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 

    26 package com.oracle.security.ucrypto;

    27 

    28 import java.nio.ByteBuffer;

    29 import java.util.Set;

    30 import java.util.Arrays;

    31 import java.util.concurrent.ConcurrentSkipListSet;

    32 import java.lang.ref.*;

    33 

    34 import java.security.*;

    35 import java.security.spec.*;

    36 import javax.crypto.*;

    37 

    38 import javax.crypto.spec.SecretKeySpec;

    39 import javax.crypto.spec.IvParameterSpec;

    40 

    41 /**

    42  * Internal class for context resource clean up.

    43  *

    44  * @since 1.9

    45  */

    46 final 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 }