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
|
/*
* Copyright (c) 1990 - 1994, Julianne Frances Haugh
* Copyright (c) 1996 - 2000, Marek Michałkiewicz
* Copyright (c) 2001 - 2005, Tomasz Kłoczko
* Copyright (c) 2005 - 2008, Nicolas François
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the copyright holders or contributors may not be used to
* endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* is_valid_user_name(), is_valid_group_name() - check the new user/group
* name for validity;
* return values:
* true - OK
* false - bad name
*/
#include <config.h>
#ident "$Id$"
#include <ctype.h>
#include "defines.h"
#include "chkname.h"
int allow_bad_names = false;
static bool is_valid_name (const char *name)
{
if (allow_bad_names) {
return true;
}
/*
* User/group names must match [a-z_][a-z0-9_-]*[$]
*/
if (('\0' == *name) ||
!((('a' <= *name) && ('z' >= *name)) || ('_' == *name))) {
return false;
}
while ('\0' != *++name) {
if (!(( ('a' <= *name) && ('z' >= *name) ) ||
( ('0' <= *name) && ('9' >= *name) ) ||
('_' == *name) ||
('-' == *name) ||
( ('$' == *name) && ('\0' == *(name + 1)) )
)) {
return false;
}
}
return true;
}
bool is_valid_user_name (const char *name)
{
/*
* User names are limited by whatever utmp can
* handle.
*/
if (strlen (name) > USER_NAME_MAX_LENGTH) {
return false;
}
return is_valid_name (name);
}
bool is_valid_group_name (const char *name)
{
/*
* Arbitrary limit for group names.
* HP-UX 10 limits to 16 characters
*/
if ( (GROUP_NAME_MAX_LENGTH > 0)
&& (strlen (name) > GROUP_NAME_MAX_LENGTH)) {
return false;
}
return is_valid_name (name);
}
|
