/*
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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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* Portions Copyright 2007 Sun Microsystems, Inc.
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*/
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package org.opends.server.extensions;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Set;
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import org.opends.server.admin.server.ConfigurationChangeListener;
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import org.opends.server.admin.std.server.
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RepeatedCharactersPasswordValidatorCfg;
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import org.opends.server.api.PasswordValidator;
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import org.opends.server.core.Operation;
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import org.opends.server.types.ConfigChangeResult;
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import org.opends.server.types.ByteString;
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import org.opends.server.types.Entry;
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import org.opends.server.types.ResultCode;
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import static org.opends.server.messages.ExtensionsMessages.*;
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import static org.opends.server.messages.MessageHandler.*;
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/**
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* This class provides an OpenDS password validator that may be used to ensure
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* that proposed passwords are not allowed to have the same character appear
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* several times consecutively.
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*/
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public class RepeatedCharactersPasswordValidator
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extends PasswordValidator<RepeatedCharactersPasswordValidatorCfg>
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implements ConfigurationChangeListener<
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RepeatedCharactersPasswordValidatorCfg>
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{
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// The current configuration for this password validator.
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private RepeatedCharactersPasswordValidatorCfg currentConfig;
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/**
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* Creates a new instance of this repeated characters password validator.
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*/
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public RepeatedCharactersPasswordValidator()
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{
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super();
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// No implementation is required here. All initialization should be
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// performed in the initializePasswordValidator() method.
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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 void initializePasswordValidator(
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RepeatedCharactersPasswordValidatorCfg configuration)
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{
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configuration.addRepeatedCharactersChangeListener(this);
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currentConfig = configuration;
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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 void finalizePasswordValidator()
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{
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currentConfig.removeRepeatedCharactersChangeListener(this);
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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 boolean passwordIsAcceptable(ByteString newPassword,
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Set<ByteString> currentPasswords,
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Operation operation, Entry userEntry,
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StringBuilder invalidReason)
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{
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// Get a handle to the current configuration and see if we need to count
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// the number of repeated characters in the password.
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RepeatedCharactersPasswordValidatorCfg config = currentConfig;
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int maxRepeats = config.getMaximumConsecutiveLength();
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if (maxRepeats <= 0)
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{
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// We don't need to check anything, so the password will be acceptable.
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return true;
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}
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// Get the password as a string. If we should use case-insensitive
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// validation, then convert it to use all lowercase characters.
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String passwordString = newPassword.stringValue();
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if (! config.isCaseSensitiveValidation())
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{
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passwordString = passwordString.toLowerCase();
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}
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// Create variables to keep track of the last character we've seen and how
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// many times we have seen it.
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char lastCharacter = '\u0000';
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int consecutiveCount = 0;
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// Iterate through the characters in the password. If the consecutive
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// count ever gets too high, then fail.
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for (int i=0; i < passwordString.length(); i++)
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{
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char currentCharacter = passwordString.charAt(i);
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if (currentCharacter == lastCharacter)
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{
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consecutiveCount++;
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if (consecutiveCount > maxRepeats)
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{
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int msgID = MSGID_REPEATEDCHARS_VALIDATOR_TOO_MANY_CONSECUTIVE;
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String message = getMessage(msgID, maxRepeats);
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invalidReason.append(message);
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return false;
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}
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}
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else
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{
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lastCharacter = currentCharacter;
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consecutiveCount = 1;
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}
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}
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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public boolean isConfigurationChangeAcceptable(
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RepeatedCharactersPasswordValidatorCfg configuration,
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List<String> unacceptableReasons)
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{
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// All of the necessary validation should have been performed automatically,
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// so if we get to this point then the new configuration will be acceptable.
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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public ConfigChangeResult applyConfigurationChange(
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RepeatedCharactersPasswordValidatorCfg configuration)
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{
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ResultCode resultCode = ResultCode.SUCCESS;
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boolean adminActionRequired = false;
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ArrayList<String> messages = new ArrayList<String>();
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// For this password validator, we will always be able to successfully apply
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// the new configuration.
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currentConfig = configuration;
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return new ConfigChangeResult(resultCode, adminActionRequired, messages);
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}
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}
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