Dart

PC/SC Find Inserted Smart Cards

See more SCard Examples

Get detailed information about each reader including whether or not a smart card is currently inserted in the reader. (Also includes USB tokens.)

Note: This functionality was introduced in Chilkat v9.5.0.87.

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final scard = CkSCard();

  // First establish a context to the PC/SC Resource Manager
  try {
    scard.establishContext('user');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Get JSON containing information about the smartcards currently inserted into readers.
  // This also includes information about USB security tokens.
  final json = CkJsonObject();
  try {
    scard.findSmartcards(json);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  json.emitCompact = false;
  print(json.emit());

  // Here is sample output:
  // See below for sample code to parse the JSON.

  // You can see which readers have a card inserted by the "state".
  // If the state contains "present", then a card is inserted into the reader.
  // (USB tokens will typically always have a state containing "present")
  // Also, the ATR of the card inserted into the reader is indicated by "atr".

  // {
  //   "reader": [
  //     {
  //       "name": "Alcor Micro USB Smart Card Reader 0",
  //       "state": "present,inuse",
  //       "vendorName": "Alcor Micro",
  //       "systemName": "Alcor Micro USB Smart Card Reader 0",
  //       "card": {
  //         "atr": "3B7F96000080318065B0855956FB120FFE829000",
  //         "windows": {
  //           "miniDriver": "AxaltoCM.dll",
  //           "cryptoProvider": "Microsoft Base Smart Card Crypto Provider",
  //           "keyStorageProvider": "Microsoft Smart Card Key Storage Provider"
  //         }
  //       }
  //     },
  //     {
  //       "name": "FS USB Token 0",
  //       "state": "present,inuse",
  //       "vendorName": "FS",
  //       "serialNumber": "3F",
  //       "systemName": "FS USB Token 0",
  //       "card": {
  //         "atr": "3B9F958131FE9F006646530534002571DF000000000012",
  //         "windows": {
  //           "miniDriver": "eps2003csp11",
  //           "cryptoProvider": "Microsoft Base Smart Card Crypto Provider",
  //           "keyStorageProvider": "Microsoft Smart Card Key Storage Provider"
  //         }
  //       }
  //     },
  //     {
  //       "name": "FT Java Token 0",
  //       "state": "present",
  //       "vendorName": "FT",
  //       "serialNumber": "3F",
  //       "systemName": "FT Java Token 0",
  //       "card": {
  //         "atr": "3BFC180000813180459067464A00642D70C172FEE0FE",
  //         "windows": {
  //           "miniDriver": "tagliov70px.dll",
  //           "cryptoProvider": "Microsoft Base Smart Card Crypto Provider",
  //           "keyStorageProvider": "Microsoft Smart Card Key Storage Provider"
  //         }
  //       }
  //     },
  //     {
  //       "name": "SCM Microsystems Inc. SCR33x USB Smart Card Reader 0",
  //       "state": "present",
  //       "vendorName": "SCM Microsystems Inc.",
  //       "serialNumber": "333130303330",
  //       "systemName": "SCM Microsystems Inc. SCR33x USB Smart Card Reader 0",
  //       "card": {
  //         "atr": "3BFC180000813180459067464A00641606F2727E00E0",
  //         "windows": {
  //           "miniDriver": "tagliov70px.dll",
  //           "cryptoProvider": "Microsoft Base Smart Card Crypto Provider",
  //           "keyStorageProvider": "Microsoft Smart Card Key Storage Provider"
  //         }
  //       }
  //     },
  //     {
  //       "name": "Yubico YubiKey OTP+FIDO+CCID 0",
  //       "state": "present",
  //       "vendorName": "Yubico",
  //       "serialNumber": "3F",
  //       "systemName": "Yubico YubiKey OTP+FIDO+CCID 0",
  //       "card": {
  //         "atr": "3BFD1300008131FE158073C021C057597562694B657940",
  //         "windows": {
  //           "miniDriver": "msclmd.dll",
  //           "cryptoProvider": "Microsoft Base Smart Card Crypto Provider",
  //           "keyStorageProvider": "Microsoft Smart Card Key Storage Provider"
  //         }
  //       }
  //     }
  //   ]
  // }

  // Use this online tool to generate parsing code from sample JSON: 
  // Generate Parsing Code from JSON

  var name = '';
  var state = '';
  var vendorName = '';
  var systemName = '';
  var cardAtr = '';
  var cardWindowsMiniDriver = '';
  var cardWindowsCryptoProvider = '';
  var cardWindowsKeyStorageProvider = '';
  var serialNumber = '';

  var i = 0;
  final countI = json.sizeOfArray('reader');
  while (i < countI) {
    json.i = i;
    name = json.stringOf('reader[i].name');
    state = json.stringOf('reader[i].state');
    vendorName = json.stringOf('reader[i].vendorName');
    systemName = json.stringOf('reader[i].systemName');
    cardAtr = json.stringOf('reader[i].card.atr');
    cardWindowsMiniDriver = json.stringOf('reader[i].card.windows.miniDriver');
    cardWindowsCryptoProvider = json.stringOf('reader[i].card.windows.cryptoProvider');
    cardWindowsKeyStorageProvider = json.stringOf('reader[i].card.windows.keyStorageProvider');
    serialNumber = json.stringOf('reader[i].serialNumber');
    i++;
  }

  // Applications should always release the context when finished.
  try {
    scard.releaseContext();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
  }
}