Stripped down import of wpa_supplicant v0.3.8

1 files changed, 164 insertions, 0 deletions

diff --git a/contrib/wpa_supplicant/eap_gtc.c b/contrib/wpa_supplicant/eap_gtc.c
new file mode 100644
index 0000000..42a7a49
--- /dev/null
+++ b/contrib/wpa_supplicant/eap_gtc.c
@@ -0,0 +1,164 @@
+/*
+ * WPA Supplicant / EAP-GTC (RFC 2284)
+ * Copyright (c) 2004-2005, Jouni Malinen <jkmaline@cc.hut.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
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "common.h"
+#include "eap_i.h"
+#include "wpa_supplicant.h"
+#include "config_ssid.h"
+
+
+struct eap_gtc_data {
+	int prefix;
+};
+
+
+static void * eap_gtc_init(struct eap_sm *sm)
+{
+	struct eap_gtc_data *data;
+	data = malloc(sizeof(*data));
+	if (data == NULL)
+		return NULL;
+	memset(data, 0, sizeof(*data));
+
+	if (sm->m && sm->m->method == EAP_TYPE_FAST) {
+		wpa_printf(MSG_DEBUG, "EAP-GTC: EAP-FAST tunnel - use prefix "
+			   "with challenge/response");
+		data->prefix = 1;
+	}
+	return data;
+}
+
+
+static void eap_gtc_deinit(struct eap_sm *sm, void *priv)
+{
+	struct eap_gtc_data *data = priv;
+	free(data);
+}
+
+
+static u8 * eap_gtc_process(struct eap_sm *sm, void *priv,
+			    struct eap_method_ret *ret,
+			    u8 *reqData, size_t reqDataLen,
+			    size_t *respDataLen)
+{
+	struct eap_gtc_data *data = priv;
+	struct wpa_ssid *config = eap_get_config(sm);
+	struct eap_hdr *req, *resp;
+	u8 *pos, *password;
+	size_t password_len, len, msg_len;
+
+	req = (struct eap_hdr *) reqData;
+	pos = (u8 *) (req + 1);
+	if (reqDataLen < sizeof(*req) + 1 || *pos != EAP_TYPE_GTC ||
+	    (len = be_to_host16(req->length)) > reqDataLen) {
+		wpa_printf(MSG_INFO, "EAP-GTC: Invalid frame");
+		ret->ignore = TRUE;
+		return NULL;
+	}
+	pos++;
+	msg_len = len - sizeof(*req) - 1;
+	wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-GTC: Request message",
+			  pos, msg_len);
+	if (data->prefix &&
+	    (msg_len < 10 || memcmp(pos, "CHALLENGE=", 10) != 0)) {
+		wpa_printf(MSG_DEBUG, "EAP-GTC: Challenge did not start with "
+			   "expected prefix");
+
+		/* Send an empty response in order to allow tunneled
+		 * acknowledgement of the failure. This will also cover the
+		 * error case which seems to use EAP-MSCHAPv2 like error
+		 * reporting with EAP-GTC inside EAP-FAST tunnel. */
+		*respDataLen = sizeof(struct eap_hdr) + 1;
+		resp = malloc(*respDataLen);
+		if (resp == NULL)
+			return NULL;
+		resp->code = EAP_CODE_RESPONSE;
+		resp->identifier = req->identifier;
+		resp->length = host_to_be16(*respDataLen);
+		pos = (u8 *) (resp + 1);
+		*pos++ = EAP_TYPE_GTC;
+		return (u8 *) resp;
+	}
+
+	if (config == NULL ||
+	    (config->password == NULL && config->otp == NULL)) {
+		wpa_printf(MSG_INFO, "EAP-GTC: Password not configured");
+		eap_sm_request_otp(sm, config, (char *) pos,
+				   len - sizeof(*req) - 1);
+		ret->ignore = TRUE;
+		return NULL;
+	}
+
+	if (config->otp) {
+		password = config->otp;
+		password_len = config->otp_len;
+	} else {
+		password = config->password;
+		password_len = config->password_len;
+	}
+
+	ret->ignore = FALSE;
+
+	ret->methodState = data->prefix ? METHOD_MAY_CONT : METHOD_DONE;
+	ret->decision = DECISION_COND_SUCC;
+	ret->allowNotifications = FALSE;
+
+	*respDataLen = sizeof(struct eap_hdr) + 1 + password_len;
+	if (data->prefix) {
+		*respDataLen += 9 + config->identity_len + 1;
+	}
+	resp = malloc(*respDataLen);
+	if (resp == NULL)
+		return NULL;
+	resp->code = EAP_CODE_RESPONSE;
+	resp->identifier = req->identifier;
+	resp->length = host_to_be16(*respDataLen);
+	pos = (u8 *) (resp + 1);
+	*pos++ = EAP_TYPE_GTC;
+	if (data->prefix) {
+		memcpy(pos, "RESPONSE=", 9);
+		pos += 9;
+		memcpy(pos, config->identity, config->identity_len);
+		pos += config->identity_len;
+		*pos++ = '\0';
+	}
+	memcpy(pos, password, password_len);
+	wpa_hexdump_ascii_key(MSG_MSGDUMP, "EAP-GTC: Response",
+			      (u8 *) (resp + 1) + 1,
+			      *respDataLen - sizeof(struct eap_hdr) - 1);
+
+	if (config->otp) {
+		wpa_printf(MSG_DEBUG, "EAP-GTC: Forgetting used password");
+		memset(config->otp, 0, config->otp_len);
+		free(config->otp);
+		config->otp = NULL;
+		config->otp_len = 0;
+	}
+
+	return (u8 *) resp;
+}
+
+
+const struct eap_method eap_method_gtc =
+{
+	.method = EAP_TYPE_GTC,
+	.name = "GTC",
+	.init = eap_gtc_init,
+	.deinit = eap_gtc_deinit,
+	.process = eap_gtc_process,
+};