1 /* |
|
2 * Copyright (c) 2010, 2013, 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 * This file is available under and governed by the GNU General Public |
|
28 * License version 2 only, as published by the Free Software Foundation. |
|
29 * However, the following notice accompanied the original version of this |
|
30 * file, and Oracle licenses the original version of this file under the BSD |
|
31 * license: |
|
32 */ |
|
33 /* |
|
34 Copyright 2009-2013 Attila Szegedi |
|
35 |
|
36 Licensed under both the Apache License, Version 2.0 (the "Apache License") |
|
37 and the BSD License (the "BSD License"), with licensee being free to |
|
38 choose either of the two at their discretion. |
|
39 |
|
40 You may not use this file except in compliance with either the Apache |
|
41 License or the BSD License. |
|
42 |
|
43 If you choose to use this file in compliance with the Apache License, the |
|
44 following notice applies to you: |
|
45 |
|
46 You may obtain a copy of the Apache License at |
|
47 |
|
48 http://www.apache.org/licenses/LICENSE-2.0 |
|
49 |
|
50 Unless required by applicable law or agreed to in writing, software |
|
51 distributed under the License is distributed on an "AS IS" BASIS, |
|
52 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
|
53 implied. See the License for the specific language governing |
|
54 permissions and limitations under the License. |
|
55 |
|
56 If you choose to use this file in compliance with the BSD License, the |
|
57 following notice applies to you: |
|
58 |
|
59 Redistribution and use in source and binary forms, with or without |
|
60 modification, are permitted provided that the following conditions are |
|
61 met: |
|
62 * Redistributions of source code must retain the above copyright |
|
63 notice, this list of conditions and the following disclaimer. |
|
64 * Redistributions in binary form must reproduce the above copyright |
|
65 notice, this list of conditions and the following disclaimer in the |
|
66 documentation and/or other materials provided with the distribution. |
|
67 * Neither the name of the copyright holder nor the names of |
|
68 contributors may be used to endorse or promote products derived from |
|
69 this software without specific prior written permission. |
|
70 |
|
71 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
|
72 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
|
73 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
|
74 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER |
|
75 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
|
76 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
|
77 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
|
78 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
|
79 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
|
80 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
|
81 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
82 */ |
|
83 |
|
84 package jdk.internal.dynalink.beans; |
|
85 |
|
86 import java.lang.invoke.MethodHandle; |
|
87 import java.lang.reflect.Constructor; |
|
88 import java.lang.reflect.Field; |
|
89 import java.lang.reflect.Method; |
|
90 import java.security.AccessController; |
|
91 import java.security.PrivilegedAction; |
|
92 import jdk.internal.dynalink.beans.sandbox.Unreflector; |
|
93 |
|
94 /** |
|
95 * Provides lookup of unreflected method handles through delegation to an instance of {@link SafeUnreflectorImpl}. If |
|
96 * Dynalink is run as trusted code, the delegate class is loaded into an isolated zero-permissions protection domain, |
|
97 * serving as a firebreak against an accidental privilege escalation downstream. |
|
98 */ |
|
99 final class SafeUnreflector { |
|
100 private static final String UNREFLECTOR_IMPL_CLASS_NAME = "jdk.internal.dynalink.beans.SafeUnreflectorImpl"; |
|
101 private static final Unreflector impl = createImpl(); |
|
102 |
|
103 private SafeUnreflector() { |
|
104 } |
|
105 |
|
106 /** |
|
107 * Performs a {@link java.lang.invoke.MethodHandles.Lookup#unreflect(Method)}, converting any encountered |
|
108 * {@link IllegalAccessException} into an {@link IllegalAccessError}. |
|
109 * |
|
110 * @param m the method to unreflect |
|
111 * @return the unreflected method handle. |
|
112 */ |
|
113 static MethodHandle unreflect(Method m) { |
|
114 return impl.unreflect(m); |
|
115 } |
|
116 |
|
117 /** |
|
118 * Performs a {@link java.lang.invoke.MethodHandles.Lookup#unreflectGetter(Field)}, converting any encountered |
|
119 * {@link IllegalAccessException} into an {@link IllegalAccessError}. |
|
120 * |
|
121 * @param f the field for which a getter is unreflected |
|
122 * @return the unreflected field getter handle. |
|
123 */ |
|
124 static MethodHandle unreflectGetter(Field f) { |
|
125 return impl.unreflectGetter(f); |
|
126 } |
|
127 |
|
128 /** |
|
129 * Performs a {@link java.lang.invoke.MethodHandles.Lookup#unreflectSetter(Field)}, converting any encountered |
|
130 * {@link IllegalAccessException} into an {@link IllegalAccessError}. |
|
131 * |
|
132 * @param f the field for which a setter is unreflected |
|
133 * @return the unreflected field setter handle. |
|
134 */ |
|
135 static MethodHandle unreflectSetter(Field f) { |
|
136 return impl.unreflectSetter(f); |
|
137 } |
|
138 |
|
139 static MethodHandle unreflectConstructor(Constructor<?> c) { |
|
140 return impl.unreflectConstructor(c); |
|
141 } |
|
142 |
|
143 private static Unreflector createImpl() { |
|
144 final Class<?> unreflectorImplClass = AccessController.doPrivileged(new PrivilegedAction<Class<?>>() { |
|
145 @Override |
|
146 public Class<?> run() { |
|
147 return SandboxClassLoader.loadClass(UNREFLECTOR_IMPL_CLASS_NAME); |
|
148 } |
|
149 }); |
|
150 try { |
|
151 return (Unreflector)unreflectorImplClass.newInstance(); |
|
152 } catch(InstantiationException | IllegalAccessException e) { |
|
153 throw new RuntimeException(e.getMessage(), e); |
|
154 } |
|
155 } |
|
156 } |
|