1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/* Copyright (c) 1997-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <string.h>
#include <rpcsvc/nis.h>
#include <shlib-compat.h>
/* internal_nis_ismember ()
return codes: -1 principal is in -group
0 principal isn't in any group
1 pirncipal is in group */
static int
internal_ismember (const_nis_name principal, const_nis_name group)
{
size_t grouplen = strlen (group);
char buf[grouplen + 50];
char leafbuf[grouplen + 2];
char domainbuf[grouplen + 2];
nis_result *res;
char *cp, *cp2;
u_int i;
cp = stpcpy (buf, nis_leaf_of_r (group, leafbuf, sizeof (leafbuf) - 1));
cp = stpcpy (cp, ".groups_dir");
cp2 = nis_domain_of_r (group, domainbuf, sizeof (domainbuf) - 1);
if (cp2 != NULL && cp2[0] != '\0')
{
*cp++ = '.';
strcpy (cp, cp2);
}
res = nis_lookup (buf, EXPAND_NAME|FOLLOW_LINKS);
if (res == NULL || NIS_RES_STATUS (res) != NIS_SUCCESS)
{
nis_freeresult (res);
return 0;
}
if ((NIS_RES_NUMOBJ (res) != 1) ||
(__type_of (NIS_RES_OBJECT (res)) != NIS_GROUP_OBJ))
{
nis_freeresult (res);
return 0;
}
/* We search twice in the list, at first, if we have the name
with a "-", then if without. "-member" has priority */
for (i = 0; i < NIS_RES_OBJECT(res)->GR_data.gr_members.gr_members_len; ++i)
{
cp = NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val[i];
if (cp[0] == '-')
{
if (strcmp (&cp[1], principal) == 0)
{
nis_freeresult (res);
return -1;
}
if (cp[1] == '@')
switch (internal_ismember (principal, &cp[2]))
{
case -1:
nis_freeresult (res);
return -1;
case 1:
nis_freeresult (res);
return 1;
default:
break;
}
else
if (cp[1] == '*')
{
char buf1[strlen (principal) + 2];
char buf2[strlen (cp) + 2];
if (strcmp (nis_domain_of_r (principal, buf1, sizeof buf1),
nis_domain_of_r (cp, buf2, sizeof buf2)) == 0)
{
nis_freeresult (res);
return -1;
}
}
}
}
for (i = 0; i < NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_len; ++i)
{
cp = NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val[i];
if (cp[0] != '-')
{
if (strcmp (cp, principal) == 0)
{
nis_freeresult (res);
return 1;
}
if (cp[0] == '@')
switch (internal_ismember (principal, &cp[1]))
{
case -1:
nis_freeresult (res);
return -1;
case 1:
nis_freeresult (res);
return 1;
default:
break;
}
else
if (cp[0] == '*')
{
char buf1[strlen (principal) + 2];
char buf2[strlen (cp) + 2];
if (strcmp (nis_domain_of_r (principal, buf1, sizeof buf1),
nis_domain_of_r (cp, buf2, sizeof buf2)) == 0)
{
nis_freeresult (res);
return 1;
}
}
}
}
nis_freeresult (res);
return 0;
}
bool_t
nis_ismember (const_nis_name principal, const_nis_name group)
{
if (group != NULL && group[0] != '\0' && principal != NULL)
return internal_ismember (principal, group) == 1 ? TRUE : FALSE;
else
return FALSE;
}
libnsl_hidden_nolink_def (nis_ismember, GLIBC_2_1)
|