1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/* $OpenBSD: radius_eapmsk.c,v 1.3 2024/02/09 11:59:23 yasuoka Exp $ */
/*-
* Copyright (c) 2013 Internet Initiative Japan Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE"AUTHOR" AND CONTRIBUTORS AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <stdint.h>
#include <string.h>
#include "radius.h"
#include "radius_local.h"
int
radius_get_eap_msk(const RADIUS_PACKET * packet, void *buf, size_t *len,
const char *secret)
{
uint8_t buf0[256];
uint8_t buf1[256];
size_t len0, len1, msklen;
/* RFC 3748 defines the MSK minimum size is 64 bytes */
if (*len < 64)
return (-1);
len0 = sizeof(buf0);
len1 = sizeof(buf1);
if (radius_get_mppe_recv_key_attr(packet, buf0, &len0, secret) == 0 &&
radius_get_mppe_send_key_attr(packet, buf1, &len1, secret) == 0) {
/* addition cannot overflow since len{0,1} are limited to 256 */
msklen = len0 + len1;
if (msklen > *len)
return (-1); /* not enougth */
memcpy(buf, buf0, len0);
memcpy(((char *)buf) + len0, buf1, len1);
/* zero padding to the minimum size, 64 bytes. */
if (msklen < 64) {
memset(((char *)buf) + msklen, 0, 64 - msklen);
msklen = 64;
}
*len = msklen;
return (0);
}
return (-1);
}
|
