GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libradius/radius_eapmsk.c Lines: 0 17 0.0 %
Date: 2017-11-13 Branches: 0 8 0.0 %

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/*	$OpenBSD: radius_eapmsk.c,v 1.1 2015/07/20 23:52:29 yasuoka Exp $ */
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/*-
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 * Copyright (c) 2013 Internet Initiative Japan Inc.
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE"AUTHOR" AND CONTRIBUTORS AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/md5.h>
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#include "radius.h"
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#include "radius_local.h"
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int
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radius_get_eap_msk(const RADIUS_PACKET * packet, void *buf, size_t * len,
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    const char *secret)
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{
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	/*
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	 * Unfortunately, the way to pass EAP MSK/EMSK over RADIUS
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	 * is not standardized.
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	 */
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	uint8_t	 buf0[256];
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	uint8_t	 buf1[256];
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	size_t	 len0, len1;
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	/*
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	 * EAP MSK via MPPE keys
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	 *
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	 * MSK = MPPE-Recv-Key + MPPE-Send-Key + 32byte zeros
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	 * http://msdn.microsoft.com/en-us/library/cc224635.aspx
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	 */
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	len0 = sizeof(buf0);
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	len1 = sizeof(buf1);
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	if (radius_get_mppe_recv_key_attr(packet, buf0, &len0, secret) == 0 &&
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	    radius_get_mppe_send_key_attr(packet, buf1, &len1, secret) == 0) {
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		if (len0 < 16 || len1 < 16)
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			return (-1);
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		if (*len < 64)
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			return (-1);
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		memcpy(buf, buf0, 16);
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		memcpy(((char *)buf) + 16, buf1, 16);
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		memset(((char *)buf) + 32, 0, 32);
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		*len = 64;
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		return (0);
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	}
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	return (-1);
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}