| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.server.kerberos.shared.messages.value; |
| |
| |
| import java.text.ParseException; |
| import java.text.SimpleDateFormat; |
| import java.util.Calendar; |
| import java.util.Date; |
| import java.util.GregorianCalendar; |
| import java.util.TimeZone; |
| |
| import org.apache.directory.shared.ldap.util.StringTools; |
| |
| |
| /** |
| * Implementation of the time object for Kerberos. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @version $Rev$, $Date$ |
| */ |
| public class KerberosTime implements Comparable<KerberosTime> |
| { |
| /** The number of milliseconds in a minute. */ |
| public static final int MINUTE = 60000; |
| |
| /** The number of milliseconds in a day. */ |
| public static final int DAY = MINUTE * 1440; |
| |
| /** The number of milliseconds in a week. */ |
| public static final int WEEK = MINUTE * 10080; |
| |
| /** Constant for the {@link KerberosTime} "infinity." */ |
| public static final KerberosTime INFINITY = new KerberosTime( Long.MAX_VALUE ); |
| |
| private static final TimeZone UTC_TIME_ZONE = TimeZone.getTimeZone( "UTC" ); |
| private static final SimpleDateFormat dateFormat = new SimpleDateFormat( "yyyyMMddHHmmss'Z'" ); |
| private static final Calendar CALENDAR = new GregorianCalendar( UTC_TIME_ZONE ); |
| |
| static |
| { |
| dateFormat.setTimeZone( UTC_TIME_ZONE ); |
| } |
| |
| private long kerberosTime; |
| |
| |
| /** |
| * Creates a new instance of KerberosTime. |
| */ |
| public KerberosTime() |
| { |
| kerberosTime = System.currentTimeMillis(); |
| } |
| |
| |
| /** |
| * Creates a new instance of KerberosTime. |
| * |
| * @param time |
| */ |
| public KerberosTime( long time ) |
| { |
| kerberosTime = time; |
| } |
| |
| |
| /** |
| * Creates a new instance of KerberosTime. |
| * |
| * @param time |
| */ |
| public KerberosTime( Date time ) |
| { |
| kerberosTime = time.getTime(); |
| } |
| |
| |
| /** |
| * Returns the {@link KerberosTime} for a given zulu time. |
| * |
| * @param zuluTime |
| * @return The {@link KerberosTime}. |
| * @throws ParseException |
| */ |
| /*public static KerberosTime getTime( String zuluTime ) throws ParseException |
| { |
| Date date = null; |
| synchronized ( dateFormat ) |
| { |
| date = dateFormat.parse( zuluTime ); |
| } |
| return new KerberosTime( date ); |
| }*/ |
| |
| private static int[] DAYS_PER_MONTH = new int[]{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; |
| private static int FEBRUARY = 2; |
| |
| /** |
| * Parse a KerberosTime |
| * @param zuluTime The time to parse |
| * @return A valid KzerberosTime, containing the Date |
| * @exception ParseException If the time is not a KerberosTime |
| */ |
| public static KerberosTime getTime( String zuluTime ) throws ParseException |
| { |
| Date date = null; |
| |
| if ( ( zuluTime == null ) || ( zuluTime.length() != 15 ) ) |
| { |
| throw new ParseException( "Invalid KerberosTime : it should not be null", 0 ); |
| } |
| |
| char[] zTime = zuluTime.toCharArray(); |
| |
| for ( int i = 0; i < zTime.length; i++ ) |
| { |
| if ( !StringTools.isDigit( zTime[i] ) ) |
| { |
| if ( ( i == 14 ) && ( ( zTime[i] == 'Z' ) || ( zTime[i] == 'z' ) ) ) |
| { |
| break; |
| } |
| else |
| { |
| throw new ParseException( "Invalid KerberosTime", i ); |
| } |
| } |
| } |
| |
| // compute the numbers |
| int year = ( ( zTime[0] - '0' ) * 1000 ) + |
| ( ( zTime[1] - '0' ) * 100 ) + |
| ( ( zTime[2] - '0' ) * 10 ) + |
| ( zTime[3] - '0' ); |
| |
| int month = ( ( zTime[4] - '0' ) * 10 ) + |
| ( zTime[5] - '0' ); |
| |
| int day = ( ( zTime[6] - '0' ) * 10 ) + |
| ( zTime[7] - '0' ); |
| |
| int hour = ( ( zTime[8] - '0' ) * 10 ) + |
| ( zTime[9] - '0' ); |
| |
| int min = ( ( zTime[10] - '0' ) * 10 ) + |
| ( zTime[11] - '0' ); |
| |
| int sec = ( ( zTime[12] - '0' ) * 10 ) + |
| ( zTime[13] - '0' ); |
| |
| // Now test the values |
| if ( ( month == 0 ) || ( month > 12 ) ) |
| { |
| throw new ParseException( "Invalid KerberosTime : month is invalid", 5 ); |
