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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libradius/radius_msgauth.c	Lines:	40	43	93.0 %
Date:	2017-11-13	Branches:	9	12	75.0 %


/*	$OpenBSD: radius_msgauth.c,v 1.1 2015/07/20 23:52:29 yasuoka Exp $ */

/*-
 * Copyright (c) 2009 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 <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <openssl/hmac.h>

#include "radius.h"

#include "radius_local.h"

static void
radius_calc_message_authenticator(RADIUS_PACKET * packet, const char *secret,
    void *ma)
{
	const RADIUS_ATTRIBUTE	*attr;
	const RADIUS_ATTRIBUTE	*end;
	u_char			 zero16[16];
	HMAC_CTX		 ctx;
	int			 mdlen;

	memset(zero16, 0, sizeof(zero16));

	HMAC_Init(&ctx, secret, strlen(secret), EVP_md5());

	/*
	 * Traverse the radius packet.
	 */
	if (packet->request != NULL) {
		HMAC_Update(&ctx, (const u_char *)packet->pdata, 4);
		HMAC_Update(&ctx, (unsigned char *)packet->request->pdata
		    ->authenticator, 16);
	} else {
		HMAC_Update(&ctx, (const u_char *)packet->pdata,
		    sizeof(RADIUS_PACKET_DATA));
	}

	attr = ATTRS_BEGIN(packet->pdata);
	end = ATTRS_END(packet->pdata);

	for (; attr < end; ATTRS_ADVANCE(attr)) {
		if (attr->type == RADIUS_TYPE_MESSAGE_AUTHENTICATOR) {
			HMAC_Update(&ctx, (u_char *)attr, 2);
			HMAC_Update(&ctx, (u_char *)zero16, sizeof(zero16));
		} else
			HMAC_Update(&ctx, (u_char *)attr, (int) attr->length);
	}

	HMAC_Final(&ctx, (u_char *)ma, &mdlen);

	HMAC_cleanup(&ctx);
}

int
radius_put_message_authenticator(RADIUS_PACKET * packet, const char *secret)
{
	u_char	 ma[16];

	/*
	 * It is not required to initialize ma
	 * because content of Message-Authenticator attribute is assumed zero
	 * during calculation.
	 */
	if (radius_put_raw_attr(packet, RADIUS_TYPE_MESSAGE_AUTHENTICATOR,
		ma, sizeof(ma)) != 0)
		return (-1);

	return (radius_set_message_authenticator(packet, secret));
}

int
radius_set_message_authenticator(RADIUS_PACKET * packet, const char *secret)
{
	u_char	 ma[16];

	radius_calc_message_authenticator(packet, secret, ma);

	return (radius_set_raw_attr(packet, RADIUS_TYPE_MESSAGE_AUTHENTICATOR,
	    ma, sizeof(ma)));
}

int
radius_check_message_authenticator(RADIUS_PACKET * packet, const char *secret)
{
	int	 rval;
	size_t	 len;
	u_char	 ma0[16], ma1[16];

	radius_calc_message_authenticator(packet, secret, ma0);

	len = sizeof(ma1);
	if ((rval = radius_get_raw_attr(packet,
		    RADIUS_TYPE_MESSAGE_AUTHENTICATOR, ma1, &len)) != 0)
		return (rval);

	if (len != sizeof(ma1))
		return (-1);

