mkl wrote:
> Stephen,
>
>
> Stephen Byrne wrote:
>> mkl wrote:
>>> Indeed Acrobat and Reader have more requirements concerning the validity
>>> of
>>> signatures than the mere matching of the hash value. They also allow only
>>> a
>>> very limitted set of additions to the file after signing. Thes
Stephen,
Stephen Byrne wrote:
>
> mkl wrote:
>> Indeed Acrobat and Reader have more requirements concerning the validity
>> of
>> signatures than the mere matching of the hash value. They also allow only
>> a
>> very limitted set of additions to the file after signing. These
>> requirements
>>
mkl wrote:
> Stephen,
>
> Stephen Byrne wrote:
>> I am using iText to sign a document, save it to a file, read that file,
>> add another signature, and save it to a second file. If I read my output
>> files and verify the signatures with iText, they both verify. If I open
>> the once-signed with A
Stephen,
Stephen Byrne wrote:
>
> I am using iText to sign a document, save it to a file, read that file,
> add another signature, and save it to a second file. If I read my output
> files and verify the signatures with iText, they both verify. If I open
> the once-signed with Adobe Acrobat, it
@lists.sourceforge.net
Subject: [iText-questions] Multiple signatures and verification by Acrobat
I am using iText to sign a document, save it to a file, read that file,
add another signature, and save it to a second file. If I read my output
files and verify the signatures with iText, they both
I am using iText to sign a document, save it to a file, read that file,
add another signature, and save it to a second file. If I read my output
files and verify the signatures with iText, they both verify. If I open
the once-signed with Adobe Acrobat, it shows the signature as valid. I
expected th
I've found a solution thanx to Michael. In the post of the
here
http://old.nabble.com/Problem-with-PdfReader.eliminateSharedStreams%28%29-in-concert-with-appending-PdfStamper-to26734822.html
He says that if he works with RandomAccessFileOrArray then everything goes
OK.
Hence, I did this change
alexrait,
alexrait wrote:
> Is there any way to manually fix the pdf, like reading it as a text file,
> finding and replacing the incorrect content?
You can fix it quite easily by replacing the false references in the
/Contents array by the original ones. Unfortunately this way you invalidate
t
Is there any way to manually fix the pdf, like reading it as a text file,
finding and replacing the incorrect content?
Now, I've noticed that even if I sign first time on the last page with
"append" flag turned on, it won't show the signature
mkl wrote:
>
> alexrait,
>
>
> alexrait wrote:
alexrait,
alexrait wrote:
> Here is the full function that signs.
>
> public static void SignPDF(Stream instream, Stream outstream,
> X509Certificate2 xcer, bool IsVisible,
> string imageLocation, int[] rectangle, int page)
> {
> [...]
> Rect
It happens with any file...
Here is the full function that signs.
public static void SignPDF(Stream instream, Stream outstream,
X509Certificate2 xcer, bool IsVisible,
string imageLocation, int[] rectangle, int page)
{
Org.BouncyCastle.X509.X509Certificate[] chain
alexrait,
alexrait wrote:
> First I create a PdfStamper with the append parameter set to true.
> I use the SetVisibleSignature method with the page parameter set to "1".
> It works as expected if I sign the document once or more.
>
> Setting the page to "2" or any other page shows the signature
First I create a PdfStamper with the append parameter set to true.
I use the SetVisibleSignature method with the page parameter set to "1".
It works as expected if I sign the document once or more.
Setting the page to "2" or any other page shows the signature at the
signatures tab on the left, bu
Of course. This is a common workflow.
-Original Message-
From: mtrekker [mailto:mtrek...@hot.ee]
Sent: Thursday, December 10, 2009 2:08 AM
To: itext-questions@lists.sourceforge.net
Subject: [iText-questions] Multiple signatures
Coming back to the old subject I couldn't get my a
mtrekker wrote:
> Coming back to the old subject I couldn't get my answer from search
> results...
>
> Per PDF standard, each signature is revision when working in append mode.
> How to solve the following reallife example:
>
> 1) user signs PDF and sends it to governement authority to complete
>
Coming back to the old subject I couldn't get my answer from search
results...
Per PDF standard, each signature is revision when working in append mode.
How to solve the following reallife example:
1) user signs PDF and sends it to governement authority to complete
acceptance
2) authority then n
onard
-Original Message-
From: Glam [mailto:gl...@abv.bg]
Sent: Tuesday, December 01, 2009 1:36 AM
To: itext-questions@lists.sourceforge.net
Subject: [iText-questions] Multiple signatures and multiple revisions
Hi,
I've read the following thread
http://old.nabble.com/Re:-multiple-signatures
Glam,
Glam wrote:
>
> is it possible (according to the PDF standard, and in iText) to have two
> signatures for the same revision?
just one afterthought... if you seriously want to be in the signature
business, you should not only keep in mind the current plain PDF standard
(i.e. ISO-32000-1:
Glam,
Glam wrote:
>
> is it possible (according to the PDF standard, and in iText) to have two
> signatures for the same revision? (I have set a certification level to
> CERTIFIED_FORM_FILLING_AND_ANNOTATIONS).
> The point is that the document is created once and is not altered at all,
> except
Hi,
I've read the following thread
http://old.nabble.com/Re:-multiple-signatures-td3725560.html , but there is
something more I'd like to ask.
It is obvious, that if the document has 2 revisions, the first signature
doesn't cover the second revision. However, is it possible (according to the
PDF
Usman Shaik wrote:
> Once i open the PDF document using PdfStamper then loop thru the Acro
> Fields to update the content its removing the previous signatures.
