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Diffstat (limited to 'libmisc/isexpired.c')
| -rw-r--r-- | libmisc/isexpired.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/libmisc/isexpired.c b/libmisc/isexpired.c new file mode 100644 index 00000000..a28367a4 --- /dev/null +++ b/libmisc/isexpired.c @@ -0,0 +1,125 @@ +/* + * Copyright (c) 1989 - 1994, Julianne Frances Haugh + * Copyright (c) 1996 - 1997, Marek Michałkiewicz + * Copyright (c) 2001 - 2005, Tomasz Kłoczko + * Copyright (c) 2008 - 2009, 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. + */ + +/* + * 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.c 3362 2011-06-16 21:25:36Z nekral-guest $" + + +/* + * 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; +} + |