31689
|
1 |
/*
|
|
2 |
* Copyright (c) 2015, 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.util;
|
|
27 |
|
|
28 |
import java.security.AccessController;
|
|
29 |
import java.security.AlgorithmConstraints;
|
|
30 |
import java.security.PrivilegedAction;
|
|
31 |
import java.security.Security;
|
|
32 |
import java.util.Map;
|
|
33 |
import java.util.Set;
|
|
34 |
|
|
35 |
/**
|
|
36 |
* The class contains common functionality for algorithm constraints classes.
|
|
37 |
*/
|
|
38 |
public abstract class AbstractAlgorithmConstraints
|
|
39 |
implements AlgorithmConstraints {
|
|
40 |
|
|
41 |
protected final AlgorithmDecomposer decomposer;
|
|
42 |
|
|
43 |
protected AbstractAlgorithmConstraints(AlgorithmDecomposer decomposer) {
|
|
44 |
this.decomposer = decomposer;
|
|
45 |
}
|
|
46 |
|
|
47 |
// Get algorithm constraints from the specified security property.
|
|
48 |
private static void loadAlgorithmsMap(Map<String, String[]> algorithmsMap,
|
|
49 |
String propertyName) {
|
|
50 |
String property = AccessController.doPrivileged(
|
|
51 |
(PrivilegedAction<String>) () -> Security.getProperty(
|
|
52 |
propertyName));
|
|
53 |
|
|
54 |
String[] algorithmsInProperty = null;
|
|
55 |
if (property != null && !property.isEmpty()) {
|
|
56 |
// remove double quote marks from beginning/end of the property
|
|
57 |
if (property.charAt(0) == '"'
|
|
58 |
&& property.charAt(property.length() - 1) == '"') {
|
|
59 |
property = property.substring(1, property.length() - 1);
|
|
60 |
}
|
|
61 |
algorithmsInProperty = property.split(",");
|
|
62 |
for (int i = 0; i < algorithmsInProperty.length;
|
|
63 |
i++) {
|
|
64 |
algorithmsInProperty[i] = algorithmsInProperty[i].trim();
|
|
65 |
}
|
|
66 |
}
|
|
67 |
|
|
68 |
// map the disabled algorithms
|
|
69 |
if (algorithmsInProperty == null) {
|
|
70 |
algorithmsInProperty = new String[0];
|
|
71 |
}
|
|
72 |
algorithmsMap.put(propertyName, algorithmsInProperty);
|
|
73 |
}
|
|
74 |
|
|
75 |
static String[] getAlgorithms(Map<String, String[]> algorithmsMap,
|
|
76 |
String propertyName) {
|
|
77 |
synchronized (algorithmsMap) {
|
|
78 |
if (!algorithmsMap.containsKey(propertyName)) {
|
|
79 |
loadAlgorithmsMap(algorithmsMap, propertyName);
|
|
80 |
}
|
|
81 |
|
|
82 |
return algorithmsMap.get(propertyName);
|
|
83 |
}
|
|
84 |
}
|
|
85 |
|
|
86 |
static boolean checkAlgorithm(String[] algorithms, String algorithm,
|
|
87 |
AlgorithmDecomposer decomposer) {
|
|
88 |
if (algorithm == null || algorithm.length() == 0) {
|
|
89 |
throw new IllegalArgumentException("No algorithm name specified");
|
|
90 |
}
|
|
91 |
|
|
92 |
Set<String> elements = null;
|
|
93 |
for (String item : algorithms) {
|
|
94 |
if (item == null || item.isEmpty()) {
|
|
95 |
continue;
|
|
96 |
}
|
|
97 |
|
|
98 |
// check the full name
|
|
99 |
if (item.equalsIgnoreCase(algorithm)) {
|
|
100 |
return false;
|
|
101 |
}
|
|
102 |
|
|
103 |
// decompose the algorithm into sub-elements
|
|
104 |
if (elements == null) {
|
|
105 |
elements = decomposer.decompose(algorithm);
|
|
106 |
}
|
|
107 |
|
|
108 |
// check the items of the algorithm
|
|
109 |
for (String element : elements) {
|
|
110 |
if (item.equalsIgnoreCase(element)) {
|
|
111 |
return false;
|
|
112 |
}
|
|
113 |
}
|
|
114 |
}
|
|
115 |
|
|
116 |
return true;
|
|
117 |
}
|
|
118 |
|
|
119 |
}
|