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package com.totalbanco.framework.josso.web;


import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.totalbanco.framework.orion.TBAppConfig;
import com.totvslabs.idm.protocol.saml2toolkit.common.OpenSAMLInitializer;
import com.totvslabs.idm.protocol.saml2toolkit.common.PropertyObject;
import com.totvslabs.idm.protocol.saml2toolkit.common.User;
import com.totvslabs.idm.protocol.saml2toolkit.responseVerify.ResponseProcessor;


/**
 * This class will receive SAML response from the IDP
 *
 */
public class AssertionConsumerService extends HttpServlet {
	
	private final static Logger logger = LoggerFactory.getLogger(AssertionConsumerService.class);
	
	private static final long serialVersionUID = 1L;
	
	@Override
	public void init() {
		try {
			//initialize the library
			OpenSAMLInitializer initOpenSaml = new OpenSAMLInitializer();
			initOpenSaml.initializeLibrary();						
		}catch (Exception e){
			logger.error("Exception occurred while initializing the OpenSaml library: " + e.getMessage());
		}
	}
	
	@Override
	public void doGet(final HttpServletRequest httpRequest, final HttpServletResponse httpResponse) throws ServletException, IOException {
		logger.debug("received a GET");
		receiveResponse(httpRequest, httpResponse);
	}
	@Override
	public void doPost(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException {	
		logger.debug("received a POST");
		receiveResponse(request, response);
	}	
	
	private void receiveResponse(HttpServletRequest httpRequest, HttpServletResponse httpResponse) {
		logger.debug("receieved a SAML Response");
		
		try {
			final TBAppConfig tbAppConfig = (TBAppConfig) httpRequest.getSession().getServletContext().getAttribute(TBAppConfig.COMPONENT_NAME);
			
			final PropertyObject propObj = new PropertyObject();
		    propObj.setClockSkew(tbAppConfig.getParametros().get("autenticacaoClockSkew"));
		    propObj.setSpIssuerName(tbAppConfig.getParametros().get("autenticacaoSpIssuerName"));
		    propObj.setSpProtocolBinding(tbAppConfig.getParametros().get("autenticacaoSpProtocolBinding"));
		    propObj.setAcsUrl(tbAppConfig.getParametros().get("autenticacaoAcsURL"));
		    propObj.setIdpProtocolBinding(tbAppConfig.getParametros().get("autenticacaoIdpProtocolBinding"));
		    propObj.setProviderName(tbAppConfig.getParametros().get("autenticacaoProviderName"));
		    propObj.setNameIdFormat(tbAppConfig.getParametros().get("autenticacaoNameIdFormat"));
		    propObj.setRelayState(tbAppConfig.getParametros().get("autenticacaoRelayState"));
		    propObj.setIdpIssuerName(tbAppConfig.getParametros().get("autenticacaoIdpIssuerName"));
		    propObj.setIdpDestination(tbAppConfig.getParametros().get("autenticacaoIdpDestination"));
		    propObj.setCertificateFile(tbAppConfig.getParametros().get("autenticacaoCertificateFile"));
		    propObj.setIdpCertIssuerName(tbAppConfig.getParametros().get("autenticacaoIdpCertIssuerName"));
			
		    logger.debug("ResponseProcessor.processResponse() will be executed with properties bellow:");
		    logger.debug("ClockSkew: " + propObj.getClockSkew());
		    logger.debug("SpIssuerName: " + propObj.getSpIssuerName());
		    logger.debug("SpProtocolBinding: " + propObj.getSpProtocolBinding());
		    logger.debug("AcsUrl: " + propObj.getAcsUrl());
		    logger.debug("IdpProtocolBinding: " + propObj.getIdpProtocolBinding());
		    logger.debug("ProviderName: " + propObj.getProviderName());
		    logger.debug("NameIdFormat: " + propObj.getNameIdFormat());
		    logger.debug("RelayState: " + propObj.getRelayState());
		    logger.debug("IdpIssuerName: " + propObj.getIdpIssuerName());
		    logger.debug("IdpDestination: " + propObj.getIdpDestination());
		    logger.debug("CertificateFile: " + propObj.getCertificateFile());
		    
		    final ResponseProcessor responseProcessor = new ResponseProcessor();
		    final User user = responseProcessor.processResponse(httpRequest, httpResponse, propObj);
		
			logger.debug("Usuário autenticado: " + user.getUsername());
			
			httpRequest.getSession(true).setAttribute("userFluig", user);
			httpResponse.sendRedirect(httpRequest.getContextPath() +  "/signon/login.htm");
		
		} catch(Exception e) {
			logger.error("Exception while processing the response: " + e.getMessage());
		}
	}
}