Thank you so much for your feedback.
Hope to hear news about the solution tomorrow, and if it is not going to be
fixed in C# yet, please, let me know so that I can change my downloaded
source code meanwhile.
Regards,
Jose.
El martes, 28 de agosto de 2012, Paulo Soares escribió:
> It's a bug both in Java and C#. It only happens with PDFs with
> compressed object streams. It will be fixed tomorrow.
>
> Paulo
>
> On Tue, Aug 28, 2012 at 5:16 PM, José Santiago Bonilla Pazmiño
> <[email protected]> wrote:
> > Sure, attached an example from the external tool that generates the PDFs.
> >
> > When signing the original "reader" everything is OK, but when signing the
> > duplicate "readerCopy", Adobe Reader X shows error:
> > "There was a problem reading this document (14)"
> >
> > I tried with some PDF files from the same source, and the same behaviour.
> >
> > And, this is the code, with iTextSharp 5.3.2:
> >
> > String CERT_PATH = "../signingCert.p12";
> > String CERT_PASSW = "Password";
> >
> > string IN_FILE = "manual_desobediencia.pdf";
> > string OUT_FILE = "manual_desobediencia_signed.pdf";
> >
> > FileStream fs = new FileStream(CERT_PATH, FileMode.Open);
> > Pkcs12Store ks = new Pkcs12Store(fs, CERT_PASSW.ToCharArray());
> > string alias = null;
> > foreach (string al in ks.Aliases)
> > {
> > if (ks.IsKeyEntry(al) && ks.GetKey(al).Key.IsPrivate)
> > {
> > alias = al;
> > break;
> > }
> > }
> > fs.Close();
> > ICipherParameters pk = ks.GetKey(alias).Key;
> > X509CertificateEntry[] x = ks.GetCertificateChain(alias);
> > X509Certificate[] chain = new X509Certificate[x.Length];
> > for (int k = 0; k < x.Length; ++k)
> > {
> > chain[k] = x[k].Certificate;
> > }
> >
> > PdfReader reader = new PdfReader(IN_FILE);
> > PdfReader readerCopy = new PdfReader(reader);
> >
> > FileStream fout = new FileStream(OUT_FILE, FileMode.Create);
> > PdfStamper stp = PdfStamper.CreateSignature(readerCopy, fout, '\0', null,
> > true);
> > PdfSignatureAppearance sap = stp.SignatureAppearance;
> > sap.SetVisibleSignature(new iTextSharp.text.Rectangle(100, 100, 300,
> 200),
> > 1, "Signature");
> >
> > IExternalSignature es = new PrivateKeySignature(pk, "SHA-256");
> >
> > MakeSignature.SignDetached(sap, es, chain, null, null, null, 0,
> > CryptoStandard.CADES);
> >
> > El martes, 28 de agosto de 2012, Paulo Soares escribió:
> >
> >> Works for me in C#. Can you post the PDF you use?
> >>
> >> Paulo
> >>
> >> On Tue, Aug 28, 2012 at 2:52 PM, José Santiago Bonilla Pazmiño
> >> <[email protected]> wrote:
> >> > Thanks Michael,
> >> >
> >> > I think there is some diference between Java and C#. I tried this code
> >> > without running anything else than the copy and the signature of that
> >> > copy,
> >> > and Error 14 in Adobe Reader again.
> >> >
> >> > I will keep trying, hope to find a solution.
> >> >
> >> > Regards,
> >> >
> >> > Jose.
> >> >
> >> > El martes, 28 de agosto de 2012, mkl escribió:
> >> >
> >> >> José,
> >> >>
> >> >> José Santiago Bonilla Pazmiño wrote
> >> >> > PdfReader pdfCopy = new PdfReader(pdf); //I need to keep the
> original
> >> >> > PdfReader for a background process, reading again the file takes 20
> >> >> > secs
> >> >> > per each.
> >> >> >
> >> >> > After that, I tried to sign the pdfCopy:
> >> >>
> >> >> I just tested this using iText TRUNK for Java: I created one original
> >> >> PdfReader. Then I twice created a copy using the copy constructor and
> >> >> signed
> >> >> that copy. There is no problem with the resulting signatures.
> >> >>
> >> >> Maybe the problem is your "background process". If that background
> >> >> process
> >> >> runs in a separate thread, you probably create a copy when the
> original
> >> >> is
> >> >> in some dirty state. In that case the background process should use a
> >> >> separate PdfReader copy and the original PdfReader should only be
> used
> >> >> to
> >> >> take copies from.
> >> >>
> >> >> Maybe, on the other hand, there is some difference between the Java
> and
> >> >> the
> >> >> C# version.
> >> >>
> >> >> Regards, Michael
--
Saludos cordiales,
José Bonilla
(+593) 95031497
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