/*
* Copyright(c) 2002 Center for E-Commerce Infrastructure Development, The
* University of Hong Kong (HKU). All Rights Reserved.
*
* This software is licensed under the Academic Free License Version 1.0
*
* Academic Free License
* Version 1.0
*
* This Academic Free License applies to any software and associated
* documentation (the "Software") whose owner (the "Licensor") has placed the
* statement "Licensed under the Academic Free License Version 1.0" immediately
* after the copyright notice that applies to the Software.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of the Software (1) to use, copy, modify, merge, publish, perform,
* distribute, sublicense, and/or sell copies of the Software, and to permit
* persons to whom the Software is furnished to do so, and (2) under patent
* claims owned or controlled by the Licensor that are embodied in the Software
* as furnished by the Licensor, to make, use, sell and offer for sale the
* Software and derivative works thereof, subject to the following conditions:
*
* - Redistributions of the Software in source code form must retain all
* copyright notices in the Software as furnished by the Licensor, this list
* of conditions, and the following disclaimers.
* - Redistributions of the Software in executable form must reproduce all
* copyright notices in the Software as furnished by the Licensor, this list
* of conditions, and the following disclaimers in the documentation and/or
* other materials provided with the distribution.
* - Neither the names of Licensor, nor the names of any contributors to the
* Software, nor any of their trademarks or service marks, may be used to
* endorse or promote products derived from this Software without express
* prior written permission of the Licensor.
*
* DISCLAIMERS: LICENSOR WARRANTS THAT THE COPYRIGHT IN AND TO THE SOFTWARE IS
* OWNED BY THE LICENSOR OR THAT THE SOFTWARE IS DISTRIBUTED BY LICENSOR UNDER
* A VALID CURRENT LICENSE. EXCEPT AS EXPRESSLY STATED IN THE IMMEDIATELY
* PRECEDING SENTENCE, THE SOFTWARE IS PROVIDED BY THE LICENSOR, CONTRIBUTORS
* AND COPYRIGHT OWNERS "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* LICENSOR, CONTRIBUTORS OR COPYRIGHT OWNERS BE LIABLE FOR ANY CLAIM, DAMAGES
* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE.
*
* This license is Copyright (C) 2002 Lawrence E. Rosen. All rights reserved.
* Permission is hereby granted to copy and distribute this license without
* modification. This license may not be modified without the express written
* permission of its copyright owner.
*/
/* =====
*
* $Header: /home/cvsroot/ebxml-pkg/src/hk/hku/cecid/ebms/pkg/pki/DocumentResolver.java,v 1.1 2005/07/28 09:36:24 dcmsze Exp $
*
* Code authored by:
*
* kcyee [2002-05-16]
*
* Code reviewed by:
*
* username [YYYY-MM-DD]
*
* Remarks:
*
* =====
*/
package hk.hku.cecid.ebms.pkg.pki;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import org.apache.xml.security.signature.XMLSignatureInput;
import org.apache.xml.security.utils.resolver.ResourceResolverException;
import org.apache.xml.security.utils.resolver.ResourceResolverSpi;
import org.w3c.dom.Attr;
/**
* This class is needed by the Apache XML Security library for locating
* and loading the document attachments.
*
* @author kcyee
* @version $Revision: 1.1 $
*/
public class DocumentResolver extends ResourceResolverSpi {
/**
* Internal variable for holding the document parameters.
*/
protected DocumentDetail[] docs;
/**
* Construct with an array of document parameters.
*
* @param docs array of document parameters
*/
public DocumentResolver(DocumentDetail[] docs) {
super();
this.docs = docs;
}
/**
* Gets the document (encapsulated in the XMLSignatureInput object)
* by specifying the URI.
*
* @param uri
* @param baseUri
* @return the document encapsulated in the XMLSignatureInput object
*/
public XMLSignatureInput engineResolve(Attr uri, String baseUri)
throws ResourceResolverException {
String href = uri.getNodeValue();
if (!href.startsWith("cid:")) {
Object exArgs[] = {"Reference URI does not start with 'cid:'"};
throw new ResourceResolverException(href, exArgs, uri, baseUri);
}
int found = -1;
for (int i=0 ; i<docs.length ; i++) {
if (docs[i].uri != null && docs[i].uri.equals(href)) {
found = i;
break;
}
}
if (found < 0) {
Object exArgs[] = {"Reference URI = " + href + " does not exist!"};
throw new ResourceResolverException(href, exArgs, uri, baseUri);
}
XMLSignatureInput input;
try {
final InputStream in = docs[found].stream;
final ByteArrayOutputStream out = new ByteArrayOutputStream();
final byte[] buffer = new byte[4096];
for (int c=in.read(buffer) ; c!=-1 ; c=in.read(buffer))
out.write(buffer, 0, c);
input = new XMLSignatureInput(out.toByteArray());
}
catch (Exception e) {
throw new ResourceResolverException(href, e, uri, baseUri);
}
input.setSourceURI(href);
input.setMIMEType(docs[found].contentType);
return input;
}
/**
* Sees whether the resolver can resolve the document specified by
* the URI or not.
*
* @param uri
* @param baseUri
* @return true if the resolver can locate the document specified, false
* if otherwise.
*/
public boolean engineCanResolve(Attr uri, String baseUri) {
String href = uri.getNodeValue();
if (href.startsWith("cid:")) {
for (int i=0 ; i<docs.length ; i++) {
if (docs[i].uri != null && docs[i].uri.equals(href)) {
return true;
}
}
}
return false;
}
}