forked from public/pysim
Introduce APDU/TPDU trace decoder
This introduces a new pySim.apdu module hierarchy, which contains
classes that represent TPDU/APDUs as exchanged between
SIM/UICC/USIM/ISIM card and UE.
It contains instruction level decoders for SELECT, READ BINARY and
friends, and then uses the pySim.filesystem.Runtime{Lchan,State} classes
to keep track of the currently selected EF/DF/ADF for each logical
channel, and uses the file-specific decoder classes of pySim to decode
the actual file content that is being read or written.
This provides a much more meaningful decode of protocol traces than
wireshark will ever be able to give us.
Furthermore, there's the new pySim.apdu_source set of classes which
provides "input plugins" for obtaining APDU traces in a variety of
formats. So far, GSMTAP UDP live capture and pyshark based RSPRO
live and pcap file reading are imlpemented.
Change-Id: I862d93163d495a294364168f7818641e47b18c0a
Closes: OS#5126
This commit is contained in:
Harald Welte
510
pySim/apdu/ts_102_221.py
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510
pySim/apdu/ts_102_221.py
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@@ -0,0 +1,510 @@
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# coding=utf-8
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"""APDU definitions/decoders of ETSI TS 102 221, the core UICC spec.
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(C) 2022 by Harald Welte <laforge@osmocom.org>
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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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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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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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import logging
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from pySim.construct import *
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from pySim.filesystem import *
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from pySim.apdu import ApduCommand, ApduCommandSet
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from typing import Optional, Dict, Tuple
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logger = logging.getLogger(__name__)
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# TS 102 221 Section 11.1.1
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class UiccSelect(ApduCommand, n='SELECT', ins=0xA4, cla=['0X', '4X', '6X']):
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_apdu_case = 4
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_construct_p1 = Enum(Byte, df_ef_or_mf_by_file_id=0, child_df_of_current_df=1, parent_df_of_current_df=3,
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df_name=4, path_from_mf=8, path_from_current_df=9)
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_construct_p2 = BitStruct(Flag,
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'app_session_control'/Enum(BitsInteger(2), activation_reset=0, termination=2),
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'return'/Enum(BitsInteger(3), fcp=1, no_data=3),
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'aid_control'/Enum(BitsInteger(2), first_or_only=0, last=1, next=2, previous=3))
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@staticmethod
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def _find_aid_substr(selectables, aid) -> Optional[CardADF]:
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# full-length match
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if aid in selectables:
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return selectables[aid]
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# sub-string match
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for s in selectables.keys():
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if aid[:len(s)] == s:
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return selectables[s]
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return None
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def process_on_lchan(self, lchan: RuntimeLchan):
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mode = self.cmd_dict['p1']
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if mode in ['path_from_mf', 'path_from_current_df']:
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# rewind to MF, if needed
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if mode == 'path_from_mf':
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lchan.selected_file = lchan.rs.mf
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path = [self.cmd_data[i:i+2] for i in range(0, len(self.cmd_data), 2)]
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for file in path:
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file_hex = b2h(file)
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if file_hex == '7fff': # current application
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if not lchan.selected_adf:
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sels = lchan.rs.mf.get_app_selectables(['ANAMES'])
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# HACK: Assume USIM
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logger.warning('SELECT relative to current ADF, but no ADF selected. Assuming ADF.USIM')
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lchan.selected_adf = sels['ADF.USIM']
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lchan.selected_file = lchan.selected_adf
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#print("\tSELECT CUR_ADF %s" % lchan.selected_file)
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continue
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else:
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sels = lchan.selected_file.get_selectables(['FIDS'])
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if file_hex in sels:
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if self.successful:
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#print("\tSELECT %s" % sels[file_hex])
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lchan.selected_file = sels[file_hex]
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else:
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#print("\tSELECT %s FAILED" % sels[file_hex])
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pass
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continue
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logger.warning('SELECT UNKNOWN FID %s (%s)' % (file_hex, '/'.join([b2h(x) for x in path])))
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elif mode == 'df_ef_or_mf_by_file_id':
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if len(self.cmd_data) != 2:
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raise ValueError('Expecting a 2-byte FID')
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elif mode == 'df_name':
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# Select by AID (can be sub-string!)
