Comments on: Sign a PDF document

By: Soukaina IDRISSI

Soukaina IDRISSI — Mon, 29 Jul 2019 12:19:27 +0000

Hi rberthou,
Thank you for this post. It’s very interesting.
But in my case, im using USB token, and i sign a document in different way, by calling a ‘C_SignUpdate’ function in PKCS11JS library like this: pkcs11.C_SignUpdate.

So, how can i implement your solution without using .p12 file ?

Thank you in advance for help.

By: naval kumar gupta

naval kumar gupta — Thu, 22 Nov 2012 07:44:45 +0000

Thanks For this Code, But I have one issue My Pdf have more Than One pages and i want to sign on every pages then how can i modified Your code i have tried from lot of changes but not successful please reply me.

By: naval

naval — Wed, 17 Oct 2012 07:28:09 +0000

Its very Good code in the 2 min i have implemented but i m getting problem is . it showing signature but showing Message with “Validity Unknow” But i want to Show IBM

By: lamia

lamia — Tue, 22 May 2012 10:50:03 +0000

HI
no problem my program work successfully , cause i find (bctsp.jar) how cause me pb
so thanks again,

By: lamia

lamia — Sun, 20 May 2012 09:33:19 +0000

hi
thanks about this a very good explanation ,but i have a problem , when i excecute my program a big exception occur and my pdfs file is impty or clearly the acrobat reader can’t read it (error of decrypt…), my exception is
———————————————————————->
” Exception in thread “main” java.lang.NoClassDefFoundError: org/bouncycastle/tsp/TimeStampTokenInfo
at com.itextpdf.text.pdf.PdfSignatureAppearance.getAppearance(PdfSignatureAppearance.java:409)
at com.itextpdf.text.pdf.PdfSignatureAppearance.preClose(PdfSignatureAppearance.java:951)
at com.itextpdf.text.pdf.PdfSignatureAppearance.preClose(PdfSignatureAppearance.java:897)
at com.itextpdf.text.pdf.PdfStamper.close(PdfStamper.java:194)
at test4.test4.test4(test4.java:130)
at test4.test4.main(test4.java:30)
Caused by: java.lang.ClassNotFoundException: org.bouncycastle.tsp.TimeStampTokenInfo
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
… 6 more
”

please help me ,it’s so impotent

thanks ,

By: lamia

lamia — Sun, 20 May 2012 09:28:54 +0000

hi
thanks about this a very good explanation ,but i have a problem , when i excecute my program a big exception ocure and my pdfs file is impty or clearly the acrobat reader can’t read it (error of decrypt…)

By: John Ross

John Ross — Wed, 09 Dec 2009 20:32:01 +0000

We had a similar project requiring us to sign PDF documents and print them. We tried Itext and were able to use the sample above . But unfortunately, it didn’t work for all PDF documents and didn’t support multiple signatures. We were sometime getting invalid signatures when opening the documents in different versions of Adobe Acrobat. So at the end we decided to purchase a commercial library (j100% java) called jPDFProcess. The same company also offers jPDFSecure, a cheaper library to secure and sign PDF documents. But because we needed to print the documents after signing, we ended up getting jPDFProcess.

By: rberthou

rberthou — Wed, 07 Oct 2009 18:36:01 +0000

Bruskvilla :
You can create a “self signed” certificate (for tests or internal use)
http://www.flatmtn.com/article/creating-pkcs12-certificates

or you buy a personal certificate (http://www.verisign.com)
and other site.

By: bruskvilla

bruskvilla — Tue, 06 Oct 2009 12:17:26 +0000

Hello that’s so useful thank you very much, I’m new about that topic,where i can find the ‘fileKey’ which was given with .p12 extension? Can anybody explain the code what it’s doing please? thanks again.

By: rberthou

rberthou — Thu, 24 Sep 2009 20:51:30 +0000

Yes of course, with a little modification of this sample code