fdc9b60daf
other than the current system-wide size (32-bits) has been updated so for now just cautiously turn the check off. While here fix the check for IDs being too large which doesn't work due to type mis-matches. Reviewed by: jhb (previous version) Approved by: re (kib) MFC after: 1 month (type mis-match fixes only)
213 lines
6.0 KiB
C
213 lines
6.0 KiB
C
/*-
|
|
* Copyright (c) 1990, 1993, 1994
|
|
* The Regents of the University of California. 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.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char sccsid[] = "@(#)pw_scan.c 8.3 (Berkeley) 4/2/94";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* This module is used to "verify" password entries by chpass(1) and
|
|
* pwd_mkdb(8).
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <pwd.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "pw_scan.h"
|
|
|
|
/*
|
|
* Some software assumes that IDs are short. We should emit warnings
|
|
* for id's which cannot be stored in a short, but we are more liberal
|
|
* by default, warning for IDs greater than USHRT_MAX.
|
|
*
|
|
* If pw_big_ids_warning is -1 on entry to pw_scan(), it will be set based
|
|
* on the existence of PW_SCAN_BIG_IDS in the environment.
|
|
*
|
|
* It is believed all baseline system software that can not handle the
|
|
* normal ID sizes is now gone so pw_big_ids_warning is disabled for now.
|
|
* But the code has been left in place in case end-users want to re-enable
|
|
* it and/or for the next time the ID sizes get bigger but pieces of the
|
|
* system lag behind.
|
|
*/
|
|
static int pw_big_ids_warning = 0;
|
|
|
|
int
|
|
__pw_scan(char *bp, struct passwd *pw, int flags)
|
|
{
|
|
uid_t id;
|
|
int root;
|
|
char *ep, *p, *sh;
|
|
unsigned long temp;
|
|
|
|
if (pw_big_ids_warning == -1)
|
|
pw_big_ids_warning = getenv("PW_SCAN_BIG_IDS") == NULL ? 1 : 0;
|
|
|
|
pw->pw_fields = 0;
|
|
if (!(pw->pw_name = strsep(&bp, ":"))) /* login */
|
|
goto fmt;
|
|
root = !strcmp(pw->pw_name, "root");
|
|
if (pw->pw_name[0] && (pw->pw_name[0] != '+' || pw->pw_name[1] == '\0'))
|
|
pw->pw_fields |= _PWF_NAME;
|
|
|
|
if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */
|
|
goto fmt;
|
|
if (pw->pw_passwd[0])
|
|
pw->pw_fields |= _PWF_PASSWD;
|
|
|
|
if (!(p = strsep(&bp, ":"))) /* uid */
|
|
goto fmt;
|
|
if (p[0])
|
|
pw->pw_fields |= _PWF_UID;
|
|
else {
|
|
if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
|
|
if (flags & _PWSCAN_WARN)
|
|
warnx("no uid for user %s", pw->pw_name);
|
|
return (0);
|
|
}
|
|
}
|
|
errno = 0;
|
|
temp = strtoul(p, &ep, 10);
|
|
if ((temp == ULONG_MAX && errno == ERANGE) || temp > UID_MAX) {
|
|
if (flags & _PWSCAN_WARN)
|
|
warnx("%s > max uid value (%u)", p, UID_MAX);
|
|
return (0);
|
|
}
|
|
id = temp;
|
|
if (*ep != '\0') {
|
|
if (flags & _PWSCAN_WARN)
|
|
warnx("%s uid is incorrect", p);
|
|
return (0);
|
|
}
|
|
if (root && id) {
|
|
if (flags & _PWSCAN_WARN)
|
|
warnx("root uid should be 0");
|
|
return (0);
|
|
}
|
|
if (flags & _PWSCAN_WARN && pw_big_ids_warning && id > USHRT_MAX) {
|
|
warnx("%s > recommended max uid value (%u)", p, USHRT_MAX);
|
|
/*return (0);*/ /* THIS SHOULD NOT BE FATAL! */
|
|
}
|
|
pw->pw_uid = id;
|
|
|
|
if (!(p = strsep(&bp, ":"))) /* gid */
|
|
goto fmt;
|
|
if (p[0])
|
|
pw->pw_fields |= _PWF_GID;
|
|
else {
|
|
if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
|
|
if (flags & _PWSCAN_WARN)
|
|
warnx("no gid for user %s", pw->pw_name);
|
|
return (0);
|
|
}
|
|
}
|
|
errno = 0;
|
|
temp = strtoul(p, &ep, 10);
|
|
if ((temp == ULONG_MAX && errno == ERANGE) || temp > GID_MAX) {
|
|
if (flags & _PWSCAN_WARN)
|
|
warnx("%s > max gid value (%u)", p, GID_MAX);
|
|
return (0);
|
|
}
|
|
id = temp;
|
|
if (*ep != '\0') {
|
|
if (flags & _PWSCAN_WARN)
|
|
warnx("%s gid is incorrect", p);
|
|
return (0);
|
|
}
|
|
if (flags & _PWSCAN_WARN && pw_big_ids_warning && id > USHRT_MAX) {
|
|
warnx("%s > recommended max gid value (%u)", p, USHRT_MAX);
|
|
/* return (0); This should not be fatal! */
|
|
}
|
|
pw->pw_gid = id;
|
|
|
|
if (flags & _PWSCAN_MASTER ) {
|
|
if (!(pw->pw_class = strsep(&bp, ":"))) /* class */
|
|
goto fmt;
|
|
if (pw->pw_class[0])
|
|
pw->pw_fields |= _PWF_CLASS;
|
|
|
|
if (!(p = strsep(&bp, ":"))) /* change */
|
|
goto fmt;
|
|
if (p[0])
|
|
pw->pw_fields |= _PWF_CHANGE;
|
|
pw->pw_change = atol(p);
|
|
|
|
if (!(p = strsep(&bp, ":"))) /* expire */
|
|
goto fmt;
|
|
if (p[0])
|
|
pw->pw_fields |= _PWF_EXPIRE;
|
|
pw->pw_expire = atol(p);
|
|
}
|
|
if (!(pw->pw_gecos = strsep(&bp, ":"))) /* gecos */
|
|
goto fmt;
|
|
if (pw->pw_gecos[0])
|
|
pw->pw_fields |= _PWF_GECOS;
|
|
|
|
if (!(pw->pw_dir = strsep(&bp, ":"))) /* directory */
|
|
goto fmt;
|
|
if (pw->pw_dir[0])
|
|
pw->pw_fields |= _PWF_DIR;
|
|
|
|
if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */
|
|
goto fmt;
|
|
|
|
p = pw->pw_shell;
|
|
if (root && *p) { /* empty == /bin/sh */
|
|
for (setusershell();;) {
|
|
if (!(sh = getusershell())) {
|
|
if (flags & _PWSCAN_WARN)
|
|
warnx("warning, unknown root shell");
|
|
break;
|
|
}
|
|
if (!strcmp(p, sh))
|
|
break;
|
|
}
|
|
endusershell();
|
|
}
|
|
if (p[0])
|
|
pw->pw_fields |= _PWF_SHELL;
|
|
|
|
if ((p = strsep(&bp, ":"))) { /* too many */
|
|
fmt:
|
|
if (flags & _PWSCAN_WARN)
|
|
warnx("corrupted entry");
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|