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| 1 | /* | ||
| 2 | * Copyright (c) 2002, 2011, 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 | package sun.security.ssl; | ||
| 28 | |||
| 29 | import java.io.*; | ||
| 30 | import java.util.*; | ||
| 31 | |||
| 32 | import javax.net.ssl.SSLException; | ||
| 33 | |||
| 34 | /** | ||
| 35 | * A list of CipherSuites. Also maintains the lists of supported and | ||
| 36 | * default ciphersuites and supports I/O from handshake streams. | ||
| 37 | * | ||
| 38 | * Instances of this class are immutable. | ||
| 39 | * | ||
| 40 | */ | ||
| 41 | final class CipherSuiteList { | ||
| 42 | |||
| 43 | private final Collection<CipherSuite> cipherSuites; | ||
| 44 | private String[] suiteNames; | ||
| 45 | |||
| 46 | // flag indicating whether this list contains any ECC ciphersuites. | ||
| 47 | // null if not yet checked. | ||
| 48 | private volatile Boolean containsEC; | ||
| 49 | |||
| 50 | // for use by buildAvailableCache() and | ||
| 51 | // Handshaker.getKickstartMessage() only | ||
| 52 | CipherSuiteList(Collection<CipherSuite> cipherSuites) { | ||
| 53 | this.cipherSuites = cipherSuites; | ||
| 54 | } | ||
| 55 | |||
| 56 | /** | ||
| 57 | * Create a CipherSuiteList with a single element. | ||
| 58 | */ | ||
| 59 | CipherSuiteList(CipherSuite suite) { | ||
| 60 | cipherSuites = new ArrayList<CipherSuite>(1); | ||
| 61 | cipherSuites.add(suite); | ||
| 62 | } | ||
| 63 | |||
| 64 | /** | ||
| 65 | * Construct a CipherSuiteList from a array of names. We don't bother | ||
| 66 | * to eliminate duplicates. | ||
| 67 | * | ||
| 68 | * @exception IllegalArgumentException if the array or any of its elements | ||
| 69 | * is null or if the ciphersuite name is unrecognized or unsupported | ||
| 70 | * using currently installed providers. | ||
| 71 | */ | ||
| 72 | CipherSuiteList(String[] names) { | ||
| 73 | if (names == null) { | ||
| 74 | throw new IllegalArgumentException("CipherSuites may not be null"); | ||
| 75 | } | ||
| 76 | cipherSuites = new ArrayList<CipherSuite>(names.length); | ||
| 77 | // refresh available cache once if a CipherSuite is not available | ||
| 78 | // (maybe new JCE providers have been installed) | ||
| 79 | boolean refreshed = false; | ||
| 80 | for (int i = 0; i < names.length; i++) { | ||
| 81 | String suiteName = names[i]; | ||
| 82 | CipherSuite suite = CipherSuite.valueOf(suiteName); | ||
| 83 | if (suite.isAvailable() == false) { | ||
| 84 | if (refreshed == false) { | ||
| 85 | // clear the cache so that the isAvailable() call below | ||
| 86 | // does a full check | ||
| 87 | clearAvailableCache(); | ||
| 88 | refreshed = true; | ||
| 89 | } | ||
| 90 | // still missing? | ||
| 91 | if (suite.isAvailable() == false) { | ||
| 92 | throw new IllegalArgumentException("Cannot support " | ||
| 93 | + suiteName + " with currently installed providers"); | ||
| 94 | } | ||
| 95 | } | ||
| 96 | cipherSuites.add(suite); | ||
| 97 | } | ||
| 98 | } | ||
| 99 | |||
| 100 | /** | ||
| 101 | * Read a CipherSuiteList from a HandshakeInStream in V3 ClientHello | ||
| 102 | * format. Does not check if the listed ciphersuites are known or | ||
| 103 | * supported. | ||
| 104 | */ | ||
| 105 | CipherSuiteList(HandshakeInStream in) throws IOException { | ||
| 106 | byte[] bytes = in.getBytes16(); | ||
| 107 | if ((bytes.length & 1) != 0) { | ||
| 108 | throw new SSLException("Invalid ClientHello message"); | ||