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aid = self.cmd_dict['body']
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sels = lchan.rs.mf.get_app_selectables(['AIDS'])
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adf = self._find_aid_substr(sels, aid)
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if adf:
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lchan.selected_adf = adf
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lchan.selected_file = lchan.selected_adf
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#print("\tSELECT AID %s" % adf)
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else:
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logger.warning('SELECT UNKNOWN AID %s' % aid)
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pass
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else:
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raise ValueError('Select Mode %s not implemented' % mode)
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# decode the SELECT response
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if self.successful:
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self.file = lchan.selected_file
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return lchan.selected_file.decode_select_response(self.rsp_dict['body'])
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return None
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# TS 102 221 Section 11.1.2
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class UiccStatus(ApduCommand, n='STATUS', ins=0xF2, cla=['8X', 'CX', 'EX']):
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_apdu_case = 2
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_construct_p1 = Enum(Byte, no_indication=0, current_app_is_initialized=1, terminal_will_terminate_current_app=2)
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_construct_p2 = Enum(Byte, response_like_select=0, response_df_name_tlv=1, response_no_data=0x0c)
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def process_on_lchan(self, lchan):
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if self.cmd_dict['p2'] == 'response_like_select':
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return lchan.selected_file.decode_select_response(self.rsp_dict['body'])
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def _decode_binary_p1p2(p1, p2) -> Dict:
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ret = {}
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if p1 & 0x80:
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ret['file'] = 'sfi'
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ret['sfi'] = p1 & 0x1f
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ret['offset'] = p2
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else:
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ret['file'] = 'currently_selected_ef'
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ret['offset'] = ((p1 & 0x7f) << 8) & p2
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return ret
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# TS 102 221 Section 11.1.3
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class ReadBinary(ApduCommand, n='READ BINARY', ins=0xB0, cla=['0X', '4X', '6X']):
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_apdu_case = 2
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def _decode_p1p2(self):
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return _decode_binary_p1p2(self.p1, self.p2)
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def process_on_lchan(self, lchan):
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self._determine_file(lchan)
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if not isinstance(self.file, TransparentEF):
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return b2h(self.rsp_data)
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# our decoders don't work for non-zero offsets / short reads
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if self.cmd_dict['offset'] != 0 or self.lr < self.file.size[0]:
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return b2h(self.rsp_data)
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method = getattr(self.file, 'decode_bin', None)
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if self.successful and callable(method):
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return method(self.rsp_data)
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# TS 102 221 Section 11.1.4
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class UpdateBinary(ApduCommand, n='UPDATE BINARY', ins=0xD6, cla=['0X', '4X', '6X']):
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_apdu_case = 3
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def _decode_p1p2(self):
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return _decode_binary_p1p2(self.p1, self.p2)
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def process_on_lchan(self, lchan):
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self._determine_file(lchan)
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if not isinstance(self.file, TransparentEF):
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return b2h(self.rsp_data)
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# our decoders don't work for non-zero offsets / short writes
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if self.cmd_dict['offset'] != 0 or self.lc < self.file.size[0]:
