JavaCard OS

Code: Select all

import javacard.framework.*;
import javacard.security.*;
import javacardx.crypto.*;

public class ECDSA extends Applet
{
   private byte[] plaintext ;
    private ECPrivateKey  objECDSAPriKey=null;    // Object for ECDSA Private Key
    private ECPublicKey   key=null;               // Object for ECDSA Public Key
    private KeyPair       objECDSAKeyPair=null;   // Object for ECDSA Key Pair
    private Signature     objECDSASign=null; 
    
    final static short  BAS  =  0; 
   
   private final static byte[] fp = new byte[] { 
        (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, 
        (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, 
        (byte)0xFF, (byte)0xFE, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, 
        (byte)0xFF, (byte)0xFF, (byte)0xFF };
    private final static byte[] r = new byte[] {
        (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, 
        (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0x99, (byte)0xDE, 
        (byte)0xF8, (byte)0x36, (byte)0x14, (byte)0x6B, (byte)0xC9, (byte)0xB1, (byte)0xB4, 
        (byte)0xD2, (byte)0x28, (byte)0x31 };
    private final static byte[] a = new byte[] {
        (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, 
        (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, 
        (byte)0xFF, (byte)0xFE, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, 
        (byte)0xFF, (byte)0xFF, (byte)0xFC };
    private final static byte[] b = new byte[] {
        (byte)0x64, (byte)0x21, (byte)0x05, (byte)0x19, (byte)0xE5, (byte)0x9C, (byte)0x80, 
        (byte)0xE7, (byte)0x0F, (byte)0xA7, (byte)0xE9, (byte)0xAB, (byte)0x72, (byte)0x24, 
        (byte)0x30, (byte)0x49, (byte)0xFE, (byte)0xB8, (byte)0xDE, (byte)0xEC, (byte)0xC1, 
        (byte)0x46, (byte)0xB9, (byte)0xB1 };
    private final static byte[] g = new byte[] {
        (byte)0x04, (byte)0x18, (byte)0x8D, (byte)0xA8, (byte)0x0E, (byte)0xB0, (byte)0x30, 
        (byte)0x90, (byte)0xF6, (byte)0x7C, (byte)0xBF, (byte)0x20, (byte)0xEB, (byte)0x43, 
        (byte)0xA1, (byte)0x88, (byte)0x00, (byte)0xF4, (byte)0xFF, (byte)0x0A, (byte)0xFD, 
        (byte)0x82, (byte)0xFF, (byte)0x10, (byte)0x12, (byte)0x07, (byte)0x19, (byte)0x2B, 
        (byte)0x95, (byte)0xFF, (byte)0xC8, (byte)0xDA, (byte)0x78, (byte)0x63, (byte)0x10, 
        (byte)0x11, (byte)0xED, (byte)0x6B, (byte)0x24, (byte)0xCD, (byte)0xD5, (byte)0x73, 
        (byte)0xF9, (byte)0x77, (byte)0xA1, (byte)0x1E, (byte)0x79, (byte)0x48, (byte)0x11 }; //49
     private final static short k = 1;    
     
    public static void install(byte[] bArray, short bOffset, byte bLength){
    new ECDSA(bArray, bOffset, bLength);
    }
    
    private ECDSA(byte bArray[], short bOffset, byte bLength){    

    plaintext = new byte[0x50] ;         

    Util.arrayFillNonAtomic(plaintext, BAS, (short)0x50, (byte)0);

    register();
    }
     
    public void process(APDU apdu){
    byte buf[] = apdu.getBuffer();
     
     switch(buf[1])
    {
        case (byte)0xA4:
           break;
           
       case (byte)0x46:
         
     objECDSAPriKey = (ECPrivateKey)KeyBuilder.buildKey(KeyBuilder.TYPE_EC_FP_PRIVATE, KeyBuilder.LENGTH_EC_FP_192, false);
      //ISOException.throwIt((short)0x8888);       
      key = (ECPublicKey)KeyBuilder.buildKey(KeyBuilder.TYPE_EC_FP_PUBLIC,  KeyBuilder.LENGTH_EC_FP_192, false);
        
        key.setFieldFP(fp, (short)0, (short)fp.length);
        key.setR(r, (short)0, (short)r.length);
        key.setA(a, (short)0, (short)a.length);
        key.setB(b, (short)0, (short)b.length);
        key.setG(g, (short)0, (short)g.length);
        key.setK(k);
        
     objECDSAKeyPair = new KeyPair(KeyPair.ALG_EC_FP, KeyBuilder.LENGTH_EC_FP_192);

    // On-Card Key Generation Process
      objECDSAKeyPair.genKeyPair();

     // Obtain Key References
      objECDSAPriKey = (ECPrivateKey)objECDSAKeyPair.getPrivate();
      key = (ECPublicKey)objECDSAKeyPair.getPublic();  

     // Create Signature Object
      objECDSASign = Signature.getInstance(Signature.ALG_ECDSA_SHA, false);
      
      break;
      
       case (byte)0x2E:   
          
              short   sSignLen = 0;
            short   Le = apdu.setOutgoing();   
                   
            // Init with Private Key
            objECDSASign.init(objECDSAPriKey, Signature.MODE_SIGN);
          
           // Sign Data
           sSignLen = objECDSASign.sign(plaintext, BAS, Le, buf, BAS); //(byte[], short, short, byte[])
                 
            apdu.setOutgoingLength(sSignLen);
            apdu.sendBytes(BAS, sSignLen);
            
     default:
            ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
    }

    return; 
    }
}

Code: Select all

       case (byte)0x2E:
         // Normally, the APDU buffer size is 261, so this method can receive data to most 255 bytes;
         short dataLen = apdu.setIncomingAndReceive();

         // Init with Private Key
         objECDSASign.init(objECDSAPriKey, Signature.MODE_SIGN);

         // Sign Data
         // Input data is in the APDU buffer;
         // And the APDU buffer can be used as output buffer;
         short sSignLen = objECDSASign.sign(buf, BAS, (short) (buf[ISO7816.OFFSET_LC] & 0xFF), buf, BAS); //(byte[], short, short, byte[])
         
         // Sent signature result data;
         apdu.setOutgoingAndSend((short) 0, sSignLen);
         
         // Break at the end of each INS;
         break;
     default:
            ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);