JDK8/Java8源码在线阅读

/*
 * Copyright (c) 1999, 2013, 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.
 */

/**
 * Contains class and interfaces for supporting SASL.
 *
 * This package defines classes and interfaces for SASL mechanisms.
 * It is used by developers to add authentication support for
 * connection-based protocols that use SASL.
 *
 * <h3>SASL Overview</h3>
 *
 * Simple Authentication and Security Layer (SASL) specifies a
 * challenge-response protocol in which data is exchanged between the
 * client and the server for the purposes of
 * authentication and (optional) establishment of a security layer on
 * which to carry on subsequent communications.  It is used with
 * connection-based protocols such as LDAPv3 or IMAPv4.  SASL is
 * described in
 * <A HREF="http://www.ietf.org/rfc/rfc2222.txt">RFC 2222</A>.
 *
 *
 * There are various <em>mechanisms</em> defined for SASL.
 * Each mechanism defines the data that must be exchanged between the
 * client and server in order for the authentication to succeed.
 * This data exchange required for a particular mechanism is referred to
 * to as its <em>protocol profile</em>.
 * The following are some examples of mechanisms that have been defined by
 * the Internet standards community.
 * <ul>
 * <li>DIGEST-MD5 (<A HREF="http://www.ietf.org/rfc/rfc2831.txt">RFC 2831</a>).
 * This mechanism defines how HTTP Digest Authentication can be used as a SASL
 * mechanism.
 * <li>Anonymous (<A HREF="http://www.ietf.org/rfc/rfc2245.txt">RFC 2245</a>).
 * This mechanism is anonymous authentication in which no credentials are
 * necessary.
 * <li>External (<A HREF="http://www.ietf.org/rfc/rfc2222.txt">RFC 2222</A>).
 * This mechanism obtains authentication information
 * from an external source (such as TLS or IPsec).
 * <li>S/Key (<A HREF="http://www.ietf.org/rfc/rfc2222.txt">RFC 2222</A>).
 * This mechanism uses the MD4 digest algorithm to exchange data based on
 * a shared secret.
 * <li>GSSAPI (<A HREF="http://www.ietf.org/rfc/rfc2222.txt">RFC 2222</A>).
 * This mechanism uses the
 * <A HREF="http://www.ietf.org/rfc/rfc2078.txt">GSSAPI</A>
 * for obtaining authentication information.
 * </ul>
 *
 * Some of these mechanisms provide both authentication and establishment
 * of a security layer, others only authentication.  Anonymous and
 * S/Key do not provide for any security layers.  GSSAPI and DIGEST-MD5
 * allow negotiation of the security layer.  For External, the
 * security layer is determined by the external protocol.
 *
 * <h3>Usage</h3>
 *
 * Users of this API are typically developers who produce
 * client library implementations for connection-based protocols,
 * such as LDAPv3 and IMAPv4,
 * and developers who write servers (such as LDAP servers and IMAP servers).
 * Developers who write client libraries use the
 * {@code SaslClient} and {@code SaslClientFactory} interfaces.
 * Developers who write servers use the
 * {@code SaslServer} and {@code SaslServerFactory} interfaces.
 *
 * Among these two groups of users, each can be further divided into two groups:
 * those who <em>produce</em> the SASL mechanisms and those

/**代码未完, 请加载全部代码(NowJava.com).**/