| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.knox.gateway.util; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| |
| /** |
| * Validate a given IP Address against a list of comma separated list of addresses. |
| */ |
| public class IpAddressValidator { |
| |
| /** |
| * The parsed list of ip addresses |
| */ |
| private ArrayList<String> ipaddr = new ArrayList<>(); |
| |
| /** |
| * IP addresses from the ipaddr list that contain a wildcard character '*' |
| */ |
| private ArrayList<String> wildCardIPs = new ArrayList<>(); |
| |
| /** |
| * Optimization based on empty IP address list or an explicit '*' wildcard |
| */ |
| private boolean anyIP = true; |
| |
| /** |
| * ctor - initialize an instance with the given ip address list |
| * @param commaSeparatedIpAddresses - comma separated list of ip addresses |
| */ |
| public IpAddressValidator(String commaSeparatedIpAddresses) { |
| if (commaSeparatedIpAddresses == null) { |
| anyIP = true; |
| return; |
| } |
| |
| parseIpAddesses(commaSeparatedIpAddresses); |
| } |
| |
| private void parseIpAddesses(String commaSeparatedIpAddresses) { |
| String[] ips = commaSeparatedIpAddresses.split(","); |
| ipaddr = new ArrayList<>(); |
| wildCardIPs = new ArrayList<>(); |
| Collections.addAll(ipaddr, ips); |
| if (!ipaddr.contains("*")) { |
| anyIP = false; |
| // check whether there are any wildcarded ip's - example: 192.* or 192.168.* or 192.168.1.* |
| for (String addr : ipaddr) { |
| if (addr.contains("*")) { |
| wildCardIPs.add(addr.substring(0, addr.lastIndexOf('*'))); |
| } |
| } |
| } |
| } |
| |
| public boolean validateIpAddress(String addr) { |
| boolean valid = false; |
| if (addr == null) { |
| // LJM TODO: log as possible programming error |
| return false; |
| } |
| |
| if (anyIP) { |
| valid = true; |
| } |
| else { |
| if (ipaddr.contains(addr)) { |
| valid = true; |
| } |
| else { |
| // check for wildcards if there are wildcardIP acls configured |
| if (!wildCardIPs.isEmpty()) { |
| for (String ip : wildCardIPs) { |
| if (addr.startsWith(ip)) { |
| valid = true; |
| break; |
| } |
| } |
| } |
| } |
| } |
| return valid; |
| } |
| |
| public boolean allowsAnyIP() { |
| return anyIP; |
| } |
| |
| public ArrayList<String> getIPAddresses() { |
| return ipaddr; |
| } |
| } |