Philipp Maier | a028c7d | 2021-11-08 16:12:03 +0100 | [diff] [blame] | 1 | # -*- coding: utf-8 -*- |
| 2 | |
| 3 | """ pySim: tell old 2G SIMs apart from UICC |
| 4 | """ |
| 5 | |
| 6 | # |
| 7 | # (C) 2021 by Sysmocom s.f.m.c. GmbH |
| 8 | # All Rights Reserved |
| 9 | # |
| 10 | # This program is free software: you can redistribute it and/or modify |
| 11 | # it under the terms of the GNU General Public License as published by |
| 12 | # the Free Software Foundation, either version 2 of the License, or |
| 13 | # (at your option) any later version. |
| 14 | # |
| 15 | # This program is distributed in the hope that it will be useful, |
| 16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | # GNU General Public License for more details. |
| 19 | # |
| 20 | # You should have received a copy of the GNU General Public License |
| 21 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 22 | # |
| 23 | |
| 24 | from pySim.commands import SimCardCommands |
| 25 | from pySim.filesystem import CardApplication, interpret_sw |
| 26 | from pySim.utils import all_subclasses |
| 27 | from typing import Any |
| 28 | import abc |
| 29 | import operator |
| 30 | |
| 31 | def _mf_select_test(scc:SimCardCommands, cla_byte:str, sel_ctrl:str) -> bool: |
| 32 | cla_byte_bak = scc.cla_byte |
| 33 | sel_ctrl_bak = scc.sel_ctrl |
| 34 | scc.reset_card() |
| 35 | |
| 36 | scc.cla_byte = cla_byte |
| 37 | scc.sel_ctrl = sel_ctrl |
| 38 | rc = True |
| 39 | try: |
| 40 | scc.select_file('3f00') |
| 41 | except: |
| 42 | rc = False |
| 43 | |
| 44 | scc.reset_card() |
| 45 | scc.cla_byte = cla_byte_bak |
| 46 | scc.sel_ctrl = sel_ctrl_bak |
| 47 | return rc |
| 48 | |
| 49 | def match_uicc(scc:SimCardCommands) -> bool: |
| 50 | """ Try to access MF via UICC APDUs (3GPP TS 102.221), if this works, the |
| 51 | card is considered a UICC card. |
| 52 | """ |
| 53 | return _mf_select_test(scc, "00", "0004") |
| 54 | |
| 55 | def match_sim(scc:SimCardCommands) -> bool: |
| 56 | """ Try to access MF via 2G APDUs (3GPP TS 11.11), if this works, the card |
| 57 | is also a simcard. This will be the case for most UICC cards, but there may |
| 58 | also be plain UICC cards without 2G support as well. |
| 59 | """ |
| 60 | return _mf_select_test(scc, "a0", "0000") |
| 61 | |
| 62 | class CardProfile(object): |
| 63 | """A Card Profile describes a card, it's filesystem hierarchy, an [initial] list of |
| 64 | applications as well as profile-specific SW and shell commands. Every card has |
| 65 | one card profile, but there may be multiple applications within that profile.""" |
| 66 | |
| 67 | def __init__(self, name, **kw): |
| 68 | """ |
| 69 | Args: |
| 70 | desc (str) : Description |
| 71 | files_in_mf : List of CardEF instances present in MF |
| 72 | applications : List of CardApplications present on card |
| 73 | sw : List of status word definitions |
| 74 | shell_cmdsets : List of cmd2 shell command sets of profile-specific commands |
| 75 | cla : class byte that should be used with cards of this profile |
| 76 | sel_ctrl : selection control bytes class byte that should be used with cards of this profile |
| 77 | """ |
| 78 | self.name = name |
| 79 | self.desc = kw.get("desc", None) |
| 80 | self.files_in_mf = kw.get("files_in_mf", []) |
| 81 | self.sw = kw.get("sw", {}) |
| 82 | self.applications = kw.get("applications", []) |
| 83 | self.shell_cmdsets = kw.get("shell_cmdsets", []) |
| 84 | self.cla = kw.get("cla", "00") |
| 85 | self.sel_ctrl = kw.get("sel_ctrl", "0004") |
| 86 | |
| 87 | def __str__(self): |
| 88 | return self.name |
| 89 | |
| 90 | def add_application(self, app:CardApplication): |
| 91 | """Add an application to a card profile. |
| 92 | |
| 93 | Args: |
| 94 | app : CardApplication instance to be added to profile |
| 95 | """ |
| 96 | self.applications.append(app) |
| 97 | |
| 98 | def interpret_sw(self, sw:str): |
| 99 | """Interpret a given status word within the profile. |
| 100 | |
| 101 | Args: |
| 102 | sw : Status word as string of 4 hex digits |
| 103 | |
| 104 | Returns: |
| 105 | Tuple of two strings |
| 106 | """ |
| 107 | return interpret_sw(self.sw, sw) |
| 108 | |
Philipp Maier | 5998a3a | 2021-11-16 15:16:39 +0100 | [diff] [blame^] | 109 | @staticmethod |
| 110 | def decode_select_response(data_hex:str) -> Any: |
Philipp Maier | a028c7d | 2021-11-08 16:12:03 +0100 | [diff] [blame] | 111 | """Decode the response to a SELECT command. |
| 112 | |
| 113 | This is the fall-back method which doesn't perform any decoding. It mostly |
| 114 | exists so specific derived classes can overload it for actual decoding. |
| 115 | This method is implemented in the profile and is only used when application |
| 116 | specific decoding cannot be performed (no ADF is selected). |
| 117 | |
| 118 | Args: |
| 119 | data_hex: Hex string of the select response |
| 120 | """ |
| 121 | return data_hex |
| 122 | |
| 123 | @staticmethod |
| 124 | @abc.abstractmethod |
| 125 | def match_with_card(scc:SimCardCommands) -> bool: |
| 126 | """Check if the specific profile matches the card. This method is a |
| 127 | placeholder that is overloaded by specific dirived classes. The method |
| 128 | actively probes the card to make sure the profile class matches the |
| 129 | physical card. This usually also means that the card is reset during |
| 130 | the process, so this method must not be called at random times. It may |
| 131 | only be called on startup. |
| 132 | |
| 133 | Args: |
| 134 | scc: SimCardCommands class |
| 135 | Returns: |
| 136 | match = True, no match = False |
| 137 | """ |
| 138 | return False |
| 139 | |
| 140 | @staticmethod |
| 141 | def pick(scc:SimCardCommands): |
| 142 | profiles = list(all_subclasses(CardProfile)) |
| 143 | profiles.sort(key=operator.attrgetter('ORDER')) |
| 144 | |
| 145 | for p in profiles: |
| 146 | if p.match_with_card(scc): |
| 147 | return p() |
| 148 | |
| 149 | return None |