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Subject: RE: [security-services] Groups - sstc-saml-MetadataDiscoveryProtocols-2.0-draft-00.pdf uploaded

Anothny -
Please see embedded responses below, prefixed with [jm].

Jahan Moreh
Chief Security Architect

-----Original Message-----
From: Anthony Nadalin [mailto:drsecure@us.ibm.com]
Sent: Tuesday, October 14, 2003 11:56 AM
To: security-services@lists.oasis-open.org
Subject: Re: [security-services] Groups -
sstc-saml-MetadataDiscoveryProtocols-2.0-draft-00.pdf uploaded


Couple of questions:

(1) Why include the DNS proposal, what is the motivation, scenarios driving
this to be included ? Will anyone implement ?

[jm] First, please note that this is optional and not required. The motivation is to tie metadata location discovery with a known discovery protocol and repository such as DNS. I personally think it makes sense. Will anyone implement? I certainly cannot answer this question.
(2) How does one find out the "well known URL" ? Do I assume that the URL
may not be the resource but may inquire against something else ? Are there
length restrictions ? What is the assumed response from the URL ?

[jm] The URL is exchanged out of band; that's why it's "well known".  Incidentally, the URL will be the assertionProducer or the assertionConsomer unique ID. There are no length restrictions beyond what is already imposed on URLs (2K, I think). The URL, when dereferenced, will produce an XML document which is the provider's metadata (which includes supported profiles, end-points, etc).

(3) Is there just 1 "well known URL" per service end point ?

[jm] The URLs are not per service end points but per provider. Given the relationship between a provider and a providerID, there is one well known URL per provider. If a provider chooses to offer its services via two different providerIDs, then that is OK, but from the standpoint of this schema/proposal, this is viewed as two distinct providers.

(4) if I don't know the service end point how do I find the  "well known
URL" ?

[jm] The notion of a well known URL assumes that you know it a-priori. The underlying assumption is that you need not "discover" the URL, it is already known to you.

Anthony Nadalin | work 512.436.9568 | cell 512.289.4122

|         |           jmoreh@sigaba.com|
|         |                            |
|         |           10/01/2003 06:43 |
|         |           PM               |
  |                                                                                                                                              |
  |       To:       security-services@lists.oasis-open.org                                                                                       |
  |       cc:                                                                                                                                    |
  |       Subject:  [security-services] Groups - sstc-saml-MetadataDiscoveryProtocols-2.0-draft-00.pdf uploaded                                  |

The document sstc-saml-MetadataDiscoveryProtocols-2.0-draft-00.pdf has been
submitted by Jahan Moreh (jmoreh@sigaba.com) to the OASIS Security Services
TC document repository.

Document Description:
This document is a proposal for SAML 2.0 work Item W-3. It describes a
proposal for Metadata Discovery Protocol. The proposal described in this
document borrows extensively from the metadata discovery protocol defined
in the draft Liberty Alliance 1.2 specifications. An MS word version is
also available.

Download Document:

View Document Details:

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