Annotation of src/usr.bin/ssh/groupaccess.c, Revision 1.4
1.4 ! markus 1: /* $OpenBSD: groupaccess.c,v 1.3 2001/01/29 01:58:15 niklas Exp $ */
1.3 niklas 2:
1.1 markus 3: /*
4: * Copyright (c) 2001 Kevin Steves. All rights reserved.
5: *
6: * Redistribution and use in source and binary forms, with or without
7: * modification, are permitted provided that the following conditions
8: * are met:
9: * 1. Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: * 2. Redistributions in binary form must reproduce the above copyright
12: * notice, this list of conditions and the following disclaimer in the
13: * documentation and/or other materials provided with the distribution.
14: *
15: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27: #include "includes.h"
28:
29: #include "groupaccess.h"
30: #include "xmalloc.h"
31: #include "match.h"
1.2 markus 32: #include "log.h"
1.1 markus 33:
34: static int ngroups;
35: static char *groups_byname[NGROUPS_MAX + 1]; /* +1 for base/primary group */
36:
1.4 ! markus 37: /*
! 38: * Initialize group access list for user with primary (base) and
! 39: * supplementary groups. Return the number of groups in the list.
! 40: */
1.1 markus 41: int
42: ga_init(const char *user, gid_t base)
43: {
44: gid_t groups_bygid[NGROUPS_MAX + 1];
45: int i, j;
46: struct group *gr;
47:
48: if (ngroups > 0)
49: ga_free();
50:
51: ngroups = sizeof(groups_bygid) / sizeof(gid_t);
52: if (getgrouplist(user, base, groups_bygid, &ngroups) == -1)
53: log("getgrouplist: groups list too small");
54: for (i = 0, j = 0; i < ngroups; i++)
55: if ((gr = getgrgid(groups_bygid[i])) != NULL)
56: groups_byname[j++] = xstrdup(gr->gr_name);
57: return (ngroups = j);
58: }
59:
1.4 ! markus 60: /*
! 61: * Return 1 if one of user's groups is contained in groups.
! 62: * Return 0 otherwise. Use match_pattern() for string comparison.
! 63: */
1.1 markus 64: int
65: ga_match(char * const *groups, int n)
66: {
67: int i, j;
68:
69: for (i = 0; i < ngroups; i++)
70: for (j = 0; j < n; j++)
71: if (match_pattern(groups_byname[i], groups[j]))
72: return 1;
73: return 0;
74: }
75:
1.4 ! markus 76: /*
! 77: * Free memory allocated for group access list.
! 78: */
1.1 markus 79: void
80: ga_free(void)
81: {
82: int i;
83:
84: if (ngroups > 0) {
85: for (i = 0; i < ngroups; i++)
86: xfree(groups_byname[i]);
87: ngroups = 0;
88: }
89: }