Re: 128-bit encryption, no owner password

> -----Original Message-----
> From: IT_Hank [mailto:KHendricks@...]
> Sent: Friday, June 26, 2009 3:50 PM
> To: itextsharp-questions@...
> Subject: Re: [itextsharp-questions] 128-bit encryption, no
> owner password
>
>
> Hi Paulo, sorry to beat this to death, but I still couldn't find the
> referenced text in the latest PDF reference.  
>
> From your message, it seems to be indicating that developers
> of software
> like PDF readers should respect the passwords and encryptions
> of the PDF
> documents that they are reading.  I don't see how this applys
> to iText and
> why iText should be required to automatically set the
> permissions password
> on generated PDF documents seeing these documents are being
> created and not
> consumed.  And if it is the wish of the PDF authour not to
> set a permissions
> password, then consumers of that PDF will need to respect
> that as well.
>
> Thank you.  
>
> Kevin
>
> IT_Hank wrote:
> >
> > Thanks Paulo for the information.
> >
> > -----Original Message-----
> > From: Paulo Soares [mailto:psoares@...]
> > Sent: Saturday, June 13, 2009 4:41 AM
> > To: Post all your questions about iTextSharp here
> > Subject: Re: [itextsharp-questions] 128-bit encryption, no
> owner password
> >
> > From the PDF reference:
> >
> > Authors of software that accepts input in the form of the Portable
> > Document
> > Format must make reasonable efforts to ensure that the software they
> > create
> > respects
> > the access permissions and permissions controls listed in
> Table 3.20 of
> > this specification, to the extent that they are used in any
> particular
> > document.
> > These access permissions express the rights that the
> document's author has
> > granted to users of the document. It is the responsibility
> of Portable
> > Document
> > Format consumer software to respect the author's intent.
> >
> > Paulo
> >
> > ----- Original Message -----
> > From: "IT_Hank" <KHendricks@...>
> > To: <itextsharp-questions@...>
> > Sent: Friday, June 12, 2009 10:39 PM
> > Subject: Re: [itextsharp-questions] 128-bit encryption, no
> owner password
> >
> >
> >>
> >> Hello Paulo,
> >>
> >> I have been looking on the Adobe site for the license that
> indicates that
> >> a
> >> owner password is required on a PDF document ("legal
> imposition).  I was
> >> wondering if you could point me to the correct license
> agreement that
> >> includes this text.  I need to pass this on to our
> business leaders.
> >>
> >> Thank you,
> >>
> >> Kevin
> >>
> >>
> >> Paulo Soares wrote:
> >>>
> >>> That's a legal imposition from Adobe. You must have the
> owner password.
> >>>
> >>> Paulo
> >>>
> >>>> -----Original Message-----
> >>>> From: itextsharp-questions-bounces@...
> >>>> [mailto:itextsharp-questions-bounces@...]
> >>>> On Behalf Of IT_Hank
> >>>> Sent: Tuesday, May 13, 2008 4:00 PM
> >>>> To: itextsharp-questions@...
> >>>> Subject: [itextsharp-questions] 128-bit encryption, no
> owner password
> >>>>
> >>>>
> >>>> We have an application that is creating a 128-bit encrypted
> >>>> PDF without user
> >>>> or owner passwords.  When performing a PdfCopy.GetImportPage
> >>>> method call,
> >>>> the GetImportPage method fails in version 4.1.1.0.  This
> >>>> worked in version
> >>>> 3.1.6.0.
> >>>>
> >>>> The error might stem from the following:
> >>>>
> >>>> //this is the error being thrown because false is being
> returend from
> >>>> "IsOpenedWillFullPermissions".
> >>>>
> >>>>         internal PdfImportedPage GetImportedPage(int
> pageNumber) {
> >>>>             if (!reader.IsOpenedWithFullPermissions)
> >>>>                 throw new ArgumentException("PdfReader not
> >>>> opened with owner
> >>>> password");
> >>>>
> >>>> //this method returns false if encrypted and no password
> is supplied.
> >>>>
> >>>>         public bool IsOpenedWithFullPermissions {
> >>>>             get {
> >>>>                 return !encrypted || ownerPasswordUsed;
> >>>>             }
> >>>>         }
> >>>>
> >>>> //this is the calling code
> >>>> Snippet one...
> >>>>      if (reportGuid != Guid.Empty)
> >>>>      {
> >>>>         SQLFileInfo inputInfo = new SQLFileInfo(reportGuid);
> >>>>         using (SQLFileStream inputStream =
> >>>> inputInfo.Open(System.IO.FileMode.Open))
> >>>>         {
> >>>>             reader = new PdfReader(inputStream, null);
> >>>>             if (copy == null)
> >>>>             {
> >>>>                 doc = new
> Document(reader.GetPageSizeWithRotation(1));
> >>>>                 copy = new PdfCopy(doc, outputStream);
> >>>>                 doc.Open();
> >>>>              }
> >>>>             //copy the pages
> >>>>              CopyPages(copy, reader);
> >>>>           }
> >>>>    }
> >>>>
> >>>> Snippet two...
> >>>>         private void CopyPages(PdfCopy copy, PdfReader reader)
> >>>>         {
> >>>>             for (int i = 1; i <= reader.NumberOfPages; i++)
> >>>>             {
> >>>>                 //This is where the error happens
> >>>>                 copy.AddPage(copy.GetImportedPage(reader, i));
> >>>>             }
> >>>>         }