/*
* Copyright (C) 2014 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.errai.security.server;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Map;
import javax.enterprise.context.Dependent;
import javax.servlet.FilterConfig;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jboss.errai.marshalling.server.MappingContextSingleton;
import org.picketlink.authentication.web.HTTPAuthenticationScheme;
import org.picketlink.credential.DefaultLoginCredentials;
@Dependent
public class FormAuthenticationScheme implements HTTPAuthenticationScheme {
public static final String HOST_PAGE_INIT_PARAM = "host-page";
public static final String LOGIN_PAGE_INIT_PARAM = "form-login-page";
public static final String LOGIN_ERROR_QUERY_PARAM = "login_failed";
public static final String HTTP_FORM_SECURITY_CHECK_URI = "/uf_security_check";
public static final String HTTP_FORM_USERNAME_PARAM = "uf_username";
public static final String HTTP_FORM_PASSWORD_PARAM = "uf_password";
/**
* URI of the GWT host page, relative to the servlet container root (so it starts with '/' and includes the context
* path).
*/
private String hostPageUri;
/**
* URI of the login page, relative to the servlet container root (so it starts with '/' and includes the context
* path).
*/
private String loginPageUri;
@Override
public void initialize(FilterConfig filterConfig) {
String contextRelativeHostPageUri = filterConfig.getInitParameter(HOST_PAGE_INIT_PARAM);
if (contextRelativeHostPageUri == null) {
throw new IllegalStateException(
"FormAuthenticationScheme requires that you set the filter init parameter \""
+ HOST_PAGE_INIT_PARAM + "\" to the context-relative URI of the host page.");
}
hostPageUri = filterConfig.getServletContext().getContextPath() + contextRelativeHostPageUri;
String contextRelativeLoginPageUri = filterConfig.getInitParameter(LOGIN_PAGE_INIT_PARAM);
if (contextRelativeLoginPageUri == null) {
throw new IllegalStateException(
"FormAuthenticationScheme requires that you set the filter init parameter \""
+ LOGIN_PAGE_INIT_PARAM + "\" to the context-relative URI of the login page.");
}
loginPageUri = filterConfig.getServletContext().getContextPath() + contextRelativeLoginPageUri;
// this ensures Errai Marshalling has been set up (for encoding the cookie)
MappingContextSingleton.get();
}
@Override
public void extractCredential(HttpServletRequest request, DefaultLoginCredentials creds) {
if (isLoginAttempt(request)) {
creds.setUserId(request.getParameter(HTTP_FORM_USERNAME_PARAM));
creds.setPassword(request.getParameter(HTTP_FORM_PASSWORD_PARAM));
}
}
@Override
public void challengeClient(HttpServletRequest request, HttpServletResponse response) throws IOException {
if (request.getRequestURI().equals(hostPageUri)) {
StringBuilder loginUri = new StringBuilder();
loginUri.append(loginPageUri);
String extraParams = extractParameters(request);
if (extraParams.length() > 0) {
loginUri.append("?").append(extraParams);
}
response.sendRedirect(loginUri.toString());
}
else if (isLoginAttempt(request)) {
StringBuilder loginUri = new StringBuilder();
loginUri.append(loginPageUri);
loginUri.append("?");
loginUri.append(LOGIN_ERROR_QUERY_PARAM).append("=true");
String extraParams = extractParameters(request);
if (extraParams.length() > 0) {
loginUri.append("&").append(extraParams);
}
response.sendRedirect(loginUri.toString());
}
else {
response.sendError(HttpServletResponse.SC_FORBIDDEN);
}
}
private boolean isLoginAttempt(HttpServletRequest request) {
return request.getMethod().equals("POST") && request.getRequestURI().contains(HTTP_FORM_SECURITY_CHECK_URI);
}
@Override
public boolean postAuthentication(HttpServletRequest request, HttpServletResponse response) throws IOException {
StringBuilder redirectTarget = new StringBuilder(hostPageUri);
String extraParams = extractParameters(request);
if (extraParams.length() > 0) {
redirectTarget.append("?").append(extraParams);
}
response.sendRedirect(redirectTarget.toString());
return false;
}
/**
* Extracts all parameters except the username and password into a URL-encoded query string. The string does not begin
* or end with a "&".
*/
private static String extractParameters(HttpServletRequest fromRequest) {
try {
StringBuilder sb = new StringBuilder();
for (Map.Entry<String, String[]> param : fromRequest.getParameterMap().entrySet()) {
String paramName = URLEncoder.encode(param.getKey(), "UTF-8");
if (paramName.equals(HTTP_FORM_USERNAME_PARAM) || paramName.equals(HTTP_FORM_PASSWORD_PARAM)) {
continue;
}
for (String value : param.getValue()) {
if (sb.length() != 0) {
sb.append("&");
}
sb.append(paramName).append("=").append(URLEncoder.encode(value, "UTF-8"));
}
}
return sb.toString();
} catch (UnsupportedEncodingException e) {
throw new AssertionError("UTF-8 not supported on this JVM?");
}
}
@Override
public boolean isProtected(HttpServletRequest request) {
return true;
}
}