WPS: Fix OOB Device Password use for EAP-WSC peer

The OOB Device Password is passed in as a hexdump of the real Device
Password (16..32 octets of arbitrary binary data). The hexdump needs to
be converted to binary form before passing it for WPS processing.

Signed-hostap: Jouni Malinen <j@w1.fi>

src/eap_peer/eap_wsc.c

@@ -1,6 +1,6 @@
 /*
  * EAP-WSC peer for Wi-Fi Protected Setup
- * Copyright (c) 2007-2009, Jouni Malinen <j@w1.fi>
+ * 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.
@@ -137,6 +137,7 @@ static void * eap_wsc_init(struct eap_sm *sm)
 	struct wps_context *wps;
 	struct wps_credential new_ap_settings;
 	int res;
+	u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN];
 
 	wps = sm->wps;
 	if (wps == NULL) {
@@ -184,6 +185,14 @@ static void * eap_wsc_init(struct eap_sm *sm)
 		while (*pos != '\0' && *pos != ' ')
 			pos++;
 		cfg.pin_len = pos - (const char *) cfg.pin;
+		if (cfg.pin_len >= WPS_OOB_DEVICE_PASSWORD_MIN_LEN * 2 &&
+		    cfg.pin_len <= WPS_OOB_DEVICE_PASSWORD_LEN * 2 &&
+		    hexstr2bin((const char *) cfg.pin, dev_pw,
+			       cfg.pin_len / 2) == 0) {
+			/* Convert OOB Device Password to binary */
+			cfg.pin = dev_pw;
+			cfg.pin_len /= 2;
+		}
 	} else {
 		pos = os_strstr(phase1, "pbc=1");
 		if (pos)