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1/*
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"
26
27#include "groupaccess.h"
28#include "ssh.h"
29#include "xmalloc.h"
30#include "match.h"
31
32static int ngroups;
33static char *groups_byname[NGROUPS_MAX + 1]; /* +1 for base/primary group */
34
35int
36ga_init(const char *user, gid_t base)
37{
38 gid_t groups_bygid[NGROUPS_MAX + 1];
39 int i, j;
40 struct group *gr;
41
42 if (ngroups > 0)
43 ga_free();
44
45 ngroups = sizeof(groups_bygid) / sizeof(gid_t);
46 if (getgrouplist(user, base, groups_bygid, &ngroups) == -1)
47 log("getgrouplist: groups list too small");
48 for (i = 0, j = 0; i < ngroups; i++)
49 if ((gr = getgrgid(groups_bygid[i])) != NULL)
50 groups_byname[j++] = xstrdup(gr->gr_name);
51 return (ngroups = j);
52}
53
54int
55ga_match(char * const *groups, int n)
56{
57 int i, j;
58
59 for (i = 0; i < ngroups; i++)
60 for (j = 0; j < n; j++)
61 if (match_pattern(groups_byname[i], groups[j]))
62 return 1;
63 return 0;
64}
65
66void
67ga_free(void)
68{
69 int i;
70
71 if (ngroups > 0) {
72 for (i = 0; i < ngroups; i++)
73 xfree(groups_byname[i]);
74 ngroups = 0;
75 }
76}