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RE: AW: signature portability / C14N / inherited namespaces

From: Gregor Karlinger <gregor.karlinger@iaik.at>
Date: Thu, 31 May 2001 09:21:24 +0200
To: "merlin" <merlin@baltimore.ie>, "Gregor Karlinger" <gregor.karlinger@iaik.at>
Cc: <w3c-ietf-xmldsig@w3.org>
Message-ID: <LBEPJAONIMDADHFHAEAOGECNCGAA.gregor.karlinger@iaik.at>

> Hi Gregor,
> r/gregor.karlinger@iaik.at/2001.05.24/14:08:19
> >  I have not thought a lot about the consequences of the following idea,
> >  but anyway: Should we add an additional rule both to the processing
> >  rules for signature generation and validation, that the SignedInfo
> >  element should be isolated from its context prior to computing
> >  the canonicalized representation?
> Unfortunately we can't isolate SignedInfo. An XPath/XSLT Transform
> can legitimately rely on inherited namespaces. I have a queued
> followup to my earlier question on this topic, I just need to
> finish it.
> Merlin

Yes, some transforms could rely on inherited namespaces. But if we change
the processing model slightly, we can cope with this problem: Simply
state that all namespaces that are used in a transform MUST be declared
in the Transform element.

Liebe Gruesse/Regards, 
DI Gregor Karlinger
Phone +43 316 873 5541
Institute for Applied Information Processing and Communications

Received on Thursday, 31 May 2001 03:22:21 UTC

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