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AW: [iaik-jce] How to put/get file type information in PKCS7?


you may wrap the file to be signed into a MIME object before passing it to
the SignedData object, or (may be more appropriate) you immediately may use
You also may include the information you want as attribute in the SignerInfo
structure. However, in this case you would have to use a private attribute
type which may not be recognized.

Dieter Bratko

-----Ursprüngliche Nachricht-----
Von: iaik-jce-owner@iaik.tu-graz.ac.at
[mailto:iaik-jce-owner@iaik.tu-graz.ac.at]Im Auftrag von Diego
Gesendet: Montag, 22. Januar 2001 17:49
An: Iaik-Jce (E-mail)
Betreff: [iaik-jce] How to put/get file type information in PKCS7?

I have the following problem:
I want to sign a file and obtain a PKCS7 signedData Object but, as far as I
know ,there is no content type information in the PKCS7 standard (Or
better,there is, but related to the cryptographic operation involved,
How do I,for example, store the information that the file is not ASCII, but,
say, a pdf file?
This is useful to recognize the application whose purpose is to handle THAT
file (e.g: Acrobat Reader).

In other words:
is there, with respect to COMPATIBILITY, a way to store/get the MIME type of
the content?

P.S=When I say COMPATIBILITY, I mean that any other could verify/exctract
the content AND be able to handle it!

ANY help appreciated,

Best Regards,
         Diego Pietralunga
         Laboratorio di Telematica per il Territorio - Parma
         E-Mail: Diego@ltt.it

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