[Fedora-directory-users] Some password policy enforcement information questions
Bliss, Aaron
ABliss at preferredcare.org
Sat Feb 25 01:21:30 UTC 2006
Well, it turns out that the passwordExpWarned attribute doesn't get
changed either if a user authenticates to a server with a key via ssh;
so I had to redesign how the script works; I figured that it's probably
best to give the users the actual number of days they have before their
password will expire. I've actually turned it into 2 scripts, the bash
script is used to query the ldap server for password expiration info,
and it passes this value to the perl script; Calling this from
/etc/profile should work just fine. I thought this might be helpful to
other users (perl script was tough for me, as I've never really scripted
in perl but couldn't figure out a way to do in bash), so here you go:
#!/bin/bash
#use this script in order to figure out when the users
#password is going to expire and give them a heads up about it
#figure out who the user is
mynam=`whoami`
#create some exceptions to this rule so that they don't get a phony
messsage
if [ $mynam = root ] ; then
exit
fi
#pswarn1=`ldapsearch -x -ZZ "(uid=$mynam)" passwordExpWarned | grep
passwordExpWarned | grep -v '#' | awk '{print $2}'`
#figure out exactly when their password is going to expire
pswar=`ldapsearch -x -ZZ "(uid=$mynam)" passwordexpirationtime | grep
passwordexpirationtime | grep -v '#' | awk '{print $2}' | cut -c 1-8`
#setup some variables
pwmonth=`echo $pswar | cut -c 5-6`
pwday=`echo $pswar | cut -c 7-8`
pwyear=`echo $pswar | cut -c 1-4`
#perl script expects input year month day
/usr/local/sbin/ck_pass1.pl $pwyear $pwmonth $pwday
exit 0
#! /usr/bin/perl
use strict;
use warnings;
use Time::Local;
#epoch secs for 2 weeks equal 1209600
#setup vars that were passed in year, month, day in that order
my $varpass0 = $ARGV[0];
my $varpass1 = $ARGV[1];
my $varpass2 = $ARGV[2];
#timelocal doesn't work for dates past the year 2038
if ($varpass0 >= 2038) {
print "year passed is too much for this script\n";
exit 0;
}
#get todays date and format it properly
#beaware localtime is going to format year-1900 and month-1
my ($mday,$mmonth,$myear) = (localtime(time)) [3,4,5];
my $epdate = timelocal (0,0,0,$mday,$mmonth,$myear);
#get epoch date for when password will expire
#we have to format what was passed to us to make it usable by timelocal
my $varpass00 = $varpass0 - 1900;
my $varpass11 = $varpass1 - 1;
my $passexp = timelocal (0,0,0,$varpass2,$varpass11,$varpass00);
#subtract password expiration from today and see what we get
my $passans = $passexp - $epdate;
my $finans2 = $passans / 86400;
#lets see where we stand
#and send a warning to the end users if necessary
if ($passans <= 1209600) {
printf "Warning, Your Ldap password will expire in %.0f", $finans2;
print " days\n";
}
-----Original Message-----
From: Bliss, Aaron
Sent: Monday, February 20, 2006 10:35 AM
To: 'General discussion list for the Fedora Directory server project.'
Subject: RE: [Fedora-directory-users] Some password policy enforcement
information questions
Yep, this issue occurs over ssh.
Aaron
-----Original Message-----
From: fedora-directory-users-bounces at redhat.com
[mailto:fedora-directory-users-bounces at redhat.com] On Behalf Of Richard
Megginson
Sent: Monday, February 20, 2006 10:08 AM
To: General discussion list for the Fedora Directory server project.
Subject: Re: [Fedora-directory-users] Some password policy enforcement
information questions
Bliss, Aaron wrote:
>Some more trouble with password expiration warnings; I have passwords
>warnings being displayed to users when they use passwords, however
>users configured to use key authentication
>
Do you mean ssh?
>do not receive this warnings; has
>anyone seen this before? This is of course going to be a very big
>problem for me. Any ideas? Thanks again.
