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/* wptCardPCSC.cpp - PC/SC card API interface |
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* Copyright (C) 2003 Timo Schulz |
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* |
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* This file is part of WinPT. |
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* |
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* WinPT is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* WinPT is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with WinPT; if not, write to the Free Software Foundation, |
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
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*/ |
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|
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#include <stdio.h> |
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#include <windows.h> |
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#include <winscard.h> |
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|
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#include "gpgme.h" |
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#include "wptTypes.h" |
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#include "wptCard.h" |
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|
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/* Possible card states. */ |
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enum { |
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CARD_STATE_NONE=0, |
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CARD_STATE_UNAWARE, |
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CARD_STATE_UNAVAIL, |
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CARD_STATE_PRESENT, |
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CARD_STATE_EXCLUSI, |
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CARD_STATE_EMPTY, |
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CARD_STATE_INUSE, |
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CARD_STATE_MUTE |
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}; |
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|
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#define MAX_READERS 8 |
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|
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struct pcsc_reader_s { |
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SCARD_READERSTATE_A reader_states[MAX_READERS]; |
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int nreaders; |
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char * readers[MAX_READERS]; |
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}; |
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typedef struct pcsc_reader_s *pcsc_reader_t; |
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|
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|
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static LONG (WINAPI *pcsc_establish_context) (unsigned long scope, |
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const void *reserved1, |
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const void *reserved2, |
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unsigned long *r_context); |
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static LONG (WINAPI *pcsc_release_context) (unsigned long context); |
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static LONG (WINAPI *pcsc_list_readers) (unsigned long context, |
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const char *groups, |
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char *readers, |
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unsigned long *readerslen); |
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static LONG (WINAPI *pcsc_connect) (unsigned long context, |
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const char *reader, |
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unsigned long share_mode, |
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unsigned long preferred_protocols, |
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unsigned long *r_card, |
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unsigned long *r_active_protocol); |
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static LONG (WINAPI *pcsc_disconnect) (unsigned long card, |
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unsigned long disposition); |
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static LONG (WINAPI *pcsc_status) (unsigned long card, |
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char *reader, unsigned long *readerlen, |
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unsigned long *r_state, unsigned long *r_protocol, |
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unsigned char *atr, unsigned long *atrlen); |
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static LONG (WINAPI *pcsc_get_status_change)(unsigned long ctx, |
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unsigned long timeout, |
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SCARD_READERSTATE * readerstate, |
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unsigned long creaders); |
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|
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static int pcsc_init = 0; |
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|
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|
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#define load_one_fnc(ptr, hlib, name) do { \ |
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a = ptr = (void *)GetProcAddress (hlib, name); \ |
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if (!a) { \ |
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char msg[256]; \ |
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_snprintf (msg, sizeof msg-1, "Could not load '%s'", name); \ |
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MessageBox (NULL, msg, "PC/SC Driver", MB_ICONERROR|MB_OK); \ |
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goto fail; \ |
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} \ |
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} while (0) |
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|
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|
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int |
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pcsc_loadlib (int scard_support) |
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{ |
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HMODULE hlib; |
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FARPROC a; |
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|
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if (!scard_support || pcsc_init) |
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return 0; |
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hlib = LoadLibrary ("WINSCARD"); |
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if (!hlib) |
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goto fail; |
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load_one_fnc (pcsc_establish_context, hlib, "SCardEstablishContext"); |
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load_one_fnc (pcsc_release_context, hlib, "SCardReleaseContext"); |
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load_one_fnc (pcsc_list_readers, hlib, "SCardListReadersA"); |
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load_one_fnc (pcsc_connect, hlib, "SCardConnectA"); |
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load_one_fnc (pcsc_disconnect, hlib, "SCardDisconnect"); |
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load_one_fnc (pcsc_status, hlib, "SCardStatusA"); |
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load_one_fnc (pcsc_get_status_change, hlib, "SCardGetStatusChangeA"); |
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goto success; |
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|
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fail: |
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FreeLibrary (hlib); |
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return -1; |
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success: |
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pcsc_init = 1; |
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FreeLibrary (hlib); |
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return 0; |
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} |
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|
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|
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void |
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pcsc_free_readers (pcsc_reader_t rd) |
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{ |
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int i; |
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|
