java - 获取 java.security.InvalidKeyException: Key must be 128, 192, or 256 bit long twofish

Question

以下代码用于加密纯文本，我在下面的示例代码中使用IAIK Twofish加密/解密代码在 java 中使用 128 位密钥可以正常工作，但是当我使用 192 和 156 位密钥尝试它时，它给出了一个例外 java.security.InvalidKeyException: Key must be 128, 192, or 256 bit long!-

private static void doCrypto(int cipherMode, String key, File inputFile, File outputFile) throws CryptoException {
        try {
            SecretKey secretKey = new SecretKeySpec(key.getBytes(), ALGORITHM);
            Cipher cipher = Cipher.getInstance(TRANSFORMATION, "IAIK");
            cipher.init(cipherMode, secretKey); 
            FileInputStream inputStream = new FileInputStream(inputFile);
            byte[] inputBytes = new byte[(int) inputFile.length()];
            inputStream.read(inputBytes);
            byte[] outputBytes = cipher.doFinal(inputBytes);
            FileOutputStream outputStream = new FileOutputStream(outputFile);
            outputStream.write(outputBytes);
            inputStream.close();
            outputStream.close();
        } catch (NoSuchPaddingException | NoSuchAlgorithmException | InvalidKeyException | BadPaddingException
                | IllegalBlockSizeException | IOException ex) {
            throw new CryptoException("Error encrypting/decrypting file", ex);
        } catch (NoSuchProviderException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

对于上述方法，当我提供 128 位密钥时，它可以正常工作，如下所示，

    KeyGenerator keyGen = KeyGenerator.getInstance("Twofish", "IAIK");
    keyGen.init(192);
    txtSecretKey.setText(iaik.utils.Util.toString(key.getEncoded()));
    SekertKey key = key.generateKey();
    encrypt(txtSecretKey.getText(), inputFile, encryptedFile);
Caused by: java.security.InvalidKeyException: Key must be 128, 192, or 256 bit long!
    at iaik.security.cipher.N.a(Unknown Source)
    at iaik.security.cipher.i.a(Unknown Source)
    at iaik.security.cipher.a.engineInit(Unknown Source)
    at javax.crypto.Cipher.init(Cipher.java:1249)
    at javax.crypto.Cipher.init(Cipher.java:1189)
    at com.opensourse.crypto.twofish.CryptoUtils.doCrypto(CryptoUtils.java:38)

标签： javatwofishiaik-jce

Answer 1

确保您从此处获得“java 加密扩展 (jce) 无限强度管辖策略文件 8” 。有关说明，请参阅此。