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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2021 AT&T 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.openecomp.server.filters;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Objects;
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 org.onap.sdc.tosca.services.YamlUtil;
import org.openecomp.sdc.be.config.Configuration.BasicAuthConfig;
import org.openecomp.sdc.logging.api.Logger;
import org.openecomp.sdc.logging.api.LoggerFactory;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Base64;
import org.openecomp.sdcrests.item.rest.services.catalog.notification.EntryNotConfiguredException;
public class BasicAuthenticationFilter implements Filter {
private static final Logger log = LoggerFactory.getLogger(BasicAuthenticationFilter.class);
private static final String CONFIG_FILE_PROPERTY = "configuration.yaml";
private static final String CONFIG_SECTION = "basicAuth";
@Override
public void destroy() {
// TODO Auto-generated method stub
}
@Override
public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
throws IOException, ServletException {
String file = Objects.requireNonNull(System.getProperty(CONFIG_FILE_PROPERTY),
"Config file location must be specified via system property " + CONFIG_FILE_PROPERTY);
Object config = getAuthenticationConfiguration(file);
ObjectMapper mapper = new ObjectMapper();
BasicAuthConfig basicAuthConfig = mapper.convertValue(config, BasicAuthConfig.class);
HttpServletRequest httpRequest = (HttpServletRequest) arg0;
HttpServletRequestWrapper servletRequest = new HttpServletRequestWrapper(httpRequest);
// BasicAuth is disabled
if (!basicAuthConfig.isEnabled()) {
arg2.doFilter(servletRequest, arg1);
return;
}
List<String> excludedUrls = Arrays.asList(basicAuthConfig.getExcludedUrls().split(","));
if (excludedUrls.contains(httpRequest.getServletPath() + httpRequest.getPathInfo())) {
// this url is included in the excludeUrls list, no need for authentication
arg2.doFilter(servletRequest, arg1);
return;
}
// Get the basicAuth info from the header
String authorizationHeader = httpRequest.getHeader("Authorization");
if (authorizationHeader == null || authorizationHeader.isEmpty()) {
((HttpServletResponse) arg1).setStatus(HttpServletResponse.SC_UNAUTHORIZED);
return;
}
String base64Credentials =
httpRequest.getHeader("Authorization").replace("Basic", "").trim();
if (verifyCredentials(basicAuthConfig, base64Credentials)) {
arg2.doFilter(servletRequest, arg1);
} else {
((HttpServletResponse) arg1).setStatus(HttpServletResponse.SC_UNAUTHORIZED);
}
}
@Override
public void init(FilterConfig config) throws ServletException {
}
private static Object getAuthenticationConfiguration(String file) throws IOException {
InputStream fileInput = new FileInputStream(file);
YamlUtil yamlUtil = new YamlUtil();
Map<?, ?> configuration = Objects.requireNonNull(yamlUtil.yamlToMap(fileInput), "Configuration cannot be empty");
Object authenticationConfig = configuration.get(CONFIG_SECTION);
if (authenticationConfig == null) {
throw new EntryNotConfiguredException(CONFIG_SECTION + " section");
}
return authenticationConfig;
}
private boolean verifyCredentials (BasicAuthConfig basicAuthConfig, String credential) {
String decodedCredentials = new String(Base64.getDecoder().decode(credential));
int p = decodedCredentials.indexOf(':');
if (p != -1) {
String userName = decodedCredentials.substring(0, p).trim();
String password = decodedCredentials.substring(p + 1).trim();
if (!userName.equals(basicAuthConfig.getUserName()) || !password.equals(basicAuthConfig.getUserPass())) {
log.error("Authentication failed. Invalid user name or password");
return false;
}
return true;
} else {
log.error("Failed to decode credentials");
return false;
}
}
}
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