/* * Wi-Fi Protected Setup - Registrar * Copyright (c) 2008-2016, 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/base64.h" #include "utils/eloop.h" #include "utils/uuid.h" #include "utils/list.h" #include "crypto/crypto.h" #include "crypto/sha256.h" #include "crypto/random.h" #include "common/ieee802_11_defs.h" #include "common/wpa_common.h" #include "wps_i.h" #include "wps_dev_attr.h" #include "wps_upnp.h" #include "wps_upnp_i.h" #ifndef CONFIG_WPS_STRICT #define WPS_WORKAROUNDS #endif /* CONFIG_WPS_STRICT */ #ifdef CONFIG_WPS_NFC struct wps_nfc_pw_token { struct dl_list list; u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN]; unsigned int peer_pk_hash_known:1; u16 pw_id; u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1]; size_t dev_pw_len; int pk_hash_provided_oob; /* whether own PK hash was provided OOB */ }; static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token) { dl_list_del(&token->list); bin_clear_free(token, sizeof(*token)); } static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id) { struct wps_nfc_pw_token *token, *prev; dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token, list) { if (pw_id == 0 || pw_id == token->pw_id) wps_remove_nfc_pw_token(token); } } static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens, u16 pw_id) { struct wps_nfc_pw_token *token; dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) { if (pw_id == token->pw_id) return token; } return NULL; } #else /* CONFIG_WPS_NFC */ #define wps_free_nfc_pw_tokens(t, p) do { } while (0) #endif /* CONFIG_WPS_NFC */ struct wps_uuid_pin { struct dl_list list; u8 uuid[WPS_UUID_LEN]; int wildcard_uuid; u8 *pin; size_t pin_len; #define PIN_LOCKED BIT(0) #define PIN_EXPIRES BIT(1) int flags; struct os_reltime expiration; u8 enrollee_addr[ETH_ALEN]; }; static void wps_free_pin(struct wps_uuid_pin *pin) { bin_clear_free(pin->pin, pin->pin_len); os_free(pin); } static void wps_remove_pin(struct wps_uuid_pin *pin) { dl_list_del(&pin->list); wps_free_pin(pin); } static void wps_free_pins(struct dl_list *pins) { struct wps_uuid_pin *pin, *prev; dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) wps_remove_pin(pin); } struct wps_pbc_session { struct wps_pbc_session *next; u8 addr[ETH_ALEN]; u8 uuid_e[WPS_UUID_LEN]; struct os_reltime timestamp; }; static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) { struct wps_pbc_session *prev; while (pbc) { prev = pbc; pbc = pbc->next; os_free(prev); } } struct wps_registrar_device { struct wps_registrar_device *next; struct wps_device_data dev; u8 uuid[WPS_UUID_LEN]; }; struct wps_registrar { struct wps_context *wps; int pbc; int selected_registrar; int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len); int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie, struct wpabuf *probe_resp_ie); void (*pin_needed_cb)(void *ctx, const u8 *uuid_e, const struct wps_device_data *dev); void (*reg_success_cb)(void *ctx, const u8 *mac_addr, const u8 *uuid_e, const u8 *dev_pw, size_t dev_pw_len); void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id, u16 sel_reg_config_methods); void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e, const u8 *pri_dev_type, u16 config_methods, u16 dev_password_id, u8 request_type, const char *dev_name); int (*lookup_pskfile_cb)(void *ctx, const u8 *mac_addr, const u8 **psk); void *cb_ctx; struct dl_list pins; struct dl_list nfc_pw_tokens; struct wps_pbc_session *pbc_sessions; int skip_cred_build; struct wpabuf *extra_cred; int disable_auto_conf; int sel_reg_union; int sel_reg_dev_password_id_override; int sel_reg_config_methods_override; int dualband; int force_per_enrollee_psk; struct wps_registrar_device *devices; int force_pbc_overlap; u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; u8 p2p_dev_addr[ETH_ALEN]; u8 pbc_ignore_uuid[WPS_UUID_LEN]; #ifdef WPS_WORKAROUNDS struct os_reltime pbc_ignore_start; #endif /* WPS_WORKAROUNDS */ /** * multi_ap_backhaul_ssid - SSID to supply to a Multi-AP backhaul * enrollee * * This SSID is used by the Registrar to fill in information for * Credentials when the enrollee advertises it is a Multi-AP backhaul * STA. */ u8 multi_ap_backhaul_ssid[SSID_MAX_LEN]; /** * multi_ap_backhaul_ssid_len - Length of multi_ap_backhaul_ssid in * octets */ size_t multi_ap_backhaul_ssid_len; /** * multi_ap_backhaul_network_key - The Network Key (PSK) for the * Multi-AP backhaul enrollee. * * This key can be either the ASCII passphrase (8..63 characters) or the * 32-octet PSK (64 hex characters). */ u8 *multi_ap_backhaul_network_key; /** * multi_ap_backhaul_network_key_len - Length of * multi_ap_backhaul_network_key in octets */ size_t multi_ap_backhaul_network_key_len; }; static int wps_set_ie(struct wps_registrar *reg); static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); static void wps_registrar_set_selected_timeout(void *eloop_ctx, void *timeout_ctx); static void wps_registrar_remove_pin(struct wps_registrar *reg, struct wps_uuid_pin *pin); static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, const u8 *addr) { int i; wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, MAC2STR(addr)); for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " "already in the list"); return; /* already in list */ } for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], ETH_ALEN); os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); } static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, const u8 *addr) { int i; wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, MAC2STR(addr)); for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) break; } if (i == WPS_MAX_AUTHORIZED_MACS) { wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " "list"); return; /* not in the list */ } for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], ETH_ALEN); os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, ETH_ALEN); wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); } static void wps_free_devices(struct wps_registrar_device *dev) { struct wps_registrar_device *prev; while (dev) { prev = dev; dev = dev->next; wps_device_data_free(&prev->dev); os_free(prev); } } static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, const u8 *addr) { struct wps_registrar_device *dev; for (dev = reg->devices; dev; dev = dev->next) { if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) return dev; } return NULL; } static void wps_device_clone_data(struct wps_device_data *dst, struct wps_device_data *src) { os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); #define WPS_STRDUP(n) \ os_free(dst->n); \ dst->n = src->n ? os_strdup(src->n) : NULL WPS_STRDUP(device_name); WPS_STRDUP(manufacturer); WPS_STRDUP(model_name); WPS_STRDUP(model_number); WPS_STRDUP(serial_number); #undef WPS_STRDUP } int wps_device_store(struct wps_registrar *reg, struct wps_device_data *dev, const u8 *uuid) { struct wps_registrar_device *d; d = wps_device_get(reg, dev->mac_addr); if (d == NULL) { d = os_zalloc(sizeof(*d)); if (d == NULL) return -1; d->next = reg->devices; reg->devices = d; } wps_device_clone_data(&d->dev, dev); os_memcpy(d->uuid, uuid, WPS_UUID_LEN); return 0; } static void wps_registrar_add_pbc_session(struct wps_registrar *reg, const u8 *addr, const u8 *uuid_e) { struct wps_pbc_session *pbc, *prev = NULL; struct os_reltime now; os_get_reltime(&now); pbc = reg->pbc_sessions; while (pbc) { if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { if (prev) prev->next = pbc->next; else reg->pbc_sessions = pbc->next; break; } prev = pbc; pbc = pbc->next; } if (!pbc) { pbc = os_zalloc(sizeof(*pbc)); if (pbc == NULL) return; os_memcpy(pbc->addr, addr, ETH_ALEN); if (uuid_e) os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); } pbc->next = reg->pbc_sessions; reg->pbc_sessions = pbc; pbc->timestamp = now; /* remove entries that have timed out */ prev = pbc; pbc = pbc->next; while (pbc) { if (os_reltime_expired(&now, &pbc->timestamp, WPS_PBC_WALK_TIME)) { prev->next = NULL; wps_free_pbc_sessions(pbc); break; } prev = pbc; pbc = pbc->next; } } static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, const u8 *uuid_e, const u8 *p2p_dev_addr) { struct wps_pbc_session *pbc, *prev = NULL, *tmp; pbc = reg->pbc_sessions; while (pbc) { if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 || (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) && os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 0)) { if (prev) prev->next = pbc->next; else reg->pbc_sessions = pbc->next; tmp = pbc; pbc = pbc->next; wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " "addr=" MACSTR, MAC2STR(tmp->addr)); wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", tmp->uuid_e, WPS_UUID_LEN); os_free(tmp); continue; } prev = pbc; pbc = pbc->next; } } int wps_registrar_pbc_overlap(struct wps_registrar *reg, const u8 *addr, const u8 *uuid_e) { int count = 0; struct wps_pbc_session *pbc; struct wps_pbc_session *first = NULL; struct os_reltime now; os_get_reltime(&now); wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); if (uuid_e) { wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", uuid_e, WPS_UUID_LEN); count++; } for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, MAC2STR(pbc->addr)); wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", pbc->uuid_e, WPS_UUID_LEN); if (os_reltime_expired(&now, &pbc->timestamp, WPS_PBC_WALK_TIME)) { wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired"); break; } if (first && os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); continue; /* same Enrollee */ } if (uuid_e == NULL || os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); count++; } if (first == NULL) first = pbc; } wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); return count > 1 ? 