Bug 170446 – Exception when trying to get self.crypto.webkitSubtle in WebWorker

• Status: RESOLVED
• Resolution: WONTFIX
• Component: New Bugs

[Yury Strozhevsky]

I am trying to use WebCrypto API inside WebWorker. When I try to even just get value of "self.crypto.webkitSubtle" I got error "Operation is not supported". When I get value of "self.crypto.subtle" everithing is fine. I do know that "webkitSubtle" is deprecated, but I do expect to have just a warning here, not an expection.

[Alexey Proskuryakov]

self.crypto.webkitSubtle wasn't supported in workers in the past, so this is not a regression. Please use non-deprecated API.

[Yury Strozhevsky]

Alexey, seems you misunderstand the issue. I have an exception during getting a value of existing property for "self.crypto". It is not during using the webkitSubtle, but just while getting value. 

So, even if it "wasn't supported in the past" this is a bug. No it is a BUG - you have a property of standard system object but no one could even read the property value without exception.

In fact I do not have old Safari for testing, but I had Safari working with this code inside WebWroker (it is from PKI.js library, https://github.com/PeculiarVentures/PKI.js/blob/master/src/common.js#L46):
if("webkitSubtle" in self.crypto)
{
	subtleObject = self.crypto.webkitSubtle;
	engineName = "safari";
}

So, please fix the bug - it is a real bug. And I do believe it is easy to fix.

[Alexey Proskuryakov]

Getters are allowed to raise exceptions, and often do. This is expected behavior for crypto.webkitSubtle.

[Jiewen Tan]

(In reply to Yury Strozhevsky from comment #0)
> I am trying to use WebCrypto API inside WebWorker. When I try to even just
> get value of "self.crypto.webkitSubtle" I got error "Operation is not
> supported". When I get value of "self.crypto.subtle" everithing is fine. I
> do know that "webkitSubtle" is deprecated, but I do expect to have just a
> warning here, not an expection.

Please use our new api self.crypto.subtle for any future development. Thanks.

[Yury Strozhevsky]

I made a comment in this bug: https://bugs.webkit.org/show_bug.cgi?id=165913
Hope someone really solved the bug would ask there and clarify situation.