1/* 2 * Copyright (c) 2014, 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 26package com.oracle.security.ucrypto; 27 28import java.nio.ByteBuffer; 29import java.util.Set; 30import java.util.Arrays; 31import java.util.concurrent.ConcurrentSkipListSet; 32import java.lang.ref.*; 33 34import java.security.*; 35import java.security.spec.*; 36import javax.crypto.*; 37 38import javax.crypto.spec.SecretKeySpec; 39import javax.crypto.spec.IvParameterSpec; 40 41/** 42 * Internal class for context resource clean up. 43 * 44 * @since 9 45 */ 46final class CipherContextRef extends PhantomReference<NativeCipher> 47 implements Comparable<CipherContextRef> { 48 49 private static ReferenceQueue<NativeCipher> refQueue = 50 new ReferenceQueue<NativeCipher>(); 51 52 // Needed to keep these references from being GC'ed until when their 53 // referents are GC'ed so we can do post-mortem processing 54 private static Set<CipherContextRef> refList = 55 new ConcurrentSkipListSet<CipherContextRef>(); 56 57 final long id; 58 final boolean encrypt; 59 60 private static void drainRefQueueBounded() { 61 while (true) { 62 CipherContextRef next = (CipherContextRef) refQueue.poll(); 63 if (next == null) break; 64 next.dispose(true); 65 } 66 } 67 68 CipherContextRef(NativeCipher nc, long id, boolean encrypt) { 69 super(nc, refQueue); 70 this.id = id; 71 this.encrypt = encrypt; 72 refList.add(this); 73 UcryptoProvider.debug("Resource: trace CipherCtxt " + this.id); 74 drainRefQueueBounded(); 75 } 76 77 public int compareTo(CipherContextRef other) { 78 if (this.id == other.id) { 79 return 0; 80 } else { 81 return (this.id < other.id) ? -1 : 1; 82 } 83 } 84 85 void dispose(boolean doCancel) { 86 refList.remove(this); 87 try { 88 if (doCancel) { 89 UcryptoProvider.debug("Resource: cancel CipherCtxt " + id); 90 int k = NativeCipher.nativeFinal(id, encrypt, null, 0); 91 if (k < 0) { 92 UcryptoProvider.debug 93 ("Resource: error cancelling CipherCtxt " + id + 94 " " + new UcryptoException(-k).getMessage()); 95 } 96 } else { 97 UcryptoProvider.debug("Resource: untrace CipherCtxt " + id); 98 } 99 } finally { 100 this.clear(); 101 } 102 } 103} 104