>
>
>Aaron
>
>-----Original Message-----
>From: Bliss, Aaron
>Sent: Wednesday, January 25, 2006 7:48 PM
>To: General discussion list for the Fedora Directory server project.
>Subject: RE: [Fedora-directory-users] Some password policy enforcement
>information questions
>
>Turns out the issue I was having was with my clients; I'm not sure why,
>but the administrator before me had "UseLogin Yes" set in
>/etc/ssh/sshd_config; commenting this out immediately started
>generating password warnings to users (as configured by the directory
>server); does anyone know what the UseLogin option is used for?
Thanks.
>
>Aaron
>
>-----Original Message-----
>From: Bliss, Aaron
>Sent: Thursday, January 19, 2006 3:15 PM
>To: 'General discussion list for the Fedora Directory server project.'
>Subject: RE: [Fedora-directory-users] Some password policy enforcement
>information questions
>
>Thanks very much for the explanation; makes much sense to me now; I did
>some playing around, and got the directory server to spit out to me
>that your password is going to expire in x amount of days. Thanks
again.
>
>Aaron
>
>-----Original Message-----
>From: fedora-directory-users-bounces at redhat.com
>[mailto:fedora-directory-users-bounces at redhat.com] On Behalf Of Richard
>Megginson
>Sent: Thursday, January 19, 2006 2:35 PM
>To: General discussion list for the Fedora Directory server project.
>Subject: Re: [Fedora-directory-users] Some password policy enforcement
>information questions
>
>It looks like the way it works is this:
>When you have enabled password warning, an operational attribute called
>"passwordExpWarned" is created in the user's entry. The value will be
>0 until the user does a successful BIND operation and the time between
>now and the configured password expiration time is less than or equal
>to the configured password warning time. When this happens, the
>warning will be sent, the value of passwordExpWarned will be changed to
>1, and the operational attribute passwordExpirationTime in the user's
>entry will be set to the time at which the password will expire. When
>the user changes the password, passwordExpWarned will be reset to 0 and
>passwordExpirationTime will be set to the new expiration time.
>
>Bliss, Aaron wrote:
>
>
>
>>If I've configured a correct password policy and the warning attribute
>>is not getting updated, should this be considered a bug?
>>
>>Aaron
>>
>>-----Original Message-----
>>From: fedora-directory-users-bounces at redhat.com
>>[mailto:fedora-directory-users-bounces at redhat.com] On Behalf Of
>>Richard
>>
>>
>
>
>
>>Megginson
>>Sent: Thursday, January 19, 2006 1:48 PM
>>To: General discussion list for the Fedora Directory server project.
>>Subject: Re: [Fedora-directory-users] Some password policy enforcement
>>information questions
>>
>>Bliss, Aaron wrote:
>>
>>
>>
>>
>>
>>>Please forgive me if I'm asking silly newbie questions, however I'm
>>>trying to understand exactly what I'm seeing thru fds; first the
>>>policy
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>>I've configured on the directory using the fds console:
>>>I've enabled fine-grain password policy for the data unit, including
>>>password history enforcement, password expiration after 90 days,
>>>password warning 14 days before password expires, check password
>>>syntax, account lockout policy enabled after 3 login failures for 120
>>>minutes and reset failure count after 15 minutes.
>>>
>>>Everything seems to be working except for send password warning; in
>>>
>>>
>the
>
>
>>>client's ldap.conf file, I've enabled pam_lookup_policy yes.
>>>
>>>Looking at account information attributes for a user,
>>>passwordexpwarnd
>>>
>>>
>
>
>
>>>value is 0; I've reset users password to try to initialize the
>>>password
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>>policy, however this value never seems to change. According to this
>>>documentation
>>>http://www.redhat.com/docs/manuals/dir-server/ag/7.1/password.html#10
>>>7
>>>7
>>>0
>>>81 I believe that this attribute is stored in seconds. Is this true?
