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Re: [Fedora-directory-devel] Attribute to determine allowed write attributes?



Andrew Bartlett wrote:
On Fri, 2006-11-03 at 01:46 +0100, Pierangelo Masarati wrote:
Andrew Bartlett wrote:
Sorry, this seems a bit recursive. I'm lost.
In fact, it is. The point is that what you're asking for may not comply with the ACL model of most DSA implementations, which usually is a desirable model for a number of reasons. What you need is a "cooperative" DSA administrator that agrees to use only a subset of the ACL semantics so that their effect can be computed a priori, without any knowledge of the values that are/will be stored in the attributes. Under this assumption, implementing the feature you desire should be straightforward.

Or you simply ignore checks for value when evaluating the ACL, and
declare that the attribute may be written to if there is any possible
valid value.

That should be enough for GUI writers to use for simple user-feedback,
with a more detailed error reported to a user on the actual modify
failure.
I've just written a toy module for OpenLDAP (HEAD; haven't checked with earlier versions) that returns the allowedAttributes and allowedAttributesEffective based on the assumption that ACLs do not depend on attribute values. You can download it from <http://www.sys-net.it/~ando/Download/allowed.c>. Its transposition to FDS __should__ be straightforward. I plan to submit it as a contrib to OpenLDAP. BTW, can you point me to the schema definition of allowedAttributes and allowedAttributesEffective?

p.



Ing. Pierangelo Masarati
OpenLDAP Core Team

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