1 : 0; } static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) { wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", wps->wps_state); wpabuf_put_be16(msg, ATTR_WPS_STATE); wpabuf_put_be16(msg, 1); wpabuf_put_u8(msg, wps->wps_state); return 0; } #ifdef CONFIG_WPS_UPNP static void wps_registrar_free_pending_m2(struct wps_context *wps) { struct upnp_pending_message *p, *p2, *prev = NULL; p = wps->upnp_msgs; while (p) { if (p->type == WPS_M2 || p->type == WPS_M2D) { if (prev == NULL) wps->upnp_msgs = p->next; else prev->next = p->next; wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); p2 = p; p = p->next; wpabuf_free(p2->msg); os_free(p2); continue; } prev = p; p = p->next; } } #endif /* CONFIG_WPS_UPNP */ static int wps_build_ap_setup_locked(struct wps_context *wps, struct wpabuf *msg) { if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); wpabuf_put_be16(msg, 1); wpabuf_put_u8(msg, 1); } return 0; } static int wps_build_selected_registrar(struct wps_registrar *reg, struct wpabuf *msg) { if (!reg->sel_reg_union) return 0; wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); wpabuf_put_be16(msg, 1); wpabuf_put_u8(msg, 1); return 0; } static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, struct wpabuf *msg) { u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; if (!reg->sel_reg_union) return 0; if (reg->sel_reg_dev_password_id_override >= 0) id = reg->sel_reg_dev_password_id_override; wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); wpabuf_put_be16(msg, 2); wpabuf_put_be16(msg, id); return 0; } static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, struct wpabuf *msg) { u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; if (!reg->sel_reg_union) return 0; if (reg->sel_reg_dev_password_id_override >= 0) id = reg->sel_reg_dev_password_id_override; if (id != DEV_PW_PUSHBUTTON || !reg->dualband) return 0; return wps_build_uuid_e(msg, reg->wps->uuid); } static void wps_set_pushbutton(u16 *methods, u16 conf_methods) { *methods |= WPS_CONFIG_PUSHBUTTON; if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) == WPS_CONFIG_VIRT_PUSHBUTTON) *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) == WPS_CONFIG_PHY_PUSHBUTTON) *methods |= WPS_CONFIG_PHY_PUSHBUTTON; if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) != WPS_CONFIG_VIRT_PUSHBUTTON && (*methods & WPS_CONFIG_PHY_PUSHBUTTON) != WPS_CONFIG_PHY_PUSHBUTTON) { /* * Required to include virtual/physical flag, but we were not * configured with push button type, so have to default to one * of them. */ *methods |= WPS_CONFIG_PHY_PUSHBUTTON; } } static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, struct wpabuf *msg) { u16 methods; if (!reg->sel_reg_union) return 0; methods = reg->wps->config_methods; methods &= ~WPS_CONFIG_PUSHBUTTON; methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | WPS_CONFIG_PHY_PUSHBUTTON); if (reg->pbc) wps_set_pushbutton(&methods, reg->wps->config_methods); if (reg->sel_reg_config_methods_override >= 0) methods = reg->sel_reg_config_methods_override; wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", methods); wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); wpabuf_put_be16(msg, 2); wpabuf_put_be16(msg, methods); return 0; } static int wps_build_probe_config_methods(struct wps_registrar *reg, struct wpabuf *msg) { u16 methods; /* * These are the methods that the AP supports as an Enrollee for adding * external Registrars. */ methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | WPS_CONFIG_PHY_PUSHBUTTON); wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); wpabuf_put_be16(msg, 2); wpabuf_put_be16(msg, methods); return 0; } static int wps_build_config_methods_r(struct wps_registrar *reg, struct wpabuf *msg) { return wps_build_config_methods(msg, reg->wps->config_methods); } const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) { *count = 0; while (*count < WPS_MAX_AUTHORIZED_MACS) { if (is_zero_ether_addr(reg->authorized_macs_union[*count])) break; (*count)++; } return (const u8 *) reg->authorized_macs_union; } /** * wps_registrar_init - Initialize WPS Registrar data * @wps: Pointer to longterm WPS context * @cfg: Registrar configuration * Returns: Pointer to allocated Registrar data or %NULL on failure * * This function is used to initialize WPS Registrar functionality. It can be * used for a single Registrar run (e.g., when run in a supplicant) or multiple * runs (e.g., when run as an internal Registrar in an AP). Caller is * responsible for freeing the returned data with wps_registrar_deinit() when * Registrar functionality is not needed anymore. */ struct wps_registrar * wps_registrar_init(struct wps_context *wps, const struct wps_registrar_config *cfg) { struct wps_registrar *reg = os_zalloc(sizeof(*reg)); if (reg == NULL) return NULL; dl_list_init(®->pins); dl_list_init(®->nfc_pw_tokens); reg->wps = wps; reg->new_psk_cb = cfg->new_psk_cb; reg->set_ie_cb = cfg->set_ie_cb; reg->pin_needed_cb = cfg->pin_needed_cb; reg->reg_success_cb = cfg->reg_success_cb; reg->set_sel_reg_cb = cfg->set_sel_reg_cb; reg->enrollee_seen_cb = cfg->enrollee_seen_cb; reg->lookup_pskfile_cb = cfg->lookup_pskfile_cb; reg->cb_ctx = cfg->cb_ctx; reg->skip_cred_build = cfg->skip_cred_build; if (cfg->extra_cred) { reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, cfg->extra_cred_len); if (reg->extra_cred == NULL) { os_free(reg); return NULL; } } reg->disable_auto_conf = cfg->disable_auto_conf; reg->sel_reg_dev_password_id_override = -1; reg->sel_reg_config_methods_override = -1; reg->dualband = cfg->dualband; reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk; if (cfg->multi_ap_backhaul_ssid) { os_memcpy(reg->multi_ap_backhaul_ssid, cfg->multi_ap_backhaul_ssid, cfg->multi_ap_backhaul_ssid_len); reg->multi_ap_backhaul_ssid_len = cfg->multi_ap_backhaul_ssid_len; } if (cfg->multi_ap_backhaul_network_key) { reg->multi_ap_backhaul_network_key = os_memdup(cfg->multi_ap_backhaul_network_key, cfg->multi_ap_backhaul_network_key_len); if (reg->multi_ap_backhaul_network_key) reg->multi_ap_backhaul_network_key_len = cfg->multi_ap_backhaul_network_key_len; } if (wps_set_ie(reg)) { wps_registrar_deinit(reg); return NULL; } return reg; } void wps_registrar_flush(struct wps_registrar *reg) { if (reg == NULL) return; wps_free_pins(®->pins); wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); wps_free_pbc_sessions(reg->pbc_sessions); reg->pbc_sessions = NULL; wps_free_devices(reg->devices); reg->devices = NULL; #ifdef WPS_WORKAROUNDS reg->pbc_ignore_start.sec = 0; #endif /* WPS_WORKAROUNDS */ } /** * wps_registrar_deinit - Deinitialize WPS Registrar data * @reg: Registrar data from wps_registrar_init() */ void wps_registrar_deinit(struct wps_registrar *reg) { if (reg == NULL) return; eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); wps_registrar_flush(reg); wpabuf_clear_free(reg->extra_cred); bin_clear_free(reg->multi_ap_backhaul_network_key, reg->multi_ap_backhaul_network_key_len); os_free(reg); } static void wps_registrar_invalidate_unused(struct wps_registrar *reg) { struct wps_uuid_pin *pin; dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " "configured wildcard PIN"); wps_registrar_remove_pin(reg, pin); break; } } } /** * wps_registrar_add_pin - Configure a new PIN for Registrar * @reg: Registrar data from wps_registrar_init() * @addr: Enrollee MAC address or %NULL if not known * @uuid: UUID-E or %NULL for wildcard (any UUID) * @pin: PIN (Device Password) * @pin_len: Length of pin in octets * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout * Returns: 0 on success, -1 on failure */ int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, const u8 *uuid, const u8 *pin, size_t pin_len, int timeout) { struct wps_uuid_pin *p; p = os_zalloc(sizeof(*p)); if (p == NULL) return -1; if (addr) os_memcpy(p->enrollee_addr, addr, ETH_ALEN); if (uuid == NULL) p->wildcard_uuid = 1; else os_memcpy(p->uuid, uuid, WPS_UUID_LEN); p->pin = os_memdup(pin, pin_len); if (p->pin == NULL) { os_free(p); return -1; } p->pin_len = pin_len; if (timeout) { p->flags |= PIN_EXPIRES; os_get_reltime(&p->expiration); p->expiration.sec += timeout; } if (p->wildcard_uuid) wps_registrar_invalidate_unused(reg); dl_list_add(®->pins, &p->list); wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", timeout); wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); reg->selected_registrar = 1; reg->pbc = 0; if (addr) wps_registrar_add_authorized_mac(reg, addr); else wps_registrar_add_authorized_mac( reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); wps_registrar_selected_registrar_changed(reg, 0); eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_set_selected_timeout, reg, NULL); return 0; } static void wps_registrar_remove_pin(struct wps_registrar *reg, struct wps_uuid_pin *pin) { u8 *addr; u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; if (is_zero_ether_addr(pin->enrollee_addr)) addr = bcast; else addr = pin->enrollee_addr; wps_registrar_remove_authorized_mac(reg, addr); wps_remove_pin(pin); wps_registrar_selected_registrar_changed(reg, 0); } static void wps_registrar_expire_pins(struct wps_registrar *reg) { struct wps_uuid_pin *pin, *prev; struct os_reltime now; os_get_reltime(&now); dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) { if ((pin->flags & PIN_EXPIRES) && os_reltime_before(&pin->expiration, &now)) { wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", pin->uuid, WPS_UUID_LEN); wps_registrar_remove_pin(reg, pin); } } } /** * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN * @reg: Registrar data from wps_registrar_init() * @dev_pw: PIN to search for or %NULL to match any * @dev_pw_len: Length of dev_pw in octets * Returns: 0 on success, -1 if not wildcard PIN is enabled */ static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, const u8 *dev_pw, size_t dev_pw_len) { struct wps_uuid_pin *pin, *prev; dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) { if (dev_pw && pin->pin && (dev_pw_len != pin->pin_len || os_memcmp_const(dev_pw, pin->pin, dev_pw_len) != 0)) continue; /* different PIN */ if (pin->wildcard_uuid) { wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", pin->uuid, WPS_UUID_LEN); wps_registrar_remove_pin(reg, pin); return 0; } } return -1; } /** * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E * @reg: Registrar data from wps_registrar_init() * @uuid: UUID-E * Returns: 0 on success, -1 on failure (e.g., PIN not found) */ int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) { struct wps_uuid_pin *pin, *prev; dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) { if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", pin->uuid, WPS_UUID_LEN); wps_registrar_remove_pin(reg, pin); return 0; } } return -1; } static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, const u8 *uuid, size_t *pin_len) { struct wps_uuid_pin *pin, *found = NULL; int wildcard = 0; wps_registrar_expire_pins(reg); dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { if (!pin->wildcard_uuid && os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { found = pin; break; } } if (!found) { /* Check for wildcard UUIDs since none of the UUID-specific * PINs matched */ dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { if (pin->wildcard_uuid == 1 || pin->wildcard_uuid == 2) { wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " "PIN. Assigned it for this UUID-E"); wildcard = 1; os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); found = pin; break; } } } if (!found) return NULL; /* * Lock the PIN to avoid attacks based on concurrent re-use of the PIN * that could otherwise avoid PIN invalidations. */ if (found->flags & PIN_LOCKED) { wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " "allow concurrent re-use"); return NULL; } *pin_len = found->pin_len; found->flags |= PIN_LOCKED; if (wildcard) found->wildcard_uuid++; return found->pin; } /** * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E * @reg: Registrar data from wps_registrar_init() * @uuid: UUID-E * Returns: 0 on success, -1 on failure * * PINs are locked to enforce only one concurrent use. This function unlocks a * PIN to allow it to be used again. If the specified PIN was configured using * a wildcard UUID, it will be removed instead of allowing multiple uses. */ int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) { struct wps_uuid_pin *pin; dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { if (pin->wildcard_uuid == 3) { wpa_printf(MSG_DEBUG, "WPS: Invalidating used " "wildcard PIN"); return wps_registrar_invalidate_pin(reg, uuid); } pin->flags &= ~PIN_LOCKED; return 0; } } return -1; } static void wps_registrar_stop_pbc(struct wps_registrar *reg) { reg->selected_registrar = 0; reg->pbc = 0; os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); wps_registrar_remove_authorized_mac(reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); wps_registrar_selected_registrar_changed(reg, 