be.fedict.eid.applet.service.signer.asic.ASiCURIDereferencer.java Source code

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Here is the source code for be.fedict.eid.applet.service.signer.asic.ASiCURIDereferencer.java

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/*
 * eID Applet Project.
 * Copyright (C) 2010-2011 FedICT.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version
 * 3.0 as published by the Free Software Foundation.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, see 
 * http://www.gnu.org/licenses/.
 */

package be.fedict.eid.applet.service.signer.asic;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;

import javax.xml.crypto.Data;
import javax.xml.crypto.OctetStreamData;
import javax.xml.crypto.URIDereferencer;
import javax.xml.crypto.URIReference;
import javax.xml.crypto.URIReferenceException;
import javax.xml.crypto.XMLCryptoContext;
import javax.xml.crypto.dsig.XMLSignatureFactory;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import be.fedict.eid.applet.service.signer.odf.ODFUtil;

/**
 * JSR105 URI dereferencer implementation for ASiC documents.
 * 
 * @author Frank Cornelis
 * 
 */
public class ASiCURIDereferencer implements URIDereferencer {

    private static final Log LOG = LogFactory.getLog(ASiCURIDereferencer.class);

    private final File tmpFile;

    private final byte[] data;

    private final URIDereferencer baseUriDereferener;

    public ASiCURIDereferencer(File tmpFile) {
        this(null, tmpFile);
    }

    public ASiCURIDereferencer(byte[] data) {
        this(data, null);
    }

    protected ASiCURIDereferencer(byte[] data, File tmpFile) {
        this.data = data;
        this.tmpFile = tmpFile;

        XMLSignatureFactory xmlSignatureFactory = XMLSignatureFactory.getInstance();
        this.baseUriDereferener = xmlSignatureFactory.getURIDereferencer();
    }

    public Data dereference(URIReference uriReference, XMLCryptoContext context) throws URIReferenceException {
        if (null == uriReference) {
            throw new URIReferenceException("URIReference cannot be null");
        }
        if (null == context) {
            throw new URIReferenceException("XMLCrytoContext cannot be null");
        }

        String uri = uriReference.getURI();
        try {
            uri = URLDecoder.decode(uri, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            LOG.warn("could not URL decode the uri: " + uri);
        }
        LOG.debug("dereference: " + uri);

        InputStream zipInputStream;
        if (null != this.tmpFile) {
            try {
                zipInputStream = new FileInputStream(this.tmpFile);
            } catch (FileNotFoundException e) {
                throw new URIReferenceException("file not found error: " + e.getMessage(), e);
            }
        } else {
            zipInputStream = new ByteArrayInputStream(this.data);
        }
        InputStream dataInputStream;
        try {
            dataInputStream = ODFUtil.findDataInputStream(zipInputStream, uri);
        } catch (IOException e) {
            throw new URIReferenceException("I/O error: " + e.getMessage(), e);
        }
        if (null == dataInputStream) {
            return this.baseUriDereferener.dereference(uriReference, context);
        }
        return new OctetStreamData(dataInputStream, uri, null);
    }
}