ckp_svo.c
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上传日期:2007-01-04
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- /*
- * Program: Old SVR4 check password
- *
- * Author: Mark Crispin
- * Networks and Distributed Computing
- * Computing & Communications
- * University of Washington
- * Administration Building, AG-44
- * Seattle, WA 98195
- * Internet: MRC@CAC.Washington.EDU
- *
- * Date: 1 August 1988
- * Last Edited: 7 April 1999
- *
- * Copyright 1999 by the University of Washington
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted, provided
- * that the above copyright notice appears in all copies and that both the
- * above copyright notice and this permission notice appear in supporting
- * documentation, and that the name of the University of Washington not be
- * used in advertising or publicity pertaining to distribution of the software
- * without specific, written prior permission. This software is made available
- * "as is", and
- * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
- * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
- * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
- * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
- * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
- * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
- /* Check password
- * Accepts: login passwd struct
- * password string
- * argument count
- * argument vector
- * Returns: passwd struct if password validated, NIL otherwise
- */
- struct passwd *checkpw (struct passwd *pw,char *pass,int argc,char *argv[])
- {
- char tmp[MAILTMPLEN];
- struct spwd *sp = NIL;
- time_t left;
- time_t now = time (0);
- struct tm *t = gmtime (&now);
- int zone = t->tm_hour * 60 + t->tm_min;
- int julian = t->tm_yday;
- t = localtime (&now); /* get local time now */
- /* minus UTC minutes since midnight */
- zone = t->tm_hour * 60 + t->tm_min - zone;
- /* julian can be one of:
- * 36x local time is December 31, UTC is January 1, offset -24 hours
- * 1 local time is 1 day ahead of UTC, offset +24 hours
- * 0 local time is same day as UTC, no offset
- * -1 local time is 1 day behind UTC, offset -24 hours
- * -36x local time is January 1, UTC is December 31, offset +24 hours
- */
- if (julian = t->tm_yday -julian)
- zone += ((julian < 0) == (abs (julian) == 1)) ? -24*60 : 24*60;
- /* days since 1/1/1970 local time */
- now = ((now /60) + zone) / (60*24);
- /* non-shadow authentication */
- if (!pw->pw_passwd || !pw->pw_passwd[0] ||
- strcmp (pw->pw_passwd,(char *) crypt (pass,pw->pw_passwd))) {
- /* As far as I've been able to determine, here is how the expiration
- * fields in the shadow authentication data work:
- * lstchg last password change date if non-negative. If zero, the
- * user can not log in without changing password.
- * max number of days a password is valid if positive
- * The expiration day is the *last* day that the password is valid.
- */
- /* shadow authentication */
- if ((sp = getspnam (pw->pw_name)) && sp->sp_lstchg &&
- ((sp->sp_lstchg < 0) || (sp->sp_max <= 0) ||
- ((sp->sp_lstchg + sp->sp_max) >= now)) &&
- !strcmp (sp->sp_pwdp,(char *) crypt (pass,sp->sp_pwdp))) {
- if ((sp->sp_lstchg > 0) && (sp->sp_max > 0) &&
- ((left = (sp->sp_lstchg + sp->sp_max) - now) <= 28)) {
- if (left) {
- sprintf (tmp,"[ALERT] Password expires in %ld day(s)",(long) left);
- mm_notify (NIL,tmp,NIL);
- }
- else mm_notify (NIL,"[ALERT] Password expires today!",WARN);
- }
- endspent (); /* don't need shadow password data any more */
- }
- else pw = NIL; /* password failed */
- }
- return pw;
- }