FreeCalypso > hg > fc-pcsc-tools

comparison libcommon/cardconnect.c @ 0:f7145c77b7fb

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starting libcommon: factored out of fc-simtool
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 11 Feb 2021 22:28:45 +0000
parents
children 84d1c31d0fad
comparison
equal deleted inserted replaced
-1:000000000000 0:f7145c77b7fb
1 #include <string.h>
2 #include <strings.h>
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <pcsclite.h>
6 #include <winscard.h>
7
8 SCARDCONTEXT hContext;
9 SCARDHANDLE hCard;
10 char *reader_name_buf;
11
12 setup_pcsc_context()
13 {
14 LONG rv;
15
16 rv = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &hContext);
17 if (rv != SCARD_S_SUCCESS) {
18 fprintf(stderr, "SCardEstablishContext: %s\n",
19 pcsc_stringify_error(rv));
20 exit(1);
21 }
22 return(0);
23 }
24
25 get_reader_name()
26 {
27 LONG rv;
28 DWORD dwReaders;
29
30 rv = SCardListReaders(hContext, NULL, NULL, &dwReaders);
31 if (rv != SCARD_S_SUCCESS) {
32 fprintf(stderr, "SCardListReaders 1st call: %s\n",
33 pcsc_stringify_error(rv));
34 SCardReleaseContext(hContext);
35 exit(1);
36 }
37 if (dwReaders < 1) {
38 fprintf(stderr,
39 "error: dwReaders returned by SCardListReaders() is less than 1\n");
40 SCardReleaseContext(hContext);
41 exit(1);
42 }
43 reader_name_buf = malloc(dwReaders);
44 if (!reader_name_buf) {
45 perror("malloc for readers list");
46 SCardReleaseContext(hContext);
47 exit(1);
48 }
49 reader_name_buf[0] = '\0';
50 rv = SCardListReaders(hContext, NULL, reader_name_buf, &dwReaders);
51 if (rv != SCARD_S_SUCCESS) {
52 fprintf(stderr, "SCardListReaders 2nd call: %s\n",
53 pcsc_stringify_error(rv));
54 SCardReleaseContext(hContext);
55 exit(1);
56 }
57 if (reader_name_buf[0] == '\0') {
58 fprintf(stderr,
59 "error: list returned by SCardListReaders() begins with a NUL byte\n");
60 SCardReleaseContext(hContext);
61 exit(1);
62 }
63 if (!memchr(reader_name_buf, 0, dwReaders)) {
64 fprintf(stderr,
65 "error: list returned by SCardListReaders() does not contain a NUL byte\n");
66 SCardReleaseContext(hContext);
67 exit(1);
68 }
69 return(0);
70 }
71
72 connect_to_card()
73 {
74 LONG rv;
75 DWORD dwActiveProtocol;
76
77 rv = SCardConnect(hContext, reader_name_buf, SCARD_SHARE_EXCLUSIVE,
78 SCARD_PROTOCOL_T0, &hCard, &dwActiveProtocol);
79 if (rv != SCARD_S_SUCCESS) {
80 fprintf(stderr, "SCardConnect: %s\n", pcsc_stringify_error(rv));
81 SCardReleaseContext(hContext);
82 exit(1);
83 }
84 return(0);
85 }