3704745289
default to 32. * libmisc/chkname.c: Use USER_NAME_MAX_LENGTH. * src/login.c: Use USER_NAME_MAX_LENGTH instead of the default 32. username also needs to be bigger than USER_NAME_MAX_LENGTH because it has to be nul-terminated.
105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/*
|
|
* 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"
|
|
#if HAVE_UTMPX_H
|
|
#include <utmpx.h>
|
|
#else
|
|
#include <utmp.h>
|
|
#endif
|
|
|
|
static bool is_valid_name (const char *name)
|
|
{
|
|
/*
|
|
* 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);
|
|
}
|
|
|