#include "includes.h"
#include "common.h"
-#include "dh_groups.h"
+#include "dh_group5.h"
#include "sha256.h"
#include "aes_wrap.h"
#include "crypto.h"
-#include "ieee802_11_defs.h"
#include "wps_i.h"
#include "wps_dev_attr.h"
}
-struct wpabuf * wps_build_assoc_req_ie(void)
-{
- struct wpabuf *ie;
- u8 *len;
-
- wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for (Re)Association "
- "Request");
- ie = wpabuf_alloc(100);
- if (ie == NULL)
- return NULL;
-
- wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
- len = wpabuf_put(ie, 1);
- wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
-
- if (wps_build_version(ie) ||
- wps_build_req_type(ie, WPS_REQ_ENROLLEE)) {
- wpabuf_free(ie);
- return NULL;
- }
-
- *len = wpabuf_len(ie) - 2;
-
- return ie;
-}
-
-
-struct wpabuf * wps_build_probe_req_ie(int pbc, struct wps_device_data *dev,
- const u8 *uuid)
-{
- struct wpabuf *ie;
- u8 *len;
- u16 methods;
-
- wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for Probe Request");
-
- ie = wpabuf_alloc(200);
- if (ie == NULL)
- return NULL;
-
- wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
- len = wpabuf_put(ie, 1);
- wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
-
- if (pbc)
- methods = WPS_CONFIG_PUSHBUTTON;
- else
- methods = WPS_CONFIG_LABEL | WPS_CONFIG_DISPLAY |
- WPS_CONFIG_KEYPAD;
-
- if (wps_build_version(ie) ||
- wps_build_req_type(ie, WPS_REQ_ENROLLEE) ||
- wps_build_config_methods(ie, methods) ||
- wps_build_uuid_e(ie, uuid) ||
- wps_build_primary_dev_type(dev, ie) ||
- wps_build_rf_bands(dev, ie) ||
- wps_build_assoc_state(NULL, ie) ||
- wps_build_config_error(ie, WPS_CFG_NO_ERROR) ||
- wps_build_dev_password_id(ie, pbc ? DEV_PW_PUSHBUTTON :
- DEV_PW_DEFAULT)) {
- wpabuf_free(ie);
- return NULL;
- }
-
- *len = wpabuf_len(ie) - 2;
-
- return ie;
-}
-
-
int wps_derive_keys(struct wps_data *wps)
{
struct wpabuf *pubkey, *dh_shared;
return -1;
}
- dh_shared = dh_derive_shared(pubkey, wps->dh_privkey,
- dh_groups_get(WPS_DH_GROUP));
+ dh_shared = dh5_derive_shared(wps->dh_ctx, pubkey, wps->dh_privkey);
+ dh5_free(wps->dh_ctx);
+ wps->dh_ctx = NULL;
+ dh_shared = wpabuf_zeropad(dh_shared, 192);
if (dh_shared == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Failed to derive DH shared key");
return -1;
}
-int wps_derive_mgmt_keys(struct wps_data *wps)
-{
- u8 nonces[2 * WPS_NONCE_LEN];
- u8 keys[WPS_MGMTAUTHKEY_LEN + WPS_MGMTENCKEY_LEN];
- u8 hash[SHA256_MAC_LEN];
- const u8 *addr[2];
- size_t len[2];
- const char *auth_label = "WFA-WLAN-Management-MgmtAuthKey";
- const char *enc_label = "WFA-WLAN-Management-MgmtEncKey";
-
- /* MgmtAuthKey || MgmtEncKey =
- * kdf(EMSK, N1 || N2 || "WFA-WLAN-Management-Keys", 384) */
- os_memcpy(nonces, wps->nonce_e, WPS_NONCE_LEN);
- os_memcpy(nonces + WPS_NONCE_LEN, wps->nonce_r, WPS_NONCE_LEN);
- wps_kdf(wps->emsk, nonces, sizeof(nonces), "WFA-WLAN-Management-Keys",
- keys, sizeof(keys));
