/* * Interworking (IEEE 802.11u) * Copyright (c) 2011-2013, Qualcomm Atheros, Inc. * Copyright (c) 2011-2014, Jouni Malinen * * This software may be distributed under the terms of the BSD license. * See README for more details. */ #include "includes.h" #include "common.h" #include "common/ieee802_11_defs.h" #include "common/gas.h" #include "common/wpa_ctrl.h" #include "utils/pcsc_funcs.h" #include "utils/eloop.h" #include "drivers/driver.h" #include "eap_common/eap_defs.h" #include "eap_peer/eap.h" #include "eap_peer/eap_methods.h" #include "eapol_supp/eapol_supp_sm.h" #include "rsn_supp/wpa.h" #include "wpa_supplicant_i.h" #include "config.h" #include "config_ssid.h" #include "bss.h" #include "scan.h" #include "notify.h" #include "gas_query.h" #include "hs20_supplicant.h" #include "interworking.h" #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC) #define INTERWORKING_3GPP #else #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC) #define INTERWORKING_3GPP #else #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC) #define INTERWORKING_3GPP #endif #endif #endif static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s); static struct wpa_cred * interworking_credentials_available_realm( struct wpa_supplicant *wpa_s, struct wpa_bss *bss); static struct wpa_cred * interworking_credentials_available_3gpp( struct wpa_supplicant *wpa_s, struct wpa_bss *bss); static void interworking_reconnect(struct wpa_supplicant *wpa_s) { if (wpa_s->wpa_state >= WPA_AUTHENTICATING) { wpa_supplicant_cancel_sched_scan(wpa_s); wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_DEAUTH_LEAVING); } wpa_s->disconnected = 0; wpa_s->reassociate = 1; if (wpa_supplicant_fast_associate(wpa_s) >= 0) return; wpa_supplicant_req_scan(wpa_s, 0, 0); } static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids, struct wpabuf *extra) { struct wpabuf *buf; size_t i; u8 *len_pos; buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 + (extra ? wpabuf_len(extra) : 0)); if (buf == NULL) return NULL; len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST); for (i = 0; i < num_ids; i++) wpabuf_put_le16(buf, info_ids[i]); gas_anqp_set_element_len(buf, len_pos); if (extra) wpabuf_put_buf(buf, extra); gas_anqp_set_len(buf); return buf; } static void interworking_anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token, enum gas_query_result result, const struct wpabuf *adv_proto, const struct wpabuf *resp, u16 status_code) { struct wpa_supplicant *wpa_s = ctx; anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp, status_code); interworking_next_anqp_fetch(wpa_s); } static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s) { struct wpa_cred *cred; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->roaming_consortium_len) return 1; if (cred->required_roaming_consortium_len) return 1; } return 0; } static int cred_with_3gpp(struct wpa_supplicant *wpa_s) { struct wpa_cred *cred; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->pcsc || cred->imsi) return 1; } return 0; } static int cred_with_nai_realm(struct wpa_supplicant *wpa_s) { struct wpa_cred *cred; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->pcsc || cred->imsi) continue; if (!cred->eap_method) return 1; if (cred->realm && cred->roaming_consortium_len == 0) return 1; } return 0; } static int cred_with_domain(struct wpa_supplicant *wpa_s) { struct wpa_cred *cred; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->domain || cred->pcsc || cred->imsi) return 1; } return 0; } static int additional_roaming_consortiums(struct wpa_bss *bss) { const u8 *ie; ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM); if (ie == NULL || ie[1] == 0) return 0; return ie[2]; /* Number of ANQP OIs */ } static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; interworking_next_anqp_fetch(wpa_s); } static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s, struct wpa_bss *bss) { struct wpabuf *buf; int ret = 0; int res; u16 info_ids[8]; size_t num_info_ids = 0; struct wpabuf *extra = NULL; int all = wpa_s->fetch_all_anqp; wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR, MAC2STR(bss->bssid)); wpa_s->interworking_gas_bss = bss; info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST; if (all) { info_ids[num_info_ids++] = ANQP_VENUE_NAME; info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE; } if (all || (cred_with_roaming_consortium(wpa_s) && additional_roaming_consortiums(bss))) info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM; if (all) info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY; if (all || cred_with_nai_realm(wpa_s)) info_ids[num_info_ids++] = ANQP_NAI_REALM; if (all || cred_with_3gpp(wpa_s)) info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK; if (all || cred_with_domain(wpa_s)) info_ids[num_info_ids++] = ANQP_DOMAIN_NAME; wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info", (u8 *) info_ids, num_info_ids * 2); #ifdef CONFIG_HS20 if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) { u8 *len_pos; extra = wpabuf_alloc(100); if (!extra) return -1; len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC); wpabuf_put_be24(extra, OUI_WFA); wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE); wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST); wpabuf_put_u8(extra, 0); /* Reserved */ wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST); if (all) { wpabuf_put_u8(extra, HS20_STYPE_OPERATOR_FRIENDLY_NAME); wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS); wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY); wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS); } gas_anqp_set_element_len(extra, len_pos); } #endif /* CONFIG_HS20 */ buf = anqp_build_req(info_ids, num_info_ids, extra); wpabuf_free(extra); if (buf == NULL) return -1; res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf, interworking_anqp_resp_cb, wpa_s); if (res < 0) { wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request"); wpabuf_free(buf); ret = -1; eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL); } else wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token " "%u", res); return ret; } struct nai_realm_eap { u8 method; u8 inner_method; enum nai_realm_eap_auth_inner_non_eap inner_non_eap; u8 cred_type; u8 tunneled_cred_type; }; struct nai_realm { u8 encoding; char *realm; u8 eap_count; struct nai_realm_eap *eap; }; static void nai_realm_free(struct nai_realm *realms, u16 count) { u16 i; if (realms == NULL) return; for (i = 0; i < count; i++) { os_free(realms[i].eap); os_free(realms[i].realm); } os_free(realms); } static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos, const