[Date Prev][Date Next]
[Chronological]
[Thread]
[Top]
chaining SASL binds (Was: [ldapext] Chained Operation (control, extended op, or op?))
I changed the subject as it likely best to separate this
discussion from the more general chained operation discussion.
At 12:54 AM 6/25/2004, Ramsay, Ron wrote:
>It seems a funny model. The X.500 approach would be to bind to the other DSA at the appropriate authentication level and pass the requester and the auth level in the request. In fact, I don't even understand what is meant by chaining SASL bind exchanges as some of these would be point to point and no third party would/should be able to participate.
s/no third party/no untrusted third party (e.g., an attacker)/
Mechanisms are often designed to offer protection from MITM attack.
While these mechanisms can make it hard for trusted 3rd parties
to participate in the exchange, they don't generally preclude
such participation. It is often possible for trusted 3rd
parties to participate without losing the MITM protective
services.
The reason why I want to formalize a mechanism for trusted 3rd
party participation is to ensure the MITM protective services
are preserved.
Kurt
>-----Original Message-----
>From: ldapext-bounces@ietf.org [mailto:ldapext-bounces@ietf.org]On
>Behalf Of Mark Ennis
>Sent: Friday, 25 June 2004 16:47
>To: Kurt D. Zeilenga
>Cc: ldapext@ietf.org; Jim Sermersheim
>Subject: Re: [ldapext] Chained Operation (control, extended op, or op?)
>
>
>Kurt D. Zeilenga wrote:
>> BTW, I'd like to add support for chaining SASL bind exchanges.
>> This will require some fields beyond those offered by the
>> X.518 ChainingArguments/ChainingResults structures.
>
>I agree that a mechanism for chaining SASL bind exchanges would be
>useful, however, current chaining mechanisms (e.g. X.518 or LDAP
>referrals) depend on name resolution of a base object. The bind
>operation, particularly when using a SASL mechanism, does not have a
>base object for the name resolution process. This would mean special
>procedures for "chaining" this operation.
>
>Does this also require formalising some type of trust model between DSAs
>if we are going to delegate authentication operations to another server?
>
>Is it possible to translate this SASL bind exchange into a LDAP
>operation the initiating DSA invokes, e.g. a search for the SASL
>"username" with a control used to transmit the SASL credentials and
>receive the SASL auth-response? Such an operation may then be chained by
>the responding DSA(s) and authorization decisions will be done using the
>initiating DSA as the authorization identity?
>
>- Mark.
>
>>
>> Kurt
>>
>>
>> _______________________________________________
>> Ldapext mailing list
>> Ldapext@ietf.org
>> https://www1.ietf.org/mailman/listinfo/ldapext
>
>_______________________________________________
>Ldapext mailing list
>Ldapext@ietf.org
>https://www1.ietf.org/mailman/listinfo/ldapext
>
>
>_______________________________________________
>Ldapext mailing list
>Ldapext@ietf.org
>https://www1.ietf.org/mailman/listinfo/ldapext
_______________________________________________
Ldapext mailing list
Ldapext@ietf.org
https://www1.ietf.org/mailman/listinfo/ldapext