java - 无效 key 异常 :Ilegal key size

Question

这个问题已经有答案了:

Java Security: Illegal key size or default parameters? (19 个回答)

InvalidKeyException Illegal key size (6 个回答)

已关闭 3 年前。

我正在尝试加密一个字符串，但出现错误无效 key 异常:非法 key 大小，我试图在一个月内制定解决方案，我需要帮助:(。“对不起，我的英语不好”

    private static String secretKey = "PSKDF2";
    private static String salt = "ssshhhhhhhhhhh!!!!";

    public static String encrypt(String strToEncrypt, String secret) {
        try {
            byte[] iv = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
            IvParameterSpec ivspec = new IvParameterSpec(iv);

            SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
            KeySpec spec = new PBEKeySpec(secretKey.toCharArray(), salt.getBytes(), 65536, 256);
            SecretKey tmp = factory.generateSecret(spec);
            SecretKeySpec secretKey = new SecretKeySpec(tmp.getEncoded(), "AES");

            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivspec);
            return Base64.getEncoder().encodeToString(cipher.doFinal(strToEncrypt.getBytes("UTF-8")));
        } catch (Exception e) {
            System.out.println("Error while encrypting: " + e.toString());
        }
        return null;
    }

    public static String decrypt(String strToDecrypt, String secret) {
        try {
            byte[] iv = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
            IvParameterSpec ivspec = new IvParameterSpec(iv);

            SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
            KeySpec spec = new PBEKeySpec(secretKey.toCharArray(), salt.getBytes(), 65536, 256);
            SecretKey tmp = factory.generateSecret(spec);
            SecretKeySpec secretKey = new SecretKeySpec(tmp.getEncoded(), "AES");

            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
            cipher.init(Cipher.DECRYPT_MODE, secretKey, ivspec);
            return new String(cipher.doFinal(Base64.getDecoder().decode(strToDecrypt)));
        } catch (Exception e) {
            System.out.println("Error while decrypting: " + e.toString());
        }
        return null;
    }

我认为错误就在这里。

Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

错误是这样的

Error while encrypting: java.security.InvalidKeyException: Illegal key size

请帮忙:(

Answer 1

您可以尝试以下ways来解决这个问题。好像有些软件包还没有安装。