Or get a host principal keytab for the machine (the preferred solution).
On Aug 5, 2009, at 9:10 AM, Sean O'Malley wrote:
Try adding:
[libdefaults]
verify_ap_req_nofail = false
This is the default setting for linux pam_krb5
However sasl may have it set to true by default
Sean
On Wed, 5 Aug 2009, Martin Schweizer wrote:
Hello
Yet I found not realy a solution for the attached problem but an
other
way. Now I use PAM (salslauthd -a pam) insted Kerberos5 (salslauthd
-a
kerberos5) in saslauthd. The problem seams to be around auth_krb5.c
but my C knowledge is not good enough for solve the problem self. So
if anybody has an interest to solve this, he can contact my. I then
can explain him the problem detailed.
Regards,
---------- Forwarded message ----------
From: Martin Schweizer <schweizer.martin@xxxxxxxxx>
Date: 2009/8/5
Subject: Cyrus Imapd with SASL, authenticate against AD Windows 2003
with Kerberos5
To: cyrus-sasl@xxxxxxxxxxxxxxxxxxxx
Hello
My goal is to authenticate my Cyrus Imapd users against Windos 2003
Active Directory with Kerberos . I have the following setup:
Kerberos5 client
===========
FreeBSD acsvfbsd06.domain.tld 7.2-RELEASE FreeBSD 7.2-RELEASE
/etc/krb.conf:
[libdefaults]
default_realm = domain.tld
default_etypes_des = des-cbc-md5
[realms]
ACUTRONIC.CH = {
kdc = tcp/acsv3k04.domain.tld:88
}
[logging]
kdc = SYSLOG:INFO:AUTH
admin_server = SYSLOG:INFO:AUTH
default = SYSLOG:INFO:AUTH
/etc/krb5.keytab (ktutil list output):
For the keytab file I followed:
http://technet.microsoft.com/en-us/library/bb742433.aspx
FILE:/etc/krb5.keytab:
Vno Type Principal
1 des-cbc-md5 host/acsvfbsd06.domain.tld@xxxxxxxxxx
I get tickets if I use kinit user:
acsvfbsd06# kinit user
martin@xxxxxxxxxx's Password:
kinit: NOTICE: ticket renewable lifetime is 1 week
klist:
Credentials cache: FILE:/tmp/krb5cc_0
Principal: user@xxxxxxxxxx
Issued Expires Principal
Jul 31 17:58:09 Aug 1 03:57:44 krbtgt/DOMAIN.TLD@xxxxxxxxxx
I an use ldapsearch as follows:
acsvfbsd06# ldapsearch -v -LLL -b
"OU=Mitgliedsserver,OU=ACH,DC=Domain,DC=tld" -h acsv3k04.domain.tld
description
ldap_initialize( ldap://acsv3k04.domain.tld)
SASL/GSSAPI authentication started
SASL username: user@xxxxxxxxxx
SASL SSF: 56
SASL data security layer installed.
filter: (objectclass=*)
requesting: description
dn: OU=Mitgliedsserver,OU=ACH,DC=Domain,DC=tld
...
[snip]
So far all looks well.
For the Cyrus Imapd setup I run saslauthd -a kerberos5.
/usr/local/etc/imapd.conf:
configdirectory: /usr/imap/var/imap
partition-default: /usr/imap/var/spool/imap
virtdomains: yes
admins:root cyrus
sasl_option: 1
sasl_pwcheck_method: saslauthd
sasl_mech_list: GSSAPI PLAIN LOGIN CRAM-MD5 DIGEST-MD5
sasl_log_level: 7
lmtpsocket: /usr/imap/var/imap/socket/lmtp
allowplaintext: yes
Each time I start a test by
- testsaslauthd -u user -p password
or
- imtest -m plain -a user localhost
I get ervery time
saslauthd[42062]: do_auth : auth failure: [user=user]
[service=imap] [realm=] [mech=kerberos5] [reason=krb5_verify_user_opt
failed]
The krb5_verify_user_opt failed is comming from the Kerberos 5
Library
(libkrb5, -lkrb5) -> krb5_verify_user_opt and is located in the
auth_krb5.c (from SASL).
I ckecked the kerberos/DNS communication on both sides with tshark
and
Netmon (Microsoft's "tcpdump") but the kerberos communications seems
to be ok. Additionaly I started also a struss on saslauthd but also
without any look.
So I have now no more ideas where I can check. Any hints are welcome.
Regards,
--
Martin Schweizer
schweizer.martin@xxxxxxxxx
Tel.: +41 32 512 48 54 (VoIP)
Fax: +1 619 3300587
--------------------------------------
Sean O'Malley, Information Technologist
Michigan State University
-------------------------------------
------------------------------------------------------
The opinions expressed in this message are mine,
not those of Caltech, JPL, NASA, or the US Government.
Henry.B.Hotz@xxxxxxxxxxxx, or hbhotz@xxxxxxx
