Examples with Assertion com.sun.identity.saml2.assertion.Assertion used on opensource projects

Example 31 with Assertion

use of com.sun.identity.saml2.assertion.Assertion in project OpenAM by OpenRock.

the class IDPSSOUtil method getAssertion.

/**
     * Returns a <code>SAML Assertion</code> object
     *
     * @throws SAML2Exception if the operation is not successful
     * @param request The HTTP request.
     * @param session The user's session object.
     * @param authnReq The <code>AuthnRequest</code> object.
     * @param recipientEntityID The entity ID of the response recipient.
     * @param idpEntityID The entity ID of the identity provider.
     * @param realm The realm name.
     * @param nameIDFormat The <code>NameIDFormat</code>.
     * @param acsURL The <code>ACS</code> service <code>url</code>.
     * @param affiliationID AffiliationID for IDP initiated SSO.
     * @param matchingAuthnContext the <code>AuthnContext</code> used to find authentication type and scheme.
     * @return the <code>SAML Assertion</code> object.
     * @throws SAML2Exception if the operation is not successful.
     */
private static Assertion getAssertion(HttpServletRequest request, Object session, AuthnRequest authnReq, String recipientEntityID, String idpEntityID, String idpMetaAlias, String realm, String nameIDFormat, String acsURL, String affiliationID, AuthnContext matchingAuthnContext) throws SAML2Exception {
    String classMethod = "IDPSSOUtil.getAssertion: ";
    Assertion assertion = AssertionFactory.getInstance().createAssertion();
    String assertionID = SAML2Utils.generateID();
    assertion.setID(assertionID);
    assertion.setVersion(SAML2Constants.VERSION_2_0);
    assertion.setIssueInstant(new Date());
    Issuer issuer = AssertionFactory.getInstance().createIssuer();
    issuer.setValue(idpEntityID);
    assertion.setIssuer(issuer);
    List statementList = new ArrayList();
    NewBoolean isNewSessionIndex = new NewBoolean();
    AuthnStatement authnStatement = null;
    IDPSession idpSession = null;
    String sessionIndex = null;
    String sessionID = sessionProvider.getSessionID(session);
    synchronized (sessionID) {
        authnStatement = getAuthnStatement(request, session, isNewSessionIndex, authnReq, idpEntityID, realm, matchingAuthnContext);
        if (authnStatement == null) {
            return null;
        }
        sessionIndex = authnStatement.getSessionIndex();
        if (isNewSessionIndex.getValue()) {
            if (SAML2Utils.debug.messageEnabled()) {
                SAML2Utils.debug.message(classMethod + "This is a new IDP session with sessionIndex=" + sessionIndex + ", and sessionID=" + sessionID);
            }
            idpSession = (IDPSession) IDPCache.idpSessionsBySessionID.get(sessionProvider.getSessionID(session));
            if (idpSession == null) {
                idpSession = new IDPSession(session);
            }
            // Set the metaAlias in the IDP session object
            idpSession.setMetaAlias(idpMetaAlias);
            IDPCache.idpSessionsByIndices.put(sessionIndex, idpSession);
            if ((agent != null) && agent.isRunning() && (saml2Svc != null)) {
                saml2Svc.setIdpSessionCount((long) IDPCache.idpSessionsByIndices.size());
            }
        } else {
            idpSession = (IDPSession) IDPCache.idpSessionsByIndices.get(sessionIndex);
        }
    }
    if (isNewSessionIndex.getValue()) {
        if (SAML2Utils.debug.messageEnabled()) {
            SAML2Utils.debug.message(classMethod + "a new IDP session has been saved in cache, " + "with sessionIndex=" + sessionIndex);
        }
        try {
            sessionProvider.addListener(session, sessionListener);
        } catch (SessionException e) {
            SAML2Utils.debug.error(classMethod + "Unable to add session listener.");
        }
    } else {
        if (idpSession == null && SAML2FailoverUtils.isSAML2FailoverEnabled()) {
            // Read from SAML2 Token Repository
            IDPSessionCopy idpSessionCopy = null;
            try {
                idpSessionCopy = (IDPSessionCopy) SAML2FailoverUtils.retrieveSAML2Token(sessionIndex);
            } catch (SAML2TokenRepositoryException se) {
                SAML2Utils.debug.error(classMethod + "Unable to obtain IDPSessionCopy from the SAML2 Token Repository for sessionIndex:" + sessionIndex, se);
            }
            // Copy back to IDPSession
            if (idpSessionCopy != null) {
                idpSession = new IDPSession(idpSessionCopy);
            } else {
                SAML2Utils.debug.error("IDPSessionCopy is null");
                throw new SAML2Exception(SAML2Utils.bundle.getString("IDPSessionIsNULL"));
            }
        } else if ((idpSession == null) && (!SAML2FailoverUtils.isSAML2FailoverEnabled())) {
            SAML2Utils.debug.error("IDPSession is null; SAML2 failover" + "is disabled");
            throw new SAML2Exception(SAML2Utils.bundle.getString("IDPSessionIsNULL"));
        } else {
            if (SAML2Utils.debug.messageEnabled()) {
                SAML2Utils.debug.message(classMethod + "This is an existing IDP session with sessionIndex=" + sessionIndex + ", and sessionID=" + sessionProvider.getSessionID(idpSession.getSession()));
