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package org.keycloak.adapters.tomcat;
import org.apache.catalina.Context;
import org.apache.catalina.Lifecycle;
import org.apache.catalina.LifecycleEvent;
import org.apache.catalina.LifecycleListener;
import org.apache.catalina.Manager;
import org.apache.catalina.authenticator.Constants;
import org.apache.catalina.authenticator.FormAuthenticator;
import org.apache.catalina.authenticator.SavedRequest;
import org.apache.catalina.connector.Request;
import org.apache.catalina.connector.Response;
import org.apache.catalina.deploy.LoginConfig;
import org.apache.tomcat.util.buf.ByteChunk;
import org.keycloak.KeycloakSecurityContext;
import org.keycloak.constants.AdapterConstants;
import org.keycloak.adapters.AdapterDeploymentContext;
import org.keycloak.adapters.AdapterTokenStore;
import org.keycloak.adapters.AuthChallenge;
import org.keycloak.adapters.AuthOutcome;
import org.keycloak.adapters.HttpFacade;
import org.keycloak.adapters.KeycloakDeployment;
import org.keycloak.adapters.KeycloakDeploymentBuilder;
import org.keycloak.adapters.NodesRegistrationManagement;
import org.keycloak.adapters.PreAuthActionsHandler;
import org.keycloak.adapters.RefreshableKeycloakSecurityContext;
import org.keycloak.enums.TokenStore;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Locale;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.keycloak.adapters.KeycloakConfigResolver;
/**
* Keycloak authentication valve
*
* @author <a href="mailto:ungarida@gmail.com">Davide Ungari</a>
* @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
* @version $Revision: 1 $
*/
public abstract class AbstractKeycloakAuthenticatorValve extends FormAuthenticator implements LifecycleListener {
public static final String TOKEN_STORE_NOTE = "TOKEN_STORE_NOTE";
private final static Logger log = Logger.getLogger(""+AbstractKeycloakAuthenticatorValve.class);
protected CatalinaUserSessionManagement userSessionManagement = new CatalinaUserSessionManagement();
protected AdapterDeploymentContext deploymentContext;
protected NodesRegistrationManagement nodesRegistrationManagement;
@Override
public void lifecycleEvent(LifecycleEvent event) {
if (Lifecycle.START_EVENT.equals(event.getType())) {
cache = false;
} else if (Lifecycle.AFTER_START_EVENT.equals(event.getType())) {
keycloakInit();
} else if (event.getType() == Lifecycle.BEFORE_STOP_EVENT) {
beforeStop();
}
}
protected void logoutInternal(Request request) {
KeycloakSecurityContext ksc = (KeycloakSecurityContext)request.getAttribute(KeycloakSecurityContext.class.getName());
if (ksc != null) {
CatalinaHttpFacade facade = new CatalinaHttpFacade(request, null);
KeycloakDeployment deployment = deploymentContext.resolveDeployment(facade);
if (ksc instanceof RefreshableKeycloakSecurityContext) {
((RefreshableKeycloakSecurityContext) ksc).logout(deployment);
}
AdapterTokenStore tokenStore = getTokenStore(request, facade, deployment);
tokenStore.logout();
request.removeAttribute(KeycloakSecurityContext.class.getName());
}
request.setUserPrincipal(null);
}
@SuppressWarnings("UseSpecificCatch")
public void keycloakInit() {
// Possible scenarios:
// 1) The deployment has a keycloak.config.resolver specified and it exists:
// Outcome: adapter uses the resolver
// 2) The deployment has a keycloak.config.resolver and isn't valid (doesn't exists, isn't a resolver, ...) :
// Outcome: adapter is left unconfigured
// 3) The deployment doesn't have a keycloak.config.resolver , but has a keycloak.json (or equivalent)
// Outcome: adapter uses it
// 4) The deployment doesn't have a keycloak.config.resolver nor keycloak.json (or equivalent)
// Outcome: adapter is left unconfigured
String configResolverClass = context.getServletContext().getInitParameter("keycloak.config.resolver");
if (configResolverClass != null) {
try {
KeycloakConfigResolver configResolver = (KeycloakConfigResolver) context.getLoader().getClassLoader().loadClass(configResolverClass).newInstance();
deploymentContext = new AdapterDeploymentContext(configResolver);
log.log(Level.INFO, "Using {0} to resolve Keycloak configuration on a per-request basis.", configResolverClass);
} catch (Exception ex) {
log.log(Level.FINE, "The specified resolver {0} could NOT be loaded. Keycloak is unconfigured and will deny all requests. Reason: {1}", new Object[]{configResolverClass, ex.getMessage()});
deploymentContext = new AdapterDeploymentContext(new KeycloakDeployment());
}
} else {
InputStream configInputStream = getConfigInputStream(context);
KeycloakDeployment kd;
if (configInputStream == null) {
log.fine("No adapter configuration. Keycloak is unconfigured and will deny all requests.");
kd = new KeycloakDeployment();
} else {