u8 *end) { u8 elen, auth_count, a; const u8 *e_end; if (pos + 3 > end) { wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields"); return NULL; } elen = *pos++; if (pos + elen > end || elen < 2) { wpa_printf(MSG_DEBUG, "No room for EAP Method subfield"); return NULL; } e_end = pos + elen; e->method = *pos++; auth_count = *pos++; wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u", elen, e->method, auth_count); for (a = 0; a < auth_count; a++) { u8 id, len; if (pos + 2 > end || pos + 2 + pos[1] > end) { wpa_printf(MSG_DEBUG, "No room for Authentication " "Parameter subfield"); return NULL; } id = *pos++; len = *pos++; switch (id) { case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH: if (len < 1) break; e->inner_non_eap = *pos; if (e->method != EAP_TYPE_TTLS) break; switch (*pos) { case NAI_REALM_INNER_NON_EAP_PAP: wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP"); break; case NAI_REALM_INNER_NON_EAP_CHAP: wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP"); break; case NAI_REALM_INNER_NON_EAP_MSCHAP: wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP"); break; case NAI_REALM_INNER_NON_EAP_MSCHAPV2: wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2"); break; } break; case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD: if (len < 1) break; e->inner_method = *pos; wpa_printf(MSG_DEBUG, "Inner EAP method: %u", e->inner_method); break; case NAI_REALM_EAP_AUTH_CRED_TYPE: if (len < 1) break; e->cred_type = *pos; wpa_printf(MSG_DEBUG, "Credential Type: %u", e->cred_type); break; case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE: if (len < 1) break; e->tunneled_cred_type = *pos; wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential " "Type: %u", e->tunneled_cred_type); break; default: wpa_printf(MSG_DEBUG, "Unsupported Authentication " "Parameter: id=%u len=%u", id, len); wpa_hexdump(MSG_DEBUG, "Authentication Parameter " "Value", pos, len); break; } pos += len; } return e_end; } static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos, const u8 *end) { u16 len; const u8 *f_end; u8 realm_len, e; if (end - pos < 4) { wpa_printf(MSG_DEBUG, "No room for NAI Realm Data " "fixed fields"); return NULL; } len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */ pos += 2; if (pos + len > end || len < 3) { wpa_printf(MSG_DEBUG, "No room for NAI Realm Data " "(len=%u; left=%u)", len, (unsigned int) (end - pos)); return NULL; } f_end = pos + len; r->encoding = *pos++; realm_len = *pos++; if (pos + realm_len > f_end) { wpa_printf(MSG_DEBUG, "No room for NAI Realm " "(len=%u; left=%u)", realm_len, (unsigned int) (f_end - pos)); return NULL; } wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len); r->realm = dup_binstr(pos, realm_len); if (r->realm == NULL) return NULL; pos += realm_len; if (pos + 1 > f_end) { wpa_printf(MSG_DEBUG, "No room for EAP Method Count"); return NULL; } r->eap_count = *pos++; wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count); if (pos + r->eap_count * 3 > f_end) { wpa_printf(MSG_DEBUG, "No room for EAP Methods"); return NULL; } r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap)); if (r->eap == NULL) return NULL; for (e = 0; e < r->eap_count; e++) { pos = nai_realm_parse_eap(&r->eap[e], pos, f_end); if (pos == NULL) return NULL; } return f_end; } static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count) { struct nai_realm *realm; const u8 *pos, *end; u16 i, num; if (anqp == NULL || wpabuf_len(anqp) < 2) return NULL; pos = wpabuf_head_u8(anqp); end = pos + wpabuf_len(anqp); num = WPA_GET_LE16(pos); wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num); pos += 2; if (num * 5 > end - pos) { wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not " "enough data (%u octets) for that many realms", num, (unsigned int) (end - pos)); return NULL; } realm = os_calloc(num, sizeof(struct nai_realm)); if (realm == NULL) return NULL; for (i = 0; i < num; i++) { pos = nai_realm_parse_realm(&realm[i], pos, end); if (pos == NULL) { nai_realm_free(realm, num); return NULL; } } *count = num; return realm; } static int nai_realm_match(struct nai_realm *realm, const char *home_realm) { char *tmp, *pos, *end; int match = 0; if (realm->realm == NULL || home_realm == NULL) return 0; if (os_strchr(realm->realm, ';') == NULL) return os_strcasecmp(realm->realm, home_realm) == 0; tmp = os_strdup(realm->realm); if (tmp == NULL) return 0; pos = tmp; while (*pos) { end = os_strchr(pos, ';'); if (end) *end = '\0'; if (os_strcasecmp(pos, home_realm) == 0) { match = 1; break; } if (end == NULL) break; pos = end + 1; } os_free(tmp); return match; } static int nai_realm_cred_username(struct nai_realm_eap *eap) { if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) return 0; /* method not supported */ if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP && eap->method != EAP_TYPE_FAST) { /* Only tunneled methods with username/password supported */ return 0; } if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) { if (eap->inner_method && eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) return 0; if (!eap->inner_method && eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL) return 0; } if (eap->method == EAP_TYPE_TTLS) { if (eap->inner_method == 0 && eap->inner_non_eap == 0) return 1; /* Assume TTLS/MSCHAPv2 is used */ if (eap->inner_method && eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) return 0; if (eap->inner_non_eap && eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP && eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP && eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP && eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2) return 0; } if (eap->inner_method && eap->inner_method != EAP_TYPE_GTC && eap->inner_method != EAP_TYPE_MSCHAPV2) return 0; return 1; } static int nai_realm_cred_cert(struct nai_realm_eap *eap) { if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) return 0; /* method not supported */ if (eap->method != EAP_TYPE_TLS) { /* Only EAP-TLS supported for credential authentication */ return 0; } return 1; } static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred, struct nai_realm *realm) { u8 e; if (cred == NULL || cred->username == NULL || cred->username[0] == '\0' || ((cred->password == NULL || cred->password[0] == '\0') && (cred->private_key == NULL || cred->private_key[0] == '\0'))) return NULL; for (e = 0; e < realm->eap_count; e++) { struct nai_realm_eap *eap = &realm->eap[e]; if (cred->password && cred->password[0] && nai_realm_cred_username(eap)) return eap; if (cred->private_key && cred->private_key[0] && nai_realm_cred_cert(eap)) return