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Re: Dynamic ACL in OpenLDAP with set:expand not working

Hi Ondřej,
Hi Dieter,

Thanks for your replies! The basic links I've had already found and read through carefully and didn't find a correct solution for my problem =(

The olcAccess statements out of the trials were all placed in front of the asterisk * one. So the order should not be the problem =(

Within the little bash script, the LDIF-parts from the different trials are always replacing this block:
########
## LDIF blocks from below
########

With slapacl I don’t really get a clue – I’ll attach one result below, that I would interpret like that my l.dap user is not allowed to change the description of entity e1 … but if I use JXplorer to connect to the directory as l.dap, I can – even submit. Is it wrong how I’m using slapacl? Or isn’t it reliable since I’m using RegEx?

Thank you for your help!
Cheers,
Martin


$ slapacl -v -U "uid=l.dap,ou=people,dc=example,dc=com" -b "o=e1,ou=entities,dc=example,dc=com" -d acl "description/write"

5d5db13a => access_allowed: search access to "cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn=module{0},cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={0}core,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={1}cosine,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={2}nis,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={3}inetorgperson,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={4}ppolicy,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={5}dhcp,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={6}dnszone,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={7}mail,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={8}mmc,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={9}openssh-lpk,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={10}quota,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={11}radius,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={12}samba,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "cn={13}zarafa,cn=schema,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "olcBackend={0}mdb,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "olcDatabase={-1}frontend,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
Backend ACL: access to *
by dn.base="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" manage
by * +0 break

Backend ACL: access to dn.base=""
by * read

Backend ACL: access to dn.base="cn=subschema"
by * read

5d5db13a => access_allowed: search access to "olcDatabase={0}config,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
Backend ACL: access to *
by dn.base="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" manage
by * +0 break

5d5db13a /etc/ldap/slapd.d: line 1: warning: cannot assess the validity of the ACL scope within backend naming context
5d5db13a => access_allowed: search access to "olcDatabase={1}mdb,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
Backend ACL: access to attrs=userPassword,shadowLastChange
by self =wx
by dn.base="cn=admin,dc=example,dc=com" =wx
by set.exact="[cn=ldapadmins,ou=groups,dc=example,dc=com]/member* & user" =wx
by anonymous auth
by * none

5d5db13a /etc/ldap/slapd.d: line 1: warning: cannot assess the validity of the ACL scope within backend naming context
Backend ACL: access to *
by self write
by dn.base="cn=admin,dc=example,dc=com" write
by set.exact="[cn=ldapadmins,ou=groups,dc=example,dc=com]/member* & user" write
by users read
by * none

5d5db13a /etc/ldap/slapd.d: line 1: warning: cannot assess the validity of the ACL scope within backend naming context
Backend ACL: access to dn.regex="([^,]+,)?o=([^,]+),ou=lve,dc=example,dc=com"
by self write
by dn.base="cn=admin,dc=example,dc=com" write
by set.exact="[cn=ldapadmins,ou=groups,dc=example,dc=com]/member* & user" write
by set.expand="[cn=admin,o=,ou=lve,dc=example,dc=com]/member* & user" write
by set.exact="this/member* & user" read
by * none

5d5db13a => access_allowed: search access to "olcOverlay={0}memberof,olcDatabase={1}mdb,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
5d5db13a => access_allowed: search access to "olcOverlay={1}refint,olcDatabase={1}mdb,cn=config" "objectClass" requested
5d5db13a <= root access granted
5d5db13a => access_allowed: search access granted by manage(=mwrscxd)
Backend ACL: access to *
by * none

