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doc/Low-level-commands: document started
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 16 Feb 2021 15:35:05 +0000
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children 5f3b16fd4321
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f661ad7eb126 doc/Low-level-commands: document started
Mychaela Falconia <falcon@freecalypso.org>
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1 fc-simtool is a tool built from the bottom up: at the foundation there is a set
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Mychaela Falconia <falcon@freecalypso.org>
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2 of low-level commands that provide raw access to the actual SIM protocol APDU
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Mychaela Falconia <falcon@freecalypso.org>
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3 commands, these low-level commands can be used to do everything that the SIM
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Mychaela Falconia <falcon@freecalypso.org>
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4 protocol allows, and all higher-level commands merely provide user-friendly
f661ad7eb126 doc/Low-level-commands: document started
Mychaela Falconia <falcon@freecalypso.org>
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5 utilities for the most common particular use cases. This document describes
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Mychaela Falconia <falcon@freecalypso.org>
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6 these low-level commands. Readers of this document are expected to know the
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Mychaela Falconia <falcon@freecalypso.org>
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7 SIM interface protocol as defined in GSM TS 11.11 and its successor 3GPP TS
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Mychaela Falconia <falcon@freecalypso.org>
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8 51.011.
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9
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Mychaela Falconia <falcon@freecalypso.org>
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10 Exploring and reading commands
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Mychaela Falconia <falcon@freecalypso.org>
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11 ==============================
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Mychaela Falconia <falcon@freecalypso.org>
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12
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Mychaela Falconia <falcon@freecalypso.org>
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13 atr
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14
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Mychaela Falconia <falcon@freecalypso.org>
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15 This command displays the ATR (Answer To Reset) byte string which the SIM sent
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Mychaela Falconia <falcon@freecalypso.org>
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16 to the reader when it powered up.
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17
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Mychaela Falconia <falcon@freecalypso.org>
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18 select File_ID
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Mychaela Falconia <falcon@freecalypso.org>
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19
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Mychaela Falconia <falcon@freecalypso.org>
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20 This fc-simtool command sends a SELECT command to the SIM, follows up with a
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Mychaela Falconia <falcon@freecalypso.org>
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21 GET RESPONSE command as expected in the T=0 protocol, and provides some human-
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Mychaela Falconia <falcon@freecalypso.org>
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22 readable parsing of the most important fields in the SIM response structure.
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Mychaela Falconia <falcon@freecalypso.org>
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23 If a correctly formed response was received from the SIM and this response
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Mychaela Falconia <falcon@freecalypso.org>
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24 structure indicates that a record-based EF has been selected, the indicated
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Mychaela Falconia <falcon@freecalypso.org>
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25 record length is saved in an internal variable used by readrec and update-rec
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Mychaela Falconia <falcon@freecalypso.org>
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26 commands.
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27
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Mychaela Falconia <falcon@freecalypso.org>
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28 The file ID can be specified either in hexadecimal (exactly 4 hex digits, *no*
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Mychaela Falconia <falcon@freecalypso.org>
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29 0x prefix) or as a symbolic name. fc-simtool knows the following symbolic
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Mychaela Falconia <falcon@freecalypso.org>
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30 names:
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31
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Mychaela Falconia <falcon@freecalypso.org>
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32 * MF
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Mychaela Falconia <falcon@freecalypso.org>
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33 * DF_GSM, DF_DCS1800 and DF_TELECOM
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Mychaela Falconia <falcon@freecalypso.org>
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34 * "gsm" and "telecom" as shorthand names for DF_GSM and DF_TELECOM
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Mychaela Falconia <falcon@freecalypso.org>
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35 * Some of the most classic EFs, but not all
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36
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Mychaela Falconia <falcon@freecalypso.org>
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37 Important note: regardless of whether you specify the file ID in raw hex or
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Mychaela Falconia <falcon@freecalypso.org>
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38 symbolically, this low-level select command will send only one SELECT command
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Mychaela Falconia <falcon@freecalypso.org>
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39 to the SIM. Per the SIM protocol, in order to successfully select an EF, you
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Mychaela Falconia <falcon@freecalypso.org>
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40 have to be in the right directory first, i.e., select MF, DF_GSM or DF_TELECOM
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Mychaela Falconia <falcon@freecalypso.org>
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41 as appropriate before the EF of interest. Our low-level select command does
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Mychaela Falconia <falcon@freecalypso.org>
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42 NOT do this extra step on its own, you have to do it explicitly, even if you
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Mychaela Falconia <falcon@freecalypso.org>
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43 use symbolic names for EFs.
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44
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Mychaela Falconia <falcon@freecalypso.org>
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45 sim-resp
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46
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Mychaela Falconia <falcon@freecalypso.org>
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47 This command displays in raw hex the content of the internal buffer that holds
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Mychaela Falconia <falcon@freecalypso.org>
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48 the last response received from the SIM. This internal buffer is filled by the
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Mychaela Falconia <falcon@freecalypso.org>
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49 GET RESPONSE command that follows up after SELECT or RUN GSM ALGORITHM, and by
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Mychaela Falconia <falcon@freecalypso.org>
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50 the READ BINARY or READ RECORD commands, whether they are invoked directly as
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Mychaela Falconia <falcon@freecalypso.org>
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51 low-level commands (select, readbin, readrec or a38) or internally as part of
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Mychaela Falconia <falcon@freecalypso.org>
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52 higher-level fc-simtool commands.
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53
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Mychaela Falconia <falcon@freecalypso.org>
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54 readbin offset len
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Mychaela Falconia <falcon@freecalypso.org>
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55 readrec record-index [len]
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56
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Mychaela Falconia <falcon@freecalypso.org>
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57 readef
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Mychaela Falconia <falcon@freecalypso.org>
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58 savebin
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59
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Mychaela Falconia <falcon@freecalypso.org>
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60 Writing commands
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61 ================
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62
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Mychaela Falconia <falcon@freecalypso.org>
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63 update-bin
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64 update-bin-imm
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65 update-rec
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66
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Mychaela Falconia <falcon@freecalypso.org>
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67 restore-file
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68
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Mychaela Falconia <falcon@freecalypso.org>
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69 GSM authentication testing
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70 ==========================
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71
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72 a38