--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/security/ssl/CipherSuiteList.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,258 @@
+/*
+ * Copyright 2002-2007 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+
+package sun.security.ssl;
+
+import java.io.*;
+import java.util.*;
+
+import javax.net.ssl.SSLException;
+
+/**
+ * A list of CipherSuites. Also maintains the lists of supported and
+ * default ciphersuites and supports I/O from handshake streams.
+ *
+ * Instances of this class are immutable.
+ *
+ */
+final class CipherSuiteList {
+
+ // lists of supported and default enabled ciphersuites
+ // created on demand
+ private static CipherSuiteList supportedSuites, defaultSuites;
+
+ private final Collection<CipherSuite> cipherSuites;
+ private String[] suiteNames;
+
+ // flag indicating whether this list contains any ECC ciphersuites.
+ // null if not yet checked.
+ private volatile Boolean containsEC;
+
+ // for use by buildAvailableCache() only
+ private CipherSuiteList(Collection<CipherSuite> cipherSuites) {
+ this.cipherSuites = cipherSuites;
+ }
+
+ /**
+ * Create a CipherSuiteList with a single element.
+ */
+ CipherSuiteList(CipherSuite suite) {
+ cipherSuites = new ArrayList<CipherSuite>(1);
+ cipherSuites.add(suite);
+ }
+
+ /**
+ * Construct a CipherSuiteList from a array of names. We don't bother
+ * to eliminate duplicates.
+ *
+ * @exception IllegalArgumentException if the array or any of its elements
+ * is null or if the ciphersuite name is unrecognized or unsupported
+ * using currently installed providers.
+ */
+ CipherSuiteList(String[] names) {
+ if (names == null) {
+ throw new IllegalArgumentException("CipherSuites may not be null");
+ }
+ cipherSuites = new ArrayList<CipherSuite>(names.length);
+ // refresh available cache once if a CipherSuite is not available
+ // (maybe new JCE providers have been installed)
+ boolean refreshed = false;
+ for (int i = 0; i < names.length; i++) {
+ String suiteName = names[i];
+ CipherSuite suite = CipherSuite.valueOf(suiteName);
+ if (suite.isAvailable() == false) {
+ if (refreshed == false) {
+ // clear the cache so that the isAvailable() call below
+ // does a full check
+ clearAvailableCache();
+ refreshed = true;
+ }
+ // still missing?
+ if (suite.isAvailable() == false) {
+ throw new IllegalArgumentException("Cannot support "
+ + suiteName + " with currently installed providers");
+ }
+ }
+ cipherSuites.add(suite);
+ }
+ }
+
+ /**
+ * Read a CipherSuiteList from a HandshakeInStream in V3 ClientHello
+ * format. Does not check if the listed ciphersuites are known or
+ * supported.
+ */
+ CipherSuiteList(HandshakeInStream in) throws IOException {
+ byte[] bytes = in.getBytes16();
+ if ((bytes.length & 1) != 0) {
+ throw new SSLException("Invalid ClientHello message");
+ }
+ cipherSuites = new ArrayList<CipherSuite>(bytes.length >> 1);
+ for (int i = 0; i < bytes.length; i += 2) {
+ cipherSuites.add(CipherSuite.valueOf(bytes[i], bytes[i+1]));
+ }
+ }
+
+ /**
+ * Return whether this list contains the given CipherSuite.
+ */
+ boolean contains(CipherSuite suite) {
+ return cipherSuites.contains(suite);
+ }
+
+ // Return whether this list contains any ECC ciphersuites
+ boolean containsEC() {
+ if (containsEC == null) {
+ for (CipherSuite c : cipherSuites) {
+ switch (c.keyExchange) {
+ case K_ECDH_ECDSA:
+ case K_ECDH_RSA:
+ case K_ECDHE_ECDSA:
+ case K_ECDHE_RSA:
+ case K_ECDH_ANON:
+ containsEC = true;
+ return true;
+ default:
+ break;
+ }
+ }
+ containsEC = false;
+ }
+ return containsEC;
+ }
+
+ /**
+ * Return an Iterator for the CipherSuites in this list.
+ */
+ Iterator<CipherSuite> iterator() {
+ return cipherSuites.iterator();
+ }
+
+ /**
+ * Return a reference to the internal Collection of CipherSuites.
+ * The Collection MUST NOT be modified.
+ */
+ Collection<CipherSuite> collection() {
+ return cipherSuites;
+ }
+
+ /**
+ * Return the number of CipherSuites in this list.
+ */
+ int size() {
+ return cipherSuites.size();
+ }
+
+ /**
+ * Return an array with the names of the CipherSuites in this list.
+ */
+ synchronized String[] toStringArray() {
+ if (suiteNames == null) {
+ suiteNames = new String[cipherSuites.size()];
+ int i = 0;
+ for (CipherSuite c : cipherSuites) {
+ suiteNames[i++] = c.name;
+ }
+ }
+ return suiteNames.clone();
+ }
+
+ public String toString() {
+ return cipherSuites.toString();
+ }
+
+ /**
+ * Write this list to an HandshakeOutStream in V3 ClientHello format.
+ */
+ void send(HandshakeOutStream s) throws IOException {
+ byte[] suiteBytes = new byte[cipherSuites.size() * 2];
+ int i = 0;
+ for (CipherSuite c : cipherSuites) {
+ suiteBytes[i] = (byte)(c.id >> 8);
+ suiteBytes[i+1] = (byte)c.id;
+ i += 2;
+ }
+ s.putBytes16(suiteBytes);
+ }
+
+ /**
+ * Clear cache of available ciphersuites. If we support all ciphers
+ * internally, there is no need to clear the cache and calling this
+ * method has no effect.
+ */
+ static synchronized void clearAvailableCache() {
+ if (CipherSuite.DYNAMIC_AVAILABILITY) {
+ supportedSuites = null;
+ defaultSuites = null;
+ CipherSuite.BulkCipher.clearAvailableCache();
+ JsseJce.clearEcAvailable();
+ }
+ }
+
+ /**
+ * Return the list of all available CipherSuites with a priority of
+ * minPriority or above.
+ * Should be called with the Class lock held.
+ */
+ private static CipherSuiteList buildAvailableCache(int minPriority) {
+ // SortedSet automatically arranges ciphersuites in default
+ // preference order
+ Set<CipherSuite> cipherSuites = new TreeSet<CipherSuite>();
+ Collection<CipherSuite> allowedCipherSuites = CipherSuite.allowedCipherSuites();
+ for (CipherSuite c : allowedCipherSuites) {
+ if ((c.allowed == false) || (c.priority < minPriority)) {
+ continue;
+ }
+ if (c.isAvailable()) {
+ cipherSuites.add(c);
+ }
+ }
+ return new CipherSuiteList(cipherSuites);
+ }
+
+ /**
+ * Return supported CipherSuites in preference order.
+ */
+ static synchronized CipherSuiteList getSupported() {
+ if (supportedSuites == null) {
+ supportedSuites =
+ buildAvailableCache(CipherSuite.SUPPORTED_SUITES_PRIORITY);
+ }
+ return supportedSuites;
+ }
+
+ /**
+ * Return default enabled CipherSuites in preference order.
+ */
+ static synchronized CipherSuiteList getDefault() {
+ if (defaultSuites == null) {
+ defaultSuites =
+ buildAvailableCache(CipherSuite.DEFAULT_SUITES_PRIORITY);
+ }
+ return defaultSuites;
+ }
+
+}