5d5db13a config_back_db_open: line 0: warning: cannot assess the validity of the ACL scope within backend naming context
authcDN: "uid=uid\3Dl.dap\2Cou\3Dpeople\2Cdc\3dexample\2Cdc\3Dcom,cn=auth"
5d5db13a => access_allowed: write access to "o=jpbay,ou=lve,dc=example,dc=com" "description" requested
5d5db13a => acl_get: [2] attr description
5d5db13a => acl_mask: access to entry "o=jpbay,ou=lve,dc=example,dc=com", attr "description" requested
5d5db13a => acl_mask: to all values by "uid=uid\3Dl.dap\2Cou\3Dpeople\2Cdc\3dexample\2Cdc\3Dcom,cn=auth", (=0) 
5d5db13a <= check a_dn_pat: self
5d5db13a <= check a_dn_pat: cn=admin,dc=example,dc=com
5d5db13a <= check a_set_pat: [cn=ldapadmins,ou=groups,dc=example,dc=com]/member* & user
5d5db13a => mdb_entry_get: found entry: "cn=ldapadmins,ou=groups,dc=example,dc=com"
5d5db13a   ACL set[0]=cn=globaladmins,ou=groups,dc=example,dc=com
5d5db13a => mdb_entry_get: found entry: "cn=globaladmins,ou=groups,dc=example,dc=com"
5d5db13a   ACL set[0]=cn=globaladmins,ou=groups,dc=example,dc=com
5d5db13a   ACL set[1]=cn=admin,dc=example,dc=com
5d5db13a   ACL set[2]=uid=l.dap,ou=people,dc=example,dc=com
5d5db13a => mdb_entry_get: found entry: "cn=admin,dc=example,dc=com"
5d5db13a <= mdb_entry_get: failed to find attribute member
5d5db13a => mdb_entry_get: found entry: "uid=l.dap,ou=people,dc=example,dc=com"
5d5db13a <= mdb_entry_get: failed to find attribute member
5d5db13a   ACL set: empty
5d5db13a <= check a_dn_pat: users
5d5db13a <= acl_mask: [4] applying read(=rscxd) (stop)
5d5db13a <= acl_mask: [4] mask: read(=rscxd)
5d5db13a => slap_access_allowed: write access denied by read(=rscxd)
5d5db13a => access_allowed: no more rules
write access to description: DENIED



On 21. Aug 2019, at 19:14, Dieter Klünter <dieter@dkluenter.de> wrote:

Am Wed, 21 Aug 2019 10:50:19 +0200
schrieb Ondřej Kuzník <ondra@mistotebe.net>:

On Tue, Aug 20, 2019 at 10:22:56PM +0200, Martin W. wrote:
Dear OpenLDAP technical list,

I‘ve been running into a little problem with my permission
structures – and was wondering if you could help me with it.

I want the members of a group to administer a tree structure, the
group is member of it. I've tried some acl settings – I'll post my
trials below the basic structure.

I've tried some different things ... and none Regex was successful
:( Since I'll post some fragments, I put every LDIF fragment within
such a bash fragment:

olcAccess: to *
          by self write
          by dn="cn=admin,dc=example,dc=com" write
          by
set="[cn=ldapadmins,ou=groups,dc=example,dc=com]/member* & user"
write by users read by * none  

trial 1

olcAccess: to
dn.regex="([^,]+,)?o=([^,]+),ou=entities,dc=example,dc=com" by
self write by dn="cn=admin,dc=example,dc=com" write
          by
set="[cn=ldapadmins,ou=groups,dc=example,dc=com]/member* & user"
write by
set.expand="[cn=admin,o=$2,ou=entities,dc=example,dc=com]/member*
& user" write by set="this/member* & user" read by * none  

The result is, that admin and any member of ldapadminscan edit, the
members of specific entity admin subgroups cannot edit.
The specific admin subgroups cannot even see the entities subtree.  

Hi Martin,
what is the order of the above two olcAccess statements? If they apply
in the order above, it seems the first one will always apply and
processing will stop there. In that case you either want to add a
"break" in the first one or split/move it to be checked later.

I assume you also know and use the slapacl tool (and loglevel acl) to
test with? Does it show any additional information that might be
helpful in diagnosing the issue?

With regard to 'set' here is some basic information.
http://www.openldap.org/faq/data/cache/1133.html
http://www.openldap.org/faq/data/cache/1134.html

-Dieter

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