FreeCalypso > hg > fc-pcsc-tools
annotate doc/Low-level-commands @ 75:f661ad7eb126
doc/Low-level-commands: document started
| author | Mychaela Falconia <falcon@freecalypso.org> |
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| date | Tue, 16 Feb 2021 15:35:05 +0000 |
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| children | 5f3b16fd4321 |
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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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3 commands, these low-level commands can be used to do everything that the SIM |
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4 protocol allows, and all higher-level commands merely provide user-friendly |
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5 utilities for the most common particular use cases. This document describes |
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6 these low-level commands. Readers of this document are expected to know the |
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7 SIM interface protocol as defined in GSM TS 11.11 and its successor 3GPP TS |
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8 51.011. |
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9 |
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10 Exploring and reading commands |
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11 ============================== |
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12 |
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13 atr |
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14 |
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15 This command displays the ATR (Answer To Reset) byte string which the SIM sent |
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16 to the reader when it powered up. |
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17 |
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18 select File_ID |
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19 |
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20 This fc-simtool command sends a SELECT command to the SIM, follows up with a |
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21 GET RESPONSE command as expected in the T=0 protocol, and provides some human- |
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22 readable parsing of the most important fields in the SIM response structure. |
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23 If a correctly formed response was received from the SIM and this response |
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24 structure indicates that a record-based EF has been selected, the indicated |
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25 record length is saved in an internal variable used by readrec and update-rec |
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26 commands. |
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27 |
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28 The file ID can be specified either in hexadecimal (exactly 4 hex digits, *no* |
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29 0x prefix) or as a symbolic name. fc-simtool knows the following symbolic |
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30 names: |
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31 |
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32 * MF |
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33 * DF_GSM, DF_DCS1800 and DF_TELECOM |
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34 * "gsm" and "telecom" as shorthand names for DF_GSM and DF_TELECOM |
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35 * Some of the most classic EFs, but not all |
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36 |
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37 Important note: regardless of whether you specify the file ID in raw hex or |
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38 symbolically, this low-level select command will send only one SELECT command |
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39 to the SIM. Per the SIM protocol, in order to successfully select an EF, you |
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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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41 as appropriate before the EF of interest. Our low-level select command does |
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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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43 use symbolic names for EFs. |
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44 |
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45 sim-resp |
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46 |
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47 This command displays in raw hex the content of the internal buffer that holds |
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48 the last response received from the SIM. This internal buffer is filled by the |
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49 GET RESPONSE command that follows up after SELECT or RUN GSM ALGORITHM, and by |
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50 the READ BINARY or READ RECORD commands, whether they are invoked directly as |
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51 low-level commands (select, readbin, readrec or a38) or internally as part of |
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52 higher-level fc-simtool commands. |
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53 |
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54 readbin offset len |
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55 readrec record-index [len] |
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56 |
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57 readef |
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58 savebin |
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59 |
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60 Writing commands |
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61 ================ |
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62 |
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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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67 restore-file |
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68 |
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69 GSM authentication testing |
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70 ========================== |
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71 |
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72 a38 |
