现有数据加解密如下：HarmonyOS中如何实现？

public static String encryptPwdAA(String publicKey, String pwd) throws Exception{ 
  Security.addProvider(new BouncyCastleProvider()); 
  PemReader pemReader = new PemReader(new StringReader(publicKey)); 
  PemObject pemObject = pemReader.readPemObject(); 
  if (pemObject == null) { 
    throw new IOException("expected pem"); 
  } 
  X509EncodedKeySpec keySpec = new X509EncodedKeySpec(pemObject.getContent()); 
  KeyFactory keyFactory = KeyFactory.getInstance("RSA"); 
  RSAPublicKey rsaPublicKey = (RSAPublicKey) keyFactory.generatePublic(keySpec); 
  Cipher cipher; 
  cipher = Cipher.getInstance("RSA/NONE/OAEPWithSHA1AndMGF1Padding", BouncyCastleProvider.PROVIDER_NAME); 
  cipher.init(Cipher.ENCRYPT_MODE, rsaPublicKey); 
  byte[] output = cipher.doFinal(pwd.getBytes()); 
  String encryptPwd = Base64.encodeToString(output,Base64.DEFAULT).replaceAll("\n", ""); 
  System.out.println("encrypt pwd : " + encryptPwd); 
  return encryptPwd; 
}