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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 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.interceptors.pre;
import java.io.IOException;
import java.security.cert.X509Certificate;
import java.util.*;
import java.util.stream.Collectors;
import javax.annotation.Priority;
import javax.security.auth.x500.X500Principal;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerRequestFilter;
import javax.ws.rs.container.PreMatching;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import org.onap.aai.auth.AAIAuthCore;
import org.onap.aai.exceptions.AAIException;
import org.onap.aai.interceptors.AAIContainerFilter;
import org.onap.aai.interceptors.AAIHeaderProperties;
import org.onap.aai.logging.ErrorLogHelper;
import org.onap.aai.restcore.HttpMethod;
import org.onap.aai.util.AAIConfig;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Profile;
@PreMatching
@Priority(AAIRequestFilterPriority.AUTHORIZATION)
@Profile("two-way-ssl")
public class TwoWaySslAuthorization extends AAIContainerFilter implements ContainerRequestFilter {
@Autowired
private HttpServletRequest httpServletRequest;
@Autowired
private AAIAuthCore aaiAuthCore;
@Override
public void filter(ContainerRequestContext requestContext) {
Optional<Response> oResp;
String uri = requestContext.getUriInfo().getAbsolutePath().getPath();
String httpMethod = getHttpMethod(requestContext);
List<MediaType> acceptHeaderValues = requestContext.getAcceptableMediaTypes();
Optional<String> authUser = getUser(this.httpServletRequest);
if (authUser.isPresent()) {
oResp = this.authorize(uri, httpMethod, acceptHeaderValues, authUser.get(),
this.getHaProxyUser(this.httpServletRequest), getCertIssuer(this.httpServletRequest));
if (oResp.isPresent()) {
requestContext.abortWith(oResp.get());
return;
}
} else {
AAIException aaie = new AAIException("AAI_9107");
requestContext
.abortWith(Response
.status(aaie.getErrorObject().getHTTPResponseCode()).entity(ErrorLogHelper
.getRESTAPIErrorResponseWithLogging(acceptHeaderValues, aaie, new ArrayList<>()))
.build());
}
}
private String getCertIssuer(HttpServletRequest hsr) {
String issuer = hsr.getHeader("X-AAI-SSL-Issuer");
if (issuer != null && !issuer.isEmpty()) {
// the haproxy header replaces the ', ' with '/' and reverses on the '/' need to undo that.
List<String> broken = Arrays.asList(issuer.split("/"));
broken = broken.stream().filter(s -> !s.isEmpty()).collect(Collectors.toList());
Collections.reverse(broken);
issuer = String.join(", ", broken);
} else {
if (hsr.getAttribute("javax.servlet.request.cipher_suite") != null) {
X509Certificate[] certChain = (X509Certificate[]) hsr.getAttribute("javax.servlet.request.X509Certificate");
if (certChain != null && certChain.length > 0) {
X509Certificate clientCert = certChain[0];
issuer = clientCert.getIssuerX500Principal().getName();
}
}
}
return issuer;
}
private String getHttpMethod(ContainerRequestContext requestContext) {
String httpMethod = requestContext.getMethod();
if ("POST".equalsIgnoreCase(httpMethod)
&& "PATCH".equals(requestContext.getHeaderString(AAIHeaderProperties.HTTP_METHOD_OVERRIDE))) {
httpMethod = HttpMethod.MERGE_PATCH.toString();
}
if (httpMethod.equalsIgnoreCase(HttpMethod.MERGE_PATCH.toString()) || "patch".equalsIgnoreCase(httpMethod)) {
httpMethod = HttpMethod.PUT.toString();
}
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 Optional<Response> authorize(String uri, String httpMethod, List<MediaType> acceptHeaderValues,
String authUser, String haProxyUser, String issuer) {
Response response = null;
try {
if (!aaiAuthCore.authorize(authUser, uri, httpMethod, haProxyUser, issuer)) {
throw new AAIException("AAI_9101", "Request on " + httpMethod + " " + uri + " status is not OK");
}
} catch (AAIException e) {
response = Response.status(e.getErrorObject().getHTTPResponseCode())
.entity(ErrorLogHelper.getRESTAPIErrorResponseWithLogging(acceptHeaderValues, e, new ArrayList<>()))
.build();
}
return Optional.ofNullable(response);
}
}
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