0); } static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) { struct wps_registrar *reg = eloop_ctx; wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); wps_pbc_timeout_event(reg->wps); wps_registrar_stop_pbc(reg); } /** * wps_registrar_button_pushed - Notify Registrar that AP button was pushed * @reg: Registrar data from wps_registrar_init() * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL * indicates no such filtering * Returns: 0 on success, -1 on failure, -2 on session overlap * * This function is called on an AP when a push button is pushed to activate * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout * or when a PBC registration is completed. If more than one Enrollee in active * PBC mode has been detected during the monitor time (previous 2 minutes), the * PBC mode is not activated and -2 is returned to indicate session overlap. * This is skipped if a specific Enrollee is selected. */ int wps_registrar_button_pushed(struct wps_registrar *reg, const u8 *p2p_dev_addr) { if (p2p_dev_addr == NULL && wps_registrar_pbc_overlap(reg, NULL, NULL)) { wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " "mode"); wps_pbc_overlap_event(reg->wps); return -2; } wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); reg->force_pbc_overlap = 0; reg->selected_registrar = 1; reg->pbc = 1; if (p2p_dev_addr) os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); else os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); wps_registrar_add_authorized_mac(reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); wps_registrar_selected_registrar_changed(reg, 0); wps_pbc_active_event(reg->wps); eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, reg, NULL); return 0; } static void wps_registrar_pbc_completed(struct wps_registrar *reg) { wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); wps_registrar_stop_pbc(reg); wps_pbc_disable_event(reg->wps); } static void wps_registrar_pin_completed(struct wps_registrar *reg) { wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); reg->selected_registrar = 0; wps_registrar_selected_registrar_changed(reg, 0); } void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, const u8 *dev_pw, size_t dev_pw_len) { if (registrar->pbc) { wps_registrar_remove_pbc_session(registrar, uuid_e, NULL); wps_registrar_pbc_completed(registrar); #ifdef WPS_WORKAROUNDS os_get_reltime(®istrar->pbc_ignore_start); #endif /* WPS_WORKAROUNDS */ os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); } else { wps_registrar_pin_completed(registrar); } if (dev_pw && wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, dev_pw_len) == 0) { wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", dev_pw, dev_pw_len); } } int wps_registrar_wps_cancel(struct wps_registrar *reg) { if (reg->pbc) { wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); wps_registrar_pbc_timeout(reg, NULL); eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); return 1; } else if (reg->selected_registrar) { /* PIN Method */ wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); wps_registrar_pin_completed(reg); wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); return 1; } return 0; } /** * wps_registrar_probe_req_rx - Notify Registrar of Probe Request * @reg: Registrar data from wps_registrar_init() * @addr: MAC address of the Probe Request sender * @wps_data: WPS IE contents * * This function is called on an AP when a Probe Request with WPS IE is * received. This is used to track PBC mode use and to detect possible overlap * situation with other WPS APs. */ void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, const struct wpabuf *wps_data, int p2p_wildcard) { struct wps_parse_attr attr; int skip_add = 0; wpa_hexdump_buf(MSG_MSGDUMP, "WPS: Probe Request with WPS data received", wps_data); if (wps_parse_msg(wps_data, &attr) < 0) return; if (attr.config_methods == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " "Probe Request"); return; } if (attr.dev_password_id == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " "in Probe Request"); return; } if (reg->enrollee_seen_cb && attr.uuid_e && attr.primary_dev_type && attr.request_type && !p2p_wildcard) { char *dev_name = NULL; if (attr.dev_name) { dev_name = os_zalloc(attr.dev_name_len + 1); if (dev_name) { os_memcpy(dev_name, attr.dev_name, attr.dev_name_len); } } reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, attr.primary_dev_type, WPA_GET_BE16(attr.config_methods), WPA_GET_BE16(attr.dev_password_id), *attr.request_type, dev_name); os_free(dev_name); } if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) return; /* Not PBC */ wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " MACSTR, MAC2STR(addr)); if (attr.uuid_e == NULL) { wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " "UUID-E included"); return; } wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, WPS_UUID_LEN); #ifdef WPS_WORKAROUNDS if (reg->pbc_ignore_start.sec && os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { struct os_reltime now, dur; os_get_reltime(&now); os_reltime_sub(&now, ®->pbc_ignore_start, &dur); if (dur.sec >= 0 && dur.sec < 5) { wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " "based on Probe Request from the Enrollee " "that just completed PBC provisioning"); skip_add = 1; } else reg->pbc_ignore_start.sec = 0; } #endif /* WPS_WORKAROUNDS */ if (!skip_add) wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); reg->force_pbc_overlap = 1; wps_pbc_overlap_event(reg->wps); } } int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) { if (reg->new_psk_cb == NULL) return 0; return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk, psk_len); } static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, const struct wps_device_data *dev) { if (reg->pin_needed_cb == NULL) return; reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); } static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, const u8 *uuid_e, const u8 *dev_pw, size_t dev_pw_len) { if (reg->reg_success_cb == NULL) return; reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); } static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, struct wpabuf *probe_resp_ie) { return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); } static void wps_cb_set_sel_reg(struct wps_registrar *reg) { u16 methods = 0; if (reg->set_sel_reg_cb == NULL) return; if (reg->selected_registrar) { methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | WPS_CONFIG_PHY_PUSHBUTTON); if (reg->pbc) wps_set_pushbutton(&methods, reg->wps->config_methods); } wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " "config_methods=0x%x pbc=%d methods=0x%x", reg->selected_registrar, reg->wps->config_methods, reg->pbc, methods); reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, methods); } static int wps_cp_lookup_pskfile(struct wps_registrar *reg, const u8 *mac_addr, const u8 **psk) { if (!reg->lookup_pskfile_cb) return 0; return reg->lookup_pskfile_cb(reg->cb_ctx, mac_addr, psk); } static int wps_set_ie(struct wps_registrar *reg) { struct wpabuf *beacon; struct wpabuf *probe; const u8 *auth_macs; size_t count; size_t vendor_len = 0; int i; if (reg->set_ie_cb == NULL) return 0; for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { if (reg->wps->dev.vendor_ext[i]) { vendor_len += 2 + 2; vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); } } beacon = wpabuf_alloc(400 + vendor_len); if (beacon == NULL) return -1; probe = wpabuf_alloc(500 + vendor_len); if (probe == NULL) { wpabuf_free(beacon); return -1; } auth_macs = wps_authorized_macs(reg, &count); wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); if (wps_build_version(beacon) || wps_build_wps_state(reg->wps, beacon) || wps_build_ap_setup_locked(reg->wps, beacon) || wps_build_selected_registrar(reg, beacon) || wps_build_sel_reg_dev_password_id(reg, beacon) || wps_build_sel_reg_config_methods(reg, beacon) || wps_build_sel_pbc_reg_uuid_e(reg, beacon) || (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) || wps_build_wfa_ext(beacon, 0, auth_macs, count, 0) || wps_build_vendor_ext(®->wps->dev, beacon) || wps_build_application_ext(®->wps->dev, beacon)) { wpabuf_free(beacon); wpabuf_free(probe); return -1; } #ifdef CONFIG_P2P if (wps_build_dev_name(®->wps->dev, beacon) || wps_build_primary_dev_type(®->wps->dev, beacon)) { wpabuf_free(beacon); wpabuf_free(probe); return -1; } #endif /* CONFIG_P2P */ wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); if (wps_build_version(probe) || wps_build_wps_state(reg->wps, probe) || wps_build_ap_setup_locked(reg->wps, probe) || wps_build_selected_registrar(reg, probe) || wps_build_sel_reg_dev_password_id(reg, probe) || wps_build_sel_reg_config_methods(reg, probe) || wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : WPS_RESP_REGISTRAR) || wps_build_uuid_e(probe, reg->wps->uuid) || wps_build_device_attrs(®->wps->dev, probe) || wps_build_probe_config_methods(reg, probe) || (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) || wps_build_wfa_ext(probe, 0, auth_macs, count, 0) || wps_build_vendor_ext(®->wps->dev, probe) || wps_build_application_ext(®->wps->dev, probe)) { wpabuf_free(beacon); wpabuf_free(probe); return -1; } beacon = wps_ie_encapsulate(beacon); probe = wps_ie_encapsulate(probe); if (!beacon || !probe) { wpabuf_free(beacon); wpabuf_free(probe); return -1; } return wps_cb_set_ie(reg, beacon, probe); } static int wps_get_dev_password(struct wps_data *wps) { const u8 *pin; size_t pin_len = 0; bin_clear_free(wps->dev_password, wps->dev_password_len); wps->dev_password = NULL; if (wps->pbc) { wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); pin = (const u8 *) "00000000"; pin_len = 8; #ifdef CONFIG_WPS_NFC } else if (wps->nfc_pw_token) { if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { wpa_printf(MSG_DEBUG, "WPS: Using NFC connection " "handover and abbreviated WPS handshake " "without Device Password"); return 0; } wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " "Password Token"); pin = wps->nfc_pw_token->dev_pw; pin_len = wps->nfc_pw_token->dev_pw_len; } else if (wps->dev_pw_id >= 0x10 && wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && wps->wps->ap_nfc_dev_pw) { wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token"); pin = wpabuf_head(wps->wps->ap_nfc_dev_pw); pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw); #endif /* CONFIG_WPS_NFC */ } else { pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, &pin_len); if (pin && wps->dev_pw_id >= 0x10) { wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device " "Password ID, but PIN found"); /* * See whether Enrollee is willing to use PIN instead. */ wps->dev_pw_id = DEV_PW_DEFAULT; } } if (pin == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " "the Enrollee (context %p registrar %p)", wps->wps, wps->wps->registrar); wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, &wps->peer_dev); return -1; } wps->dev_password = os_memdup(pin, pin_len); if (wps->dev_password == NULL) return -1; wps->dev_password_len = pin_len; return 0; } static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) { wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); wpabuf_put_be16(msg, ATTR_UUID_R); wpabuf_put_be16(msg, WPS_UUID_LEN); wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); return 