[ubuntu-uk] Reverse engineering data files
gareth.france at cliftonts.co.uk
Fri Jan 2 16:37:56 UTC 2015
I've got my new Primetest 300 tester today. I was rather peeved to
discover is ONLY downloads via bluetooth. Having purchased a dongle it
refused to connect. The bluetooth manager would flash up a code for me
to use for a fraction of a second then tell me it had failed. I did some
digging and someone suggested installing blueman which worked wonderfully.
However once connected you must then right click and select connect to
serial service which connects the tester to /dev/rfcomm0. So far so
good, the problem is the connection times out shortly after but ubuntu
keeps that port open and I have no idea how to close it so have to
reboot as the tester refuses to accept that it is connected unless you
close and re-open that port. Also I am not able to do the download at
all. It just keeps telling me the connection has timed out.
Using a gtkterm I have monitored the port and three chunks of data are
transmitted by the tester before it gives up:
I can only assume it is expecting a response to this in order to confirm
the PC is receiving. Any ideas?
On 29/12/14 07:31, Paul Sladen wrote:
> On Tue, 25 Nov 2014, Paul Sladen wrote:
>> On Mon, 24 Nov 2014, Gareth France wrote:
>>> Sounds good. The tricky bit is they seem to have encrypted the results
>> There doesn't appear to be anything encrypted.
> A newer '.sss' version (found packed inside a '.gar' container format)
> does appear to have been obfuscated: adding/subtracting a certain
> amount to each byte from the output of a xorshift PNR, seeded from the
> file-headers supplied immediately before the compressed stream:
> Obfuscation (as found here) is not encryption. But neither is ROT13
> encryption either:
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