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Message-ID: <8cd1ed20707051322u25305959m6179268fa7a29c14@mail.gmail.com>
Date: Fri, 6 Jul 2007 08:22:50 +1200
From: "Kent Fredric" <kentfredric@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] [OT] Storing ssh and gpg keys in USB flash drives
In-Reply-To: <897b7c080707050342t143c704l8f75321ee5b7529b@mail.gmail.com>
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On 7/5/07, Jos=E9 Gonz=E1lez G=F3mez <jgonzalez.openinput@gmail.com> wrote:
> Hi there,
>
> I would like to store my ssh and gpg keys in my usb flash drive, but I'm =
not
> sure what's the best way to do it:
>
> If I use vfat so I can also read them from Windows I have two problems:
> first you must mount your USB key with a 0077 umask, so ssh and gpg doesn=
't
> complain about key permissions; latest KDE version seems to auto mount US=
B
> flash drives using pmount with a 0022 umask and I haven't been able to
> change this, so I either mount it manually or change the permissions afte=
r
> being mounted. The second problem is related to gpg: it seems that gpg us=
es
> links to lock the keyrings, and vfat doesn't support them, so I'm able to
> read keys, but not to make any modfication on them.
>
> If I use ext2 the permission problem goes away (kind of), but I have the
> feeling that this isn't as portable as vfat, as the filesystem uses the u=
ser
> id to control access to files, and pluging the drive in another system wh=
ere
> my user may have anoter uid leads me to chowning/chmoding in the better c=
ase
> or not having access to my keys in the worst case.
>
> Any ideas?
>
> Best regards
> Jose
>
vfat{
vfatfiles
ext2fs{
gpg_stuff
}
}
1. Mount vfat drive
2. dd if=3D/dev/full bs=3D1048580 count=3D4096 of =3D/mountpoint/mynewextfi=
le
3. mkfs.ext2 /mountpoin/mynewextfile
4. mount /mountpoint/mynewextfile/ /someothermountpoint/
5. cp files to /someothermountpoint/
6. use /someothermountpoint/
7. umount /someothermountpoint/
8. umount /mountpoint/
I didn't say it would be pretty, but that is a handy trick to have up the s=
leve.
that would make a 4 Meg file containing a filesystem to hold your
files, just like a TAR file, except with all the features of ext2 and
no need unpack it to use.
You can do anything with linux, really. Yes. even format a file as a
filesystem and mount it
( a word of warning : dont do this and format with reiserfs and then
store that file on a reiserfs fs ... if you do, next time you need to
--rebuild-tree reiser will try to be smart and trash your drive :) ...
learn't the hard way )
--=20
Kent
ruby -e '[1, 2, 4, 7, 0, 9, 5, 8, 3, 10, 11, 6, 12, 13].each{|x|
print "enNOSPicAMreil kdrtf@gma.com"[(2*x)..(2*x+1)]}'
--
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