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/*-
* ============LICENSE_START=======================================================
* org.onap.dmaap
* ================================================================================
* Copyright (C) 2019 Nokia Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.dmaap.dbcapi.resources;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
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.HttpServletResponse;
import org.apache.log4j.Logger;
import org.eclipse.jetty.http.HttpStatus;
import org.onap.aaf.cadi.PropAccess;
import org.onap.aaf.cadi.filter.CadiFilter;
import org.onap.dmaap.dbcapi.model.ApiError;
import org.onap.dmaap.dbcapi.util.DmaapConfig;
public class AAFAuthenticationFilter implements Filter {
private static final Logger LOGGER = Logger.getLogger(AAFAuthenticationFilter.class.getName());
static final String CADI_PROPERTIES = "cadi.properties";
static final String AAF_AUTHN_FLAG = "UseAAF";
private boolean isAafEnabled;
private CadiFilter cadiFilter;
@Override
public void init(FilterConfig filterConfig) throws ServletException {
DmaapConfig dmaapConfig = getConfig();
String flag = dmaapConfig.getProperty(AAF_AUTHN_FLAG, "false");
isAafEnabled = "true".equalsIgnoreCase(flag);
initCadi(dmaapConfig);
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
throws IOException, ServletException {
if(isAafEnabled) {
cadiFilter.doFilter(servletRequest, servletResponse, filterChain);
updateResponseBody((HttpServletResponse)servletResponse);
} else {
filterChain.doFilter(servletRequest, servletResponse);
}
}
private void updateResponseBody(HttpServletResponse httpResponse)
throws IOException {
if(httpResponse.getStatus() == 401) {
String errorMsg = "invalid or no credentials provided";
LOGGER.error(errorMsg);
httpResponse.setContentType("application/json");
httpResponse.setCharacterEncoding("UTF-8");
httpResponse.getWriter().print(buildErrorResponse(errorMsg));
httpResponse.getWriter().flush();
}
}
private String buildErrorResponse(String msg) {
try {
return new ObjectMapper().writeValueAsString(new ApiError(HttpStatus.UNAUTHORIZED_401, msg, "Authentication"));
} catch (JsonProcessingException e) {
LOGGER.warn("Could not serialize response entity: " + e.getMessage());
return "";
}
}
@Override
public void destroy() {
//nothing to cleanup
}
private void initCadi(DmaapConfig dmaapConfig) throws ServletException {
if(isAafEnabled) {
try {
String cadiPropertiesFile = dmaapConfig.getProperty(CADI_PROPERTIES);
if(cadiPropertiesFile != null && !cadiPropertiesFile.isEmpty()) {
cadiFilter = new CadiFilter(new PropAccess(cadiPropertiesFile));
} else {
throw new ServletException("Cannot initialize CADI filter.CADI properties not available.");
}
} catch (ServletException e) {
LOGGER.error("CADI init error :" + e.getMessage());
throw e;
}
}
}
DmaapConfig getConfig() {
return (DmaapConfig) DmaapConfig.getConfig();
}
//tests only
CadiFilter getCadiFilter() {
return cadiFilter;
}
void setCadiFilter(CadiFilter cadiFilter) {
this.cadiFilter = cadiFilter;
}
boolean isAafEnabled() {
return isAafEnabled;
}
}
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