Hi Paulo

Thanks a lot for the tip. I tried it but it didn't change the behavior 
even when using the BouncyCastle 1.49. verify() still returns false.

Regards
Stephan

On 04.07.2013 19:17, Paulo Soares wrote:
> Make sure that you are using BouncyCastle 1.49. There was a problem
> with 1.48 with some certificates.
>
> Paulo
>
> On Thu, Jul 4, 2013 at 5:40 PM, Stephan Wagner (calac)
> <stephan.wag...@calac.net> wrote:
>> Hi, first of all I'm not what one calls a digital signature expert but I'm
>> wondering if somebody might have a solution for the problem I ran into.
>>
>> Problem description:
>>
>> If I try to verify a digitally signed PDF with iText (5.4.2) verify() always
>> returns false (wrong result)
>> If I try to verify the same PDF with iTextSharp (5.4.2) Verify() returns
>> true (expected result)
>> The digital signature is also valid in Acrobat Reader (Xi) (expected result)
>>
>> When I copy the file and tamper it, iTextSharp Verify() returns false
>> (expected result), just to make sure it doesn't return true all the time.
>>
>> I already tried different versions back to 5.3.0, and wasn't able to get the
>> PDF verified from Java.
>>
>> I tried to attach a sample file, but don't know if it worked...
>>
>> Thanks a lot
>> Stephan
>>
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> Please check the keywords list before you ask for examples: 
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