/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions Copyright [year] [name of copyright owner]".
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*
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* Copyright 2006-2009 Sun Microsystems, Inc.
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* Portions Copyright 2014 ForgeRock AS.
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*/
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package org.opends.server.api;
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import org.forgerock.i18n.LocalizableMessage;
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import java.util.List;
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import org.opends.server.admin.std.server.PasswordStorageSchemeCfg;
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import org.forgerock.opendj.config.server.ConfigException;
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import org.opends.server.types.*;
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import org.forgerock.opendj.ldap.ByteString;
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import org.forgerock.opendj.ldap.ByteSequence;
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/**
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* This class defines the set of methods and structures that must be
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* implemented by a Directory Server module that implements a password
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* storage scheme. Each subclass may only implement a single password
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* storage scheme type.
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*
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* @param <T> The type of configuration handled by this
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* password storage scheme
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*/
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@org.opends.server.types.PublicAPI(
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stability=org.opends.server.types.StabilityLevel.UNCOMMITTED,
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mayInstantiate=false,
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mayExtend=true,
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mayInvoke=false)
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public abstract class
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PasswordStorageScheme <T extends PasswordStorageSchemeCfg>
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{
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/**
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* Initializes this password storage scheme handler based on the
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* information in the provided configuration entry. It should also
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* register itself with the Directory Server for the particular
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* storage scheme that it will manage.
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*
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* @param configuration The configuration entry that contains the
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* information to use to initialize this
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* password storage scheme handler.
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*
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* @throws ConfigException If an unrecoverable problem arises in
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* the process of performing the
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* initialization.
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*
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* @throws InitializationException If a problem occurs during
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* initialization that is not
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* related to the server
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* configuration.
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*/
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public abstract void initializePasswordStorageScheme(
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T configuration)
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throws ConfigException, InitializationException;
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/**
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* Indicates whether the provided configuration is acceptable for
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* this password storage scheme. It should be possible to call this
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* method on an uninitialized password storage scheme instance in
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* order to determine whether the password storage scheme would be
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* able to use the provided configuration.
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* <BR><BR>
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* Note that implementations which use a subclass of the provided
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* configuration class will likely need to cast the configuration
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* to the appropriate subclass type.
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*
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* @param configuration The password storage scheme
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* configuration for which to make the
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* determination.
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* @param unacceptableReasons A list that may be used to hold the
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* reasons that the provided
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* configuration is not acceptable.
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*
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* @return {@code true} if the provided configuration is acceptable
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* for this password storage scheme, or {@code false} if
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* not.
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*/
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public boolean isConfigurationAcceptable(
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PasswordStorageSchemeCfg configuration,
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List<LocalizableMessage> unacceptableReasons)
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{
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// This default implementation does not perform any special
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// validation. It should be overridden by password storage scheme
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// implementations that wish to perform more detailed validation.
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return true;
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}
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/**
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* Performs any necessary finalization that might be required when
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* this password storage scheme is no longer needed (e.g., the
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* scheme is disabled or the server is shutting down).
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*/
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public void finalizePasswordStorageScheme()
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{
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// No implementation required by default.
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}
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/**
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* Retrieves the name of the password storage scheme provided by
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* this handler.
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*
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* @return The name of the password storage scheme provided by this
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* handler.
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*/
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public abstract String getStorageSchemeName();
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/**
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* Encodes the provided plaintext password for this storage scheme,
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* without the name of the associated scheme. Note that the
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* provided plaintext password should not be altered in any way.
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*
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* @param plaintext The plaintext version of the password.
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*
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* @return The password that has been encoded using this storage
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* scheme.
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*
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* @throws DirectoryException If a problem occurs while
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* processing.
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*/
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public abstract ByteString encodePassword(ByteSequence plaintext)
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throws DirectoryException;
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/**
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* Encodes the provided plaintext password for this storage scheme,
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* prepending the name of the scheme in curly braces. Note that the
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* provided plaintext password should not be altered in any way.
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*
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* @param plaintext The plaintext version of the password.
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*
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* @return The encoded password, including the name of the storage
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* scheme.
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*
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* @throws DirectoryException If a problem occurs while
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* processing.
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*/
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public abstract ByteString encodePasswordWithScheme(
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ByteSequence plaintext)
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throws DirectoryException;
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/**
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* Indicates whether the provided plaintext password included in a
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* bind request matches the given stored value. The provided stored
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* value should not include the scheme name in curly braces.
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*
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* @param plaintextPassword The plaintext password provided by the
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* user as part of a simple bind attempt.
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* @param storedPassword The stored password to compare against
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* the provided plaintext password.