>>>
>>>
>>>
>>>
>>>
>>>
>>Yes.
>>
>>
>>
>>
>>
>>>If so, what can I do to ensure this attribute is getting updated
>>>(assuming that this is the attribute responsible for triggering
>>>password expiration warning).
>>>
>>>
>>>
>>>
>>>
>>>
>>I'm not really sure.
>>
>>
>>
>>
>>
>>>Second issue/question:
>>>I've looked at this wiki
>>>http://directory.fedora.redhat.com/wiki/Howto:PAM and near the very
>>>bottom it mentions adding the following
>>>
>>>dn: cn=config
>>>changetype: modify
>>>add: passwordExp
>>>passwordExp: on
>>>-
>>>add: passwordMaxAge
>>>passwordMaxAge: 8640000 (this I believe would give a password max age
>>>of 100 days)
>>>
>>>Do I need to add these attributes even though I've configured the
>>>password policy using fds console has done this for me. Is this the
>>>case, I see don't these attributes in the gui, however I do see
>>>passwordexpirationtime as an attribute and is set to 90 days from now
>>>(I'm want to ensure that accounts are indeed locked after passwords
>>>have expired).
>>>
>>>
>>>
>>>
>>>
>>>
>>Those attributes are only for global (default) password policy - what
>>you have set for fine grained password policy will override those.
>>
>>
>>
>>
>>
>>>Also, Jim Summers posted to this group that he saw an issue with
>>>shadowpasswd / shadowexpire fields not being updated
>>>https://www.redhat.com/archives/fedora-directory-users/2005-December/
>>>m
>>>s
>>>g
>>>00367.html
>>>
>>>Can anyone tell me what these fields are used for, as I don't see any
>>>mention of them in this documentation
>>>http://www.redhat.com/docs/manuals/dir-server/ag/7.1/password.html#10
>>>7
>>>7
>>>0
>>>81
>>>
>>>
>>>
>>>
>>>
>>>
>>Right. They are a PAM/posix thing - FDS treats them as any other data
>>- it doesn't update them from it's own password policy.
>>
>>
>>
>>
>>
>>>Thanks again very much.
>>>
>>>Aaron
>>>
>>>
>>>
>>>
>>>www.preferredcare.org
>>>"An Outstanding Member Experience," Preferred Care HMO Plans -- J. D.
>>>Power and Associates
>>>
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>>>The information contained in this electronic message is intended for
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>>>https://www.redhat.com/mailman/listinfo/fedora-directory-users
>>>
>>>
>>>
>>>
>>>
>>>
>>www.preferredcare.org
>>"An Outstanding Member Experience," Preferred Care HMO Plans -- J. D.
>>Power and Associates
>>
>>Confidentiality Notice:
>>The information contained in this electronic message is intended for
>>
>>
>the exclusive use of the individual or entity named above and may
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>>
>>
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>>
>
>
>www.preferredcare.org
>"An Outstanding Member Experience," Preferred Care HMO Plans -- J. D.
>Power and Associates
>
>Confidentiality Notice:
>The information contained in this electronic message is intended for
the exclusive use of the individual or entity named above and may
contain privileged or confidential information. If the reader of this
message is not the intended recipient or the employee or agent
responsible to deliver it to the intended recipient, you are hereby
notified that dissemination, distribution or copying of this information
is prohibited. If you have received this communication in error, please
notify the sender immediately by telephone and destroy the copies you
received.
>
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>https://www.redhat.com/mailman/listinfo/fedora-directory-users
>
>
www.preferredcare.org
"An Outstanding Member Experience," Preferred Care HMO Plans -- J. D. Power and Associates
Confidentiality Notice:
The information contained in this electronic message is intended for the exclusive use of the individual or entity named above and may contain privileged or confidential information. If the reader of this message is not the intended recipient or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that dissemination, distribution or copying of this information is prohibited. If you have received this communication in error, please notify the sender immediately by telephone and destroy the copies you received.
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