68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/* $OpenBSD: radius_eapmsk.c,v 1.3 2024/02/09 11:59:23 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 <stdint.h>
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#include <string.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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uint8_t buf0[256];
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uint8_t buf1[256];
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size_t len0, len1, msklen;
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/* RFC 3748 defines the MSK minimum size is 64 bytes */
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if (*len < 64)
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return (-1);
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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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/* addition cannot overflow since len{0,1} are limited to 256 */
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msklen = len0 + len1;
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if (msklen > *len)
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return (-1); /* not enougth */
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memcpy(buf, buf0, len0);
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memcpy(((char *)buf) + len0, buf1, len1);
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/* zero padding to the minimum size, 64 bytes. */
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if (msklen < 64) {
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memset(((char *)buf) + msklen, 0, 64 - msklen);
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msklen = 64;
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}
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*len = msklen;
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return (0);
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}
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return (-1);
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}
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