changing key as security feature in osmocom?

Sylvain Munaut 246tnt at gmail.com
Sat Feb 11 22:22:23 UTC 2012


> But maybe somebody (maybe you :)) is deep enough in the code, to easily find
> the place to put that in?

This is more Andreas' area of expertise.

However a quick grep on "key_seq" would get your started.

I guess you'd need:

 - Add a vty option for it
 - Add a 'subscr_get_key_seq' helper that either returns the real one
or force 7 if the privacy option is set
 - Replace direct subscr->key_seq access by this helper in each of the
3 possible initial messages :
    gsm48_mm_tx_loc_upd_req, gsm48_mm_tx_cm_serv_req, gsm48_rr_dl_est
(in the paging response creation)

Cheers,

    Sylvain




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