Stripped down import of wpa_supplicant v0.3.8

1 files changed, 112 insertions, 0 deletions

diff --git a/contrib/wpa_supplicant/eap_md5.c b/contrib/wpa_supplicant/eap_md5.c
new file mode 100644
index 0000000..bcb5558
--- /dev/null
+++ b/contrib/wpa_supplicant/eap_md5.c
@@ -0,0 +1,112 @@
+/*
+ * WPA Supplicant / EAP-MD5
+ * 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 "common.h"
+#include "eap_i.h"
+#include "wpa_supplicant.h"
+#include "config_ssid.h"
+#include "md5.h"
+
+
+static void * eap_md5_init(struct eap_sm *sm)
+{
+	return (void *) 1;
+}
+
+
+static void eap_md5_deinit(struct eap_sm *sm, void *priv)
+{
+}
+
+
+static u8 * eap_md5_process(struct eap_sm *sm, void *priv,
+			    struct eap_method_ret *ret,
+			    u8 *reqData, size_t reqDataLen,
+			    size_t *respDataLen)
+{
+	struct wpa_ssid *config = eap_get_config(sm);
+	struct eap_hdr *req, *resp;
+	u8 *pos, *challenge;
+	int challenge_len;
+	MD5_CTX context;
+	size_t len;
+
+	if (config == NULL || config->password == NULL) {
+		wpa_printf(MSG_INFO, "EAP-MD5: Password not configured");
+		eap_sm_request_password(sm, config);
+		ret->ignore = TRUE;
+		return NULL;
+	}
+
+	req = (struct eap_hdr *) reqData;
+	pos = (u8 *) (req + 1);
+	if (reqDataLen < sizeof(*req) + 2 || *pos != EAP_TYPE_MD5 ||
+	    (len = be_to_host16(req->length)) > reqDataLen) {
+		wpa_printf(MSG_INFO, "EAP-MD5: Invalid frame");
+		ret->ignore = TRUE;
+		return NULL;
+	}
+	pos++;
+	challenge_len = *pos++;
+	if (challenge_len == 0 ||
+	    challenge_len > len - sizeof(*req) - 2) {
+		wpa_printf(MSG_INFO, "EAP-MD5: Invalid challenge "
+			   "(challenge_len=%d len=%lu",
+			   challenge_len, (unsigned long) len);
+		ret->ignore = TRUE;
+		return NULL;
+	}
+	ret->ignore = FALSE;
+	challenge = pos;
+	wpa_hexdump(MSG_MSGDUMP, "EAP-MD5: Challenge",
+		    challenge, challenge_len);
+
+	wpa_printf(MSG_DEBUG, "EAP-MD5: generating Challenge Response");
+	ret->methodState = METHOD_DONE;
+	ret->decision = DECISION_UNCOND_SUCC;
+	ret->allowNotifications = TRUE;
+
+	*respDataLen = sizeof(struct eap_hdr) + 1 + 1 + MD5_MAC_LEN;
+	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_MD5;
+	*pos++ = MD5_MAC_LEN; /* Value-Size */
+
+	MD5Init(&context);
+	MD5Update(&context, &resp->identifier, 1);
+	MD5Update(&context, config->password, config->password_len);
+	MD5Update(&context, challenge, challenge_len);
+	MD5Final(pos, &context);
+	wpa_hexdump(MSG_MSGDUMP, "EAP-MD5: Response", pos, MD5_MAC_LEN);
+
+	return (u8 *) resp;
+}
+
+
+const struct eap_method eap_method_md5 =
+{
+	.method = EAP_TYPE_MD5,
+	.name = "MD5",
+	.init = eap_md5_init,
+	.deinit = eap_md5_deinit,
+	.process = eap_md5_process,
+};