- os_memcpy(wps->mgmt_auth_key, keys, WPS_MGMTAUTHKEY_LEN);
- os_memcpy(wps->mgmt_enc_key, keys + WPS_MGMTAUTHKEY_LEN,
- WPS_MGMTENCKEY_LEN);
-
- addr[0] = nonces;
- len[0] = sizeof(nonces);
-
- /* MgmtEncKeyID = first 128 bits of
- * SHA-256(N1 || N2 || "WFA-WLAN-Management-MgmtAuthKey") */
- addr[1] = (const u8 *) auth_label;
- len[1] = os_strlen(auth_label);
- sha256_vector(2, addr, len, hash);
- os_memcpy(wps->mgmt_auth_key_id, hash, WPS_MGMT_KEY_ID_LEN);
-
- /* MgmtEncKeyID = first 128 bits of
- * SHA-256(N1 || N2 || "WFA-WLAN-Management-MgmtEncKey") */
- addr[1] = (const u8 *) enc_label;
- len[1] = os_strlen(enc_label);
- sha256_vector(2, addr, len, hash);
- os_memcpy(wps->mgmt_enc_key_id, hash, WPS_MGMT_KEY_ID_LEN);
-
- wpa_hexdump_key(MSG_DEBUG, "WPS: MgmtAuthKey",
- wps->mgmt_auth_key, WPS_MGMTAUTHKEY_LEN);
- wpa_hexdump(MSG_DEBUG, "WPS: MgmtAuthKeyID",
- wps->mgmt_auth_key_id, WPS_MGMT_KEY_ID_LEN);
- wpa_hexdump_key(MSG_DEBUG, "WPS: MgmtEncKey",
- wps->mgmt_enc_key, WPS_MGMTENCKEY_LEN);
- wpa_hexdump(MSG_DEBUG, "WPS: MgmtEncKeyID",
- wps->mgmt_enc_key_id, WPS_MGMT_KEY_ID_LEN);
-
- return 0;
-}
-
-
void wps_derive_psk(struct wps_data *wps, const u8 *dev_passwd,
size_t dev_passwd_len)
{
return decrypted;
}
+
+
+/**
+ * wps_pin_checksum - Compute PIN checksum
+ * @pin: Seven digit PIN (i.e., eight digit PIN without the checksum digit)
+ * Returns: Checksum digit
+ */
+unsigned int wps_pin_checksum(unsigned int pin)
+{
+ unsigned int accum = 0;
+ while (pin) {
+ accum += 3 * (pin % 10);
+ pin /= 10;
+ accum += pin % 10;
+ pin /= 10;
+ }
+
+ return (10 - accum % 10) % 10;
+}
+
+
+/**
+ * wps_pin_valid - Check whether a PIN has a valid checksum
+ * @pin: Eight digit PIN (i.e., including the checksum digit)
+ * Returns: 1 if checksum digit is valid, or 0 if not
+ */
+unsigned int wps_pin_valid(unsigned int pin)
+{
+ return wps_pin_checksum(pin / 10) == (pin % 10);
+}
+
+
+/**
+ * wps_generate_pin - Generate a random PIN
+ * Returns: Eight digit PIN (i.e., including the checksum digit)
+ */
+unsigned int wps_generate_pin(void)
+{
+ unsigned int val;
+
+ /* Generate seven random digits for the PIN */
+ if (os_get_random((unsigned char *) &val, sizeof(val)) < 0) {
+ struct os_time now;
+ os_get_time(&now);
+ val = os_random() ^ now.sec ^ now.usec;
+ }
+ val %= 10000000;
+
+ /* Append checksum digit */
+ return val * 10 + wps_pin_checksum(val);
+}
+
+
+void wps_fail_event(struct wps_context *wps, enum wps_msg_type msg)
+{
+ union wps_event_data data;
+
+ if (wps->event_cb == NULL)
+ return;
+
+ os_memset(&data, 0, sizeof(data));
+ data.fail.msg = msg;
+ wps->event_cb(wps->cb_ctx, WPS_EV_FAIL, &data);
+}
+
+
+void wps_success_event(struct wps_context *wps)
+{
+ if (wps->event_cb == NULL)
+ return;
+
+ wps->event_cb(wps->cb_ctx, WPS_EV_SUCCESS, NULL);
+}
+
+
+void wps_pwd_auth_fail_event(struct wps_context *wps, int enrollee, int part)
+{
+ union wps_event_data data;
+
+ if (wps->event_cb == NULL)
+ return;
+