            }
        }
    }
    statementList.add(authnStatement);
    AttributeStatement attrStatement = getAttributeStatement(session, idpEntityID, recipientEntityID, realm);
    if (attrStatement != null) {
        List attrStatementList = new ArrayList();
        attrStatementList.add(attrStatement);
        assertion.setAttributeStatements(attrStatementList);
    }
    // get the assertion effective time (in seconds)
    int effectiveTime = getEffectiveTime(realm, idpEntityID);
    // get the NotBefore skew (in seconds)
    int notBeforeSkewTime = getNotBeforeSkewTime(realm, idpEntityID);
    // get the subject element
    Subject subject = getSubject(session, authnReq, acsURL, nameIDFormat, realm, idpEntityID, recipientEntityID, effectiveTime, affiliationID);
    // register (spEntityID, nameID) with the sso token
    // for later logout use 
    String spEntityID = null;
    if (authnReq != null) {
        spEntityID = authnReq.getIssuer().getValue();
    } else {
        spEntityID = recipientEntityID;
    }
    NameIDandSPpair pair = new NameIDandSPpair(subject.getNameID(), spEntityID);
    synchronized (IDPCache.idpSessionsByIndices) {
        List<NameIDandSPpair> list = idpSession.getNameIDandSPpairs();
        String id;
        if (authnReq != null) {
            id = authnReq.getIssuer().getValue();
        } else {
            id = spEntityID;
        }
        boolean found = false;
        for (NameIDandSPpair nameIDandSPpair : list) {
            if (nameIDandSPpair.getSPEntityID().equals(id)) {
                found = true;
                break;
            }
        }
        if (!found) {
            list.add(pair);
        }
    }
    assertion.setAuthnStatements(statementList);
    assertion.setSubject(subject);
    Conditions conditions = getConditions(recipientEntityID, notBeforeSkewTime, effectiveTime);
    assertion.setConditions(conditions);
    String discoBootstrapEnabled = getAttributeValueFromIDPSSOConfig(realm, idpEntityID, SAML2Constants.DISCO_BOOTSTRAPPING_ENABLED);
    if ((discoBootstrapEnabled != null) && discoBootstrapEnabled.equalsIgnoreCase("true")) {
        List attrStatementList = assertion.getAttributeStatements();
        if (attrStatementList == null) {
            attrStatementList = new ArrayList();
            assertion.setAttributeStatements(attrStatementList);
        }
        DiscoveryBootstrap bootstrap = new DiscoveryBootstrap(session, subject, authnStatement.getAuthnContext().getAuthnContextClassRef(), spEntityID, realm);
        attrStatementList.add(bootstrap.getBootstrapStatement());
        assertion.setAdvice(bootstrap.getCredentials());
    }
    if (assertionCacheEnabled(realm, idpEntityID)) {
        String userName = null;
        try {
            userName = sessionProvider.getPrincipalName(session);
        } catch (SessionException se) {
            SAML2Utils.debug.error(classMethod + "Unable to get principal name from the session.", se);
            throw new SAML2Exception(SAML2Utils.bundle.getString("invalidSSOToken"));
        }
        String cacheKey = userName.toLowerCase();
        List assertions = (List) IDPCache.assertionCache.get(cacheKey);
        if (assertions == null) {
            synchronized (IDPCache.assertionCache) {
                assertions = (List) IDPCache.assertionCache.get(cacheKey);
                if (assertions == null) {
                    assertions = new ArrayList();
                    IDPCache.assertionCache.put(cacheKey, assertions);
                }
            }
        }
        synchronized (assertions) {
            assertions.add(assertion);
        }
        IDPCache.assertionByIDCache.put(assertionID, assertion);
        if (SAML2FailoverUtils.isSAML2FailoverEnabled()) {
            try {
                SAML2FailoverUtils.saveSAML2Token(assertionID, cacheKey, assertion.toXMLString(true, true), conditions.getNotOnOrAfter().getTime() / 1000);
                if (SAML2Utils.debug.messageEnabled()) {
                    SAML2Utils.debug.message(classMethod + "Saving Assertion to SAML2 Token Repository. ID = " + assertionID);
                }
            } catch (SAML2TokenRepositoryException se) {
                SAML2Utils.debug.error(classMethod + "Unable to save Assertion to the SAML2 Token Repository", se);
            }
        }
    }
    //  Save to SAML2 Token Repository
    try {
        if (SAML2FailoverUtils.isSAML2FailoverEnabled()) {
            long sessionExpireTime = System.currentTimeMillis() / 1000 + (sessionProvider.getTimeLeft(session));
            SAML2FailoverUtils.saveSAML2TokenWithoutSecondaryKey(sessionIndex, new IDPSessionCopy(idpSession), sessionExpireTime);
        }
        if (SAML2Utils.debug.messageEnabled()) {
            SAML2Utils.debug.message(classMethod + "SAVE IDPSession!");
        }
    } catch (SessionException se) {
        SAML2Utils.debug.error(classMethod + "Unable to get left-time from the session.", se);
        throw new SAML2Exception(SAML2Utils.bundle.getString("invalidSSOToken"));
    } catch (SAML2TokenRepositoryException se) {
        SAML2Utils.debug.error(classMethod + "Unable to save IDPSession to the SAML2 Token Repository", se);
    }
    return assertion;
}

