1 /*

     2  * Copyright (c) 2005, 2018, 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 sun.security.mscapi;

    27 

    28 import sun.security.util.Length;

    29 

    30 import java.security.Key;

    31 

    32 /**

    33  * The handle for a key using the Microsoft Crypto API.

    34  *

    35  * @see CPrivateKey

    36  * @see CPublicKey

    37  *

    38  * @since 1.6

    39  * @author  Stanley Man-Kit Ho

    40  */

    41 abstract class CKey implements Key, Length {

    42     private static final long serialVersionUID = -1088859394025049194L;

    43 

    44     static class NativeHandles {

    45 

    46         long hCryptProv = 0;

    47         long hCryptKey = 0;

    48 

    49         public NativeHandles(long hCryptProv, long hCryptKey) {

    50             this.hCryptProv = hCryptProv;

    51             this.hCryptKey = hCryptKey;

    52         }

    53 

    54         @SuppressWarnings("deprecation")

    55         protected void finalize() throws Throwable {

    56             try {

    57                 synchronized(this) {

    58                     cleanUp(hCryptProv, hCryptKey);

    59                     hCryptProv = 0;

    60                     hCryptKey = 0;

    61                 }

    62             } finally {

    63                 super.finalize();

    64             }

    65         }

    66     }

    67 

    68     protected final NativeHandles handles;

    69 

    70     protected final int keyLength;

    71 

    72     protected final String algorithm;

    73 

    74     protected CKey(String algorithm, long hCryptProv, long hCryptKey, int keyLength) {

    75         this.algorithm = algorithm;

    76         this.handles = new NativeHandles(hCryptProv, hCryptKey);

    77         this.keyLength = keyLength;

    78     }

    79 

    80     // Native method to cleanup the key handle.

    81     private native static void cleanUp(long hCryptProv, long hCryptKey);

    82 

    83     @Override

    84     public int length() {

    85         return keyLength;

    86     }

    87 

    88     public long getHCryptKey() {

    89         return handles.hCryptKey;

    90     }

    91 

    92     public long getHCryptProvider() {

    93         return handles.hCryptProv;

    94     }

    95 

    96     public String getAlgorithm() {

    97         return algorithm;

    98     }

    99 

   100     protected native static String getContainerName(long hCryptProv);

   101 

   102     protected native static String getKeyType(long hCryptKey);

   103 }