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From Dave Smith <dave.sm...@candata.com>
Subject Re: Get page count from encrypted document
Date Mon, 23 Jun 2014 12:45:48 GMT
I would suggest you open up the PDF in a text editor and see if you can a
page object with it's count. On all of my examples those objects are
encrypted with the key so there is no way for pdf box to figure out how
many pages there are


On Mon, Jun 23, 2014 at 5:42 AM, Gilad Denneboom <gilad.denneboom@gmail.com>
wrote:

> I agree in principle, but there could be some technical issues that prevent
> it, as an encryption policy is basically a type of digital signature that
> is applied to the file.
>
>
> On Mon, Jun 23, 2014 at 11:36 AM, John Milne <JMilne@phlexglobal.com>
> wrote:
>
> > Hi,
> >
> > Agreed, but there are different levels of security available on a PDF.
> > Simple security such as preventing changing a document, commenting it, or
> > form field fill in should not prevent a page count being returned without
> > calling the openProtection() method first.
> >
> > If you can view the document, then the page count should be available. To
> > my mind anyhow.
> >
> > Regards
> >
> > John
> >
> > -----Original Message-----
> > From: Gilad Denneboom [mailto:gilad.denneboom@gmail.com]
> > Sent: 23 June 2014 10:14
> > To: users@pdfbox.apache.org
> > Subject: Re: Get page count from encrypted document
> >
> > The entire point of encryption is to prevent someone without the right
> > knowledge (the password) from gaining access to the contents of your
> file,
> > such as the number of pages in it.
> >
> >
> > On Mon, Jun 23, 2014 at 10:38 AM, John Milne <JMilne@phlexglobal.com>
> > wrote:
> >
> > > One last question for someone.
> > > Why do we need to decrypt the PDF to simply get the page count?
> > >
> > > Thanks
> > >
> > > John
> > >
> > > -----Original Message-----
> > > From: John Milne [mailto:JMilne@phlexglobal.com]
> > > Sent: 20 June 2014 14:43
> > > To: users@pdfbox.apache.org
> > > Subject: RE: Get page count from encrypted document
> > >
> > > Thanks Dave,
> > >
> > > That appears to do the trick.
> > >
> > > Best regards
> > >
> > > John
> > >
> > > -----Original Message-----
> > > From: Dave Smith [mailto:dave.smith@candata.com]
> > > Sent: 20 June 2014 14:09
> > > To: users@pdfbox.apache.org
> > > Subject: Re: Get page count from encrypted document
> > >
> > > After you load the document
> > >
> > > if(document.isEncrypted())
> > >             {
> > >                 document.openProtection(new
> > > StandardDecryptionMaterial(""));
> > >             }
> > >
> > > In the "" enter the password if required.
> > >
> > >
> > >
> > >
> > > On Fri, Jun 20, 2014 at 9:04 AM, Gilad Denneboom <
> > > gilad.denneboom@gmail.com>
> > > wrote:
> > >
> > > > What kind of security? If it's a file-open password then you can't
> > > > get any information about it (at least in any Adobe apps), until you
> > > > provide the password.
> > > >
> > > >
> > > > On Fri, Jun 20, 2014 at 2:39 PM, John Milne <JMilne@phlexglobal.com>
> > > > wrote:
> > > >
> > > > > Hi,
> > > > >
> > > > >
> > > > >
> > > > > I have a number of PDF’s with various levels of security and need
> > > > > to be able to get a page count from them.
> > > > >
> > > > > The getNumberOfPages call fails to return a value with a document
> > > > > that is secured, while Adobe reader and windows preview are able
> > > > > to get the page count.
> > > > >
> > > > >
> > > > >
> > > > > [image: cid:image001.jpg@01CF8C8B.EAAF6620]
> > > > >
> > > > >
> > > > >
> > > > > PDDocument doc = PDDocument.load(new File(args[0]));
> > > > >
> > > > > int count = doc.getNumberOfPages();
> > > > >
> > > > >
> > > > >
> > > > > Does anyone have any thoughts as to why and how I can get a page
> > count?
> > > > >
> > > > >
> > > > >
> > > > > Regards
> > > > >
> > > > >
> > > > >
> > > > > John
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > [image: Description: Phlex-small-png.png]
> > > > >
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> > > > >
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> > > > >
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> > > > >
> > > > >
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