Stripped down import of hostapd v0.3.7

1 files changed, 180 insertions, 0 deletions

diff --git a/contrib/hostapd/eap_md5.c b/contrib/hostapd/eap_md5.c
new file mode 100644
index 0000000..5675c50
--- /dev/null
+++ b/contrib/hostapd/eap_md5.c
@@ -0,0 +1,180 @@
+/*
+ * hostapd / EAP-MD5 server
+ * 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 <netinet/in.h>
+
+#include "hostapd.h"
+#include "common.h"
+#include "eap_i.h"
+#include "md5.h"
+
+
+#define CHALLENGE_LEN 16
+
+struct eap_md5_data {
+	u8 challenge[CHALLENGE_LEN];
+	enum { CONTINUE, SUCCESS, FAILURE } state;
+};
+
+
+static void * eap_md5_init(struct eap_sm *sm)
+{
+	struct eap_md5_data *data;
+
+	data = malloc(sizeof(*data));
+	if (data == NULL)
+		return data;
+	memset(data, 0, sizeof(*data));
+	data->state = CONTINUE;
+
+	return data;
+}
+
+
+static void eap_md5_reset(struct eap_sm *sm, void *priv)
+{
+	struct eap_md5_data *data = priv;
+	free(data);
+}
+
+
+static u8 * eap_md5_buildReq(struct eap_sm *sm, void *priv, int id,
+			     size_t *reqDataLen)
+{
+	struct eap_md5_data *data = priv;
+	struct eap_hdr *req;
+	u8 *pos;
+
+	if (hostapd_get_rand(data->challenge, CHALLENGE_LEN)) {
+		wpa_printf(MSG_ERROR, "EAP-MD5: Failed to get random data");
+		data->state = FAILURE;
+		return NULL;
+	}
+
+	*reqDataLen = sizeof(*req) + 2 + CHALLENGE_LEN;
+	req = malloc(*reqDataLen);
+	if (req == NULL) {
+		wpa_printf(MSG_ERROR, "EAP-MD5: Failed to allocate memory for "
+			   "request");
+		data->state = FAILURE;
+		return NULL;
+	}
+
+	req->code = EAP_CODE_REQUEST;
+	req->identifier = id;
+	req->length = htons(*reqDataLen);
+	pos = (u8 *) (req + 1);
+	*pos++ = EAP_TYPE_MD5;
+	*pos++ = CHALLENGE_LEN;
+	memcpy(pos, data->challenge, CHALLENGE_LEN);
+	wpa_hexdump(MSG_MSGDUMP, "EAP-MD5: Challenge", pos, CHALLENGE_LEN);
+
+	data->state = CONTINUE;
+
+	return (u8 *) req;
+}
+
+
+static Boolean eap_md5_check(struct eap_sm *sm, void *priv,
+			     u8 *respData, size_t respDataLen)
+{
+	struct eap_hdr *resp;
+	u8 *pos;
+	size_t len;
+
+	resp = (struct eap_hdr *) respData;
+	pos = (u8 *) (resp + 1);
+	if (respDataLen < sizeof(*resp) + 2 || *pos != EAP_TYPE_MD5 ||
+	    (len = ntohs(resp->length)) > respDataLen) {
+		wpa_printf(MSG_INFO, "EAP-MD5: Invalid frame");
+		return TRUE;
+	}
+	pos++;
+	if (*pos != MD5_MAC_LEN ||
+	    sizeof(*resp) + 2 + MD5_MAC_LEN > len) {
+		wpa_printf(MSG_INFO, "EAP-MD5: Invalid response "
+			   "(response_len=%d respDataLen=%lu",
+			   *pos, (unsigned long) respDataLen);
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+
+static void eap_md5_process(struct eap_sm *sm, void *priv,
+			    u8 *respData, size_t respDataLen)
+{
+	struct eap_md5_data *data = priv;
+	struct eap_hdr *resp;
+	u8 *pos;
+	MD5_CTX context;
+	u8 hash[MD5_MAC_LEN];
+
+	if (sm->user == NULL || sm->user->password == NULL) {
+		wpa_printf(MSG_INFO, "EAP-MD5: Password not configured");
+		data->state = FAILURE;
+		return;
+	}
+
+	resp = (struct eap_hdr *) respData;
+	pos = (u8 *) (resp + 1);
+	pos += 2; /* Skip type and len */
+	wpa_hexdump(MSG_MSGDUMP, "EAP-MD5: Response", pos, MD5_MAC_LEN);
+
+	MD5Init(&context);
+	MD5Update(&context, &resp->identifier, 1);
+	MD5Update(&context, sm->user->password, sm->user->password_len);
+	MD5Update(&context, data->challenge, CHALLENGE_LEN);
+	MD5Final(hash, &context);
+
+	if (memcmp(hash, pos, MD5_MAC_LEN) == 0) {
+		wpa_printf(MSG_DEBUG, "EAP-MD5: Done - Success");
+		data->state = SUCCESS;
+	} else {
+		wpa_printf(MSG_DEBUG, "EAP-MD5: Done - Failure");
+		data->state = FAILURE;
+	}
+}
+
+
+static Boolean eap_md5_isDone(struct eap_sm *sm, void *priv)
+{
+	struct eap_md5_data *data = priv;
+	return data->state != CONTINUE;
+}
+
+
+static Boolean eap_md5_isSuccess(struct eap_sm *sm, void *priv)
+{
+	struct eap_md5_data *data = priv;
+	return data->state == SUCCESS;
+}
+
+
+const struct eap_method eap_method_md5 =
+{
+	.method = EAP_TYPE_MD5,
+	.name = "MD5",
+	.init = eap_md5_init,
+	.reset = eap_md5_reset,
+	.buildReq = eap_md5_buildReq,
+	.check = eap_md5_check,
+	.process = eap_md5_process,
+	.isDone = eap_md5_isDone,
+	.isSuccess = eap_md5_isSuccess,
+};