eap; } return NULL; } #ifdef INTERWORKING_3GPP static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len) { u8 plmn[3], plmn2[3]; const u8 *pos, *end; u8 udhl; /* * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network * operator is allowed to include only two digits of the MNC, so allow * matches based on both two and three digit MNC assumptions. Since some * SIM/USIM cards may not expose MNC length conveniently, we may be * provided the default MNC length 3 here and as such, checking with MNC * length 2 is justifiable even though 3GPP TS 24.234 does not mention * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used * with otherwise matching values would not be good idea in general, so * this should not result in selecting incorrect networks. */ /* Match with 3 digit MNC */ plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4); plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4); plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4); /* Match with 2 digit MNC */ plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4); plmn2[1] = (imsi[2] - '0') | 0xf0; plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4); if (anqp == NULL) return 0; pos = wpabuf_head_u8(anqp); end = pos + wpabuf_len(anqp); if (pos + 2 > end) return 0; if (*pos != 0) { wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos); return 0; } pos++; udhl = *pos++; if (pos + udhl > end) { wpa_printf(MSG_DEBUG, "Invalid UDHL"); return 0; } end = pos + udhl; wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)", plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2], imsi, mnc_len); while (pos + 2 <= end) { u8 iei, len; const u8 *l_end; iei = *pos++; len = *pos++ & 0x7f; if (pos + len > end) break; l_end = pos + len; if (iei == 0 && len > 0) { /* PLMN List */ u8 num, i; wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element", pos, len); num = *pos++; for (i = 0; i < num; i++) { if (pos + 3 > l_end) break; if (os_memcmp(pos, plmn, 3) == 0 || os_memcmp(pos, plmn2, 3) == 0) return 1; /* Found matching PLMN */ pos += 3; } } else { wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element", pos, len); } pos = l_end; } return 0; } static int build_root_nai(char *nai, size_t nai_len, const char *imsi, size_t mnc_len, char prefix) { const char *sep, *msin; char *end, *pos; size_t msin_len, plmn_len; /* * TS 23.003, Clause 14 (3GPP to WLAN Interworking) * Root NAI: * @wlan.mnc.mcc.3gppnetwork.org * is zero-padded to three digits in case two-digit MNC is used */ if (imsi == NULL || os_strlen(imsi) > 16) { wpa_printf(MSG_DEBUG, "No valid IMSI available"); return -1; } sep = os_strchr(imsi, '-'); if (sep) { plmn_len = sep - imsi; msin = sep + 1; } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) { plmn_len = 3 + mnc_len; msin = imsi + plmn_len; } else return -1; if (plmn_len != 5 && plmn_len != 6) return -1; msin_len = os_strlen(msin); pos = nai; end = nai + nai_len; if (prefix) *pos++ = prefix; os_memcpy(pos, imsi, plmn_len); pos += plmn_len; os_memcpy(pos, msin, msin_len); pos += msin_len; pos += os_snprintf(pos, end - pos, "@wlan.mnc"); if (plmn_len == 5) { *pos++ = '0'; *pos++ = imsi[3]; *pos++ = imsi[4]; } else { *pos++ = imsi[3]; *pos++ = imsi[4]; *pos++ = imsi[5]; } pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org", imsi[0], imsi[1], imsi[2]); return 0; } static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix) { char nai[100]; if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0) return -1; return wpa_config_set_quoted(ssid, "identity", nai); } #endif /* INTERWORKING_3GPP */ static int already_connected(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpa_bss *bss) { struct wpa_ssid *ssid; if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL) return 0; ssid = wpa_s->current_ssid; if (ssid->parent_cred != cred) return 0; if (ssid->ssid_len != bss->ssid_len || os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0) return 0; return 1; } static void remove_duplicate_network(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpa_bss *bss) { struct wpa_ssid *ssid; for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { if (ssid->parent_cred != cred) continue; if (ssid->ssid_len != bss->ssid_len || os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0) continue; break; } if (ssid == NULL) return; wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential"); if (ssid == wpa_s->current_ssid) { wpa_sm_set_config(wpa_s->wpa, NULL); eapol_sm_notify_config(wpa_s->eapol, NULL, NULL); wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_DEAUTH_LEAVING); } wpas_notify_network_removed(wpa_s, ssid); wpa_config_remove_network(wpa_s->conf, ssid->id); } static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid) { if (wpa_config_set(ssid, "key_mgmt", wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ? "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP", 0) < 0) return -1; if (wpa_config_set(ssid, "proto", "RSN", 0) < 0) return -1; if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0) return -1; return 0; } static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpa_bss *bss) { #ifdef INTERWORKING_3GPP struct wpa_ssid *ssid; int eap_type; int res; char prefix; if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) return -1; wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)", MAC2STR(bss->bssid)); if (already_connected(wpa_s, cred, bss)) { wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR, MAC2STR(bss->bssid)); return 0; } remove_duplicate_network(wpa_s, cred, bss); ssid = wpa_config_add_network(wpa_s->conf); if (ssid == NULL) return -1; ssid->parent_cred = cred; wpas_notify_network_added(wpa_s, ssid); wpa_config_set_network_defaults(ssid); ssid->priority = cred->priority; ssid->temporary = 1; ssid->ssid = os_zalloc(bss->ssid_len + 1); if (ssid->ssid == NULL) goto fail; os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len); ssid->ssid_len = bss->ssid_len; if (interworking_set_hs20_params(wpa_s, ssid) < 0) goto fail; eap_type = EAP_TYPE_SIM; if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard)) eap_type = EAP_TYPE_AKA; if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) { if (cred->eap_method[0].method == EAP_TYPE_SIM || cred->eap_method[0].method == EAP_TYPE_AKA || cred->eap_method[0].method == EAP_TYPE_AKA_PRIME) eap_type = cred->eap_method[0].method; } switch (eap_type) { case EAP_TYPE_SIM: prefix = '1'; res = wpa_config_set(ssid, "eap", "SIM", 0); break; case EAP_TYPE_AKA: prefix = '0'; res = wpa_config_set(ssid, "eap", "AKA", 0); break; case EAP_TYPE_AKA_PRIME: prefix = '6'; res = wpa_config_set(ssid, "eap", "AKA'", 