laforge has uploaded this change for review. (
https://gerrit.osmocom.org/c/pysim/+/41835?usp=email )
Change subject: saip.validation: Verify unused mandatory services in header
......................................................................
saip.validation: Verify unused mandatory services in header
This adds a new check method to the
pySim.esim.saip.validation.CheckBasicStructure
class, which ensures that no unused authentication algorithm related mandatory
services are indicated in the ProfileHeader.
So if a profile e.g. states in the header it requires
usim-test-algorithm, but then the actual akaParameter instances do not
actually use that algorithm, it would raise an exception.
Change-Id: Id0e1988ae1936a321d04bc7c3c3a33262c767d30
Related: SYS#7826
---
M pySim/esim/saip/validation.py
1 file changed, 20 insertions(+), 0 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/pysim refs/changes/35/41835/1
diff --git a/pySim/esim/saip/validation.py b/pySim/esim/saip/validation.py
index 5e0323a..bf974c8 100644
--- a/pySim/esim/saip/validation.py
+++ b/pySim/esim/saip/validation.py
@@ -103,6 +103,26 @@
if 'profile-a-p256' in m_svcs and not ('usim' in m_svcs or 'isim' in
m_svcs):
raise ProfileError('profile-a-p256 mandatory, but no usim or isim')
+ def check_mandatory_services_aka(self, pes: ProfileElementSequence):
+ """Ensure that no unnecessary authentication related services are
marked as mandatory but not
+ actually used within the profile"""
+ m_svcs =
pes.get_pe_for_type('header').decoded['eUICC-Mandatory-services']
+ # list of tuples (algo_id, key_len_in_octets) for all the
akaParameters in the PE Sequence
+ algo_id_klen = [(x.decoded['algoConfiguration'][1]['algorithmID'],
+ len(x.decoded['algoConfiguration'][1]['key'])) for x
in pes.get_pes_for_type('akaParameter')]
+ # just a plain list of algorithm IDs in akaParameters
+ algorithm_ids = [x[0] for x in algo_id_klen]
+ if 'milenage' in m_svcs and not 1 in algorithm_ids:
+ raise ProfileError('milenage mandatory, but no related
algorithm_id in akaParameter')
+ if 'tuak128' in m_svcs and not (2, 128/8) in algo_id_klen:
+ raise ProfileError('tuak128 mandatory, but no related algorithm_id
in akaParameter')
+ if 'cave' in m_svcs and not pes.get_pe_for_type('cdmaParameter'):
+ raise ProfileError('cave mandatory, but no related cdmaParameter')
+ if 'tuak256' in m_svcs and (2, 256/8) in algo_id_klen:
+ raise ProfileError('tuak256 mandatory, but no related algorithm_id
in akaParameter')
+ if 'usim-test-algorithm' in m_svcs and not 3 in algorithm_ids:
+ raise ProfileError('usim-test-algorithm mandatory, but no related
algorithm_id in akaParameter')
+
def check_identification_unique(self, pes: ProfileElementSequence):
"""Ensure that each PE has a unique identification value."""
id_list = [pe.header['identification'] for pe in pes.pe_list if
pe.header]
--
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Gerrit-MessageType: newchange
Gerrit-Project: pysim
Gerrit-Branch: master
Gerrit-Change-Id: Id0e1988ae1936a321d04bc7c3c3a33262c767d30
Gerrit-Change-Number: 41835
Gerrit-PatchSet: 1
Gerrit-Owner: laforge <[email protected]>
