Date: Tue, 16 Apr 2019 08:56:29 -0700 (PDT) From: "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net> To: cem@freebsd.org Cc: Warner Losh <imp@bsdimp.com>, src-committers <src-committers@freebsd.org>, svn-src-all <svn-src-all@freebsd.org>, svn-src-head <svn-src-head@freebsd.org> Subject: Re: svn commit: r346250 - in head: share/man/man4 share/man/man9 sys/dev/random sys/kern sys/libkern sys/sys Message-ID: <201904161556.x3GFuTvO095471@gndrsh.dnsmgr.net> In-Reply-To: <CAG6CVpW_Tjz_mPmMPForKAO3gLhES63TtdNyZcg0pTkb3z%2BTRw@mail.gmail.com>
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[ Charset UTF-8 unsupported, converting... ] > Hi Warner, > > On Tue, Apr 16, 2019 at 8:47 AM Warner Losh <imp@bsdimp.com> wrote: > > On Tue, Apr 16, 2019 at 9:16 AM Ian Lepore <ian@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. Thank you Conrad, I'll bow out of any discussion now, you clearly have the same concern I do. > Best, > Conrad -- Rod Grimes rgrimes@freebsd.org
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