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Sylvain Munaut 246tnt at gmail.comHi,
>>> I think it'd be useful to split the kasumi impl in its own file, so
>>> that we can use it to implement GEA3 GPRS cipher as well.
> I'd do that in 2nd version of a patch: both Kasumi and KGcore functions are shared so
> it make sense.
Also, please put any internal method as 'static' so we can avoid
polluting the namespace.
>> please note that there is already a libosmo-crypt-a53
>> (http://cgit.osmocom.org/cgit/libosmo-crypt-a53) which implements A5/3
>> and GEA3. However, it's based on the reference code, which may be
>> problematic to distribute.
> Awesome, I can use it for easier testing :)
> Is there build instructions somewhere? Has it bean tested against actual phones?
It's automake ...
I think GEA3 has been tested, but not A5/3. It's doesn't even
integrate with the osmo_a5(...) functions.
GPRS cipher and Auth use a sort of plugin system, mostly because the
algorithm used in there are still secret and so implementation is
sometime provided by external devices / libraries / processes. For the
A5/x ciphers, they're all public so they use direct linking and not a
dynamic plugin system.
Cheers,
Sylvain