/*

 * Copyright (c) 2010, 2012, 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;

import java.util.List;

/**

 * 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 since 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=

     * "{@docRoot}/../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 since 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=

     * "{@docRoot}/../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();

    /**

     * Obtains a {@link List} containing all {@link SNIServerName}s

     * of the requested Server Name Indication (SNI) extension.

     * <P>

     * In server mode, unless the return {@link List} is empty,

     * the server should use the requested server names to guide its

     * selection of an appropriate authentication certificate, and/or

     * other aspects of security policy.

     * <P>

     * In client mode, unless the return {@link List} is empty,

     * the client should use the requested server names to guide its

     * endpoint identification of the peer's identity, and/or

     * other aspects of security policy.

     *

     * @return a non-null immutable list of {@link SNIServerName}s of the

     *         requested server name indications. The returned list may be

     *         empty if no server name indications were requested.

     * @throws UnsupportedOperationException if the underlying provider

     *         does not implement the operation

     *

     * @see SNIServerName

     * @see X509ExtendedTrustManager

     * @see X509ExtendedKeyManager

     *

     * @since 1.8

     */

    public List<SNIServerName> getRequestedServerNames() {

        throw new UnsupportedOperationException();

    }

}