Hi Warner,

On Tue, Apr 16, 2019 at 8:47 AM Warner Losh <i...@bsdimp.com> wrote:
> On Tue, Apr 16, 2019 at 9:16 AM Ian Lepore <i...@freebsd.org> wrote:
>> Isn't a file full of data which is distributed in identical form to
>> everyone the exact opposite of entropy?

Ian has the right idea.

> It's just to bootstrap entropy for installs. The CI stuff doesn't matter if 
> that's the same since the CI images aren't exposed to the internet in any way 
> that would make it matter. The normal install would have the same seeds of 
> entropy, but diverge from there fairly quickly. The stuff that's used early 
> in the install is the don't care sort of things that won't matter in the 
> installer (which then creates it's own entropy that's different for every 
> install).

I agree that it would be safe, although potentially misleading and
potentially dangerous, to create a fake entropy file for the installer
images.  We need to be careful *not* to embed such files in .img files
which are installed by 'dd' directly to a disk or flash or VM, for
example.  It would be catastrophic to distribute the same entropy file
to all FreeBSD AWS images.

Best,
Conrad


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