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/*-
* ============LICENSE_START==========================================
* ONAP Portal
* ===================================================================
* Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* ===================================================================
*
* Unless otherwise specified, all software contained herein is licensed
* under the Apache License, Version 2.0 (the "License");
* you may not use this software 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.
*
* Unless otherwise specified, all documentation contained herein is licensed
* under the Creative Commons License, Attribution 4.0 Intl. (the "License");
* you may not use this documentation except in compliance with the License.
* You may obtain a copy of the License at
*
* https://creativecommons.org/licenses/by/4.0/
*
* Unless required by applicable law or agreed to in writing, documentation
* 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.
*
* ============LICENSE_END============================================
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
*/
package org.onap.portalapp.filter;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang.StringUtils;
import org.onap.portalapp.util.SecurityXssValidator;
import org.springframework.web.filter.OncePerRequestFilter;
import org.springframework.web.util.ContentCachingRequestWrapper;
import org.springframework.web.util.ContentCachingResponseWrapper;
import org.springframework.web.util.WebUtils;
public class SecurityXssFilter extends OncePerRequestFilter {
private static final String BAD_REQUEST = "BAD_REQUEST";
private SecurityXssValidator validator = SecurityXssValidator.getInstance();
private static String getRequestData(final HttpServletRequest request) throws UnsupportedEncodingException {
String payload = null;
ContentCachingRequestWrapper wrapper = WebUtils.getNativeRequest(request, ContentCachingRequestWrapper.class);
if (wrapper != null) {
byte[] buf = wrapper.getContentAsByteArray();
if (buf.length > 0) {
payload = new String(buf, 0, buf.length, wrapper.getCharacterEncoding());
}
}
return payload;
}
private static String getResponseData(final HttpServletResponse response) throws IOException {
String payload = null;
ContentCachingResponseWrapper wrapper = WebUtils.getNativeResponse(response,
ContentCachingResponseWrapper.class);
if (wrapper != null) {
byte[] buf = wrapper.getContentAsByteArray();
if (buf.length > 0) {
payload = new String(buf, 0, buf.length, wrapper.getCharacterEncoding());
wrapper.copyBodyToResponse();
}
}
return payload;
}
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
throws ServletException, IOException {
if (request.getMethod().equalsIgnoreCase("POST") || request.getMethod().equalsIgnoreCase("PUT")) {
HttpServletRequest requestToCache = new ContentCachingRequestWrapper(request);
HttpServletResponse responseToCache = new ContentCachingResponseWrapper(response);
filterChain.doFilter(requestToCache, responseToCache);
String requestData = getRequestData(requestToCache);
String responseData = getResponseData(responseToCache);
if (StringUtils.isNotBlank(requestData) && validator.denyXSS(requestData)) {
throw new SecurityException(BAD_REQUEST);
}
} else {
filterChain.doFilter(request, response);
}
}
}
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