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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2009 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cms.servlet.filter;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.netscape.certsrv.apps.CMS;
public class EERequestFilter implements Filter
{
private static final String HTTP_SCHEME = "http";
private static final String HTTP_PORT = "http_port";
private static final String HTTP_ROLE = "EE";
private static final String HTTPS_SCHEME = "https";
private static final String HTTPS_PORT = "https_port";
private static final String HTTPS_ROLE = "EE";
private static final String PROXY_PORT = "proxy_port";
private static final String PROXY_HTTP_PORT = "proxy_http_port";
private FilterConfig config;
/* Create a new EERequestFilter */
public EERequestFilter() {}
public void init( FilterConfig filterConfig )
throws ServletException
{
this.config = filterConfig;
}
public void doFilter( ServletRequest request,
ServletResponse response,
FilterChain chain )
throws java.io.IOException,
ServletException
{
String filterName = getClass().getName();
String scheme = null;
int port = 0;
String request_port = null;
String param_http_port = null;
String param_https_port = null;
String param_proxy_port = null;
String param_proxy_http_port = null;
String msg = null;
String param_active = null;
// CMS.debug("Entering the EE filter");
param_active = config.getInitParameter( "active");
if( request instanceof HttpServletRequest ) {
HttpServletResponse resp = ( HttpServletResponse ) response;
// RFC 1738: verify that scheme is either "http" or "https"
scheme = request.getScheme();
if( ( ! scheme.equals( HTTP_SCHEME ) ) &&
( ! scheme.equals( HTTPS_SCHEME ) ) ) {
msg = "The scheme MUST be either '" + HTTP_SCHEME
+ "' or '" + HTTPS_SCHEME
+ "', NOT '" + scheme + "'!";
CMS.debug( filterName + ": " + msg );
resp.sendError( HttpServletResponse.SC_UNAUTHORIZED, msg );
return;
}
// Always obtain either an "http" or an "https" port from request
port = request.getLocalPort();
request_port = Integer.toString( port );
// Always obtain the "http" port passed in as a parameter
param_http_port = config.getInitParameter( HTTP_PORT );
if( param_http_port == null ) {
msg = "The <param-name> '" + HTTP_PORT
+ "' </param-name> " + "MUST be specified in 'web.xml'!";
CMS.debug( filterName + ": " + msg );
resp.sendError( HttpServletResponse.SC_NOT_IMPLEMENTED, msg );
return;
}
// Always obtain the "https" port passed in as a parameter
param_https_port = config.getInitParameter( HTTPS_PORT );
if( param_https_port == null ) {
msg = "The <param-name> '" + HTTPS_PORT
+ "' </param-name> " + "MUST be specified in 'web.xml'!";
CMS.debug( filterName + ": " + msg );
resp.sendError( HttpServletResponse.SC_NOT_IMPLEMENTED, msg );
return;
}
param_proxy_http_port = config.getInitParameter(PROXY_HTTP_PORT);
param_proxy_port = config.getInitParameter(PROXY_PORT);
boolean bad_port = false;
// If the scheme is "http", compare
// the request and param "http" ports;
// otherwise, if the scheme is "https", compare
// the request and param "https" ports
if( scheme.equals( HTTP_SCHEME ) ) {
if( ! param_http_port.equals( request_port ) ) {
String uri = ((HttpServletRequest) request).getRequestURI();
if (param_proxy_http_port != null) {
if (!param_proxy_http_port.equals(request_port)) {
msg = "Use HTTP port '" + param_http_port
+ "' or proxy port '" + param_proxy_http_port
+ "' instead of '" + request_port
+ "' when performing " + HTTP_ROLE + " tasks!";
bad_port = true;
}
} else {
msg = "Use HTTP port '" + param_http_port
+ "' instead of '" + request_port
+ "' when performing " + HTTP_ROLE + " tasks!";
bad_port = true;
}
if (bad_port) {
CMS.debug( filterName + ": " + msg );
CMS.debug( filterName + ": uri is " + uri);
if ((param_active != null) &&(param_active.equals("false"))) {
CMS.debug("Filter is disabled .. continuing");
} else {
resp.sendError( HttpServletResponse.SC_NOT_FOUND, msg );
return;
}
}
}
} else if( scheme.equals( HTTPS_SCHEME ) ) {
if( ! param_https_port.equals( request_port ) ) {
String uri = ((HttpServletRequest) request).getRequestURI();
if (param_proxy_port != null) {
if (!param_proxy_port.equals(request_port)) {
msg = "Use HTTPS port '" + param_https_port
+ "' or proxy port '" + param_proxy_port
+ "' instead of '" + request_port
+ "' when performing " + HTTPS_ROLE + " tasks!";
bad_port = true;
}
} else {
msg = "Use HTTPS port '" + param_https_port
+ "' instead of '" + request_port
+ "' when performing " + HTTPS_ROLE + " tasks!";
bad_port = true;
}
if (bad_port) {
CMS.debug( filterName + ": " + msg );
CMS.debug( filterName + ": uri is " + uri);
if ((param_active != null) &&(param_active.equals("false"))) {
CMS.debug("Filter is disabled .. continuing");
} else {
resp.sendError( HttpServletResponse.SC_NOT_FOUND, msg );
return;
}
}
}
}
}
// CMS.debug("Exiting the EE filter");
chain.doFilter( request, response );
}
public void destroy()
{
}
}
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