| /* |
| * 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.harmony.xnet.provider.jsse; |
| |
| import java.util.Hashtable; |
| |
| /** |
| * |
| * Represents Protocol Version |
| */ |
| public class ProtocolVersion { |
| /** |
| * Protocols supported by this provider implementation |
| */ |
| public static final String[] supportedProtocols = new String[] { "TLSv1", |
| "SSLv3" }; |
| |
| private static Hashtable<String, ProtocolVersion> protocolsByName = new Hashtable<String, ProtocolVersion>(4); |
| |
| /** |
| * |
| * Returns true if protocol version is supported |
| * |
| * @param version |
| */ |
| public static boolean isSupported(byte[] version) { |
| if (version[0] != 3 || (version[1] != 0 && version[1] != 1)) { |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * Returns ProtocolVersion |
| * |
| * @param version |
| * @return |
| */ |
| public static ProtocolVersion getByVersion(byte[] version) { |
| if (version[0] == 3) { |
| if (version[1] == 1) { |
| return TLSv1; |
| } |
| if (version[1] == 0) { |
| return SSLv3; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Returns true if provider supports protocol version |
| * |
| * @param name |
| * @return |
| */ |
| public static boolean isSupported(String name) { |
| return protocolsByName.containsKey(name); |
| } |
| |
| /** |
| * Returns ProtocolVersion |
| * |
| * @param name |
| * @return |
| */ |
| public static ProtocolVersion getByName(String name) { |
| return protocolsByName.get(name); |
| } |
| |
| /** |
| * Highest protocol version supported by provider implementation |
| * |
| * @param protocols |
| * @return |
| */ |
| public static ProtocolVersion getLatestVersion(String[] protocols) { |
| if (protocols == null || protocols.length == 0) { |
| return null; |
| } |
| ProtocolVersion latest = getByName(protocols[0]); |
| ProtocolVersion current; |
| for (int i = 1; i < protocols.length; i++) { |
| current = getByName(protocols[i]); |
| if (current == null) { |
| continue; |
| } |
| if ((latest == null) |
| || (latest.version[0] < current.version[0]) |
| || (latest.version[0] == current.version[0] && latest.version[1] < current.version[1])) { |
| latest = current; |
| } |
| } |
| return latest; |
| |
| } |
| |
| /** |
| * SSL 3.0 protocol version |
| */ |
| public static final ProtocolVersion SSLv3 = new ProtocolVersion("SSLv3", |
| new byte[] { 3, 0 }); |
| |
| /** |
| * TLS 1.0 protocol version |
| */ |
| public static final ProtocolVersion TLSv1 = new ProtocolVersion("TLSv1", |
| new byte[] { 3, 1 }); |
| |
| static { |
| protocolsByName.put(SSLv3.name, SSLv3); |
| protocolsByName.put(TLSv1.name, TLSv1); |
| protocolsByName.put("SSL", SSLv3); |
| protocolsByName.put("TLS", TLSv1); |
| } |
| |
| /** |
| * Protocol name |
| */ |
| public final String name; |
| |
| /** |
| * Protocol version as byte array |
| */ |
| public final byte[] version; |
| |
| private ProtocolVersion(String name, byte[] version) { |
| this.name = name; |
| this.version = version; |
| } |
| } |