FreeCalypso > hg > fc-pcsc-tools

annotate libcommon/cardconnect.c @ 15:5390dce9faa4

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simtool/readcmd.c: missed #include <ctype.h>
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 12 Feb 2021 01:36:18 +0000
parents f7145c77b7fb
children 84d1c31d0fad
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f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
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1 #include <string.h>
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2 #include <strings.h>
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3 #include <stdio.h>
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4 #include <stdlib.h>
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5 #include <pcsclite.h>
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Mychaela Falconia <falcon@freecalypso.org>
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6 #include <winscard.h>
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7
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Mychaela Falconia <falcon@freecalypso.org>
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8 SCARDCONTEXT hContext;
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9 SCARDHANDLE hCard;
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10 char *reader_name_buf;
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11
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Mychaela Falconia <falcon@freecalypso.org>
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12 setup_pcsc_context()
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13 {
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14 LONG rv;
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15
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16 rv = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &hContext);
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17 if (rv != SCARD_S_SUCCESS) {
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18 fprintf(stderr, "SCardEstablishContext: %s\n",
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19 pcsc_stringify_error(rv));
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20 exit(1);
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21 }
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22 return(0);
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23 }
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24
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25 get_reader_name()
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26 {
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Mychaela Falconia <falcon@freecalypso.org>
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27 LONG rv;
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Mychaela Falconia <falcon@freecalypso.org>
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28 DWORD dwReaders;
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29
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30 rv = SCardListReaders(hContext, NULL, NULL, &dwReaders);
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31 if (rv != SCARD_S_SUCCESS) {
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32 fprintf(stderr, "SCardListReaders 1st call: %s\n",
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Mychaela Falconia <falcon@freecalypso.org>
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33 pcsc_stringify_error(rv));
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34 SCardReleaseContext(hContext);
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35 exit(1);
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36 }
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Mychaela Falconia <falcon@freecalypso.org>
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37 if (dwReaders < 1) {
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38 fprintf(stderr,
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39 "error: dwReaders returned by SCardListReaders() is less than 1\n");
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40 SCardReleaseContext(hContext);
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41 exit(1);
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42 }
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43 reader_name_buf = malloc(dwReaders);
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44 if (!reader_name_buf) {
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45 perror("malloc for readers list");
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46 SCardReleaseContext(hContext);
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47 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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48 }
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49 reader_name_buf[0] = '\0';
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50 rv = SCardListReaders(hContext, NULL, reader_name_buf, &dwReaders);
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51 if (rv != SCARD_S_SUCCESS) {
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52 fprintf(stderr, "SCardListReaders 2nd call: %s\n",
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53 pcsc_stringify_error(rv));
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54 SCardReleaseContext(hContext);
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55 exit(1);
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56 }
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57 if (reader_name_buf[0] == '\0') {
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58 fprintf(stderr,
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59 "error: list returned by SCardListReaders() begins with a NUL byte\n");
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60 SCardReleaseContext(hContext);
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61 exit(1);
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62 }
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63 if (!memchr(reader_name_buf, 0, dwReaders)) {
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64 fprintf(stderr,
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65 "error: list returned by SCardListReaders() does not contain a NUL byte\n");
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66 SCardReleaseContext(hContext);
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67 exit(1);
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68 }
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69 return(0);
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70 }
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71
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72 connect_to_card()
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73 {
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74 LONG rv;
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75 DWORD dwActiveProtocol;
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76
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77 rv = SCardConnect(hContext, reader_name_buf, SCARD_SHARE_EXCLUSIVE,
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78 SCARD_PROTOCOL_T0, &hCard, &dwActiveProtocol);
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79 if (rv != SCARD_S_SUCCESS) {
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80 fprintf(stderr, "SCardConnect: %s\n", pcsc_stringify_error(rv));
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81 SCardReleaseContext(hContext);
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82 exit(1);
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83 }
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84 return(0);
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85 }