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/*
* SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
* SPDX-FileCopyrightText: 1996 - 1997, Marek Michałkiewicz
* SPDX-FileCopyrightText: 2001 - 2005, Tomasz Kłoczko
* SPDX-FileCopyrightText: 2008 - 2009, Nicolas François
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/*
* Extracted from age.c and made part of libshadow.a - may be useful
* in other shadow-aware programs. --marekm
*/
#include <config.h>
#include <sys/types.h>
#include "prototypes.h"
#include "defines.h"
#include <pwd.h>
#include <time.h>
#ident "$Id$"
/*
* isexpired - determine if account is expired yet
*
* isexpired calculates the expiration date based on the
* password expiration criteria.
*
* Return value:
* 0: The password is still valid
* 1: The password has expired, it must be changed
* 2: The password has expired since a long time and the account is
* now disabled. (password cannot be changed)
* 3: The account has expired
*/
int isexpired (const struct passwd *pw, /*@null@*/const struct spwd *sp)
{
long now;
now = (long) time ((time_t *) 0) / SCALE;
if (NULL == sp) {
return 0;
}
/*
* Quick and easy - there is an expired account field
* along with an inactive account field. Do the expired
* one first since it is worse.
*/
if ((sp->sp_expire > 0) && (now >= sp->sp_expire)) {
return 3;
}
/*
* Last changed date 1970-01-01 (not very likely) means that
* the password must be changed on next login (passwd -e).
*
* The check for "x" is a workaround for RedHat NYS libc bug -
* if /etc/shadow doesn't exist, getspnam() still succeeds and
* returns sp_lstchg==0 (must change password) instead of -1!
*/
if ( (0 == sp->sp_lstchg)
&& (strcmp (pw->pw_passwd, SHADOW_PASSWD_STRING) == 0)) {
return 1;
}
if ( (sp->sp_lstchg > 0)
&& (sp->sp_max >= 0)
&& (sp->sp_inact >= 0)
&& (now >= (sp->sp_lstchg + sp->sp_max + sp->sp_inact))) {
return 2;
}
/*
* The last and max fields must be present for an account
* to have an expired password. A maximum of >10000 days
* is considered to be infinite.
*/
if ( (-1 == sp->sp_lstchg)
|| (-1 == sp->sp_max)
|| (sp->sp_max >= ((10000L * DAY) / SCALE))) {
return 0;
}
/*
* Calculate today's day and the day on which the password
* is going to expire. If that date has already passed,
* the password has expired.
*/
if (now >= (sp->sp_lstchg + sp->sp_max)) {
return 1;
}
return 0;
}
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