11 Mar
2013
11 Mar
'13
5:25 p.m.
Hello,
to perform a 3G authentication with a USIM, you need to know the
authentication key K and counter SQN within the USIM.
RAND / AUTN generation is explained in TS 33.102, section 6.3.
2013/3/9 Rupert Lloyd <rupert.lloyd(a)gmail.com>om>:
Good Afternoon,
I am trying to perform USIM/3G authentication using osmo-sim-auth and ran
into the same problem as Stefanos:
http://lists.osmocom.org/pipermail/simtrace/2012-November/000406.html
I followed Benoit's advice to view the details as follows (using the inputs
from the web page):
rand_bin =
stringToByte(a2b_hex('00000000000000000000000000000000'))
autn_bin = stringToByte(a2b_hex('ec9320c2c2000000e1dd22c1ad3e2d3d'))
u.authenticate(RAND=rand_bin, AUTN=autn_bin,ctx='3G')
u.coms()
['INTERNAL AUTHENTICATE apdu: 00 88 00 81 22 10 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 10 EC 93 20 C2 C2 00 00 00 E1 DD 22 C1 AD 3E 2D 3D',
'sw1, sw2: 98 62 - undefined status',
(152, 98),
[]]
From TS 31.102, section 7.3.1 it looks like this means a MAC failure (0x98
0x62)
Can anyone point me to a resource for computing parameters with a valid MAC?
Thanks for your attention,
Rupert