No algorithm nor key, but if I get the algorithm, probabily I'll get the key. On the vast majority of obscure systems, the cipher is weak. :-)
Looking forward for decryption.
If I get some documentation about the encryption systems, I'll send to the mailing list.
Thanks for your help!
Best regards.
Helio.
El mié., 16 mar. 2016 a las 14:44, Ralph A. Schmid, dk5ras (ralph@schmid.xxx) escribió:
You need to know the algorithm, then it is possible - if they hand you out the key. Without key I see no chance.
Ralph.
*From:* Tetrapol-kit [mailto:tetrapol-kit-bounces@brmlab.cz] *On Behalf Of *Helio Machado *Sent:* Wednesday, March 16, 2016 10:15 AM *To:* Jan Hrach; tetrapol-kit@brmlab.cz *Subject:* Re: [Tetrapol-kit] RP-CELP decoder doesn't seem to work
Thanks! Sorry if I bothered you without need.
Is there any chance of implementing decryption?
El mié., 16 mar. 2016 a las 1:14, Jan Hrach (jenda@yakumo.hrach.eu) escribió:
As you can see, there is KEY_TYPE=4 KEY_INDEX=5, so your network uses encryption. We are not able to decode it.
The original hardware codec decodes it this way: http://nat.brmlab.cz:8064/tpol/xgm1wspuj5.d/frames.ogg. It is encrypted, so no chance anything hearable will result.
Only a last question: How can I send the json files to the online
decoder? You run
cat *.json|grep '"type": "VOICE"'| grep -oE '"value": "[0-9a-f]{30}"'| cut -d " -f 4 | blhexbit | sed -re "s/(.)(.)(.)(.) (.)(.)(.)(.) /\8\7\6\5\4\3\2\1/g" | sed -re "s/^([01]{20})/\1_/g">voice.bits
and then paste the voice.bits file (or part of it as it is huge - sane is about 1500 lines a time) to http://nat.brmlab.cz:8064/
That is exactly what I did to get the above .ogg. However there is no point in it unless you see some traffic with KEY_TYPE=0 KEY_INDEX=0 or KEY_TYPE=15 KEY_INDEX=0, as you will get only encrypted gibberish.
On 15.3.2016 23:49, Helio Machado wrote:
In the attached zip, I also give the wav files that are the result of
using rp-celp python program.
Please listen them and say me if this is the expected output.
Feel free to use the attached captures to make the codec work.
If you request it, I can capture GB of data for you ;-)
Best regards.
El mar., 15 mar. 2016 a las 23:38, Helio Machado (<
crushedice2000@gmail.com mailto:crushedice2000@gmail.com>) escribió:
I've found this. I don't know if you've read this yet. Seemsinteresting.
http://wenku.baidu.com/view/5692b134ee06eff9aef80752.html http://www.baidu.com/p/line__up?from=wenku Seems like tetrapol specs... El mar., 15 mar. 2016 a las 22:36, Helio Machado (<crushedice2000@gmail.com mailto:crushedice2000@gmail.com>) escribió:
Ok. Only a last question: How can I send the json files to theonline decoder? Should I convert them to some other format?
Files:https://www.wetransfer.com/downloads/784210d89a2f8ffe6d049f3f21546de02016031...
Thanks for your quick response! El mar., 15 mar. 2016 a las 20:04, Jan Hrach (<jenda@yakumo.hrach.eu mailto:jenda@yakumo.hrach.eu>) escribió:
https://brmlab.cz/project/sdr/tetrapol/audio (yes, you can send them to me via mail too) On 15.3.2016 17:36, Helio Machado wrote: > To what site should I upload these json files? Can Iupload these files as attachment?
> > El mar., 15 mar. 2016 15:59, Jan Hrach <jenda@yakumo.hrach.eu mailto:jenda@yakumo.hrach.eu <mailto: jenda@yakumo.hrach.eu mailto:jenda@yakumo.hrach.eu>> escribió:
> > Send us session ID (the random string in URL) or theseframes.
> > On 15.3.2016 09:29, Helio Machado wrote: > > Hi! I'm testing the latest tetrapol-kit with aTETRAPOL signal (formerly known as SIRDEE here in Spain). I capture well, and decode to JSON, but when I use the rp-celp codec to extract audio, I only get weird sounds.
> > > > I don't know if I could send you a sample. > > > > crushedice2000 +=|at|=+ thatmailofgoogle . com > > > > Thanks in advance. > > > > Helio. > > -- > > Un saludo. > > Helio. > > > > > > _______________________________________________ > > Tetrapol-kit mailing list > > Tetrapol-kit@brmlab.cz <mailto:Tetrapol-kit@brmlab.cz> <mailto:Tetrapol-kit@brmlab.cz mailto: Tetrapol-kit@brmlab.cz>
> >https://brmlab.cz/cgi-bin/mailman/listinfo/tetrapol-kit
> > > > -- > Jan Hrach | http://jenda.hrach.eu/ > GPG CD98 5440 4372 0C6D 164D A24D F019 2F8E 6527 282E > > -- > Un saludo. > Helio. -- Jan Hrach | http://jenda.hrach.eu/ GPG CD98 5440 4372 0C6D 164D A24D F019 2F8E 6527 282E -- Un saludo. Helio. -- Un saludo. Helio.-- Un saludo. Helio.
-- Jan Hrach | http://jenda.hrach.eu/ GPG CD98 5440 4372 0C6D 164D A24D F019 2F8E 6527 282E
--
Un saludo.
Helio.