Java APDU.getBuffer方法代码示例

import javacard.framework.APDU; //导入方法依赖的package包/类
/**
 * Upon the generation of the triplet, the members perform a pairwise
 * exchange of their commitments by the end of which, they all hold a
 * set H = {h1,h2, ..,ht }. The commitment exchange terminates when |Hq | =
 * t ∀q ∈ Q
 * @param apdu 
 */
void KeyGen_StoreCommitment(APDU apdu) {
    byte[] apdubuf = apdu.getBuffer();
    short len = apdu.getIncomingLength();
    
    short paramsOffset = GetOperationParamsOffset(Consts.INS_KEYGEN_STORE_COMMITMENT, apdu);
    // Parse incoming apdu to obtain target quorum context
    QuorumContext quorumCtx = GetTargetQuorumContext(apdubuf, paramsOffset);
    // Verify authorization
    quorumCtx.VerifyCallerAuthorization(apdu, StateModel.FNC_QuorumContext_StoreCommitment);
    
    // Store provided commitment
    short playerId = Util.getShort(apdubuf, (short) (paramsOffset + Consts.PACKET_PARAMS_KEYGENSTORECOMMITMENT_PLAYERID_OFFSET));
    short commitmentLen = Util.getShort(apdubuf, (short) (paramsOffset + Consts.PACKET_PARAMS_KEYGENSTORECOMMITMENT_COMMITMENTLENGTH_OFFSET));
    quorumCtx.StoreCommitment(playerId, apdubuf, (short) (paramsOffset + Consts.PACKET_PARAMS_KEYGENSTORECOMMITMENT_COMMITMENT_OFFSET), commitmentLen);
}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
void test_EC_MUL(APDU apdu) {
    byte[] apdubuf = apdu.getBuffer();
    short p1_len = (short) (apdubuf[ISO7816.OFFSET_P1] & 0x00FF);

    PM.check(PM.TRAP_EC_MUL_1);
    Bignat scalar = m_testBN1;
    scalar.set_size(p1_len);
    scalar.from_byte_array(p1_len, (short) 0, apdubuf, ISO7816.OFFSET_CDATA);
    PM.check(PM.TRAP_EC_MUL_2);
    m_testPoint1.setW(apdubuf, (short) (ISO7816.OFFSET_CDATA + p1_len), m_testCurve.POINT_SIZE);
    PM.check(PM.TRAP_EC_MUL_3);
    m_testPoint1.multiplication(scalar);
    PM.check(PM.TRAP_EC_MUL_4);

    short len = m_testPoint1.getW(apdubuf, (short) 0);
    PM.check(PM.TRAP_EC_MUL_5);
    apdu.setOutgoingAndSend((short) 0, len);
}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
public void process(APDU apdu) {
	// Good practice: Return 9000 on SELECT
	if (selectingApplet()) {
		return;
	}

	byte[] buf = apdu.getBuffer();
	switch (buf[ISO7816.OFFSET_INS]) {
	case (byte) 0x00:
		handleGetPRand(apdu);
		break;
	case (byte) 0x01:
		handleGetCmac(apdu);
		break;
	default:
		// good practice: If you don't know the INStruction, say so:
		ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
	}
}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
void test_BN_EXP(APDU apdu, short dataLen) {
    byte[] apdubuf = apdu.getBuffer();
    short p1 = (short) (apdubuf[ISO7816.OFFSET_P1] & 0x00FF);
    short p2 = (short) (apdubuf[ISO7816.OFFSET_P2] & 0x00FF);

