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+/**
+ * <copyright> Copyright 2006 by Know-Center, Graz, Austria </copyright>
+ * PDF-AS has been contracted by the E-Government Innovation Center EGIZ, a
+ * joint initiative of the Federal Chancellery Austria and Graz University of
+ * Technology.
+ *
+ * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
+ * the European Commission - subsequent versions of the EUPL (the "Licence");
+ * You may not use this work except in compliance with the Licence.
+ * You may obtain a copy of the Licence at:
+ * http://www.osor.eu/eupl/
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the Licence is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Licence for the specific language governing permissions and
+ * limitations under the Licence.
+ *
+ * This product combines work with different licenses. See the "NOTICE" text
+ * file for details on the various modules and licenses.
+ * The "NOTICE" text file is part of the distribution. Any derivative works
+ * that you distribute must include a readable copy of the "NOTICE" text file.
+ *
+ * $Id: TextualSignator_1_0_0.java,v 1.3 2006/10/31 08:07:50 wprinz Exp $
+ */
+package at.gv.egiz.pdfas.impl.signator.textual;
+
+import java.util.HashMap;
+import java.util.Iterator;
+
+import at.gv.egiz.pdfas.api.timestamp.TimeStamper;
+import at.gv.egiz.pdfas.exceptions.ErrorCode;
+import at.gv.egiz.pdfas.exceptions.framework.SignatorException;
+import at.gv.egiz.pdfas.framework.input.DataSource;
+import at.gv.egiz.pdfas.framework.input.PdfDataSource;
+import at.gv.egiz.pdfas.framework.output.DataSink;
+import at.gv.egiz.pdfas.framework.signator.Signator;
+import at.gv.egiz.pdfas.framework.signator.SignatorInformation;
+import at.gv.egiz.pdfas.impl.input.TextDataSourceImpl;
+import at.gv.egiz.pdfas.impl.signator.IncrementalUpdateHelper;
+import at.gv.egiz.pdfas.utils.OgnlUtil;
+import at.knowcenter.wag.egov.egiz.PdfAS;
+import at.knowcenter.wag.egov.egiz.PdfASID;
+import at.knowcenter.wag.egov.egiz.cfg.OverridePropertyHolder;
+import at.knowcenter.wag.egov.egiz.exceptions.PresentableException;
+import at.knowcenter.wag.egov.egiz.framework.SignatorFactory;
+import at.knowcenter.wag.egov.egiz.pdf.IncrementalUpdateInformation;
+import at.knowcenter.wag.egov.egiz.pdf.ObjectExtractor;
+import at.knowcenter.wag.egov.egiz.pdf.PositioningInstruction;
+import at.knowcenter.wag.egov.egiz.pdf.TablePos;
+import at.knowcenter.wag.egov.egiz.sig.SignatureDataImpl;
+import at.knowcenter.wag.egov.egiz.sig.SignatureEntry;
+import at.knowcenter.wag.egov.egiz.sig.SignatureObject;
+import at.knowcenter.wag.egov.egiz.sig.SignatureTypeDefinition;
+import at.knowcenter.wag.egov.egiz.sig.SignatureTypes;
+import at.knowcenter.wag.egov.egiz.sig.signatureobject.SignatureObjectHelper;
+
+import com.lowagie.text.pdf.PdfPTable;
+
+/**
+ * Signs a document textually.
+ *
+ * <p>
+ * In prepareSign, the document text is extracted and normalized.
+ * </p>
+ * <p>
+ * In finishSign, the signed SignatureObject is transformed into a Signature
+ * block, which is then written as an Incremental Update.
+ * </p>
+ *
+ * @author wprinz
+ */
+public class TextualSignator_1_0_0 implements Signator
+{
+ /**
+ * The Pdf-AS ID of this Signator.
+ */
+ public static final PdfASID MY_ID = new PdfASID(SignatorFactory.VENDOR, SignatorFactory.TYPE_TEXTUAL, SignatorFactory.VERSION_1_0_0);
+
+ /**
+ * @see at.knowcenter.wag.egov.egiz.framework.Signator#getMyId()
+ */
+ public PdfASID getMyId()
+ {
+ return MY_ID;
+ }
+
+ /**
+ * Default constructor.
+ */
+ public TextualSignator_1_0_0()
+ {
+ // Default constructor.
+ }
+
+ /**
+ * <p>
+ * The parameter has_SIG_ID is not used by this Signator because it doesn't
+ * pre-format the signature block.