Example 32 with Assertion

use of com.sun.identity.saml2.assertion.Assertion in project OpenAM by OpenRock.

the class IDPSSOUtil method getBindingForAcsUrl.

/**
     * Returns the assertion consumer service url binding from
     * the metadata.
     *
     * @param spEntityID the entity id of the service provider
     * @param realm      the realm name of the identity provider
     * @return the assertion consumer service url binding
     * @throws SAML2Exception if the operation is not successful
     */
public static String getBindingForAcsUrl(String spEntityID, String realm, String acsURL) throws SAML2Exception {
    String classMethod = "IDPSSOUtil.getBindingForAcsUrl: ";
    SPSSODescriptorElement spSSODescriptorElement = getSPSSODescriptor(realm, spEntityID, classMethod);
    List acsList = spSSODescriptorElement.getAssertionConsumerService();
    AssertionConsumerServiceElement acs = null;
    String binding = null;
    for (int i = 0; i < acsList.size(); i++) {
        acs = (AssertionConsumerServiceElement) acsList.get(i);
        String location = acs.getLocation();
        if (location != null && location.equals(acsURL)) {
            return acs.getBinding();
        }
    }
    return null;
}

Example 33 with Assertion

use of com.sun.identity.saml2.assertion.Assertion in project OpenAM by OpenRock.

the class IDPSSOUtil method isACSurlValidInMetadataSP.