    PM.check(PM.TRAP_BN_EXP_1);    
    Bignat base = m_testBN1;
    base.set_size(p1);
    PM.check(PM.TRAP_BN_EXP_2);
    Bignat exp = m_testBN2;
    exp.set_size((short) (dataLen - p1));
    PM.check(PM.TRAP_BN_EXP_3);
    Bignat res = m_testBN3;
    res.set_size((short) (m_ecc.MAX_BIGNAT_SIZE / 2));
    PM.check(PM.TRAP_BN_EXP_4);
    base.from_byte_array(p1, (short) 0, apdubuf, ISO7816.OFFSET_CDATA);
    exp.from_byte_array((short) (dataLen - p1), (short) 0, apdubuf, (short)(ISO7816.OFFSET_CDATA+p1));
    PM.check(PM.TRAP_BN_EXP_5);
    res.exponentiation(base, exp);
    PM.check(PM.TRAP_BN_EXP_6);
    short len = res.copy_to_buffer(apdubuf, (short) 0);
    apdu.setOutgoingAndSend((short) 0, len);
}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
void test_INT_ADD(APDU apdu, short dataLen) {
    byte[] apdubuf = apdu.getBuffer();
    short p1 = (short) (apdubuf[ISO7816.OFFSET_P1] & 0x00FF);

    PM.check(PM.TRAP_INT_ADD_1);    
    //Integer num_add_1 = new Integer(dataLen, (short) 0, apdubuf, ISO7816.OFFSET_CDATA);
    Integer num_add_1 = m_testINT1;
    num_add_1.fromByteArray(apdubuf, ISO7816.OFFSET_CDATA, p1);
    PM.check(PM.TRAP_INT_ADD_2);
    //Integer num_add_2 = new Integer((short) (dataLen - p1), (short) 0, apdubuf, (short) (ISO7816.OFFSET_CDATA + p1));
    Integer num_add_2 = m_testINT2;
    num_add_2.fromByteArray(apdubuf, (short) (ISO7816.OFFSET_CDATA + p1), p1);
    PM.check(PM.TRAP_INT_ADD_3);
    num_add_1.add(num_add_2);
    PM.check(PM.TRAP_INT_ADD_4);
    short len = num_add_1.toByteArray(apdubuf, (short) 0);
    apdu.setOutgoingAndSend((short) 0, len);
}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
void test_EC_SETCURVE_G(APDU apdu, short dataLen) {
     byte[] apdubuf = apdu.getBuffer();
     
     Util.arrayCopyNonAtomic(apdubuf, ISO7816.OFFSET_CDATA, m_customG, (short) 0, dataLen);
     PM.check(PM.TRAP_EC_SETCURVE_1);

     if (apdubuf[ISO7816.OFFSET_P2] == 1) { // If required, complete new custom curve and point is allocated
         m_testCurveCustom = new ECCurve(false, SecP256r1.p, SecP256r1.a, SecP256r1.b, m_customG, SecP256r1.r, m_ecc);
         m_testPointCustom = new ECPoint(m_testCurveCustom, m_ecc);
         PM.check(PM.TRAP_EC_SETCURVE_2);
         // Release unused previous objects
         if (!bIsSimulator) {
             JCSystem.requestObjectDeletion();
         }
     }
     else {
         // Otherwise, only G is set and relevant objects are updated
         m_testCurveCustom.setG(apdubuf, (short) ISO7816.OFFSET_CDATA, m_testCurveCustom.POINT_SIZE);
         m_testPointCustom.updatePointObjects(); // After changing curve parameters, internal objects needs to be actualized
     }
}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
void test_INT_MUL(APDU apdu, short dataLen) {
    byte[] apdubuf = apdu.getBuffer();
    short p1 = (short) (apdubuf[ISO7816.OFFSET_P1] & 0x00FF);

    PM.check(PM.TRAP_INT_MUL_1);    
    Integer num_mul_1 = m_testINT1;
    num_mul_1.fromByteArray(apdubuf, ISO7816.OFFSET_CDATA, p1);
    Integer num_mul_2 = m_testINT2;
    num_mul_2.fromByteArray(apdubuf, (short) (ISO7816.OFFSET_CDATA + p1), p1);
    PM.check(PM.TRAP_INT_MUL_2);

    num_mul_1.multiply(num_mul_2);
    PM.check(PM.TRAP_INT_MUL_3);
    short len = num_mul_1.toByteArray(apdubuf, (short) 0);
    apdu.setOutgoingAndSend((short) 0, len);
}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
void test_BN_SUB(APDU apdu, short dataLen) {
    byte[] apdubuf = apdu.getBuffer();
    short p1 = (short) (apdubuf[ISO7816.OFFSET_P1] & 0x00FF);

