Date: Fri, 24 Jul 2015 09:25:20 -0600 From: Ian Lepore <ian@freebsd.org> To: Mark R V Murray <markm@FreeBSD.org> Cc: John-Mark Gurney <jmg@funkthat.com>, src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r284959 - in head: . share/man/man4 share/man/man9 sys/conf sys/dev/glxsb sys/dev/hifn sys/dev/random sys/dev/rndtest sys/dev/safe sys/dev/syscons sys/dev/ubsec sys/dev/virtio/random sy... Message-ID: <1437751520.1334.546.camel@freebsd.org> In-Reply-To: <BC734D25-375C-4C1C-BA8A-BD91158B6A39@FreeBSD.org> References: <201506301700.t5UH0jPq001498@svn.freebsd.org> <alpine.BSF.2.20.1507221138360.1071@desktop> <FFAED695-145A-45F5-988D-B843EF5F544B@FreeBSD.org> <alpine.BSF.2.20.1507221249120.1071@desktop> <FFFB06D7-164B-40B3-AFC3-A6630BCF074E@bsdimp.com> <E20B169F-4C8A-4D11-9853-5C2EFC116450@FreeBSD.org> <F54A96A8-D9AD-409A-814F-538B6AD3CD50@yahoo.com> <20150724012519.GE78154@funkthat.com> <BC734D25-375C-4C1C-BA8A-BD91158B6A39@FreeBSD.org>
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On Fri, 2015-07-24 at 07:59 +0100, Mark R V Murray wrote: > > On 24 Jul 2015, at 02:25, John-Mark Gurney <jmg@funkthat.com> wrote: > > > > I would like to point out that the goal of collecting large amounts > > is starting to fall out of favor, and I happen to agree with the likes > > of djb[1] that we don't need an infinite amount of entropy collected by > > the system. If the attacker can read out our RNG state, then we are > > already screwed due to many other vulns. > > I’m working on a premise of “tools, not policy”. I’d like there to be > enough harvesting points for the box owner to get the warm fuzzies. > If they choose to use less, fine by me. > > > Many of the issues that FreeBSD sees with lack of entropy at start up > > is more of a problem on how systems are installed and provisioned. I > > don't believe that we currently store any entropy from the install > > process, yet this is one of the best places to get it, the user is > > banging on keyboard selecting options, etc. If an image is designed > > to be cloned (vm images or appliance images) we need to have a > > mechanism to ensure that before we start, we get the entropy from > > other sources, be it a hardware RNG or the console. > > Getting an initial entropy bundle for first boot is high up on my > TODO list. :-) Patches welcome! We need the usual /entropy (or > /var/db/entropy/… or whatever) and crucially we need /boot/entropy > and the correct invocation in /boot/loader.conf. > But keep in mind that loader(8) is optional and not used at all on some non-x86 systems. -- Ian
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