RFC: Generic (U)SIM software

historical

Well,

     If you know Erlang, C and C++, python you will learn Python fast!
     And the advantage is that Python has some projects in which they can be
leveraged, for example:

http://pyscard.sourceforge.net/
http://michau.benoit.free.fr/codes/smartcard/card/

   Recalling also that wrappers between Python and  Erlang or C are
relatively simple...

[]s

./alberto -fabiano -vvv

On Sat, Nov 26, 2011 at 16:12, Harald Welte <laforge at gnumonks.org> wrote:

> Hi all,
>
> I'm thinking of starting a project that would allow us to
>  * perform SIM and USIM card pre-personalization
>  * read/dump and explore [U]SIM contents interactively
>  * perform SIM card simulation
>
> The idea is to start with some generic data structure that can represent
> the filesystem tree (DFs, EFs) and their "external" properties, i.e.
> file type, size, permissions, FID, SFID, etc.
>
> This data structure could also have the actual file content associated
> with each EF.
>
> The second step would be some code that can take that data structure and
> program a freely-programmable card (like sysmoSIM-GR1) and create the
> files according to that structure.
>
> Another module would implement card-simulation (via BT SAP, SIMtrace or
> virtual PC/SC card).  After all, only a few instructions have to be
> imilpemented if the filesystem and its content is already in a generic
> data structure that the program can access..
>
> Next step would be to associate parser and generator routines for the
> content of each individual file as it is  specified in TS 11.11.
>
> After that has been done, we could think of representing the FS tree and
> the parsed contents of each file in some kind of graphical / user
> friendly representation.  The idea here is that the UI code would be
> generic and not know any of the actual ecnoding/decoding of the EF
> content.
>
> The biggest question is what language to use for this.  Some kind of
> object orientation might very well resemble the idea of a 'file object'
> in a tree, with many different file types, each having it's own
> parser/encoder.
>
> On the other hand, Erlang's bit field syntax would probably come very
> handy in terms of encoding/decoding the various EF content.  However, at
> least once we start to want some kidn of UI, Erlan really sucsk.  Also,
> almost nobody here reads/writes Erlang [yet?].
>
> Writing all this in C seems like a bit much of an effort, probably even
> more so on the UI side.  However, we already have quite a bit of C code
> for parsing/generating things like LAI, etc. which are stored like 04.08
> inside the sim card files.
>
> Python might be a good idea in terms of tons of available
> libraries/modules, object orientation and good UI bindings.  The biggest
> problem here is that my python skills are really limited so far, so my
> productivity might not be as high as I expect.
>
> The individual components could even be written in different
> languages, but then we would have to have some common format for
> exchanging data back and forth - which might not be worth it, given the
> small scope of the project.
>
> any ideas / comments / feedback?
>
> --
> - Harald Welte <laforge at gnumonks.org>
> http://laforge.gnumonks.org/
>
> ============================================================================
> "Privacy in residential applications is a desirable marketing option."
>                                                  (ETSI EN 300 175-7 Ch. A6)
>
>

-- 
~[&]s;

HH /* Happy Hackings! */

AL. /* @AlbertoFabiano */

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