+ os_memset(&data, 0, sizeof(data));
+ data.pwd_auth_fail.enrollee = enrollee;
+ data.pwd_auth_fail.part = part;
+ wps->event_cb(wps->cb_ctx, WPS_EV_PWD_AUTH_FAIL, &data);
+}
+
+
+void wps_pbc_overlap_event(struct wps_context *wps)
+{
+ if (wps->event_cb == NULL)
+ return;
+
+ wps->event_cb(wps->cb_ctx, WPS_EV_PBC_OVERLAP, NULL);
+}
+
+
+void wps_pbc_timeout_event(struct wps_context *wps)
+{
+ if (wps->event_cb == NULL)
+ return;
+
+ wps->event_cb(wps->cb_ctx, WPS_EV_PBC_TIMEOUT, NULL);
+}
+
+
+#ifdef CONFIG_WPS_OOB
+
+static struct wpabuf * wps_get_oob_cred(struct wps_context *wps)
+{
+ struct wps_data data;
+ struct wpabuf *plain;
+
+ plain = wpabuf_alloc(500);
+ if (plain == NULL) {
+ wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB "
+ "credential");
+ return NULL;
+ }
+
+ os_memset(&data, 0, sizeof(data));
+ data.wps = wps;
+ data.auth_type = wps->auth_types;
+ data.encr_type = wps->encr_types;
+ if (wps_build_version(plain) || wps_build_cred(&data, plain)) {
+ wpabuf_free(plain);
+ return NULL;
+ }
+
+ return plain;
+}
+
+
+static struct wpabuf * wps_get_oob_dev_pwd(struct wps_context *wps)
+{
+ struct wpabuf *data;
+
+ data = wpabuf_alloc(9 + WPS_OOB_DEVICE_PASSWORD_ATTR_LEN);
+ if (data == NULL) {
+ wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB "
+ "device password attribute");
+ return NULL;
+ }
+
+ wpabuf_free(wps->oob_conf.dev_password);
+ wps->oob_conf.dev_password =
+ wpabuf_alloc(WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1);
+ if (wps->oob_conf.dev_password == NULL) {
+ wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB "
+ "device password");
+ wpabuf_free(data);
+ return NULL;
+ }
+
+ if (wps_build_version(data) ||
+ wps_build_oob_dev_password(data, wps)) {
+ wpa_printf(MSG_ERROR, "WPS: Build OOB device password "
+ "attribute error");
+ wpabuf_free(data);
+ return NULL;
+ }
+
+ return data;
+}
+
+
+static int wps_parse_oob_dev_pwd(struct wps_context *wps,
+ struct wpabuf *data)
+{
+ struct oob_conf_data *oob_conf = &wps->oob_conf;
+ struct wps_parse_attr attr;
+ const u8 *pos;
+
+ if (wps_parse_msg(data, &attr) < 0 ||
+ attr.oob_dev_password == NULL) {
+ wpa_printf(MSG_ERROR, "WPS: OOB device password not found");
+ return -1;
+ }
+
+ pos = attr.oob_dev_password;
+
+ oob_conf->pubkey_hash =
+ wpabuf_alloc_copy(pos, WPS_OOB_PUBKEY_HASH_LEN);
+ if (oob_conf->pubkey_hash == NULL) {
+ wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB "
+ "public key hash");
+ return -1;
+ }
+ pos += WPS_OOB_PUBKEY_HASH_LEN;
+
+ wps->oob_dev_pw_id = WPA_GET_BE16(pos);
+ pos += sizeof(wps->oob_dev_pw_id);
+
+ oob_conf->dev_password =
+ wpabuf_alloc(WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1);
+ if (oob_conf->dev_password == NULL) {
+ wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB "
+ "device password");
+ return -1;
+ }
+ wpa_snprintf_hex_uppercase(wpabuf_put(oob_conf->dev_password,
+ wpabuf_size(oob_conf->dev_password)),
