/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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*/
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package org.opends.server.schema;
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import static org.opends.server.loggers.debug.DebugLogger.*;
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import static org.opends.server.schema.SchemaConstants.*;
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import java.util.Collection;
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import java.util.Collections;
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import org.opends.server.api.EqualityMatchingRule;
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import org.opends.server.api.PasswordStorageScheme;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.loggers.debug.DebugTracer;
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import org.opends.server.types.ByteSequence;
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import org.opends.server.types.ByteString;
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import org.opends.server.types.ConditionResult;
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import org.opends.server.types.DebugLogLevel;
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import org.opends.server.types.DirectoryException;
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/**
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* This class implements the userPasswordMatch matching rule, which can be used
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* to determine whether a clear-text value matches an encoded password.
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*/
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class UserPasswordEqualityMatchingRule
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extends EqualityMatchingRule
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{
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/**
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* The tracer object for the debug logger.
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*/
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private static final DebugTracer TRACER = getTracer();
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/**
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* Creates a new instance of this userPasswordMatch matching rule.
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*/
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public UserPasswordEqualityMatchingRule()
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{
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super();
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public Collection<String> getAllNames()
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{
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return Collections.singleton(getName());
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}
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/**
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* Retrieves the common name for this matching rule.
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*
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* @return The common name for this matching rule, or <CODE>null</CODE> if
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* it does not have a name.
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*/
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@Override
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public String getName()
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{
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return EMR_USER_PASSWORD_NAME;
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}
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/**
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* Retrieves the OID for this matching rule.
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*
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* @return The OID for this matching rule.
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*/
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@Override
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public String getOID()
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{
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return EMR_USER_PASSWORD_OID;
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}
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/**
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* Retrieves the description for this matching rule.
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*
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* @return The description for this matching rule, or <CODE>null</CODE> if
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* there is none.
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*/
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@Override
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public String getDescription()
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{
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// There is no standard description for this matching rule.
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return EMR_USER_PASSWORD_DESCRIPTION;
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}
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/**
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* Retrieves the OID of the syntax with which this matching rule is
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* associated.
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*
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* @return The OID of the syntax with which this matching rule is associated.
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*/
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@Override
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public String getSyntaxOID()
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{
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return SYNTAX_USER_PASSWORD_OID;
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}
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/**
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* Retrieves the normalized form of the provided value, which is best suited
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* for efficiently performing matching operations on that value.
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*
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* @param value The value to be normalized.
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*
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* @return The normalized version of the provided value.
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*
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* @throws DirectoryException If the provided value is invalid according to
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* the associated attribute syntax.
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*/
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@Override
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public ByteString normalizeValue(ByteSequence value)
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throws DirectoryException
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{
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// We will not alter the value in any way
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return value.toByteString();
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}
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/**
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* Indicates whether the provided attribute value should be considered a match
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* for the given assertion value. This will only be used for the purpose of
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* extensible matching. Other forms of matching against equality matching
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* rules should use the <CODE>areEqual</CODE> method.
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*
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* @param attributeValue The attribute value in a form that has been
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* normalized according to this matching rule.
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* @param assertionValue The assertion value in a form that has been
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* normalized according to this matching rule.
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*
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* @return <CODE>true</CODE> if the attribute value should be considered a
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* match for the provided assertion value, or <CODE>false</CODE> if
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* not.
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*/
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@Override
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public ConditionResult valuesMatch(ByteSequence attributeValue,
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ByteSequence assertionValue)
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{
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// We must be able to decode the attribute value using the user password
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// syntax.
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String[] userPWComponents;
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try
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{
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userPWComponents =
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UserPasswordSyntax.decodeUserPassword(attributeValue.toString());
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}
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catch (Exception e)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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return ConditionResult.FALSE;
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}
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// The first element of the array will be the scheme. Make sure that we
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// support the requested scheme.
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PasswordStorageScheme storageScheme =
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DirectoryServer.getPasswordStorageScheme(userPWComponents[0]);
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if (storageScheme == null)
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{
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// It's not a scheme that we can support.
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return ConditionResult.FALSE;
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}
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// We support the scheme, so make the determination.
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if (storageScheme.passwordMatches(assertionValue,
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ByteString.valueOf(userPWComponents[1])))
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{
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return ConditionResult.TRUE;
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}
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else
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{
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return ConditionResult.FALSE;
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}
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}
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/**
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* Generates a hash code for the provided attribute value. This version of
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* the method will simply create a hash code from the normalized form of the
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* attribute value. For matching rules explicitly designed to work in cases
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* where byte-for-byte comparisons of normalized values is not sufficient for
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* determining equality (e.g., if the associated attribute syntax is based on
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* hashed or encrypted values), then this method must be overridden to provide
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* an appropriate implementation for that case.
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*
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* @param attributeValue The attribute value for which to generate the hash
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* code.
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*
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* @return The hash code generated for the provided attribute value.
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*/
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@Override
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public int generateHashCode(ByteSequence attributeValue)
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{
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// Because of the variable encoding that may be used, we have no way of
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// comparing two user password values by hash code and therefore we'll
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// always return the same value so that the valuesMatch method will be
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// invoked to make the determination.
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return 1;
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}
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}
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