+++ /dev/null
-/*
- * EAP-WSC peer for Wi-Fi Protected Setup
- * Copyright (c) 2007-2009, 2012, Jouni Malinen <j@w1.fi>
- *
- * This software may be distributed under the terms of the BSD license.
- * See README for more details.
- */
-
-#include "includes.h"
-
-#include "common.h"
-#include "uuid.h"
-#include "eap_i.h"
-#include "eap_common/eap_wsc_common.h"
-#include "wps/wps.h"
-#include "wps/wps_defs.h"
-
-
-struct eap_wsc_data {
- enum { WAIT_START, MESG, WAIT_FRAG_ACK, FAIL } state;
- int registrar;
- struct wpabuf *in_buf;
- struct wpabuf *out_buf;
- enum wsc_op_code in_op_code, out_op_code;
- size_t out_used;
- size_t fragment_size;
- struct wps_data *wps;
- struct wps_context *wps_ctx;
-};
-
-
-static const char * eap_wsc_state_txt(int state)
-{
- switch (state) {
- case WAIT_START:
- return "WAIT_START";
- case MESG:
- return "MESG";
- case WAIT_FRAG_ACK:
- return "WAIT_FRAG_ACK";
- case FAIL:
- return "FAIL";
- default:
- return "?";
- }
-}
-
-
-static void eap_wsc_state(struct eap_wsc_data *data, int state)
-{
- wpa_printf(MSG_DEBUG, "EAP-WSC: %s -> %s",
- eap_wsc_state_txt(data->state),
- eap_wsc_state_txt(state));
- data->state = state;
-}
-
-
-static int eap_wsc_new_ap_settings(struct wps_credential *cred,
- const char *params)
-{
- const char *pos, *end;
- size_t len;
-
- os_memset(cred, 0, sizeof(*cred));
-
- pos = os_strstr(params, "new_ssid=");
- if (pos == NULL)
- return 0;
- pos += 9;
- end = os_strchr(pos, ' ');
- if (end == NULL)
- len = os_strlen(pos);
- else
- len = end - pos;
- if ((len & 1) || len > 2 * sizeof(cred->ssid) ||
- hexstr2bin(pos, cred->ssid, len / 2)) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Invalid new_ssid");
- return -1;
- }
- cred->ssid_len = len / 2;
-
- pos = os_strstr(params, "new_auth=");
- if (pos == NULL) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Missing new_auth");
- return -1;
- }
- if (os_strncmp(pos + 9, "OPEN", 4) == 0)
- cred->auth_type = WPS_AUTH_OPEN;
- else if (os_strncmp(pos + 9, "WPAPSK", 6) == 0)
- cred->auth_type = WPS_AUTH_WPAPSK;
- else if (os_strncmp(pos + 9, "WPA2PSK", 7) == 0)
- cred->auth_type = WPS_AUTH_WPA2PSK;
- else {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Unknown new_auth");
- return -1;
- }
-
- pos = os_strstr(params, "new_encr=");
- if (pos == NULL) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Missing new_encr");
- return -1;
- }
- if (os_strncmp(pos + 9, "NONE", 4) == 0)
- cred->encr_type = WPS_ENCR_NONE;
-#ifdef CONFIG_TESTING_OPTIONS
- else if (os_strncmp(pos + 9, "WEP", 3) == 0)
- cred->encr_type = WPS_ENCR_WEP;
-#endif /* CONFIG_TESTING_OPTIONS */
- else if (os_strncmp(pos + 9, "TKIP", 4) == 0)
- cred->encr_type = WPS_ENCR_TKIP;
- else if (os_strncmp(pos + 9, "CCMP", 4) == 0)
- cred->encr_type = WPS_ENCR_AES;
- else {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Unknown new_encr");
- return -1;
- }
-
- pos = os_strstr(params, "new_key=");
- if (pos == NULL)
- return 0;
- pos += 8;
- end = os_strchr(pos, ' ');
- if (end == NULL)
