| /* |
| * Copyright 2014 The Android Open Source Project |
| * |
| * Licensed 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.conscrypt; |
| |
| import java.util.regex.Pattern; |
| |
| /** |
| * Utilities to check whether IP addresses meet some criteria. |
| */ |
| final class AddressUtils { |
| /* |
| * Regex that matches valid IPv4 and IPv6 addresses. |
| */ |
| private static final String IP_PATTERN = "^(?:(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9])\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9]))|" |
| + "(?i:(?:(?:[0-9a-f]{1,4}:){7}(?:[0-9a-f]{1,4}|:))|(?:(?:[0-9a-f]{1,4}:){6}(?::[0-9a-f]{1,4}|(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(?:\\.(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3})|:))|(?:(?:[0-9a-f]{1,4}:){5}(?:(?:(?::[0-9a-f]{1,4}){1,2})|:(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(?:\\.(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3})|:))|(?:(?:[0-9a-f]{1,4}:){4}(?:(?:(?::[0-9a-f]{1,4}){1,3})|(?:(?::[0-9a-f]{1,4})?:(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(?:\\.(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(?:(?:[0-9a-f]{1,4}:){3}(?:(?:(?::[0-9a-f]{1,4}){1,4})|(?:(?::[0-9a-f]{1,4}){0,2}:(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(?:\\.(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(?:(?:[0-9a-f]{1,4}:){2}(?:(?:(?::[0-9a-f]{1,4}){1,5})|(?:(?::[0-9a-f]{1,4}){0,3}:(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(?:\\.(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(?:(?:[0-9a-f]{1,4}:){1}(?:(?:(?::[0-9a-f]{1,4}){1,6})|(?:(?::[0-9a-f]{1,4}){0,4}:(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(?:\\.(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(?::(?:(?:(?::[0-9a-f]{1,4}){1,7})|(?:(?::[0-9a-f]{1,4}){0,5}:(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(?:\\.(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:)))(?:%.+)?$"; |
| |
| private static Pattern ipPattern; |
| |
| private AddressUtils() {} |
| |
| /** |
| * Returns true when the supplied hostname is valid for SNI purposes. |
| */ |
| static boolean isValidSniHostname(String sniHostname) { |
| if (sniHostname == null) { |
| return false; |
| } |
| |
| // Must be a FQDN that does not have a trailing dot. |
| return (sniHostname.equalsIgnoreCase("localhost") |
| || sniHostname.indexOf('.') != -1) |
| && !isLiteralIpAddress(sniHostname) |
| && !sniHostname.endsWith(".") |
| && sniHostname.indexOf('\0') == -1; |
| } |
| |
| /** |
| * Returns true if the supplied hostname is an literal IP address. |
| */ |
| static boolean isLiteralIpAddress(String hostname) { |
| /* This is here for backwards compatibility for pre-Honeycomb devices. */ |
| Pattern ipPattern = AddressUtils.ipPattern; |
| if (ipPattern == null) { |
| AddressUtils.ipPattern = ipPattern = Pattern.compile(IP_PATTERN); |
| } |
| return ipPattern.matcher(hostname).matches(); |
| } |
| } |