/**
     * Validates if the Assertion Consumer Service URL acsURL exists in the
     * metadata of the Service Provider spEntityID
     *
     * @param acsURL     the assertion consumer service <code>URL</code>
     * @param spEntityID the entity id of the service provider
     * @param realm      the realm name of the identity provider
     * @return true if the assertion consumer service URL was found
     *         false otherwise
     */
private static boolean isACSurlValidInMetadataSP(String acsURL, String spEntityID, String realm) throws SAML2Exception {
    boolean isValidACSurl = false;
    String classMethod = "IDPSSOUtil.isACSurlValidInMetadataSP: ";
    SPSSODescriptorElement spSSODescriptorElement = getSPSSODescriptor(realm, spEntityID, classMethod);
    List acsList = spSSODescriptorElement.getAssertionConsumerService();
    AssertionConsumerServiceElement acs = null;
    for (int i = 0; i < acsList.size(); i++) {
        acs = (AssertionConsumerServiceElement) acsList.get(i);
        String acsInMeta = acs.getLocation();
        if (acsInMeta.equalsIgnoreCase(acsURL)) {
            isValidACSurl = true;
            SAML2Utils.debug.message(classMethod + " acsURL=" + acsURL + "Found in the metadata");
            break;
        }
    }
    return isValidACSurl;
}

Example 34 with Assertion

use of com.sun.identity.saml2.assertion.Assertion in project OpenAM by OpenRock.

the class IDPSSOUtil method signAndEncryptResponseComponents.

