Collectives™ on Stack Overflow

Find centralized, trusted content and collaborate around the technologies you use most.

Teams

Q&A for work

Connect and share knowledge within a single location that is structured and easy to search.

Our Java app is federated with customers ADFS 3.0 server. There is an issue after sending authentication requests (SP initiated) to ADFS server over SAMLP. It is for intranet use case, where windows authentication was specified on ADFS server in authentication policy. SP app is using ForgeRock's Fedlet library that is forcibly sending RequestedAuthnContext attribute withing SAML authentication request :

samlp:RequestedAuthnContext xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol"
                             Comparison="exact"
    <saml:AuthnContextClassRef xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">urn:oasis:names:tc:SAML:2.0:ac:classes:Password</saml:AuthnContextClassRef>
</samlp:RequestedAuthnContext>
We had initially also issue with extranet authentication, where Forms authentication was selected on ADFS. We have solved that with adding Claim custom rule for our RP :
exists([Type == "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier"]) => issue(Type = "http://schemas.microsoft.com/ws/2008/06/identity/claims/authenticationmethod", Value = "urn:oasis:names:tc:SAML:2.0:ac:classes:Password");
Now we are stacked down with intranet use case. 
On ADFS side we got following error :
MSIS7102: Requested Authentication Method is not supported on the STS.
   at Microsoft.IdentityServer.Web.Authentication.GlobalAuthenticationPolicyEvaluator.EvaluatePolicy(IList`1 mappedRequestedAuthMethods, AccessLocation location, ProtocolContext context, HashSet`1 authMethodsInToken, Boolean& validAuthMethodsInToken)
   at Microsoft.IdentityServer.Web.Authentication.AuthenticationPolicyEvaluator.RetrieveFirstStageAuthenticationDomain(Boolean& validAuthMethodsInToken)
   at Microsoft.IdentityServer.Web.Authentication.AuthenticationPolicyEvaluator.EvaluatePolicy(Boolean& isLastStage, AuthenticationStage& currentStage, Boolean& strongAuthRequried)
   at Microsoft.IdentityServer.Web.PassiveProtocolListener.GetAuthMethodsFromAuthPolicyRules(PassiveProtocolHandler protocolHandler, ProtocolContext protocolContext)
   at Microsoft.IdentityServer.Web.PassiveProtocolListener.GetAuthenticationMethods(PassiveProtocolHandler protocolHandler, ProtocolContext protocolContext)
   at Microsoft.IdentityServer.Web.PassiveProtocolListener.OnGetContext(WrappedHttpListenerContext context)
Could I add/do something for it ? Is it possible to say in custom rules IF IT IS INTRANET, AUTH METHOD IS WINDOWS or something like that?
We have solved this by sending more authentication options and specifying Comparison to minimum
<samlp:RequestedAuthnContext xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol"
                             Comparison="minimum"
    <saml:AuthnContextClassRef xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">urn:oasis:names:tc:SAML:2.0:ac:classes:unspecified</saml:AuthnContextClassRef>
    <saml:AuthnContextClassRef xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">urn:oasis:names:tc:SAML:2.0:ac:classes:Password</saml:AuthnContextClassRef>
    <saml:AuthnContextClassRef xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport</saml:AuthnContextClassRef>
    <saml:AuthnContextClassRef xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">urn:oasis:names:tc:SAML:2.0:ac:classes:Kerberos</saml:AuthnContextClassRef>
    <saml:AuthnContextClassRef xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">urn:federation:authentication:windows</saml:AuthnContextClassRef>
</samlp:RequestedAuthnContext>
        
Thanks for contributing an answer to Stack Overflow!
Please be sure to answer the question. Provide details and share your research!
But avoid …
Asking for help, clarification, or responding to other answers.
Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.