Key wrap/unwrap/import/export open issue

All,

As discussed on a recent call, the key wrap/unwrap support in the latest
Working Draft differs from the original proposal (
http://www.w3.org/2012/webcrypto/wiki/KeyWrap_Proposal) in two important
ways. First in leaving key wrap format to the JS code and second in not
defining and mapping JWK attributes for the WebCrypto Key attributes
(extractable and usages).

The first point is a clear improvement over the original proposal (IMO).

This second point means we do not have support for unwrapping
non-extractable keys (and maintaining that property) in the core draft*.
This is properly addressed in the import/export sections. which remain
empty (no changes to the wrap/unwrap text are necessary).

The group previously agreed that the original proposal should be included
in the draft. I've described the issue in more detail and extracted the
relevant parts of the original proposal here:
http://www.w3.org/2012/webcrypto/wiki/KeyWrap_Notes_July

...Mark

* i.e. without appealing to special behaviours attached to pre-provisioned
keys out-of-band.