blob: 66dfa68fe1f86868e8b6ff9bdf9abbdab89b8ca7 [file] [log] [blame]
Kevin Steves886b06c2001-01-14 00:35:19 +00001/*
2 * Copyright (c) 2001 Kevin Steves. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#include "includes.h"
Ben Lindstrom05764b92002-03-05 01:53:02 +000026RCSID("$OpenBSD: groupaccess.c,v 1.5 2002/03/04 17:27:39 stevesk Exp $");
Kevin Steves886b06c2001-01-14 00:35:19 +000027
28#include "groupaccess.h"
Kevin Steves886b06c2001-01-14 00:35:19 +000029#include "xmalloc.h"
30#include "match.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000031#include "log.h"
Kevin Steves886b06c2001-01-14 00:35:19 +000032
33static int ngroups;
34static char *groups_byname[NGROUPS_MAX + 1]; /* +1 for base/primary group */
35
Ben Lindstrom4cc240d2001-07-04 04:46:56 +000036/*
37 * Initialize group access list for user with primary (base) and
38 * supplementary groups. Return the number of groups in the list.
39 */
Kevin Steves886b06c2001-01-14 00:35:19 +000040int
41ga_init(const char *user, gid_t base)
42{
43 gid_t groups_bygid[NGROUPS_MAX + 1];
44 int i, j;
45 struct group *gr;
46
47 if (ngroups > 0)
48 ga_free();
49
50 ngroups = sizeof(groups_bygid) / sizeof(gid_t);
51 if (getgrouplist(user, base, groups_bygid, &ngroups) == -1)
52 log("getgrouplist: groups list too small");
53 for (i = 0, j = 0; i < ngroups; i++)
54 if ((gr = getgrgid(groups_bygid[i])) != NULL)
55 groups_byname[j++] = xstrdup(gr->gr_name);
56 return (ngroups = j);
57}
58
Ben Lindstrom4cc240d2001-07-04 04:46:56 +000059/*
60 * Return 1 if one of user's groups is contained in groups.
61 * Return 0 otherwise. Use match_pattern() for string comparison.
62 */
Kevin Steves886b06c2001-01-14 00:35:19 +000063int
64ga_match(char * const *groups, int n)
65{
66 int i, j;
67
68 for (i = 0; i < ngroups; i++)
69 for (j = 0; j < n; j++)
70 if (match_pattern(groups_byname[i], groups[j]))
71 return 1;
72 return 0;
73}
74
Ben Lindstrom4cc240d2001-07-04 04:46:56 +000075/*
76 * Free memory allocated for group access list.
77 */
Kevin Steves886b06c2001-01-14 00:35:19 +000078void
79ga_free(void)
80{
81 int i;
82
83 if (ngroups > 0) {
84 for (i = 0; i < ngroups; i++)
85 xfree(groups_byname[i]);
86 ngroups = 0;
87 }
88}