126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/*
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* Copyright (c) 1989 - 1994, Julianne Frances Haugh
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* Copyright (c) 1996 - 1997, Marek Michałkiewicz
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* Copyright (c) 2001 - 2005, Tomasz Kłoczko
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* Copyright (c) 2008 , Nicolas François
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the copyright holders or contributors may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Extracted from age.c and made part of libshadow.a - may be useful
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* in other shadow-aware programs. --marekm
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*/
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#include <config.h>
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#include <sys/types.h>
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#include "prototypes.h"
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#include "defines.h"
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#include <pwd.h>
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#include <time.h>
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#ident "$Id$"
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/*
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* isexpired - determine if account is expired yet
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*
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* isexpired calculates the expiration date based on the
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* password expiration criteria.
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*
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* Return value:
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* 0: The password is still valid
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* 1: The password has expired, it must be changed
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* 2: The password has expired since a long time and the account is
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* now disabled. (password cannot be changed)
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* 3: The account has expired
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*/
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int isexpired (const struct passwd *pw, const struct spwd *sp)
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{
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long now;
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now = (long) time ((time_t *) 0) / SCALE;
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if (NULL == sp) {
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return 0;
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}
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/*
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* Quick and easy - there is an expired account field
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* along with an inactive account field. Do the expired
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* one first since it is worse.
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*/
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if ((sp->sp_expire > 0) && (now >= sp->sp_expire)) {
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return 3;
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}
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/*
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* Last changed date 1970-01-01 (not very likely) means that
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* the password must be changed on next login (passwd -e).
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*
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* The check for "x" is a workaround for RedHat NYS libc bug -
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* if /etc/shadow doesn't exist, getspnam() still succeeds and
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* returns sp_lstchg==0 (must change password) instead of -1!
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*/
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if ( (0 == sp->sp_lstchg)
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&& (strcmp (pw->pw_passwd, SHADOW_PASSWD_STRING) == 0)) {
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return 1;
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}
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if ( (sp->sp_lstchg > 0)
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&& (sp->sp_max >= 0)
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&& (sp->sp_inact >= 0)
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&& (now >= (sp->sp_lstchg + sp->sp_max + sp->sp_inact))) {
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return 2;
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}
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/*
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* The last and max fields must be present for an account
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* to have an expired password. A maximum of >10000 days
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* is considered to be infinite.
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*/
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if ( (-1 == sp->sp_lstchg)
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|| (-1 == sp->sp_max)
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|| (sp->sp_max >= (10000L * DAY / SCALE))) {
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return 0;
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}
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/*
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* Calculate today's day and the day on which the password
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* is going to expire. If that date has already passed,
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* the password has expired.
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*/
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if (now >= (sp->sp_lstchg + sp->sp_max)) {
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return 1;
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}
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return 0;
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}
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