7 Apr
2021
7 Apr
'21
12:49 a.m.
Dear Osmocom community,
two months later, a lot of work has been going into pySim-shell. The following
features are now available from pysim.git master:
* we now have a 'tree' command to list the filesystem hierarchy
* you can now select arbitrary files by FID, even those not specified in 3GPP
* there is now an 'export' command, which will iterate over all records in all
files and dump them in an output format that can be used by pySim-shell itself
to restore the data
* we have the start of a user manual including a reference to the various
pySim-shell comamnds. A preview is available at
https://people.osmocom.org/laforge/tmp/pysim-doc-test/html/
* you can now use python setuptools to build and install dependencies, etc.
* pySim-shell can retriev the card-specific ADM PIN from a CSV file in your home
The latest invention (just pushed to gerrit for review) is the
integration of JSONpath support, wich allows you to specify certain
parts of a decoded file or record[s] to be updated. If you've never
heard of JSONpath: It is to JSON what XPath is to XML.
First example on how to use this:
------------------------------------------
pySIM-shell (MF/ADF.USIM/EF.FPLMN)> read_binary_decoded
[
{
"mcc": 262,
"mnc": 42
},
{
"mcc": 262,
"mnc": 42
},
{
"mcc": 262,
"mnc": 42
},
{
"mcc": 262,
"mnc": 42
}
]
pySIM-shell (MF/ADF.USIM/EF.FPLMN)> update_binary_decoded --json-path [*] null
pySIM-shell (MF/ADF.USIM/EF.FPLMN)> read_binary_decoded
[
null,
null,
null,
null
]
pySIM-shell (MF/ADF.USIM/EF.FPLMN)> update_binary_decoded --json-path [2]
'{"mcc":"262", "mnc":"42"}'
pySIM-shell (MF/ADF.USIM/EF.FPLMN)> read_binary_decoded
[
null,
null,
{
"mcc": 262,
"mnc": 42
},
null
]
------------------------------------------
Second example, illustrating its use in more complex JSON types:
------------------------------------------
pySIM-shell (MF/ADF.USIM/EF.AD)> read_binary_decoded
{
"ms_operation_mode": "normal",
"specific_facilities": {
"ofm": true
},
"len_of_mnc_in_imsi": 2
}
pySIM-shell (MF/ADF.USIM/EF.AD)> update_binary_decoded --json-path
specific_facilities.ofm false
pySIM-shell (MF/ADF.USIM/EF.AD)> read_binary_decoded
{
"ms_operation_mode": "normal",
"specific_facilities": {
"ofm": false
},
"len_of_mnc_in_imsi": 2
}
------------------------------------------
Stay tuned for more pySim developments coming up. Any feedback is
welcome - as is help with writing encoder/decoder methods for all the
files that don't have any yet.
Regards,
Harald
--
- Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/
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