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subject: ranges of uid, ranges of gid, jail id objects: ranges of uid, ranges of gid, filesystem, object is suid, object is sgid, object matches subject uid/gid object type We can also negate individual conditions. The ruleset language is a superset of the previous language, so old rules should continue to work. These changes require a change to the API between libugidfw and the mac_bsdextended module. Add a version number, so we can tell if we're running mismatched versions. Update man pages to reflect changes, add extra test cases to test_ugidfw.c and add a shell script that checks that the the module seems to do what we expect. Suggestions from: rwatson, trhodes Reviewed by: trhodes MFC after: 2 months
212 lines
5.0 KiB
C
212 lines
5.0 KiB
C
/*-
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* Copyright (c) 2002, 2004 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by NAI Labs, the
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* Security Research Division of Network Associates, Inc. under
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* DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
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* CHATS research program.
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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/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/errno.h>
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#include <sys/mount.h>
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#include <sys/time.h>
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#include <sys/sysctl.h>
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#include <security/mac_bsdextended/mac_bsdextended.h>
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#include <err.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 <ugidfw.h>
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void add_rule(int argc, char *argv[]);
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void list_rules(void);
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void remove_rule(int argc, char *argv[]);
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void set_rule(int argc, char *argv[]);
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void usage(void);
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void
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usage(void)
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{
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fprintf(stderr, "usage: ugidfw add [subject [not] [uid uid] [gid gid]]"
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" [object [not] [uid uid] \\\n");
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fprintf(stderr, " [gid gid]] mode arswxn\n");
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fprintf(stderr, " ugidfw list\n");
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fprintf(stderr, " ugidfw set rulenum [subject [not] [uid uid] [gid gid]]"
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" [object [not] \\\n");
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fprintf(stderr, " [uid uid] [gid gid]] mode arswxn\n");
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fprintf(stderr, " ugidfw remove rulenum\n");
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exit(1);
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}
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void
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add_rule(int argc, char *argv[])
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{
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char errstr[BUFSIZ];
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struct mac_bsdextended_rule rule;
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int error, rulenum;
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error = bsde_parse_rule(argc, argv, &rule, BUFSIZ, errstr);
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if (error) {
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warnx("%s", errstr);
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return;
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}
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error = bsde_add_rule(&rulenum, &rule, BUFSIZ, errstr);
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if (error) {
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warnx("%s", errstr);
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return;
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}
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printf("Added rule %d\n", rulenum);
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}
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void
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list_rules(void)
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{
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char errstr[BUFSIZ], charstr[BUFSIZ];
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struct mac_bsdextended_rule rule;
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int error, i, rule_count, rule_slots;
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rule_slots = bsde_get_rule_slots(BUFSIZ, errstr);
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if (rule_slots == -1) {
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warnx("unable to get rule slots; mac_bsdextended.ko "
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"may not be loaded");
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errx(1, "bsde_get_rule_slots: %s", errstr);
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}
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rule_count = bsde_get_rule_count(BUFSIZ, errstr);
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if (rule_count == -1)
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errx(1, "bsde_get_rule_count: %s", errstr);
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printf("%d slots, %d rules\n", rule_slots, rule_count);
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for (i = 0; i < rule_slots; i++) {
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error = bsde_get_rule(i, &rule, BUFSIZ, errstr);
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switch (error) {
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case -2:
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continue;
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case -1:
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warnx("rule %d: %s", i, errstr);
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continue;
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case 0:
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break;
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}
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if (bsde_rule_to_string(&rule, charstr, BUFSIZ) == -1)
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warnx("unable to translate rule %d to string", i);
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else
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printf("%d %s\n", i, charstr);
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}
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}
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void
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set_rule(int argc, char *argv[])
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{
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char errstr[BUFSIZ];
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struct mac_bsdextended_rule rule;
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long value;
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int error, rulenum;
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char *endp;
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if (argc < 1)
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usage();
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value = strtol(argv[0], &endp, 10);
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if (*endp != '\0')
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usage();
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if ((long) value != (int) value || value < 0)
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usage();
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rulenum = value;
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error = bsde_parse_rule(argc - 1, argv + 1, &rule, BUFSIZ, errstr);
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if (error) {
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warnx("%s", errstr);
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return;
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}
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error = bsde_set_rule(rulenum, &rule, BUFSIZ, errstr);
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if (error) {
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warnx("%s", errstr);
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return;
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}
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}
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void
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remove_rule(int argc, char *argv[])
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{
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char errstr[BUFSIZ];
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long value;
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int error, rulenum;
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char *endp;
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if (argc != 1)
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usage();
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value = strtol(argv[0], &endp, 10);
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if (*endp != '\0')
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usage();
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if ((long) value != (int) value || value < 0)
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usage();
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rulenum = value;
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error = bsde_delete_rule(rulenum, BUFSIZ, errstr);
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if (error)
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warnx("%s", errstr);
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}
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int
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main(int argc, char *argv[])
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{
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if (argc < 2)
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usage();
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if (strcmp("add", argv[1]) == 0) {
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add_rule(argc-2, argv+2);
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} else if (strcmp("list", argv[1]) == 0) {
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if (argc != 2)
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usage();
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list_rules();
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} else if (strcmp("set", argv[1]) == 0) {
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set_rule(argc-2, argv+2);
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} else if (strcmp("remove", argv[1]) == 0) {
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remove_rule(argc-2, argv+2);
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} else
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usage();
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return (0);
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}
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