| } |
| |
| if ( day == 0 ) |
| { |
| throw new ParseException( "Invalid KerberosTime : day is invalid", 7 ); |
| } |
| |
| if ( month == FEBRUARY ) |
| { |
| // Check for leap years |
| if ( ( year & 0x0003 ) == 0 ) |
| { |
| // evey 400 years, we have a leap year, otherwise it's not |
| if ( year % 400 == 0 ) |
| { |
| if ( day > 29 ) |
| { |
| throw new ParseException( "Invalid KerberosTime : day is invalid", 7 ); |
| } |
| } |
| else |
| { |
| if ( day > 28 ) |
| { |
| throw new ParseException( "Invalid KerberosTime : day is invalid for february", 7 ); |
| } |
| } |
| } |
| else |
| { |
| if ( day > 28 ) |
| { |
| // We don't have a leap year, so we should have only 28 days |
| throw new ParseException( "Invalid KerberosTime : day is invalid for a non leap year", 7 ); |
| } |
| } |
| } |
| else |
| { |
| if ( day > DAYS_PER_MONTH[month] ) |
| { |
| throw new ParseException( "Invalid KerberosTime : day is invalid for this month", 7 ); |
| } |
| } |
| |
| if ( ( hour > 23 ) || ( min > 59 ) || ( sec > 59 ) ) |
| { |
| throw new ParseException( "Invalid KerberosTime : time is invalid", 9 ); |
| } |
| |
| synchronized( CALENDAR ) |
| { |
| CALENDAR.clear(); |
| CALENDAR.set( year, month - 1, day, hour, min, sec ); |
| date = CALENDAR.getTime(); |
| } |
| |
| return new KerberosTime( date ); |
| } |
| |
| |
| public int compareTo( KerberosTime that ) |
| { |
| final int BEFORE = -1; |
| final int EQUAL = 0; |
| final int AFTER = 1; |
| |
| // this optimization is usually worthwhile, and can always be added |
| if ( this == that ) |
| { |
| return EQUAL; |
| } |
| |
| // primitive numbers follow this form |
| if ( this.kerberosTime < that.kerberosTime ) |
| { |
| return BEFORE; |
| } |
| |
| if ( this.kerberosTime > that.kerberosTime ) |
| { |
| return AFTER; |
| } |
| |
| return EQUAL; |
| } |
| |
| |
| /** |
| * Returns the {@link KerberosTime} as a long. |
| * |
| * @return The {@link KerberosTime} as a long. |
| */ |
| public long getTime() |
| { |
| return kerberosTime; |
| } |
| |
| |
| /** |
| * Returns the {@link KerberosTime} as a {@link Date}. |
| * |
| * @return The {@link KerberosTime} as a {@link Date}. |
| */ |
| public Date toDate() |
| { |
| return new Date( kerberosTime ); |
| } |
| |
| |
| /** |
| * Returns whether this {@link KerberosTime} is within the given clockskew. |
| * |
| * @param clockSkew |
| * @return true if this {@link KerberosTime} is within the given clockskew. |
| */ |
| public boolean isInClockSkew( long clockSkew ) |
| { |
| return Math.abs( kerberosTime - System.currentTimeMillis() ) < clockSkew; |
| } |
| |
| |
| /** |
| * Returns whether this {@link KerberosTime} is greater than a given {@link KerberosTime}. |
| * |
| * @param time |
| * @return true if this {@link KerberosTime} is greater than a given {@link KerberosTime}. |
| */ |
| public boolean greaterThan( KerberosTime time ) |
| { |
| return kerberosTime > time.kerberosTime; |
| } |
| |
| |
| /** |
| * Returns whether this {@link KerberosTime} is less than a given {@link KerberosTime}. |
| * |
| * @param time |
| * @return true if this {@link KerberosTime} is less than a given {@link KerberosTime}. |
| */ |
| public boolean lessThan( KerberosTime time ) |
| { |
| return kerberosTime < time.kerberosTime; |
| } |
| |
| |
| /** |
| * Returns whether this {@link KerberosTime} is equal to another {@link KerberosTime}. |
| * |
| * @param time |
| * @return true if the two {@link KerberosTime}s are equal. |
| */ |
| public boolean equals( KerberosTime time ) |
| { |
| return kerberosTime == time.kerberosTime; |
| } |
| |
| |
| /** |
| * Returns whether this {@link KerberosTime} is zero. |
| * |
| * @return true if this {@link KerberosTime} is zero. |
| */ |
| public boolean isZero() |
| { |
| return kerberosTime == 0; |
| } |
| |
| |
| public String toString() |
| { |
| Date kerberosDate = new Date( kerberosTime ); |
| |
| synchronized ( dateFormat ) |
| { |
| return dateFormat.format( kerberosDate ); |
| } |
| } |
| } |