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Use construct 'Flag' instead of 'Bit' for type descriptions

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It's better for the human reader (and more obvious that it's a boolean
value) if we decode single Bits as True/False instead of 1/0.

Change-Id: Ib025f9c4551af7cf57090a0678ab0f66a6684fa4
This commit is contained in:
Harald Welte
2023-11-03 01:33:06 +01:00
committed by laforge
parent 7be68b2980
commit 45477a767b
2 changed files with 19 additions and 19 deletions
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34
pySim/sysmocom_sja2.py
View File

@@ -140,14 +140,14 @@ class EF_GP_DIV_DATA(LinFixedEF):
class EF_SIM_AUTH_KEY(TransparentEF):
_test_de_encode = [
( '14000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f',
{"cfg": {"use_sres_deriv_func_2": 0, "use_opc_instead_of_op": 1, "algorithm": "milenage"}, "key":
{"cfg": {"sres_deriv_func": 1, "use_opc_instead_of_op": True, "algorithm": "milenage"}, "key":
"000102030405060708090a0b0c0d0e0f", "op_opc": "101112131415161718191a1b1c1d1e1f"} ),
]
def __init__(self, fid='6f20', name='EF.SIM_AUTH_KEY'):
super().__init__(fid, name=name, desc='USIM authentication key')
CfgByte = BitStruct(Padding(2),
'use_sres_deriv_func_2'/Bit,
'use_opc_instead_of_op'/Bit,
'sres_deriv_func'/Mapping(Bit, {1:0, 2:1}),
'use_opc_instead_of_op'/Flag,
'algorithm'/Enum(Nibble, milenage=4, comp128v1=1, comp128v2=2, comp128v3=3))
self._construct = Struct('cfg'/CfgByte,
'key'/HexAdapter(Bytes(16)),
@@ -181,19 +181,19 @@ class DF_SYSTEM(CardDF):
class EF_USIM_SQN(TransparentEF):
_test_de_encode = [
( 'd503000200000000000200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
{"flag1": {"skip_next_sqn_check": 1, "delta_max_check": 1, "age_limit_check": 0, "sqn_check": 1,
"ind_len": 5}, "flag2": {"rfu": 0, "dont_clear_amf_for_macs": 0, "aus_concealed": 1,
"autn_concealed": 1}, "delta_max": 8589934592, "age_limit":
{"flag1": {"skip_next_sqn_check": True, "delta_max_check": True, "age_limit_check": False, "sqn_check": True,
"ind_len": 5}, "flag2": {"rfu": 0, "dont_clear_amf_for_macs": False, "aus_concealed": True,
"autn_concealed": True}, "delta_max": 8589934592, "age_limit":
8589934592, "freshness": [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0]} ),
]
def __init__(self, fid='af30', name='EF.USIM_SQN'):
super().__init__(fid, name=name, desc='SQN parameters for AKA')
Flag1 = BitStruct('skip_next_sqn_check'/Bit, 'delta_max_check'/Bit,
'age_limit_check'/Bit, 'sqn_check'/Bit,
Flag1 = BitStruct('skip_next_sqn_check'/Flag, 'delta_max_check'/Flag,
'age_limit_check'/Flag, 'sqn_check'/Flag,
'ind_len'/BitsInteger(4))
Flag2 = BitStruct('rfu'/BitsRFU(5), 'dont_clear_amf_for_macs'/Bit,
'aus_concealed'/Bit, 'autn_concealed'/Bit)
Flag2 = BitStruct('rfu'/BitsRFU(5), 'dont_clear_amf_for_macs'/Flag,
'aus_concealed'/Flag, 'autn_concealed'/Flag)
self._construct = Struct('flag1'/Flag1, 'flag2'/Flag2,
'delta_max' /
BytesInteger(6), 'age_limit'/BytesInteger(6),
