[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Jeffrey Hutzelman] LAST CALL - Public Key Cryptography for Initial Authentication in Kerberos



Peter,

> Tagging is a matter of ket's say "taste", in fact, it is a matter of
> implementation
> experience. ASN.1 after many years has come with AUTOMATIC tags
> allowing automatically unambiguous and non-excessive explicit tagging.

The excessive amount of tagging seems like minor nit, its bloaty, sure, its
like rest of the Kerberos protocol.

> Wrapping: Strong boundaries would make sense if you don't have to
> cross them
>
> Interoperability note: Some implementations may not be able to decode
>    wrapped CMS objects encoded with BER but not DER; specifically, they
>    may not be able to decode infinite length encodings. 
>
>
>
> something that seems to be necessary according to the previous citation.
>
> As soon as you have the data structure that you wrap,
> you can also encode them in DER. I doubt that you just have the
> octet string contents only available as blobs.

The CMS implemtetion might use another asn1-package then then Kerberos
implemetation, I think today that this is the common case. You call CMS
package, get back blob, and you have no clue about the encoding it used
used.

Love

Attachment: pgpLfJHH0GIb5.pgp
Description: PGP signature