Hi Michael! We also need a quick fix to the problem - as we do not need any functionality but Signature verification, we do not change the PDf and hence will not have problems with PdfStamper and PdfCopy* classes. Would it be possible to send me the codding of your hepler method?
kr Don mkl wrote: > > Hello, > > I happened to come across signatures just like the one Andreas Kühne > posted in September. As I need to be able to handle these signatures > fairly soon (at least it looks like a greater hassle to persuade my users > not to use the secunet application that creates these signatures), I > created a small helper method that adds these signature fields not > referenced in the annotation arrays of the document pages; this helper has > to be applied to an AcroFields instance right after getting it from the > PdfReader. Essentially it replaces the data collected by AcroFields.fill() > with an extended set of fields in a way inspired by the that very method. > > It seems to work alright in my first tests, even though there might be > some object releasing still to do; and obviously the duplicate code inside > that method is not artful coding. > > Primarily I do wonder, though, whether iText might have any trouble when > later confronted with these additional entries among its fields, > especially considering the PdfStamper and PdfCopy* classes when writing > derived PDF documents. > > Regards, Michael. > > > Paulo Soares <psoares <at> glintt.com> writes: > >> I'm not sure if this is a bug from iText but this things appear now and >> then and, >> like it or not, if it works in Acrobat it must be right. I'll "fix" it. >> >> Paulo >> >> > -----Original Message----- >> > From: itext-questions-bounces <at> lists.sourceforge.net >> > [mailto:itext-questions-bounces <at> lists.sourceforge.net] On >> > Behalf Of Andreas Kuehne >> > Sent: Tuesday, September 09, 2008 4:08 PM >> > To: Post all your questions about iText here >> > Subject: [iText-questions] Signature not found : Bug or feature ? >> > >> > Hi, >> > >> > I'm not sure whether I'm going to submit a bug or request a >> > new feature : >> > >> > The AcroFields class has method returning all signatures ( >> > getSignatureNames() ). >> > >> > Now I came across a pdf with a signature that doesn't get >> > returned by getSignatureNames(). On the other hand the >> > Acrobat Reader shows the signature without any problems. >> > >> > Analyzing the code shows that AcroFields are expected to be >> > related to a page. But the signature doesn't ! >> > So my question is : >> > >> > Is it a bug to expect every signature to be assigned to a >> > page ( what isn't neccessarily so ) ? >> > Or do AcroFields are expected to be page-related 'by nature', >> > so my signature is just no AcroField and I must look for >> > another way to retrieve the signature ? >> > >> > The problematic signed PDF is attached. >> > >> > Opinions welcome >> > >> > Andreas > > -- > "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ... > Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail > > /* $Id:$ > */ > package com.lowagie.text.pdf; > > import java.util.ArrayList; > import java.util.HashMap; > import java.util.Iterator; > import java.util.Map; > > import com.lowagie.text.pdf.AcroFields.Item; > > public class AcroFieldsHelper > { > public static void fill(AcroFields acroFields) { > acroFields.fields = new HashMap(); > PdfDictionary top = > (PdfDictionary)PdfReader.getPdfObjectRelease(acroFields.reader.getCatalog().get(PdfName.ACROFORM)); > if (top == null) > return; > PdfArray arrfds = > (PdfArray)PdfReader.getPdfObjectRelease(top.get(PdfName.FIELDS)); > if (arrfds == null || arrfds.size() == 0) > return; > Map fields = collectFields(arrfds, null); > System.out.println("Acrofields found: " + fields); > arrfds = null; > for (int k = 1; k <= acroFields.reader.getNumberOfPages(); ++k) { > PdfDictionary page = acroFields.reader.getPageNRelease(k); > PdfArray annots = > (PdfArray)PdfReader.getPdfObjectRelease(page.get(PdfName.ANNOTS), page); > if (annots == null) > continue; > ArrayList arr = annots.getArrayList(); > for (int j = 0; j < arr.size(); ++j) { > System.out.println("\nAnnotation " + arr.get(j)); > PdfObject annoto = > PdfReader.getPdfObject((PdfObject)arr.get(j), annots); > if (!