Hi!
I've been hacking away a bit on a new library 'libosmosim' whihc is
scheduled to become part of libosmocore. In fact, as the automake
integration has been cleaned up, I'll probably merge it master any day
now.
The idea of this library is to
* understand the EF/DF hierarchy if GSM SIM, ETSI UICC and 3GPP USIM
* provide encoding and decoding routines for at least the most important
EFs
* decode the binary data into a generic data structure which can be used
by some form of a GUI application
* be able to re-encode from the generic parsed structure into the
binary form, possibly after modification from the UI
* be able to transact APDUs via T0 and T1 on PC/SC and other reader
interfaces, e.g. the OsmocomBB SIM interface
So the primary purpose of this is to be able to have a tool for
meaningful (human-readable/writable) modification of all files on a
programmable SIM card, such as the sysmoSIM-GR1 (and other cards where
you have the ADM PIN that gives you write permission).
Other useful purposes on the horizon of the library could be:
* implementation of a generic SIM/UICC/USIM simulator based on
user-created input, or based on 'ripped' SIM cards (well, you have to
provide the key in some way).
The current status is still quite experimental, but you can already see
the major parts:
* mapping of APDU and TPDU (only T=0 so far) on to 'struct msgb
struct osim_file_ops
encode and decode callbacks for a given file
struct osim_file_desc
node in the hierarchical description of filesystem tree
struct osim_decoded_data
the runtime representation of a decoded file:
struct osim_decoded_element
one decoded element in a decoded file
struct osim_card_sw
status + bitmask + human readable description
struct osim_card_profile
full description profile of card, including filesystem
hierarchy, status words and card-specific commands
struc osim_reader_hdl
represents a card reader (currently a slot in a reader,
not sure really how to represent multi-slot readers like
sim-banks yet). primarily consist of osim_reader_ops
struc osim_card_hdl
representing a card inside a reader
struc osim_chan_hdl
currently just a dummy. intended for logical channel support
most of the existing code is in src/sim/*.c, while some
not-yet-cleaned-up example code is in utils/osmo-sim-test.c. There are
gaps everywhere all over the place, and I think it will take quite some
time to fill those gaps.
Current roadmap:
* properly integrate all parts, so with a single call you can read in
the tree of all EFs of a card into their in-memory representation
* verify that the APIs for encoding/decoding functions work the way
they are before writing 'all' the EF decode/encode routines
* add more decoded element types, such as location area codes and the
like
So if you survived this mail until this point, I think you are a prime
candidate for contributing some code. Let me know if you're interested
in helping out.
Regards,
Harald
--
- Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
Hi Harald,
I can't tire of congratulating and the community for the great work you are
doing in creating a free world in your own capacity! I thank you.
Meanwhile, I would like to know a few things:
1. Is sysmoBTS capable of operating in MultiARFCN? Is multiARFCN
implemented in OpenBSC and if so how does one go about configuring it.
2. Also after the successful implementation of CSD, are there plans for PTT
over Cellular (PoC)?
Hi all!
This is the announcement for the next Osmocom Berlin meeting.
Sept 05, 8pm @ CCC Berlin, Marienstr. 11, 10113 Berlin
There is no formal presentation scheduled for this meeting.
If you are interested to show up, feel free to do so. There is no
registration required. The meeting is free as in "free beer", despite
no actual free beer being around.
Regards,
Harald
[p.s.: I myself will not be able to attend tonight, but I'm sure you
will be able to do just fine (or even better?)]
--
- Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
