| /* KeyAgreementFactory.java -- |
| Copyright (C) 2003, 2006 Free Software Foundation, Inc. |
| |
| This file is a part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or (at |
| your option) any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 |
| USA |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.javax.crypto.key; |
| |
| import gnu.java.security.Registry; |
| |
| import gnu.javax.crypto.key.dh.DiffieHellmanSender; |
| import gnu.javax.crypto.key.dh.DiffieHellmanReceiver; |
| import gnu.javax.crypto.key.dh.ElGamalSender; |
| import gnu.javax.crypto.key.dh.ElGamalReceiver; |
| import gnu.javax.crypto.key.srp6.SRP6Host; |
| import gnu.javax.crypto.key.srp6.SRP6User; |
| import gnu.javax.crypto.key.srp6.SRP6SaslClient; |
| import gnu.javax.crypto.key.srp6.SRP6SaslServer; |
| import gnu.javax.crypto.key.srp6.SRP6TLSClient; |
| import gnu.javax.crypto.key.srp6.SRP6TLSServer; |
| |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * A <i>Factory</i> class to generate key agreement protocol handlers. |
| */ |
| public class KeyAgreementFactory |
| { |
| /** Trivial constructor to enforce <i>Singleton</i> pattern. */ |
| private KeyAgreementFactory() |
| { |
| super(); |
| } |
| |
| /** |
| * Returns an instance of a key agreeent protocol handler, for party |
| * <code>A</code> in a two-party <code>A..B</code> exchange, given the |
| * canonical name of this protocol. Party <code>A</code> is usually the |
| * initiator of the exchange. |
| * |
| * @param name the case-insensitive key agreement protocol name. |
| * @return an instance of the key agreement protocol handler for party |
| * <code>A</code>, or <code>null</code> if none found. |
| */ |
| public static IKeyAgreementParty getPartyAInstance(String name) |
| { |
| if (name == null) |
| return null; |
| name = name.trim(); |
| IKeyAgreementParty result = null; |
| if (name.equalsIgnoreCase(Registry.DH_KA)) |
| result = new DiffieHellmanSender(); |
| else if (name.equalsIgnoreCase(Registry.ELGAMAL_KA)) |
| result = new ElGamalSender(); |
| else if (name.equalsIgnoreCase(Registry.SRP6_KA)) |
| result = new SRP6User(); |
| else if (name.equalsIgnoreCase(Registry.SRP_SASL_KA)) |
| result = new SRP6SaslClient(); |
| else if (name.equalsIgnoreCase(Registry.SRP_TLS_KA)) |
| result = new SRP6TLSClient(); |
| return result; |
| } |
| |
| /** |
| * Returns an instance of a key agreeent protocol handler, for party |
| * <code>B</code> in a two-party <code>A..B</code> exchange, given the |
| * canonical name of this protocol. |
| * |
| * @param name the case-insensitive key agreement protocol name. |
| * @return an instance of the key agreement protocol handler for party |
| * <code>B</code>, or <code>null</code> if none found. |
| */ |
| public static IKeyAgreementParty getPartyBInstance(String name) |
| { |
| if (name == null) |
| return null; |
| name = name.trim(); |
| IKeyAgreementParty result = null; |
| if (name.equalsIgnoreCase(Registry.DH_KA)) |
| result = new DiffieHellmanReceiver(); |
| else if (name.equalsIgnoreCase(Registry.ELGAMAL_KA)) |
| result = new ElGamalReceiver(); |
| else if (name.equalsIgnoreCase(Registry.SRP6_KA)) |
| result = new SRP6Host(); |
| else if (name.equalsIgnoreCase(Registry.SRP_SASL_KA)) |
| result = new SRP6SaslServer(); |
| else if (name.equalsIgnoreCase(Registry.SRP_TLS_KA)) |
| result = new SRP6TLSServer(); |
| return result; |
| } |
| |
| /** |
| * Returns a {@link Set} of key agreement protocol names supported by this |
| * <i>Factory</i>. |
| * |
| * @return a {@link Set} of key agreement protocol names (Strings). |
| */ |
| public static final Set getNames() |
| { |
| HashSet hs = new HashSet(); |
| hs.add(Registry.DH_KA); |
| hs.add(Registry.ELGAMAL_KA); |
| hs.add(Registry.SRP6_KA); |
| hs.add(Registry.SRP_SASL_KA); |
| hs.add(Registry.SRP_TLS_KA); |
| |
| return Collections.unmodifiableSet(hs); |
| } |
| } |