server"); wpabuf_free(eap); sm->eap_if->aaaEapNoReq = TRUE; return; } if (wpabuf_len(eap) > sizeof(*hdr)) eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)]; hdr = wpabuf_head(eap); switch (hdr->code) { case EAP_CODE_REQUEST: if (eap_type >= 0) sm->eap_type_authsrv = eap_type; os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)", eap_type >= 0 ? eap_server_get_name(0, eap_type) : "??", eap_type); break; case EAP_CODE_RESPONSE: os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)", eap_type >= 0 ? eap_server_get_name(0, eap_type) : "??", eap_type); break; case EAP_CODE_SUCCESS: os_strlcpy(buf, "EAP Success", sizeof(buf)); break; case EAP_CODE_FAILURE: os_strlcpy(buf, "EAP Failure", sizeof(buf)); break; default: os_strlcpy(buf, "unknown EAP code", sizeof(buf)); break; } buf[sizeof(buf) - 1] = '\0'; hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d " "id=%d len=%d) from RADIUS server: %s", hdr->code, hdr->identifier, be_to_host16(hdr->length), buf); sm->eap_if->aaaEapReq = TRUE; wpabuf_free(sm->eap_if->aaaEapReqData); sm->eap_if->aaaEapReqData = eap; } static void ieee802_1x_get_keys(struct hostapd_data *hapd, struct sta_info *sta, struct radius_msg *msg, struct radius_msg *req, const u8 *shared_secret, size_t shared_secret_len) { struct radius_ms_mppe_keys *keys; struct eapol_state_machine *sm = sta->eapol_sm; if (sm == NULL) return; keys = radius_msg_get_ms_keys(msg, req, shared_secret, shared_secret_len); if (keys && keys->send && keys->recv) { size_t len = keys->send_len + keys->recv_len; wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key", keys->send, keys->send_len); wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key", keys->recv, keys->recv_len); os_free(sm->eap_if->aaaEapKeyData); sm->eap_if->aaaEapKeyData = os_malloc(len); if (sm->eap_if->aaaEapKeyData) { os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv, keys->recv_len); os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len, keys->send, keys->send_len); sm->eap_if->aaaEapKeyDataLen = len; sm->eap_if->aaaEapKeyAvailable = TRUE; } } if (keys) { os_free(keys->send); os_free(keys->recv); os_free(keys); } } static void ieee802_1x_store_radius_class(struct hostapd_data *hapd, struct sta_info *sta, struct radius_msg *msg) { u8 *class; size_t class_len; struct eapol_state_machine *sm = sta->eapol_sm; int count, i; struct radius_attr_data *nclass; size_t nclass_count; if (!hapd->conf->radius->acct_server || hapd->radius == NULL || sm == NULL) return; radius_free_class(&sm->radius_class); count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1); if (count <= 0) return; nclass = os_calloc(count, sizeof(struct radius_attr_data)); if (nclass == NULL) return; nclass_count = 0; class = NULL; for (i = 0; i < count; i++) { do { if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS, &class, &class_len, class) < 0) { i = count; break; } } while (class_len < 1); nclass[nclass_count].data = os_malloc(class_len); if (nclass[nclass_count].data == NULL) break; os_memcpy(nclass[nclass_count].data, class, class_len); nclass[nclass_count].len = class_len; nclass_count++; } sm->radius_class.attr = nclass; sm->radius_class.count = nclass_count; wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class " "attributes for " MACSTR, (unsigned long) sm->radius_class.count, MAC2STR(sta->addr)); } /* Update sta->identity based on User-Name attribute in Access-Accept */ static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd, struct sta_info *sta, struct radius_msg *msg) { u8 *buf, *identity; size_t len; struct eapol_state_machine *sm = sta->eapol_sm; if (sm == NULL) return; if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len, NULL) < 0) return; identity = (u8 *) dup_binstr(buf, len); if (identity == NULL) return; hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with " "User-Name from Access-Accept '%s'", sm->identity ? (char *) sm->identity : "N/A", (char *) identity); os_free(sm->identity); sm->identity = identity; sm->identity_len = len; } /* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */ static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd, struct sta_info *sta, struct radius_msg *msg) { struct eapol_state_machine *sm = sta->eapol_sm; struct wpabuf *cui; u8 *buf; size_t len; if (sm == NULL) return; if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY, &buf, &len, NULL) < 0) return; cui = wpabuf_alloc_copy(buf, len); if (cui == NULL) return; wpabuf_free(sm->radius_cui); sm->radius_cui = cui; } #ifdef CONFIG_HS20 static void ieee802_1x_hs20_sub_rem(struct sta_info *sta, u8 *pos, size_t len) { sta->remediation = 1; os_free(sta->remediation_url); if (len > 2) { sta->remediation_url = os_malloc(len); if (!sta->remediation_url) return; sta->remediation_method = pos[0]; os_memcpy(sta->remediation_url, pos + 1, len - 1); sta->remediation_url[len - 1] = '\0'; wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed " "for " MACSTR " - server method %u URL %s", MAC2STR(sta->addr), sta->remediation_method, sta->remediation_url); } else { sta->remediation_url = NULL; wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed " "for " MACSTR, MAC2STR(sta->addr)); } /* TODO: assign the STA into remediation VLAN or add filtering */ } static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd, struct sta_info *sta, u8 *pos, size_t len) { if (len < 3) return; /* Malformed information */ sta->hs20_deauth_requested = 1; wpa_printf(MSG_DEBUG, "HS 2.0: Deauthentication request - Code %u " "Re-auth Delay %u", *pos, WPA_GET_LE16(pos + 1)); wpabuf_free(sta->hs20_deauth_req); sta->hs20_deauth_req = wpabuf_alloc(len + 1); if (sta->hs20_deauth_req) { wpabuf_put_data(sta->hs20_deauth_req, pos, 3); wpabuf_put_u8(sta->hs20_deauth_req, len - 3); wpabuf_put_data(sta->hs20_deauth_req, pos + 3, len - 3); } ap_sta_session_timeout(hapd, sta, hapd->conf->hs20_deauth_req_timeout); } static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd, struct sta_info *sta, u8 *pos, size_t len, int session_timeout) { unsigned int swt; int warning_time, beacon_int; if (len < 1) return; /* Malformed information */ os_free(sta->hs20_session_info_url); sta->hs20_session_info_url = os_malloc(len); if (sta->hs20_session_info_url == NULL) return; swt = pos[0]; os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1); sta->hs20_session_info_url[len - 1] = '\0'; wpa_printf(MSG_DEBUG, "HS 2.0: Session Information URL='%s' SWT=%u " "(session_timeout=%d)", sta->hs20_session_info_url, swt, session_timeout); if (session_timeout < 0) { wpa_printf(MSG_DEBUG, "HS 2.0: No Session-Timeout set - ignore session info URL"); return; } if (swt == 255) swt = 1; /* Use one minute as the AP selected value */ if ((unsigned int) session_timeout < swt * 60) warning_time = 0; else warning_time = session_timeout - swt * 60; beacon_int = hapd->iconf->beacon_int; if (beacon_int < 1) beacon_int = 100; /* best guess */ sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128; if (sta->hs20_disassoc_timer > 65535) sta->hs20_disassoc_timer = 65535; ap_sta_session_warning_timeout(hapd, sta, warning_time); } #endif /* CONFIG_HS20 */ static void ieee802_1x_check_hs20(struct hostapd_data *hapd, struct sta_info *sta, struct radius_msg *msg, int session_timeout) { #ifdef CONFIG_HS20 u8 *buf, *pos, *end, type, sublen; size_t len; buf = NULL; sta->remediation = 0; sta->hs20_deauth_requested = 0; for (;;) { if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC, &buf, &len, buf) < 0) break; if (len < 6) continue; pos = buf; end = buf + len; if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA) continue; pos += 4; type = *pos++; sublen = *pos++; if (sublen < 2) continue; /* invalid length */ sublen -= 2; /* skip header */ if (pos + sublen > end) continue; /* invalid WFA VSA */ switch (type) { case RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION: ieee802_1x_hs20_sub_rem(sta, pos, sublen); break; case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ: ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen); break; case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL: ieee802_1x_hs20_session_info(hapd, sta, pos, sublen, session_timeout); break; } } #endif /* CONFIG_HS20 */ } struct sta_id_search { u8 identifier; struct eapol_state_machine *sm; }; static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd, struct sta_info *sta, void *ctx) { struct sta_id_search *id_search = ctx; struct eapol_state_machine *sm = sta->eapol_sm; if (sm && sm->radius_identifier >= 0 && sm->radius_identifier == id_search->identifier) { id_search->sm = sm; return 1; } return 0; } static struct eapol_state_machine * ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier) { struct sta_id_search id_search; id_search.identifier = identifier; id_search.sm = NULL; ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search); return id_search.sm; } /** * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server * @msg: RADIUS response message * @req: RADIUS request message * @shared_secret: RADIUS shared secret * @shared_secret_len: Length of shared_secret in octets * @data: Context data (struct hostapd_data *) * Returns: Processing status */ static RadiusRxResult ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req, const u8 *shared_secret, size_t shared_secret_len, void *data) { struct hostapd_data *hapd = data; struct sta_info *sta; u32 session_timeout = 0, termination_action, acct_interim_interval; int session_timeout_set, old_vlanid = 0; struct eapol_state_machine *sm; int override_eapReq = 0; struct radius_hdr *hdr = radius_msg_get_hdr(msg); sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier); if (sm == NULL) { wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching " "station for this RADIUS message"); return RADIUS_RX_UNKNOWN; } sta = sm->sta; /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be * present when packet contains an EAP-Message attribute */ if (hdr->code == RADIUS_CODE_ACCESS_REJECT && radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL, 0) < 0 && radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) { wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without " "Message-Authenticator since it does not include " "EAP-Message"); } else if (radius_msg_verify(msg, shared_secret, shared_secret_len, req, 1)) { wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have correct Message-Authenticator - dropped"); return RADIUS_RX_INVALID_AUTHENTICATOR; } if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT && hdr->code != RADIUS_CODE_ACCESS_REJECT && hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) { wpa_printf(MSG_INFO, "Unknown RADIUS message code"); return RADIUS_RX_UNKNOWN; } sm->radius_identifier = -1; wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR, MAC2STR(sta->addr)); radius_msg_free(sm->last_recv_radius); sm->last_recv_radius = msg; session_timeout_set = !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT, &session_timeout); if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION, &termination_action)) termination_action = RADIUS_TERMINATION_ACTION_DEFAULT; if (hapd->conf->acct_interim_interval == 0 && hdr->code == RADIUS_CODE_ACCESS_ACCEPT && radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL, &acct_interim_interval) == 0) { if (acct_interim_interval < 60) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_INFO, "ignored too small " "Acct-Interim-Interval %d", acct_interim_interval); } else sta->acct_interim_interval = acct_interim_interval; } switch (hdr->code) { case RADIUS_CODE_ACCESS_ACCEPT: if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED) sta->vlan_id = 0; #ifndef CONFIG_NO_VLAN else { old_vlanid = sta->vlan_id; sta->vlan_id = radius_msg_get_vlanid(msg); } if (sta->vlan_id > 0 && hostapd_vlan_id_valid(hapd->conf->vlan, sta->vlan_id)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id); } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) { sta->eapol_sm->authFail = TRUE; hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_INFO, "authentication " "server did not include required VLAN " "ID in Access-Accept"); break; } #endif /* CONFIG_NO_VLAN */ if (ap_sta_bind_vlan(hapd, sta, old_vlanid) < 0) break; sta->session_timeout_set = !!session_timeout_set; sta->session_timeout = session_timeout; /* RFC 3580, Ch. 3.17 */ if (session_timeout_set && termination_action == RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) { sm->reAuthPeriod = session_timeout; } else if (session_timeout_set) ap_sta_session_timeout(hapd, sta, session_timeout); sm->eap_if->aaaSuccess = TRUE; override_eapReq = 1; ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret, shared_secret_len); ieee802_1x_store_radius_class(hapd, sta, msg); ieee802_1x_update_sta_identity(hapd, sta, msg); ieee802_1x_update_sta_cui(hapd, sta, msg); ieee802_1x_check_hs20(hapd, sta, msg, session_timeout_set ? (int) session_timeout : -1); if (sm->eap_if->eapKeyAvailable && !sta->remediation && !sta->hs20_deauth_requested && wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt, session_timeout_set ? (int) session_timeout : -1, sm) == 0) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, HOSTAPD_LEVEL_DEBUG, "Added PMKSA cache entry"); } break; case RADIUS_CODE_ACCESS_REJECT: sm->eap_if->aaaFail = TRUE; override_eapReq = 1; break; case RADIUS_CODE_ACCESS_CHALLENGE: sm->eap_if->aaaEapReq = TRUE; if (session_timeout_set) { /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */ sm->eap_if->aaaMethodTimeout = session_timeout; hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "using EAP timeout of %d seconds (from " "RADIUS)", sm->eap_if->aaaMethodTimeout); } else { /* * Use dynamic retransmission behavior per EAP * specification. */ sm->eap_if->aaaMethodTimeout = 0; } break; } ieee802_1x_decapsulate_radius(hapd, sta); if (override_eapReq) sm->eap_if->aaaEapReq = FALSE; eapol_auth_step(sm); return RADIUS_RX_QUEUED; } #endif /* CONFIG_NO_RADIUS */ void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta) { struct eapol_state_machine *sm = sta->eapol_sm; if (sm == NULL) return; hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "aborting authentication"); #ifndef CONFIG_NO_RADIUS radius_msg_free(sm->last_recv_radius); sm->last_recv_radius = NULL; #endif /* CONFIG_NO_RADIUS */ if (sm->eap_if->eapTimeout) { /* * Disconnect the STA since it did not reply to the last EAP * request and we cannot continue EAP processing (EAP-Failure * could only be sent if the EAP peer actually replied). */ wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR, MAC2STR(sta->addr)); sm->eap_if->portEnabled = FALSE; ap_sta_disconnect(hapd, sta, sta->addr, WLAN_REASON_PREV_AUTH_NOT_VALID); } } static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd) { struct eapol_authenticator *eapol = hapd->eapol_auth; if (hapd->conf->default_wep_key_len < 1) return 0; os_free(eapol->default_wep_key); eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len); if (eapol->default_wep_key == NULL || random_get_bytes(eapol->default_wep_key, hapd->conf->default_wep_key_len)) { wpa_printf(MSG_INFO, "Could not generate random WEP key"); os_free(eapol->default_wep_key); eapol->default_wep_key = NULL; return -1; } wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key", eapol->default_wep_key, hapd->conf->default_wep_key_len); return 0; } static int ieee802_1x_sta_key_available(struct hostapd_data *hapd, struct sta_info *sta, void *ctx) { if (sta->eapol_sm) { sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; eapol_auth_step(sta->eapol_sm); } return 0; } static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx) { struct hostapd_data *hapd = eloop_ctx; struct eapol_authenticator *eapol = hapd->eapol_auth; if (eapol->default_wep_key_idx >= 3) eapol->default_wep_key_idx = hapd->conf->individual_wep_key_len > 0 ? 1 : 0; else eapol->default_wep_key_idx++; wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d", eapol->default_wep_key_idx); if (ieee802_1x_rekey_broadcast(hapd)) { hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_WARNING, "failed to generate a " "new broadcast key"); os_free(eapol->default_wep_key); eapol->default_wep_key = NULL; return; } /* TODO: Could setup key for RX here, but change default TX keyid only * after new broadcast key has been sent to all stations. */ if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP, broadcast_ether_addr, eapol->default_wep_key_idx, 1, NULL, 0, eapol->default_wep_key, hapd->conf->default_wep_key_len)) { hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_WARNING, "failed to configure a " "new broadcast key"); os_free(eapol->default_wep_key); eapol->default_wep_key = NULL; return; } ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL); if (hapd->conf->wep_rekeying_period > 0) { eloop_register_timeout(hapd->conf->wep_rekeying_period, 0, ieee802_1x_rekey, hapd, NULL); } } static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type, const u8 *data, size_t datalen) { #ifdef CONFIG_WPS struct sta_info *sta = sta_ctx; if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) == WLAN_STA_MAYBE_WPS) { const u8 *identity; size_t identity_len; struct eapol_state_machine *sm = sta->eapol_sm; identity = eap_get_identity(sm->eap, &identity_len); if (identity && ((identity_len == WSC_ID_ENROLLEE_LEN && os_memcmp(identity, WSC_ID_ENROLLEE, WSC_ID_ENROLLEE_LEN) == 0) || (identity_len == WSC_ID_REGISTRAR_LEN && os_memcmp(identity, WSC_ID_REGISTRAR, WSC_ID_REGISTRAR_LEN) == 0))) { wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> " "WLAN_STA_WPS"); sta->flags |= WLAN_STA_WPS; } } #endif /* CONFIG_WPS */ ieee802_1x_send(ctx, sta_ctx, type, data, datalen); } static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx, const u8 *data, size_t datalen) { #ifndef CONFIG_NO_RADIUS struct hostapd_data *hapd = ctx; struct sta_info *sta = sta_ctx; ieee802_1x_encapsulate_radius(hapd, sta, data, datalen); #endif /* CONFIG_NO_RADIUS */ } static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success, int preauth, int remediation) { struct hostapd_data *hapd = ctx; struct sta_info *sta = sta_ctx; if (preauth) rsn_preauth_finished(hapd, sta, success); else ieee802_1x_finished(hapd, sta, success, remediation); } static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity, size_t identity_len, int phase2, struct eap_user *user) { struct hostapd_data *hapd = ctx; const struct hostapd_eap_user *eap_user; int i; eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2); if (eap_user == NULL) return -1; os_memset(user, 0, sizeof(*user)); user->phase2 = phase2; for (i = 0; i < EAP_MAX_METHODS; i++) { user->methods[i].vendor = eap_user->methods[i].vendor; user->methods[i].method = eap_user->methods[i].method; } if (eap_user->password) { user->password = os_malloc(eap_user->password_len); if (user->password == NULL) return -1; os_memcpy(user->password, eap_user->password, eap_user->password_len); user->password_len = eap_user->password_len; user->password_hash = eap_user->password_hash; } user->force_version = eap_user->force_version; user->macacl = eap_user->macacl; user->ttls_auth = eap_user->ttls_auth; user->remediation = eap_user->remediation; return 0; } static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr) { struct hostapd_data *hapd = ctx; struct sta_info *sta; sta = ap_get_sta(hapd, addr); if (sta == NULL || sta->eapol_sm == NULL) return 0; return 1; } static void ieee802_1x_logger(void *ctx, const u8 *addr, eapol_logger_level level, const char *txt) { #ifndef CONFIG_NO_HOSTAPD_LOGGER struct hostapd_data *hapd = ctx; int hlevel; switch (level) { case EAPOL_LOGGER_WARNING: hlevel = HOSTAPD_LEVEL_WARNING; break; case EAPOL_LOGGER_INFO: hlevel = HOSTAPD_LEVEL_INFO; break; case EAPOL_LOGGER_DEBUG: default: hlevel = HOSTAPD_LEVEL_DEBUG; break; } hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s", txt); #endif /* CONFIG_NO_HOSTAPD_LOGGER */ } static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx, int authorized) { struct hostapd_data *hapd = ctx; struct sta_info *sta = sta_ctx; ieee802_1x_set_sta_authorized(hapd, sta, authorized); } static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx) { struct hostapd_data *hapd = ctx; struct sta_info *sta = sta_ctx; ieee802_1x_abort_auth(hapd, sta); } static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx) { struct hostapd_data *hapd = ctx; struct sta_info *sta = sta_ctx; ieee802_1x_tx_key(hapd, sta); } static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx, enum eapol_event type) { /* struct hostapd_data *hapd = ctx; */ struct sta_info *sta = sta_ctx; switch (type) { case EAPOL_AUTH_SM_CHANGE: wpa_auth_sm_notify(sta->wpa_sm); break; case EAPOL_AUTH_REAUTHENTICATE: wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL); break; } } #ifdef CONFIG_ERP static struct eap_server_erp_key * ieee802_1x_erp_get_key(void *ctx, const char *keyname) { struct hostapd_data *hapd = ctx; struct eap_server_erp_key *erp; dl_list_for_each(erp, &hapd->erp_keys, struct eap_server_erp_key, list) { if (os_strcmp(erp->keyname_nai, keyname) == 0) return erp; } return NULL; } static int ieee802_1x_erp_add_key(void *ctx, struct eap_server_erp_key *erp) { struct hostapd_data *hapd = ctx; dl_list_add(&hapd->erp_keys, &erp->list); return 0; } #endif /* CONFIG_ERP */ int ieee802_1x_init(struct hostapd_data *hapd) { int i; struct eapol_auth_config conf; struct eapol_auth_cb cb; dl_list_init(&hapd->erp_keys); os_memset(&conf, 0, sizeof(conf)); conf.ctx = hapd; conf.eap_reauth_period = hapd->conf->eap_reauth_period; conf.wpa = hapd->conf->wpa; conf.individual_wep_key_len = hapd->conf->individual_wep_key_len; conf.eap_server = hapd->conf->eap_server; conf.ssl_ctx = hapd->ssl_ctx; conf.msg_ctx = hapd->msg_ctx; conf.eap_sim_db_priv = hapd->eap_sim_db_priv; conf.eap_req_id_text = hapd->conf->eap_req_id_text; conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len; conf.erp_send_reauth_start = hapd->conf->erp_send_reauth_start; conf.erp_domain = hapd->conf->erp_domain; conf.erp = hapd->conf->eap_server_erp; conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key; conf.eap_fast_a_id = hapd->conf->eap_fast_a_id; conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len; conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info; conf.eap_fast_prov = hapd->conf->eap_fast_prov; conf.pac_key_lifetime = hapd->conf->pac_key_lifetime; conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time; conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind; conf.tnc = hapd->conf->tnc; conf.wps = hapd->wps; conf.fragment_size = hapd->conf->fragment_size; conf.pwd_group = hapd->conf->pwd_group; conf.pbc_in_m1 = hapd->conf->pbc_in_m1; if (hapd->conf->server_id) { conf.server_id = (const u8 *) hapd->conf->server_id; conf.server_id_len = os_strlen(hapd->conf->server_id); } else { conf.server_id = (const u8 *) "hostapd"; conf.server_id_len = 7; } os_memset(&cb, 0, sizeof(cb)); cb.eapol_send = ieee802_1x_eapol_send; cb.aaa_send = ieee802_1x_aaa_send; cb.finished = _ieee802_1x_finished; cb.get_eap_user = ieee802_1x_get_eap_user; cb.sta_entry_alive = ieee802_1x_sta_entry_alive; cb.logger = ieee802_1x_logger; cb.set_port_authorized = ieee802_1x_set_port_authorized; cb.abort_auth = _ieee802_1x_abort_auth; cb.tx_key = _ieee802_1x_tx_key; cb.eapol_event = ieee802_1x_eapol_event; #ifdef CONFIG_ERP cb.erp_get_key = ieee802_1x_erp_get_key; cb.erp_add_key = ieee802_1x_erp_add_key; #endif /* CONFIG_ERP */ hapd->eapol_auth = eapol_auth_init(&conf, &cb); if (hapd->eapol_auth == NULL) return -1; if ((hapd->conf->ieee802_1x || hapd->conf->wpa) && hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1)) return -1; #ifndef CONFIG_NO_RADIUS if (radius_client_register(hapd->radius, RADIUS_AUTH, ieee802_1x_receive_auth, hapd)) return -1; #endif /* CONFIG_NO_RADIUS */ if (hapd->conf->default_wep_key_len) { for (i = 0; i < 4; i++) hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_NONE, NULL, i, 0, NULL, 0, NULL, 0); ieee802_1x_rekey(hapd, NULL); if (hapd->eapol_auth->default_wep_key == NULL) return -1; } return 0; } void ieee802_1x_erp_flush(struct hostapd_data *hapd) { struct eap_server_erp_key *erp; while ((erp = dl_list_first(&hapd->erp_keys, struct eap_server_erp_key, list)) != NULL) { dl_list_del(&erp->list); bin_clear_free(erp, sizeof(*erp)); } } void ieee802_1x_deinit(struct hostapd_data *hapd) { eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL); if (hapd->driver != NULL && (hapd->conf->ieee802_1x || hapd->conf->wpa)) hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0); eapol_auth_deinit(hapd->eapol_auth); hapd->eapol_auth = NULL; ieee802_1x_erp_flush(hapd); } int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta, const u8 *buf, size_t len, int ack) { struct ieee80211_hdr *hdr; u8 *pos; const unsigned char rfc1042_hdr[ETH_ALEN] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; if (sta == NULL) return -1; if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2) return 0; hdr = (struct ieee80211_hdr *) buf; pos = (u8 *) (hdr + 1); if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0) return 0; pos += sizeof(rfc1042_hdr); if (WPA_GET_BE16(pos) != ETH_P_PAE) return 0; pos += 2; return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos, ack); } int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta, const u8 *buf, int len, int ack) { const struct ieee802_1x_hdr *xhdr = (const struct ieee802_1x_hdr *) buf; const u8 *pos = buf + sizeof(*xhdr); struct ieee802_1x_eapol_key *key; if (len < (int) sizeof(*xhdr)) return 0; wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d " "type=%d length=%d - ack=%d", MAC2STR(sta->addr), xhdr->version, xhdr->type, be_to_host16(xhdr->length), ack); if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY) return 0; if (pos + sizeof(struct wpa_eapol_key) <= buf + len) { const struct wpa_eapol_key *wpa; wpa = (const struct wpa_eapol_key *) pos; if (wpa->type == EAPOL_KEY_TYPE_RSN || wpa->type == EAPOL_KEY_TYPE_WPA) wpa_auth_eapol_key_tx_status(hapd->wpa_auth, sta->wpa_sm, ack); } /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant * or Authenticator state machines, but EAPOL-Key packets are not * retransmitted in case of failure. Try to re-send failed EAPOL-Key * packets couple of times because otherwise STA keys become * unsynchronized with AP. */ if (!ack && pos + sizeof(*key) <= buf + len) { key = (struct ieee802_1x_eapol_key *) pos; hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key " "frame (%scast index=%d)", key->key_index & BIT(7) ? "uni" : "broad", key->key_index & ~BIT(7)); /* TODO: re-send EAPOL-Key couple of times (with short delay * between them?). If all attempt fail, report error and * deauthenticate STA so that it will get new keys when * authenticating again (e.g., after returning in range). * Separate limit/transmit state needed both for unicast and * broadcast keys(?) */ } /* TODO: could move