| 109 | } | ||
| 110 | cipherSuites = new ArrayList<CipherSuite>(bytes.length >> 1); | ||
| 111 | for (int i = 0; i < bytes.length; i += 2) { | ||
| 112 | cipherSuites.add(CipherSuite.valueOf(bytes[i], bytes[i+1])); | ||
| 113 | } | ||
| 114 | } | ||
| 115 | |||
| 116 | /** | ||
| 117 | * Return whether this list contains the given CipherSuite. | ||
| 118 | */ | ||
| 119 | boolean contains(CipherSuite suite) { | ||
| 120 | return cipherSuites.contains(suite); | ||
| 121 | } | ||
| 122 | |||
| 123 | // Return whether this list contains any ECC ciphersuites | ||
| 124 | boolean containsEC() { | ||
| 125 | if (containsEC == null) { | ||
| 126 | for (CipherSuite c : cipherSuites) { | ||
| 127 | switch (c.keyExchange) { | ||
| 128 | case K_ECDH_ECDSA: | ||
| 129 | case K_ECDH_RSA: | ||
| 130 | case K_ECDHE_ECDSA: | ||
| 131 | case K_ECDHE_RSA: | ||
| 132 | case K_ECDH_ANON: | ||
| 133 | containsEC = true; | ||
| 134 | return true; | ||
| 135 | default: | ||
| 136 | break; | ||
| 137 | } | ||
| 138 | } | ||
| 139 | containsEC = false; | ||
| 140 | } | ||
| 141 | return containsEC; | ||
| 142 | } | ||
| 143 | |||
| 144 | /** | ||
| 145 | * Return an Iterator for the CipherSuites in this list. | ||
| 146 | */ | ||
| 147 | Iterator<CipherSuite> iterator() { | ||
| 148 | return cipherSuites.iterator(); | ||
| 149 | } | ||
| 150 | |||
| 151 | /** | ||
| 152 | * Return a reference to the internal Collection of CipherSuites. | ||
| 153 | * The Collection MUST NOT be modified. | ||
| 154 | */ | ||
| 155 | Collection<CipherSuite> collection() { | ||
| 156 | return cipherSuites; | ||
| 157 | } | ||
| 158 | |||
| 159 | /** | ||
| 160 | * Return the number of CipherSuites in this list. | ||
| 161 | */ | ||
| 162 | int size() { | ||
| 163 | return cipherSuites.size(); | ||
| 164 | } | ||
| 165 | |||
| 166 | /** | ||
| 167 | * Return an array with the names of the CipherSuites in this list. | ||
| 168 | */ | ||
| 169 | synchronized String[] toStringArray() { | ||
| 170 | if (suiteNames == null) { | ||
| 171 | suiteNames = new String[cipherSuites.size()]; | ||
| 172 | int i = 0; | ||
| 173 | for (CipherSuite c : cipherSuites) { | ||
| 174 | suiteNames[i++] = c.name; | ||
| 175 | } | ||
| 176 | } | ||
| 177 | return suiteNames.clone(); | ||
| 178 | } | ||
| 179 | |||
| 180 | public String toString() { | ||
| 181 | return cipherSuites.toString(); | ||
| 182 | } | ||
| 183 | |||
| 184 | /** | ||
| 185 | * Write this list to an HandshakeOutStream in V3 ClientHello format. | ||
| 186 | */ | ||
| 187 | void send(HandshakeOutStream s) throws IOException { | ||
| 188 | byte[] suiteBytes = new byte[cipherSuites.size() * 2]; | ||
| 189 | int i = 0; | ||
| 190 | for (CipherSuite c : cipherSuites) { | ||
| 191 | suiteBytes[i] = (byte)(c.id >> 8); | ||
| 192 | suiteBytes[i+1] = (byte)c.id; | ||
| 193 | i += 2; | ||
| 194 | } | ||
| 195 | s.putBytes16(suiteBytes); | ||
| 196 | } | ||
| 197 | |||
| 198 | /** | ||
| 199 | * Clear cache of available ciphersuites. If we support all ciphers | ||
| 200 | * internally, there is no need to clear the cache and calling this | ||
| 201 | * method has no effect. | ||
| 202 | */ | ||
| 203 | static synchronized void clearAvailableCache() { | ||
| 204 | if (CipherSuite.DYNAMIC_AVAILABILITY) { | ||
| 205 | CipherSuite.BulkCipher.clearAvailableCache(); | ||
| 206 | JsseJce.clearEcAvailable(); | ||
| 207 | } | ||
| 208 | } | ||
| 209 | } | ||