com.bugvm.conscrypt.ProtocolVersion Maven / Gradle / Ivy
/*
* 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 com.bugvm.conscrypt;
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 protocolsByName = new Hashtable(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;
}
}