Date: Tue, 11 Sep 2012 22:27:30 +0100 From: RW <rwmaillists@googlemail.com> To: d@delphij.net Cc: Arthur Mesh <arthurmesh@gmail.com>, Doug Barton <dougb@FreeBSD.org>, freebsd-rc@freebsd.org, freebsd-security@freebsd.org, Dag-Erling =?ISO-8859-1?Q?Sm=F8rgrav?= <des@des.no>, delphij@delphij.net Subject: Re: svn commit: r239569 - head/etc/rc.d Message-ID: <20120911222730.7f92325e@gumby.homeunix.com> In-Reply-To: <504FA511.8050904@delphij.net> References: <50450F2A.10708@FreeBSD.org> <20120903203505.GN1464@x96.org> <50451D6E.30401@FreeBSD.org> <20120903214638.GO1464@x96.org> <50453686.9090100@FreeBSD.org> <20120904220754.GA3643@server.rulingia.com> <20120906174247.GB13179@dragon.NUXI.org> <20120906230157.5307a21f@gumby.homeunix.com> <20120906224703.GD89120@x96.org> <50493480.8060307@FreeBSD.org> <20120911061530.GA77399@dragon.NUXI.org> <504EDC67.9070700@FreeBSD.org> <86sjao7q8c.fsf@ds4.des.no> <20120911205302.27484fd6@gumby.homeunix.com> <504FA511.8050904@delphij.net>
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On Tue, 11 Sep 2012 13:54:41 -0700 Xin Li wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 >=20 > On 09/11/12 12:53, RW wrote: > > On Tue, 11 Sep 2012 13:28:51 +0200 Dag-Erling Sm=F8rgrav wrote: > >=20 > >> Doug Barton <dougb@FreeBSD.org> writes: > >>> 1. Pseudo-randomize the order in which we utilize the files in=20 > >>> /var/db/entropy > >>=20 > >> There's no need for randomization if we make sure that *all* the > >> data written to /dev/random is used, rather than just the first > >> 4096 bytes; or that we reduce the amount of data to 4096 bytes > >> before we write it so none of it is discarded. My gut feeling is > >> that compression is better than hashing for that purpose, > >=20 > > It's analogous to a passphrase, have you ever heard of a passphrase > > being compressed rather than hashed? >=20 > Passphrase hashing is a completely different topic, as what we wanted > is a one-way function that can not be easily reversed, even when part > of the passphrase is known. I was refering to the conversion of a passphrase to key material=20
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