mod_auth_kerb realm stripping

[Chris Cowley]

On 13 Oct, 17:28, Chris Cowley <chriscowleyso... at googlemail.com>
wrote:
> Hello all
>
> I am trying to tweak my mod_auth_kerb setup. Currently it works
> nicely, I am able to authenticate to web pages on our intranet and
> everything is dandy.
>
> The problem I am having is the contents of Apache's REMOTE_USER
> variable. Currently it has my REALM on the end, which I do not want. I
> have upgraded to mod_auth_kerb 5.4 which introduced an
> "KrbLocalUserMapping" option. As you can see in the log below it
> rewriting my principal, but then I am not found in AD. the value I am
> being re-written to matches my sAMAccount name, so it should be found.
>
> [Tue Oct 13 17:13:26 2009] [debug] src/mod_auth_kerb.c(1578): [client
> 172.19.77.8] kerb_authenticate_user entered with user (NULL) and
> auth_type Kerberos
> [Tue Oct 13 17:13:26 2009] [debug] src/mod_auth_kerb.c(1213): [client
> 172.19.77.8] Acquiring creds for HTTP/svn.snellwilcox.local
> [Tue Oct 13 17:13:26 2009] [debug] src/mod_auth_kerb.c(1335): [client
> 172.19.77.8] Verifying client data using KRB5 GSS-API
> [Tue Oct 13 17:13:26 2009] [debug] src/mod_auth_kerb.c(1351): [client
> 172.19.77.8] Client didn't delegate us their credential
> [Tue Oct 13 17:13:26 2009] [debug] src/mod_auth_kerb.c(1370): [client
> 172.19.77.8] GSS-API token of length 161 bytes will be sent back
> [Tue Oct 13 17:13:26 2009] [debug] src/mod_auth_kerb.c(1484): [client
> 172.19.77.8] kerb_authenticate_a_name_to_local_name
> ChrisCow... at SNELLWILCOX.LOCAL -> ChrisCowley
> [Tue Oct 13 17:13:26 2009] [debug] mod_authnz_ldap.c(561): [client
> 172.19.77.8] ldap authorize: Creating LDAP req structure
> [Tue Oct 13 17:13:26 2009] [debug] mod_authnz_ldap.c(573): [client
> 172.19.77.8] auth_ldap authorise: User DN not found, User not found
>
> http.conf:
> AuthType Kerberos
>         AuthName "Subversion - use your SNELLWILCOX domain login (as
> used to log in to Windows"
>         Krb5Keytab /etc/kerberos/svn.keytab
>         KrbVerifyKDC On
>         KrbMethodNegotiate On
>         KrbMethodK5Passwd On
>         KrbAuthRealms SNELLWILCOX.LOCAL
>         KrbLocalUserMapping on
>
>         AuthLDAPBindDN <binddn>
>         AuthLDAPBindPassword <password>
>         AuthLDAPURL
> ldap://<windoze_dn>/OU=SnellWilcox,DC=snellwilcox,DC=local?userPrincipalName,sAMAccountName,mail,displayname,cn?sub?(objectClass=*)
>
>         require ldap-attribute
> msSFU30PosixMemberOf="CN=SG_Linux_CVS_IT,OU=Linux Authentication
> Groups,OU=Security Groups,OU=SnellWilcox,DC=snellwilcox,DC=local"


Also, if anyone has a better way to do it (mod_rewrite) that would be
considered.