	return (memcmp(ma0, ma1, sizeof(ma1)));
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: radius_msgauth.c,v 1.1 2015/07/20 23:52:29 yasuoka Exp $ */
2
3			/*-
4			* Copyright (c) 2009 Internet Initiative Japan Inc.
5			* All rights reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that the following conditions
9			* are met:
10			* 1. Redistributions of source code must retain the above copyright
11			* notice, this list of conditions and the following disclaimer.
12			* 2. Redistributions in binary form must reproduce the above copyright
13			* notice, this list of conditions and the following disclaimer in the
14			* documentation and/or other materials provided with the distribution.
15			*
16			* THIS SOFTWARE IS PROVIDED BY THE"AUTHOR" AND CONTRIBUTORS AS IS'' AND
17			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26			* SUCH DAMAGE.
27			*/
28
29			#include <sys/types.h>
30			#include <sys/socket.h>
31			#include <netinet/in.h>
32
33			#include <stdbool.h>
34			#include <stdio.h>
35			#include <stdlib.h>
36			#include <string.h>
37
38			#include <openssl/hmac.h>
39
40			#include "radius.h"
41
42			#include "radius_local.h"
43
44			static void
45			radius_calc_message_authenticator(RADIUS_PACKET * packet, const char *secret,
46			void *ma)
47			{
48			const RADIUS_ATTRIBUTE *attr;
49			const RADIUS_ATTRIBUTE *end;
50		42	u_char zero16[16];
51		21	HMAC_CTX ctx;
52		21	int mdlen;
53
54		21	memset(zero16, 0, sizeof(zero16));
55
56		21	HMAC_Init(&ctx, secret, strlen(secret), EVP_md5());
57
58			/*
59			* Traverse the radius packet.
60			*/
61	✓✓	21	if (packet->request != NULL) {
62		9	HMAC_Update(&ctx, (const u_char *)packet->pdata, 4);
63		18	HMAC_Update(&ctx, (unsigned char *)packet->request->pdata
64		9	->authenticator, 16);
65		9	} else {
66		12	HMAC_Update(&ctx, (const u_char *)packet->pdata,
67			sizeof(RADIUS_PACKET_DATA));
68			}
69
70		21	attr = ATTRS_BEGIN(packet->pdata);
71		21	end = ATTRS_END(packet->pdata);
72
73	✓✓	126	for (; attr < end; ATTRS_ADVANCE(attr)) {
74	✓✓	42	if (attr->type == RADIUS_TYPE_MESSAGE_AUTHENTICATOR) {
75		21	HMAC_Update(&ctx, (u_char *)attr, 2);
76		21	HMAC_Update(&ctx, (u_char *)zero16, sizeof(zero16));
77		21	} else
78		21	HMAC_Update(&ctx, (u_char *)attr, (int) attr->length);
79			}
80
81		21	HMAC_Final(&ctx, (u_char *)ma, &mdlen);
82
83		21	HMAC_cleanup(&ctx);
84		21	}
85
86			int
87			radius_put_message_authenticator(RADIUS_PACKET * packet, const char *secret)
88			{
89		12	u_char ma[16];
90
91			/*
92			* It is not required to initialize ma
93			* because content of Message-Authenticator attribute is assumed zero
94			* during calculation.
95			*/
96	✗✓	12	if (radius_put_raw_attr(packet, RADIUS_TYPE_MESSAGE_AUTHENTICATOR,
97		12	ma, sizeof(ma)) != 0)
98			return (-1);
99
100		6	return (radius_set_message_authenticator(packet, secret));
101		6	}
102
103			int
104			radius_set_message_authenticator(RADIUS_PACKET * packet, const char *secret)
105			{
106		18	u_char ma[16];
107
108		9	radius_calc_message_authenticator(packet, secret, ma);
109
110		18	return (radius_set_raw_attr(packet, RADIUS_TYPE_MESSAGE_AUTHENTICATOR,
111			ma, sizeof(ma)));
112		9	}
113
114			int
115			radius_check_message_authenticator(RADIUS_PACKET * packet, const char *secret)
116			{
117			int rval;
118		24	size_t len;
119		12	u_char ma0[16], ma1[16];
120
121		12	radius_calc_message_authenticator(packet, secret, ma0);
122
123		12	len = sizeof(ma1);
124	✗✓	24	if ((rval = radius_get_raw_attr(packet,
125		24	RADIUS_TYPE_MESSAGE_AUTHENTICATOR, ma1, &len)) != 0)
126			return (rval);
127
128	✗✓	12	if (len != sizeof(ma1))
129			return (-1);
130
131		12	return (memcmp(ma0, ma1, sizeof(ma1)));
132		12	}