Re: WLAN decryption using a hex PSK key

[Sho Amano <samano.and () gmail com>]

2012/10/20 <mmann78 () netscape net>

> This was broken and fixed with bug 7661 (
> https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7661).    Perhaps its
> broken again (and bug needs to be reopened)?

It looks different from bug 7661, because when I tried with Wireshark 1.8.3
(which
contains the fix for the bug) I still could not decrypt the sample file.

Wireshark 1.8.2 (WiresharkPortable-1.8.2.paf.exe)
--> Wireshark refuses to set the hex-format key, showing an error dialog
    which says "error updating record: Invalid key format"

Wireshark 1.8.3 (WiresharkPortable-1.8.3.paf.exe)
--> I do not get the error dialog and I can set the hex-format key.
    However I still could not decrypt WLAN frames in the file.
    So it looks like same situation as latest trunk.

Thanks.


>  -----Original Message-----
> From: Sho Amano <samano.and () gmail com>
> To: wireshark-dev <wireshark-dev () wireshark org>
> Sent: Fri, Oct 19, 2012 3:07 pm
> Subject: [Wireshark-dev] WLAN decryption using a hex PSK key
>
>  Hi,
>
> This is the first time I send a mail to wireshark-dev. If there are
> something that
> I'm doing wrong, just let me know, thanks in advance.
>
> Recently I noticed that I can not decrypt WLAN frames that are encrypted
> with WPA-PSK (or PSK2), 64-digit hex format. The thing is, I could decrypt
> the same file using an old Wireshark (1.6.11).
> Is there any extra configuration that I need to run on the latest Wireshark
> to decrypt WLAN file with a hex key?
>
> Here is a sample file I captured using a Ralink dongle. I used an
> old 802.11g AP with WPA-PSK (not PSK2) security.
> https://dl.dropbox.com/u/21695553/wpa_decrypt_sample.pcap
>
> SSID: APTEST
> WPA-PSK: 0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF
>
>
>
> FYI, Here are what I tried. I'm using a x64 machine running Windows 7 Pro
> SP1 (64bit).
>
> Using latest Wireshark:
>
> 1. Download the latest Win64 binary "Wireshark-win64-1.9.0-SVN-45658.exe"
>    from http://www.wireshark.org/download/automated/win64/
>    and install it under C:\ws64test. Restart Windows.
> 2. Launch Wireshark, Go "Edit" -> "Preferences..." then select
>    "IEEE802.11" pane under "Protocols".
>    Check "Enable decryption:", click "Edit...", click "New" and
>    choose "wpa-psk" for the Key type. Also, Enter
>    "0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF"
>    for the Key and click "OK" -> "OK" -> "OK".
> 3. Restart Wireshark.
> 4. Open the sample pcap file. Packet number #301, for example, is not
> decrypted.
>
>
> Using old Wireshark:
>
> 1. Download "WiresharkPortable-1.6.11.paf.exe" and install it under
> C:\ws32old.
> 2. Launch Wireshark, Go "Edit" -> "Preferences..." then select
>    "IEEE802.11" pane under "Protocols".
>    Check "Enable decryption:" and then type
>
> "wpa-psk:0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF"
>    in the Key #1 box. Click "OK".
> 3. Restart Wireshark.
> 4. Open the sample pcap file. Packet number #301 is decrypted, and I can
> see
>    it is a TCP SYN packet.
>
> Thanks.
>
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