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return b2h(self.cmd_data)
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method = getattr(self.file, 'decode_bin', None)
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if self.successful and callable(method):
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return method(self.cmd_data)
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def _decode_record_p1p2(p1, p2):
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ret = {}
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ret['record_number'] = p1
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if p2 >> 3 == 0:
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ret['file'] = 'currently_selected_ef'
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else:
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ret['file'] = 'sfi'
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ret['sfi'] = p2 >> 3
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mode = p2 & 0x7
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if mode == 2:
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ret['mode'] = 'next_record'
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elif mode == 3:
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ret['mode'] = 'previous_record'
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elif mode == 8:
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ret['mode'] = 'absolute_current'
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return ret
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# TS 102 221 Section 11.1.5
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class ReadRecord(ApduCommand, n='READ RECORD', ins=0xB2, cla=['0X', '4X', '6X']):
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_apdu_case = 2
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def _decode_p1p2(self):
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r = _decode_record_p1p2(self.p1, self.p2)
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self.col_id = '%02u' % r['record_number']
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return r
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def process_on_lchan(self, lchan):
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self._determine_file(lchan)
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if not isinstance(self.file, LinFixedEF):
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return b2h(self.rsp_data)
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method = getattr(self.file, 'decode_record_bin', None)
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if self.successful and callable(method):
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return method(self.rsp_data)
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# TS 102 221 Section 11.1.6
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class UpdateRecord(ApduCommand, n='UPDATE RECORD', ins=0xDC, cla=['0X', '4X', '6X']):
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_apdu_case = 3
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def _decode_p1p2(self):
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r = _decode_record_p1p2(self.p1, self.p2)
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self.col_id = '%02u' % r['record_number']
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return r
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def process_on_lchan(self, lchan):
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self._determine_file(lchan)
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if not isinstance(self.file, LinFixedEF):
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return b2h(self.cmd_data)
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method = getattr(self.file, 'decode_record_bin', None)
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if self.successful and callable(method):
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return method(self.cmd_data)
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# TS 102 221 Section 11.1.7
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class SearchRecord(ApduCommand, n='SEARCH RECORD', ins=0xA2, cla=['0X', '4X', '6X']):
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_apdu_case = 4
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_construct_rsp = GreedyRange(Int8ub)
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def _decode_p1p2(self):
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ret = {}
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sfi = self.p2 >> 3
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if sfi == 0:
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ret['file'] = 'currently_selected_ef'
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else:
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ret['file'] = 'sfi'
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ret['sfi'] = sfi
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mode = self.p2 & 0x7
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if mode in [0x4, 0x5]:
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if mode == 0x4:
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ret['mode'] = 'forward_search'
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else:
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ret['mode'] = 'backward_search'
