1 /* Test for processing of invalid gshadow entries. [BZ #18724]
2 Copyright (C) 2015-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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 <https://www.gnu.org/licenses/>. */
18
19 #include <errno.h>
20 #include <gshadow.h>
21 #include <stdbool.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25
26 static bool errors;
27
28 static void
check(struct sgrp e,const char * expected)29 check (struct sgrp e, const char *expected)
30 {
31 char *buf;
32 size_t buf_size;
33 FILE *f = open_memstream (&buf, &buf_size);
34
35 if (f == NULL)
36 {
37 printf ("open_memstream: %m\n");
38 errors = true;
39 return;
40 }
41
42 int ret = putsgent (&e, f);
43
44 if (expected == NULL)
45 {
46 if (ret == -1)
47 {
48 if (errno != EINVAL)
49 {
50 printf ("putsgent: unexpected error code: %m\n");
51 errors = true;
52 }
53 }
54 else
55 {
56 printf ("putsgent: unexpected success (\"%s\")\n", e.sg_namp);
57 errors = true;
58 }
59 }
60 else
61 {
62 /* Expect success. */
63 size_t expected_length = strlen (expected);
64 if (ret == 0)
65 {
66 long written = ftell (f);
67
68 if (written <= 0 || fflush (f) < 0)
69 {
70 printf ("stream error: %m\n");
71 errors = true;
72 }
73 else if (buf[written - 1] != '\n')
74 {
75 printf ("FAILED: \"%s\" without newline\n", expected);
76 errors = true;
77 }
78 else if (strncmp (buf, expected, written - 1) != 0
79 || written - 1 != expected_length)
80 {
81 printf ("FAILED: \"%s\" (%ld), expected \"%s\" (%zu)\n",
82 buf, written - 1, expected, expected_length);
83 errors = true;
84 }
85 }
86 else
87 {
88 printf ("FAILED: putsgent (expected \"%s\"): %m\n", expected);
89 errors = true;
90 }
91 }
92
93 fclose (f);
94 free (buf);
95 }
96
97 static int
do_test(void)98 do_test (void)
99 {
100 check ((struct sgrp) {
101 .sg_namp = (char *) "root",
102 },
103 "root:::");
104 check ((struct sgrp) {
105 .sg_namp = (char *) "root",
106 .sg_passwd = (char *) "password",
107 },
108 "root:password::");
109 check ((struct sgrp) {
110 .sg_namp = (char *) "root",
111 .sg_passwd = (char *) "password",
112 .sg_adm = (char *[]) {(char *) "adm1", (char *) "adm2", NULL},
113 .sg_mem = (char *[]) {(char *) "mem1", (char *) "mem2", NULL},
114 },
115 "root:password:adm1,adm2:mem1,mem2");
116
117 /* Bad values. */
118 {
119 static const char *const bad_strings[] = {
120 ":",
121 "\n",
122 ":bad",
123 "\nbad",
124 "b:ad",
125 "b\nad",
126 "bad:",
127 "bad\n",
128 "b:a\nd",
129 ",",
130 "\n,",
131 ":,",
132 ",bad",
133 "b,ad",
134 "bad,",
135 NULL
136 };
137 for (const char *const *bad = bad_strings; *bad != NULL; ++bad)
138 {
139 char *members[]
140 = {(char *) "first", (char *) *bad, (char *) "last", NULL};
141 if (strpbrk (*bad, ":\n") != NULL)
142 {
143 check ((struct sgrp) {
144 .sg_namp = (char *) *bad,
145 }, NULL);
146 check ((struct sgrp) {
147 .sg_namp = (char *) "root",
148 .sg_passwd = (char *) *bad,
149 }, NULL);
150 }
151 check ((struct sgrp) {
152 .sg_namp = (char *) "root",
153 .sg_passwd = (char *) "password",
154 .sg_adm = members
155 }, NULL);
156 check ((struct sgrp) {
157 .sg_namp = (char *) "root",
158 .sg_passwd = (char *) "password",
159 .sg_mem = members
160 }, NULL);
161 }
162 }
163
164 return errors;
165 }
166
167 #define TEST_FUNCTION do_test ()
168 #include "../test-skeleton.c"
169