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

On 6/8/2012 9:15 PM, Eric Rescorla wrote:
> 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.

+1

We're working with hardware right now that supports ECB & CBC but no 
CTR, for example.

Mitch

>
> -Ekr
>

Received on Saturday, 9 June 2012 21:06:52 UTC