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Fix more odd-length digit sequences via PaddedBcdAdapter

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There are more files where trailing digits are indicated using 'f' and
should be stripped during decode, including EF.MSISDN and EF.VGCS

This is not just a presentation issue, but actually rendered wrong data
before, see the modified test output where our "read_record_uicc.ok"
file contained "bcd_len: 7" but then only 6 BCD digits due to this bug.

Change-Id: I4571482da924a3d645caa297108279d182448d21
This commit is contained in:
Harald Welte
2025-12-19 18:38:38 +01:00
parent 381519556c
commit 1da34c1a4f
3 changed files with 13 additions and 13 deletions
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6
pySim/ts_31_102.py
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@@ -596,7 +596,7 @@ class EF_ICI(CyclicEF):
self._construct = Struct('alpha_id'/Bytes(this._.total_len-28),
'len_of_bcd_contents'/Int8ub,
'ton_npi'/Int8ub,
'call_number'/BcdAdapter(Bytes(10)),
'call_number'/PaddedBcdAdapter(Rpad(Bytes(10))),
'cap_cfg2_record_id'/Int8ub,
'ext5_record_id'/Int8ub,
'date_and_time'/BcdAdapter(Bytes(7)),
@@ -612,7 +612,7 @@ class EF_OCI(CyclicEF):
self._construct = Struct('alpha_id'/Bytes(this._.total_len-27),
'len_of_bcd_contents'/Int8ub,
'ton_npi'/Int8ub,
'call_number'/BcdAdapter(Bytes(10)),
'call_number'/PaddedBcdAdapter(Rpad(Bytes(10))),
'cap_cfg2_record_id'/Int8ub,
'ext5_record_id'/Int8ub,
'date_and_time'/BcdAdapter(Bytes(7)),
@@ -1118,7 +1118,7 @@ class EF_Routing_Indicator(TransparentEF):
# responsibility of home network operator but BCD coding shall be used. If a network
# operator decides to assign less than 4 digits to Routing Indicator, the remaining digits
# shall be coded as "1111" to fill the 4 digits coding of Routing Indicator
self._construct = Struct('routing_indicator'/Rpad(BcdAdapter(Bytes(2)), 'f', 2),
self._construct = Struct('routing_indicator'/PaddedBcdAdapter(Rpad(Bytes(2))),
'rfu'/Bytes(2))
# TS 31.102 Section 4.4.11.13 (Rel 16)