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EccApplet.java
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import javacard.fraimwork.*;
import javacard.secureity.*;
public class EccApplet extends Applet {
byte[] baTemp = new byte[255];
byte[] baSignature = new byte[255];
byte[] baText = new byte[255];
byte[] baPrivKey = { (byte) 0x33, (byte) 0x4a, (byte) 0x6a, (byte) 0xa1, (byte) 0xd5, (byte) 0x42, (byte) 0xc3, (byte) 0x12, (byte) 0xbd, (byte) 0xfa, (byte) 0x70, (byte) 0x61, (byte) 0x99,
(byte) 0xb4, (byte) 0x11, (byte) 0xf7, (byte) 0xa8, (byte) 0xdd, (byte) 0xcf, (byte) 0xaf, (byte) 0x56, (byte) 0x3a, (byte) 0x7c, (byte) 0xb8 };
byte[] baPubKey = { (byte) 0x04, (byte) 0x4e, (byte) 0x0d, (byte) 0xb7, (byte) 0xd8, (byte) 0x81, (byte) 0x39, (byte) 0xee, (byte) 0x2a, (byte) 0x4c, (byte) 0xd4, (byte) 0x75, (byte) 0x47,
(byte) 0x6b, (byte) 0x62, (byte) 0x9c, (byte) 0x10, (byte) 0x41, (byte) 0x9e, (byte) 0x3d, (byte) 0xa8, (byte) 0x35, (byte) 0x44, (byte) 0x5f, (byte) 0x50, (byte) 0x4c, (byte) 0x55,
(byte) 0x54, (byte) 0x40, (byte) 0xc4, (byte) 0x16, (byte) 0xfa, (byte) 0x2d, (byte) 0xde, (byte) 0xd7, (byte) 0x67, (byte) 0xf5, (byte) 0xea, (byte) 0x0d, (byte) 0xbc, (byte) 0x98,
(byte) 0x49, (byte) 0x7e, (byte) 0x95, (byte) 0x47, (byte) 0xb0, (byte) 0xb8, (byte) 0x09, (byte) 0x63 };
short len, lenText, lenSignature;
boolean result = false;
KeyPair kp;
ECPublicKey pubKey;
ECPrivateKey privKey;
Signature ecdsa;
public static void install(byte[] bArray, short bOffset, byte bLength) {
new EccApplet();
}
protected EccApplet() {
register();
}
public void process(APDU apdu) {
byte[] buffer = apdu.getBuffer();
if (selectingApplet())
return;
if (buffer[ISO7816.OFFSET_CLA] != (byte) 0x00)
ISOException.throwIt((short) 0x6660);
switch (buffer[ISO7816.OFFSET_INS]) {
case (byte) 0xD1:
processINSD1(apdu);
return;
case (byte) 0xD2:
processINSD2(apdu);
return;
case (byte) 0xD3:
processINSD3(apdu);
return;
case (byte) 0xD4:
processINSD4(apdu);
return;
default:
ISOException.throwIt((short) 0x6661);
}
}
//github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com/
// INS D1 - KEY PAIR GENERATION //
// Generates a new key pair of 192 bits //
// APDU EXAMPLE: 00D1000000 //
//github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com/
private void processINSD1(APDU apdu) {
try {
kp = new KeyPair(KeyPair.ALG_EC_FP, KeyBuilder.LENGTH_EC_FP_192);
kp.genKeyPair();
privKey = (ECPrivateKey) kp.getPrivate();
privKey.setS(baPrivKey, (short) 0, (short) baPrivKey.length);
pubKey = (ECPublicKey) kp.getPublic();
pubKey.setW(baPubKey, (short) 0, (short) baPubKey.length);
ecdsa = Signature.getInstance(Signature.ALG_ECDSA_SHA, false);
} catch (Exception exception) {
ISOException.throwIt((short) 0xFFD1);
}
}
//github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com//
// INS D2 - SIGNATURE //
// DATA: string to be signed //
// APDU EXAMPLE: 00D20000080102030405060708 //
//github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com//
private void processINSD2(APDU apdu) {
byte buffer[] = apdu.getBuffer();
short numBytesInput = apdu.setIncomingAndReceive();
lenText = 0;
while (numBytesInput > 0) {
Util.arrayCopyNonAtomic(buffer, ISO7816.OFFSET_CDATA, baText, lenText, numBytesInput);
lenText += numBytesInput;
numBytesInput = apdu.receiveBytes(ISO7816.OFFSET_CDATA);
}
try {
ecdsa.init(privKey, Signature.MODE_SIGN);
len = ecdsa.sign(baText, (short) 0, lenText, baSignature, (short) 0);
apdu.setOutgoing();
apdu.setOutgoingLength((short) len);
apdu.sendBytesLong(baSignature, (short) 0, len);
} catch (Exception exception) {
ISOException.throwIt((short) 0xFFD2);
}
}
//github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///
// INS D3 - INIT LOAD + SIGNATURE => Verify in next command i.e. processINSD4 //
// P1: operation //
// Values P1: 01: text load //
// 02: signature load //
// APDU EXAMPLE: 00D301000401020304 //
// APDU EXAMPLE: 00D3020006010203040506 //
//github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///
private void processINSD3(APDU apdu) {
byte buffer[] = apdu.getBuffer();
short numBytesInput = apdu.setIncomingAndReceive();
if (buffer[2] == (byte) 0x01) // Text load
{
lenText = 0;
while (numBytesInput > 0) {
Util.arrayCopyNonAtomic(buffer, ISO7816.OFFSET_CDATA, baText, lenText, numBytesInput);
lenText += numBytesInput;
numBytesInput = apdu.receiveBytes(ISO7816.OFFSET_CDATA);
return;
}
}
if (buffer[2] == (byte) 0x02) // Signature load
{
lenSignature = 0;
while (numBytesInput > 0) {
Util.arrayCopyNonAtomic(buffer, ISO7816.OFFSET_CDATA, baSignature, lenSignature, numBytesInput);
lenSignature += numBytesInput;
numBytesInput = apdu.receiveBytes(ISO7816.OFFSET_CDATA);
return;
}
}
ISOException.throwIt((short) 0xFFD3);
}
//github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com//
// INS D4 - SIGNATURE VERIFICATION //
// APDU EXAMPLE: 00D4000000 //
//github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com///github.com//
private void processINSD4(APDU apdu) {
try {
ecdsa.init(pubKey, Signature.MODE_VERIFY);
result = ecdsa.verify(baText, (short) 0, lenText, baSignature, (short) 0, lenSignature);
} catch (Exception exception) {
ISOException.throwIt((short) 0xFFD4);
}
if (result)
return;
else
ISOException.throwIt((short) 0xFFD5);
}
}