0); break; default: res = -1; break; } if (res < 0) { wpa_printf(MSG_DEBUG, "Selected EAP method (%d) not supported", eap_type); goto fail; } if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) { wpa_printf(MSG_DEBUG, "Failed to set Root NAI"); goto fail; } if (cred->milenage && cred->milenage[0]) { if (wpa_config_set_quoted(ssid, "password", cred->milenage) < 0) goto fail; } else if (cred->pcsc) { if (wpa_config_set_quoted(ssid, "pcsc", "") < 0) goto fail; if (wpa_s->conf->pcsc_pin && wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin) < 0) goto fail; } if (cred->password && cred->password[0] && wpa_config_set_quoted(ssid, "password", cred->password) < 0) goto fail; wpa_s->next_ssid = ssid; wpa_config_update_prio_list(wpa_s->conf); interworking_reconnect(wpa_s); return 0; fail: wpas_notify_network_removed(wpa_s, ssid); wpa_config_remove_network(wpa_s->conf, ssid->id); #endif /* INTERWORKING_3GPP */ return -1; } static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id, size_t rc_len) { const u8 *pos, *end; u8 lens; if (ie == NULL) return 0; pos = ie + 2; end = ie + 2 + ie[1]; /* Roaming Consortium element: * Number of ANQP OIs * OI #1 and #2 lengths * OI #1, [OI #2], [OI #3] */ if (pos + 2 > end) return 0; pos++; /* skip Number of ANQP OIs */ lens = *pos++; if (pos + (lens & 0x0f) + (lens >> 4) > end) return 0; if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0) return 1; pos += lens & 0x0f; if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0) return 1; pos += lens >> 4; if (pos < end && (size_t) (end - pos) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0) return 1; return 0; } static int roaming_consortium_anqp_match(const struct wpabuf *anqp, const u8 *rc_id, size_t rc_len) { const u8 *pos, *end; u8 len; if (anqp == NULL) return 0; pos = wpabuf_head(anqp); end = pos + wpabuf_len(anqp); /* Set of duples */ while (pos < end) { len = *pos++; if (pos + len > end) break; if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0) return 1; pos += len; } return 0; } static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp, const u8 *rc_id, size_t rc_len) { return roaming_consortium_element_match(ie, rc_id, rc_len) || roaming_consortium_anqp_match(anqp, rc_id, rc_len); } static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss) { const u8 *ie; if (cred->required_roaming_consortium_len == 0) return 0; ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM); if (ie == NULL && (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL)) return 1; return !roaming_consortium_match(ie, bss->anqp ? bss->anqp->roaming_consortium : NULL, cred->required_roaming_consortium, cred->required_roaming_consortium_len); } static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss) { size_t i; if (!cred->excluded_ssid) return 0; for (i = 0; i < cred->num_excluded_ssid; i++) { struct excluded_ssid *e = &cred->excluded_ssid[i]; if (bss->ssid_len == e->ssid_len && os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0) return 1; } return 0; } static struct wpa_cred * interworking_credentials_available_roaming_consortium( struct wpa_supplicant *wpa_s, struct wpa_bss *bss) { struct wpa_cred *cred, *selected = NULL; const u8 *ie; ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM); if (ie == NULL && (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL)) return NULL; if (wpa_s->conf->cred == NULL) return NULL; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->roaming_consortium_len == 0) continue; if (!roaming_consortium_match(ie, bss->anqp ? bss->anqp->roaming_consortium : NULL, cred->roaming_consortium, cred->roaming_consortium_len)) continue; if (cred_excluded_ssid(cred, bss)) continue; if (cred_no_required_oi_match(cred, bss)) continue; if (selected == NULL || selected->priority < cred->priority) selected = cred; } return selected; } static int interworking_set_eap_params(struct wpa_ssid *ssid, struct wpa_cred *cred, int ttls) { if (cred->eap_method) { ttls = cred->eap_method->vendor == EAP_VENDOR_IETF && cred->eap_method->method == EAP_TYPE_TTLS; os_free(ssid->eap.eap_methods); ssid->eap.eap_methods = os_malloc(sizeof(struct eap_method_type) * 2); if (ssid->eap.eap_methods == NULL) return -1; os_memcpy(ssid->eap.eap_methods, cred->eap_method, sizeof(*cred->eap_method)); ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF; ssid->eap.eap_methods[1].method = EAP_TYPE_NONE; } if (ttls && cred->username && cred->username[0]) { const char *pos; char *anon; /* Use anonymous NAI in Phase 1 */ pos = os_strchr(cred->username, '@'); if (pos) { size_t buflen = 9 + os_strlen(pos) + 1; anon = os_malloc(buflen); if (anon == NULL) return -1; os_snprintf(anon, buflen, "anonymous%s", pos); } else if (cred->realm) { size_t buflen = 10 + os_strlen(cred->realm) + 1; anon = os_malloc(buflen); if (anon == NULL) return -1; os_snprintf(anon, buflen, "anonymous@%s", cred->realm); } else { anon = os_strdup("anonymous"); if (anon == NULL) return -1; } if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) < 0) { os_free(anon); return -1; } os_free(anon); } if (cred->username && cred->username[0] && wpa_config_set_quoted(ssid, "identity", cred->username) < 0) return -1; if (cred->password && cred->password[0]) { if (cred->ext_password && wpa_config_set(ssid, "password", cred->password, 0) < 0) return -1; if (!cred->ext_password && wpa_config_set_quoted(ssid, "password", cred->password) < 0) return -1; } if (cred->client_cert && cred->client_cert[0] && wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0) return -1; #ifdef ANDROID if (cred->private_key && os_strncmp(cred->private_key, "keystore://", 11) == 0) { /* Use OpenSSL engine configuration for Android keystore */ if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 || wpa_config_set_quoted(ssid, "key_id", cred->private_key + 11) < 0 || wpa_config_set(ssid, "engine", "1", 0) < 0) return -1; } else #endif /* ANDROID */ if (cred->private_key && cred->private_key[0] && wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0) return -1; if (cred->private_key_passwd && cred->private_key_passwd[0] && wpa_config_set_quoted(ssid, "private_key_passwd", cred->private_key_passwd) < 0) return -1; if (cred->phase1) { os_free(ssid->eap.phase1); ssid->eap.phase1 = os_strdup(cred->phase1); } if (cred->phase2) { os_free(ssid->eap.phase2); ssid->eap.phase2 = os_strdup(cred->phase2); } if (cred->ca_cert && cred->ca_cert[0] && wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0) return -1; if (cred->domain_suffix_match && cred->domain_suffix_match[0] && wpa_config_set_quoted(ssid, "domain_suffix_match", cred->domain_suffix_match) < 