[SSSD-users] sssd basic questions - solved
Michael Ströder
michael at stroeder.com
Mon Jun 9 22:42:05 UTC 2014
Dmitri Pal wrote:
> On 06/09/2014 01:56 PM, Robert Zmijan wrote:
>> OK, I understand why it should not be able to read passwords. However,
>> under 'access to attrs=userPassword' in my slapd.conf if I comment out
>> the line 'by dn="userid=sssd,ou=People,dc=myhost,dc=net" read' the sssd
>> cannot establish a successful bind. In consequence I cannot login any
>> user in. What is the best way to allow sssd to read its own password but
>> not allow to access to others' passwords?
>>
>> Below my slapd.conf
>>
>> ---------------
>> access to dn="cn=subschema"
>> by * read
>>
>> access to attrs=userPassword
>> by dn="uid=root,ou=People,dc=myhost,dc=net" write
>> by dn="userid=sssd,ou=People,dc=myhost,dc=net" read
>> by self write
>> by anonymous auth
>> by * auth
>>
>> access to attrs=sshPublicKey
>> by dn="uid=root,ou=People,dc=myhost,dc=net" write
>> by self write
>> by * read
>>
>> access to *
>> by dn="cn=user1,ou=People,dc=myhost,dc=net" read
>> by dn="uid=user3,ou=People,dc=myhost,dc=net" write
>> by dn="uid=user2,ou=People,dc=myhost,dc=net" write
>> by dn="uid=root,ou=People,dc=myhost,dc=net" write
>> by dn="userid=sssd,ou=People,dc=myhost,dc=net" read
>> by * search
>
> Can you bind with sssd user and its password via an LDAP search command with
> or without this setting?
> You should be able to because when you remove the line sssd would authenticate
> as itself and thus self rules would apply.
> If this is possible that means that your password is OK and the problem is in
> SSSD. If it failes this means that your password for SSSD user is not correct
> (may be it requires change).
Dealing with OpenLDAP ACLs is rather off-topic here.
But I feel it's appropriate to point to this FAQ entry:
http://www.openldap.org/faq/data/cache/320.html
Hint: Even sssd does not have to read its own password hash.
You can safely omit this line
by anonymous auth
because there's already this last line
by * auth
More details in the OpenLDAP Faq-O-Matic and slapd.access(5). Feel free to ask
OpenLDAP ACL questions on the openldap-technical mailing list.
And yes, try to test by simulating with ldapsearch like Dmitri suggested.
Ciao, Michael.
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