[Samba] Kerberos and Samba
Gémes Géza
geza at kzsdabas.sulinet.hu
Mon Apr 12 19:23:05 GMT 2004
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Andrew Bartlett írta:
| On Mon, Apr 12, 2004 at 12:21:41PM +0200, Gémes Géza wrote:
|
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|>Sensei írta:
|>| On Sat, 2004-04-10 at 16:07, Andrew Bartlett wrote:
|>|
|>|
|>|>Samba cannot use the kerberos tickets directly - not unless the KDC is
|>|>Active Directory (for now). But it is possible for Samba to use the
|>|>same password store. (For NTLM, but not kerberos passwords)
|>|>
|>|>What is your KDC? MIT or Heimdal? Are you using the Heimdal LDAP
|>backend?
|>|
|>|
|>| MIT K5. The passwords are stored only in the kerberos database.
|>|
|>|
|>|>While the work is still new, there is support in Heimdal to read Samba
|>|>password entries in LDAP. There is also an OpenLDAP plugin to set
|>|>both Samba and Kerberos passwords on password change.
|>|>
|>|>You would need to manually edit your LDAP database, to expose the
|>|>passwords in 'Samba' format - potentially a dump and restore of the
|>|>Heimdal entries might do it, if the sambaSamAccount objectClass was
|>|>added, and you used a current snapshot.
|>|
|>|
|>| It would be nice to have just kerberos passwords. I've done this with
|>| ldap (sasl gssapi authentication via k5) and afs (tokens are released on
|>| ticket releasing).
|>|
|>| The main issue is the integrated windows login: a student must login,
|>| gain tickets and token, and have his windows home dir set to what ldap
|>| shows him: this means that afs must be enabled at boot.
|>|
|>| How would you do this? I don't have any clues...
|>|
|>I see a different solution here:
|>User authenticate to a Samba controled Domain, and because Samba has the
|>Kerberos password(=NTPassword hash) it could impersonate the user,
|>accting to the AFS/Coda cell on behalf of her/him. In this way Samba
|>could become a gateway between Windows clients and AFS/Coda servers.
|>Unfortunatelly I don't know how could be that implemented.
|
|
| See Volker's presentation to SambaXP, and the --with-fake-kaserver
| option to Samba.
|
Sorry for beeing so tenace on this (maybe unimportant) subject. But this
is what I've understand about what fake-kaserver does:
___________ _____________ _____________
| | | | | |
| Windows |--Kerberos-->| Samba |----------->| AFS |
| client | auth | server | | cel |
|_________| |___________| |___________|
~ ^
~ |
~ |
~ |
~ |
~ |
_____Ç______
| |
| AD |
| server |
|__________|
But what I was thinking about would be:
___________ _____________ _____________
| | | | | Coda |
| Windows |----NTLM---->| Samba |----------->| or |
| client | auth | PDC | | AFS |
|_________| |_LDAP back_| |____cel____|
^
|
| getting ticket
| for
| Kerberos unaware clients
______Ç______
| |
| Heimdal |
| current |
|_LDAP back_|
Thanks,
Geza
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