/*
* Wi-Fi Protected Setup - Registrar
- * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2008-2009, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
#include "wps_dev_attr.h"
#include "wps_upnp.h"
#include "crypto.h"
+#include "uuid.h"
+#define WPS_WORKAROUNDS
struct wps_uuid_pin {
struct wps_uuid_pin *next;
int wildcard_uuid;
u8 *pin;
size_t pin_len;
- int locked;
+#define PIN_LOCKED BIT(0)
+#define PIN_EXPIRES BIT(1)
+ int flags;
+ struct os_time expiration;
};
}
+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;
const struct wps_device_data *dev);
void (*reg_success_cb)(void *ctx, const u8 *mac_addr,
const u8 *uuid_e);
+ void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id,
+ u16 sel_reg_config_methods);
void *cb_ctx;
struct wps_uuid_pin *pins;
int sel_reg_dev_password_id_override;
int sel_reg_config_methods_override;
int static_wep_only;
+
+ struct wps_registrar_device *devices;
+
+ int force_pbc_overlap;
};
static int wps_set_ie(struct wps_registrar *reg);
+static void wps_cb_set_sel_reg(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_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);
+ dst->categ = src->categ;
+ dst->oui = src->oui;
+ dst->sub_categ = src->sub_categ;
+
+#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)
{
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->cb_ctx = cfg->cb_ctx;
reg->skip_cred_build = cfg->skip_cred_build;
if (cfg->extra_cred) {
wps_free_pins(reg->pins);
wps_free_pbc_sessions(reg->pbc_sessions);
wpabuf_free(reg->extra_cred);
+ wps_free_devices(reg->devices);
os_free(reg);
}
* @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 *uuid,
- const u8 *pin, size_t pin_len)
+ const u8 *pin, size_t pin_len, int timeout)
{
struct wps_uuid_pin *p;
os_memcpy(p->pin, pin, pin_len);
p->pin_len = pin_len;
+ if (timeout) {
+ p->flags |= PIN_EXPIRES;
+ os_get_time(&p->expiration);
+ p->expiration.sec += timeout;
+ }
+
p->next = reg->pins;
reg->pins = p;
- wpa_printf(MSG_DEBUG, "WPS: A new PIN configured");
+ 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;
wps_set_ie(reg);
+ wps_cb_set_sel_reg(reg);
+ 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_expire_pins(struct wps_registrar *reg)
+{
+ struct wps_uuid_pin *pin, *prev, *del;
+ struct os_time now;
+
+ os_get_time(&now);
+ prev = NULL;
+ pin = reg->pins;
+ while (pin) {
+ if ((pin->flags & PIN_EXPIRES) &&
+ os_time_before(&pin->expiration, &now)) {
+ if (prev == NULL)
+ reg->pins = pin->next;
+ else
+ prev->next = pin->next;
+ del = pin;
+ pin = pin->next;
+ wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
+ del->uuid, WPS_UUID_LEN);
+ wps_free_pin(del);
+ continue;
+ }
+ prev = pin;
+ pin = pin->next;
+ }
+}
+
+
/**
* wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
* @reg: Registrar data from wps_registrar_init()
{
struct wps_uuid_pin *pin;
+ wps_registrar_expire_pins(reg);
+
pin = reg->pins;
while (pin) {
if (!pin->wildcard_uuid &&
* Lock the PIN to avoid attacks based on concurrent re-use of the PIN
* that could otherwise avoid PIN invalidations.
