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/*************************************************************************** $RCSfile$ ------------------- cvs : $Id: tutorial2.c 167 2006-03-06 23:26:16Z aquamaniac $ begin : Mon Mar 01 2004 copyright : (C) 2004 by Martin Preuss email : martin@libchipcard.de *************************************************************************** * Please see toplevel file COPYING for license details * ***************************************************************************/ #ifdef HAVE_CONFIG_H # include <config.h> #endif #undef BUILDING_LIBCHIPCARD2_DLL #include <chipcard2/chipcard2.h> #include <chipcard2-client/client/client.h> #include <chipcard2-client/cards/kvkcard.h> /* * While tutorial1 only works with base classes we are now to understand how * more complex card classes can be used. * This tutorial waits for a German medical card to be inserted, reads the * information stored on the card and prints it to the standard output * channel. * * The only parts which differ a marked below by lines of equation marks, * the rest is pretty much the same as in the other tutorials. * * Usage: * tutorial2 */ /* This function explains an error */ void showError(LC_CARD *card, LC_CLIENT_RESULT res, const char *failedCommand) { const char *s; switch(res) { case LC_Client_ResultOk: s="Ok."; break; case LC_Client_ResultWait: s="Timeout."; break; case LC_Client_ResultIpcError: s="IPC error."; break; case LC_Client_ResultCmdError: s="Command error."; break; case LC_Client_ResultDataError: s="Data error."; break; case LC_Client_ResultAborted: s="Aborted."; break; case LC_Client_ResultInvalid: s="Invalid argument to command."; break; case LC_Client_ResultInternal: s="Internal error."; break; case LC_Client_ResultGeneric: s="Generic error."; break; default: s="Unknown error."; break; } fprintf(stderr, "Error in \"%s\": %s\n", failedCommand, s); if (res==LC_Client_ResultCmdError) { int sw1; int sw2; sw1=LC_Card_GetLastSW1(card); sw2=LC_Card_GetLastSW2(card); fprintf(stderr, " Last card command result:\n"); if (sw1!=-1 && sw2!=-1) fprintf(stderr, " SW1=%02x, SW2=%02x\n", sw1, sw2); s=LC_Card_GetLastResult(card); if (s) fprintf(stderr, " Result: %s\n", s); s=LC_Card_GetLastText(card); if (s) fprintf(stderr, " Text : %s\n", s); } } int main(int argc, char **argv) { LC_CLIENT *cl; LC_CARD *card=0; LC_CLIENT_RESULT res; int rv; GWEN_DB_NODE *dbData; cl=LC_Client_new("tutorial2", "1.0", 0); if (LC_Client_ReadConfigFile(cl, 0)){ fprintf(stderr, "ERROR: Error reading configuration.\n"); LC_Client_free(cl); return 1; } fprintf(stderr, "INFO: Connecting to server.\n"); res=LC_Client_StartWait(cl, 0, 0); if (res!=LC_Client_ResultOk) { showError(card, res, "StartWait"); return 2; } fprintf(stderr, "Please insert a German medical card.\n"); card=LC_Client_WaitForNextCard(cl, 30); if (!card) { fprintf(stderr, "ERROR: No card found.\n"); LC_Client_StopWait(cl); return 2; } /* stop waiting */ fprintf(stderr, "INFO: Telling the server that we need no more cards.\n"); res=LC_Client_StopWait(cl); if (res!=LC_Client_ResultOk) { showError(card, res, "StopWait"); return 2; } /* ====================================================================== * Until now we only handled basic card functions as the other tutorials * did. * The inserted card is supposed to be a German medical card, so we need * to tell Libchipcard2 that we want to use it as such. This makes sure that * the correct card commands for the reader/card combination is used * internally. * The following function also sets more specific functions for the complex * card type to be called internally upon LC_Card_Open() and * LC_Card_Close(), so we need to call the _ExtendCard() function before * the function LC_Card_Open() ! * The specific open() function for a German medical card for example reads * the known fields from the card. * This function seldomly fails, however, you should always be prepared * that it could. * * If you later want to use the card as a memory card you can just * unextend the card (LC_KVKCard_UnextendCard()) and then extend it as * a memory card, like in: * LC_KVKCard_UnextentCard(card); * LC_MemoryCard_ExtendCard(card); * Please always remember to unextend an extended card before extending it * as a different type. * * By the way: Since a German medical card basically is a memory card you * would in this case not need to unextend it, since internally the function * LC_KVKCard_ExtendCard() also extends it as such. * * This is a fine example of the heritage model used in Libchipcard2: * You could also create your own card type by extending an existing one. */ rv=LC_KVKCard_ExtendCard(card); if (rv) { fprintf(stderr, "Could not extend card as German medical card\n"); return 2; } /* open card */ fprintf(stderr, "INFO: Opening card.\n"); res=LC_Card_Open(card); if (res!=LC_Client_ResultOk) { fprintf(stderr, "ERROR: Error executing command CardOpen (%d).\n", res); return 2; } /* Since the card has been extended as a German medical card we can now * use the functions of that module. * In this case we retrieve the user information stored on the card. * Please note that there is no data if the card is corrupted (e.g. a bad * checksum). */ dbData=LC_KVKCard_GetCardData(card); if (!dbData) { fprintf(stderr, "ERROR: No card data available.\n"); LC_Card_Close(card); return 2; } /* The data returned is stored in a GWEN_DB which we now present to the * user (see the API documentation in Gwenhywfar for a description of * a GWEN_DB, search for GWEN_DB_NODE). */ fprintf(stderr, "INFO: I got this card:\n"); GWEN_DB_Dump(dbData, stderr, 2); /* ====================================================================== */ /* close card */ fprintf(stderr, "INFO: Closing card.\n"); res=LC_Card_Close(card); if (res!=LC_Client_ResultOk) { showError(card, res, "CardClose"); LC_Card_free(card); return 2; } fprintf(stderr, "INFO: Card closed.\n"); /* cleanup */ LC_Card_free(card); LC_Client_free(cl); return 0; }
1.5.3