+ wpabuf_size(oob_conf->dev_password), pos,
+ WPS_OOB_DEVICE_PASSWORD_LEN);
+
+ return 0;
+}
+
+
+static int wps_parse_oob_cred(struct wps_context *wps, struct wpabuf *data)
+{
+ struct wpabuf msg;
+ struct wps_parse_attr attr;
+ size_t i;
+
+ if (wps_parse_msg(data, &attr) < 0 || attr.num_cred <= 0) {
+ wpa_printf(MSG_ERROR, "WPS: OOB credential not found");
+ return -1;
+ }
+
+ for (i = 0; i < attr.num_cred; i++) {
+ struct wps_credential local_cred;
+ struct wps_parse_attr cattr;
+
+ os_memset(&local_cred, 0, sizeof(local_cred));
+ wpabuf_set(&msg, attr.cred[i], attr.cred_len[i]);
+ if (wps_parse_msg(&msg, &cattr) < 0 ||
+ wps_process_cred(&cattr, &local_cred)) {
+ wpa_printf(MSG_ERROR, "WPS: Failed to parse OOB "
+ "credential");
+ return -1;
+ }
+ wps->cred_cb(wps->cb_ctx, &local_cred);
+ }
+
+ return 0;
+}
+
+
+int wps_process_oob(struct wps_context *wps, struct oob_device_data *oob_dev,
+ int registrar)
+{
+ struct wpabuf *data;
+ int ret, write_f, oob_method = wps->oob_conf.oob_method;
+ void *oob_priv;
+
+ write_f = oob_method == OOB_METHOD_DEV_PWD_E ? !registrar : registrar;
+
+ oob_priv = oob_dev->init_func(wps, oob_dev, registrar);
+ if (oob_priv == NULL) {
+ wpa_printf(MSG_ERROR, "WPS: Failed to initialize OOB device");
+ return -1;
+ }
+
+ if (write_f) {
+ if (oob_method == OOB_METHOD_CRED)
+ data = wps_get_oob_cred(wps);
+ else
+ data = wps_get_oob_dev_pwd(wps);
+
+ ret = 0;
+ if (data == NULL || oob_dev->write_func(oob_priv, data) < 0)
+ ret = -1;
+ } else {
+ data = oob_dev->read_func(oob_priv);
+ if (data == NULL)
+ ret = -1;
+ else {
+ if (oob_method == OOB_METHOD_CRED)
+ ret = wps_parse_oob_cred(wps, data);
+ else
+ ret = wps_parse_oob_dev_pwd(wps, data);
+ }
+ }
+ wpabuf_free(data);
+ oob_dev->deinit_func(oob_priv);
+
+ if (ret < 0) {
+ wpa_printf(MSG_ERROR, "WPS: Failed to process OOB data");
+ return -1;
+ }
+
+ return 0;
+}
+
+
+struct oob_device_data * wps_get_oob_device(char *device_type)
+{
+#ifdef CONFIG_WPS_UFD
+ if (os_strstr(device_type, "ufd") != NULL)
+ return &oob_ufd_device_data;
+#endif /* CONFIG_WPS_UFD */
+#ifdef CONFIG_WPS_NFC
+ if (os_strstr(device_type, "nfc") != NULL)
+ return &oob_nfc_device_data;
+#endif /* CONFIG_WPS_NFC */
+
+ return NULL;
+}
+
+
+#ifdef CONFIG_WPS_NFC
+struct oob_nfc_device_data * wps_get_oob_nfc_device(char *device_name)
+{
+ if (device_name == NULL)
+ return NULL;
+#ifdef CONFIG_WPS_NFC_PN531
+ if (os_strstr(device_name, "pn531") != NULL)
+ return &oob_nfc_pn531_device_data;
+#endif /* CONFIG_WPS_NFC_PN531 */
+
+ return NULL;
+}
+#endif /* CONFIG_WPS_NFC */
+
+
+int wps_get_oob_method(char *method)
+{
+ if (os_strstr(method, "pin-e") != NULL)
+ return OOB_METHOD_DEV_PWD_E;
+ if (os_strstr(method, "pin-r") != NULL)
+ return OOB_METHOD_DEV_PWD_R;
+ if (os_strstr(method, "cred") != NULL)
+ return OOB_METHOD_CRED;
+ return OOB_METHOD_UNKNOWN;
+}
+
+#endif /* CONFIG_WPS_OOB */
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