[Pcsclite-muscle] Dual Interface Reader

[Dennis Rieks]

Hello,

it is possible to disable the contactless switch off using SCardControl 
with escape command 0x9C 0x01. The setting is active as long as the 
reader is turned on.

Greetings
Dennis

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winscard.h>
#include <reader.h>

#define IOCTL_CCID_ESCAPE SCARD_CTL_CODE(0xDAC)
unsigned const char CNTLESS_SWITCH_RF_ON_OFF[] = {0x9C, 0x01};

#define PCSC_ERROR_EXIT(rv, text) \
if (rv != SCARD_S_SUCCESS) { \
     printf(text ": %s (0x%lX)\n", pcsc_stringify_error(rv), rv); \
     return 1; \
}

int main(int argc, char *argv[]) {
     LONG rv;
     SCARDCONTEXT hContext;
     DWORD dwReaders;
     LPSTR mszReaders = NULL;
     char *ptr;
     SCARDHANDLE hCard;
     DWORD dwActiveProtocol;

     rv = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &hContext);
     PCSC_ERROR_EXIT(rv, "SCardEstablishContext");
     rv = SCardListReaders(hContext, NULL, NULL, &dwReaders);
     PCSC_ERROR_EXIT(rv, "SCardListReaders")
     mszReaders = malloc(sizeof(char) * dwReaders);
     if (mszReaders == NULL) {
         printf("malloc: not enough memory\n");
         return 1;
     }
     rv = SCardListReaders(hContext, NULL, mszReaders, &dwReaders);
     PCSC_ERROR_EXIT(rv, "SCardListReaders")
     ptr = mszReaders;
     while (*ptr != '\0') {
         rv = SCardConnect(hContext, ptr, SCARD_SHARE_DIRECT,
                           SCARD_PROTOCOL_UNDEFINED, &hCard, 
&dwActiveProtocol);
         PCSC_ERROR_EXIT(rv, "SCardConnect")
         rv = SCardControl(hCard, IOCTL_CCID_ESCAPE, 
CNTLESS_SWITCH_RF_ON_OFF, sizeof(CNTLESS_SWITCH_RF_ON_OFF),
                           NULL, 0, NULL);
         if (rv == SCARD_S_SUCCESS) {
             printf("successfully set CNTLESS_SWITCH_RF_ON_OFF for 
reader '%s'\n", ptr);
             return 0;
         }
         ptr += strlen(ptr) + 1;
     }
     printf("No reader found\n");
     return 1;
}


-- 
Dennis Rieks

agido GmbH
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