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Re: [W3C Web Crypto WG] Deciding if we need a discovery mechanism

From: Eric Rescorla <ekr@rtfm.com>
Date: Fri, 8 Jun 2012 21:15:28 -0700
Message-ID: <CABcZeBMcpb-ePMHoUOm-v9pw84_C9MTFRHPRRWiVSkPMNJkj=A@mail.gmail.com>
To: Wan-Teh Chang <wtc@google.com>
Cc: David Dahl <ddahl@mozilla.com>, Mitch Zollinger <mzollinger@netflix.com>, public-webcrypto@w3.org
On Fri, Jun 8, 2012 at 5:48 PM, Wan-Teh Chang <wtc@google.com> wrote:
> On Thu, Jun 7, 2012 at 8:26 PM, David Dahl <ddahl@mozilla.com> wrote:
>>
>> I think so. We do need to figure out just how flexible this mechanism should be. Perhaps the key handle object you get back has properties like:
>>
>> kh.mode
>> kh.padding
>> kh.algorithm
>
> An AES key can be used in different modes of operation and with
> different padding schemes, so 'mode' and 'padding' aren't properties
> of a key unless we artificially constrain the key.

It seems like they might be if the key was embedded in a piece of
hardware which had a limited mode set, e.g, one which supported
only CBC and not GCM.

-Ekr
Received on Saturday, 9 June 2012 04:16:37 GMT

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