Libre baseband

Marek Sebera marek.sebera at gmail.com
Thu Dec 21 08:48:17 UTC 2017


Hi Harald!

* using phones that don't use secure/authenticated boot for the BBP, or
  those where the certificates have leaked and/or exploits are known

<>> Do we currently have any candidates? Or list of potential
candidates? Are ie. Nexus devices friendlier ?

* finding the time to work on the protocol stack beyond classic 2G which
  is currently implemented in OsmocomBB.

<>> Wild idea this might be, but do we need BBP with 2G stack ? Could we
settle for LTE-only open BBP ? I'm thinking about doing some chip works
and minimizing the software stack based on srsUE

Cheers :)
Marek

On 12/17/2017 01:33 PM, Harald Welte wrote:
> Hi Marek!
> 
> On Sun, Dec 17, 2017 at 12:58:00PM +0100, Marek Sebera wrote:
>> Silly idea maybe, but would it be possible to port osmocom-bb for
>> mediatek/intel/qualcomm BBP and replace the current firmware with open one?
> 
> theoretically possible, yes.
> 
>> I presume it will be a tremendous amount of work, no doubts, but apart from
>> that, is it theoretically and technically possible? Given root and/or
>> hardware acces of course, we do not need to preserve the old firmware or
>> exploit the update process (ie. if specific cert signature is needed for
>> bbp-soc firmware update)
> 
> The biggest challenges, from my point of view, are:
> 
> * using phones that don't use secure/authenticated boot for the BBP, or
>   those where the certificates have leaked and/or exploits are known
> * finding significant enough amount of leaked sources or documentation
>   and/or doing the reverse engineering required to understand how to talk
>   to the DSP and/or related peripherals
> * finding the time to work on the protocol stack beyond classic 2G which
>   is currently implemented in OsmocomBB.
> 
> Regards,
> 	Harald
> 

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