First a reply in english, spanish is following.
Primero en inglés, y en castellano más abajo.
On 05/02/2009, Alexis Pigeon <[email protected]> wrote:
>
> And here is the translation... Please remember that I'm no specialist in
> digital signatures, so I might misunderstand some concepts here, thus some
> possible glitches in the translation... I'll but any comment of mine between
> squared brackets.
>
> On 05/02/2009, Juan Francisco Martínez Chinchilla <[email protected]>
> wrote:
>>
>> Muchas gracias, mi ingles es demasiado malo.Mi problema es el siguiente:
>> Uso la ultima version de itextsharp para firma digitalmente la
>> documentacion hasta aqui es correcto todo el proceso, el problema viene
>> cuando añadimos una firma con nivel de certificacion, sino añadimos unos
>> sellos (imagenes de VISADO) con la ultima firma, las demas firmas en adobe
>> 9.0 aparecen como NO VALIDAS mientras que con sus versiones anteriores
>> (adobe 8.0 o inferior) aparecen correctamente. Sin embargo sino añadimos los
>> sellos todas las firmas aparecen correctamente en adobe 9.0.
>>
>
> We (referring to the OP) use the latest version of iTextSharp in order to
> sign documents.
> The problem is that when we add a signature with some level of
> certification [translator : not sure about that one]. If we don't add images
> [translator : from the context, I guess the OP means "If we DO add images"]
> with the last signature, the other signatures appear as NOT VALID in adobe
> 9.0 while appearing correctly in previous versions (adobe 8.0 and lower).
> However, if we don't add images [translator : in that case, I guess the OP
> really meant so] all signatures appear correctly in adobe 9.0
>
[ENGLISH]
I'll just repeat myself here. I'm no digital signature specialist, but I
understand that a signature shouldn't be valid over a document that's been
modified by adding an image *after* the signature was added, but that adding
a signature isn't considered as a modification, thus keeping the validity of
the previous signature(s).
For further inspection, it would be quite practical if you could send :
- the original signed document
- the modified document (signature only)
- the modified document (signature + image)
- a short standalone piece of code that helps us produce the 2 modified
documents.
HTH,
alexis
[SPANISH]
Voy a repetir lo que te comente. No soy ningun experto en firmas digitales,
pero entiendo que una firma tiene que ser invalida si el documento ha sido
modificado añadiendole una imagen *despues* de haber fimado el documento,
pero que solo añadir una firma no se considera como una modificacion, por lo
cual las firmas anteriores no aparecen invalidas.
Para que podamos ayudarte, nos vendría muy práctico que envies a esta lista:
- el documento original
- el documento modificado (firma solo)
- el documento modificado (firma + imagen)
- un pequeño trozo de código que nos permita producir estos 2 documentos
modificados.
Saludos,
alexis
------------------------------------------------------------------------------
Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM)
software. With Adobe AIR, Ajax developers can use existing skills and code to
build responsive, highly engaging applications that combine the power of local
resources and data with the reach of the web. Download the Adobe AIR SDK and
Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com
_______________________________________________
iText-questions mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/itext-questions
Buy the iText book: http://www.1t3xt.com/docs/book.php