kd = KeycloakDeploymentBuilder.build(configInputStream);
}
deploymentContext = new AdapterDeploymentContext(kd);
log.fine("Keycloak is using a per-deployment configuration.");
}
context.getServletContext().setAttribute(AdapterDeploymentContext.class.getName(), deploymentContext);
AuthenticatedActionsValve actions = new AuthenticatedActionsValve(deploymentContext, getNext(), getContainer());
setNext(actions);
nodesRegistrationManagement = new NodesRegistrationManagement();
}
protected void beforeStop() {
if (nodesRegistrationManagement != null) {
nodesRegistrationManagement.stop();
}
}
private static InputStream getJSONFromServletContext(ServletContext servletContext) {
String json = servletContext.getInitParameter(AdapterConstants.AUTH_DATA_PARAM_NAME);
if (json == null) {
return null;
}
log.finest("**** using " + AdapterConstants.AUTH_DATA_PARAM_NAME);
log.finest(json);
return new ByteArrayInputStream(json.getBytes());
}
private static InputStream getConfigInputStream(Context context) {
InputStream is = getJSONFromServletContext(context.getServletContext());
if (is == null) {
String path = context.getServletContext().getInitParameter("keycloak.config.file");
if (path == null) {
log.finest("**** using /WEB-INF/keycloak.json");
is = context.getServletContext().getResourceAsStream("/WEB-INF/keycloak.json");
} else {
try {
is = new FileInputStream(path);
} catch (FileNotFoundException e) {
log.log(Level.SEVERE, "NOT FOUND {0}", path);
throw new RuntimeException(e);
}
}
}
return is;
}
@Override
public void invoke(Request request, Response response) throws IOException, ServletException {
try {
CatalinaHttpFacade facade = new CatalinaHttpFacade(request, response);
Manager sessionManager = request.getContext().getManager();
CatalinaUserSessionManagementWrapper sessionManagementWrapper = new CatalinaUserSessionManagementWrapper(userSessionManagement, sessionManager);
PreAuthActionsHandler handler = new PreAuthActionsHandler(sessionManagementWrapper, deploymentContext, facade);
if (handler.handleRequest()) {
return;
}
checkKeycloakSession(request, facade);
super.invoke(request, response);
} finally {
}
}
protected abstract GenericPrincipalFactory createPrincipalFactory();
protected abstract boolean forwardToErrorPageInternal(Request request, HttpServletResponse response, Object loginConfig) throws IOException;
protected boolean authenticateInternal(Request request, HttpServletResponse response, Object loginConfig) throws IOException {
CatalinaHttpFacade facade = new CatalinaHttpFacade(request, response);
KeycloakDeployment deployment = deploymentContext.resolveDeployment(facade);
if (deployment == null || !deployment.isConfigured()) {
return false;
}
AdapterTokenStore tokenStore = getTokenStore(request, facade, deployment);
nodesRegistrationManagement.tryRegister(deployment);
CatalinaRequestAuthenticator authenticator = new CatalinaRequestAuthenticator(deployment, tokenStore, facade, request, createPrincipalFactory());
AuthOutcome outcome = authenticator.authenticate();
if (outcome == AuthOutcome.AUTHENTICATED) {
if (facade.isEnded()) {
return false;
}
return true;
}
AuthChallenge challenge = authenticator.getChallenge();
if (challenge != null) {
if (loginConfig == null) {
loginConfig = request.getContext().getLoginConfig();
}
if (challenge.errorPage()) {
if (forwardToErrorPageInternal(request, response, loginConfig))return false;
}
challenge.challenge(facade);
}
return false;
}
/**
* Checks that access token is still valid. Will attempt refresh of token if it is not.
*
* @param request
*/
protected void checkKeycloakSession(Request request, HttpFacade facade) {
KeycloakDeployment deployment = deploymentContext.resolveDeployment(facade);
AdapterTokenStore tokenStore = getTokenStore(request, facade, deployment);
tokenStore.checkCurrentToken();
}
public void keycloakSaveRequest(Request request) throws IOException {
saveRequest(request, request.getSessionInternal(true));
}
public boolean keycloakRestoreRequest(Request request) {
try {
return restoreRequest(request, request.getSessionInternal());
} catch (IOException e) {
throw new RuntimeException(e);
}
}
protected AdapterTokenStore getTokenStore(Request request, HttpFacade facade, KeycloakDeployment resolvedDeployment) {
AdapterTokenStore store = (AdapterTokenStore)request.getNote(TOKEN_STORE_NOTE);
if (store != null) {
return store;
}
if (resolvedDeployment.getTokenStore() == TokenStore.SESSION) {
store = new CatalinaSessionTokenStore(request, resolvedDeployment, userSessionManagement, createPrincipalFactory(), this);
} else {
store = new CatalinaCookieTokenStore(request, facade, resolvedDeployment, createPrincipalFactory());
}
request.setNote(TOKEN_STORE_NOTE, store);
return store;
}
}