1 /* SSLCipherSuite.java -- an SSL cipher suite. 2 Copyright (C) 2006 Free Software Foundation, Inc. 3 4 This file is a part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2 of the License, or (at 9 your option) any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 19 USA 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 39 package gnu.javax.net.ssl; 40 41 import gnu.java.security.Engine; 42 43 import java.lang.reflect.InvocationTargetException; 44 import java.nio.ByteBuffer; 45 import java.security.NoSuchAlgorithmException; 46 import java.security.Provider; 47 import java.security.Security; 48 49 /** 50 * An SSL cipher suite. 51 */ 52 public abstract class SSLCipherSuite 53 { 54 private static final String SERVICE = "SSLCipherSuite"; 55 private final String algorithm; 56 private final byte[] id; 57 private final SSLProtocolVersion version; 58 private Provider provider; 59 SSLCipherSuite(final String algorithm, final byte[] id, final SSLProtocolVersion version)60 protected SSLCipherSuite (final String algorithm, final byte[] id, 61 final SSLProtocolVersion version) 62 { 63 this.algorithm = algorithm; 64 if (id.length != 2) 65 throw new IllegalArgumentException ("cipher suite ID must be two bytes"); 66 this.id = (byte[]) id.clone (); 67 this.version = version; 68 } 69 getInstance(SSLProtocolVersion version, byte[] id)70 public static final SSLCipherSuite getInstance (SSLProtocolVersion version, byte[] id) 71 throws NoSuchAlgorithmException 72 { 73 return getInstance (version + "-" + ((id[0] & 0xFF) + "/" + (id[1] & 0xFF))); 74 } 75 getInstance(SSLProtocolVersion version, byte[] id, Provider provider)76 public static final SSLCipherSuite getInstance (SSLProtocolVersion version, 77 byte[] id, Provider provider) 78 throws NoSuchAlgorithmException 79 { 80 return getInstance (version + "-" + (id[0] & 0xFF) + "/" + (id[1] & 0xFF), provider); 81 } 82 getInstance(String name)83 public static final SSLCipherSuite getInstance (String name) 84 throws NoSuchAlgorithmException 85 { 86 Provider[] providers = Security.getProviders (); 87 for (int i = 0; i < providers.length; i++) 88 { 89 try 90 { 91 return getInstance (name, providers[i]); 92 } 93 catch (NoSuchAlgorithmException nsae) 94 { 95 // Ignore. 96 } 97 } 98 99 throw new NoSuchAlgorithmException (SERVICE + ": " + name); 100 } 101 getInstance(String name, Provider provider)102 public static final SSLCipherSuite getInstance (String name, Provider provider) 103 throws NoSuchAlgorithmException 104 { 105 SSLCipherSuite suite = null; 106 try 107 { 108 suite = (SSLCipherSuite) Engine.getInstance (SERVICE, name, provider); 109 suite.provider = provider; 110 } 111 catch (InvocationTargetException ite) 112 { 113 // XXX 114 NoSuchAlgorithmException nsae = new NoSuchAlgorithmException (name); 115 nsae.initCause (ite); 116 throw nsae; 117 } 118 return suite; 119 } 120 getAlgorithm()121 public final String getAlgorithm () 122 { 123 return algorithm; 124 } 125 getId()126 public final byte[] getId () 127 { 128 return (byte[]) id.clone (); 129 } 130 getProvider()131 public final Provider getProvider () 132 { 133 return provider; 134 } 135 getProtocolVersion()136 public final SSLProtocolVersion getProtocolVersion () 137 { 138 return version; 139 } 140 encipher(ByteBuffer in, ByteBuffer out)141 public abstract void encipher (ByteBuffer in, ByteBuffer out); 142 } 143