/**
* 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.wss4j.dom.message;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.UnsupportedCallbackException;
import org.apache.wss4j.common.ext.Attachment;
import org.apache.wss4j.common.ext.AttachmentRequestCallback;
import org.apache.wss4j.common.ext.AttachmentResultCallback;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* A Callback Handler implementation for the case of signing/encrypting Attachments via the SwA
* (SOAP with Attachments) specification.
*/
public class AttachmentCallbackHandler implements CallbackHandler {
private final List<Attachment> originalRequestAttachments;
private Map<String, Attachment> attachmentMap = new HashMap<String, Attachment>();
private List<Attachment> responseAttachments = new ArrayList<Attachment>();
public AttachmentCallbackHandler(List<Attachment> attachments) {
originalRequestAttachments = attachments;
if (attachments != null) {
for (Attachment attachment : attachments) {
attachmentMap.put(attachment.getId(), attachment);
}
}
}
public void handle(Callback[] callbacks)
throws IOException, UnsupportedCallbackException {
for (int i = 0; i < callbacks.length; i++) {
if (callbacks[i] instanceof AttachmentRequestCallback) {
AttachmentRequestCallback attachmentRequestCallback =
(AttachmentRequestCallback) callbacks[i];
List<Attachment> attachments =
getAttachmentsToAdd(attachmentRequestCallback.getAttachmentId());
if (attachments.isEmpty()) {
throw new RuntimeException("wrong attachment requested");
}
attachmentRequestCallback.setAttachments(attachments);
} else if (callbacks[i] instanceof AttachmentResultCallback) {
AttachmentResultCallback attachmentResultCallback =
(AttachmentResultCallback) callbacks[i];
responseAttachments.add(attachmentResultCallback.getAttachment());
attachmentMap.put(attachmentResultCallback.getAttachment().getId(),
attachmentResultCallback.getAttachment());
} else {
throw new UnsupportedCallbackException(callbacks[i], "Unrecognized Callback");
}
}
}
public List<Attachment> getResponseAttachments() {
return responseAttachments;
}
// Try to match the Attachment Id. Otherwise, add all Attachments.
private List<Attachment> getAttachmentsToAdd(String id) {
List<Attachment> attachments = new ArrayList<Attachment>();
if (attachmentMap.containsKey(id)) {
attachments.add(attachmentMap.get(id));
} else {
if (originalRequestAttachments != null) {
attachments.addAll(originalRequestAttachments);
}
}
return attachments;
}
}