SignedReport.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2011 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.turro.zkoss.print;
 
import com.lowagie.text.DocumentException;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfSignatureAppearance;
import com.lowagie.text.pdf.PdfStamper;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.turro.elephant.context.Application;
import org.turro.elephant.context.ElephantContext;
import org.turro.elephant.impl.context.ContextFactory;
import org.turro.elephant.impl.security.CertificateStore;
import org.zkoss.util.media.AMedia;
import org.zkoss.util.media.Media;
import org.zkoss.zkex.zul.Jasperreport;
 
public class SignedReport extends Jasperreport {
 
  private String certificateStore;
 
  public String getCertificateStore() {
    return certificateStore;
  }
 
  public void setCertificateStore(String certificateStore) {
    this.certificateStore = certificateStore;
  }
 
  @Override
  public Object getExtraCtrl() {
    return new SignCtrl();
  }
 
  protected class SignCtrl extends Jasperreport.ExtraCtrl {
    @Override
        public Media getMedia(String pathInfo) {
      try {
        CertificateStore cs = "pdf".equals(getType()) ?
          (CertificateStore) ContextFactory.getImplementation(
                        Application.getApplication().getConstructor(), "ICertificateStore_" + certificateStore) : null;
        if(cs != null) {
          Media media = super.getMedia(pathInfo);
          PdfReader in = new PdfReader(media.getStreamData());
          ByteArrayOutputStream out = new ByteArrayOutputStream();
          PdfStamper stp = PdfStamper.createSignature(in, out, '\0');
          PdfSignatureAppearance sap = stp.getSignatureAppearance();
          sap.setCrypto(cs.getKey(), cs.getChain(), null, PdfSignatureAppearance.WINCER_SIGNED);
          sap.setReason((String) cs.getAttributes().get("reason"));
          sap.setLocation((String) cs.getAttributes().get("location"));
          if("true".equals((String) cs.getAttributes().get("visible"))) {
            sap.setVisibleSignature(new Rectangle(
                    cs.getLongAttribute("ltx"),
                    cs.getLongAttribute("lty"),
                    cs.getLongAttribute("rbx"),
                    cs.getLongAttribute("rby")
                    ), 1, null);
          }
          stp.close();
          return new AMedia(media.getName(), media.getFormat(), media.getContentType(), out.toByteArray());
          //Events.postEvent(new URIEvent("", SignedReport.this, null));
          //return new AMedia(media.getName(), media.getFormat(), "application/octet-stream", out.toByteArray());
        } else {
          return super.getMedia(pathInfo);
          //Events.postEvent(new Event(Events.ON_URI_CHANGE, SignedReport.this));
          //Media media = super.getMedia(pathInfo);
          //return new AMedia(media.getName(), media.getFormat(), "application/octet-stream", media.getStreamData());
        }
      } catch (DocumentException | IOException ex) {
        Logger.getLogger(SignedReport.class.getName()).log(Level.SEVERE, ElephantContext.logMsg(null), ex);
      }
      return null;
    }
    }
 
}