/**
     * Signs and encrypts the components of a <code>SAML Response</code>
     * based on the service provider meta data. If the flag of
     * encrypting <code>Assertion</code> is on, then the embedded
     * <code>Assertion</code> object will be encrypted; if the flag
     * of encrypting <code>Assertion</code> is off and the flag of
     * encrypting <code>NameID</code> is on, then the <code>NameID</code>
     * embedded in the <code>Assertion</code> will be encrypted; if the
     * flag of encrypting <code>Assertion</code> is off and the flag of
     * encrypting <code>Attribute</code> is on, then the
     * <code>Attribute</code> embedded in the <code>Assertion</code>
     * will be encrypted. If the flag signAssertion is on, then the
     * <code>Assertion</code> will be signed. It will be signed before
     * it is encrypted and after its embedded <code>NameID</code> or
     * <code>Attribute</code> is encrypted.
     *
     * @param realm         the realm name of the identity provider
     * @param spEntityID    the entity id of the service provider
     * @param idpEntityID   the entity id of the identity provider
     * @param res           The <code>Response</code> whose components may be
     *                      encrypted based on the service provider meta data setting
     * @param signAssertion A flag to indicate if <code>Assertion</code>
     *                      signing is required
     */
static void signAndEncryptResponseComponents(String realm, String spEntityID, String idpEntityID, Response res, boolean signAssertion) throws SAML2Exception {
    String classMethod = "IDPSSOUtil.signAndEncryptResponseComponents: ";
    boolean toEncryptAssertion = false;
    boolean toEncryptNameID = false;
    boolean toEncryptAttribute = false;
    if (res == null) {
        return;
    }
    List assertions = res.getAssertion();
    if ((assertions == null) || (assertions.size() == 0)) {
        return;
    }
    Assertion assertion = (Assertion) assertions.get(0);
    // get the encryption related flags from the SP Entity Config
    String wantAssertionEncrypted = SAML2Utils.getAttributeValueFromSSOConfig(realm, spEntityID, SAML2Constants.SP_ROLE, SAML2Constants.WANT_ASSERTION_ENCRYPTED);
    toEncryptAssertion = (wantAssertionEncrypted != null) && (wantAssertionEncrypted.equals(SAML2Constants.TRUE));
    if (!toEncryptAssertion) {
        String wantNameIDEncrypted = SAML2Utils.getAttributeValueFromSSOConfig(realm, spEntityID, SAML2Constants.SP_ROLE, SAML2Constants.WANT_NAMEID_ENCRYPTED);
        toEncryptNameID = (wantNameIDEncrypted != null) && (wantNameIDEncrypted.equals(SAML2Constants.TRUE));
        String wantAttributeEncrypted = SAML2Utils.getAttributeValueFromSSOConfig(realm, spEntityID, SAML2Constants.SP_ROLE, SAML2Constants.WANT_ATTRIBUTE_ENCRYPTED);
        toEncryptAttribute = (wantAttributeEncrypted != null) && (wantAttributeEncrypted.equals(SAML2Constants.TRUE));
    }
    if ((!toEncryptAssertion) && (!toEncryptNameID) && (!toEncryptAttribute)) {
        // all encryption flags are off, no encryption needed
        if (signAssertion) {
            signAssertion(realm, idpEntityID, assertion);
            List assertionList = new ArrayList();
            assertionList.add(assertion);
            res.setAssertion(assertionList);
        }
        return;
    }
    SPSSODescriptorElement spSSODescriptorElement = getSPSSODescriptor(realm, spEntityID, classMethod);
    // get the encryption information
    EncInfo encInfo = KeyUtil.getEncInfo(spSSODescriptorElement, spEntityID, SAML2Constants.SP_ROLE);
    if (encInfo == null) {
        SAML2Utils.debug.error(classMethod + "failed to get service provider encryption key info.");
        throw new SAML2Exception(SAML2Utils.bundle.getString("UnableToFindEncryptKeyInfo"));
    }
    if (toEncryptAssertion) {
        // sign assertion first, then encrypt the assertion
        if (signAssertion) {
            signAssertion(realm, idpEntityID, assertion);
        }
        // we only encrypt the Assertion
