Jose, thanks for your answer, but I've tried the <CTRL + F> before making
the question, and haven't found anything.

If I simply make a search of the words "IExternal" I can find
"iTExtSharp.text.pdf.security.IExternalSignature" only, and if I try to
find something containing the words "ExternalDigest", the only thing I've
found is the method
"iTextSharp.text.pdf.security.PdfPKCS7.SetExternalDigest". And that's why
I'm asking.



2012/10/23 José Santiago Bonilla Pazmiño <[email protected]>

> HI, itextsharp uses the same nomenclature that C#, so: ExternalDigest is
> an Interface and interface names start with "I". You should use
> IExternalDigest and create your own, or use an existing one.
>
> A simple CTRL+F: "ExternalDigest" would have solved your problem.
>
> Regards,
>
> Jose
>
> El martes, 23 de octubre de 2012, Hyuga escribió:
>
> Hello everybody!
>>
>> I am trying to use iTextSharp to sign digitally a PDF previously created.
>> I've upgraded my iTextSharp.dll version to 5.3.3.0 (I was previously using
>> an elder version just for creating the PDFs), I have found the White Paper
>> about Digital Signatures written by Mr. Lowagie and, of course, I've tried
>> to apply what I've read there (written in Java) to what Im doing in
>> VB.NET.
>>
>> But I'm doing something wrong, or I'm missing something, because the
>> classes and their methods doesn't seem to be the same, and I'm not being
>> able to find them in my downloaded dll.
>>
>> For example, the PdfStamper Class doesn't have a getSignatureAppearance()
>> method, but I found the SignatureAppearance() one, which I think it does
>> the same, so no problem. The PdfSignatureAppearance doesn't have the
>> setReason or setLocation mtehods, but this is not my main problem.
>> My first problem is when I try to get and ExternalDigest. In fact, I
>> can't find neither the ExternalDigest class nor an equivalence in my dll
>> version. And, if I can solve that, the signDetached method signature is not
>> the same in Java than in VB.NET.
>>
>> After all this context (sorry if it's lengthly), my question is: can I
>> use the concepts in the White Paper about Digital Signatures with
>> iTextSharp version 5.3.3.0, or I have to downgrade my dll to try a previous
>> approach to digitally sign my pdfs? If i can use the same concepts, where
>> can I find the ExternaDigest class?
>>
>> Thanks a lot!
>>
>
>
> --
> Saludos cordiales,
>
>
> José Bonilla
> (+593) 95031497
>
>
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