J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1996-2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | |
| 27 | package sun.security.ssl; |
| 28 | |
| 29 | import java.security.SecureRandom; |
| 30 | |
| 31 | /** |
| 32 | * Encapsulates an SSL session ID. SSL Session IDs are not reused by |
| 33 | * servers during the lifetime of any sessions it created. Sessions may |
| 34 | * be used by many connections, either concurrently (for example, two |
| 35 | * connections to a web server at the same time) or sequentially (over as |
| 36 | * long a time period as is allowed by a given server). |
| 37 | * |
| 38 | * @author Satish Dharmaraj |
| 39 | * @author David Brownell |
| 40 | */ |
| 41 | final |
| 42 | class SessionId |
| 43 | { |
| 44 | private byte sessionId []; // max 32 bytes |
| 45 | |
| 46 | /** Constructs a new session ID ... perhaps for a rejoinable session */ |
| 47 | SessionId (boolean isRejoinable, SecureRandom generator) |
| 48 | { |
| 49 | if (isRejoinable) |
| 50 | // this will be unique, it's a timestamp plus much randomness |
| 51 | sessionId = new RandomCookie (generator).random_bytes; |
| 52 | else |
| 53 | sessionId = new byte [0]; |
| 54 | } |
| 55 | |
| 56 | /** Constructs a session ID from a byte array (max size 32 bytes) */ |
| 57 | SessionId (byte sessionId []) |
| 58 | { this.sessionId = sessionId; } |
| 59 | |
| 60 | /** Returns the length of the ID, in bytes */ |
| 61 | int length () |
| 62 | { return sessionId.length; } |
| 63 | |
| 64 | /** Returns the bytes in the ID. May be an empty array. */ |
| 65 | byte [] getId () |
| 66 | { |
| 67 | return (byte []) sessionId.clone (); |
| 68 | } |
| 69 | |
| 70 | /** Returns the ID as a string */ |
| 71 | public String toString () |
| 72 | { |
| 73 | int len = sessionId.length; |
| 74 | StringBuffer s = new StringBuffer (10 + 2 * len); |
| 75 | |
| 76 | s.append ("{"); |
| 77 | for (int i = 0; i < len; i++) { |
| 78 | s.append (0x0ff & sessionId [i]); |
| 79 | if (i != (len - 1)) |
| 80 | s.append (", "); |
| 81 | } |
| 82 | s.append ("}"); |
| 83 | return s.toString (); |
| 84 | } |
| 85 | |
| 86 | |
| 87 | /** Returns a value which is the same for session IDs which are equal */ |
| 88 | public int hashCode () |
| 89 | { |
| 90 | int retval = 0; |
| 91 | |
| 92 | for (int i = 0; i < sessionId.length; i++) |
| 93 | retval += sessionId [i]; |
| 94 | return retval; |
| 95 | } |
| 96 | |
| 97 | /** Returns true if the parameter is the same session ID */ |
| 98 | public boolean equals (Object obj) |
| 99 | { |
| 100 | if (!(obj instanceof SessionId)) |
| 101 | return false; |
| 102 | |
| 103 | SessionId s = (SessionId) obj; |
| 104 | byte b [] = s.getId (); |
| 105 | |
| 106 | if (b.length != sessionId.length) |
| 107 | return false; |
| 108 | for (int i = 0; i < sessionId.length; i++) { |
| 109 | if (b [i] != sessionId [i]) |
| 110 | return false; |
| 111 | } |
| 112 | return true; |
| 113 | } |
| 114 | } |