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ret['record_number'] = self.p1
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self.col_id = '%02u' % ret['record_number']
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elif mode == 6:
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ret['mode'] = 'enhanced_search'
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# TODO: further decode
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elif mode == 7:
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ret['mode'] = 'proprietary_search'
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return ret
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def _decode_cmd(self):
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ret = self._decode_p1p2()
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if self.cmd_data:
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if ret['mode'] == 'enhanced_search':
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ret['search_indication'] = b2h(self.cmd_data[:2])
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ret['search_string'] = b2h(self.cmd_data[2:])
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else:
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ret['search_string'] = b2h(self.cmd_data)
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return ret
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def process_on_lchan(self, lchan):
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self._determine_file(lchan)
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return self.to_dict()
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# TS 102 221 Section 11.1.8
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class Increase(ApduCommand, n='INCREASE', ins=0x32, cla=['8X', 'CX', 'EX']):
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_apdu_case = 4
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PinConstructP2 = BitStruct('scope'/Enum(Flag, global_mf=0, specific_df_adf=1),
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BitsInteger(2), 'reference_data_nr'/BitsInteger(5))
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# TS 102 221 Section 11.1.9
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class VerifyPin(ApduCommand, n='VERIFY PIN', ins=0x20, cla=['0X', '4X', '6X']):
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_apdu_case = 3
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_construct_p2 = PinConstructP2
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@staticmethod
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def _pin_process(apdu):
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processed = {
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'scope': apdu.cmd_dict['p2']['scope'],
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'referenced_data_nr': apdu.cmd_dict['p2']['reference_data_nr'],
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}
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if apdu.lc == 0:
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# this is just a question on the counters remaining
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processed['mode'] = 'check_remaining_attempts'
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else:
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processed['pin'] = b2h(apdu.cmd_data)
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if apdu.sw[0] == 0x63:
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processed['remaining_attempts'] = apdu.sw[1] & 0xf
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return processed
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@staticmethod
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def _pin_is_success(sw):
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if sw[0] == 0x63:
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return True
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else:
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return False
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def process_on_lchan(self, lchan: RuntimeLchan):
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return VerifyPin._pin_process(self)
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def _is_success(self):
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return VerifyPin._pin_is_success(self.sw)
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# TS 102 221 Section 11.1.10
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class ChangePin(ApduCommand, n='CHANGE PIN', ins=0x24, cla=['0X', '4X', '6X']):
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_apdu_case = 3
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_construct_p2 = PinConstructP2
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def process_on_lchan(self, lchan: RuntimeLchan):
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return VerifyPin._pin_process(self)
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def _is_success(self):
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return VerifyPin._pin_is_success(self.sw)
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# TS 102 221 Section 11.1.11
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class DisablePin(ApduCommand, n='DISABLE PIN', ins=0x26, cla=['0X', '4X', '6X']):
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_apdu_case = 3
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_construct_p2 = PinConstructP2