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if (!rd) |
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return; |
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|
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for (i=0; i < rd->nreaders; i++) |
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safe_free (rd->readers[i]); |
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safe_free (rd); |
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} |
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|
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|
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const char * |
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pcsc_get_reader (pcsc_reader_t rd, int idx, int * ret_nrd) |
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{ |
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if (!rd) |
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return NULL; |
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if (idx == -1 && ret_nrd) { |
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*ret_nrd = rd->nreaders; |
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return NULL; |
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} |
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if (idx >= rd->nreaders) |
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idx=0; |
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return rd->readers[idx]; |
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} |
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|
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|
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int |
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pcsc_scan_readers (pcsc_reader_t * ret_rd) |
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{ |
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pcsc_reader_t rd; |
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SCARDCONTEXT hctx; |
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SCARD_READERSTATE_A rdstat; |
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DWORD readers; |
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LPSTR rdrstr; |
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char * p; |
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int i; |
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int rc, curr_rd=0; |
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|
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*ret_rd = NULL; |
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if (!pcsc_init) |
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return -1; |
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|
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rc = pcsc_establish_context (SCARD_SCOPE_SYSTEM, NULL, NULL, &hctx); |
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if (rc != SCARD_S_SUCCESS) |
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return -1; |
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|
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rc = pcsc_list_readers (hctx, NULL, NULL, &readers); |
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if (rc != SCARD_S_SUCCESS) |
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return -1; |
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|
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rdrstr = malloc (sizeof(char)*readers); |
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if (!rdrstr) |
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BUG (0); |
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|
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rc = pcsc_list_readers (hctx, NULL, rdrstr, &readers); |
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if (rc != SCARD_S_SUCCESS) { |
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safe_free (rdrstr); |
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return -1; |
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} |
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|
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rd = calloc (1, sizeof *rd); |
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if (!rd) |
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BUG (0); |
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|
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p = rdrstr; |
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while ((*p != '\0') && (rd->nreaders < MAX_READERS)) { |
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rd->readers[rd->nreaders] = strdup (p); |
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p += strlen (p)+1; |
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rd->nreaders++; |
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} |
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|
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if (!rd->nreaders) { |
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safe_free (rdrstr); |
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safe_free (rd); |
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return 0; |
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} |
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|
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/* set the initial states */ |
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for (i=0; i<rd->nreaders; i++) { |
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rd->reader_states[i].szReader = rd->readers[i]; |
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rd->reader_states[i].dwCurrentState = SCARD_STATE_EMPTY; |
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} |
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|
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while (1) { |
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rdstat = rd->reader_states[curr_rd]; |
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rc = pcsc_get_status_change (hctx, 0, &rdstat, 1); |
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if (rc == SCARD_E_TIMEOUT) |
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continue; |
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if (rc != SCARD_S_SUCCESS) |
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; |
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|
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/* next reader */ |
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curr_rd++; |
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if (curr_rd >= rd->nreaders) |
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curr_rd = 0; |
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} |
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|
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safe_free (rdrstr); |
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*ret_rd = rd; |
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rc = pcsc_release_context (hctx); |
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if (rc != SCARD_S_SUCCESS) |
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return -1; |
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return 0; |
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} |
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|
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|
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int |
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pcsc_get_card_status (void) |
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{ |
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pcsc_reader_t rd; |
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SCARD_READERSTATE_A rdstat; |
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int rc, stat=0; |
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|
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rc = pcsc_scan_readers (&rd); |
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if (rc) |
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return -1; |
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rdstat = rd->reader_states[0]; |
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if (rdstat.dwCurrentState & SCARD_STATE_UNAVAILABLE) |
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stat |= CARD_STATE_UNAVAIL; |
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if (rdstat.dwCurrentState & SCARD_STATE_EMPTY) |
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stat |= CARD_STATE_EMPTY; |
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if (rdstat.dwCurrentState & SCARD_STATE_INUSE) |
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stat |= CARD_STATE_INUSE; |
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if (rdstat.dwCurrentState & SCARD_STATE_EXCLUSIVE) |
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stat |= CARD_STATE_EXCLUSI; |
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return stat; |
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} |
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