我编写了以下简单程序来生成RSA密钥对，并在APDU响应中将公钥传输到卡外：
AttributeError: 'AppenderBaseQuery' object has no attribute 'id'但是当我向卡片发送相关的APDU命令时，我会收到public class CryptoRSA extends Applet {
//Abbreviations
private static final boolean NO_EXTERNAL_ACCESS = false;
//Switch case parameters for selecting instruction = INS in apdu command
private static final byte GENERATE_KEY_PAIR = (byte) 0xC0;
//Create object of keys
RSAPrivateKey thePrivateKey = (RSAPrivateKey) KeyBuilder.buildKey(KeyBuilder.TYPE_RSA_PRIVATE, KeyBuilder.LENGTH_RSA_512, NO_EXTERNAL_ACCESS);
RSAPublicKey thePublickKey = (RSAPublicKey) KeyBuilder.buildKey(KeyBuilder.TYPE_RSA_PUBLIC, KeyBuilder.LENGTH_RSA_512, NO_EXTERNAL_ACCESS);
KeyPair theKeyPair = new KeyPair(thePublickKey, thePrivateKey);
public static void install(byte[] bArray, short bOffset, byte bLength) {
new CryptoRSA();
}
protected CryptoRSA() {
register();
}
public void process(APDU apdu) {
if (selectingApplet()) {
return;
}
byte[] buffer = apdu.getBuffer();
short privateKeySize = 0;
short publicKeySize = 0;
byte[] publicArray;
byte[] privateArray;
try {
switch (buffer[ISO7816.OFFSET_INS]) {
case GENERATE_KEY_PAIR:
theKeyPair.genKeyPair();
PrivateKey thePrivateKey = theKeyPair.getPrivate();
PublicKey thePublicKey = theKeyPair.getPublic();
publicKeySize = thePrivateKey.getSize();
privateKeySize = thePrivateKey.getSize();
byte[] publicKey = JCSystem.makeTransientByteArray((short) (publicKeySize), JCSystem.CLEAR_ON_DESELECT);
((RSAPublicKey) thePrivateKey).getExponent(publicKey, (short) publicKeySize);
Util.arrayCopyNonAtomic(publicKey, (short) 0, buffer, (short) 0, (short) (publicKeySize ));
apdu.setOutgoingAndSend((short) 0, (short) (publicKeySize));
break;
default:
ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
}
} catch (Exception e) {
if (e instanceof CryptoException) {
short r = ((CryptoException) e).getReason();
ISOException.throwIt(r);
} else {
ISOException.throwIt((short) 0x8888);
}
}
}
}
，如下所示：
0x8888答案 0 :(得分：3)
getSize()返回密钥的位长，而不是字节长度。你可能已经没用RAM了。 2。((RSAPublicKey) thePrivateKey).getExponent(publicKey, (short) publicKeySize);
这不会奏效！您要求将指数存储在数组publicKeySize中的偏移publicKey处 - 也就是说，在数组的最末端，其中只剩下0个字节来存储它。
顺便说一句，下次遇到这样的问题时，您可以使用ISOException将调试数据发送到外部世界。例如，ISOException.throwIt(privateKeySize)会发现问题1.