- len = os_strlen(pos);
- else
- len = end - pos;
- if ((len & 1) || len > 2 * sizeof(cred->key) ||
- hexstr2bin(pos, cred->key, len / 2)) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Invalid new_key");
- return -1;
- }
- cred->key_len = len / 2;
-
- return 1;
-}
-
-
-static void * eap_wsc_init(struct eap_sm *sm)
-{
- struct eap_wsc_data *data;
- const u8 *identity;
- size_t identity_len;
- int registrar;
- struct wps_config cfg;
- const char *pos, *end;
- const char *phase1;
- struct wps_context *wps;
- struct wps_credential new_ap_settings;
- int res;
- int nfc = 0;
- u8 pkhash[WPS_OOB_PUBKEY_HASH_LEN];
-
- wps = sm->wps;
- if (wps == NULL) {
- wpa_printf(MSG_ERROR, "EAP-WSC: WPS context not available");
- return NULL;
- }
-
- identity = eap_get_config_identity(sm, &identity_len);
-
- if (identity && identity_len == WSC_ID_REGISTRAR_LEN &&
- os_memcmp(identity, WSC_ID_REGISTRAR, WSC_ID_REGISTRAR_LEN) == 0)
- registrar = 1; /* Supplicant is Registrar */
- else if (identity && identity_len == WSC_ID_ENROLLEE_LEN &&
- os_memcmp(identity, WSC_ID_ENROLLEE, WSC_ID_ENROLLEE_LEN) == 0)
- registrar = 0; /* Supplicant is Enrollee */
- else {
- wpa_hexdump_ascii(MSG_INFO, "EAP-WSC: Unexpected identity",
- identity, identity_len);
- return NULL;
- }
-
- data = os_zalloc(sizeof(*data));
- if (data == NULL)
- return NULL;
- data->state = registrar ? MESG : WAIT_START;
- data->registrar = registrar;
- data->wps_ctx = wps;
-
- os_memset(&cfg, 0, sizeof(cfg));
- cfg.wps = wps;
- cfg.registrar = registrar;
-
- phase1 = eap_get_config_phase1(sm);
- if (phase1 == NULL) {
- wpa_printf(MSG_INFO, "EAP-WSC: phase1 configuration data not "
- "set");
- os_free(data);
- return NULL;
- }
-
- pos = os_strstr(phase1, "pin=");
- if (pos) {
- pos += 4;
- cfg.pin = (const u8 *) pos;
- while (*pos != '\0' && *pos != ' ')
- pos++;
- cfg.pin_len = pos - (const char *) cfg.pin;
- if (cfg.pin_len == 6 &&
- os_strncmp((const char *) cfg.pin, "nfc-pw", 6) == 0) {
- cfg.pin = NULL;
- cfg.pin_len = 0;
- nfc = 1;
- }
- } else {
- pos = os_strstr(phase1, "pbc=1");
- if (pos)
- cfg.pbc = 1;
- }
-
- pos = os_strstr(phase1, "dev_pw_id=");
- if (pos) {
- u16 id = atoi(pos + 10);
- if (id == DEV_PW_NFC_CONNECTION_HANDOVER)
- nfc = 1;
- if (cfg.pin || id == DEV_PW_NFC_CONNECTION_HANDOVER)
- cfg.dev_pw_id = id;
- }
-
- if (cfg.pin == NULL && !cfg.pbc && !nfc) {
- wpa_printf(MSG_INFO, "EAP-WSC: PIN or PBC not set in phase1 "
- "configuration data");
- os_free(data);
- return NULL;
- }
-
- pos = os_strstr(phase1, " pkhash=");
- if (pos) {
- size_t len;
- pos += 8;
- end = os_strchr(pos, ' ');
- if (end)
- len = end - pos;
- else
- len = os_strlen(pos);
- if (len != 2 * WPS_OOB_PUBKEY_HASH_LEN ||
- hexstr2bin(pos, pkhash, WPS_OOB_PUBKEY_HASH_LEN)) {
- wpa_printf(MSG_INFO, "EAP-WSC: Invalid pkhash");
- os_free(data);
- return NULL;
- }
- cfg.peer_pubkey_hash = pkhash;
- }
-
- res = eap_wsc_new_ap_settings(&new_ap_settings, phase1);
- if (res < 0) {
- os_free(data);
- wpa_printf(MSG_DEBUG, "EAP-WSC: Failed to parse new AP "
