Ldap – Svn authorizing over sasl+ldap failing after Ubuntu update 10.04 -> 12.04

ldapsaslsvnubuntu-12.04

I have working svnserve solution on Ubuntu 10.04 for authorizing svn users over SASL to Active directory (LDAP, not LDAPDB). Config files are at the bottom.

After upgrading server to 12.04 release, this does not work anymore.
I can authorize user over SASL to LDAP with

 testsaslauthd -u ldap_username -p his_password
 => 0: OK "Success."

But when i try to "svn update" on folder at the same server, it ask me three times for credentials and end with 

 svn: Authentication error from server: SASL(-4): no mechanism available:

I do not know how to track communication between svn and sasl.

Circumstances:

  • Ubuntu 10.04 + subversion 1.6.6 (with Cirrus SASL support) => working
  • Ubuntu 12.04 + subversion 1.6.17 (with Cirrus SASL support) => not working (with same configuration)

file /usr/lib/sasl2/svn.conf

 pwcheck_method: saslauthd
 auxprop_plugin: ldap
 mech_list: PLAIN

file /usr/lib/sasl2/subversion.conf -> symlink to /usr/lib/sasl2/svn.conf

file /opt/svn/repos/conf/svnserve.conf

 [general]
 anon-access = none
 auth-access = write
 #password-db = passwd
 authz-db = authz
 realm = smartsvn

 [sasl]
 use-sasl = true
 min-encryption = 0
 max-encryption = 256

Any idea, how to fixit or trace the problem?

Best Answer

Had the same problems like above only on debian squeeze after a dist-upgrade. After hours of config, restart and reinstalling madness I gave following "svn.conf" a try:

pwcheck_method: saslauthd
#auxprop_plugin: ldap
mech_list: plain login cram-md5 digest-md5

IMO, "mech_list: plain" should be enough. the other mechs are overlefts from previous tryouts.

Here is my /etc/saslauthd.conf

ldap_servers: ldap://xxx.xxx.xxx.xxx
ldap_use_sasl:no
ldap_search_base: DC=domain,DC=tdl
ldap_bind_dn: xxxx@domain.tdl
ldap_bind_pw: magic_word:)
ldap_mech: PLAIN
ldap_auth_method: bind
ldap_filter: (sAMAccountName=%U)
log_level: 7

And here my /etc/default/saslauthd

START=yes
DESC="SASL Authentication Daemon"
NAME="saslauthd"
MECHANISMS="ldap"
MECH_OPTIONS=""
THREADS=5

Update Dez 14:

Today I had the same issue again after an svnserve upgrade (r1615264):

I had to add the following to the svn.conf:

ldapdb_uri: ldap://myldadphost.tld

Don´t ask me why, I just tried it, because three or four years ago the param was already (with other ldap params) in the svn.conf...

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