0; } static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) { u8 *hash; const u8 *addr[4]; size_t len[4]; if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) return -1; wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); wpa_hexdump(MSG_DEBUG, "WPS: R-S2", wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " "R-Hash derivation"); return -1; } wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); wpabuf_put_be16(msg, ATTR_R_HASH1); wpabuf_put_be16(msg, SHA256_MAC_LEN); hash = wpabuf_put(msg, SHA256_MAC_LEN); /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ addr[0] = wps->snonce; len[0] = WPS_SECRET_NONCE_LEN; addr[1] = wps->psk1; len[1] = WPS_PSK_LEN; addr[2] = wpabuf_head(wps->dh_pubkey_e); len[2] = wpabuf_len(wps->dh_pubkey_e); addr[3] = wpabuf_head(wps->dh_pubkey_r); len[3] = wpabuf_len(wps->dh_pubkey_r); hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); wpabuf_put_be16(msg, ATTR_R_HASH2); wpabuf_put_be16(msg, SHA256_MAC_LEN); hash = wpabuf_put(msg, SHA256_MAC_LEN); /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; addr[1] = wps->psk2; hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); return 0; } static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) { wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); wpabuf_put_be16(msg, ATTR_R_SNONCE1); wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); return 0; } static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) { wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); wpabuf_put_be16(msg, ATTR_R_SNONCE2); wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); return 0; } static int wps_build_cred_network_idx(struct wpabuf *msg, const struct wps_credential *cred) { wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); wpabuf_put_be16(msg, 1); wpabuf_put_u8(msg, 1); return 0; } static int wps_build_cred_ssid(struct wpabuf *msg, const struct wps_credential *cred) { wpa_printf(MSG_DEBUG, "WPS: * SSID"); wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", cred->ssid, cred->ssid_len); wpabuf_put_be16(msg, ATTR_SSID); wpabuf_put_be16(msg, cred->ssid_len); wpabuf_put_data(msg, cred->ssid, cred->ssid_len); return 0; } static int wps_build_cred_auth_type(struct wpabuf *msg, const struct wps_credential *cred) { wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", cred->auth_type); wpabuf_put_be16(msg, ATTR_AUTH_TYPE); wpabuf_put_be16(msg, 2); wpabuf_put_be16(msg, cred->auth_type); return 0; } static int wps_build_cred_encr_type(struct wpabuf *msg, const struct wps_credential *cred) { wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", cred->encr_type); wpabuf_put_be16(msg, ATTR_ENCR_TYPE); wpabuf_put_be16(msg, 2); wpabuf_put_be16(msg, cred->encr_type); return 0; } static int wps_build_cred_network_key(struct wpabuf *msg, const struct wps_credential *cred) { wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", (int) cred->key_len); wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", cred->key, cred->key_len); wpabuf_put_be16(msg, ATTR_NETWORK_KEY); wpabuf_put_be16(msg, cred->key_len); wpabuf_put_data(msg, cred->key, cred->key_len); return 0; } static int wps_build_credential(struct wpabuf *msg, const struct wps_credential *cred) { if (wps_build_cred_network_idx(msg, cred) || wps_build_cred_ssid(msg, cred) || wps_build_cred_auth_type(msg, cred) || wps_build_cred_encr_type(msg, cred) || wps_build_cred_network_key(msg, cred) || wps_build_mac_addr(msg, cred->mac_addr)) return -1; return 0; } int wps_build_credential_wrap(struct wpabuf *msg, const struct wps_credential *cred) { struct wpabuf *wbuf; wbuf = wpabuf_alloc(200); if (wbuf == NULL) return -1; if (wps_build_credential(wbuf, cred)) { wpabuf_clear_free(wbuf); return -1; } wpabuf_put_be16(msg, ATTR_CRED); wpabuf_put_be16(msg, wpabuf_len(wbuf)); wpabuf_put_buf(msg, wbuf); wpabuf_clear_free(wbuf); return 0; } int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) { struct wpabuf *cred; struct wps_registrar *reg = wps->wps->registrar; const u8 *pskfile_psk; char hex[65]; if (wps->wps->registrar->skip_cred_build) goto skip_cred_build; wpa_printf(MSG_DEBUG, "WPS: * Credential"); if (wps->use_cred) { os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); goto use_provided; } os_memset(&wps->cred, 0, sizeof(wps->cred)); if (wps->peer_dev.multi_ap_ext == MULTI_AP_BACKHAUL_STA && reg->multi_ap_backhaul_ssid_len) { wpa_printf(MSG_DEBUG, "WPS: Use backhaul STA credentials"); os_memcpy(wps->cred.ssid, reg->multi_ap_backhaul_ssid, reg->multi_ap_backhaul_ssid_len); wps->cred.ssid_len = reg->multi_ap_backhaul_ssid_len; /* Backhaul is always WPA2PSK */ wps->cred.auth_type = WPS_AUTH_WPA2PSK; wps->cred.encr_type = WPS_ENCR_AES; /* Set MAC address in the Credential to be the Enrollee's MAC * address */ os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); if (reg->multi_ap_backhaul_network_key) { os_memcpy(wps->cred.key, reg->multi_ap_backhaul_network_key, reg->multi_ap_backhaul_network_key_len); wps->cred.key_len = reg->multi_ap_backhaul_network_key_len; } goto use_provided; } os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); wps->cred.ssid_len = wps->wps->ssid_len; /* Select the best authentication and encryption type */ wpa_printf(MSG_DEBUG, "WPS: Own auth types 0x%x - masked Enrollee auth types 0x%x", wps->wps->auth_types, wps->auth_type); if (wps->auth_type & WPS_AUTH_WPA2PSK) wps->auth_type = WPS_AUTH_WPA2PSK; else if (wps->auth_type & WPS_AUTH_WPAPSK) wps->auth_type = WPS_AUTH_WPAPSK; else if (wps->auth_type & WPS_AUTH_OPEN) wps->auth_type = WPS_AUTH_OPEN; else { wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", wps->auth_type); return -1; } wps->cred.auth_type = wps->auth_type; wpa_printf(MSG_DEBUG, "WPS: Own encr types 0x%x (rsn: 0x%x, wpa: 0x%x) - masked Enrollee encr types 0x%x", wps->wps->encr_types, wps->wps->encr_types_rsn, wps->wps->encr_types_wpa, wps->encr_type); if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPA2PSK) wps->encr_type &= wps->wps->encr_types_rsn; else if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPAPSK) wps->encr_type &= wps->wps->encr_types_wpa; if (wps->auth_type == WPS_AUTH_WPA2PSK || wps->auth_type == WPS_AUTH_WPAPSK) { if (wps->encr_type & WPS_ENCR_AES) wps->encr_type = WPS_ENCR_AES; else if (wps->encr_type & WPS_ENCR_TKIP) wps->encr_type = WPS_ENCR_TKIP; else { wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " "type for WPA/WPA2"); return -1; } } else { if (wps->encr_type & WPS_ENCR_NONE) wps->encr_type = WPS_ENCR_NONE; #ifdef CONFIG_TESTING_OPTIONS else if (wps->encr_type & WPS_ENCR_WEP) wps->encr_type = WPS_ENCR_WEP; #endif /* CONFIG_TESTING_OPTIONS */ else { wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " "type for non-WPA/WPA2 mode"); return -1; } } wps->cred.encr_type = wps->encr_type; /* * Set MAC address in the Credential to be the Enrollee's MAC address */ os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { u8 r[16]; /* Generate a random passphrase */ if (random_pool_ready() != 1 || random_get_bytes(r, sizeof(r)) < 0) { wpa_printf(MSG_INFO, "WPS: Could not generate random PSK"); return -1; } os_free(wps->new_psk); wps->new_psk = (u8 *) base64_encode(r, sizeof(r), &wps->new_psk_len); if (wps->new_psk == NULL) return -1; wps->new_psk_len--; /* remove newline */ while (wps->new_psk_len && wps->new_psk[wps->new_psk_len - 1] == '=') wps->new_psk_len--; wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", wps->new_psk, wps->new_psk_len); os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); wps->cred.key_len = wps->new_psk_len; } else if (wps_cp_lookup_pskfile(reg, wps->mac_addr_e, &pskfile_psk)) { wpa_hexdump_key(MSG_DEBUG, "WPS: Use PSK from wpa_psk_file", pskfile_psk, PMK_LEN); wpa_snprintf_hex(hex, sizeof(hex), pskfile_psk, PMK_LEN); os_memcpy(wps->cred.key, hex, PMK_LEN * 2); wps->cred.key_len = PMK_LEN * 2; } else if (!wps->wps->registrar->force_per_enrollee_psk && wps->use_psk_key && wps->wps->psk_set) { wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, PMK_LEN); os_memcpy(wps->cred.key, hex, PMK_LEN * 2); wps->cred.key_len = PMK_LEN * 2; } else if (!wps->wps->registrar->force_per_enrollee_psk && wps->wps->network_key) { os_memcpy(wps->cred.key, wps->wps->network_key, wps->wps->network_key_len); wps->cred.key_len = wps->wps->network_key_len; } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { /* Generate a random per-device PSK */ os_free(wps->new_psk); wps->new_psk_len = PMK_LEN; wps->new_psk = os_malloc(wps->new_psk_len); if (wps->new_psk == NULL) return -1; if (random_pool_ready() != 1 || random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { wpa_printf(MSG_INFO, "WPS: Could not generate random PSK"); os_free(wps->new_psk); wps->new_psk = NULL; return -1; } wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", wps->new_psk, wps->new_psk_len); wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, wps->new_psk_len); os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); wps->cred.key_len = wps->new_psk_len * 2; } use_provided: #ifdef CONFIG_WPS_TESTING if (wps_testing_dummy_cred) cred = wpabuf_alloc(200); else cred = NULL; if (cred) { struct wps_credential dummy; wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); os_memset(&dummy, 0, sizeof(dummy)); os_memcpy(dummy.ssid, "dummy", 5); dummy.ssid_len = 5; dummy.auth_type = WPS_AUTH_WPA2PSK; dummy.encr_type = WPS_ENCR_AES; os_memcpy(dummy.key, "dummy psk", 9); dummy.key_len = 9; os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); wps_build_credential(cred, &dummy); wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); wpabuf_put_be16(msg, ATTR_CRED); wpabuf_put_be16(msg, wpabuf_len(cred)); wpabuf_put_buf(msg, cred); wpabuf_free(cred); } #endif /* CONFIG_WPS_TESTING */ cred = wpabuf_alloc(200); if (cred == NULL) return -1; if (wps_build_credential(cred, &wps->cred)) { wpabuf_clear_free(cred); return -1; } wpabuf_put_be16(msg, ATTR_CRED); wpabuf_put_be16(msg, wpabuf_len(cred)); wpabuf_put_buf(msg, cred); wpabuf_clear_free(cred); skip_cred_build: if (wps->wps->registrar->extra_cred) { wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); } return 0; } static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) { wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); if (wps_build_credential(msg, &wps->cred)) return -1; return 0; } static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) { struct wpabuf *msg, *plain; msg = wpabuf_alloc(1000); if (msg == NULL) return NULL; plain = wpabuf_alloc(200); if (plain == NULL) { wpabuf_free(msg); return NULL; } if (wps_build_ap_settings(wps, plain)) { wpabuf_clear_free(plain); wpabuf_free(msg); return NULL; } wpabuf_put_be16(msg, ATTR_CRED); wpabuf_put_be16(msg, wpabuf_len(plain)); wpabuf_put_buf(msg, plain); wpabuf_clear_free(plain); return msg; } static struct wpabuf * wps_build_m2(struct wps_data *wps) { struct wpabuf *msg; int config_in_m2 = 0; if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) return NULL; wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", wps->nonce_r, WPS_NONCE_LEN); wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); msg = wpabuf_alloc(1000); if (msg == NULL) return NULL; if (wps_build_version(msg) || wps_build_msg_type(msg, WPS_M2) || wps_build_enrollee_nonce(wps, msg) || wps_build_registrar_nonce(wps, msg) || wps_build_uuid_r(wps, msg) || wps_build_public_key(wps, msg) || wps_derive_keys(wps) || wps_build_auth_type_flags(wps, msg) || wps_build_encr_type_flags(wps, msg) || wps_build_conn_type_flags(wps, msg) || wps_build_config_methods_r(wps->wps->registrar, msg) || wps_build_device_attrs(&wps->wps->dev, msg) || wps_build_rf_bands(&wps->wps->dev, msg, wps->wps->rf_band_cb(wps->wps->cb_ctx)) || wps_build_assoc_state(wps, msg) || wps_build_config_error(msg, WPS_CFG_NO_ERROR) || wps_build_dev_password_id(msg, wps->dev_pw_id) || wps_build_os_version(&wps->wps->dev, msg) || wps_build_wfa_ext(msg, 0, NULL, 0, 0)) { wpabuf_free(msg); return NULL; } #ifdef CONFIG_WPS_NFC if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob && wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { /* * Use abbreviated handshake since public key hash allowed * Enrollee to validate our public key similarly to how Enrollee * public key was validated. There is no need to validate Device * Password in this case. */ struct wpabuf *plain = wpabuf_alloc(500); if (plain == NULL || wps_build_cred(wps, plain) || wps_build_key_wrap_auth(wps, plain) || wps_build_encr_settings(wps, msg, plain)) { wpabuf_free(msg); wpabuf_clear_free(plain); return NULL; } wpabuf_clear_free(plain); config_in_m2 = 1; } #endif /* CONFIG_WPS_NFC */ if (wps_build_authenticator(wps, msg)) { wpabuf_free(msg); return NULL; } wps->int_reg = 1; wps->state = config_in_m2 ? RECV_DONE : RECV_M3; return msg; } static struct wpabuf * wps_build_m2d(struct wps_data *wps) { struct wpabuf *msg; u16 err = wps->config_error; wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); msg = wpabuf_alloc(1000); if (msg == NULL) return NULL; if (wps->wps->ap && wps->wps->ap_setup_locked && err == WPS_CFG_NO_ERROR) err = WPS_CFG_SETUP_LOCKED; if (wps_build_version(msg) || wps_build_msg_type(msg, WPS_M2D) || wps_build_enrollee_nonce(wps, msg) || wps_build_registrar_nonce(wps, msg) || wps_build_uuid_r(wps, msg) || wps_build_auth_type_flags(wps, msg) || wps_build_encr_type_flags(wps, msg) || wps_build_conn_type_flags(wps, msg) || wps_build_config_methods_r(wps->wps->registrar, msg) || wps_build_device_attrs(&wps->wps->dev, msg) || wps_build_rf_bands(&wps->wps->dev, msg, wps->wps->rf_band_cb(wps->wps->cb_ctx)) || wps_build_assoc_state(wps, msg) || wps_build_config_error(msg, err) || wps_build_os_version(&wps->wps->dev, msg) || wps_build_wfa_ext(msg, 0, NULL, 0, 0)) { wpabuf_free(msg); return NULL; } wps->state = RECV_M2D_ACK; return msg; } static struct wpabuf * wps_build_m4(struct wps_data *wps) { struct wpabuf *msg, *plain; wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); if (wps_derive_psk(wps, wps->dev_password, wps->dev_password_len) < 0) return NULL; plain = wpabuf_alloc(200); if (plain == NULL) return NULL; msg = wpabuf_alloc(1000); if (msg == NULL) { wpabuf_free(plain); return NULL; } if (wps_build_version(msg) || wps_build_msg_type(msg, WPS_M4) || wps_build_enrollee_nonce(wps, msg) || wps_build_r_hash(wps, msg) || wps_build_r_snonce1(wps, plain) || wps_build_key_wrap_auth(wps, plain) || wps_build_encr_settings(wps, msg, plain) || wps_build_wfa_ext(msg, 0, NULL, 0, 0) || wps_build_authenticator(wps, msg)) { wpabuf_clear_free(plain); wpabuf_free(msg); return NULL; } wpabuf_clear_free(plain); wps->state = RECV_M5; return msg; } static struct wpabuf * wps_build_m6(struct wps_data *wps) { struct wpabuf *msg, *plain; wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); plain = wpabuf_alloc(200); if (plain == NULL) return NULL; msg = wpabuf_alloc(1000); if (msg == NULL) { wpabuf_free(plain); return NULL; } if (wps_build_version(msg) || wps_build_msg_type(msg, WPS_M6) || wps_build_enrollee_nonce(wps, msg) || wps_build_r_snonce2(wps, plain) || wps_build_key_wrap_auth(wps, plain) || wps_build_encr_settings(wps, msg, plain) || wps_build_wfa_ext(msg, 0, NULL, 0, 0) || wps_build_authenticator(wps, msg)) { wpabuf_clear_free(plain); wpabuf_free(msg); return NULL; } wpabuf_clear_free(plain); wps->wps_pin_revealed = 1; wps->state = RECV_M7; return msg; } static struct wpabuf * wps_build_m8(struct wps_data *wps) { struct wpabuf *msg, *plain; wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); plain = wpabuf_alloc(500); if (plain == NULL) return NULL; msg = wpabuf_alloc(1000); if (msg == NULL) { wpabuf_free(plain); return NULL; } if (wps_build_version(msg) || wps_build_msg_type(msg, WPS_M8) || wps_build_enrollee_nonce(wps, msg) || ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || wps_build_key_wrap_auth(wps, plain) || wps_build_encr_settings(wps, msg, plain) || wps_build_wfa_ext(msg, 0, NULL, 0, 0) || wps_build_authenticator(wps, msg)) { wpabuf_clear_free(plain); wpabuf_clear_free(msg); return NULL; } wpabuf_clear_free(plain); wps->state = RECV_DONE; return msg; } struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, enum wsc_op_code *op_code) { struct wpabuf *msg; #ifdef CONFIG_WPS_UPNP if (!wps->int_reg && wps->wps->wps_upnp) { struct upnp_pending_message *p, *prev = NULL; if (wps->ext_reg > 1) wps_registrar_free_pending_m2(wps->wps); p = wps->wps->upnp_msgs; /* TODO: check pending message MAC address */ while (p && p->next) { prev = p; p = p->next; } if (p) { wpa_printf(MSG_DEBUG, "WPS: Use pending message from " "UPnP"); if (prev) prev->next = NULL; else wps->wps->upnp_msgs = NULL; msg = p->msg; switch (p->type) { case WPS_WSC_ACK: *op_code = WSC_ACK; break; case WPS_WSC_NACK: *op_code = WSC_NACK; break; default: *op_code = WSC_MSG; break; } os_free(p); if (wps->ext_reg == 0) wps->ext_reg = 1; return msg; } } if (wps->ext_reg) { wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " "pending message available"); return NULL; } #endif /* CONFIG_WPS_UPNP */ switch (wps->state) { case SEND_M2: if (wps_get_dev_password(wps) < 0) msg = wps_build_m2d(wps); else msg = wps_build_m2(wps); *op_code = WSC_MSG; break; case SEND_M2D: msg = wps_build_m2d(wps); *op_code = WSC_MSG; break; case SEND_M4: msg = wps_build_m4(wps); *op_code = WSC_MSG; break; case SEND_M6: msg = wps_build_m6(wps); *op_code = WSC_MSG; break; case SEND_M8: msg = wps_build_m8(wps); *op_code = WSC_MSG; break; case RECV_DONE: msg = wps_build_wsc_ack(wps); *op_code = WSC_ACK; break; case SEND_WSC_NACK: msg = wps_build_wsc_nack(wps); *op_code = WSC_NACK; break; default: wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " "a message", wps->state); msg = NULL; break; } if (*op_code == WSC_MSG && msg) { /* Save a copy of the last message for Authenticator derivation */ wpabuf_free(wps->last_msg); wps->last_msg = wpabuf_dup(msg); } return msg; } static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) { if (e_nonce == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); return -1; } os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", wps->nonce_e, WPS_NONCE_LEN); return 0; } static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) { if (r_nonce == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); return -1; } if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); return -1; } return 0; } static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) { if (uuid_e == NULL) { wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); return -1; } os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); return 0; } static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) { if (pw_id == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); return -1; } wps->dev_pw_id = WPA_GET_BE16(pw_id); wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); return 0; } static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) { if (e_hash1 == NULL) { wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); return -1; } os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); return 0; } static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) { if (e_hash2 == NULL) { wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); return -1; } os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); return 0; } static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) { u8 hash[SHA256_MAC_LEN]; const u8 *addr[4]; size_t len[4]; if (e_snonce1 == NULL) { wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); return -1; } wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, WPS_SECRET_NONCE_LEN); /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ addr[0] = e_snonce1; len[0] = WPS_SECRET_NONCE_LEN; addr[1] = wps->psk1; len[1] = WPS_PSK_LEN; addr[2] = wpabuf_head(wps->dh_pubkey_e); len[2] = wpabuf_len(wps->dh_pubkey_e); addr[3] = wpabuf_head(wps->dh_pubkey_r); len[3] = wpabuf_len(wps->dh_pubkey_r); hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); if (os_memcmp_const(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " "not match with the pre-committed value"); wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e); return -1; } wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " "half of the device password"); return 0; } static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) { u8 hash[SHA256_MAC_LEN]; const u8 *addr[4]; size_t len[4]; if (e_snonce2 == NULL) { wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); return -1; } wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, WPS_SECRET_NONCE_LEN); /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ addr[0] = e_snonce2; len[0] = WPS_SECRET_NONCE_LEN; addr[1] = wps->psk2; len[1] = WPS_PSK_LEN; addr[2] = wpabuf_head(wps->dh_pubkey_e); len[2] = wpabuf_len(wps->dh_pubkey_e); addr[3] = wpabuf_head(wps->dh_pubkey_r); len[3] = wpabuf_len(wps->dh_pubkey_r); hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); if (os_memcmp_const(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " "not match with the pre-committed value"); wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e); return -1; } wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " "half of the device password"); wps->wps_pin_revealed = 0; wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); /* * In case wildcard PIN is used and WPS handshake succeeds in the first * attempt, wps_registrar_unlock_pin() would not free the PIN, so make * sure the PIN gets invalidated here. */ wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); return 0; } static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) { if (mac_addr == NULL) { wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); return -1; } wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, MAC2STR(mac_addr)); os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); return 0; } static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, size_t pk_len) { if (pk == NULL || pk_len == 0) { wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); return -1; } wpabuf_free(wps->dh_pubkey_e); wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); if (wps->dh_pubkey_e == NULL) return -1; return 0; } static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) { u16 auth_types; if (auth == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " "received"); return -1; } auth_types = WPA_GET_BE16(auth); wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", auth_types); #ifdef WPS_WORKAROUNDS /* * Some deployed