Java卡加密异常RSA密钥加密

Question

我试图在Java卡上重新创建一个公钥，并用它来加密一些数据

下面是构建我正在使用的公钥的代码：

rsaPublicId = (RSAPublicKey) KeyBuilder.buildKey(KeyBuilder.TYPE_RSA_PUBLIC, KeyBuilder.LENGTH_RSA_2048, false);
rsaPublicId.setExponent(rsaExponent, (short) 0, (short) rsaExponent.length);
rsaPublicId.setModulus(rsaPublicModulus, (short) 12, (short) ((short) rsaPublicModulus.length - (short) 12));

cipherId.init(rsaPublicId, Cipher.MODE_ENCRYPT);

当我尝试加密数据时，我使用以下代码：

cipherId.doFinal(serviceBytes, (short) 0, (short) 16, buffer, (short) 0);

但它发生在一张javacard上。安全cryptoException，详细信息为“null”

cipherId = Cipher.getInstance(Cipher.ALG_RSA_PKCS1, false);

模数设置为308，用Java创建并发送到卡

Answer 1

你的算法错了

cipherId = Cipher.getInstance(Cipher.ALG_RSA_PKCS1, false);

请试一试

cipherId = Cipher.getInstance(Cipher.ALG_RSA_NOPAD, false);

Answer 2

可能模数长度不等于2048位，可能会抛出非法使用