saml_login not found 404
i am trying to configure sso in aem 6.3. After IDP is redirecting to /saml_login url on aem, i am getting 404 error. In aem logs I can see below messages:
08.12.2017 17:15:18.244 *INFO* [CM Event Dispatcher (Fire ConfigurationEvent: pi d=com.adobe.granite.auth.saml.SamlAuthenticationHandler)] com.adobe.granite.auth .saml Service [com.adobe.granite.auth.saml.SamlAuthenticationHandler,59547, [org .apache.sling.auth.core.spi.AuthenticationHandler]] ServiceEvent REGISTERED
08.12.2017 17:15:42.778 *DEBUG* [qtp1363622188-331043] com.adobe.granite.auth.sa ml.SamlAuthenticationHandler Could not retrieve SP's private key: Uninitialised key store for user authentication-service
I have added the idp public store in trust store and added alias on saml handler. Need suggestion on what could be the issue here.