| /* |
| * Copyright (c) 2002, 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.security.ssl; |
| |
| import java.util.*; |
| |
| /** |
| * A list of ProtocolVersions. Also maintains the list of supported protocols. |
| * Instances of this class are immutable. Some member variables are final |
| * and can be accessed directly without method accessors. |
| * |
| * @author Andreas Sterbenz |
| * @since 1.4.1 |
| */ |
| final class ProtocolList { |
| |
| private static final ProtocolList SUPPORTED; |
| |
| private final Collection<ProtocolVersion> protocols; |
| private String[] protocolNames; |
| |
| // the minimum and maximum ProtocolVersions in this list |
| final ProtocolVersion min, max; |
| |
| // the format for the hello version to use |
| final ProtocolVersion helloVersion; |
| |
| ProtocolList(String[] names) { |
| if (names == null) { |
| throw new IllegalArgumentException("Protocols may not be null"); |
| } |
| protocols = new ArrayList<ProtocolVersion>(3); |
| for (int i = 0; i < names.length; i++ ) { |
| ProtocolVersion version = ProtocolVersion.valueOf(names[i]); |
| if (protocols.contains(version) == false) { |
| protocols.add(version); |
| } |
| } |
| if ((protocols.size() == 1) |
| && protocols.contains(ProtocolVersion.SSL20Hello)) { |
| throw new IllegalArgumentException("SSLv2Hello" + |
| "cannot be enabled unless TLSv1 or SSLv3 is also enabled"); |
| } |
| min = contains(ProtocolVersion.SSL30) ? ProtocolVersion.SSL30 |
| : ProtocolVersion.TLS10; |
| max = contains(ProtocolVersion.TLS10) ? ProtocolVersion.TLS10 |
| : ProtocolVersion.SSL30; |
| if (protocols.contains(ProtocolVersion.SSL20Hello)) { |
| helloVersion = ProtocolVersion.SSL20Hello; |
| } else { |
| helloVersion = min; |
| } |
| } |
| |
| /** |
| * Return whether this list contains the specified protocol version. |
| * SSLv2Hello is not a real protocol version we support, we always |
| * return false for it. |
| */ |
| boolean contains(ProtocolVersion protocolVersion) { |
| if (protocolVersion == ProtocolVersion.SSL20Hello) { |
| return false; |
| } |
| return protocols.contains(protocolVersion); |
| } |
| |
| /** |
| * Return an array with the names of the ProtocolVersions in this list. |
| */ |
| synchronized String[] toStringArray() { |
| if (protocolNames == null) { |
| protocolNames = new String[protocols.size()]; |
| int i = 0; |
| for (ProtocolVersion version : protocols) { |
| protocolNames[i++] = version.name; |
| } |
| } |
| return protocolNames.clone(); |
| } |
| |
| public String toString() { |
| return protocols.toString(); |
| } |
| |
| /** |
| * Return the list of default enabled protocols. Currently, this |
| * is identical to the supported protocols. |
| */ |
| static ProtocolList getDefault() { |
| return SUPPORTED; |
| } |
| |
| /** |
| * Return the list of supported protocols. |
| */ |
| static ProtocolList getSupported() { |
| return SUPPORTED; |
| } |
| |
| static { |
| if (SunJSSE.isFIPS()) { |
| SUPPORTED = new ProtocolList(new String[] { |
| ProtocolVersion.TLS10.name |
| }); |
| } else { |
| SUPPORTED = new ProtocolList(new String[] { |
| ProtocolVersion.SSL20Hello.name, |
| ProtocolVersion.SSL30.name, |
| ProtocolVersion.TLS10.name, |
| }); |
| } |
| } |
| |
| } |