Java

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.

Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

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

    CkSCard scard = new CkSCard();

    //  First establish a context to the PC/SC Resource Manager
    success = scard.EstablishContext("user");
    if (success == false) {
        System.out.println(scard.lastErrorText());
        return;
        }

    //  Get JSON containing information about the smartcards currently inserted into readers.
    //  This also includes information about USB security tokens.
    CkJsonObject json = new CkJsonObject();
    success = scard.FindSmartcards(json);
    if (success == false) {
        System.out.println(scard.lastErrorText());
        return;
        }

    json.put_EmitCompact(false);
    System.out.println(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

    String name;
    String state;
    String vendorName;
    String systemName;
    String cardAtr;
    String cardWindowsMiniDriver;
    String cardWindowsCryptoProvider;
    String cardWindowsKeyStorageProvider;
    String serialNumber;

    int i = 0;
    int count_i = json.SizeOfArray("reader");
    while (i < count_i) {
        json.put_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 = i+1;
        }

    //  Applications should always release the context when finished.
    success = scard.ReleaseContext();
    if (success == false) {
        System.out.println(scard.lastErrorText());
        }
  }
}