implementations seem to advertise incorrect information * in this attribute. A value of 0x1b (WPA2 + WPA + WPAPSK + OPEN, but * no WPA2PSK) has been reported to be used. Add WPA2PSK to the list to * avoid issues with building Credentials that do not use the strongest * actually supported authentication option (that device does support * WPA2PSK even when it does not claim it here). */ if ((auth_types & (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK)) == (WPS_AUTH_WPA2 | WPS_AUTH_WPAPSK)) { wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee supports WPA2PSK based on claimed WPA2 support"); auth_types |= WPS_AUTH_WPA2PSK; } #endif /* WPS_WORKAROUNDS */ wps->auth_type = wps->wps->auth_types & auth_types; if (wps->auth_type == 0) { wpa_printf(MSG_DEBUG, "WPS: No match in supported " "authentication types (own 0x%x Enrollee 0x%x)", wps->wps->auth_types, auth_types); #ifdef WPS_WORKAROUNDS /* * Some deployed implementations seem to advertise incorrect * information in this attribute. For example, Linksys WRT350N * seems to have a byteorder bug that breaks this negotiation. * In order to interoperate with existing implementations, * assume that the Enrollee supports everything we do. */ wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " "does not advertise supported authentication types " "correctly"); wps->auth_type = wps->wps->auth_types; #else /* WPS_WORKAROUNDS */ return -1; #endif /* WPS_WORKAROUNDS */ } return 0; } static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) { u16 encr_types; if (encr == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " "received"); return -1; } encr_types = WPA_GET_BE16(encr); wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", encr_types); wps->encr_type = wps->wps->encr_types & encr_types; if (wps->encr_type == 0) { wpa_printf(MSG_DEBUG, "WPS: No match in supported " "encryption types (own 0x%x Enrollee 0x%x)", wps->wps->encr_types, encr_types); #ifdef WPS_WORKAROUNDS /* * Some deployed implementations seem to advertise incorrect * information in this attribute. For example, Linksys WRT350N * seems to have a byteorder bug that breaks this negotiation. * In order to interoperate with existing implementations, * assume that the Enrollee supports everything we do. */ wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " "does not advertise supported encryption types " "correctly"); wps->encr_type = wps->wps->encr_types; #else /* WPS_WORKAROUNDS */ return -1; #endif /* WPS_WORKAROUNDS */ } return 0; } static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) { if (conn == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " "received"); return -1; } wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", *conn); return 0; } static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) { u16 m; if (methods == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); return -1; } m = WPA_GET_BE16(methods); wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" "%s%s%s%s%s%s%s%s%s", m, m & WPS_CONFIG_USBA ? " [USBA]" : "", m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", m & WPS_CONFIG_LABEL ? " [Label]" : "", m & WPS_CONFIG_DISPLAY ? " [Display]" : "", m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { /* * The Enrollee does not have a display so it is unlikely to be * able to show the passphrase to a user and as such, could * benefit from receiving PSK to reduce key derivation time. */ wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " "Enrollee not supporting display"); wps->use_psk_key = 1; } return 0; } static int wps_process_wps_state(struct wps_data *wps, const u8 *state) { if (state == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " "received"); return -1; } wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", *state); return 0; } static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) { u16 a; if (assoc == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Association State received"); return -1; } a = WPA_GET_BE16(assoc); wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); return 0; } static int wps_process_config_error(struct wps_data *wps, const u8 *err) { u16 e; if (err == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); return -1; } e = WPA_GET_BE16(err); wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); return 0; } static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) { #ifdef CONFIG_P2P struct wps_registrar *reg = wps->wps->registrar; if (is_zero_ether_addr(reg->p2p_dev_addr)) return 1; /* no filtering in use */ if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " "filtering for PBC: expected " MACSTR " was " MACSTR " - indicate PBC session overlap", MAC2STR(reg->p2p_dev_addr), MAC2STR(wps->p2p_dev_addr)); return 0; } #endif /* CONFIG_P2P */ return 1; } static int wps_registrar_skip_overlap(struct wps_data *wps) { #ifdef CONFIG_P2P struct wps_registrar *reg = wps->wps->registrar; if (is_zero_ether_addr(reg->p2p_dev_addr)) return 0; /* no specific Enrollee selected */ if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " "Enrollee match"); return 1; } #endif /* CONFIG_P2P */ return 0; } static enum wps_process_res wps_process_m1(struct wps_data *wps, struct wps_parse_attr *attr) { wpa_printf(MSG_DEBUG, "WPS: Received M1"); if (wps->state != RECV_M1) { wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " "receiving M1", wps->state); return WPS_FAILURE; } if (wps_process_uuid_e(wps, attr->uuid_e) || wps_process_mac_addr(wps, attr->mac_addr) || wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || wps_process_auth_type_flags(wps, attr->auth_type_flags) || wps_process_encr_type_flags(wps, attr->encr_type_flags) || wps_process_conn_type_flags(wps, attr->conn_type_flags) || wps_process_config_methods(wps, attr->config_methods) || wps_process_wps_state(wps, attr->wps_state) || wps_process_device_attrs(&wps->peer_dev, attr) || wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || wps_process_assoc_state(wps, attr->assoc_state) || wps_process_dev_password_id(wps, attr->dev_password_id) || wps_process_config_error(wps, attr->config_error) || wps_process_os_version(&wps->peer_dev, attr->os_version)) return WPS_FAILURE; if (wps->dev_pw_id < 0x10 && wps->dev_pw_id != DEV_PW_DEFAULT && wps->dev_pw_id != DEV_PW_P2PS_DEFAULT && wps->dev_pw_id != DEV_PW_USER_SPECIFIED && wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && #ifdef CONFIG_WPS_NFC wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && #endif /* CONFIG_WPS_NFC */ (wps->dev_pw_id != DEV_PW_PUSHBUTTON || !wps->wps->registrar->pbc)) { wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", wps->dev_pw_id); wps->state = SEND_M2D; return WPS_CONTINUE; } #ifdef CONFIG_WPS_NFC if (wps->dev_pw_id >= 0x10 || wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { struct wps_nfc_pw_token *token; const u8 *addr[1]; u8 hash[WPS_HASH_LEN]; wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)", wps->dev_pw_id, wps->wps, wps->wps->registrar); token = wps_get_nfc_pw_token( &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); if (token && token->peer_pk_hash_known) { size_t len; wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " "Password Token"); dl_list_del(&token->list); wps->nfc_pw_token = token; addr[0] = attr->public_key; len = attr->public_key_len; sha256_vector(1, addr, &len, hash); if (os_memcmp_const(hash, wps->nfc_pw_token->pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN) != 0) { wpa_printf(MSG_ERROR, "WPS: Public Key hash " "mismatch"); wps->state = SEND_M2D; wps->config_error = WPS_CFG_PUBLIC_KEY_HASH_MISMATCH; return WPS_CONTINUE; } } else if (token) { wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " "Password Token (no peer PK hash)"); wps->nfc_pw_token = token; } else if (wps->dev_pw_id >= 0x10 && wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && wps->wps->ap_nfc_dev_pw) { wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token"); } } #endif /* CONFIG_WPS_NFC */ if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { if ((wps->wps->registrar->force_pbc_overlap || wps_registrar_pbc_overlap(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e) || !wps_registrar_p2p_dev_addr_match(wps)) && !wps_registrar_skip_overlap(wps)) { wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " "negotiation"); wps->state = SEND_M2D; wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; wps_pbc_overlap_event(wps->wps); wps_fail_event(wps->wps, WPS_M1, WPS_CFG_MULTIPLE_PBC_DETECTED, WPS_EI_NO_ERROR, wps->mac_addr_e); wps->wps->registrar->force_pbc_overlap = 1; return WPS_CONTINUE; } wps_registrar_add_pbc_session(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e); wps->pbc = 1; } #ifdef WPS_WORKAROUNDS /* * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in * passphrase format. To avoid interop issues, force PSK format to be * used. */ if (!wps->use_psk_key && wps->peer_dev.manufacturer && os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && wps->peer_dev.model_name && os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " "PSK format"); wps->use_psk_key = 1; } #endif /* WPS_WORKAROUNDS */ wps_process_vendor_ext_m1(&wps->peer_dev, attr->multi_ap_ext); wps->state = SEND_M2; return WPS_CONTINUE; } static enum wps_process_res wps_process_m3(struct wps_data *wps, const struct wpabuf *msg, struct wps_parse_attr *attr) { wpa_printf(MSG_DEBUG, "WPS: Received M3"); if (wps->state != RECV_M3) { wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " "receiving M3", wps->state); wps->state = SEND_WSC_NACK; return WPS_CONTINUE; } if (wps->pbc && wps->wps->registrar->force_pbc_overlap && !wps_registrar_skip_overlap(wps)) { wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " "session overlap"); wps->state = SEND_WSC_NACK; wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; return WPS_CONTINUE; } if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || wps_process_authenticator(wps, attr->authenticator, msg) || wps_process_e_hash1(wps, attr->e_hash1) || wps_process_e_hash2(wps, attr->e_hash2)) { wps->state = SEND_WSC_NACK; return WPS_CONTINUE; } wps->state = SEND_M4; return WPS_CONTINUE; } static enum wps_process_res wps_process_m5(struct wps_data *wps, const struct wpabuf *msg, struct wps_parse_attr *attr) { struct wpabuf *decrypted; struct wps_parse_attr eattr; wpa_printf(MSG_DEBUG, "WPS: Received M5"); if (wps->state != RECV_M5) { wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " "receiving M5", wps->state); wps->state = SEND_WSC_NACK; return WPS_CONTINUE; } if (wps->pbc && wps->wps->registrar->force_pbc_overlap && !wps_registrar_skip_overlap(wps)) { wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " "session overlap"); wps->state = SEND_WSC_NACK; wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; return WPS_CONTINUE; } if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || wps_process_authenticator(wps, attr->authenticator, msg)) { wps->state = SEND_WSC_NACK; return WPS_CONTINUE; } decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, attr->encr_settings_len); if (decrypted == NULL) { wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " "Settings attribute"); wps->state = SEND_WSC_NACK; return WPS_CONTINUE; } if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { wpabuf_clear_free(decrypted); wps->state = SEND_WSC_NACK; return WPS_CONTINUE; } wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " "attribute"); if (wps_parse_msg(decrypted, &eattr) < 0 || wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || wps_process_e_snonce1(wps, eattr.e_snonce1)) { wpabuf_clear_free(decrypted); wps->state = SEND_WSC_NACK; return WPS_CONTINUE; } wpabuf_clear_free(decrypted); wps->state = SEND_M6; return WPS_CONTINUE; } static void wps_sta_cred_cb(struct wps_data *wps) { /* * Update credential to only include a single authentication and * encryption type in case the AP configuration includes more than one * option. */ if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) wps->cred.auth_type = WPS_AUTH_WPA2PSK; else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) wps->cred.auth_type = WPS_AUTH_WPAPSK; if (wps->cred.encr_type & WPS_ENCR_AES) wps->cred.encr_type = WPS_ENCR_AES; else if (wps->cred.encr_type & WPS_ENCR_TKIP) wps->cred.encr_type = WPS_ENCR_TKIP; wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " "AP configuration"); if (wps->wps->cred_cb) wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); } static void wps_cred_update(struct wps_credential *dst, struct wps_credential *src) { os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); dst->ssid_len = src->ssid_len; dst->auth_type = src->auth_type; dst->encr_type = src->encr_type; dst->key_idx = src->key_idx; os_memcpy(dst->key, src->key, sizeof(dst->key)); dst->key_len = src->key_len; } static int wps_process_ap_settings_r(struct wps_data *wps, struct wps_parse_attr *attr) { struct wpabuf *msg; if (wps->wps->ap || wps->er) return 0; /* AP Settings Attributes in M7 when Enrollee is an AP */ if (wps_process_ap_settings(attr, &wps->cred) < 0) return -1; wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); if (wps->new_ap_settings) { wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " "new settings"); wps_cred_update(&wps->cred, wps->new_ap_settings); return 0; } else { /* * Use the AP PIN only to receive the current AP settings, not * to reconfigure the AP. */ /* * Clear selected registrar here since we do not get to * WSC_Done in this protocol run. */ wps_registrar_pin_completed(wps->wps->registrar); msg = wps_build_ap_cred(wps); if (msg == NULL) return -1; wps->cred.cred_attr = wpabuf_head(msg); wps->cred.cred_attr_len = wpabuf_len(msg); if (wps->ap_settings_cb) { wps->ap_settings_cb(wps->ap_settings_cb_ctx, &wps->cred); wpabuf_free(msg); return 1; } wps_sta_cred_cb(wps); wps->cred.cred_attr = NULL; wps->cred.cred_attr_len = 0; wpabuf_free(msg); return 1; } } static enum wps_process_res wps_process_m7(struct wps_data *wps, const struct wpabuf *msg, struct wps_parse_attr *attr) { struct wpabuf *decrypted; struct wps_parse_attr eattr; wpa_printf(MSG_DEBUG, "WPS: Received M7"); if (wps->state != RECV_M7) { wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " "receiving M7", wps->state); wps->state = SEND_WSC_NACK; return WPS_CONTINUE; } if (wps->pbc && wps->wps->registrar->force_pbc_overlap && !wps_registrar_skip_overlap(wps)) { wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " "session overlap"); wps->state = SEND_WSC_NACK; wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; return WPS_CONTINUE; } if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || wps_process_authenticator(wps, attr->authenticator, msg)) { wps->state = SEND_WSC_NACK; return WPS_CONTINUE; } decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, attr->encr_settings_len); if (decrypted == NULL) { wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " "Settings attribute"); wps->state = SEND_WSC_NACK; return WPS_CONTINUE; } if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, attr->version2 != NULL) < 0) { wpabuf_clear_free(decrypted); wps->state = SEND_WSC_NACK; return WPS_CONTINUE; } wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " "attribute"); if (wps_parse_msg(decrypted, &eattr) < 0 || wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || wps_process_e_snonce2(wps, eattr.e_snonce2) || wps_process_ap_settings_r(wps, &eattr)) { wpabuf_clear_free(decrypted); wps->state = SEND_WSC_NACK; return WPS_CONTINUE; } wpabuf_clear_free(decrypted); wps->state = SEND_M8; return WPS_CONTINUE; } static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, const struct wpabuf *msg) { struct wps_parse_attr attr; enum wps_process_res ret = WPS_CONTINUE; wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); if (wps_parse_msg(msg, &attr) < 0) return WPS_FAILURE; if (attr.msg_type == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); wps->state = SEND_WSC_NACK; return WPS_CONTINUE; } if (*attr.msg_type != WPS_M1 && (attr.registrar_nonce == NULL || os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)) { wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); return WPS_FAILURE; } switch (*attr.msg_type) { case WPS_M1: if (wps_validate_m1(msg) < 0) return WPS_FAILURE; #ifdef CONFIG_WPS_UPNP if (wps->wps->wps_upnp && attr.mac_addr) { /* Remove old pending messages when starting new run */ wps_free_pending_msgs(wps->wps->upnp_msgs); wps->wps->upnp_msgs = NULL; upnp_wps_device_send_wlan_event( wps->wps->wps_upnp, attr.mac_addr, UPNP_WPS_WLANEVENT_TYPE_EAP, msg); } #endif /* CONFIG_WPS_UPNP */ ret = wps_process_m1(wps, &attr); break; case WPS_M3: if (wps_validate_m3(msg) < 0) return WPS_FAILURE; ret = wps_process_m3(wps, msg, &attr); if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) wps_fail_event(wps->wps, WPS_M3, wps->config_error, wps->error_indication, wps->mac_addr_e); break; case WPS_M5: if (wps_validate_m5(msg) < 0) return WPS_FAILURE; ret = wps_process_m5(wps, msg, &attr); if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) wps_fail_event(wps->wps, WPS_M5, wps->config_error, wps->error_indication, wps->mac_addr_e); break; case WPS_M7: if (wps_validate_m7(msg) < 0) return WPS_FAILURE; ret = wps_process_m7(wps, msg, &attr); if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) wps_fail_event(wps->wps, WPS_M7, wps->config_error, wps->error_indication, wps->mac_addr_e); break; default: wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", *attr.msg_type); return WPS_FAILURE; } if (ret == WPS_CONTINUE) { /* Save a copy of the last message for Authenticator derivation */ wpabuf_free(wps->last_msg); wps->last_msg = wpabuf_dup(msg); } return ret; } static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, const struct wpabuf *msg) { struct wps_parse_attr attr; wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); if (wps_parse_msg(msg, &attr) < 0) return WPS_FAILURE; if (attr.msg_type == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); return WPS_FAILURE; } if (*attr.msg_type != WPS_WSC_ACK) { wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", *attr.msg_type); return WPS_FAILURE; } #ifdef CONFIG_WPS_UPNP if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && upnp_wps_subscribers(wps->wps->wps_upnp)) { if (wps->wps->upnp_msgs) return WPS_CONTINUE; wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " "external Registrar"); return WPS_PENDING; } #endif /* CONFIG_WPS_UPNP */ if (attr.registrar_nonce == NULL || os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) { wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); return WPS_FAILURE; } if (attr.enrollee_nonce == NULL || os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); return WPS_FAILURE; } if (wps->state == RECV_M2D_ACK) { #ifdef CONFIG_WPS_UPNP if (wps->wps->wps_upnp && upnp_wps_subscribers(wps->wps->wps_upnp)) { if (wps->wps->upnp_msgs) return WPS_CONTINUE; if (wps->ext_reg == 0) wps->ext_reg = 1; wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " "external Registrar"); return WPS_PENDING; } #endif /* CONFIG_WPS_UPNP */ wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " "terminate negotiation"); } return WPS_FAILURE; } static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, const struct wpabuf *msg) { struct wps_parse_attr attr; int old_state; u16 config_error; wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); old_state = wps->state; wps->state = SEND_WSC_NACK; if (wps_parse_msg(msg, &attr) < 0) return WPS_FAILURE; if (attr.msg_type == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); return WPS_FAILURE; } if (*attr.msg_type != WPS_WSC_NACK) { wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", *attr.msg_type); return WPS_FAILURE; } #ifdef CONFIG_WPS_UPNP if (wps->wps->wps_upnp && wps->ext_reg) { wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " "Registrar terminated by the Enrollee"); return WPS_FAILURE; } #endif /* CONFIG_WPS_UPNP */ if (attr.registrar_nonce == NULL || os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) { wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); return WPS_FAILURE; } if (attr.enrollee_nonce == NULL || os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); return WPS_FAILURE; } if (attr.config_error == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " "in WSC_NACK"); return WPS_FAILURE; } config_error = WPA_GET_BE16(attr.config_error); wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " "Configuration Error %d", config_error); switch (old_state) { case RECV_M3: wps_fail_event(wps->wps, WPS_M2, config_error, wps->error_indication, wps->mac_addr_e); break; case RECV_M5: wps_fail_event(wps->wps, WPS_M4, config_error, wps->error_indication, wps->mac_addr_e); break; case RECV_M7: wps_fail_event(wps->wps, WPS_M6, config_error, wps->error_indication, wps->mac_addr_e); break; case RECV_DONE: wps_fail_event(wps->wps, WPS_M8, config_error, wps->error_indication, wps->mac_addr_e); break; default: break; } return WPS_FAILURE; } static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, const struct wpabuf *msg) { struct wps_parse_attr attr; wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); if (wps->state != RECV_DONE && (!wps->wps->wps_upnp || !wps->ext_reg)) { wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " "receiving WSC_Done", wps->state); return WPS_FAILURE; } if (wps_parse_msg(msg, &attr) < 0) return WPS_FAILURE; if (attr.msg_type == NULL) { wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); return WPS_FAILURE; } if (*attr.msg_type != WPS_WSC_DONE) { wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", *attr.msg_type); return WPS_FAILURE; } #ifdef CONFIG_WPS_UPNP if (wps->wps->wps_upnp && wps->ext_reg) { wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " "Registrar completed successfully"); wps_device_store(wps->wps->registrar, &wps->peer_dev, wps->uuid_e); return WPS_DONE; } #endif /* CONFIG_WPS_UPNP */ if (attr.registrar_nonce == NULL || os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) { wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); return WPS_FAILURE; } if (attr.enrollee_nonce == NULL || os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); return WPS_FAILURE; } wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); wps_device_store(wps->wps->registrar, &wps->peer_dev, wps->uuid_e); if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { struct wps_credential cred; wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " "on first Enrollee connection"); os_memset(&cred, 0, sizeof(cred)); os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); cred.ssid_len = wps->wps->ssid_len; if (wps->wps->rf_band_cb(wps->wps->cb_ctx) == WPS_RF_60GHZ) { cred.auth_type = WPS_AUTH_WPA2PSK; cred.encr_type = WPS_ENCR_AES; } else { cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; } os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); cred.key_len = wps->new_psk_len; wps->wps->wps_state = WPS_STATE_CONFIGURED; wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated random passphrase", wps->new_psk, wps->new_psk_len); if (wps->wps->cred_cb) wps->wps->cred_cb(wps->wps->cb_ctx, &cred); os_free(wps->new_psk); wps->new_psk = NULL; } if (!wps->wps->ap && !wps->er) wps_sta_cred_cb(wps); if (wps->new_psk) { if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, wps->p2p_dev_addr, wps->new_psk, wps->new_psk_len)) { wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " "new PSK"); } os_free(wps->new_psk); wps->new_psk = NULL; } wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, wps->dev_password, wps->dev_password_len); if (wps->pbc) { wps_registrar_remove_pbc_session(wps->wps->registrar, wps->uuid_e, wps->p2p_dev_addr); wps_registrar_pbc_completed(wps->wps->registrar); #ifdef WPS_WORKAROUNDS os_get_reltime(&wps->wps->registrar->pbc_ignore_start); #endif /* WPS_WORKAROUNDS */ os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, WPS_UUID_LEN); } else { wps_registrar_pin_completed(wps->wps->registrar); } /* TODO: maintain AuthorizedMACs somewhere separately for each ER and * merge them into APs own list.. */ wps_success_event(wps->wps, wps->mac_addr_e); return WPS_DONE; } enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, enum wsc_op_code op_code, const struct wpabuf *msg) { enum wps_process_res ret; wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " "op_code=%d)", (unsigned long) wpabuf_len(msg), op_code); #ifdef CONFIG_WPS_UPNP if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { struct wps_parse_attr attr; if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && *attr.msg_type == WPS_M3) wps->ext_reg = 2; /* past M2/M2D phase */ } if (wps->ext_reg > 1) wps_registrar_free_pending_m2(wps->wps); if (wps->wps->wps_upnp && wps->ext_reg && wps->wps->upnp_msgs == NULL && (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) { struct wps_parse_attr attr; int type; if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) type = -1; else type = *attr.msg_type; wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" " to external Registrar for processing", type); upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, wps->mac_addr_e, UPNP_WPS_WLANEVENT_TYPE_EAP, msg); if (op_code == WSC_MSG) return WPS_PENDING; } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " "external Registrar"); return WPS_CONTINUE; } #endif /* CONFIG_WPS_UPNP */ switch (op_code) { case WSC_MSG: return wps_process_wsc_msg(wps, msg); case WSC_ACK: if (wps_validate_wsc_ack(msg) < 0) return WPS_FAILURE; return wps_process_wsc_ack(wps, msg); case WSC_NACK: if (wps_validate_wsc_nack(msg) < 0) return WPS_FAILURE; return wps_process_wsc_nack(wps, msg); case WSC_Done: if (wps_validate_wsc_done(msg) < 0) return WPS_FAILURE; ret = wps_process_wsc_done(wps, msg); if (ret == WPS_FAILURE) { wps->state = SEND_WSC_NACK; wps_fail_event(wps->wps, WPS_WSC_DONE, wps->config_error, wps->error_indication, wps->mac_addr_e); } return ret; default: wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); return WPS_FAILURE; } } int wps_registrar_update_ie(struct wps_registrar *reg) { return wps_set_ie(reg); } static void wps_registrar_set_selected_timeout(void *eloop_ctx, void *timeout_ctx) { struct wps_registrar *reg = eloop_ctx; wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " "unselect internal Registrar"); reg->selected_registrar = 0; reg->pbc = 0; wps_registrar_expire_pins(reg); wps_registrar_selected_registrar_changed(reg, 0); } #ifdef CONFIG_WPS_UPNP static void wps_registrar_sel_reg_add(struct wps_registrar *reg, struct subscription *s) { int i, j; wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " "config_methods=0x%x)", s->dev_password_id, s->config_methods); reg->sel_reg_union = 1; if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) reg->sel_reg_dev_password_id_override = s->dev_password_id; if (reg->sel_reg_config_methods_override == -1) reg->sel_reg_config_methods_override = 0; reg->sel_reg_config_methods_override |= s->config_methods; for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) if (is_zero_ether_addr(reg->authorized_macs_union[i])) break; for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; j++) { if (is_zero_ether_addr(s->authorized_macs[j])) break; wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " MACSTR, MAC2STR(s->authorized_macs[j])); os_memcpy(reg->authorized_macs_union[i], s->authorized_macs[j], ETH_ALEN); i++; } wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", (u8 *) reg->authorized_macs_union, sizeof(reg->authorized_macs_union)); } #endif /* CONFIG_WPS_UPNP */ static void wps_registrar_sel_reg_union(struct wps_registrar *reg) { #ifdef CONFIG_WPS_UPNP struct subscription *s; if (reg->wps->wps_upnp == NULL) return; dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, struct subscription, list) { struct subscr_addr *sa; sa = dl_list_first(&s->addr_list, struct subscr_addr, list); if (sa) { wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", inet_ntoa(sa->saddr.sin_addr), ntohs(sa->saddr.sin_port)); } if (s->selected_registrar) wps_registrar_sel_reg_add(reg, s); else wpa_printf(MSG_DEBUG, "WPS: External Registrar not " "selected"); } #endif /* CONFIG_WPS_UPNP */ } /** * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change * @reg: Registrar data from wps_registrar_init() * * This function is called when selected registrar state changes, e.g., when an * AP receives a SetSelectedRegistrar UPnP message. */ void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, u16 dev_pw_id) { wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); reg->sel_reg_union = reg->selected_registrar; reg->sel_reg_dev_password_id_override = -1; reg->sel_reg_config_methods_override = -1; os_memcpy(reg->authorized_macs_union, reg->authorized_macs, WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", (u8 *) reg->authorized_macs_union, sizeof(reg->authorized_macs_union)); if (reg->selected_registrar) { u16 methods; methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | WPS_CONFIG_PHY_PUSHBUTTON); if (reg->pbc) { reg->sel_reg_dev_password_id_override = DEV_PW_PUSHBUTTON; wps_set_pushbutton(&methods, reg->wps->config_methods); } else if (dev_pw_id) reg->sel_reg_dev_password_id_override = dev_pw_id; wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " "(pbc=%d)", reg->pbc); reg->sel_reg_config_methods_override = methods; } else wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); wps_registrar_sel_reg_union(reg); wps_set_ie(reg); wps_cb_set_sel_reg(reg); } int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, char *buf, size_t buflen) { struct wps_registrar_device *d; int len = 0, ret; char uuid[40]; char devtype[WPS_DEV_TYPE_BUFSIZE]; d = wps_device_get(reg, addr); if (d == NULL) return 0; if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) return 0; ret = os_snprintf(buf + len, buflen - len, "wpsUuid=%s\n" "wpsPrimaryDeviceType=%s\n" "wpsDeviceName=%s\n" "wpsManufacturer=%s\n" "wpsModelName=%s\n" "wpsModelNumber=%s\n" "wpsSerialNumber=%s\n", uuid, wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, sizeof(devtype)), d->dev.device_name ? d->dev.device_name : "", d->dev.manufacturer ? d->dev.manufacturer : "", d->dev.model_name ? d->dev.model_name : "", d->dev.model_number ? d->dev.model_number : "", d->dev.serial_number ? d->dev.serial_number : ""); if (os_snprintf_error(buflen - len, ret)) return len; len += ret; return len; } int wps_registrar_config_ap(struct wps_registrar *reg, struct wps_credential *cred) { wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type); if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | WPS_ENCR_AES))) { if (cred->encr_type & WPS_ENCR_WEP) { wpa_printf(MSG_INFO, "WPS: Reject new AP settings " "due to WEP configuration"); return -1; } wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " "invalid encr_type 0x%x", cred->encr_type); return -1; } if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == WPS_ENCR_TKIP) { wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " "TKIP+AES"); cred->encr_type |= WPS_ENCR_AES; } if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == WPS_AUTH_WPAPSK) { wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " "WPAPSK+WPA2PSK"); cred->auth_type |= WPS_AUTH_WPA2PSK; } if (reg->wps->cred_cb) return reg->wps->cred_cb(reg->wps->cb_ctx, cred); return -1; } #ifdef CONFIG_WPS_NFC int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, const u8 *pubkey_hash, u16 pw_id, const u8 *dev_pw, size_t dev_pw_len, int pk_hash_provided_oob) { struct wps_nfc_pw_token *token; if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) return -1; if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER && (pubkey_hash == NULL || !pk_hash_provided_oob)) { wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token " "addition - missing public key hash"); return -1; } wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); token = os_zalloc(sizeof(*token)); if (token == NULL) return -1; token->peer_pk_hash_known = pubkey_hash != NULL; if (pubkey_hash) os_memcpy(token->pubkey_hash, pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN); token->pw_id = pw_id; token->pk_hash_provided_oob = pk_hash_provided_oob; if (dev_pw) { wpa_snprintf_hex_uppercase((char *) token->dev_pw, sizeof(token->dev_pw), dev_pw, dev_pw_len); token->dev_pw_len = dev_pw_len * 2; } dl_list_add(®->nfc_pw_tokens, &token->list); reg->selected_registrar = 1; reg->pbc = 0; wps_registrar_add_authorized_mac(reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); wps_registrar_selected_registrar_changed(reg, pw_id); eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_set_selected_timeout, reg, NULL); wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", pw_id); return 0; } int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, const u8 *oob_dev_pw, size_t oob_dev_pw_len) { const u8 *pos, *hash, *dev_pw; u16 id; size_t dev_pw_len; if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 || oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + WPS_OOB_DEVICE_PASSWORD_LEN) return -1; hash = oob_dev_pw; pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; id = WPA_GET_BE16(pos); dev_pw = pos + 2; dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", id); wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", hash, WPS_OOB_PUBKEY_HASH_LEN); wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, dev_pw_len, 0); } void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, struct wps_nfc_pw_token *token) { wps_registrar_remove_authorized_mac(reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); wps_registrar_selected_registrar_changed(reg, 0); /* * Free the NFC password token if it was used only for a single protocol * run. The static handover case uses the same password token multiple * times, so do not free that case here. */ if (token->peer_pk_hash_known) os_free(token); } #endif /* CONFIG_WPS_NFC */