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1 | /* Copyright (c) 1997-2017 Free Software Foundation, Inc. | |
2 | This file is part of the GNU C Library. | |
3 | Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <string.h> | |
20 | #include <rpcsvc/nis.h> | |
21 | #include <shlib-compat.h> | |
22 | ||
23 | /* internal_nis_ismember () | |
24 | return codes: -1 principal is in -group | |
25 | 0 principal isn't in any group | |
26 | 1 pirncipal is in group */ | |
27 | static int | |
28 | internal_ismember (const_nis_name principal, const_nis_name group) | |
29 | { | |
30 | size_t grouplen = strlen (group); | |
31 | char buf[grouplen + 50]; | |
32 | char leafbuf[grouplen + 2]; | |
33 | char domainbuf[grouplen + 2]; | |
34 | nis_result *res; | |
35 | char *cp, *cp2; | |
36 | u_int i; | |
37 | ||
38 | cp = stpcpy (buf, nis_leaf_of_r (group, leafbuf, sizeof (leafbuf) - 1)); | |
39 | cp = stpcpy (cp, ".groups_dir"); | |
40 | cp2 = nis_domain_of_r (group, domainbuf, sizeof (domainbuf) - 1); | |
41 | if (cp2 != NULL && cp2[0] != '\0') | |
42 | { | |
43 | *cp++ = '.'; | |
44 | strcpy (cp, cp2); | |
45 | } | |
46 | ||
47 | res = nis_lookup (buf, EXPAND_NAME|FOLLOW_LINKS); | |
48 | if (res == NULL || NIS_RES_STATUS (res) != NIS_SUCCESS) | |
49 | { | |
50 | nis_freeresult (res); | |
51 | return 0; | |
52 | } | |
53 | ||
54 | if ((NIS_RES_NUMOBJ (res) != 1) || | |
55 | (__type_of (NIS_RES_OBJECT (res)) != NIS_GROUP_OBJ)) | |
56 | { | |
57 | nis_freeresult (res); | |
58 | return 0; | |
59 | } | |
60 | ||
61 | /* We search twice in the list, at first, if we have the name | |
62 | with a "-", then if without. "-member" has priority */ | |
63 | for (i = 0; i < NIS_RES_OBJECT(res)->GR_data.gr_members.gr_members_len; ++i) | |
64 | { | |
65 | cp = NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val[i]; | |
66 | if (cp[0] == '-') | |
67 | { | |
68 | if (strcmp (&cp[1], principal) == 0) | |
69 | { | |
70 | nis_freeresult (res); | |
71 | return -1; | |
72 | } | |
73 | if (cp[1] == '@') | |
74 | switch (internal_ismember (principal, &cp[2])) | |
75 | { | |
76 | case -1: | |
77 | nis_freeresult (res); | |
78 | return -1; | |
79 | case 1: | |
80 | nis_freeresult (res); | |
81 | return 1; | |
82 | default: | |
83 | break; | |
84 | } | |
85 | else | |
86 | if (cp[1] == '*') | |
87 | { | |
88 | char buf1[strlen (principal) + 2]; | |
89 | char buf2[strlen (cp) + 2]; | |
90 | ||
91 | if (strcmp (nis_domain_of_r (principal, buf1, sizeof buf1), | |
92 | nis_domain_of_r (cp, buf2, sizeof buf2)) == 0) | |
93 | { | |
94 | nis_freeresult (res); | |
95 | return -1; | |
96 | } | |
97 | } | |
98 | } | |
99 | } | |
100 | ||
101 | for (i = 0; i < NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_len; ++i) | |
102 | { | |
103 | cp = NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val[i]; | |
104 | if (cp[0] != '-') | |
105 | { | |
106 | if (strcmp (cp, principal) == 0) | |
107 | { | |
108 | nis_freeresult (res); | |
109 | return 1; | |
110 | } | |
111 | if (cp[0] == '@') | |
112 | switch (internal_ismember (principal, &cp[1])) | |
113 | { | |
114 | case -1: | |
115 | nis_freeresult (res); | |
116 | return -1; | |
117 | case 1: | |
118 | nis_freeresult (res); | |
119 | return 1; | |
120 | default: | |
121 | break; | |
122 | } | |
123 | else | |
124 | if (cp[0] == '*') | |
125 | { | |
126 | char buf1[strlen (principal) + 2]; | |
127 | char buf2[strlen (cp) + 2]; | |
128 | ||
129 | if (strcmp (nis_domain_of_r (principal, buf1, sizeof buf1), | |
130 | nis_domain_of_r (cp, buf2, sizeof buf2)) == 0) | |
131 | { | |
132 | nis_freeresult (res); | |
133 | return 1; | |
134 | } | |
135 | } | |
136 | } | |
137 | } | |
138 | nis_freeresult (res); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | bool_t | |
143 | nis_ismember (const_nis_name principal, const_nis_name group) | |
144 | { | |
145 | if (group != NULL && group[0] != '\0' && principal != NULL) | |
146 | return internal_ismember (principal, group) == 1 ? TRUE : FALSE; | |
147 | else | |
148 | return FALSE; | |
149 | } | |
150 | libnsl_hidden_nolink_def (nis_ismember, GLIBC_2_1) |