Ldap – Cyrus on CentOS with sasl / pam / ldap

SASL/PAM/LDAP is driving me crazy… that's what I read a lot when googling for problems in this area, and what I experience myself :-S
I'm trying to get Cyrus imap working for virtual hosting on CentOS with this authorisation backend and really don't know what's happening.
In saslauthd I configured the LDAP search filter to use, but it looks like pam completely ignores it.

Here's what I do for testing (done more tests but all with similar results):

[root@testserv ~]# imtest -u my.Email@testserv.mydomain.com -a my.Email@testserv.mydomain.com
WARNING: no hostname supplied, assuming localhost

S: * OK [CAPABILITY IMAP4 IMAP4rev1 LITERAL+ ID STARTTLS] testserv. Cyrus IMAP4 v2.3.7-Invoca-RPM-2.3.7-7.el5_6.4 server ready
C: C01 CAPABILITY
S: * CAPABILITY IMAP4 IMAP4rev1 LITERAL+ ID STARTTLS ACL RIGHTS=kxte QUOTA MAILBOX-REFERRALS NAMESPACE UIDPLUS NO_ATOMIC_RENAME UNSELECT CHILDREN MULTIAPPEND BINARY SORT SORT=MODSEQ THREAD=ORDEREDSUBJECT THREAD=REFERENCES ANNOTATEMORE CATENATE CONDSTORE IDLE LISTEXT LIST-SUBSCRIBED X-NETSCAPE URLAUTH
S: C01 OK Completed
Please enter your password: 
C: L01 LOGIN my.Email@testserv.mydomain.com {6}
S: + go ahead
C: <omitted>
S: L01 NO Login failed: authentication failure
Authentication failed. generic failure
Security strength factor: 0
C: Q01 LOGOUT
* BYE LOGOUT received
Q01 OK Completed
Connection closed.

The LDAP entry does exist (and so does the mailbox in Cyrus):

[root@testserv ~]# ldapsearch -WxD cn=Manager,o=mydomain,c=com mail=my.Email@testserv.mydomain.com
Enter LDAP Password: 
# extended LDIF
#
# LDAPv3
# base <> with scope subtree
# filter: mail=my.Email@testserv.mydomain.com
# requesting: ALL
#

# myuser, accounts, testserv.mydomain.com, mydomain, com
dn: uid=myuser,ou=accounts,dc=testserv.mydomain.com,o=mydomain,c=com
objectClass: top
objectClass: person
objectClass: organizationalPerson
objectClass: inetOrgPerson
objectClass: posixAccount
objectClass: shadowAccount
uidNumber: 16
uid: myuser
gidNumber: 5
givenName: My
sn: Name
mail: my.Email@testserv.mydomain.com
cn: My Name
userPassword:: dYN5ebB0fXhNRn1pZllhRnJX7Uk=
shadowLastChange: 15176
homeDirectory: /dev/null

# search result
search: 2
result: 0 Success

# numResponses: 2
# numEntries: 1

This is what I get in /var/log/messages

Aug  2 04:00:11 testserv cyrus/imap[12514]: auxpropfunc error invalid parameter supplied 
Aug  2 04:00:19 testserv saslauthd[5926]: do_auth         : auth failure: [user=my.email@testserv.mydomain.com] [service=imap] [realm=testserv.mydomain.com] [mech=pam] [reason=PAM auth error]

… /var/adm/auth.log

Aug  2 04:00:11 testserv cyrus/imap[12514]: auxpropfunc error invalid parameter supplied 
Aug  2 04:00:11 testserv cyrus/imap[12514]: _sasl_plugin_load failed on sasl_auxprop_plug_init for plugin: ldapdb 
Aug  2 04:00:19 testserv saslauthd[5926]: DEBUG: auth_pam: pam_authenticate failed: User not known to the underlying authentication module
Aug  2 04:00:19 testserv saslauthd[5926]: do_auth         : auth failure: [user=my.email@testserv.mydomain.com] [service=imap] [realm=testserv.mydomain.com] [mech=pam] [reason=PAM auth error]

(AFAIK I can ignore the auxprop msg)

… and /var/log/slapd.log:

Aug  2 04:00:19 testserv slapd[5968]: conn=61 fd=27 ACCEPT from IP=127.0.0.1:51403 (IP=0.0.0.0:389) 
Aug  2 04:00:19 testserv slapd[5968]: conn=61 op=0 BIND dn="" method=128 
Aug  2 04:00:19 testserv slapd[5968]: conn=61 op=0 RESULT tag=97 err=0 text= 
Aug  2 04:00:19 testserv slapd[5968]: conn=61 op=1 SRCH base="o=mydomain,c=com" scope=2 deref=0 filter="(mail=my.Email@testserv.mydomain.com)" 
Aug  2 04:00:19 testserv slapd[5968]: conn=61 op=1 SEARCH RESULT tag=101 err=0 nentries=0 text= 
Aug  2 04:00:19 testserv slapd[5968]: conn=61 op=2 UNBIND 
Aug  2 04:00:19 testserv slapd[5968]: conn=61 fd=27 closed 

These are the settings in In /etc/imapd.conf:

sasl_mech_list: PLAIN LOGIN
sasl_pwcheck_method: saslauthd
## sasl_auxprop_plugin: sasldb
sasl_auto_transition: no

and my sasl config:

[root@testserv ~]# cat /etc/sysconfig/saslauthd 
# Directory in which to place saslauthd's listening socket, pid file, and so
# on.  This directory must already exist.
SOCKETDIR=/var/run/saslauthd

# Mechanism to use when checking passwords.  Run "saslauthd -v" to get a list
# of which mechanism your installation was compiled with the ablity to use.
MECH=pam

# Additional flags to pass to saslauthd on the command line.  See saslauthd(8)
# for the list of accepted flags.
FLAGS="-c -r -O /etc/saslauthd.conf"

[root@testserv ~]# cat /etc/saslauthd.conf
ldap_servers: ldap://127.0.0.1/
ldap_search_base: dc=%d,o=mydomain,c=com
ldap_auth_method: bind 
#ldap_filter: (|(uid=%u)((&(mail=%u@%d)(accountStatus=active))) 
ldap_filter: (&(mail=%u@%d)(accountStatus=active)) 
ldap_debug: 1 
ldap_version: 3

The accountStatus=active is not in ldap yet, but that doesn't make a difference since I don't see it in the filter… that's not the reason for the failure.
The weird thing is, I do get an error when I rename or remove /etc/saslauthd.conf, but when the file exists it seems happily ignored…

The filter in slapd.log seems to be taken from /etc/ldap.conf. Apart from some timers, that only contains:

host 127.0.0.1
base o=mydomain,c=com
pam_login_attribute mail

Outcommenting the pam_login_attribute results in this filter in slapd.log:

filter="(uid=my.Email@testserv.mydomain.com)" 

Pam-imap looks like this:

[root@testserv ~]# cat /etc/pam.d/imap 
auth       required    pam_ldap.so debug
account       required    pam_ldap.so debug

#auth       sufficient   pam_unix.so likeauth nullok
#auth       sufficient  pam_ldap.so use_first_pass
#auth       required     pam_deny.so
#account    sufficient   pam_unix.so
#account    sufficient   pam_ldap.so

The outcommented stuff is because I don't have the cyrus admin user in Ldap; that's a Linux user. That works fine when uncommented, but I still need to play around with that a little and first I wanna get imap working.

Finally nsswitch:

[root@testserv ~]# cat /etc/nsswitch.conf 
#
# /etc/nsswitch.conf
#
# An example Name Service Switch config file. This file should be
# sorted with the most-used services at the beginning.
#
# The entry '[NOTFOUND=return]' means that the search for an
# entry should stop if the search in the previous entry turned
# up nothing. Note that if the search failed due to some other reason
# (like no NIS server responding) then the search continues with the
# next entry.
#
# Legal entries are:
#
#       nisplus or nis+         Use NIS+ (NIS version 3)
#       nis or yp               Use NIS (NIS version 2), also called YP
#       dns                     Use DNS (Domain Name Service)
#       files                   Use the local files
#       db                      Use the local database (.db) files
#       compat                  Use NIS on compat mode
#       hesiod                  Use Hesiod for user lookups
#       [NOTFOUND=return]       Stop searching if not found so far
#

# To use db, put the "db" in front of "files" for entries you want to be
# looked up first in the databases
#
# Example:
#passwd:    db files nisplus nis
#shadow:    db files nisplus nis
#group:     db files nisplus nis

passwd: compat ldap
group:  compat ldap
shadow: compat ldap

hosts:      files dns

bootparams: nisplus [NOTFOUND=return] files

ethers:     files
netmasks:   files
networks:   files
protocols:  files
rpc:        files
services:   files

netgroup:   nisplus

publickey:  nisplus

automount:  files nisplus
aliases:    files nisplus

Any info where to start looking will be greatly appreciated!

Thnx in advance