code: public static boolean verify(String content, String base64Cipher, String pubKey) {
          return RSA.verify(content.getBytes(), Base64Util.decode(base64Cipher), decryptPublicKey(pubKey));
      }
docs: 对源内容及base64密文进行验签处理
  
  @param content
  @param base64Cipher
  @param pubKey
  @return