*/
- if (pin->locked) {
+ if (pin->flags & PIN_LOCKED) {
wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
"allow concurrent re-use");
return NULL;
}
*pin_len = pin->pin_len;
- pin->locked = 1;
+ pin->flags |= PIN_LOCKED;
return pin->pin;
}
"wildcard PIN");
return wps_registrar_invalidate_pin(reg, uuid);
}
- pin->locked = 0;
+ pin->flags &= ~PIN_LOCKED;
return 0;
}
pin = pin->next;
reg->selected_registrar = 0;
reg->pbc = 0;
wps_set_ie(reg);
+ wps_cb_set_sel_reg(reg);
}
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);
}
if (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 -1;
}
wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
+ reg->force_pbc_overlap = 0;
reg->selected_registrar = 1;
reg->pbc = 1;
wps_set_ie(reg);
+ wps_cb_set_sel_reg(reg);
eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
wps_registrar_stop_pbc(reg);
}
+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_set_ie(reg);
+ wps_cb_set_sel_reg(reg);
+}
+
/**
* wps_registrar_probe_req_rx - Notify Registrar of Probe Request
MACSTR, MAC2STR(addr));
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);
+ }
}
}
+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;
+ if (reg->pbc)
+ methods |= WPS_CONFIG_PUSHBUTTON;
+ }
+
+ reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
+ reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
+ methods);
+}
+
+
/* Encapsulate WPS IE data with one (or more, if needed) IE headers */
static struct wpabuf * wps_ie_encapsulate(struct wpabuf *data)
{
static struct wpabuf * wps_build_m2d(struct wps_data *wps)
{
struct wpabuf *msg;
- u16 err = WPS_CFG_NO_ERROR;
+ 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)
+ if (wps->wps->ap && wps->wps->ap_setup_locked &&
+ err == WPS_CFG_NO_ERROR)
err = WPS_CFG_SETUP_LOCKED;
if (wps_build_version(msg) ||
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;
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");
+ "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;
#endif /* CONFIG_WPS_OOB */
if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
- if (wps_registrar_pbc_overlap(wps->wps->registrar,
+ if (wps->wps->registrar->force_pbc_overlap ||
+ wps_registrar_pbc_overlap(wps->wps->registrar,
wps->mac_addr_e, wps->uuid_e)) {
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->wps->registrar->force_pbc_overlap = 1;
return WPS_CONTINUE;
}
wps_registrar_add_pbc_session(wps->wps->registrar,
return WPS_CONTINUE;
}
+ if (wps->pbc && wps->wps->registrar->force_pbc_overlap) {
+ 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) ||
return WPS_CONTINUE;
}
+ if (wps->pbc && wps->wps->registrar->force_pbc_overlap) {
+ 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;
}
+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)
{
wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
- /*
- * TODO: Provide access to AP settings and allow changes before sending
- * out M8. For now, just copy the settings unchanged into M8.
- */
-
- return 0;
+ 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.
+ */
+ wps_sta_cred_cb(wps);
+ return 1;
+ }
}
return WPS_CONTINUE;
}
+ if (wps->pbc && wps->wps->registrar->force_pbc_overlap) {
+ 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;
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 */
}
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) {
wps->new_psk = NULL;
}
- if (!wps->wps->ap) {
- wpa_printf(MSG_DEBUG, "WPS: Update local configuration based "
- "on the modified AP configuration");
- if (wps->wps->cred_cb)
- wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
- }
+ if (!wps->wps->ap)
+ wps_sta_cred_cb(wps);
if (wps->new_psk) {
if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
wps_registrar_remove_pbc_session(wps->wps->registrar,
wps->mac_addr_e, wps->uuid_e);
wps_registrar_pbc_completed(wps->wps->registrar);
+ } else {
+ wps_registrar_pin_completed(wps->wps->registrar);
}
wps_success_event(wps->wps);
reg->sel_reg_dev_password_id_override = -1;
reg->sel_reg_config_methods_override = -1;
wps_set_ie(reg);
+ wps_cb_set_sel_reg(reg);
}
reg, NULL);
return 0;
}
+
+
+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];
+
+ 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=%u-%08X-%u\n"
+ "wpsDeviceName=%s\n"
+ "wpsManufacturer=%s\n"
+ "wpsModelName=%s\n"
+ "wpsModelNumber=%s\n"
+ "wpsSerialNumber=%s\n",
+ uuid,
+ d->dev.categ, d->dev.oui, d->dev.sub_categ,
+ 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 (ret < 0 || (size_t) ret >= buflen - len)
+ return len;
+ len += ret;
+
+ return len;
+}
projects / libeap.git / blobdiff