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<p class="MsoNormal"><span style="font-size:11.0pt">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">We have a need to implement impersonation is IDP. We are using MFA flow and the primary authentication is RemoteUser. I’m wondering if it is possible to switch user identity in mf</span><span style="font-size:8.5pt;font-family:"Menlo",sans-serif;color:black">a</span><span style="font-size:11.0pt">-authn-config.xml<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">after user finish DUO. I tired modifying mfa-authn-config.xml without success.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">With the code below, I got warning<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">2017-08-21 10:18:27,025| - WARN [net.shibboleth.idp.authn.impl.FinalizeAuthentication:203] - Profile Action FinalizeAuthentication: Result of authentication (hy93) does not match existing subject in context
(foo)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">2017-08-21 10:18:27,044| - WARN [org.opensaml.profile.action.impl.LogEvent:105] - A non-proceed event occurred while processing the request: InvalidSubjectContext<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">mfa-authn-config.xml<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <util:map id="shibboleth.authn.MFA.TransitionMap"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <entry key=""><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <bean parent="shibboleth.authn.MFA.Transition" p:nextFlow="authn/RemoteUser" /><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </entry><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <!--<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> Second rule runs a function if RemoteUser succeeds, to determine whether an additional<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> factor is required.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> --><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <entry key="authn/RemoteUser"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <bean parent="shibboleth.authn.MFA.Transition" p:nextFlowStrategy-ref="checkSecondFactor" /><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </entry><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <entry key="authn/Duo"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <bean parent="shibboleth.authn.MFA.Transition" p:nextFlowStrategy-ref="checkImpersonation" /><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </entry><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <!-- An implicit final rule will return whatever the final flow returns. --><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </util:map><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <bean id="checkImpersonation " parent="shibboleth.ContextFunctions.Scripted" factory-method="inlineScript"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> p:customObject-ref="shibboleth.AttributeResolverService"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <constructor-arg><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <value><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <![CDATA[<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> nextFlow = null;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> // Go straight to second factor if we have to, or set up for an attribute lookup first.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> authCtx = input.getSubcontext("net.shibboleth.idp.authn.context.AuthenticationContext");<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> c14nCtx = input.getSubcontext("net.shibboleth.idp.authn.context.SubjectCanonicalizationContext");<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> extCtx = authCtx.getSubcontext("net.shibboleth.idp.authn.context.ExternalAuthenticationContext");<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> usernameLookupStrategyClass<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> = Java.type("net.shibboleth.idp.session.context.navigate.CanonicalUsernameLookupStrategy");<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> usernameLookupStrategy = new usernameLookupStrategyClass();<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> //code to check if authenticated user is allowed to impersonate to user “foo” for this relying party.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> …<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> //experiment code to switch user’s identity to foo<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> input.getSubcontext("net.shibboleth.idp.authn.context.SubjectContext", true).setPrincipalName("foo");<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> UsernamePrincipalClass = Java.type("net.shibboleth.idp.authn.principal.UsernamePrincipal");<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> UsernamePrincipal = new UsernamePrincipalClass("foo");<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> SubjectClass = Java.type("javax.security.auth.Subject");<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> s = new SubjectClass();<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> s.getPrincipals().add(UsernamePrincipal);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> extCtx.setPrincipalName("foo");<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> extCtx.setSubject(s);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> c14nCtx.setPrincipalName("foo");<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> c14nCtx.setSubject(s);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> nextFlow; // pass control to second factor or end with the first<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> ]]><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </value><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </constructor-arg><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </bean><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thank you in advance,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Hong<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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