/*
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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 2006-2008 Sun Microsystems, Inc.
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* Portions Copyright 2012-2016 ForgeRock AS.
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*/
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package org.opends.server.schema;
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import static org.opends.messages.SchemaMessages.*;
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import static org.opends.server.util.StaticUtils.toLowerCase;
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import org.forgerock.i18n.LocalizableMessage;
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import org.forgerock.opendj.ldap.ByteSequence;
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import org.forgerock.opendj.ldap.ResultCode;
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import org.opends.server.types.DirectoryException;
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/**
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* This class defines an attribute syntax used for storing values that have been
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* encoded using a password storage scheme. The format for attribute values
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* with this syntax is the concatenation of the following elements in the given
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* order:
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* <BR>
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* <UL>
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* <LI>An opening curly brace ("{
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private static final LocalizedLogger logger = LocalizedLogger.getLoggerForThisClass();
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") character.</LI>
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* <LI>The name of the storage scheme used to encode the value.</LI>
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* <LI>A closing curly brace ("}") character.</LI>
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* <LI>The encoded value.</LI>
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* </UL>
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*/
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public class UserPasswordSyntax
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{
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/**
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* Decodes the provided user password value into its component parts.
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*
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* @param userPasswordValue The user password value to be decoded.
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*
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* @return A two-element string array whose elements are the storage scheme
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* name (in all lowercase characters) and the encoded value, in that
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* order.
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*
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* @throws DirectoryException If a problem is encountered while attempting
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* to decode the value.
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*/
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public static String[] decodeUserPassword(String userPasswordValue)
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throws DirectoryException
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{
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// Make sure that there actually is a value to decode.
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if (userPasswordValue == null || userPasswordValue.length() == 0)
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{
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LocalizableMessage message = ERR_ATTR_SYNTAX_USERPW_NO_VALUE.get();
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throw new DirectoryException(
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ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
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}
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// The first character of an encoded value must be an opening curly brace.
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if (userPasswordValue.charAt(0) != '{')
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{
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LocalizableMessage message = ERR_ATTR_SYNTAX_USERPW_NO_OPENING_BRACE.get();
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throw new DirectoryException(
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ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
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}
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// There must be a corresponding closing brace.
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int closePos = userPasswordValue.indexOf('}');
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if (closePos < 0)
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{
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LocalizableMessage message = ERR_ATTR_SYNTAX_USERPW_NO_CLOSING_BRACE.get();
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throw new DirectoryException(
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ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
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}
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// Get the storage scheme name and encoded value.
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String schemeName = userPasswordValue.substring(1, closePos);
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String encodedValue = userPasswordValue.substring(closePos+1);
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if (schemeName.length() == 0)
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{
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LocalizableMessage message = ERR_ATTR_SYNTAX_USERPW_NO_SCHEME.get();
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throw new DirectoryException(
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ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
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}
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return new String[] { toLowerCase(schemeName), encodedValue };
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}
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/**
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* Indicates whether the provided value is encoded using the user password
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* syntax.
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*
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* @param value The value for which to make the determination.
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*
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* @return <CODE>true</CODE> if the value appears to be encoded using the
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* user password syntax, or <CODE>false</CODE> if not.
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*/
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public static boolean isEncoded(ByteSequence value)
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{
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// If the value is null or empty, then it's not.
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if (value == null || value.length() == 0)
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{
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return false;
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}
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// If the value doesn't start with an opening curly brace, then it's not.
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if (value.byteAt(0) != '{')
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{
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return false;
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}
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// There must be a corresponding closing curly brace, and there must be at
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// least one character inside the brace.
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int closingBracePos = -1;
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for (int i=1; i < value.length(); i++)
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{
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if (value.byteAt(i) == '}')
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{
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closingBracePos = i;
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break;
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}
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}
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return closingBracePos >= 0
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&& closingBracePos != 1
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// The closing curly brace must not be the last character of the password.
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&& closingBracePos != value.length() - 1;
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}
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}
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