we do not have full TUAK support yet. All we can do so far is to set the
algorithm to TUAK, but we can not set configuration parameters and keys.
This patch adds features to modify the TUAK configuration byte. The key
and the TOP/TOPc is modified using the existing key and OP/OPC
commandline otions.
This patch also addes tests to verify sysmo-isim-tool,sja5.py. This also
includes TUAK.
Related: SYS#6473
In the current form we assume that the files that store the key material
and the related configuration parameters have the same layout for all
algorithms. This assumption makes sense since for the currently
supported algorithms (not TUAK) this is indeed true.
(With the exception that there may be RFU bits still set to 1, even
though the spec clearly state those bits should be 0. However, this does
not matter in practice)
With the advent of TUAK longer keys were introduced. This made a new file
layout necessary. Unfortunately this also means that we can not rely on
the coincidence described above. This means we have to be more specific
when reading and writing the files.
This patch adds classes to model the file layout for each algorithm.
We also print the key (and OP/OPc) for each location individually
(2g,3g,4g5g). Even though the programmed key should be the same in all
locations, this allows better diagnosis. Also with the advent of TUAK we
may have different key material in 4g5g location.
Related: SYS#6473
Philipp Maier