/* * Copyright (c) 2010, Oracle and/or its affiliates. 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.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package javax.net.ssl; /** * Extends the <code>SSLSession</code> interface to support additional * session attributes. * * @since 1.7 */public abstract class ExtendedSSLSession implements SSLSession {    /**     * Obtains an array of supported signature algorithms that the local side     * is willing to use.     * <p>     * Note: this method is used to indicate to the peer which signature     * algorithms may be used for digital signatures in TLS 1.2. It is     * not meaningful for TLS versions prior to 1.2.     * <p>     * The signature algorithm name must be a standard Java Security     * name (such as "SHA1withRSA", "SHA256withECDSA", and so on).     * See Appendix A in the <a href=     * "../../../technotes/guides/security/crypto/CryptoSpec.html#AppA">     * Java Cryptography Architecture API Specification &amp; Reference </a>     * for information about standard algorithm names.     * <p>     * Note: the local supported signature algorithms should conform to     * the algorithm constraints specified by     * {@link SSLParameters#getAlgorithmConstraints getAlgorithmConstraints()}     * method in <code>SSLParameters</code>.     *     * @return An array of supported signature algorithms, in descending     *     order of preference.  The return value is an empty array if     *     no signature algorithm is supported.     *     * @see SSLParameters#getAlgorithmConstraints     */    public abstract String[] getLocalSupportedSignatureAlgorithms();     /**     * Obtains an array of supported signature algorithms that the peer is     * able to use.     * <p>     * Note: this method is used to indicate to the local side which signature     * algorithms may be used for digital signatures in TLS 1.2. It is     * not meaningful for TLS versions prior to 1.2.     * <p>     * The signature algorithm name must be a standard Java Security     * name (such as "SHA1withRSA", "SHA256withECDSA", and so on).     * See Appendix A in the <a href=     * "../../../technotes/guides/security/crypto/CryptoSpec.html#AppA">     * Java Cryptography Architecture API Specification &amp; Reference </a>     * for information about standard algorithm names.     *     * @return An array of supported signature algorithms, in descending     *     order of preference.  The return value is an empty array if     *     the peer has not sent the supported signature algorithms.     *     * @see X509KeyManager     * @see X509ExtendedKeyManager     */    public abstract String[] getPeerSupportedSignatureAlgorithms();}