@@ -204,8 +204,8 @@ class EF_USIM_AUTH_KEY(TransparentEF):
def __init__(self, fid='af20', name='EF.USIM_AUTH_KEY'):
super().__init__(fid, name=name, desc='USIM authentication key')
Algorithm = Enum(Nibble, milenage=4, sha1_aka=5, tuak=6, xor=15)
CfgByte = BitStruct(Padding(1), 'only_4bytes_res_in_3g'/Bit,
'sres_deriv_func_2_in_3g'/Mapping(Bit, {1:0, 2:1}),
CfgByte = BitStruct(Padding(1), 'only_4bytes_res_in_3g'/Flag,
'sres_deriv_func_in_2g'/Mapping(Bit, {1:0, 2:1}),
'use_opc_instead_of_op'/Mapping(Bit, {False:0, True:1}),
'algorithm'/Algorithm)
self._construct = Struct('cfg'/CfgByte,
@@ -216,7 +216,7 @@ class EF_USIM_AUTH_KEY(TransparentEF):
# the TUAK and non-TUAK situation
CfgByteTuak = BitStruct(Padding(1),
'key_length'/Mapping(Bit, {128:0, 256:1}),
'sres_deriv_func_in_3g'/Mapping(Bit, {1:0, 2:1}),
'sres_deriv_func_in_2g'/Mapping(Bit, {1:0, 2:1}),
'use_opc_instead_of_op'/Mapping(Bit, {False:0, True:1}),
'algorithm'/Algorithm)
TuakCfgByte = BitStruct(Padding(1),
@@ -245,15 +245,15 @@ class EF_USIM_AUTH_KEY(TransparentEF):
class EF_USIM_AUTH_KEY_2G(TransparentEF):
_test_de_encode = [
( '14000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f',
{"cfg": {"only_4bytes_res_in_3g": 0, "use_sres_deriv_func_2_in_3g": 0, "use_opc_instead_of_op": 1,
{"cfg": {"only_4bytes_res_in_3g": False, "sres_deriv_func_in_2g": 1, "use_opc_instead_of_op": True,
"algorithm": "milenage"}, "key": "000102030405060708090a0b0c0d0e0f", "op_opc":
"101112131415161718191a1b1c1d1e1f"} ),
]
def __init__(self, fid='af22', name='EF.USIM_AUTH_KEY_2G'):
super().__init__(fid, name=name, desc='USIM authentication key in 2G context')
CfgByte = BitStruct(Padding(1), 'only_4bytes_res_in_3g'/Bit,
'use_sres_deriv_func_2_in_3g'/Bit,
'use_opc_instead_of_op'/Bit,
CfgByte = BitStruct(Padding(1), 'only_4bytes_res_in_3g'/Flag,
'sres_deriv_func_in_2g'/Mapping(Bit, {1:0, 2:1}),
'use_opc_instead_of_op'/Flag,
'algorithm'/Enum(Nibble, milenage=4, comp128v1=1, comp128v2=2, comp128v3=3, xor=14))
self._construct = Struct('cfg'/CfgByte,
'key'/HexAdapter(Bytes(16)),

4
pySim/ts_31_102.py
View File

@@ -889,14 +889,14 @@ class EF_FromPreferred(TransparentEF):
def __init__(self, fid='6ff7', sfid=None, name='EF.FromPreferred', size=(1, 1),
desc='From Preferred', **kwargs):
super().__init__(fid, sfid=sfid, name=name, desc=desc, size=size, **kwargs)
self._construct = BitStruct('rfu'/BitsRFU(7), 'from_preferred'/Bit)
self._construct = BitStruct('rfu'/BitsRFU(7), 'from_preferred'/Flag)
# TS 31.102 Section 4.2.114
class EF_eAKA(TransparentEF):
def __init__(self, fid='6f01', sfid=None, name='EF.eAKA', size=(1, 1),
desc='enhanced AKA support', **kwargs):
super().__init__(fid, sfid=sfid, name=name, desc=desc, size=size, **kwargs)
self._construct = BitStruct('rfu'/BitsRFU(7), 'enhanced_sqn_calculation_supported'/Bit)
self._construct = BitStruct('rfu'/BitsRFU(7), 'enhanced_sqn_calculation_supported'/Flag)
######################################################################