- "settings");
- return NULL;
- }
- if (res == 1) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Provide new AP settings for "
- "WPS");
- cfg.new_ap_settings = &new_ap_settings;
- }
-
- data->wps = wps_init(&cfg);
- if (data->wps == NULL) {
- os_free(data);
- wpa_printf(MSG_DEBUG, "EAP-WSC: wps_init failed");
- return NULL;
- }
- res = eap_get_config_fragment_size(sm);
- if (res > 0)
- data->fragment_size = res;
- else
- data->fragment_size = WSC_FRAGMENT_SIZE;
- wpa_printf(MSG_DEBUG, "EAP-WSC: Fragment size limit %u",
- (unsigned int) data->fragment_size);
-
- if (registrar && cfg.pin) {
- wps_registrar_add_pin(data->wps_ctx->registrar, NULL, NULL,
- cfg.pin, cfg.pin_len, 0);
- }
-
- /* Use reduced client timeout for WPS to avoid long wait */
- if (sm->ClientTimeout > 30)
- sm->ClientTimeout = 30;
-
- return data;
-}
-
-
-static void eap_wsc_deinit(struct eap_sm *sm, void *priv)
-{
- struct eap_wsc_data *data = priv;
- wpabuf_free(data->in_buf);
- wpabuf_free(data->out_buf);
- wps_deinit(data->wps);
- os_free(data->wps_ctx->network_key);
- data->wps_ctx->network_key = NULL;
- os_free(data);
-}
-
-
-static struct wpabuf * eap_wsc_build_msg(struct eap_wsc_data *data,
- struct eap_method_ret *ret, u8 id)
-{
- struct wpabuf *resp;
- u8 flags;
- size_t send_len, plen;
-
- ret->ignore = FALSE;
- wpa_printf(MSG_DEBUG, "EAP-WSC: Generating Response");
- ret->allowNotifications = TRUE;
-
- flags = 0;
- send_len = wpabuf_len(data->out_buf) - data->out_used;
- if (2 + send_len > data->fragment_size) {
- send_len = data->fragment_size - 2;
- flags |= WSC_FLAGS_MF;
- if (data->out_used == 0) {
- flags |= WSC_FLAGS_LF;
- send_len -= 2;
- }
- }
- plen = 2 + send_len;
- if (flags & WSC_FLAGS_LF)
- plen += 2;
- resp = eap_msg_alloc(EAP_VENDOR_WFA, EAP_VENDOR_TYPE_WSC, plen,
- EAP_CODE_RESPONSE, id);
- if (resp == NULL)
- return NULL;
-
- wpabuf_put_u8(resp, data->out_op_code); /* Op-Code */
- wpabuf_put_u8(resp, flags); /* Flags */
- if (flags & WSC_FLAGS_LF)
- wpabuf_put_be16(resp, wpabuf_len(data->out_buf));
-
- wpabuf_put_data(resp, wpabuf_head_u8(data->out_buf) + data->out_used,
- send_len);
- data->out_used += send_len;
-
- ret->methodState = METHOD_MAY_CONT;
- ret->decision = DECISION_FAIL;
-
- if (data->out_used == wpabuf_len(data->out_buf)) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Sending out %lu bytes "
- "(message sent completely)",
- (unsigned long) send_len);
- wpabuf_free(data->out_buf);
- data->out_buf = NULL;
- data->out_used = 0;
- if ((data->state == FAIL && data->out_op_code == WSC_ACK) ||
- data->out_op_code == WSC_NACK ||
- data->out_op_code == WSC_Done) {
- eap_wsc_state(data, FAIL);
- ret->methodState = METHOD_DONE;
- } else
- eap_wsc_state(data, MESG);
- } else {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Sending out %lu bytes "
- "(%lu more to send)", (unsigned long) send_len,
- (unsigned long) wpabuf_len(data->out_buf) -
- data->out_used);
- eap_wsc_state(data, WAIT_FRAG_ACK);
- }
-
- return resp;
-}
-
-
