lynxis lazus has uploaded this change for review.

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ts_31_102: EF SUCI_Calc_Info: fix decoding empty files

When trying to use `edit_binary_decoded` with an empty file, pysim
runs into a len(None) exception, because hpkl.to_dict()['hnet_pubkey_list'] returns
None.

Can reproduced with a CCC Camp 2023 usim and editing the file.

Change-Id: Ib8e322e65dd768bfd49e7a5620a2163f12a74ec7
---
M pySim/ts_31_102.py
1 file changed, 4 insertions(+), 1 deletion(-)

git pull ssh://gerrit.osmocom.org:29418/pysim refs/changes/81/41581/1

diff --git a/pySim/ts_31_102.py b/pySim/ts_31_102.py
index 4ee6621..1f46241 100644
--- a/pySim/ts_31_102.py
+++ b/pySim/ts_31_102.py
@@ -389,7 +389,10 @@
         # remaining data holds Home Network Public Key Data Object
         hpkl = EF_SUCI_Calc_Info.HnetPubkeyList()
         hpkl.from_tlv(in_bytes[pos:])
-        hnet_pubkey_list = self._compact_pubkey_list(hpkl.to_dict()['hnet_pubkey_list'])
+
+        hnet_pubkey_list = []
+        if hpkl.to_dict()['hnet_pubkey_list']:
+            hnet_pubkey_list = self._compact_pubkey_list(hpkl.to_dict()['hnet_pubkey_list'])
 
         return {
             'prot_scheme_id_list': prot_scheme_id_list,

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