    PM.check(PM.TRAP_BN_SUB_1);
    Bignat sub1 = m_testBN1;
    sub1.set_size(p1);
    PM.check(PM.TRAP_BN_SUB_2);
    Bignat sub2 = m_testBN2;
    sub2.set_size((short) (dataLen - p1));
    PM.check(PM.TRAP_BN_SUB_3);
    Bignat result = m_testBN3;
    result.set_size((short) (p1 + 1));
    PM.check(PM.TRAP_BN_SUB_4);
    sub1.from_byte_array(dataLen, (short)0, apdubuf, ISO7816.OFFSET_CDATA);
    sub2.from_byte_array(dataLen, (short)0, apdubuf, (short)(ISO7816.OFFSET_CDATA+p1));
    PM.check(PM.TRAP_BN_SUB_5);
    result.copy(sub1);
    PM.check(PM.TRAP_BN_SUB_6);
    result.subtract(sub2);
    PM.check(PM.TRAP_BN_SUB_7);
    short len = result.copy_to_buffer(apdubuf, (short) 0);
    apdu.setOutgoingAndSend((short) 0, len);
}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
void test_BN_INV_MOD(APDU apdu, short dataLen) {
    byte[] apdubuf = apdu.getBuffer();
    short p1 = (short) (apdubuf[ISO7816.OFFSET_P1] & 0x00FF);

    PM.check(PM.TRAP_BN_INV_MOD_1);
    Bignat num1 = m_testBN1;
    num1.set_size(p1);
    PM.check(PM.TRAP_BN_INV_MOD_2);
    Bignat mod = m_testBN2;
    mod.set_size((short) (dataLen - p1));
    PM.check(PM.TRAP_BN_INV_MOD_3);
    num1.from_byte_array(p1, (short)0, apdubuf, ISO7816.OFFSET_CDATA);
    mod.from_byte_array((short)(dataLen-p1), (short)0, apdubuf, (short)(ISO7816.OFFSET_CDATA+p1));
    PM.check(PM.TRAP_BN_INV_MOD_4);
    num1.mod_inv(mod);
    PM.check(PM.TRAP_BN_INV_MOD_5);
    short len = num1.copy_to_buffer(apdubuf, (short) 0);
    apdu.setOutgoingAndSend((short) 0, len);
}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
public static short readAPDU(APDU apdu, byte[] buffer, short length) {
    short read = apdu.setIncomingAndReceive();
    read += apdu.getOffsetCdata();
    short total = apdu.getIncomingLength();
    if (total > length) {
        return 0;
    }
    byte[] apduBuffer = apdu.getBuffer();

    short sum = 0;

    do {
        Util.arrayCopyNonAtomic(apduBuffer, (short) 0, buffer, sum, read);
        sum += read;
        read = apdu.receiveBytes((short) 0);
    } while (sum < total);
    return 0;
}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
public void process(APDU apdu) {
	// Good practice: Return 9000 on SELECT
	if (selectingApplet()) { 	
		return;
	}
	byte[] incomingBuf = apdu.getBuffer(); 
	short length = apdu.setIncomingAndReceive();
	if(!usChannel.isSessionSecure()){
		usChannel.establishSecureSession(apdu, incomingBuf);
	}else{
		if(incomingBuf[ISO7816.OFFSET_INS] == 0x20){
			usChannel.resetSessionState();
		}else{
			short decodedLC = usChannel.decodeIncoming(apdu, incomingBuf, length);
			if(decodedLC >   0){ 		
		 		usChannel.encodeAndSend(apdu, incomingBuf, ISO7816.OFFSET_CDATA, (short)(incomingBuf[ISO7816.OFFSET_LC] & 0x00FF));
			}
		}
	}
}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
public void process(APDU apdu) throws ISOException {
	if (selectingApplet())
		return;

