/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.cxf.rs.security.jose.jaxrs;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import javax.annotation.Priority;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.ext.WriterInterceptor;
import javax.ws.rs.ext.WriterInterceptorContext;
import org.apache.cxf.common.util.Base64UrlOutputStream;
import org.apache.cxf.common.util.Base64UrlUtility;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.io.CachedOutputStream;
import org.apache.cxf.jaxrs.json.basic.JsonMapObjectReaderWriter;
import org.apache.cxf.jaxrs.utils.JAXRSUtils;
import org.apache.cxf.rs.security.jose.common.JoseConstants;
import org.apache.cxf.rs.security.jose.common.JoseHeaders;
import org.apache.cxf.rs.security.jose.jws.JwsHeaders;
import org.apache.cxf.rs.security.jose.jws.JwsJsonOutputStream;
import org.apache.cxf.rs.security.jose.jws.JwsJsonProducer;
import org.apache.cxf.rs.security.jose.jws.JwsSignature;
import org.apache.cxf.rs.security.jose.jws.JwsSignatureProvider;
@Priority(Priorities.JWS_WRITE_PRIORITY)
public class JwsJsonWriterInterceptor extends AbstractJwsJsonWriterProvider implements WriterInterceptor {
private Set<String> protectedHttpHeaders;
private boolean protectHttpHeaders;
private JsonMapObjectReaderWriter writer = new JsonMapObjectReaderWriter();
private boolean contentTypeRequired = true;
private boolean useJwsOutputStream;
private boolean encodePayload = true;
@Override
public void aroundWriteTo(WriterInterceptorContext ctx) throws IOException, WebApplicationException {
if (ctx.getEntity() == null) {
ctx.proceed();
return;
}
List<JwsSignatureProvider> sigProviders = getInitializedSigProviders();
OutputStream actualOs = ctx.getOutputStream();
if (useJwsOutputStream) {
List<String> protectedHeaders = new ArrayList<>(sigProviders.size());
List<JwsSignature> signatures = new ArrayList<>(sigProviders.size());
for (JwsSignatureProvider signer : sigProviders) {
JwsHeaders protectedHeader = prepareProtectedHeader(ctx, signer);
String encoded = Base64UrlUtility.encode(writer.toJson(protectedHeader));
protectedHeaders.add(encoded);
JwsSignature signature = signer.createJwsSignature(protectedHeader);
byte[] start = StringUtils.toBytesUTF8(encoded + ".");
signature.update(start, 0, start.length);
signatures.add(signature);
}
ctx.setMediaType(JAXRSUtils.toMediaType(JoseConstants.MEDIA_TYPE_JOSE_JSON));
actualOs.write(StringUtils.toBytesUTF8("{\"payload\":\""));
JwsJsonOutputStream jwsStream = new JwsJsonOutputStream(actualOs, protectedHeaders, signatures);
Base64UrlOutputStream base64Stream = null;
if (encodePayload) {
base64Stream = new Base64UrlOutputStream(jwsStream);
ctx.setOutputStream(base64Stream);
} else {
ctx.setOutputStream(jwsStream);
}
ctx.proceed();
if (encodePayload) {
base64Stream.flush();
}
jwsStream.flush();
} else {
CachedOutputStream cos = new CachedOutputStream();
ctx.setOutputStream(cos);
ctx.proceed();
JwsJsonProducer p = new JwsJsonProducer(new String(cos.getBytes(), StandardCharsets.UTF_8));
for (JwsSignatureProvider signer : sigProviders) {
JwsHeaders protectedHeader = prepareProtectedHeader(ctx, signer);
p.signWith(signer, protectedHeader, null);
}
ctx.setMediaType(JAXRSUtils.toMediaType(JoseConstants.MEDIA_TYPE_JOSE_JSON));
writeJws(p, actualOs);
}
}
private JwsHeaders prepareProtectedHeader(WriterInterceptorContext ctx,
JwsSignatureProvider signer) {
JwsHeaders headers = new JwsHeaders();
headers.setSignatureAlgorithm(signer.getAlgorithm());
setContentTypeIfNeeded(headers, ctx);
if (!encodePayload) {
headers.setPayloadEncodingStatus(false);
}
protectHttpHeadersIfNeeded(ctx, headers);
return headers;
}
public void setContentTypeRequired(boolean contentTypeRequired) {
this.contentTypeRequired = contentTypeRequired;
}
public void setUseJwsJsonOutputStream(boolean useJwsJsonOutputStream) {
this.useJwsOutputStream = useJwsJsonOutputStream;
}
private void setContentTypeIfNeeded(JoseHeaders headers, WriterInterceptorContext ctx) {
if (contentTypeRequired) {
MediaType mt = ctx.getMediaType();
if (mt != null
&& !JAXRSUtils.mediaTypeToString(mt).equals(JoseConstants.MEDIA_TYPE_JOSE_JSON)) {
if ("application".equals(mt.getType())) {
headers.setContentType(mt.getSubtype());
} else {
headers.setContentType(JAXRSUtils.mediaTypeToString(mt));
}
}
}
}
public void setEncodePayload(boolean encodePayload) {
this.encodePayload = encodePayload;
}
protected void protectHttpHeadersIfNeeded(WriterInterceptorContext ctx, JwsHeaders jwsHeaders) {
if (protectHttpHeaders) {
JoseJaxrsUtils.protectHttpHeaders(ctx.getHeaders(),
jwsHeaders,
protectedHttpHeaders);
}
}
public void setProtectHttpHeaders(boolean protectHttpHeaders) {
this.protectHttpHeaders = protectHttpHeaders;
}
public void setProtectedHttpHeaders(Set<String> protectedHttpHeaders) {
this.protectedHttpHeaders = protectedHttpHeaders;
}
}