-static int eap_wsc_process_cont(struct eap_wsc_data *data,
- const u8 *buf, size_t len, u8 op_code)
-{
- /* Process continuation of a pending message */
- if (op_code != data->in_op_code) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Unexpected Op-Code %d in "
- "fragment (expected %d)",
- op_code, data->in_op_code);
- return -1;
- }
-
- if (len > wpabuf_tailroom(data->in_buf)) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Fragment overflow");
- eap_wsc_state(data, FAIL);
- return -1;
- }
-
- wpabuf_put_data(data->in_buf, buf, len);
- wpa_printf(MSG_DEBUG, "EAP-WSC: Received %lu bytes, waiting "
- "for %lu bytes more", (unsigned long) len,
- (unsigned long) wpabuf_tailroom(data->in_buf));
-
- return 0;
-}
-
-
-static struct wpabuf * eap_wsc_process_fragment(struct eap_wsc_data *data,
- struct eap_method_ret *ret,
- u8 id, u8 flags, u8 op_code,
- u16 message_length,
- const u8 *buf, size_t len)
-{
- /* Process a fragment that is not the last one of the message */
- if (data->in_buf == NULL && !(flags & WSC_FLAGS_LF)) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: No Message Length field in a "
- "fragmented packet");
- ret->ignore = TRUE;
- return NULL;
- }
-
- if (data->in_buf == NULL) {
- /* First fragment of the message */
- data->in_buf = wpabuf_alloc(message_length);
- if (data->in_buf == NULL) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: No memory for "
- "message");
- ret->ignore = TRUE;
- return NULL;
- }
- data->in_op_code = op_code;
- wpabuf_put_data(data->in_buf, buf, len);
- wpa_printf(MSG_DEBUG, "EAP-WSC: Received %lu bytes in first "
- "fragment, waiting for %lu bytes more",
- (unsigned long) len,
- (unsigned long) wpabuf_tailroom(data->in_buf));
- }
-
- return eap_wsc_build_frag_ack(id, EAP_CODE_RESPONSE);
-}
-
-
-static struct wpabuf * eap_wsc_process(struct eap_sm *sm, void *priv,
- struct eap_method_ret *ret,
- const struct wpabuf *reqData)
-{
- struct eap_wsc_data *data = priv;
- const u8 *start, *pos, *end;
- size_t len;
- u8 op_code, flags, id;
- u16 message_length = 0;
- enum wps_process_res res;
- struct wpabuf tmpbuf;
- struct wpabuf *r;
-
- pos = eap_hdr_validate(EAP_VENDOR_WFA, EAP_VENDOR_TYPE_WSC, reqData,
- &len);
- if (pos == NULL || len < 2) {
- ret->ignore = TRUE;
- return NULL;
- }
-
- id = eap_get_id(reqData);
-
- start = pos;
- end = start + len;
-
- op_code = *pos++;
- flags = *pos++;
- if (flags & WSC_FLAGS_LF) {
- if (end - pos < 2) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Message underflow");
- ret->ignore = TRUE;
- return NULL;
- }
- message_length = WPA_GET_BE16(pos);
- pos += 2;
-
- if (message_length < end - pos || message_length > 50000) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Invalid Message "
- "Length");
- ret->ignore = TRUE;
- return NULL;
- }
- }
-
- wpa_printf(MSG_DEBUG, "EAP-WSC: Received packet: Op-Code %d "
- "Flags 0x%x Message Length %d",
- op_code, flags, message_length);
-
- if (data->state == WAIT_FRAG_ACK) {
