Re: (ITS#8882) Null Attribute Value Overlay

[michael@stroeder.com]

This is a cryptographically signed message in MIME format.

--------------ms030107030309090109010404
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: quoted-printable

On 07/24/2018 11:17 AM, tamim.ziai@daasi.de wrote:
> The eds overlay eliminates empty values of type directory string
> (OID 1.3.6.1.4.1.1466.115.121.1.15) from the list of the values in the
> following manner:
>=20
> =C3=82=C2=A0=C3=82=C2=A0=C3=82
   ^^^^^
(Jitterbug has big deficiencies processing Unicode chars in e-mails.=20
I've reformatted what came through.)

Sorry, for nit-picking a bit:

>  - add: All empty attribute values will be removed before the add reque=
st
>    is executed

What happens if after removing all empty values there are no attributes=20
at all anymore? Is the add operation still processed or just internally=20
abandoned/canceled?

>  - mod-replace: A replace with empty values will be modified to a repla=
ce
>    without values. As result the attribute will be deleted

Maybe it's just a wording issue. But I understand "As result the=20
attribute will be deleted" that the attribute in the target entry is=20
removed.

What happens exactly if all empty values are removed from a MOD_REPLACE=20
attribute list? Is the MOD_REPLACE for this attribute removed from the=20
modify operation? This would mean no change to the target entry.
Or do you remove the attribute in the entry?

>  - mod-add: All empty attribute values will be removed before the mod-a=
dd
>    request is executed

"mod-add request" is a bit blurry:
What happens exactly if all empty values are removed from a MOD_ADD=20
attribute list? Is the MOD_ADD for this attribute removed from the=20
modify operation?

>  - mod-delete: All empty attribute values will be removed before the
>    mod-delete request is executed

Again: What happens exactly if all empty values are removed from a=20
MOD_DEL attribute list?

Is the MOD_DEL for this attribute removed from the modify operation?

Or is the MOD_DEL processed with empty attribute list?
IMO this would be harmful because it would alter the processing in a way =

probably not intended by the client.

I vaguely remember that this is meant to deal with broken clients and=20
I'm concerned that following the README all clients are affected by this =

special processing. Wouldn't it make sense to limit the functionality to =

a defined group of broken LDAP clients (by group membership, peer=20
address check or similar)?

Ciao, Michael.


--------------ms030107030309090109010404
Content-Type: application/pkcs7-signature; name="smime.p7s"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="smime.p7s"
Content-Description: S/MIME Cryptographic Signature
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==
--------------ms030107030309090109010404--