+ * </p>
+ *
+ * @see at.gv.egiz.pdfas.framework.signator.Signator#prepareSign(at.gv.egiz.pdfas.framework.input.PdfDataSource,
+ * java.lang.String, at.knowcenter.wag.egov.egiz.pdf.TablePos, boolean)
+ */
+ public SignatorInformation prepareSign(PdfDataSource pdfDataSource, String profile, TablePos pos, TimeStamper timestamper) throws SignatorException
+ {
+ try
+ {
+
+ SignatureTypeDefinition std = SignatureTypes.getInstance().getSignatureTypeDefinition(profile);
+ if (!std.isTextExtractable())
+ {
+ throw new SignatorException(ErrorCode.PROFILE_NOT_USABLE_FOR_TEXT, "The signature profile " + profile + " is not text extractable and thereby cannot be used for textual signature.");
+ }
+
+ TextualSignatorInformation tsi = new TextualSignatorInformation();
+ tsi.originalDocument = pdfDataSource;
+ tsi.profile = profile;
+ tsi.pos = pos;
+
+ String document_text = PdfAS.extractNormalizedTextTextual(pdfDataSource, this.getEncoding());
+ tsi.setNonTextualObjects(ObjectExtractor.extractNonTextInfo(pdfDataSource));
+ // logger_.debug("signed_text = " + document_text);
+
+ DataSource ds = new TextDataSourceImpl(document_text);
+ tsi.signatureData = new SignatureDataImpl(ds, "text/plain", "UTF-8");
+
+ return tsi;
+ }
+ catch (PresentableException pe)
+ {
+ throw new SignatorException(pe);
+ }
+ }
+
+ /**
+ * @see at.gv.egiz.pdfas.framework.signator.Signator#finishSign(at.gv.egiz.pdfas.framework.signator.SignatorInformation,
+ * at.gv.egiz.pdfas.framework.output.DataSink)
+ */
+ public void finishSign(SignatorInformation signatorInformation, DataSink dataSink) throws SignatorException
+ {
+ try
+ {
+ TextualSignatorInformation tsi = (TextualSignatorInformation) signatorInformation;
+
+ // PdfAS.prefixID(iui.signed_signature_object, PdfAS.TEXT_ID);
+
+ // iui.signed_signature_object.kz = getMyId().toString();
+ tsi.signSignatureObject.kz = getMyId().toString();
+ // TODO what is this for?
+
+ SignatureObject so = SignatureObjectHelper.convertSignSignatureObjectToSignatureObject(tsi.signSignatureObject, tsi.profile);
+
+ evaluteOgnl(so, tsi);
+
+ PdfPTable pdf_table = PdfAS.createPdfPTableFromSignatureObject(so);
+
+ PositioningInstruction pi = PdfAS.determineTablePositioning(tsi.pos, tsi.profile, tsi.originalDocument, pdf_table);
+
+ IncrementalUpdateInformation iui = IncrementalUpdateHelper.writeIncrementalUpdateToDataSink(tsi.originalDocument, dataSink, pdf_table, tsi.profile, pi, null, signatorInformation, so);
+ tsi.atp = iui.actualTablePos;
+
+// OutputStream os = dataSink.createOutputStream(PdfAS.PDF_MIME_TYPE);
+// os.write(signed_iui.signed_pdf);
+// os.close();
+
+// SignResult sign_result = new SignResult(PdfAS.PDF_MIME_TYPE, signed_iui.signed_pdf);
+// return sign_result;
+ }
+ catch (PresentableException pe)
+ {
+ throw new SignatorException(pe);
+ }
+ finally {
+ OverridePropertyHolder.removeOgnlUtil();
+ }
+// catch (IOException e)
+// {
+// throw new SignatorException(ErrorCode.DOCUMENT_CANNOT_BE_READ, e);
+// }
+ }
+
+ private void evaluteOgnl(SignatureObject so, TextualSignatorInformation tsi) {
+ HashMap ognlCtx = new HashMap();
+ //ognlCtx.put("iui", tsi.);
+ ognlCtx.put("sso", tsi.signSignatureObject);
+ ognlCtx.put("issuer", tsi.signSignatureObject.getIssuerDNMap());
+ ognlCtx.put("subject", tsi.signSignatureObject.getSubjectDNMap());
+ OgnlUtil ognl = new OgnlUtil(ognlCtx);
+ OverridePropertyHolder.setOgnlUtil(ognl);
+
+ Iterator it = so.getSigEntries().values().iterator();
+ while (it.hasNext())
+ {
+ SignatureEntry se = (SignatureEntry) it.next();
+
+ if (ognl.containsExpression(se.getValue())) {
+ // evaluate expression
+ String res = ognl.compileMessage(se.getValue());
+ se.setValue(res);
+ //ri.value = this.normalizer.normalize(res, true);
+
+ }
+ }
+ }
+
+ public String getEncoding() {
+ // old signatures used this encoding implicit most of the time (windows default)
+ return "cp1252";
+ }
+
+}