[Webkit-unassigned] [Bug 183167] Cannot store CryptoKey to IndexedDB in ServiceWorker

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=183167

Joseph Liccini <joliccin at microsoft.com> changed:

           What    |Removed                     |Added
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                 CC|                            |joliccin at microsoft.com

--- Comment #6 from Joseph Liccini <joliccin at microsoft.com> ---
I also am running into this issue.

It is not specific to IndexedDB as noted.

It occurs with postMessage as well, so it is indeed related to the structured clone algorithm from within the Service Worker Global Scope context.

I am able to use the structured clone algorithm for CryptoKeys within the Window context, but not within the ServiceWorkerGlobalScope context.

You can get the same exception by trying to `postMessage` to a `Client` object from the service worker the `CryptoKey`.  And you will get the same 'DataClone' error.

But a `postMessage` on the `window` object via `window.navigator.serviceWorker.controller.postMessage` will not throw the exception.  In this case the structured clone succeeds.

I can prepare a Plunkr soon.

I am hypothesizing that a workaround would be for the service worker to only perform `read` operations into IndexedDB for the CryptoKey, and all write operations will have to happen on the Main thread.

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