        EncryptedAssertion encryptedAssertion = assertion.encrypt(encInfo.getWrappingKey(), encInfo.getDataEncAlgorithm(), encInfo.getDataEncStrength(), spEntityID);
        if (encryptedAssertion == null) {
            SAML2Utils.debug.error(classMethod + "failed to encrypt the assertion.");
            throw new SAML2Exception(SAML2Utils.bundle.getString("FailedToEncryptAssertion"));
        }
        List assertionList = new ArrayList();
        assertionList.add(encryptedAssertion);
        res.setEncryptedAssertion(assertionList);
        // reset assertion list
        res.setAssertion(new ArrayList());
        if (SAML2Utils.debug.messageEnabled()) {
            SAML2Utils.debug.message(classMethod + "Assertion encrypted.");
        }
    } else {
        // assertion if applicable
        if (toEncryptNameID) {
            // we need to encrypt the NameID            
            Subject subject = assertion.getSubject();
            if (subject == null) {
                return;
            }
            NameID nameID = subject.getNameID();
            if (nameID == null) {
                return;
            }
            EncryptedID encryptedNameID = nameID.encrypt(encInfo.getWrappingKey(), encInfo.getDataEncAlgorithm(), encInfo.getDataEncStrength(), spEntityID);
            if (encryptedNameID == null) {
                SAML2Utils.debug.error(classMethod + "failed to encrypt the NameID.");
                throw new SAML2Exception(SAML2Utils.bundle.getString("FailedToEncryptNameID"));
            }
            subject.setEncryptedID(encryptedNameID);
            // reset NameID
            subject.setNameID(null);
            assertion.setSubject(subject);
            if (SAML2Utils.debug.messageEnabled()) {
                SAML2Utils.debug.message(classMethod + "NameID encrypted.");
            }
        }
        if (toEncryptAttribute) {
            // we need to encrypt the Attribute
            List attributeStatements = assertion.getAttributeStatements();
            if ((attributeStatements != null) && (attributeStatements.size() > 0)) {
                int asSize = attributeStatements.size();
                // to hold all the AttributeStatements
                List stmts = new ArrayList();
                for (int i = 0; i < asSize; i++) {
                    AttributeStatement attributeStatement = (AttributeStatement) attributeStatements.get(i);
                    List attributes = attributeStatement.getAttribute();
                    if ((attributes == null) || (attributes.size() == 0)) {
                        continue;
                    }
                    int aSize = attributes.size();
                    // holds all the encrypted Attributes in this statement
                    List eaList = new ArrayList();
                    for (int j = 0; j < aSize; j++) {
                        Attribute attribute = (Attribute) attributes.get(j);
                        EncryptedAttribute encryptedAttribute = attribute.encrypt(encInfo.getWrappingKey(), encInfo.getDataEncAlgorithm(), encInfo.getDataEncStrength(), spEntityID);
                        if (encryptedAttribute == null) {
                            SAML2Utils.debug.error(classMethod + "failed to encrypt the Attribute.");
                            throw new SAML2Exception(SAML2Utils.bundle.getString("FailedToEncryptAttribute"));
                        }
                        eaList.add(encryptedAttribute);
                    }
                    attributeStatement.setEncryptedAttribute(eaList);
                    attributeStatement.setAttribute(new ArrayList());
                    stmts.add(attributeStatement);
                }
                assertion.setAttributeStatements(stmts);
                if (SAML2Utils.debug.messageEnabled()) {
                    SAML2Utils.debug.message(classMethod + "Attribute encrypted.");
                }
            }
        }
        if (signAssertion) {
            signAssertion(realm, idpEntityID, assertion);
        }
        List assertionList = new ArrayList();
        assertionList.add(assertion);
        res.setAssertion(assertionList);
    }
}

