Re: KVM, Entropy and Windows

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On Thu, 2011-02-17 at 12:37 +0200, Dor Laor wrote:
> On 02/17/2011 12:09 PM, Vadim Rozenfeld wrote:
> > On Thu, 2011-02-17 at 11:11 +0200, Avi Kivity wrote:
> >> On 02/16/2011 09:54 PM, --[ UxBoD ]-- wrote:
> >>> Hello all,
> >>>
> >>> I believe I am hitting a problem on one of our Windows 2003 KVM guests were I believe it is running out of Entropy and causing SSL issues.
> >>>
> >>> I see that there is a module called virtio-rng which I believe passes the HW entropy source through to the guest but does this work on Windows as-well ?
> >>>
> >>
> >> AFAIK there is no Windows driver for virtio-rng.  Seems like a good
> >> idea.  Vadim?
> > virtio-rng driver for windows is not a big deal. IMO, the real problem
> > will be to force Windows to use for CriptoApi.
> 
> What's the implication of it? good or bad?
iirc, Vista and higher use a new generation of cryptography API. 
CriptoApi can be integrated with smart cards sub-system. If we 
can make Windows virtio-rng driver to be attachable to smart cart
devstack, I think we can solve the problem.

> Do you know what hyper-v is doing for it?
> 
No idea.
> >>
> >>> If it doesn't any ideas on how I can increase the amount of entropy being generated on a headless system ? or even monitor entropy on a Windows system ?
> >>
> >> No idea.  Maybe you could ask Windows to collect entropy from packet
> >> timings.
> >>
> >
> >
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