0) return -1; return 0; } static int interworking_connect_roaming_consortium( struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpa_bss *bss) { struct wpa_ssid *ssid; wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on " "roaming consortium match", MAC2STR(bss->bssid)); if (already_connected(wpa_s, cred, bss)) { wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR, MAC2STR(bss->bssid)); return 0; } remove_duplicate_network(wpa_s, cred, bss); ssid = wpa_config_add_network(wpa_s->conf); if (ssid == NULL) return -1; ssid->parent_cred = cred; wpas_notify_network_added(wpa_s, ssid); wpa_config_set_network_defaults(ssid); ssid->priority = cred->priority; ssid->temporary = 1; ssid->ssid = os_zalloc(bss->ssid_len + 1); if (ssid->ssid == NULL) goto fail; os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len); ssid->ssid_len = bss->ssid_len; if (interworking_set_hs20_params(wpa_s, ssid) < 0) goto fail; if (cred->eap_method == NULL) { wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for " "credential using roaming consortium"); goto fail; } if (interworking_set_eap_params( ssid, cred, cred->eap_method->vendor == EAP_VENDOR_IETF && cred->eap_method->method == EAP_TYPE_TTLS) < 0) goto fail; wpa_s->next_ssid = ssid; wpa_config_update_prio_list(wpa_s->conf); interworking_reconnect(wpa_s); return 0; fail: wpas_notify_network_removed(wpa_s, ssid); wpa_config_remove_network(wpa_s->conf, ssid->id); return -1; } int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss) { struct wpa_cred *cred, *cred_rc, *cred_3gpp; struct wpa_ssid *ssid; struct nai_realm *realm; struct nai_realm_eap *eap = NULL; u16 count, i; char buf[100]; if (wpa_s->conf->cred == NULL || bss == NULL) return -1; if (disallowed_bssid(wpa_s, bss->bssid) || disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) { wpa_printf(MSG_DEBUG, "Interworking: Reject connection to disallowed BSS " MACSTR, MAC2STR(bss->bssid)); return -1; } if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) { /* * We currently support only HS 2.0 networks and those are * required to use WPA2-Enterprise. */ wpa_printf(MSG_DEBUG, "Interworking: Network does not use " "RSN"); return -1; } cred_rc = interworking_credentials_available_roaming_consortium(wpa_s, bss); if (cred_rc) { wpa_printf(MSG_DEBUG, "Interworking: Highest roaming " "consortium matching credential priority %d", cred_rc->priority); } cred = interworking_credentials_available_realm(wpa_s, bss); if (cred) { wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm list " "matching credential priority %d", cred->priority); } cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss); if (cred_3gpp) { wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP matching " "credential priority %d", cred_3gpp->priority); } if (cred_rc && (cred == NULL || cred_rc->priority >= cred->priority) && (cred_3gpp == NULL || cred_rc->priority >= cred_3gpp->priority)) return interworking_connect_roaming_consortium(wpa_s, cred_rc, bss); if (cred_3gpp && (cred == NULL || cred_3gpp->priority >= cred->priority)) { return interworking_connect_3gpp(wpa_s, cred_3gpp, bss); } if (cred == NULL) { wpa_printf(MSG_DEBUG, "Interworking: No matching credentials " "found for " MACSTR, MAC2STR(bss->bssid)); return -1; } realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL, &count); if (realm == NULL) { wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI " "Realm list from " MACSTR, MAC2STR(bss->bssid)); return -1; } for (i = 0; i < count; i++) { if (!nai_realm_match(&realm[i], cred->realm)) continue; eap = nai_realm_find_eap(cred, &realm[i]); if (eap) break; } if (!eap) { wpa_printf(MSG_DEBUG, "Interworking: No matching credentials " "and EAP method found for " MACSTR, MAC2STR(bss->bssid)); nai_realm_free(realm, count); return -1; } wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR, MAC2STR(bss->bssid)); if (already_connected(wpa_s, cred, bss)) { wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR, MAC2STR(bss->bssid)); nai_realm_free(realm, count); return 0; } remove_duplicate_network(wpa_s, cred, bss); ssid = wpa_config_add_network(wpa_s->conf); if (ssid == NULL) { nai_realm_free(realm, count); return -1; } ssid->parent_cred = cred; wpas_notify_network_added(wpa_s, ssid); wpa_config_set_network_defaults(ssid); ssid->priority = cred->priority; ssid->temporary = 1; ssid->ssid = os_zalloc(bss->ssid_len + 1); if (ssid->ssid == NULL) goto fail; os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len); ssid->ssid_len = bss->ssid_len; if (interworking_set_hs20_params(wpa_s, ssid) < 0) goto fail; if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF, eap->method), 0) < 0) goto fail; switch (eap->method) { case EAP_TYPE_TTLS: if (eap->inner_method) { os_snprintf(buf, sizeof(buf), "\"autheap=%s\"", eap_get_name(EAP_VENDOR_IETF, eap->inner_method)); if (wpa_config_set(ssid, "phase2", buf, 0) < 0) goto fail; break; } switch (eap->inner_non_eap) { case NAI_REALM_INNER_NON_EAP_PAP: if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) < 0) goto fail; break; case NAI_REALM_INNER_NON_EAP_CHAP: if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0) < 0) goto fail; break; case NAI_REALM_INNER_NON_EAP_MSCHAP: if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"", 0) < 0) goto fail; break; case NAI_REALM_INNER_NON_EAP_MSCHAPV2: if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"", 0) < 0) goto fail; break; default: /* EAP params were not set - assume TTLS/MSCHAPv2 */ if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"", 0) < 0) goto fail; break; } break; case EAP_TYPE_PEAP: case EAP_TYPE_FAST: if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"", 0) < 0) goto fail; if (wpa_config_set(ssid, "pac_file", "\"blob://pac_interworking\"", 0) < 0) goto fail; os_snprintf(buf, sizeof(buf), "\"auth=%s\"", eap_get_name(EAP_VENDOR_IETF, eap->inner_method ? eap->inner_method : EAP_TYPE_MSCHAPV2)); if (wpa_config_set(ssid, "phase2", buf, 0) < 0) goto fail; break; case EAP_TYPE_TLS: break; } if (interworking_set_eap_params(ssid, cred, eap->method == EAP_TYPE_TTLS) < 0) goto fail; nai_realm_free(realm, count); wpa_s->next_ssid = ssid; wpa_config_update_prio_list(wpa_s->conf); interworking_reconnect(wpa_s); return 0; fail: wpas_notify_network_removed(wpa_s, ssid); wpa_config_remove_network(wpa_s->conf, ssid->id); nai_realm_free(realm, count); return -1; } static struct wpa_cred * interworking_credentials_available_3gpp( struct wpa_supplicant *wpa_s, struct wpa_bss *bss) { struct wpa_cred *selected = NULL; #ifdef INTERWORKING_3GPP struct wpa_cred *cred; int ret; if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) return