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Prepare for decoding/encoding records differently based on record number

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In their infinite wisdom, the authors of the EIRENE FFFIS for GSM-R SIM
cards invented yet a new way of encoding data in SIM card files: The
first record of a file may be encoded differently than further records
of files.

Let's add the required infrastructure to pySim so that the encode and
decode methods for record-oriented files get passed in the current
record number.

Change-Id: I02d6942016dd0631b21d1fd301711c13cb27962b
Related: OS#5784
This commit is contained in:
Harald Welte
2023-01-24 15:42:26 +01:00
parent 8dbf714e96
commit f6b37af721
7 changed files with 46 additions and 42 deletions
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4
pySim/apdu/ts_102_221.py
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@@ -201,7 +201,7 @@ class ReadRecord(ApduCommand, n='READ RECORD', ins=0xB2, cla=['0X', '4X', '6X'])
return b2h(self.rsp_data)
method = getattr(self.file, 'decode_record_bin', None)
if self.successful and callable(method):
return method(self.rsp_data)
return method(self.rsp_data, self.cmd_dict['record_number'])
# TS 102 221 Section 11.1.6
class UpdateRecord(ApduCommand, n='UPDATE RECORD', ins=0xDC, cla=['0X', '4X', '6X']):
@@ -217,7 +217,7 @@ class UpdateRecord(ApduCommand, n='UPDATE RECORD', ins=0xDC, cla=['0X', '4X', '6
return b2h(self.cmd_data)
method = getattr(self.file, 'decode_record_bin', None)
if self.successful and callable(method):
return method(self.cmd_data)
return method(self.cmd_data, self.cmd_dict['record_number'])
# TS 102 221 Section 11.1.7
class SearchRecord(ApduCommand, n='SEARCH RECORD', ins=0xA2, cla=['0X', '4X', '6X']):