I'm confused. I've just generated a signature with Acrobat 7 and I have in the
/DR key:
/Encoding<</PDFDocEncoding 57 0 R>>
In the implementation note the PDF reference says:
Acrobat viewers may insert additional entries in the DR resource dictionary,
such as Encoding, as a convenience for keeping track of objects being
used to construct form fields. Such objects are not actually resources and
are not referenced from the appearance stream.
So, what's valid after all?
Paulo
________________________________
From: Leonard Rosenthol [EMAIL PROTECTED]
Sent: Thursday, November 06, 2008 5:24 PM
To: Post all your questions about iText here
Subject: Re: [iText-questions] Unrecognized PDF content: The document contains
PDF content or custom content not supported by the current version of Adobe
Reader.
You are correct - it _IS_ the /Encoding/WinANSIEncoding value inside that DR
dictionary. That isn't a valid value there - hence the error being thrown. I
suspect that's a bug in iText - easy to fix.
Leonard
On Nov 6, 2008, at 3:43 AM, Shadow Man wrote:
Hello again,
The code for signing is mostly from the iTextSharp examples Paulo provided, and
most of the low level manipulation is done to insert the pkcs7 signature into
the signature dictionary. If you want i could provide some code if it would
help you find whats causing it. Just let me know.
Also I didnt mean that the error was caused by the Encoding type, but by the
font description object inside the resource dictionary, however it does seem
strange like you said, so it probably isnt the cause.
Btw im monitoring this thread so if you need any more details just ask. I'll be
glad to help.
J.
On Thu, Nov 6, 2008 at 12:17 PM, Leonard Rosenthol <[EMAIL
PROTECTED]<mailto:[EMAIL PROTECTED]>> wrote:
Doubtful that you are on the right track - nothing wrong with using WinANSI
encoding for font data... It is more likely either a bug in iText itself or
something you did in some low level code that you wrote.
Let me take another look at the file for more details...
Leonard
On Nov 6, 2008, at 2:49 AM, Shadow Man wrote:
Hello Leonard,
First of all, thanks for your response. After reading your mail I checked the
syntax with Adobe Professional 8 and the same error came up, except for the
part where the error trigger is mentioned (since no trigger was shown).
For what I've seen it seems like a resource dictionary has some invalid key
value, but i cant say my knowledge about the pdf format is enough as to make me
feel confortable on the subject... so, please correct me if im wrong, but my
guess is that what may be causing the problem is the font description (which
says its using Adobe Standard Latin characters set...) (the only font
description property set to true for what i could see in the objecst explorer,
and your image dump).
Would you say im in the right track, any ideas on how could i solve this? Maybe
change the default font used for the process?
Thanks in advance,
J.
PS: The certificate's cn field has characters like 'a' with backward accent
etc... this, of course, can't be changed.
On Wed, Nov 5, 2008 at 9:27 PM, Leonard Rosenthol <[EMAIL
PROTECTED]<mailto:[EMAIL PROTECTED]>> wrote:
You are running into the updated PDF syntax validator in Acrobat/Reader 9.
Enclosed is a detailed dumpfrom Preflight 9...
Leonard
On Nov 5, 2008, at 4:43 AM, Shadow Man wrote:
Hello,
I recently used itextsharp to build an application that signs pdf documents
using timestamps on the signature.
The problem i have is that using Acrobat 8, the signatures are validated
correctly, however i recently discovered that with Acrobat Reader v9 (probably
with Professional too, i havent tried it) signatures applied show as non
verifiable cus of errors during validation. The error i get with Adobe 9 is:
4000: Unrecognized PDF content: The document contains PDF content or custom
content not supported by the current version of Adobe Reader.
Im attaching sample pdf files to see if anyone has an idea of what could be
causing the problem. Im interested in knowing if this is a flaw on the library
itself, or its due to something im doing wrong. If so, how could i correct this
problem.
Thanks beforehand,
J.
PS: About the sample files: they are both sigend with the same test
certificate, time stamps are different thou.
<unsigned.pdf><signed.itextsharp.pdf><signed.acrobat.8.pdf>-------------
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