- if (op_code != WSC_FRAG_ACK) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Unexpected Op-Code %d "
- "in WAIT_FRAG_ACK state", op_code);
- ret->ignore = TRUE;
- return NULL;
- }
- wpa_printf(MSG_DEBUG, "EAP-WSC: Fragment acknowledged");
- eap_wsc_state(data, MESG);
- return eap_wsc_build_msg(data, ret, id);
- }
-
- if (op_code != WSC_ACK && op_code != WSC_NACK && op_code != WSC_MSG &&
- op_code != WSC_Done && op_code != WSC_Start) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Unexpected Op-Code %d",
- op_code);
- ret->ignore = TRUE;
- return NULL;
- }
-
- if (data->state == WAIT_START) {
- if (op_code != WSC_Start) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Unexpected Op-Code %d "
- "in WAIT_START state", op_code);
- ret->ignore = TRUE;
- return NULL;
- }
- wpa_printf(MSG_DEBUG, "EAP-WSC: Received start");
- eap_wsc_state(data, MESG);
- /* Start message has empty payload, skip processing */
- goto send_msg;
- } else if (op_code == WSC_Start) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Unexpected Op-Code %d",
- op_code);
- ret->ignore = TRUE;
- return NULL;
- }
-
- if (data->in_buf &&
- eap_wsc_process_cont(data, pos, end - pos, op_code) < 0) {
- ret->ignore = TRUE;
- return NULL;
- }
-
- if (flags & WSC_FLAGS_MF) {
- return eap_wsc_process_fragment(data, ret, id, flags, op_code,
- message_length, pos,
- end - pos);
- }
-
- if (data->in_buf == NULL) {
- /* Wrap unfragmented messages as wpabuf without extra copy */
- wpabuf_set(&tmpbuf, pos, end - pos);
- data->in_buf = &tmpbuf;
- }
-
- res = wps_process_msg(data->wps, op_code, data->in_buf);
- switch (res) {
- case WPS_DONE:
- wpa_printf(MSG_DEBUG, "EAP-WSC: WPS processing completed "
- "successfully - wait for EAP failure");
- eap_wsc_state(data, FAIL);
- break;
- case WPS_CONTINUE:
- eap_wsc_state(data, MESG);
- break;
- case WPS_FAILURE:
- case WPS_PENDING:
- wpa_printf(MSG_DEBUG, "EAP-WSC: WPS processing failed");
- eap_wsc_state(data, FAIL);
- break;
- }
-
- if (data->in_buf != &tmpbuf)
- wpabuf_free(data->in_buf);
- data->in_buf = NULL;
-
-send_msg:
- if (data->out_buf == NULL) {
- data->out_buf = wps_get_msg(data->wps, &data->out_op_code);
- if (data->out_buf == NULL) {
- wpa_printf(MSG_DEBUG, "EAP-WSC: Failed to receive "
- "message from WPS");
- eap_wsc_state(data, FAIL);
- ret->methodState = METHOD_DONE;
- ret->decision = DECISION_FAIL;
- return NULL;
- }
- data->out_used = 0;
- }
-
- eap_wsc_state(data, MESG);
- r = eap_wsc_build_msg(data, ret, id);
- if (data->state == FAIL && ret->methodState == METHOD_DONE) {
- /* Use reduced client timeout for WPS to avoid long wait */
- if (sm->ClientTimeout > 2)
- sm->ClientTimeout = 2;
- }
- return r;
-}
-
-
-int eap_peer_wsc_register(void)
-{
- struct eap_method *eap;
-
- eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
- EAP_VENDOR_WFA, EAP_VENDOR_TYPE_WSC,
- "WSC");
- if (eap == NULL)
- return -1;
-
- eap->init = eap_wsc_init;
- eap->deinit = eap_wsc_deinit;
- eap->process = eap_wsc_process;
-
- return eap_peer_method_register(eap);
-}
projects / mech_eap.git / blobdiff