unicast key configuration from ieee802_1x_tx_key() * to here and change the key only if the EAPOL-Key packet was Acked. */ return 1; } u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len) { if (sm == NULL || sm->identity == NULL) return NULL; *len = sm->identity_len; return sm->identity; } u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len, int idx) { if (sm == NULL || sm->radius_class.attr == NULL || idx >= (int) sm->radius_class.count) return NULL; *len = sm->radius_class.attr[idx].len; return sm->radius_class.attr[idx].data; } struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm) { if (sm == NULL) return NULL; return sm->radius_cui; } const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len) { *len = 0; if (sm == NULL) return NULL; *len = sm->eap_if->eapKeyDataLen; return sm->eap_if->eapKeyData; } void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm, int enabled) { if (sm == NULL) return; sm->eap_if->portEnabled = enabled ? TRUE : FALSE; eapol_auth_step(sm); } void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm, int valid) { if (sm == NULL) return; sm->portValid = valid ? TRUE : FALSE; eapol_auth_step(sm); } void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth) { if (sm == NULL) return; if (pre_auth) sm->flags |= EAPOL_SM_PREAUTH; else sm->flags &= ~EAPOL_SM_PREAUTH; } static const char * bool_txt(Boolean bool) { return bool ? "TRUE" : "FALSE"; } int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen) { /* TODO */ return 0; } int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta, char *buf, size_t buflen) { int len = 0, ret; struct eapol_state_machine *sm = sta->eapol_sm; struct os_reltime diff; const char *name1; const char *name2; if (sm == NULL) return 0; ret = os_snprintf(buf + len, buflen - len, "dot1xPaePortNumber=%d\n" "dot1xPaePortProtocolVersion=%d\n" "dot1xPaePortCapabilities=1\n" "dot1xPaePortInitialize=%d\n" "dot1xPaePortReauthenticate=FALSE\n", sta->aid, EAPOL_VERSION, sm->initialize); if (os_snprintf_error(buflen - len, ret)) return len; len += ret; /* dot1xAuthConfigTable */ ret = os_snprintf(buf + len, buflen - len, "dot1xAuthPaeState=%d\n" "dot1xAuthBackendAuthState=%d\n" "dot1xAuthAdminControlledDirections=%d\n" "dot1xAuthOperControlledDirections=%d\n" "dot1xAuthAuthControlledPortStatus=%d\n" "dot1xAuthAuthControlledPortControl=%d\n" "dot1xAuthQuietPeriod=%u\n" "dot1xAuthServerTimeout=%u\n" "dot1xAuthReAuthPeriod=%u\n" "dot1xAuthReAuthEnabled=%s\n" "dot1xAuthKeyTxEnabled=%s\n", sm->auth_pae_state + 1, sm->be_auth_state + 1, sm->adminControlledDirections, sm->operControlledDirections, sm->authPortStatus, sm->portControl, sm->quietPeriod, sm->serverTimeout, sm->reAuthPeriod, bool_txt(sm->reAuthEnabled), bool_txt(sm->keyTxEnabled)); if (os_snprintf_error(buflen - len, ret)) return len; len += ret; /* dot1xAuthStatsTable */ ret = os_snprintf(buf + len, buflen - len, "dot1xAuthEapolFramesRx=%u\n" "dot1xAuthEapolFramesTx=%u\n" "dot1xAuthEapolStartFramesRx=%u\n" "dot1xAuthEapolLogoffFramesRx=%u\n" "dot1xAuthEapolRespIdFramesRx=%u\n" "dot1xAuthEapolRespFramesRx=%u\n" "dot1xAuthEapolReqIdFramesTx=%u\n" "dot1xAuthEapolReqFramesTx=%u\n" "dot1xAuthInvalidEapolFramesRx=%u\n" "dot1xAuthEapLengthErrorFramesRx=%u\n" "dot1xAuthLastEapolFrameVersion=%u\n" "dot1xAuthLastEapolFrameSource=" MACSTR "\n", sm->dot1xAuthEapolFramesRx, sm->dot1xAuthEapolFramesTx, sm->dot1xAuthEapolStartFramesRx, sm->dot1xAuthEapolLogoffFramesRx, sm->dot1xAuthEapolRespIdFramesRx, sm->dot1xAuthEapolRespFramesRx, sm->dot1xAuthEapolReqIdFramesTx, sm->dot1xAuthEapolReqFramesTx, sm->dot1xAuthInvalidEapolFramesRx, sm->dot1xAuthEapLengthErrorFramesRx, sm->dot1xAuthLastEapolFrameVersion, MAC2STR(sm->addr)); if (os_snprintf_error(buflen - len, ret)) return len; len += ret; /* dot1xAuthDiagTable */ ret = os_snprintf(buf + len, buflen - len, "dot1xAuthEntersConnecting=%u\n" "dot1xAuthEapLogoffsWhileConnecting=%u\n" "dot1xAuthEntersAuthenticating=%u\n" "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n" "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n" "dot1xAuthAuthFailWhileAuthenticating=%u\n" "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n" "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n" "dot1xAuthAuthReauthsWhileAuthenticated=%u\n" "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n" "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n" "dot1xAuthBackendResponses=%u\n" "dot1xAuthBackendAccessChallenges=%u\n" "dot1xAuthBackendOtherRequestsToSupplicant=%u\n" "dot1xAuthBackendAuthSuccesses=%u\n" "dot1xAuthBackendAuthFails=%u\n", sm->authEntersConnecting, sm->authEapLogoffsWhileConnecting, sm->authEntersAuthenticating, sm->authAuthSuccessesWhileAuthenticating, sm->authAuthTimeoutsWhileAuthenticating, sm->authAuthFailWhileAuthenticating, sm->authAuthEapStartsWhileAuthenticating, sm->authAuthEapLogoffWhileAuthenticating, sm->authAuthReauthsWhileAuthenticated, sm->authAuthEapStartsWhileAuthenticated, sm->authAuthEapLogoffWhileAuthenticated, sm->backendResponses, sm->backendAccessChallenges, sm->backendOtherRequestsToSupplicant, sm->backendAuthSuccesses, sm->backendAuthFails); if (os_snprintf_error(buflen - len, ret)) return len; len += ret; /* dot1xAuthSessionStatsTable */ os_reltime_age(&sta->acct_session_start, &diff); ret = os_snprintf(buf + len, buflen - len, /* TODO: dot1xAuthSessionOctetsRx */ /* TODO: dot1xAuthSessionOctetsTx */ /* TODO: dot1xAuthSessionFramesRx */ /* TODO: dot1xAuthSessionFramesTx */ "dot1xAuthSessionId=%08X-%08X\n" "dot1xAuthSessionAuthenticMethod=%d\n" "dot1xAuthSessionTime=%u\n" "dot1xAuthSessionTerminateCause=999\n" "dot1xAuthSessionUserName=%s\n", sta->acct_session_id_hi, sta->acct_session_id_lo, (wpa_key_mgmt_wpa_ieee8021x( wpa_auth_sta_key_mgmt(sta->wpa_sm))) ? 1 : 2, (unsigned int) diff.sec, sm->identity); if (os_snprintf_error(buflen - len, ret)) return len; len += ret; if (sm->acct_multi_session_id_hi) { ret = os_snprintf(buf + len, buflen - len, "authMultiSessionId=%08X+%08X\n", sm->acct_multi_session_id_hi, sm->acct_multi_session_id_lo); if (os_snprintf_error(buflen - len, ret)) return len; len += ret; } name1 = eap_server_get_name(0, sm->eap_type_authsrv); name2 = eap_server_get_name(0, sm->eap_type_supp); ret = os_snprintf(buf + len, buflen - len, "last_eap_type_as=%d (%s)\n" "last_eap_type_sta=%d (%s)\n", sm->eap_type_authsrv, name1 ? name1 : "", sm->eap_type_supp, name2 ? name2 : ""); if (os_snprintf_error(buflen - len, ret)) return len; len += ret; return len; } static void ieee802_1x_finished(struct hostapd_data *hapd, struct sta_info *sta, int success, int remediation) { const u8 *key; size_t len; /* TODO: get PMKLifetime from WPA parameters */ static const int dot11RSNAConfigPMKLifetime = 43200; unsigned int session_timeout; #ifdef CONFIG_HS20 if (remediation && !sta->remediation) { sta->remediation = 1; os_free(sta->remediation_url); sta->remediation_url = os_strdup(hapd->conf->subscr_remediation_url); sta->remediation_method = 1; /* SOAP-XML SPP */ } if (success) { if (sta->remediation) { wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification " "to " MACSTR " to indicate Subscription " "Remediation", MAC2STR(sta->addr)); hs20_send_wnm_notification(hapd, sta->addr, sta->remediation_method, sta->remediation_url); os_free(sta->remediation_url); sta->remediation_url = NULL; } if (sta->hs20_deauth_req) { wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification " "to " MACSTR " to indicate imminent " "deauthentication", MAC2STR(sta->addr)); hs20_send_wnm_notification_deauth_req( hapd, sta->addr, sta->hs20_deauth_req); } } #endif /* CONFIG_HS20 */ key = ieee802_1x_get_key(sta->eapol_sm, &len); if (sta->session_timeout_set) session_timeout = sta->session_timeout; else session_timeout = dot11RSNAConfigPMKLifetime; if (success && key && len >= PMK_LEN && !sta->remediation && !sta->hs20_deauth_requested && wpa_auth_pmksa_add(sta->wpa_sm, key, session_timeout, sta->eapol_sm) == 0) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, HOSTAPD_LEVEL_DEBUG, "Added PMKSA cache entry (IEEE 802.1X)"); } if (!success) { /* * Many devices require deauthentication after WPS provisioning * and some may not be be able to do that themselves, so * disconnect the client here. In addition, this may also * benefit IEEE 802.1X/EAPOL authentication cases, too since * the EAPOL PAE state machine would remain in HELD state for * considerable amount of time and some EAP methods, like * EAP-FAST with anonymous provisioning, may require another * EAPOL authentication to be started to complete connection. */ wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "IEEE 802.1X: Force " "disconnection after EAP-Failure"); /* Add a small sleep to increase likelihood of previously * requested EAP-Failure TX getting out before this should the * driver reorder operations. */ os_sleep(0, 10000); ap_sta_disconnect(hapd, sta, sta->addr, WLAN_REASON_IEEE_802_1X_AUTH_FAILED); hostapd_wps_eap_completed(hapd); } }