1 /*
2 * Copyright 2014 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package io.netty.handler.ssl;
17
18 import java.util.ArrayList;
19 import java.util.List;
20 import java.util.Set;
21
22 /**
23 * This class will not do any filtering of ciphers suites.
24 */
25 public final class IdentityCipherSuiteFilter implements CipherSuiteFilter {
26
27 /**
28 * Defaults to default ciphers when provided ciphers are null
29 */
30 public static final IdentityCipherSuiteFilter INSTANCE = new IdentityCipherSuiteFilter(true);
31
32 /**
33 * Defaults to supported ciphers when provided ciphers are null
34 */
35 public static final IdentityCipherSuiteFilter INSTANCE_DEFAULTING_TO_SUPPORTED_CIPHERS =
36 new IdentityCipherSuiteFilter(false);
37
38 private final boolean defaultToDefaultCiphers;
39
40 private IdentityCipherSuiteFilter(boolean defaultToDefaultCiphers) {
41 this.defaultToDefaultCiphers = defaultToDefaultCiphers;
42 }
43
44 @Override
45 public String[] filterCipherSuites(Iterable<String> ciphers, List<String> defaultCiphers,
46 Set<String> supportedCiphers) {
47 if (ciphers == null) {
48 return defaultToDefaultCiphers ?
49 defaultCiphers.toArray(new String[0]) :
50 supportedCiphers.toArray(new String[0]);
51 } else {
52 List<String> newCiphers = new ArrayList<String>(supportedCiphers.size());
53 for (String c : ciphers) {
54 if (c == null) {
55 break;
56 }
57 newCiphers.add(c);
58 }
59 return newCiphers.toArray(new String[0]);
60 }
61 }
62 }
63