APDU Library - Java

This library offers utilities to encode and decode APDU objects as well as their responses.

In smart card applications, a host typically sends binary APDU data to a secure element and reads back a response. This binary data may be somewhat difficult to create and understand depending on the length of the data, etc. This library can be used to work with APDU’s in a more generic and structured way.

To know more on the functions supported by this library, please check the API documentation. The API documentation can be generated using gradle javadoc command and documentation can be found in build/docs/index.html.

Example

1. Include headers

   import com.infineon.hsw.apdu.ApduException;
   import com.infineon.hsw.apdu.ApduResponse;
   import com.infineon.hsw.apdu.ApduCommand;
   import com.infineon.hsw.apdu.ApduCommandSet;
   import com.infineon.hsw.apdu.ApduChannel;
   

2. Build a C-APDU and send it via the initialised channel and and receive the R-APDU. R-APDU is parsed and its status word (SW) is extracted

   static final byte CLA = (byte)0x00;
   static final byte INS = (byte)0xA4;
   static final byte P1 = (byte)0x04;
   static final byte P2 = (byte)0x00;
   static final byte LC = (byte)0x07;
   static final byte LE = (byte)0x00;
   static final byte[] AID = { (byte) 0xD2, (byte) 0x76, (byte) 0x00,(byte) 0x00, (byte) 0x85, (byte) 0x01,(byte) 0x01 };
   
   ApduCommand selectCmd = new ApduCommand(CLA, INS_SELECT, P1, P2, AID, LE);
   // Initialize the APDU channel with communication channel (For example, PCSC )
   ApduChannel apduChannel = new ApduChannel(channel);
   ApduCommandSet commandSet = new ApduCommandSet(apduChannel, 0);
   apduChannel.connect();
   ApduResponse apduResponse;
   apduResponse = commandSet.send();
   apduResponse.checkStatus();
   apduResponse.getSW();