(ITS#5110) back-ldap, proxy authentication fails when chasing referrals

Full_Name: Florian Huiskens Version: 2.3.30 OS: Ubuntu 7.04 URL: Submission from: (NULL) (85.216.39.101)

I try to set up an environment, where a client communicates with an LDAP-Proxy.

The Proxy forwards the client's query (using the ldap-backend) to an LDAP-Slave. The authentication mechanism I use (proxy - slave) is SASL (GSSAPI). The proxy has a kerberos ticket available.

Proxy Authentication works in general (using PROXAUTHZ), but fails on referrals (though rebind-as-user is set). This means that if information is written and the proxy receives a referral to the master, the bind-informations gets lost.

Thanks for any help, regards Florian

Config-files:

Master:

include /etc/ldap/schema/core.schema include /etc/ldap/schema/cosine.schema include /etc/ldap/schema/nis.schema include /etc/ldap/schema/inetorgperson.schema

pidfile /var/run/slapd/slapd.pid

argsfile /var/run/slapd/slapd.args

loglevel 0

# Where the dynamically loaded modules are stored modulepath /usr/lib/ldap moduleload back_bdb moduleload syncprov

# The maximum number of entries that is returned for a search operation sizelimit 500

# The tool-threads parameter sets the actual amount of cpu's that is used # for indexing. tool-threads 1

backend bdb checkpoint 512 30

####################################################################### # Specific Directives for database #1, of type bdb: # Database specific directives apply to this databasse until another # 'database' directive occurs database bdb suffix "dc=idm,dc=local"

# rootdn directive for specifying a superuser on the database. This is needed # for syncrepl. rootdn "dc=idm,dc=local"

directory "/var/lib/ldap"

dbconfig set_cachesize 0 2097152 0

dbconfig set_lk_max_objects 1500 dbconfig set_lk_max_locks 1500 dbconfig set_lk_max_lockers 1500

index objectClass eq

# Save the time that the entry gets modified, for database #1 lastmod on

access to attrs=userPassword,shadowLastChange by dn="cn=admin,dc=idm,dc=local" write by dn="uid=ldap/extubuntu.idm.local,ou=slaves,dc=idm,dc=local" read by anonymous auth by * none

access to dn.base="" by * read

access to * by dn="cn=admin,dc=idm,dc=local" write by * read

# syncrepl config overlay syncprov syncprov-checkpoint 100 1 syncprov-sessionlog 100

# SASL setup #sasl-host ubuntu-desktop sasl-authz-policy To sasl-secprops minssf=56 sasl-realm idm.local sasl-regexp uid=(.*),cn=idm.local,cn=gssapi,cn=auth ldap:///dc=idm,dc=local??sub?(|(uid=$1)(cn=$1))

Slave:

include /etc/ldap/schema/core.schema include /etc/ldap/schema/cosine.schema include /etc/ldap/schema/nis.schema include /etc/ldap/schema/inetorgperson.schema

pidfile /var/run/slapd/slapd.pid

argsfile /var/run/slapd/slapd.args

loglevel 0

modulepath /usr/lib/ldap moduleload back_bdb

sizelimit 500

tool-threads 1

backend bdb checkpoint 512 30

database bdb

suffix "dc=idm,dc=local" #rootdn "dc=idm,dc=local" rootdn "dc=nowhere,dc=nouniverse"

directory "/var/lib/ldap"

dbconfig set_cachesize 0 2097152 0

dbconfig set_lk_max_objects 1500 dbconfig set_lk_max_locks 1500 dbconfig set_lk_max_lockers 1500

index objectClass eq

lastmod on

access to attrs=userPassword,shadowLastChange by dn="cn=admin,dc=idm,dc=local" write by anonymous auth by self write by * none # by dn="cn=repl-admin,dc=idm,dc=local" write

access to dn.base="" by * read

access to * by dn="cn=admin,dc=idm,dc=local" write by self write by * read # by dn="cn=repl-admin,dc=idm,dc=local" write # by * read

syncrepl rid=1 provider=ldap://ubuntu-desktop:389 searchbase="dc=idm,dc=local" type=refreshAndPersist retry="60 10 300 +" bindmethod=sasl saslmethod=GSSAPI updateref ldap://ubuntu-desktop:389

# SASL setup sasl-authz-policy To sasl-secprops minssf=56 sasl-realm idm.local sasl-regexp uid=(.*),cn=idm.local,cn=gssapi,cn=auth ldap:///dc=idm,dc=local??sub?(|(uid=$1)(cn=$1))

Proxy (running on the same host as the Slave):

include /etc/ldap/schema/core.schema include /etc/ldap/schema/cosine.schema include /etc/ldap/schema/nis.schema include /etc/ldap/schema/inetorgperson.schema

pidfile /var/run/slapd/slapd.pid argsfile /var/run/slapd/slapd.args

loglevel 1

modulepath /usr/lib/ldap moduleload back_ldap

database ldap uri ldap://extubuntu.idm.local:390/ suffix "dc=idm,dc=local" chase-referrals yes rebind-as-user yes

# SASL setup sasl-secprops minssf=56 sasl-realm idm.local sasl-regexp uid=(.*),cn=idm.local,cn=gssapi,cn=auth ldap:///dc=idm,dc=local??sub?(|(uid=$1)(cn=$1)) idassert-bind bindmethod=sasl mode=self authcid=ldap/extubuntu.idm.local # should come from ticket but does not.

