Java example source code file (package-info.java)

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The package-info.java Java example source code

/*
 * 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
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 */

/**
 * 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
 *
 * 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.
 *
 *
 * There are various <em>mechanisms 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.
 * The following are some examples of mechanisms that have been defined by
 * the Internet standards community.
 * <ul>
 * <li>DIGEST-MD5 (RFC 2831).
 * This mechanism defines how HTTP Digest Authentication can be used as a SASL
 * mechanism.
 * <li>Anonymous (RFC 2245).
 * This mechanism is anonymous authentication in which no credentials are
 * necessary.
 * <li>External (RFC 2222).
 * This mechanism obtains authentication information
 * from an external source (such as TLS or IPsec).
 * <li>S/Key (RFC 2222).
 * This mechanism uses the MD4 digest algorithm to exchange data based on
 * a shared secret.
 * <li>GSSAPI (RFC 2222).
 * This mechanism uses the
 * <A HREF="http://www.ietf.org/rfc/rfc2078.txt">GSSAPI
 * 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
 *
 * 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 the SASL mechanisms and those
 * who <em>use the SASL mechanisms.
 * The producers of SASL mechanisms need to provide implementations
 * for these interfaces, while users of the SASL mechanisms use
 * the APIs in this package to access those implementations.
 *
 * <h2>Related Documentation
 *
 * Please refer to the
 * <a href="../../../../technotes/guides/security/sasl/sasl-refguide.html">Java
 * SASL Programming Guide</a> for information on how to use this API.
 *
 * @since 1.5
 */
package javax.security.sasl;