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What Can We Do To Help?

Discussion in 'HD/HDR-FOX T2 Customised Firmware' started by Black Hole, Aug 27, 2011.

  1. Black Hole

    Black Hole May contain traces of nut

    I for one am not technically competent to help out with the coding and such like (not without a lot of hand-holding to start with anyway), but I feel I make a contribution by collating and prodding.

    Well, here's another prod:

    What do the BYTs think us lesser mortals could do to help out? I hope they might make some suggestions, but I'll start off a few ideas below.
  2. Black Hole

    Black Hole May contain traces of nut

    First idea:

    Non-modders could download StDef recordings directly to PC across the network (in a decrypted state) if there was a way to work out the media ID that the DLNA server uses to identify the recording file. I found XBMC exposed the media ID (it looks something like "<short_number>.TS") when I first tried it out, but that seems to have gone away and I don't know why. Maybe one of the other DLNA clients out there will do that, or provide the means to save a file instead of just playing it, even if they are incompatible with the .TS?

    Here's a starting point for somebody to trawl: http://en.wikipedia.org/wiki/List_of_UPnP_AV_media_servers_and_clients#UPnP_AV_clients
  3. Black Hole

    Black Hole May contain traces of nut

    Second idea:

    The encryption method and keys are probably buried in the Broadcomm chip in the Humax. It should be possible to analyse an encrypted file and the equivalent decrypted file to work out the encryption method and the key (for any particular Humax) - the only real diffuiculty is lack of data, and with a block-encrypted video file there is a huge amount of data! Somebody could scour the Internet for information (and cross-check it) or utilities that will do that.
  4. danco

    danco Member

    Just a note that XNMC or Kinsky Desktop would be the best uPnP clients to check, as they are cross-platform.
  5. af123

    af123 Administrator Staff Member

    Yes, they are within a hardware security module and cannot be extracted as far as we know without resorting to something like JTAG.

    Unfortunately not. Knowing the input and output data for an encryption algorithm does not enable you to find the key any faster, you still need to brute force it. The algorithm is likely to be either AES-128 or 3DES and somebody on here said that the FoxSAT uses 3DES so I would imagine the T2 does too.
  6. Black Hole

    Black Hole May contain traces of nut

    Fair enough. We don't need it for the HDR of course, but knowledge of the encryption would have enabled HD-FOX users to release their recordings without booting HDR-mode.
  7. Black Hole

    Black Hole May contain traces of nut

    I wouldn't know where to start, but I notice XBMC (I assume that's what you mean) is open source, so presumably somebody in the know could make it display the media IDs when browsing the server, and I wouldn't think it would be too difficult (just adding a variable to an output line perhaps).
  8. danco

    danco Member

    The solution to getting the media ID from XBMC turns out to be really easy. I use a Mac, so I don't know where the relevant file would be on a PC.

    XBMC produces a log file, and the ID is in that, and can easily be read off by eye. Alternatively, it should not be difficult to create a program that extracts it, since one could grep for a string beginning http and ending ts.

    I'm having some problems with the decrypted file, which I will comment on in the other thread.

    Oh, I see that this solution had been found a short while ago in the other thread.
  9. Black Hole

    Black Hole May contain traces of nut

    Ha! That's exactly what I've been working on overnight, just written it up too. Great minds...
  10. Black Hole

    Black Hole May contain traces of nut

    News Flash: a ready-made DLNA file manager has been located, see here (click).