HarmonyOS 关于base64和aes加密相关问题

代码翻译成ArkTS

核心知识: Base64、AES、加密

尝试Base64Helper， 不太行

public class AESUtil {

  public static final String KEYT = "aaaaaaaaaaaa";

  private static final String MODEL = "AES/ECB/PKCS7Padding";

  public static String encode(String key, String content) {

  try {
  SecretKeySpec skeySpec = getKey(key);
  byte[] clearText = content.getBytes("UTF8");
  Cipher cipher = Cipher.getInstance(MODEL);
  cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
  byte[] result = cipher.doFinal(clearText);
  String encrypedValue = Base64.encodeToString(result, Base64.DEFAULT);
  return encrypedValue;
  } catch (Exception e) {
    e.printStackTrace();
  }
    return "";
  }

  public static String decode(String key, String content) {
    try {
      SecretKeySpec skeySpec = getKey(key);
      byte[] contentBytes = Base64.decode(content, Base64.DEFAULT);
      Cipher cipher = Cipher.getInstance(MODEL);
      cipher.init(Cipher.DECRYPT_MODE, skeySpec);
      byte[] result = cipher.doFinal(contentBytes);
      return new String(result);
    } catch (Exception e) {
      e.printStackTrace();
    }
    return "";
  }

  private static SecretKeySpec getKey(String password) throws UnsupportedEncodingException {
    // 128位加密
    int keyLength = 128;
    byte[] keyBytes = new byte[keyLength / 8];
    Arrays.fill(keyBytes, (byte) 0x0);
    byte[] passwordBytes = password.getBytes("UTF-8");
    int length = passwordBytes.length < keyBytes.length ? passwordBytes.length : keyBytes.length;
    System.arraycopy(passwordBytes, 0, keyBytes, 0, length);
    SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
    return key;
  }
}