> Am 28.10.2016 um 16:11 schrieb Brian Kemp <brian.k...@gmail.com>: > > On 10/28/2016 07:33 AM, Paul van der Vlis wrote: >> Op 28-10-16 om 12:29 schreef Bob Ham: >>> On Fri, 2016-10-28 at 11:45 +0200, Paul van der Vlis wrote: >>> >>>> Those people >>>> have working GSM firmware what compiles using GCC, without blobs >>> >>> Unfortuantely, that firmware isn't legal to use in most jurisdictions. >>> The source code came from a leak and carries a proprietary license. The >>> people distributing it are violating copyright law. >> >> You are right. But phones with Replicant are using a modem with closed >> source firmware. Both is "bad". >> >> It's really difficult to create FOSS GSM firmware without examples, >> Michaela is bringing us examples. What Snowden did is very illigal too, >> but his information is very interesting. > > I suspect they will have to use the "Chinese Wall" method, like Compaq > did to clone the original IBM BIOS: > > Make a specification based upon what the leaked code does. > > Have people who have never seen the leaked code write a separate > implementation based entirely on the specification. > > That will be legal, at least in the US. > > It's time-consuming and requires people.
A significant portion of the specification what the firmware should do already exists: http://www.etsi.org/technologies-clusters/technologies/mobile/gsm https://www.tutorialspoint.com/gsm/gsm_protocol_stack.htm Of course someone has to buy them. And it exists inside of GSM protocol testers like: http://www.ebay.de/itm/Rohde-Schwarz-CMD55-54-57-59-GSM-DCS-PCS-900-1800-1900-RADIO-COM-Tester-/172076878961?hash=item281094cc71 Maybe TI can be accessed to get the data sheets and programming manuals of the Calypso - even under NDA. Then, the whole leaked source code would not be required.
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