103 lines
2.4 KiB
C
103 lines
2.4 KiB
C
/*
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* SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
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* SPDX-FileCopyrightText: 1996 - 1997, Marek Michałkiewicz
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* SPDX-FileCopyrightText: 2001 - 2005, Tomasz Kłoczko
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* SPDX-FileCopyrightText: 2008 - 2009, Nicolas François
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*
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* SPDX-License-Identifier: BSD-3-Clause
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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, /*@null@*/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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