Hello Andrew,
On Mon, 12 Nov 2012 10:25:19 +0000, "Andrew Back" andrew@carrierdetect.com wrote:
I'm trying to get some MS test equipment working and have programmed a SIM with pysim-prog.py, but the tester has a configuration field for RAND and I cannot see how to set this on the SIM. In fact this has confused me as I thought the network always supplied this...
Most certainly the RAND value of your MS tester is the value which is sent during authentication. All MS testers I have seen so far allow to configure this value, either use random data or set it to a fixed value.
I have the IMSI, Ki, MCC and MNC set the same on the tester and SIM, but tests don't get very far and fail with "incorrect SRES".
I would expect that you need a SIM card which supports XOR for A3/A8. This algorithm is the only one I have seen on nearly all MS tests sets I have access to. Those test sets usually don't support COMP128 and its variants (I guess your SIM card only supports this algorithm), so you need a SIM card which uses the same algorithm as the MS test set.
However if you can set a fixed RAND value on the MS test set you can check what your SIM card will return with this RAND and set Kc and SRES on the test set to those values.
Best regards, Dieter
Hi Dieter,
On 12 November 2012 12:39, Dieter Spaar spaar@mirider.augusta.de wrote:
Hello Andrew,
On Mon, 12 Nov 2012 10:25:19 +0000, "Andrew Back" andrew@carrierdetect.com wrote:
I'm trying to get some MS test equipment working and have programmed a SIM with pysim-prog.py, but the tester has a configuration field for RAND and I cannot see how to set this on the SIM. In fact this has confused me as I thought the network always supplied this...
Most certainly the RAND value of your MS tester is the value which is sent during authentication. All MS testers I have seen so far allow to configure this value, either use random data or set it to a fixed value.
Right, so I'm now thinking that the tester UI and documentation is probably just unclear/misleading.
I have the IMSI, Ki, MCC and MNC set the same on the tester and SIM, but tests don't get very far and fail with "incorrect SRES".
I would expect that you need a SIM card which supports XOR for A3/A8. This algorithm is the only one I have seen on nearly all MS tests sets I have access to. Those test sets usually don't support COMP128 and its variants (I guess your SIM card only supports this algorithm), so you need a SIM card which uses the same algorithm as the MS test set.
I've ordered one of those generic test SIMs from eBay and now I just need to wait for it to arrive from China... The description mentioned a number of common testers and so I'm guessing it must support XOR.
However if you can set a fixed RAND value on the MS test set you can check what your SIM card will return with this RAND and set Kc and SRES on the test set to those values.
I don't see any way to set SRES and Kc in the tester, sadly, so I think I will just have to wait and try with the test SIM when it arrives.
Thanks for your help!
Best,
Andrew
On 12 November 2012 12:39, Dieter Spaar spaar@mirider.augusta.de wrote:
I would expect that you need a SIM card which supports XOR for A3/A8. This algorithm is the only one I have seen on nearly all MS tests sets I have access to. Those test sets usually don't support COMP128 and its variants (I guess your SIM card only supports this algorithm), so you need a SIM card which uses the same algorithm as the MS test set.
I bought one of those generic test SIMs from eBay that claim to work with HP8922 etc. testers. Now this is probably another stupid question, but how do I determine the IMSI and Ki? Or maybe set them (pySim-prog.py doesn't seem to work with it).
Best,
Andrew
Hi,
you can read the IMSI in the EF_IMSI file on the SIM card. tools (like softSIM and others) are available to read that out for you. Ki is not readable on normal SIM cards. If it's a developer SIM, then you have to look in your SIMs manufacturer manual/specification. If it's a MagicCard, GreenCard, or SysmoSIM, you should be able to overwrite them using pySim-prog.py.
kevin
Excerpts from Andrew Back's message of Sat Nov 24 11:42:00 +0100 2012:
On 12 November 2012 12:39, Dieter Spaar spaar@mirider.augusta.de wrote:
I would expect that you need a SIM card which supports XOR for A3/A8. This algorithm is the only one I have seen on nearly all MS tests sets I have access to. Those test sets usually don't support COMP128 and its variants (I guess your SIM card only supports this algorithm), so you need a SIM card which uses the same algorithm as the MS test set.
I bought one of those generic test SIMs from eBay that claim to work with HP8922 etc. testers. Now this is probably another stupid question, but how do I determine the IMSI and Ki? Or maybe set them (pySim-prog.py doesn't seem to work with it).
Best,
Andrew
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