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annotate pcsc/connect.c @ 45:9eb5460f51a6

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main tools: support both pcsc and serial back ends
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 21 Mar 2021 01:56:49 +0000
parents f7a03e53bb2c
children
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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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6 #include <winscard.h>
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7
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8 extern SCARDCONTEXT hContext;
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9 extern char *reader_list;
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10 extern unsigned select_reader_num;
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11
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12 SCARDHANDLE hCard;
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13 char *selected_reader;
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14
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15 select_reader_by_num()
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16 {
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17 char *cp;
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18 unsigned num;
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19
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20 for (cp = reader_list, num = 0; *cp; num++) {
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21 if (num == select_reader_num) {
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22 selected_reader = cp;
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23 return(0);
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24 }
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25 cp += strlen(cp) + 1;
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26 }
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27 fprintf(stderr,
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28 "error: requested reader #%u, but only %u reader(s) found\n",
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29 select_reader_num, num);
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30 SCardReleaseContext(hContext);
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31 exit(1);
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32 }
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33
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34 connect_to_card()
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35 {
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36 LONG rv;
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37 DWORD dwActiveProtocol;
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38
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39 rv = SCardConnect(hContext, selected_reader, SCARD_SHARE_EXCLUSIVE,
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40 SCARD_PROTOCOL_T0, &hCard, &dwActiveProtocol);
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41 if (rv != SCARD_S_SUCCESS) {
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42 fprintf(stderr, "SCardConnect: %s\n", pcsc_stringify_error(rv));
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43 SCardReleaseContext(hContext);
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44 exit(1);
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45 }
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46 return(0);
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47 }