mirror of https://gerrit.osmocom.org/pysim
114 lines
6.0 KiB
Python
114 lines
6.0 KiB
Python
# -*- coding: utf-8 -*-
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# without this, pylint will fail when inner classes are used
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# within the 'nested' kwarg of our TlvMeta metaclass on python 3.7 :(
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# pylint: disable=undefined-variable
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"""
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APDU commands of 3GPP TS 31.102 V16.6.0
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"""
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from typing import Dict
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from construct import BitStruct, Enum, BitsInteger, Int8ub, Bytes, this, Struct, If, Switch, Const
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from construct import Optional as COptional
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from pySim.filesystem import *
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from pySim.construct import *
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from pySim.ts_31_102 import SUCI_TlvDataObject
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from pySim.apdu import ApduCommand, ApduCommandSet
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# Copyright (C) 2022 Harald Welte <laforge@osmocom.org>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Mapping between USIM Service Number and its description
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# TS 31.102 Section 7.1
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class UsimAuthenticateEven(ApduCommand, n='AUTHENTICATE', ins=0x88, cla=['0X', '4X', '6X']):
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_apdu_case = 4
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_construct_p2 = BitStruct('scope'/Enum(Flag, mf=0, df_adf_specific=1),
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BitsInteger(4),
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'authentication_context'/Enum(BitsInteger(3), gsm=0, umts=1,
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vgcs_vbs=2, gba=4))
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_cs_cmd_gsm_3g = Struct('_rand_len'/Int8ub, 'rand'/HexAdapter(Bytes(this._rand_len)),
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'_autn_len'/COptional(Int8ub), 'autn'/If(this._autn_len, HexAdapter(Bytes(this._autn_len))))
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_cs_cmd_vgcs = Struct('_vsid_len'/Int8ub, 'vservice_id'/HexAdapter(Bytes(this._vsid_len)),
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'_vkid_len'/Int8ub, 'vk_id'/HexAdapter(Bytes(this._vkid_len)),
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'_vstk_rand_len'/Int8ub, 'vstk_rand'/HexAdapter(Bytes(this._vstk_rand_len)))
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_cmd_gba_bs = Struct('_rand_len'/Int8ub, 'rand'/HexAdapter(Bytes(this._rand_len)),
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'_autn_len'/Int8ub, 'autn'/HexAdapter(Bytes(this._autn_len)))
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_cmd_gba_naf = Struct('_naf_id_len'/Int8ub, 'naf_id'/HexAdapter(Bytes(this._naf_id_len)),
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'_impi_len'/Int8ub, 'impi'/HexAdapter(Bytes(this._impi_len)))
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_cs_cmd_gba = Struct('tag'/Int8ub, 'body'/Switch(this.tag, { 0xDD: 'bootstrap'/_cmd_gba_bs,
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0xDE: 'naf_derivation'/_cmd_gba_naf }))
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_cs_rsp_gsm = Struct('_len_sres'/Int8ub, 'sres'/HexAdapter(Bytes(this._len_sres)),
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'_len_kc'/Int8ub, 'kc'/HexAdapter(Bytes(this._len_kc)))
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_rsp_3g_ok = Struct('_len_res'/Int8ub, 'res'/HexAdapter(Bytes(this._len_res)),
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'_len_ck'/Int8ub, 'ck'/HexAdapter(Bytes(this._len_ck)),
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'_len_ik'/Int8ub, 'ik'/HexAdapter(Bytes(this._len_ik)),
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'_len_kc'/COptional(Int8ub), 'kc'/If(this._len_kc, HexAdapter(Bytes(this._len_kc))))
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_rsp_3g_sync = Struct('_len_auts'/Int8ub, 'auts'/HexAdapter(Bytes(this._len_auts)))
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_cs_rsp_3g = Struct('tag'/Int8ub, 'body'/Switch(this.tag, { 0xDB: 'success'/_rsp_3g_ok,
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0xDC: 'sync_fail'/_rsp_3g_sync}))
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_cs_rsp_vgcs = Struct(Const(b'\xDB'), '_vstk_len'/Int8ub, 'vstk'/HexAdapter(Bytes(this._vstk_len)))
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_cs_rsp_gba_naf = Struct(Const(b'\xDB'), '_ks_ext_naf_len'/Int8ub, 'ks_ext_naf'/HexAdapter(Bytes(this._ks_ext_naf_len)))
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def _decode_cmd(self) -> Dict:
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r = {}
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r['p1'] = parse_construct(self._construct_p1, self.p1.to_bytes(1, 'big'))
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r['p2'] = parse_construct(self._construct_p2, self.p2.to_bytes(1, 'big'))
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auth_ctx = r['p2']['authentication_context']
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if auth_ctx in ['gsm', 'umts']:
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r['body'] = parse_construct(self._cs_cmd_gsm_3g, self.cmd_data)
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elif auth_ctx == 'vgcs_vbs':
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r['body'] = parse_construct(self._cs_cmd_vgcs, self.cmd_data)
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elif auth_ctx == 'gba':
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r['body'] = parse_construct(self._cs_cmd_gba, self.cmd_data)
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else:
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raise ValueError('Unsupported authentication_context: %s' % auth_ctx)
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return r
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def _decode_rsp(self) -> Dict:
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r = {}
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auth_ctx = self.cmd_dict['p2']['authentication_context']
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if auth_ctx == 'gsm':
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r['body'] = parse_construct(self._cs_rsp_gsm, self.rsp_data)
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elif auth_ctx == 'umts':
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r['body'] = parse_construct(self._cs_rsp_3g, self.rsp_data)
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elif auth_ctx == 'vgcs_vbs':
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r['body'] = parse_construct(self._cs_rsp_vgcs, self.rsp_data)
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elif auth_ctx == 'gba':
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if self.cmd_dict['body']['tag'] == 0xDD:
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r['body'] = parse_construct(self._cs_rsp_3g, self.rsp_data)
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else:
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r['body'] = parse_construct(self._cs_rsp_gba_naf, self.rsp_data)
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else:
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raise ValueError('Unsupported authentication_context: %s' % auth_ctx)
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return r
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class UsimAuthenticateOdd(ApduCommand, n='AUTHENTICATE', ins=0x89, cla=['0X', '4X', '6X']):
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_apdu_case = 4
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_construct_p2 = BitStruct('scope'/Enum(Flag, mf=0, df_adf_specific=1),
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BitsInteger(4),
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'authentication_context'/Enum(BitsInteger(3), mbms=5, local_key=6))
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# TS 31.102 Section 7.5
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class UsimGetIdentity(ApduCommand, n='GET IDENTITY', ins=0x78, cla=['8X', 'CX', 'EX']):
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_apdu_case = 4
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_construct_p2 = BitStruct('scope'/Enum(Flag, mf=0, df_adf_specific=1),
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'identity_context'/Enum(BitsInteger(7), suci=1, suci_5g_nswo=2))
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_tlv_rsp = SUCI_TlvDataObject
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ApduCommands = ApduCommandSet('TS 31.102', cmds=[UsimAuthenticateEven, UsimAuthenticateOdd,
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UsimGetIdentity])
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