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*
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* @return {@code true} if the provided plaintext password matches
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* the provided stored password, or {@code false} if not.
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*/
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public abstract boolean passwordMatches(
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ByteSequence plaintextPassword,
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ByteSequence storedPassword);
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/**
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* Indicates whether this password storage scheme supports the
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* ability to interact with values using the authentication password
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* syntax defined in RFC 3112.
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*
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* @return {@code true} if this password storage scheme supports
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* the ability to interact with values using the
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* authentication password syntax, or {@code false} if it
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* does not.
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*/
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public abstract boolean supportsAuthPasswordSyntax();
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/**
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* Retrieves the scheme name that should be used with this password
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* storage scheme when it is used in the context of the
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* authentication password syntax. This default implementation will
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* return the same value as the {@code getStorageSchemeName} method.
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*
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* @return The scheme name that should be used with this password
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* storage scheme when it is used in the context of the
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* authentication password syntax.
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*/
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public String getAuthPasswordSchemeName()
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{
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return getStorageSchemeName();
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}
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/**
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* Encodes the provided plaintext password for this storage scheme
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* using the authentication password syntax defined in RFC 3112.
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* Note that the provided plaintext password should not be altered
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* in any way.
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*
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* @param plaintext The plaintext version of the password.
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*
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* @return The password that has been encoded in the authentication
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* password syntax.
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*
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* @throws DirectoryException If a problem occurs while processing
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* of if this storage scheme does not
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* support the authentication password
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* syntax.
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*/
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public abstract ByteString encodeAuthPassword(
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ByteSequence plaintext) throws DirectoryException;
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/**
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* Indicates whether the provided plaintext password matches the
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* encoded password using the authentication password syntax with
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* the given authInfo and authValue components.
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*
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* @param plaintextPassword The plaintext password provided by the
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* user.
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* @param authInfo The authInfo component of the password
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* encoded in the authentication password
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* syntax.
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* @param authValue The authValue component of the
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* password encoded in the authentication
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* password syntax.
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*
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* @return {@code true} if the provided plaintext password matches
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* the encoded password according to the authentication
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* password info syntax, or {@code false} if it does not or
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* this storage scheme does not support the authentication
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* password syntax.
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*/
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public abstract boolean authPasswordMatches(
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ByteSequence plaintextPassword,
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String authInfo, String authValue);
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/**
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* Indicates whether this storage scheme is reversible (i.e., it is
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* possible to obtain the original plaintext value from the stored
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* password).
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*
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* @return {@code true} if this is a reversible password storage
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* scheme, or {@code false} if it is not.
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*/
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public abstract boolean isReversible();
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/**
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* Retrieves the original plaintext value for the provided stored
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* password. Note that this should only be called if
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* {@code isReversible} returns {@code true}.
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*
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* @param storedPassword The password for which to obtain the
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* plaintext value. It should not include
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* the scheme name in curly braces.
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*
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* @return The plaintext value for the provided stored password.
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*
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* @throws DirectoryException If it is not possible to obtain the
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* plaintext value for the provided
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* stored password.
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*/
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public abstract ByteString getPlaintextValue(
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ByteSequence storedPassword)
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throws DirectoryException;
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/**
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* Retrieves the original plaintext value for the provided password
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* stored in the authPassword syntax. Note that this should only be
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* called if {@code isReversible} returns {@code true}.
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*
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* @param authInfo The authInfo component of the password encoded
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* in the authentication password syntax.
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* @param authValue The authValue component of the password
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* encoded in the authentication password syntax.
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*
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* @return The plaintext value for the provided stored password.
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*
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* @throws DirectoryException If it is not possible to obtain the
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* plaintext value for the provided
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* stored password, or if this storage
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* scheme does not support the
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* authPassword syntax..
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*/
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public abstract ByteString getAuthPasswordPlaintextValue(
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String authInfo, String authValue)
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throws DirectoryException;
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/**
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* Indicates whether this password storage scheme should be
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* considered "secure". If the encoding used for this scheme does
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* not obscure the value at all, or if it uses a method that is
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* trivial to reverse (e.g., base64), then it should not be
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* considered secure.
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* <BR><BR>
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* This may be used to determine whether a password may be included
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* in a set of search results, including the possibility of
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* overriding access controls in the case that access controls would
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* allow the password to be returned but the password is considered
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* too insecure to reveal.
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*
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* @return {@code false} if it may be trivial to discover the
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* original plain-text password from the encoded form, or
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* {@code true} if the scheme offers sufficient protection
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* that revealing the encoded password will not easily
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* reveal the corresponding plain-text value.
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*/
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public abstract boolean isStorageSchemeSecure();
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}
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