ugidfw.c revision 157986 
1/*-
2 * Copyright (c) 2002, 2004 Networks Associates Technology, Inc.
3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project by NAI Labs, the
6 * Security Research Division of Network Associates, Inc. under
7 * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
8 * CHATS research program.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD: head/usr.sbin/ugidfw/ugidfw.c 157986 2006-04-23 17:06:18Z dwmalone $");
34
35#include <sys/param.h>
36#include <sys/errno.h>
37#include <sys/mount.h>
38#include <sys/time.h>
39#include <sys/sysctl.h>
40
41#include <security/mac_bsdextended/mac_bsdextended.h>
42
43#include <err.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <string.h>
47#include <ugidfw.h>
48
49void add_rule(int argc, char *argv[]);
50void list_rules(void);
51void remove_rule(int argc, char *argv[]);
52void set_rule(int argc, char *argv[]);
53void usage(void);
54
55void
56usage(void)
57{
58
59	fprintf(stderr, "usage: ugidfw add [subject [not] [uid uid] [gid gid]]"
60	    " [object [not] [uid uid] \\\n");
61	fprintf(stderr, "    [gid gid]] mode arswxn\n");
62	fprintf(stderr, "       ugidfw list\n");
63	fprintf(stderr, "       ugidfw set rulenum [subject [not] [uid uid] [gid gid]]"
64	    " [object [not] \\\n");
65	fprintf(stderr, "    [uid uid] [gid gid]] mode arswxn\n");
66	fprintf(stderr, "       ugidfw remove rulenum\n");
67
68	exit(1);
69}
70
71void
72add_rule(int argc, char *argv[])
73{
74	char errstr[BUFSIZ];
75	struct mac_bsdextended_rule rule;
76	int error, rulenum;
77
78	error = bsde_parse_rule(argc, argv, &rule, BUFSIZ, errstr);
79	if (error) {
80		warnx("%s", errstr);
81		return;
82	}
83
84	error = bsde_add_rule(&rulenum, &rule, BUFSIZ, errstr);
85	if (error) {
86		warnx("%s", errstr);
87		return;
88	}
89	printf("Added rule %d\n", rulenum);
90}
91
92void
93list_rules(void)
94{
95	char errstr[BUFSIZ], charstr[BUFSIZ];
96	struct mac_bsdextended_rule rule;
97	int error, i, rule_count, rule_slots;
98
99	rule_slots = bsde_get_rule_slots(BUFSIZ, errstr);
100	if (rule_slots == -1) {
101		warnx("unable to get rule slots; mac_bsdextended.ko "
102		    "may not be loaded");
103		errx(1, "bsde_get_rule_slots: %s", errstr);
104	}
105
106	rule_count = bsde_get_rule_count(BUFSIZ, errstr);
107	if (rule_count == -1)
108		errx(1, "bsde_get_rule_count: %s", errstr);
109
110	printf("%d slots, %d rules\n", rule_slots, rule_count);
111
112	for (i = 0; i < rule_slots; i++) {
113		error = bsde_get_rule(i, &rule, BUFSIZ, errstr);
114		switch (error) {
115		case -2:
116			continue;
117		case -1:
118			warnx("rule %d: %s", i, errstr);
119			continue;
120		case 0:
121			break;
122		}
123
124		if (bsde_rule_to_string(&rule, charstr, BUFSIZ) == -1)
125			warnx("unable to translate rule %d to string", i);
126		else
127			printf("%d %s\n", i, charstr);
128	}
129}
130
131void
132set_rule(int argc, char *argv[])
133{
134	char errstr[BUFSIZ];
135	struct mac_bsdextended_rule rule;
136	long value;
137	int error, rulenum;
138	char *endp;
139
140	if (argc < 1)
141		usage();
142
143	value = strtol(argv[0], &endp, 10);
144	if (*endp != '\0')
145		usage();
146
147	if ((long) value != (int) value || value < 0)
148		usage();
149
150	rulenum = value;
151
152	error = bsde_parse_rule(argc - 1, argv + 1, &rule, BUFSIZ, errstr);
153	if (error) {
154		warnx("%s", errstr);
155		return;
156	}
157
158	error = bsde_set_rule(rulenum, &rule, BUFSIZ, errstr);
159	if (error) {
160		warnx("%s", errstr);
161		return;
162	}
163}
164
165void
166remove_rule(int argc, char *argv[])
167{
168	char errstr[BUFSIZ];
169	long value;
170	int error, rulenum;
171	char *endp;
172
173	if (argc != 1)
174		usage();
175
176	value = strtol(argv[0], &endp, 10);
177	if (*endp != '\0')
178		usage();
179
180	if ((long) value != (int) value || value < 0)
181		usage();
182
183	rulenum = value;
184
185	error = bsde_delete_rule(rulenum, BUFSIZ, errstr);
186	if (error)
187		warnx("%s", errstr);
188}
189
190int
191main(int argc, char *argv[])
192{
193
194	if (argc < 2)
195		usage();
196
197	if (strcmp("add", argv[1]) == 0) {
198		add_rule(argc-2, argv+2);
199	} else if (strcmp("list", argv[1]) == 0) {
200		if (argc != 2)
201			usage();
202		list_rules();
203	} else if (strcmp("set", argv[1]) == 0) {
204		set_rule(argc-2, argv+2);
205	} else if (strcmp("remove", argv[1]) == 0) {
206		remove_rule(argc-2, argv+2);
207	} else
208		usage();
209
210	return (0);
211}
212