java - AES加密抛出 "Illegal Key Size error"

Question

这个问题已经有答案了:

InvalidKeyException Illegal key size (6 个回答)

已关闭 9 年前。

我正在尝试使用 AES 加密。下面是我的代码片段:

private final static String ENCRYPTION_ALGORITHM = "AES";
private final static String CIPHER_TRANSFORMATION = "AES/CBC/PKCS5Padding";
private final static String ENCODING = "UTF-8";
private final static String KEY_STRING = "C0BAE23DF8B51807B3E17D21925FADF273A70181E1D81B8EDE6C76A5C1F1716E";

public static String encryptData(String plainText) {

    String keyString = KEY_STRING;
    String encryptedValue = null;

    byte[] keyValue = DatatypeConverter.parseHexBinary(keyString);
    Key key = new SecretKeySpec(keyValue, ENCRYPTION_ALGORITHM);
    Cipher cipher;
    byte[] encVal;

    try {
        cipher = Cipher.getInstance(CIPHER_TRANSFORMATION);
        cipher.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(new byte[64]));
        encVal = cipher.doFinal(plainText.getBytes());
        encryptedValue = (new BASE64Encoder()).encode(encVal);
    } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | IllegalBlockSizeException | BadPaddingException | InvalidAlgorithmParameterException e) {
        System.out.println("Error in EncryptData.encryptData(): " + e.getMessage());
        encryptedValue = null;
    }


    return encryptedValue;
}

下面是我在 eclipse 中运行时遇到的错误:

Error in EncryptData.encryptData(): Illegal key size

有什么建议或者我做错了什么吗？

Answer 1

您是否已更新策略以允许 256 位加密？检查来自 http://www.oracle.com/technetwork/java/javase/downloads/index.html 的“Java 加密扩展 (JCE) 无限强度管辖权策略文件 6” .