(annoto instanceof PdfDictionary)) { > > PdfReader.releaseLastXrefPartial((PdfObject)arr.get(j)); > continue; > } > PdfDictionary annot = (PdfDictionary)annoto; > if (!PdfName.WIDGET.equals(annot.get(PdfName.SUBTYPE))) { > > PdfReader.releaseLastXrefPartial((PdfObject)arr.get(j)); > continue; > } > PdfDictionary widget = annot; > PdfDictionary dic = new PdfDictionary(); > dic.putAll(annot); > String name = ""; > PdfDictionary value = null; > PdfObject lastV = null; > while (annot != null) { > dic.mergeDifferent(annot); > PdfString t = > (PdfString)PdfReader.getPdfObject(annot.get(PdfName.T)); > if (t != null) > name = t.toUnicodeString() + "." + name; > if (lastV == null && annot.get(PdfName.V) != null) > lastV = > PdfReader.getPdfObjectRelease(annot.get(PdfName.V)); > if (value == null && t != null) { > value = annot; > if (annot.get(PdfName.V) == null && lastV != > null) > value.put(PdfName.V, lastV); > } > PdfObject parent = annot.get(PdfName.PARENT); > if (parent instanceof PdfIndirectReference) > { > System.out.println(" has parent " + parent); > Integer number = new > Integer(((PdfIndirectReference)parent).getNumber()); > fields.remove(number); > } > annot = (PdfDictionary)PdfReader.getPdfObject(parent, > annot); > } > if (name.length() > 0) > name = name.substring(0, name.length() - 1); > Item item = (Item)acroFields.fields.get(name); > if (item == null) { > item = new Item(); > acroFields.fields.put(name, item); > } > if (value == null) > item.values.add(widget); > else > item.values.add(value); > item.widgets.add(widget); > item.widget_refs.add(arr.get(j)); // must be a reference > if (top != null) > dic.mergeDifferent(top); > item.merged.add(dic); > item.page.add(new Integer(k)); > item.tabOrder.add(new Integer(j)); > } > } > System.out.println("Acrofields unaccounted for: " + fields); > for(Iterator itUnbound = fields.entrySet().iterator(); > itUnbound.hasNext(); ) > { > Map.Entry unboundEntry = (Map.Entry)itUnbound.next(); > System.out.println("\nUnbound " + unboundEntry.getValue()); > PdfDictionary field = (PdfDictionary) > PdfReader.getPdfObject((PdfObject) unboundEntry.getValue()); > PdfDictionary dic = new PdfDictionary(); > dic.putAll(field); > String name = ""; > PdfDictionary value = null; > PdfObject lastV = null; > while (field != null) { > dic.mergeDifferent(field); > PdfString t = > (PdfString)PdfReader.getPdfObject(field.get(PdfName.T)); > if (t != null) > name = t.toUnicodeString() + "." + name; > if (lastV == null && field.get(PdfName.V) != null) > lastV = > PdfReader.getPdfObjectRelease(field.get(PdfName.V)); > if (value == null && t != null) { > value = field; > if (field.get(PdfName.V) == null && lastV != null) > value.put(PdfName.V, lastV); > } > PdfObject parent = field.get(PdfName.PARENT); > if (parent instanceof PdfIndirectReference) > { > System.out.println(" has parent " + parent); > Integer number = new > Integer(((PdfIndirectReference)parent).getNumber()); > fields.remove(number); > } > field = (PdfDictionary)PdfReader.getPdfObject(parent, > field); > } > if (name.length() > 0) > name = name.substring(0, name.length() - 1); > Item item = (Item)acroFields.fields.get(name); > if (item == null) { > item = new Item(); > acroFields.fields.put(name, item); > } > if (value == null) > item.values.add(field); > else > item.values.add(value); > item.widgets.add(field); > item.widget_refs.add(unboundEntry.getValue()); // must be a > reference > if (top != null) > dic.mergeDifferent(top); > item.merged.add(dic); > item.page.add(new Integer(-1)); > item.tabOrder.add(new Integer(-1)); > } > } > > > > static Map collectFields(PdfArray pdfArray, Map fields) > { > if (fields == null) > fields = new HashMap(); > > for (int j = 0; j < pdfArray.size(); ++j) { > PdfIndirectReference fieldReference = > pdfArray.getAsIndirectObject(j); > Integer number = new Integer(fieldReference.getNumber()); > if (!fields.containsKey(number)) > { > fields.put(number, fieldReference); > PdfDictionary field = (PdfDictionary) > PdfReader.getPdfObjectRelease(fieldReference); > PdfArray contained = > (PdfArray)PdfReader.getPdfObjectRelease(field.get(PdfName.FIELDS)); > if (contained != null) > fields = collectFields(contained, fields); > } > } > > return fields; > } > } > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win great > prizes > Grand prize is a trip for two to an Open Source event anywhere in the > world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > iText-questions mailing list > iText-questions@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/itext-questions > > Buy the iText book: http://www.1t3xt.com/docs/book.php > -- View this message in context: http://www.nabble.com/Re%3A-Signature-not-found-%3A-Bug-or-feature---tp20382425p23636117.html Sent from the iText - General mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Buy the iText book: http://www.1t3xt.com/docs/book.php Check the site with examples before you ask questions: http://www.1t3xt.info/examples/ You can also search the keywords list: http://1t3xt.info/tutorials/keywords/
