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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2019 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.onap.aai.aaf.filters;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.onap.aai.aaf.auth.AAIAuthCore;
import org.onap.aai.aaf.auth.CertUtil;
import org.onap.aai.aaf.auth.ResponseFormatter;
import org.onap.aai.exceptions.AAIException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.web.filter.OrderedRequestContextFilter;
import org.springframework.context.annotation.Profile;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Component;
import javax.security.auth.x500.X500Principal;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.security.cert.X509Certificate;
import java.util.*;
@Component
@Profile("two-way-ssl")
public class TwoWaySslAuthorization extends OrderedRequestContextFilter {
private static final Logger LOGGER = LoggerFactory.getLogger(TwoWaySslAuthorization.class);
public static final String HTTP_METHOD_OVERRIDE = "X-HTTP-Method-Override";
public static final String MERGE_PATCH = "MERGE_PATCH";
@Autowired
private Environment environment;
@Autowired
private AAIAuthCore aaiAuthCore;
@Autowired
private CadiProps cadiProps;
public TwoWaySslAuthorization(){
this.setOrder(FilterPriority.TWO_WAY_SSL_AUTH.getPriority());
}
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws IOException, ServletException {
String uri = request.getRequestURI();
String httpMethod = getHttpMethod(request);
Optional<String> authUser = getUser(request);
if (authUser.isPresent()) {
Properties cadiProperties = cadiProps.getCadiProperties();
String issuer = CertUtil.getCertIssuer(request);
if (issuer == null || issuer.isEmpty()) {
AAIException aaie = new AAIException("AAI_9107");
ResponseFormatter.errorResponse(aaie, request, response);
return;
}
issuer = issuer.replaceAll("\\s+","").toUpperCase();
List<String> cadiConfiguredIssuers = CertUtil.getCadiCertIssuers(cadiProperties);
boolean isAafAuthProfileActive = this.isAafAuthProfileActive();
if ((!isAafAuthProfileActive) || (!cadiConfiguredIssuers.contains(issuer)) ) {
try {
this.authorize(uri, httpMethod, authUser.get(), this.getHaProxyUser(request), issuer);
} catch (AAIException e) {
ResponseFormatter.errorResponse(e, request, response);
return;
}
}
} else {
AAIException aaie = new AAIException("AAI_9107");
ResponseFormatter.errorResponse(aaie, request, response);
return;
}
filterChain.doFilter(request, response);
}
private String getHttpMethod(HttpServletRequest request) {
String httpMethod = request.getMethod();
if ("POST".equalsIgnoreCase(httpMethod)
&& "PATCH".equals(request.getHeader(HTTP_METHOD_OVERRIDE))) {
httpMethod = MERGE_PATCH;
}
if (httpMethod.equalsIgnoreCase(MERGE_PATCH) || "patch".equalsIgnoreCase(httpMethod)) {
httpMethod = "PUT";
}
return httpMethod;
}
private Optional<String> getUser(HttpServletRequest hsr) {
String authUser = null;
if (hsr.getAttribute("javax.servlet.request.cipher_suite") != null) {
X509Certificate[] certChain = (X509Certificate[]) hsr.getAttribute("javax.servlet.request.X509Certificate");
/*
* If the certificate is null or the certificate chain length is zero Then
* retrieve the authorization in the request header Authorization Check that it
* is not null and that it starts with Basic and then strip the basic portion to
* get the base64 credentials Check if this is contained in the AAIBasicAuth
* Singleton class If it is, retrieve the username associated with that
* credentials and set to authUser Otherwise, get the principal from certificate
* and use that authUser
*/
if (certChain == null || certChain.length == 0) {
String authorization = hsr.getHeader("Authorization");
if (authorization != null && authorization.startsWith("Basic ")) {
authUser = authorization.replace("Basic ", "");
}
} else {
X509Certificate clientCert = certChain[0];
X500Principal subjectDN = clientCert.getSubjectX500Principal();
authUser = subjectDN.toString().toLowerCase();
}
}
return Optional.ofNullable(authUser);
}
private String getHaProxyUser(HttpServletRequest hsr) {
String haProxyUser;
if (Objects.isNull(hsr.getHeader("X-AAI-SSL-Client-CN"))
|| Objects.isNull(hsr.getHeader("X-AAI-SSL-Client-OU"))
|| Objects.isNull(hsr.getHeader("X-AAI-SSL-Client-O"))
|| Objects.isNull(hsr.getHeader("X-AAI-SSL-Client-L"))
|| Objects.isNull(hsr.getHeader("X-AAI-SSL-Client-ST"))
|| Objects.isNull(hsr.getHeader("X-AAI-SSL-Client-C"))) {
haProxyUser = "";
} else {
haProxyUser = String.format("CN=%s, OU=%s, O=\"%s\", L=%s, ST=%s, C=%s",
Objects.toString(hsr.getHeader("X-AAI-SSL-Client-CN"), ""),
Objects.toString(hsr.getHeader("X-AAI-SSL-Client-OU"), ""),
Objects.toString(hsr.getHeader("X-AAI-SSL-Client-O"), ""),
Objects.toString(hsr.getHeader("X-AAI-SSL-Client-L"), ""),
Objects.toString(hsr.getHeader("X-AAI-SSL-Client-ST"), ""),
Objects.toString(hsr.getHeader("X-AAI-SSL-Client-C"), "")).toLowerCase();
}
return haProxyUser;
}
private void authorize(String uri, String httpMethod, String authUser, String haProxyUser, String issuer) throws AAIException {
if (!aaiAuthCore.authorize(authUser, uri, httpMethod, haProxyUser, issuer)) {
throw new AAIException("AAI_9101", "Request on " + httpMethod + " " + uri + " status is not OK");
}
}
private boolean isAafAuthProfileActive() {
String[] profiles = environment.getActiveProfiles();
if (profiles != null) {
if (Arrays.stream(profiles).anyMatch(
env -> (env.equalsIgnoreCase(AafProfiles.AAF_CERT_AUTHENTICATION)))) {
return true;
}
}
return false;
}
}
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