XCyMzaix

1public byte[] privDecript(byte[] msg) throws FileNotFoundException, IOException, NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
2        FileInputStream privt = new FileInputStream("svKey\\private_key");
3        byte[] priv = new byte[privt.available()];
4        privt.read(priv);
5
6        PKCS8EncodedKeySpec keyPv = new PKCS8EncodedKeySpec(priv);
7        KeyFactory kf = KeyFactory.getInstance("RSA");
8        PrivateKey privKey = kf.generatePrivate(keyPv);
9
10        Cipher cp = Cipher.getInstance("RSA");
11        cp.init(Cipher.DECRYPT_MODE, privKey);
12        return cp.doFinal(msg);
13
14        /*cp.init(Cipher.UNWRAP_MODE, privKey);
15        return (SecretKey) cp.unwrap(msg, "HmacMD5", Cipher.SECRET_KEY);*/
16    }