Snippets of an ldapsearch:

debugging information from the proxy conn=10 fd=9 ACCEPT from IP=127.0.0.1:3380 (IP=0.0.0.0:389) conn=10 op=0 SRCH base="" scope=0 deref=0 filter="(objectClass=*)" conn=10 op=0 SRCH attr=supportedSASLMechanisms conn=10 op=0 SEARCH RESULT tag=101 err=0 nentries=1 text= conn=10 op=1 BIND dn="" method=163 conn=10 op=2 BIND dn="" method=163 conn=10 op=2 RESULT tag=97 err=14 text= conn=10 op=3 BIND dn="" method=163 conn=10 op=1 RESULT tag=97 err=14 text= request done: ld 0x81dd960 msgid 3 SASL [conn=10] Error: unable to open Berkeley db /etc/sasldb2: No such file or directory conn=10 op=3 BIND authcid="admin@idm.local" authzid="admin@idm.local" conn=10 op=3 BIND dn="cn=admin,dc=idm,dc=local" mech=GSSAPI ssf=56 conn=10 op=3 RESULT tag=97 err=0 text= conn=10 op=4 SRCH base="dc=idm,dc=local" scope=2 deref=0 filter="(cn=fhuisk)" request done: ld 0x8197038 msgid 1 request done: ld 0x8197038 msgid 2 request done: ld 0x8197038 msgid 3 request done: ld 0x8197038 msgid 4 request done: ld 0x8197038 msgid 5 conn=10 op=4 SEARCH RESULT tag=101 err=0 nentries=1 text= conn=10 op=5 UNBIND conn=10 fd=9 closed

debugging information from the slave conn=0 op=2 SRCH base="dc=idm,dc=local" scope=2 deref=0 filter="(|(uid=admin)(cn=admin))" conn=0 op=2 SRCH attr=1.1 <= bdb_equality_candidates: (uid) index_param failed (18) <= bdb_equality_candidates: (cn) index_param failed (18) conn=0 op=2 SEARCH RESULT tag=101 err=0 nentries=1 text= conn=2 fd=16 ACCEPT from IP=127.0.1.1:2814 (IP=0.0.0.0:390) conn=2 op=0 SRCH base="" scope=0 deref=0 filter="(objectClass=*)" conn=2 op=0 SRCH attr=supportedSASLMechanisms conn=2 op=0 SEARCH RESULT tag=101 err=0 nentries=1 text= conn=2 op=1 BIND dn="" method=163 conn=2 op=2 BIND dn="" method=163 conn=2 op=2 RESULT tag=97 err=14 text= conn=2 op=3 BIND dn="" method=163 <= bdb_equality_candidates: (uid) index_param failed (18) <= bdb_equality_candidates: (cn) index_param failed (18) SASL [conn=2] Error: unable to open Berkeley db /etc/sasldb2: No such file or directory conn=2 op=3 BIND authcid="ldap/extubuntu.idm.local@idm.local" authzid="ldap/extubuntu.idm.local@idm.local" conn=2 op=3 BIND dn="uid=ldap/extubuntu.idm.local,ou=slaves,dc=idm,dc=local" mech=GSSAPI ssf=56 conn=2 op=3 RESULT tag=97 err=0 text= conn=2 op=4 PROXYAUTHZ dn="cn=admin,dc=idm,dc=local" conn=2 op=4 SRCH base="dc=idm,dc=local" scope=2 deref=0 filter="(cn=fhuisk)" <= bdb_equality_candidates: (cn) index_param failed (18) conn=2 op=4 SEARCH RESULT tag=101 err=0 nentries=1 text= conn=2 op=1 RESULT tag=97 err=14 text= conn=2 op=5 UNBIND conn=2 fd=16 closed ldapsearch call and result root@extUbuntu:/etc/ldap# ldapsearch cn=fhuisk SASL/GSSAPI authentication started SASL username: admin@IDM.LOCAL SASL SSF: 56 SASL installing layers # extended LDIF # # LDAPv3 # base <> with scope subtree # filter: cn=fhuisk # requesting: ALL #

# fhuisk, users, idm.local dn: cn=fhuisk,ou=users,dc=idm,dc=local uid: fhuisk givenName:: RmxvcmlhbiA= objectClass: top objectClass: person objectClass: organizationalPerson objectClass: inetOrgPerson sn: Huiskens cn: fhuisk userPassword:: dGVzdA==

# search result search: 5 result: 0 Success

# numResponses: 2 # numEntries: 1 root@extUbuntu:/etc/ldap#

fyi: ldapwhoami root@extUbuntu:/etc/ldap# ldapwhoami SASL/GSSAPI authentication started SASL username: admin@IDM.LOCAL SASL SSF: 56 SASL installing layers dn:cn=admin,dc=idm,dc=local Result: Success (0) root@extUbuntu:/etc/ldap#