Example 35 with Assertion

use of com.sun.identity.saml2.assertion.Assertion in project OpenAM by OpenRock.

the class IDPSSOUtil method sendResponseToACS.

/**
     * Sends <code>Response</code> containing an <code>Assertion</code>
     * back to the requesting service provider
     *
     * @param request              the <code>HttpServletRequest</code> object
     * @param response             the <code>HttpServletResponse</code> object
     * @param out                  the print writer for writing out presentation
     * @param session              user session
     * @param authnReq             the <code>AuthnRequest</code> object
     * @param spEntityID           the entity id of the service provider
     * @param idpEntityID          the entity id of the identity provider
     * @param idpMetaAlias         the meta alias of the identity provider
     * @param realm                the realm
     * @param nameIDFormat         the <code>NameIDFormat</code>
     * @param relayState           the relay state
     * @param matchingAuthnContext the <code>AuthnContext</code> used to find
     *                             authentication type and scheme.
     */
public static void sendResponseToACS(HttpServletRequest request, HttpServletResponse response, PrintWriter out, Object session, AuthnRequest authnReq, String spEntityID, String idpEntityID, String idpMetaAlias, String realm, String nameIDFormat, String relayState, AuthnContext matchingAuthnContext) throws SAML2Exception {
    StringBuffer returnedBinding = new StringBuffer();
    String acsURL = IDPSSOUtil.getACSurl(spEntityID, realm, authnReq, request, returnedBinding);
    String acsBinding = returnedBinding.toString();
    if ((acsURL == null) || (acsURL.trim().length() == 0)) {
        SAML2Utils.debug.error("IDPSSOUtil.sendResponseToACS:" + " no ACS URL found.");
        String[] data = { idpMetaAlias };
        LogUtil.error(Level.INFO, LogUtil.NO_ACS_URL, data, session);
        throw new SAML2Exception(SAML2Utils.bundle.getString("UnableTofindACSURL"));
    }
    if ((acsBinding == null) || (acsBinding.trim().length() == 0)) {
        SAML2Utils.debug.error("IDPSSOUtil.sendResponseToACS:" + " no return binding found.");
        String[] data = { idpMetaAlias };
        LogUtil.error(Level.INFO, LogUtil.NO_RETURN_BINDING, data, session);
        throw new SAML2Exception(SAML2Utils.bundle.getString("UnableTofindBinding"));
    }
    String affiliationID = request.getParameter(SAML2Constants.AFFILIATION_ID);
    //check first if there is already an existing sessionindex associated with this SSOToken, if there is, then
    //we need to redirect the request internally to the holder of the idpsession.
    //The remoteServiceURL will be null if there is no sessionindex for this SSOToken, or there is, but it's
    //local. If the remoteServiceURL is not null, we can start to send the request to the original server.
    String remoteServiceURL = SAML2Utils.getRemoteServiceURL(getSessionIndex(session));
    if (remoteServiceURL != null) {
        remoteServiceURL += SAML2Utils.removeDeployUri(request.getRequestURI()) + "?" + request.getQueryString();
        if (SAML2Utils.debug.messageEnabled()) {
            SAML2Utils.debug.message("SessionIndex for this SSOToken is not local, forwarding the request to: " + remoteServiceURL);
        }
        String redirectUrl = null;
        String outputData = null;
        String responseCode = null;
        HashMap<String, String> remoteRequestData = SAML2Utils.sendRequestToOrigServer(request, response, remoteServiceURL);
        if (remoteRequestData != null && !remoteRequestData.isEmpty()) {
            redirectUrl = remoteRequestData.get(SAML2Constants.AM_REDIRECT_URL);
            outputData = remoteRequestData.get(SAML2Constants.OUTPUT_DATA);
            responseCode = remoteRequestData.get(SAML2Constants.RESPONSE_CODE);
        }
        try {
            if (redirectUrl != null && !redirectUrl.isEmpty()) {
                response.sendRedirect(redirectUrl);
            } else {
                if (responseCode != null) {
                    response.setStatus(Integer.valueOf(responseCode));
                }
                // no redirect, perhaps an error page, return the content
                if (outputData != null && !outputData.isEmpty()) {
                    SAML2Utils.debug.message("Printing the forwarded response");
                    response.setContentType("text/html; charset=UTF-8");
                    out.println(outputData);
                    return;
                }
            }
        } catch (IOException ioe) {
            if (SAML2Utils.debug.messageEnabled()) {
                SAML2Utils.debug.message("IDPSSOUtil.sendResponseToACS() error in Request Routing", ioe);
            }
        }
        return;
    }
    //end of request proxy
    // generate a response for the authn request
    Response res = getResponse(request, session, authnReq, spEntityID, idpEntityID, idpMetaAlias, realm, nameIDFormat, acsURL, affiliationID, matchingAuthnContext);
    if (res == null) {
        SAML2Utils.debug.error("IDPSSOUtil.sendResponseToACS:" + " response is null");
        String errorMsg = SAML2Utils.bundle.getString("UnableToCreateAssertion");
        if (authnReq == null) {
            //idp initiated case, will not send error response to sp
            throw new SAML2Exception(errorMsg);
        }
        res = SAML2Utils.getErrorResponse(authnReq, SAML2Constants.RESPONDER, null, errorMsg, idpEntityID);
    } else {
        try {
            String[] values = { idpMetaAlias };
            sessionProvider.setProperty(session, SAML2Constants.IDP_META_ALIAS, values);
        } catch (SessionException e) {
            SAML2Utils.debug.error("IDPSSOUtil.sendResponseToACS:" + " error setting idpMetaAlias into the session: ", e);
        }
    }
    if (res != null) {
        // call multi-federation protocol to set the protocol
        MultiProtocolUtils.addFederationProtocol(session, SingleLogoutManager.SAML2);
        // check if the COT cookie needs to be set
        if (setCOTCookie(request, response, acsBinding, spEntityID, idpEntityID, idpMetaAlias, realm, relayState, acsURL, res, session)) {
            if (SAML2Utils.debug.messageEnabled()) {
                SAML2Utils.debug.message("IDPSSOUtil.sendResponseToACS:" + " Redirected to set COT cookie.");
            }
            return;
        }
        if (SAML2Utils.debug.messageEnabled()) {
            SAML2Utils.debug.message("IDPSSOUtil.sendResponseToACS:" + " Doesn't set COT cookie.");
            SAML2Utils.debug.message("IDPSSOUtil.sendResponseToACS:" + " Response is:  " + res.toXMLString());
        }
        try {
            SAML2Utils.debug.message("IDPSSOUtil.sendResponseToACS: Invoking the IDP Adapter");
            SAML2IdentityProviderAdapter idpAdapter = IDPSSOUtil.getIDPAdapterClass(realm, idpEntityID);
            if (idpAdapter != null) {
                idpAdapter.preSignResponse(authnReq, res, idpEntityID, realm, request, session, relayState);
            }
        } catch (SAML2Exception se) {
            SAML2Utils.debug.error("IDPSSOUtil.sendResponseToACS: There was a problem when invoking the " + "preSendResponse of the IDP Adapter: ", se);
        }
        sendResponse(request, response, out, acsBinding, spEntityID, idpEntityID, idpMetaAlias, realm, relayState, acsURL, res, session);
    } else {
        SAML2Utils.debug.error("IDPSSOUtil.sendResponseToACS:" + " error response is null");
        throw new SAML2Exception(SAML2Utils.bundle.getString("UnableToCreateErrorResponse"));
    }
}