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def process_on_lchan(self, lchan: RuntimeLchan):
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return VerifyPin._pin_process(self)
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def _is_success(self):
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return VerifyPin._pin_is_success(self.sw)
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# TS 102 221 Section 11.1.12
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class EnablePin(ApduCommand, n='ENABLE PIN', ins=0x28, cla=['0X', '4X', '6X']):
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_apdu_case = 3
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_construct_p2 = PinConstructP2
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def process_on_lchan(self, lchan: RuntimeLchan):
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return VerifyPin._pin_process(self)
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def _is_success(self):
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return VerifyPin._pin_is_success(self.sw)
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# TS 102 221 Section 11.1.13
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class UnblockPin(ApduCommand, n='UNBLOCK PIN', ins=0x2C, cla=['0X', '4X', '6X']):
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_apdu_case = 3
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_construct_p2 = PinConstructP2
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def process_on_lchan(self, lchan: RuntimeLchan):
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return VerifyPin._pin_process(self)
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def _is_success(self):
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return VerifyPin._pin_is_success(self.sw)
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# TS 102 221 Section 11.1.14
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class DeactivateFile(ApduCommand, n='DEACTIVATE FILE', ins=0x04, cla=['0X', '4X', '6X']):
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_apdu_case = 1
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_construct_p1 = BitStruct(BitsInteger(4),
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'select_mode'/Enum(BitsInteger(4), ef_by_file_id=0,
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path_from_mf=8, path_from_current_df=9))
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# TS 102 221 Section 11.1.15
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class ActivateFile(ApduCommand, n='ACTIVATE FILE', ins=0x44, cla=['0X', '4X', '6X']):
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_apdu_case = 1
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_construct_p1 = DeactivateFile._construct_p1
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# TS 102 221 Section 11.1.16
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auth_p2_construct = BitStruct('scope'/Enum(Flag, mf=0, df_adf_specific=1),
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BitsInteger(2),
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'reference_data_nr'/BitsInteger(5))
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class Authenticate88(ApduCommand, n='AUTHENTICATE', ins=0x88, cla=['0X', '4X', '6X']):
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_apdu_case = 4
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_construct_p2 = auth_p2_construct
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# TS 102 221 Section 11.1.16
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class Authenticate89(ApduCommand, n='AUTHENTICATE', ins=0x89, cla=['0X', '4X', '6X']):
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_apdu_case = 4
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_construct_p2 = auth_p2_construct
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# TS 102 221 Section 11.1.17
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class ManageChannel(ApduCommand, n='MANAGE CHANNEL', ins=0x70, cla=['0X', '4X', '6X']):
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_apdu_case = 2
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_construct_p1 = Enum(Flag, open_channel=0, close_channel=1)
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_construct_p2 = Struct('logical_channel_number'/Int8ub)
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_construct_rsp = Struct('logical_channel_number'/Int8ub)
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def process_global(self, rs):
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if not self.successful:
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return
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mode = self.cmd_dict['p1']
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if mode == 'open_channel':
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created_channel_nr = self.cmd_dict['p2']['logical_channel_number']
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if created_channel_nr == 0:
|
||||
# auto-assignment by UICC
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# pylint: disable=unsubscriptable-object
|
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created_channel_nr = self.rsp_data[0]
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||||
manage_channel = rs.get_lchan_by_cla(self.cla)
|
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manage_channel.add_lchan(created_channel_nr)
