X-Git-Url: http://www.project-moonshot.org/gitweb/?a=blobdiff_plain;f=libeap%2Fsrc%2Feap_peer%2Feap_md5.c;fp=libeap%2Fsrc%2Feap_peer%2Feap_md5.c;h=0edbae8f74d378d54c5f8564472e5c4338257452;hb=fa210a112d16848a282d662f16f9b8589dd371df;hp=0000000000000000000000000000000000000000;hpb=a3d666260a9b578b9ad6f7ffd15671530ec632d9;p=mech_eap.orig

diff --git a/libeap/src/eap_peer/eap_md5.c b/libeap/src/eap_peer/eap_md5.c
new file mode 100644
index 0000000..0edbae8
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+++ b/libeap/src/eap_peer/eap_md5.c
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+/*
+ * EAP peer method: EAP-MD5 (RFC 3748 and RFC 1994)
+ * Copyright (c) 2004-2006, Jouni Malinen <j@w1.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 "includes.h"
+
+#include "common.h"
+#include "eap_i.h"
+#include "eap_common/chap.h"
+
+
+static void * eap_md5_init(struct eap_sm *sm)
+{
+	/* No need for private data. However, must return non-NULL to indicate
+	 * success. */
+	return (void *) 1;
+}
+
+
+static void eap_md5_deinit(struct eap_sm *sm, void *priv)
+{
+}
+
+
+static struct wpabuf * eap_md5_process(struct eap_sm *sm, void *priv,
+				       struct eap_method_ret *ret,
+				       const struct wpabuf *reqData)
+{
+	struct wpabuf *resp;
+	const u8 *pos, *challenge, *password;
+	u8 *rpos, id;
+	size_t len, challenge_len, password_len;
+
+	password = eap_get_config_password(sm, &password_len);
+	if (password == NULL) {
+		wpa_printf(MSG_INFO, "EAP-MD5: Password not configured");
+		eap_sm_request_password(sm);
+		ret->ignore = TRUE;
+		return NULL;
+	}
+
+	pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_MD5, reqData, &len);
+	if (pos == NULL || len == 0) {
+		wpa_printf(MSG_INFO, "EAP-MD5: Invalid frame (pos=%p len=%lu)",
+			   pos, (unsigned long) len);
+		ret->ignore = TRUE;
+		return NULL;
+	}
+
+	/*
+	 * CHAP Challenge:
+	 * Value-Size (1 octet) | Value(Challenge) | Name(optional)
+	 */
+	challenge_len = *pos++;
+	if (challenge_len == 0 || challenge_len > len - 1) {
+		wpa_printf(MSG_INFO, "EAP-MD5: Invalid challenge "
+			   "(challenge_len=%lu len=%lu)",
+			   (unsigned long) 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_COND_SUCC;
+	ret->allowNotifications = TRUE;
+
+	resp = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_MD5, 1 + CHAP_MD5_LEN,
+			     EAP_CODE_RESPONSE, eap_get_id(reqData));
+	if (resp == NULL)
+		return NULL;
+
+	/*
+	 * CHAP Response:
+	 * Value-Size (1 octet) | Value(Response) | Name(optional)
+	 */
+	wpabuf_put_u8(resp, CHAP_MD5_LEN);
+
+	id = eap_get_id(resp);
+	rpos = wpabuf_put(resp, CHAP_MD5_LEN);
+	chap_md5(id, password, password_len, challenge, challenge_len, rpos);
+	wpa_hexdump(MSG_MSGDUMP, "EAP-MD5: Response", rpos, CHAP_MD5_LEN);
+
+	return resp;
+}
+
+
+int eap_peer_md5_register(void)
+{
+	struct eap_method *eap;
+	int ret;
+
+	eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
+				    EAP_VENDOR_IETF, EAP_TYPE_MD5, "MD5");
+	if (eap == NULL)
+		return -1;
+
+	eap->init = eap_md5_init;
+	eap->deinit = eap_md5_deinit;
+	eap->process = eap_md5_process;
+
+	ret = eap_peer_method_register(eap);
+	if (ret)
+		eap_peer_method_free(eap);
+	return ret;
+}