	byte[] buffer = apdu.getBuffer();

	switch (buffer[ISO7816.OFFSET_CLA]) {
	case (byte) 0x00: // ISO as described in specs
	case (byte) 0x10: // Chaining
		process_real_commands(apdu, buffer);
	break;
	case (byte) 0x80: // Proprietary: setting/getting values
		process_mock_commands(apdu, buffer);
	break;
	default:
		ISOException.throwIt(ISO7816.SW_CLA_NOT_SUPPORTED);
		break;
	}

}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
/**
 * Store the incoming APDU data in a fixed buffer, the first byte will contain the data length.
 *
 * @param pin_type indicates which PIN should be checked.
 */
void storeVariableLength(APDU apdu, byte[] destination, short pin_type) {
  byte[] buffer = apdu.getBuffer();
  // When writing DOs, PW1 really means PW1 submitted as PW2.
  if (!pins[pin_type].isValidated() ||
      ((pin_type == PIN_INDEX_PW1) && !pinSubmitted[1])) {
    ISOException.throwIt(ISO7816.SW_SECURITY_STATUS_NOT_SATISFIED);
  }
  short length = (short) (buffer[ISO7816.OFFSET_LC] & 0x00FF);
  if ((short) (length + 1) > destination.length || length > (short) 255 ||
      apdu.setIncomingAndReceive() != length) {
    ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
  }
  JCSystem.beginTransaction();
  destination[0] = (byte) length;
  Util.arrayCopy(buffer, ISO7816.OFFSET_CDATA, destination, (short) 1, length);
  JCSystem.commitTransaction();
}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
/**
 * Store the fixed length incoming APDU data in a buffer. If the APDU data length is less than the
 * maximum length, the data will be padded with zeroes.
 */
void storeFixedLength(APDU apdu, byte[] destination, short offset, short maximum_length) {
  byte[] buffer = apdu.getBuffer();
  // When writing DOs, PW1 really means PW1 submitted as PW2.
  if (!pins[PIN_INDEX_PW3].isValidated()) {
    ISOException.throwIt(ISO7816.SW_SECURITY_STATUS_NOT_SATISFIED);
  }
  short length = (short) (buffer[ISO7816.OFFSET_LC] & 0x00FF);
  if (length > maximum_length || apdu.setIncomingAndReceive() != length) {
    ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
  }
  Util.arrayCopy(buffer, ISO7816.OFFSET_CDATA, destination, offset, length);
  if (maximum_length > length) {
    Util.arrayFillNonAtomic(destination, (short) (offset + length),
                            (short) (maximum_length - length), (byte) 0);
  }
}
 

import javacard.framework.APDU; //导入方法依赖的package包/类
private void internalAuthenticate(APDU apdu) {
  byte[] buffer = apdu.getBuffer();
  // PW1 with 0x82
  if (!pins[PIN_INDEX_PW1].isValidated() || !pinSubmitted[1]) {
    ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
  }
  short len = apdu.setIncomingAndReceive();
  if (len > (short) 102 || len != (buffer[ISO7816.OFFSET_LC] & 0xFF)) {
    ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
  }
  if (!authenticationKey.getPrivate().isInitialized()) {
    ISOException.throwIt(ISO7816.SW_FILE_NOT_FOUND);
  }
  cipherRSA.init(authenticationKey.getPrivate(), Cipher.MODE_ENCRYPT);
  cipherRSA.doFinal(buffer, ISO7816.OFFSET_CDATA, len, buffer, (short) 0);
  apdu.setOutgoingAndSend((short) 0, RSA_KEY_LENGTH_BYTES);
}