我想在我的 Java Card 上签署一些数据(MESSAGE 字节数组),然后在响应 APDU 中返回签名。我的代码在没有apdu.sendBytes(BAS, sSignLen)行的情况下工作正常(或者至少我认为它可以正常工作并且它返回 9000),但是当我取消注释它时,我得到一个未知错误(0xC000002B (Unknown error.))。
当我尝试在响应 APDU 中发送其他数据时,它可以完美运行。
apdu.setIncomingAndReceive();
Util.arrayCopyNonAtomic(MESSAGE, (short) 0, buffer, (short) 0, (short) MESSAGE.length);
apdu.setOutgoingAndSend((short) 0, (short) MESSAGE.length);
这是我的代码。我做错了什么或错过了什么?谢谢!
public class TestApplet extends Applet {
...
private final static byte SIGN = (byte) 0x01;
...
private final static byte[] MESSAGE = new byte[] { 'M', 'e', 's', 's', 'a', 'g', 'e' };
final static short BAS = 0;
public void process(APDU apdu) {
if (this.selectingApplet())
return;
byte buffer[] = apdu.getBuffer();
...
switch (buffer[ISO7816.OFFSET_INS]) {
case SIGN:
try {
ECDSAKeyPair = Secp256k1Domain.getKeyPairParameter();
ECDSAKeyPair.genKeyPair();
ECDSAPublicKey = (ECPublicKey) ECDSAKeyPair.getPublic();
ECDSAPrivateKey = (ECPrivateKey) ECDSAKeyPair.getPrivate();
ECDSASignature = Signature.getInstance(Signature.ALG_ECDSA_SHA, false);
short signLen = 0;
byte[] signatureArray = new byte[70];
ECDSASignature.init(ECDSAPrivateKey, Signature.MODE_SIGN);
signLen = ECDSASignature.sign(MESSAGE, BAS, (short) MESSAGE.length, signatureArray, BAS);
apdu.setIncomingAndReceive();
Util.arrayCopyNonAtomic(signatureArray, (short) 0, buffer, (short) 0, (short) signatureArray.length);
apdu.setOutgoingAndSend((short) 0, (short) signatureArray.length);
} catch (CryptoException c) {
short reason = c.getReason();
ISOException.throwIt((short) ((short) (0x9C00) | reason));
}
break;
...
return;
}
}