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pySim.ota: Handle cases where 'secured_data' is empty

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while it's true that in situations where response_status == 'por_ok'
we are guaranteed to have a 'secured_data' key in the dict, its value
could well be b'', which in turn causes us to run into an exception,
calling a decoder on an empty byte value; let's avoid that.

Change-Id: I7c919f9987585d3b42347c54bd3082a54b8c2a0a
This commit is contained in:
Harald Welte
2024-07-13 22:56:37 +02:00
parent b865d383aa
commit dacacd206d
1 changed files with 1 additions and 1 deletions
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pySim/ota.py
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@@ -478,7 +478,7 @@ class OtaDialectSms(OtaDialect):
raise OtaCheckError('Unknown por_rc_cc_ds: %s' % spi['por_rc_cc_ds'])
# TODO: ExpandedRemoteResponse according to TS 102 226 5.2.2
if res.response_status == 'por_ok':
if res.response_status == 'por_ok' and len(res['secured_data']):
dec = CompactRemoteResp.parse(res['secured_data'])
else:
dec = None