20 Sep
2020
20 Sep
'20
1:55 p.m.
Dear Sergei,
I'm not an expert in GEA and it's been a long time since I last looked at it.
However,
On Fri, Sep 18, 2020 at 12:53:43PM +0300, Сергей Егоров wrote:
Can the value of IOV_UI (Osmocom BS: 0, real BS: 0x10000000) affect the deciphering, and if yes then how??
well, as you know the IV (initialization vector) is an input parameter into the encryption/decryption algorithm. It must match, otherwise you will get completely different results.
You could try to modify the Osmocom stack (here: OsmoSGSN) to also use the same IV that you see in your commercial/production netwokr, and see if that gets you any further in understanding any differences?
--
- Harald Welte laforge@osmocom.org http://laforge.gnumonks.org/
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