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| 1 | /* | ||
| 2 | * Copyright (c) 1996, 2008, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * 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 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 | } | ||