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Re: [widgets] Questions regarding to "Test Suite for the XML Digital Signatures For Widgets Specification "

From: Arthur Barstow <art.barstow@nokia.com>
Date: Tue, 01 Feb 2011 07:41:18 -0500
Message-ID: <4D47FF6E.4010900@nokia.com>
To: ext Marcos Caceres <marcosc@opera.com>
CC: ext Andrey Nazarov <Andrey.Nazarov@oracle.com>, public-webapps <public-webapps@w3.org>
Hi Marcos,

On Jan/31/2011 2:18 PM, ext Marcos Caceres wrote:
>
> On 1/31/11 7:52 PM, Arthur Barstow wrote:
>> Andrey - on January 26, Marcos proposed changing the c14n algorithm in
>> [1] and [2] and notified the group in [3] that he updated the Editor's
>> Draft [ED] to reflect his proposal. He included rationale in [1].
>>
>> Marcos - in what way(s) does your proposal break the signer and
>> validator conformance classes as defined in the June 2010 CR [CR]?
>
> It would remove all references and dependencies on XML 
> Canonicalization 1.1 in favor of XML Canonicalization 1.0. Explicit 
> <tranform> to Canonicalization 1.1 would no longer be needed (XML Dig 
> Sig just defaults to 1.0). Everything else stays the same.

If an "old" widget is signed according to [CR] i.e. uses the ExC14N 
algorithm and a "new" validator is implemented according to the proposed 
changes (now reflected in [ED), then what happens when this new 
validator process this old widget? Based on what you and I just 
discussed in IRC, I believe the validation will fail. Correct?

It would be useful if we had at least a general idea regarding the 
number of widgets "in the wild" that are signed using the ExC14N 
algorithm. If anyone has relevant data, please send it to this mail list.

-Art Barstow

>> [1] 
>> http://lists.w3.org/Archives/Public/public-webapps/2011JanMar/0247.html
>> [2] 
>> http://lists.w3.org/Archives/Public/public-webapps/2011JanMar/0250.html
>> [3] 
>> http://lists.w3.org/Archives/Public/public-webapps/2011JanMar/0254.html
>> [ED] http://dev.w3.org/2006/waf/widgets-digsig/
>> [CR] http://www.w3.org/TR/2010/CR-widgets-digsig-20100624/#conformance
Received on Tuesday, 1 February 2011 12:42:12 GMT

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