Azure B2C integration with SPID

Hi.

I was wondering if everyone knows if azure B2C could be configured as a service provider with SPID acting as Identity provider. SPID is the authentication system that allows citizens to access online services of the Italian public administration entities.

SPID is SAML based but needs some customizations of saml authentication request, here some details unfortunately only in italian: https://docs.italia.it/italia/spid/spid-regole-tecniche/it/stabile/single-sign-on.html ).

Basically, compared to standard SAML, NameQualifier  attribute is mandatory and it is necessary to include <RequestedAuthnContext> tag. Here an example:

samlp:RequestedAuthnContext Comparison="minimum">
    <saml:AuthnContextClassRef>
        https://www.spid.gov.it/SpidL2
    </saml:AuthnContextClassRef>
</samlp:RequestedAuthnContext>

Thanks.