Bug 129127

Summary:	JWK export should be padded to 8*n bytes
Product:	WebKit	Reporter:	Alexey Proskuryakov <ap>
Component:	WebCore Misc.	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED WONTFIX
Severity:	Normal	CC:	bfulgham, jiewen_tan, rob, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	528+ (Nightly build)
Hardware:	Unspecified
OS:	Unspecified
Bug Depends on:
Bug Blocks:	160883

Description Alexey Proskuryakov 2014-02-20 16:07:17 PST

As AES-KW can only wrap keys that are 8*n bytes bytes long, wrapping a CryptoKey in JWK format is only possible when the exported key happens to be of that size.

See <https://www.w3.org/Bugs/Public/show_bug.cgi?id=24457>. We should probably wait to see if a particular form of padding gets prescribed.

When done, we should re-add a subtest to crypto/subtle/aes-kw-wrap-unwrap-aes.html that was removed in <http://trac.webkit.org/r163244>.

Comment 1 Radar WebKit Bug Importer 2016-08-15 17:59:19 PDT

<rdar://problem/27858069>

Comment 2 Jiewen Tan 2016-11-07 18:30:57 PST

Per discussion of the W3C thread and the most updated spec:
https://www.w3.org/TR/WebCryptoAPI/#aes-kw-operations, and Editor's draft:
https://w3c.github.io/webcrypto/Overview.html#aes-kw-operations.

This padding restriction becomes a check on the wrapKey operation of AES-KW. Therefore, this bug is obsolete.