custom nameid formats and metadata-driven config

[Peter Schober]

* Les LaCroix via users <users at shibboleth.net> [2022-08-04 08:09]:
> When I comment that out and put the following in the SP's metadata file,
> the aacli output no longer includes a saml2:Subject:
> 
>    <md:Extensions>
>       <mdattr:EntityAttributes>
>          <saml:Attribute Name="
> http://shibboleth.net/ns/profiles/nameIDFormatPrecedence"
>                NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri">
> 
> <saml:AttributeValue>urn:oid:0.9.2342.19200300.100.1.1</saml:AttributeValue>
>          </saml:Attribute>
>       </mdattr:EntityAttributes>
>    </md:Extensions>

Not an answer to your question but none of the above (metadata-driven
IDP configuration) is necessary to signal what NameID an SP should
recieve: That's covered in plain old SAML 2.0 Metadata itself:

  <NameIDFormat>urn:oid:0.9.2342.19200300.100.1.1</NameIDFormat>

HTH,
-peter