The only thing I can think of, is bad naming of the signatures.
Otherwise I'm at a loss.
--
This answer is provided by 1T3XT BVBA
http:/
Hi,
For signatures we are using SAPI (Cosign). the PDF can accept multiple
signatures.
Once i open the PDF document using PdfStamper then loop thru the Acro Fields to
update the content its removing the previous signatures.
Please help.
i have used PdfStamper with append mode.
This is what
Juan Manuel Diaz wrote:
> Dear Bruno, i was trying your library (iText) in a software application
> which will be using the government of the province of Buenos Aires, and
> i think that is a great tool, congratulations!!!
Thanks!
> I can create pdf documents in an easy way with your library, b
A blank signature field is a visual placeholder on the document for
where a user could click (in an interactive viewer like Acrobat) to
sign the document. They could also be used as a placeholder for a
location/rect on the page where a signature should go in a non-
interactive signing proc
I guess you need them so you can sign later or
something similar :-)
Well, it doesn´t matter ... thanks for your quick answers :)
Paulo Soares escribió:
I've no idea. Why would I need a blank signature field?
--
Eneko González Benito
Jefe de Proyecto
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Eneko González Benito
> Sent: Thursday, January 24, 2008 2:41 PM
> To: Post all your questions about iText here
> Subject: Re: [iText-questions] Multiple signatures in a sa
> It doesn't matter if the doc has already blank sugnature fields or
not.
Ok, Paulo. So .. what are these fields used for?
--
Eneko González Benito
Ezinbestekoa ez bada, ez imprimatu mezu hau; zaindu ingurumena.
No imprima este e-mail si no es totalmente necesario; respete el Medio
Ambie
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Eneko González Benito
> Sent: Thursday, January 24, 2008 12:52 PM
> To: Post all your questions about iText here
> Subject: Re: [iText-questions] Multiple signatures in a
Hi Paulo,
Paulo Soares escribió:
Each signature is a revision, always. That's how PDFs work.
Ok. So i suppose that you cannot get rid of that warning, can you?
I know someone that says that you must know the number of people who is
going to sign a document so you can leave some blan
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Eneko González Benito
> Sent: Thursday, January 24, 2008 11:46 AM
> To: Post all your questions about iText here
> Subject: [iText-questions] Multiple signatures in a same
Hi all,
I know how to add multiple signatures to a document and when i open it
with Acrobat Reader, i see that there are multiple revisions (1 for
each signature) and a warning that says that each signature signs a
revision, but knows nothing about post-revisions.
Is there a way to have multi
Ok, everything works now.
It looks like a problem of OpenSignPDF... this is what they do:
[CUT]
PdfDictionary signDict = new PdfDictionary();
signDict.put(PdfName.FT, PdfName.SIG);
signDict.put(PdfName.FILTER, new PdfName("Adobe.PPKLite"));
signDict.put(PdfNa
Hello,
i'm trying to place multiple signatures on a PDF file (i need 4 signatures).
I tried modifying OpenSignPDF but when i add more than two signatures i
always get that only the first and the last one are valid while all the
signatures among the two show a red X on them.
For instance... lets sa
...
> * Within the appended-revision section, there is a dictionary object
> (66 0) with /Type/catalog
> What is it for ? It is a dangling (not referenced) object.
bug fixed :)
...
> I'd like to know more about difficulties and limits of your
> experiment, so please aswer to my last question:
...
> * Within the appended-revision section, there is a dictionary object
> (66 0) with /Type/catalog
> What is it for ? It is a dangling (not referenced) object.
bug fixed :):)
...
> I'd like to know more about difficulties and limits of your
> experiment, so please aswer to my last questio
Great job Antonio!
It is a really promising experiment.
I can confirm that your resulting document is correct.
Althoug I'm not an expert of pdf-core internals, I noted some strange
things within your generated-pdf [3]:
* Within the appended-revision section, there is a dictionary object
(66 0)
Hello,
about this post [1] I would want to contribute to the solution of the problem.
I have taken this signed pdf [2], removed the second signature and added mine
with iText and the result it seems corrected [3].
Soon I will clean up my code and I will send the patch.
Bye
--
Antonio
http://w
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of [EMAIL PROTECTED]
> Sent: Friday, October 27, 2006 1:32 PM
> To: itext-questions@lists.sourceforge.net
> Subject: [iText-questions] Multiple signatures - why don't
It's more than one week I'm thinking about multiple signatures.
Bruno Lowagie demonstrated in an ample tutorial
[http://itext.ugent.be/articles/eid-pdf/index.php]
how to add signatures :
"approval" signatures and "certification" signatures.
Unfortunately, that tutorial ended showing the inab
Hi,
To a fresh PDF document, I add a digital signature. This signature
covers this revision (say, revision 1) completely.
I send it to a customer, who adds her own digital signature. This
creates a new revision, revision 2, that is completely covered by her
signature.
Is there an easy way to find
Multiple signatures will be supported next month.
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Robert Esterer
> Sent: Monday, November 22, 2004 5:33 PM
> To: [EMAIL PROTECTED]
> Subject: [iText-questions] Multiple
Hello,
I noticed that exisiting signatures in a PDF become invalid after signing it
with iText. My guess is that it's because iText removes the old revisions
that were signed before. Is there a workaround for this? I didn't find a
fitting method in the API so far.
Best Regards,
Robert Esterer
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