NULL; #ifdef CONFIG_EAP_PROXY if (!wpa_s->imsi[0]) { size_t len; wpa_printf(MSG_DEBUG, "Interworking: IMSI not available - try to read again through eap_proxy"); wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol, wpa_s->imsi, &len); if (wpa_s->mnc_len > 0) { wpa_s->imsi[len] = '\0'; wpa_printf(MSG_DEBUG, "eap_proxy: IMSI %s (MNC length %d)", wpa_s->imsi, wpa_s->mnc_len); } else { wpa_printf(MSG_DEBUG, "eap_proxy: IMSI not available"); } } #endif /* CONFIG_EAP_PROXY */ for (cred = wpa_s->conf->cred; cred; cred = cred->next) { char *sep; const char *imsi; int mnc_len; char imsi_buf[16]; size_t msin_len; #ifdef PCSC_FUNCS if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard && wpa_s->imsi[0]) { imsi = wpa_s->imsi; mnc_len = wpa_s->mnc_len; goto compare; } #endif /* PCSC_FUNCS */ #ifdef CONFIG_EAP_PROXY if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) { imsi = wpa_s->imsi; mnc_len = wpa_s->mnc_len; goto compare; } #endif /* CONFIG_EAP_PROXY */ if (cred->imsi == NULL || !cred->imsi[0] || (!wpa_s->conf->external_sim && (cred->milenage == NULL || !cred->milenage[0]))) continue; sep = os_strchr(cred->imsi, '-'); if (sep == NULL || (sep - cred->imsi != 5 && sep - cred->imsi != 6)) continue; mnc_len = sep - cred->imsi - 3; os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len); sep++; msin_len = os_strlen(cred->imsi); if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1) msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1; os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len); imsi_buf[3 + mnc_len + msin_len] = '\0'; imsi = imsi_buf; #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY) compare: #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */ wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from " MACSTR, MAC2STR(bss->bssid)); ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len); wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not "); if (ret) { if (cred_excluded_ssid(cred, bss)) continue; if (cred_no_required_oi_match(cred, bss)) continue; if (selected == NULL || selected->priority < cred->priority) selected = cred; } } #endif /* INTERWORKING_3GPP */ return selected; } static struct wpa_cred * interworking_credentials_available_realm( struct wpa_supplicant *wpa_s, struct wpa_bss *bss) { struct wpa_cred *cred, *selected = NULL; struct nai_realm *realm; u16 count, i; if (bss->anqp == NULL || bss->anqp->nai_realm == NULL) return NULL; if (wpa_s->conf->cred == NULL) return NULL; wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from " MACSTR, MAC2STR(bss->bssid)); realm = nai_realm_parse(bss->anqp->nai_realm, &count); if (realm == NULL) { wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI " "Realm list from " MACSTR, MAC2STR(bss->bssid)); return NULL; } for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->realm == NULL) continue; for (i = 0; i < count; i++) { if (!nai_realm_match(&realm[i], cred->realm)) continue; if (nai_realm_find_eap(cred, &realm[i])) { if (cred_excluded_ssid(cred, bss)) continue; if (cred_no_required_oi_match(cred, bss)) continue; if (selected == NULL || selected->priority < cred->priority) selected = cred; break; } } } nai_realm_free(realm, count); return selected; } static struct wpa_cred * interworking_credentials_available( struct wpa_supplicant *wpa_s, struct wpa_bss *bss) { struct wpa_cred *cred, *cred2; if (disallowed_bssid(wpa_s, bss->bssid) || disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) { wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS " MACSTR, MAC2STR(bss->bssid)); return NULL; } cred = interworking_credentials_available_realm(wpa_s, bss); cred2 = interworking_credentials_available_3gpp(wpa_s, bss); if (cred && cred2 && cred2->priority >= cred->priority) cred = cred2; if (!cred) cred = cred2; cred2 = interworking_credentials_available_roaming_consortium(wpa_s, bss); if (cred && cred2 && cred2->priority >= cred->priority) cred = cred2; if (!cred) cred = cred2; return cred; } static int domain_name_list_contains(struct wpabuf *domain_names, const char *domain) { const u8 *pos, *end; size_t len; len = os_strlen(domain); pos = wpabuf_head(domain_names); end = pos + wpabuf_len(domain_names); while (pos + 1 < end) { if (pos + 1 + pos[0] > end) break; wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name", pos + 1, pos[0]); if (pos[0] == len && os_strncasecmp(domain, (const char *) (pos + 1), len) == 0) return 1; pos += 1 + pos[0]; } return 0; } int interworking_home_sp_cred(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpabuf *domain_names) { size_t i; int ret = -1; #ifdef INTERWORKING_3GPP char nai[100], *realm; char *imsi = NULL; int mnc_len = 0; if (cred->imsi) imsi = cred->imsi; #ifdef CONFIG_PCSC else if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard && wpa_s->imsi[0]) { imsi = wpa_s->imsi; mnc_len = wpa_s->mnc_len; } #endif /* CONFIG_PCSC */ #ifdef CONFIG_EAP_PROXY else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) { imsi = wpa_s->imsi; mnc_len = wpa_s->mnc_len; } #endif /* CONFIG_EAP_PROXY */ if (domain_names && imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) { realm = os_strchr(nai, '@'); if (realm) realm++; wpa_printf(MSG_DEBUG, "Interworking: Search for match " "with SIM/USIM domain %s", realm); if (realm && domain_name_list_contains(domain_names, realm)) return 1; if (realm) ret = 0; } #endif /* INTERWORKING_3GPP */ if (domain_names == NULL || cred->domain == NULL) return ret; for (i = 0; i < cred->num_domain; i++) { wpa_printf(MSG_DEBUG, "Interworking: Search for match with " "home SP FQDN %s", cred->domain[i]); if (domain_name_list_contains(domain_names, cred->domain[i])) return 1; } return 0; } static int interworking_home_sp(struct wpa_supplicant *wpa_s, struct wpabuf *domain_names) { struct wpa_cred *cred; if (domain_names == NULL || wpa_s->conf->cred == NULL) return -1; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { int res = interworking_home_sp_cred(wpa_s, cred, domain_names); if (res) return res; } return 0; } static int interworking_find_network_match(struct wpa_supplicant *wpa_s) { struct wpa_bss *bss; struct wpa_ssid *ssid; dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { if (wpas_network_disabled(wpa_s, ssid) || ssid->mode != WPAS_MODE_INFRA) continue; if (ssid->ssid_len != bss->ssid_len || os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) != 0) continue; /* * TODO: Consider more accurate matching of security * configuration similarly to what is done in events.c */ return 1; } } return 0; } static void interworking_select_network(struct wpa_supplicant *wpa_s) { struct wpa_bss *bss, *selected = NULL, *selected_home = NULL; int selected_prio = -999999, selected_home_prio = -999999; unsigned int count = 0; const char *type; int res; struct wpa_cred *cred; wpa_s->network_select = 0; dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { cred = interworking_credentials_available(wpa_s, bss); if (!cred) continue; if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) { /* * We currently support only HS 2.0 networks and those * are required to use WPA2-Enterprise. */ wpa_printf(MSG_DEBUG, "Interworking: Credential match " "with " MACSTR " but network does not use " "RSN", MAC2STR(bss->bssid)); continue; } count++; res = interworking_home_sp(wpa_s, bss->anqp ? bss->anqp->domain_name : NULL); if (res > 0) type = "home"; else if (res == 0) type = "roaming"; else type = "unknown"; wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s", MAC2STR(bss->bssid), type); if (wpa_s->auto_select || (wpa_s->conf->auto_interworking && wpa_s->auto_network_select)) { if (selected == NULL || cred->priority > selected_prio) { selected = bss; selected_prio = cred->priority; } if (res > 0 && (selected_home == NULL || cred->priority > selected_home_prio)) { selected_home = bss; selected_home_prio = cred->priority; } } } if (selected_home && selected_home != selected && selected_home_prio >= selected_prio) { /* Prefer network operated by the Home SP */ selected = selected_home; } if (count == 0) { /* * No matching network was found based on configured * credentials. Check whether any of the enabled network blocks * have matching APs. */ if (interworking_find_network_match(wpa_s)) { wpa_printf(MSG_DEBUG, "Interworking: Possible BSS " "match for enabled network configurations"); if (wpa_s->auto_select) interworking_reconnect(wpa_s); return; } if (wpa_s->auto_network_select) { wpa_printf(MSG_DEBUG, "Interworking: Continue " "scanning after ANQP fetch"); wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval, 0); return; } wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network " "with matching credentials found"); } if (selected) interworking_connect(wpa_s, selected); } static struct wpa_bss_anqp * interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss) { struct wpa_bss *other; if (is_zero_ether_addr(bss->hessid)) return NULL; /* Cannot be in the same homegenous ESS */ dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) { if (other == bss) continue; if (other->anqp == NULL) continue; if (other->anqp->roaming_consortium == NULL && other->anqp->nai_realm == NULL && other->anqp->anqp_3gpp == NULL && other->anqp->domain_name == NULL) continue; if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED)) continue; if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0) continue; if (bss->ssid_len != other->ssid_len || os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0) continue; wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with " "already fetched BSSID " MACSTR " and " MACSTR, MAC2STR(other->bssid), MAC2STR(bss->bssid)); other->anqp->users++; return other->anqp; } return NULL; } static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s) { struct wpa_bss *bss; int found = 0; const u8 *ie; if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) return; dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { if (!(bss->caps & IEEE80211_CAP_ESS)) continue; ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB); if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80)) continue; /* AP does not support Interworking */ if (disallowed_bssid(wpa_s, bss->bssid) || disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) continue; /* Disallowed BSS */ if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) { if (bss->anqp == NULL) { bss->anqp = interworking_match_anqp_info(wpa_s, bss); if (bss->anqp) { /* Shared data already fetched */ continue; } bss->anqp = wpa_bss_anqp_alloc(); if (bss->anqp == NULL) break; } found++; bss->flags |= WPA_BSS_ANQP_FETCH_TRIED; wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for " MACSTR, MAC2STR(bss->bssid)); interworking_anqp_send_req(wpa_s, bss); break; } } if (found == 0) { wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed"); wpa_s->fetch_anqp_in_progress = 0; if (wpa_s->network_select) interworking_select_network(wpa_s); } } void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s) { struct wpa_bss *bss; dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED; wpa_s->fetch_anqp_in_progress = 1; interworking_next_anqp_fetch(wpa_s); } int interworking_fetch_anqp(struct wpa_supplicant *wpa_s) { if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select) return 0; wpa_s->network_select = 0; wpa_s->fetch_all_anqp = 1; interworking_start_fetch_anqp(wpa_s); return 0; } void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s) { if (!wpa_s->fetch_anqp_in_progress) return; wpa_s->fetch_anqp_in_progress = 0; } int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, u16 info_ids[], size_t num_ids) { struct wpabuf *buf; int ret = 0; int freq; struct wpa_bss *bss; int res; freq = wpa_s->assoc_freq; bss = wpa_bss_get_bssid(wpa_s, dst); if (bss) { wpa_bss_anqp_unshare_alloc(bss); freq = bss->freq; } if (freq <= 0) return -1; wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)", MAC2STR(dst), (unsigned int) num_ids); buf = anqp_build_req(info_ids, num_ids, NULL); if (buf == NULL) return -1; res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s); if (res < 0) { wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request"); wpabuf_free(buf); ret = -1; } else wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token " "%u", res); return ret; } static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s, struct wpa_bss *bss, const u8 *sa, u16 info_id, const u8 *data, size_t slen) { const u8 *pos = data; struct wpa_bss_anqp *anqp = NULL; #ifdef CONFIG_HS20 u8 type; #endif /* CONFIG_HS20 */ if (bss) anqp = bss->anqp; switch (info_id) { case ANQP_CAPABILITY_LIST: wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR " ANQP Capability list", MAC2STR(sa)); break; case ANQP_VENUE_NAME: wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR " Venue Name", MAC2STR(sa)); wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen); if (anqp) { wpabuf_free(anqp->venue_name); anqp->venue_name = wpabuf_alloc_copy(pos, slen); } break; case ANQP_NETWORK_AUTH_TYPE: wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR " Network Authentication Type information", MAC2STR(sa)); wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication " "Type", pos, slen); if (anqp) { wpabuf_free(anqp->network_auth_type); anqp->network_auth_type = wpabuf_alloc_copy(pos, slen); } break; case ANQP_ROAMING_CONSORTIUM: wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR " Roaming Consortium list", MAC2STR(sa)); wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium", pos, slen); if (anqp) { wpabuf_free(anqp->roaming_consortium); anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen); } break; case ANQP_IP_ADDR_TYPE_AVAILABILITY: wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR " IP Address Type Availability information", MAC2STR(sa)); wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability", pos, slen); if (anqp) { wpabuf_free(anqp->ip_addr_type_availability); anqp->ip_addr_type_availability = wpabuf_alloc_copy(pos, slen); } break; case ANQP_NAI_REALM: wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR " NAI Realm list", MAC2STR(sa)); wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen); if (anqp) { wpabuf_free(anqp->nai_realm); anqp->nai_realm = wpabuf_alloc_copy(pos, slen); } break; case ANQP_3GPP_CELLULAR_NETWORK: wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR " 3GPP Cellular Network information", MAC2STR(sa)); wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network", pos, slen); if (anqp) { wpabuf_free(anqp->anqp_3gpp); anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen); } break; case ANQP_DOMAIN_NAME: wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR " Domain Name list", MAC2STR(sa)); wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen); if (anqp) { wpabuf_free(anqp->domain_name); anqp->domain_name = wpabuf_alloc_copy(pos, slen); } break; case ANQP_VENDOR_SPECIFIC: if (slen < 3) return; switch (WPA_GET_BE24(pos)) { #ifdef CONFIG_HS20 case OUI_WFA: pos += 3; slen -= 3; if (slen < 1) return; type = *pos++; slen--; switch (type) { case HS20_ANQP_OUI_TYPE: hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos, slen); break; default: wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP " "vendor type %u", type); break; } break; #endif /* CONFIG_HS20 */ default: wpa_printf(MSG_DEBUG, "Interworking: Unsupported " "vendor-specific ANQP OUI %06x", WPA_GET_BE24(pos)); return; } break; default: wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID " "%u", info_id); break; } } void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token, enum gas_query_result result, const struct wpabuf *adv_proto, const struct wpabuf *resp, u16 status_code) { struct wpa_supplicant *wpa_s = ctx; const u8 *pos; const u8 *end; u16 info_id; u16 slen; struct wpa_bss *bss = NULL, *tmp; if (result != GAS_QUERY_SUCCESS) return; pos = wpabuf_head(adv_proto); if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO || pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) { wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement " "Protocol in response"); return; } /* * If possible, select the BSS entry based on which BSS entry was used * for the request. This can help in cases where multiple BSS entries * may exist for the same AP. */ dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) { if (tmp == wpa_s->interworking_gas_bss && os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) { bss = tmp; break; } } if (bss == NULL) bss = wpa_bss_get_bssid(wpa_s, dst); pos = wpabuf_head(resp); end = pos + wpabuf_len(resp); while (pos < end) { if (pos + 4 > end) { wpa_printf(MSG_DEBUG, "ANQP: Invalid element"); break; } info_id = WPA_GET_LE16(pos); pos += 2; slen = WPA_GET_LE16(pos); pos += 2; if (pos + slen > end) { wpa_printf(MSG_DEBUG, "ANQP: Invalid element length " "for Info ID %u", info_id); break; } interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos, slen); pos += slen; } } static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s, struct wpa_scan_results *scan_res) { wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start " "ANQP fetch"); interworking_start_fetch_anqp(wpa_s); } int interworking_select(struct wpa_supplicant *wpa_s, int auto_select, int *freqs) { interworking_stop_fetch_anqp(wpa_s); wpa_s->network_select = 1; wpa_s->auto_network_select = 0; wpa_s->auto_select = !!auto_select; wpa_s->fetch_all_anqp = 0; wpa_printf(MSG_DEBUG, "Interworking: Start scan for network " "selection"); wpa_s->scan_res_handler = interworking_scan_res_handler; wpa_s->normal_scans = 0; wpa_s->scan_req = MANUAL_SCAN_REQ; os_free(wpa_s->manual_scan_freqs); wpa_s->manual_scan_freqs = freqs; wpa_s->after_wps = 0; wpa_s->known_wps_freq = 0; wpa_supplicant_req_scan(wpa_s, 0, 0); return 0; } static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token, enum gas_query_result result, const struct wpabuf *adv_proto, const struct wpabuf *resp, u16 status_code) { struct wpa_supplicant *wpa_s = ctx; struct wpabuf *n; wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR " dialog_token=%d status_code=%d resp_len=%d", MAC2STR(addr), dialog_token, status_code, resp ? (int) wpabuf_len(resp) : -1); if (!resp) return; n = wpabuf_dup(resp); if (n == NULL) return; wpabuf_free(wpa_s->prev_gas_resp); wpa_s->prev_gas_resp = wpa_s->last_gas_resp; os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN); wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token; wpa_s->last_gas_resp = n; os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN); wpa_s->last_gas_dialog_token = dialog_token; } int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst, const struct wpabuf *adv_proto, const struct wpabuf *query) { struct wpabuf *buf; int ret = 0; int freq; struct wpa_bss *bss; int res; size_t len; u8 query_resp_len_limit = 0, pame_bi = 0; freq = wpa_s->assoc_freq; bss = wpa_bss_get_bssid(wpa_s, dst); if (bss) freq = bss->freq; if (freq <= 0) return -1; wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)", MAC2STR(dst), freq); wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto); wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query); len = 3 + wpabuf_len(adv_proto) + 2; if (query) len += wpabuf_len(query); buf = gas_build_initial_req(0, len); if (buf == NULL) return -1; /* Advertisement Protocol IE */ wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO); wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */ wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) | (pame_bi ? 0x80 : 0)); wpabuf_put_buf(buf, adv_proto); /* GAS Query */ if (query) { wpabuf_put_le16(buf, wpabuf_len(query)); wpabuf_put_buf(buf, query); } else wpabuf_put_le16(buf, 0); res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s); if (res < 0) { wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request"); wpabuf_free(buf); ret = -1; } else wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token " "%u", res); return ret; }