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||||
self.col_id = '%02u' % created_channel_nr
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elif mode == 'close_channel':
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closed_channel_nr = self.cmd_dict['p2']
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||||
rs.del_lchan(closed_channel_nr)
|
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self.col_id = '%02u' % closed_channel_nr
|
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else:
|
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raise ValueError('Unsupported MANAGE CHANNEL P1=%02X' % self.p1)
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||||
|
||||
# TS 102 221 Section 11.1.18
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||||
class GetChallenge(ApduCommand, n='GET CHALLENGE', ins=0x84, cla=['0X', '4X', '6X']):
|
||||
_apdu_case = 2
|
||||
|
||||
# TS 102 221 Section 11.1.19
|
||||
class TerminalCapability(ApduCommand, n='TERMINAL CAPABILITY', ins=0xAA, cla=['8X', 'CX', 'EX']):
|
||||
_apdu_case = 3
|
||||
|
||||
# TS 102 221 Section 11.1.20
|
||||
class ManageSecureChannel(ApduCommand, n='MANAGE SECURE CHANNEL', ins=0x73, cla=['0X', '4X', '6X']):
|
||||
@classmethod
|
||||
def _get_apdu_case(cls, hdr:bytes) -> int:
|
||||
p1 = hdr[2]
|
||||
p2 = hdr[3]
|
||||
if p1 & 0x7 == 0: # retrieve UICC Endpoints
|
||||
return 2
|
||||
elif p1 & 0xf in [1,2,3]: # establish sa, start secure channel SA
|
||||
p2_cmd = p2 >> 5
|
||||
if p2_cmd in [0,2,4]: # command data
|
||||
return 3
|
||||
elif p2_cmd in [1,3,5]: # response data
|
||||
return 2
|
||||
elif p1 & 0xf == 4: # terminate secure channel SA
|
||||
return 3
|
||||
raise ValueError('%s: Unable to detect APDU case for %s' % (cls.__name__, b2h(hdr)))
|
||||
|
||||
# TS 102 221 Section 11.1.21
|
||||
class TransactData(ApduCommand, n='TRANSACT DATA', ins=0x75, cla=['0X', '4X', '6X']):
|
||||
@classmethod
|
||||
def _get_apdu_case(cls, hdr:bytes) -> int:
|
||||
p1 = hdr[2]
|
||||
if p1 & 0x04:
|
||||
return 3
|
||||
else:
|
||||
return 2
|
||||
|
||||
# TS 102 221 Section 11.1.22
|
||||
class SuspendUicc(ApduCommand, n='SUSPEND UICC', ins=0x76, cla=['80']):
|
||||
_apdu_case = 4
|
||||
_construct_p1 = BitStruct('rfu'/BitsInteger(7), 'mode'/Enum(Flag, suspend=0, resume=1))
|
||||
|
||||
# TS 102 221 Section 11.1.23
|
||||
class GetIdentity(ApduCommand, n='GET IDENTITY', ins=0x78, cla=['8X', 'CX', 'EX']):
|
||||
_apdu_case = 4
|
||||
_construct_p2 = BitStruct('scope'/Enum(Flag, mf=0, df_adf_specific=1), BitsInteger(7))
|
||||
|
||||
# TS 102 221 Section 11.1.24
|
||||
class ExchangeCapabilities(ApduCommand, n='EXCHANGE CAPABILITIES', ins=0x7A, cla=['80']):
|
||||
_apdu_case = 4
|
||||
|
||||
# TS 102 221 Section 11.2.1
|
||||
class TerminalProfile(ApduCommand, n='TERMINAL PROFILE', ins=0x10, cla=['80']):
|
||||
_apdu_case = 3
|
||||
|
||||
# TS 102 221 Section 11.2.2 / TS 102 223
|
||||
class Envelope(ApduCommand, n='ENVELOPE', ins=0xC2, cla=['80']):
|
||||
_apdu_case = 4
|
||||
|
||||
# TS 102 221 Section 11.2.3 / TS 102 223
|
||||
class Fetch(ApduCommand, n='FETCH', ins=0x12, cla=['80']):
|
||||
_apdu_case = 2
|
||||
|
||||
# TS 102 221 Section 11.2.3 / TS 102 223
|
||||
class TerminalResponse(ApduCommand, n='TERMINAL RESPONSE', ins=0x14, cla=['80']):
|
||||
_apdu_case = 3
|
||||
|
||||
# TS 102 221 Section 11.3.1
|
||||
class RetrieveData(ApduCommand, n='RETRIEVE DATA', ins=0xCB, cla=['8X', 'CX', 'EX']):
|
||||
_apdu_case = 4
|
||||
|
||||
@staticmethod
|
||||
def _tlv_decode_cmd(self : ApduCommand) -> Dict:
|
||||
c = {}
|
||||
if self.p2 & 0xc0 == 0x80:
|
||||
c['mode'] = 'first_block'
|
||||
sfi = self.p2 & 0x1f
|
||||
if sfi == 0:
|
||||
c['file'] = 'currently_selected_ef'
|
||||
else:
|
||||
c['file'] = 'sfi'
|
||||
c['sfi'] = sfi
|
||||
c['tag'] = i2h([self.cmd_data[0]])
|
||||
elif self.p2 & 0xdf == 0x00:
|
||||
c['mode'] = 'next_block'
|
||||
elif self.p2 & 0xdf == 0x40:
|
||||
c['mode'] = 'retransmit_previous_block'
|
||||
else:
|
||||
logger.warning('%s: invalid P2=%02x' % (self, self.p2))
|
||||
return c
|
||||
|
||||
def _decode_cmd(self):
|
||||
return RetrieveData._tlv_decode_cmd(self)
|
||||
|
||||
def _decode_rsp(self):
|
||||
# TODO: parse tag/len/val?
|
||||
return b2h(self.rsp_data)
|
||||
|
||||
|
||||
# TS 102 221 Section 11.3.2
|
||||
class SetData(ApduCommand, n='SET DATA', ins=0xDB, cla=['8X', 'CX', 'EX']):
|
||||
_apdu_case = 3
|
||||
|
||||
def _decode_cmd(self):
|
||||
c = RetrieveData._tlv_decode_cmd(self)
|
||||
if c['mode'] == 'first_block':
|
||||
if len(self.cmd_data) == 0:
|
||||
c['delete'] = True
|
||||
# TODO: parse tag/len/val?
|
||||
c['data'] = b2h(self.cmd_data)
|
||||
return c
|
||||
|
||||
|
||||
# TS 102 221 Section 12.1.1
|
||||
class GetResponse(ApduCommand, n='GET RESPONSE', ins=0xC0, cla=['0X', '4X', '6X']):
|
||||
_apdu_case = 2
|
||||
|
||||
ApduCommands = ApduCommandSet('TS 102 221', cmds=[UiccSelect, UiccStatus, ReadBinary, UpdateBinary, ReadRecord,
|
||||
UpdateRecord, SearchRecord, Increase, VerifyPin, ChangePin, DisablePin,
|
||||
EnablePin, UnblockPin, DeactivateFile, ActivateFile, Authenticate88,
|
||||
Authenticate89, ManageChannel, GetChallenge, TerminalCapability,
|
||||
ManageSecureChannel, TransactData, SuspendUicc, GetIdentity,
|
||||
ExchangeCapabilities, TerminalProfile, Envelope, Fetch, TerminalResponse,
|
||||
RetrieveData, SetData, GetResponse])
|
||||
Reference in New Issue
Block a user