Date: Fri, 23 Oct 2015 14:10:30 -0400 From: "Michael B. Eichorn" <ike@michaeleichorn.com> To: Michael Schuster <michaelsprivate@gmail.com> Cc: "O. Hartmann" <ohartman@zedat.fu-berlin.de>, freebsd-questions <freebsd-questions@freebsd.org> Subject: Re: replace uname -a informational string Message-ID: <1445623830.1169.44.camel@michaeleichorn.com> In-Reply-To: <CADqw_g%2By=xpzvwk7k8oaC=%2Bdi_WJPBsMVbpgSasX2QchPD4OiQ@mail.gmail.com> References: <20151023090805.5484ce9b@freyja.zeit4.iv.bundesimmobilien.de> <1445622325.1169.29.camel@michaeleichorn.com> <CADqw_g%2By=xpzvwk7k8oaC=%2Bdi_WJPBsMVbpgSasX2QchPD4OiQ@mail.gmail.com>
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--=-2O+BW23vZDTlqzYIYPZM Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, 2015-10-23 at 19:47 +0200, Michael Schuster wrote: > I seem to remember there's a trick using dtrace where you intercept the > uname syscall/library call .. that was on Solaris, though, don't know > how > that would map onto FreeBSD. >=20 > regards > Michael But doesn't that only block uname? What about 'strings'? If the concern is security I would think it would be best not to compile the information in at all. The build system was designed to share the build hostname not hide it after all. >=20 > On Fri, Oct 23, 2015 at 7:45 PM, Michael B. Eichorn < > ike@michaeleichorn.com> > wrote: >=20 > > On Fri, 2015-10-23 at 09:08 +0200, O. Hartmann wrote: > > > For security purposes, I need to replace the informations given by > > > "uname -a" > > > to hode the kernel build system, name et cetera. > >=20 > > I presume you intendend 'hide' here? > >=20 > > If you want to scrub a binaries of _all_ information about the > > building > > system this is a problem Debian is actively working on called > > 'reproducible builds' but is not possible today. > >=20 > > https://reproducible.debian.net > >=20 > > If you want to hide the hostname, why not just build with a different > > hostname set? > >=20 > > >=20 > > > Is there a way to achieve this via setting some knobs in the > > > process of > > > a > > > buildkernel? > > >=20 > > > Please CC me, I'm not subscriber of the list. > > >=20 > > > Kind regards and thanks in advance, > > >=20 > > > O. 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