1 /*
2 * Copyright (C) 2018, Thomas Wolf <thomas.wolf@paranor.ch>
3 * and other copyright owners as documented in the project's IP log.
4 *
5 * This program and the accompanying materials are made available
6 * under the terms of the Eclipse Distribution License v1.0 which
7 * accompanies this distribution, is reproduced below, and is
8 * available at http://www.eclipse.org/org/documents/edl-v10.php
9 *
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials provided
22 * with the distribution.
23 *
24 * - Neither the name of the Eclipse Foundation, Inc. nor the
25 * names of its contributors may be used to endorse or promote
26 * products derived from this software without specific prior
27 * written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
34 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43 package org.eclipse.jgit.transport.sshd;
44
45 import java.nio.file.Path;
46 import java.security.KeyPair;
47 import java.security.PrivateKey;
48 import java.util.Map;
49 import java.util.concurrent.ConcurrentHashMap;
50 import java.util.concurrent.atomic.AtomicReference;
51 import java.util.function.Function;
52
53 import javax.security.auth.DestroyFailedException;
54
55 /**
56 * A simple {@link KeyCache}. JGit uses one such cache in its
57 * {@link SshdSessionFactory} to avoid loading keys multiple times.
58 *
59 * @since 5.2
60 */
61 public class JGitKeyCache implements KeyCache {
62
63 private AtomicReference<Map<Path, KeyPair>> cache = new AtomicReference<>(
64 new ConcurrentHashMap<>());
65
66 @Override
67 public KeyPair get(Path path,
68 Function<? super Path, ? extends KeyPair> loader) {
69 return cache.get().computeIfAbsent(path, loader);
70 }
71
72 @Override
73 public void close() {
74 Map<Path, KeyPair> map = cache.getAndSet(null);
75 if (map == null) {
76 return;
77 }
78 for (KeyPair k : map.values()) {
79 PrivateKey p = k.getPrivate();
80 try {
81 p.destroy();
82 } catch (DestroyFailedException e) {
83 // Ignore here. We did our best.
84 }
85 }
86 map.clear();
87 }
88 }