Snippets of an ldapmodify debugging information from the proxy conn=0 fd=9 ACCEPT from IP=127.0.0.1:3145 (IP=0.0.0.0:389) conn=0 op=0 SRCH base="" scope=0 deref=0 filter="(objectClass=*)" conn=0 op=0 SRCH attr=supportedSASLMechanisms conn=0 op=0 SEARCH RESULT tag=101 err=0 nentries=1 text= conn=0 op=1 BIND dn="" method=163 conn=0 op=2 BIND dn="" method=163 conn=0 op=2 RESULT tag=97 err=14 text= conn=0 op=3 BIND dn="" method=163 request done: ld 0x81a39f8 msgid 1 conn=0 op=1 RESULT tag=97 err=14 text= request done: ld 0x81a39f8 msgid 2 SASL [conn=0] Error: unable to open Berkeley db /etc/sasldb2: No such file or directory conn=0 op=3 BIND authcid="admin@idm.local" authzid="admin@idm.local" conn=0 op=3 BIND dn="cn=admin,dc=idm,dc=local" mech=GSSAPI ssf=56 conn=0 op=3 RESULT tag=97 err=0 text= conn=0 op=4 MOD dn="cn=fhuisk,ou=users,dc=idm,dc=local" conn=0 op=4 MOD attr=cn request done: ld 0x8192200 msgid 1 request done: ld 0x8192200 msgid 2 request done: ld 0x8192200 msgid 3 request done: ld 0x8192200 msgid 4 request done: ld 0x8192200 msgid 7 request done: ld 0x8192200 msgid 5 conn=0 op=4 RESULT tag=103 err=47 text=anonymous proxyAuthz not allowed conn=0 op=5 UNBIND conn=0 fd=9 closed

debugging information from the slave conn=0 fd=13 ACCEPT from IP=127.0.1.1:2862 (IP=0.0.0.0:390) conn=0 op=0 BIND dn="" method=128 conn=0 op=0 RESULT tag=97 err=0 text= conn=0 op=1 SRCH base="dc=idm,dc=local" scope=2 deref=0 filter="(|(uid=admin)(cn=admin))" conn=0 op=1 SRCH attr=1.1 <= bdb_equality_candidates: (uid) index_param failed (18) <= bdb_equality_candidates: (cn) index_param failed (18) conn=0 op=1 SEARCH RESULT tag=101 err=0 nentries=1 text= conn=1 fd=15 ACCEPT from IP=127.0.1.1:2863 (IP=0.0.0.0:390) conn=1 op=0 SRCH base="" scope=0 deref=0 filter="(objectClass=*)" conn=1 op=0 SRCH attr=supportedSASLMechanisms conn=1 op=0 SEARCH RESULT tag=101 err=0 nentries=1 text= conn=1 op=1 BIND dn="" method=163 conn=1 op=2 BIND dn="" method=163 conn=1 op=3 BIND dn="" method=163 <= bdb_equality_candidates: (uid) index_param failed (18) <= bdb_equality_candidates: (cn) index_param failed (18) SASL [conn=1] Error: unable to open Berkeley db /etc/sasldb2: No such file or directory conn=1 op=3 BIND authcid="ldap/extubuntu.idm.local@idm.local" authzid="ldap/extubuntu.idm.local@idm.local" conn=1 op=3 BIND dn="uid=ldap/extubuntu.idm.local,ou=slaves,dc=idm,dc=local" mech=GSSAPI ssf=56 conn=1 op=2 RESULT tag=97 err=14 text= conn=1 op=4 PROXYAUTHZ dn="cn=admin,dc=idm,dc=local" conn=1 op=4 MOD dn="cn=fhuisk,ou=users,dc=idm,dc=local" conn=1 op=4 MOD attr=cn conn=1 op=4 RESULT tag=103 err=10 text= conn=1 op=3 RESULT tag=97 err=0 text= conn=1 op=1 RESULT tag=97 err=14 text= conn=1 op=5 UNBIND conn=1 fd=15 closed

debugging information from the master conn=1 fd=14 ACCEPT from IP=172.16.82.240:1290 (IP=0.0.0.0:389) conn=1 op=0 BIND dn="" method=128 conn=1 op=0 RESULT tag=97 err=0 text= conn=1 op=1 RESULT tag=103 err=47 text=anonymous proxyAuthz not allowed do_modify: get_ctrls failed conn=1 op=2 UNBIND conn=1 fd=14 closed

ldapmodify call and result root@extUbuntu:/etc/ldap# ldapmodify SASL/GSSAPI authentication started SASL username: admin@IDM.LOCAL SASL SSF: 56 SASL installing layers dn: cn=fhuisk,ou=users,dc=idm,dc=local changetype: modify add: cn cn: newCN -

modifying entry "cn=fhuisk,ou=users,dc=idm,dc=local" ldapmodify: Proxy Authorization Failure (47) additional info: anonymous proxyAuthz not allowed

root@extUbuntu:/etc/ldap#