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From: Mick <michaelkintzios@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Why iwconfig wlan0 enc can't work?
Date: Fri, 21 Oct 2011 20:36:51 +0100
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On Friday 21 Oct 2011 15:03:31 Lavender wrote:
> The essid of my dormitory wireless netword is "Rebellion"
> and its password is "I'll leave it up to you"(It's OK to tell
> you this private information :-) ) .
> I typed command below
> #iwconfig wlan0 up
> #iwconfig wlan0 essid "Rebellion"
> Commands above worked normally, then
>=20
> #iwconfig wlan0 mode master
>=20
> Our AP mode which iwlist shows is master,
> but the command above failed. Error message was
> "Invalid argument".
Yes, your AP is operating in 'master' mode, while your PC's wireless NIC=20
operates in 'managed' mode since it is a wireless client.
> Then I typed
> #iwconfig wlan0 mode managed
> This worked ,=20
Good. :-)
> then
> #iwconfig wlan0 enc "I'll leave it up to you"
> This failed with error message "Invalid argument"
The "I'll leave it up to you" is not an encryption *key*, but a passphrase.
Have you looked at all at the man page for iwconfig? Read what it says und=
er=20
key/enc[ryption]:
"... Passphrase is currently not supported."
This means that you need to use the corresponding hexadecimal or ASCII=20
encryption key. The router should show what this is when you login in its=
=20
administrative GUI.
Alternatively, you can try running a script like this to generate a md5 has=
h -=20
no guarantees that it will work with your AP (different vendors have differ=
ent=20
implementations:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
#!/usr/bin/perl
# Perl script to convert a passphrase to a WEP key.
# By Aki Mimoto
use strict;
@ARGV or die "Usage: $0 passphrase\n";
print generate_key( @ARGV ), "\n";
sub generate_key {
# --------------------------------------------------
require Digest::MD5;
return substr Digest::MD5::md5_hex( substr( shift() x 64, 0, 64 ) )=
,=20
0, 26;
}
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Make it executable (using chmod u+x name of file) and then run it with your=
=20
passphrase. Note, I just found this on Google and have not tried it myself=
=2E =20
I would always use a hex or ASCII key instead.
Ideally though, I would not be using WEP encryption which all of the above=
=20
applies to, because it is not secure.
PS. You haven't told us if the AP is using WEP, but you have used a WEP=20
command to enter your encryption key - so I'm giving you here a WEP related=
=20
answer. ;-)
=2D-=20
Regards,
Mick
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