org.certificateservices.messages.pkimessages.PKIMessageGenerateUtils Maven / Gradle / Ivy
/************************************************************************
* *
* Certificate Service - Messages *
* *
* This software is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public License *
* License as published by the Free Software Foundation; either *
* version 3 of the License, or any later version. *
* *
* See terms of license at gnu.org. *
* *
*************************************************************************/
package org.certificateservices.messages.pkimessages;
import java.security.SecureRandom;
import java.util.Date;
import java.util.GregorianCalendar;
import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;
import org.certificateservices.messages.MessageException;
/**
* Class containing help utils when populating data in messages.
*
* @author Philip Vendil
*
*/
@SuppressWarnings({ "deprecation" })
public class PKIMessageGenerateUtils {
private static SecureRandom secureRandom = new SecureRandom();
private static String[] specialCharSet = {"8","9","a","b"};
/**
* Help method to generate a unique UUID according the the message header specification
*
* Pattern: [0-9a-fA-F]{8}-[0-9a-fA-F]{4}-4[0-9a-fA-F]{3}-[8-9a-bA-B][0-9a-fA-F]{3}-[0-9a-fA-F]{12}
* @return a newly generated UUID
*/
public static String generateRandomUUID(){
byte[] randomData = new byte[15];
secureRandom.nextBytes(randomData);
String hexData = new String(bytesToHex(randomData));
String specialChar = specialCharSet[secureRandom.nextInt(4)];
return hexData.substring(0, 8) + "-" + hexData.substring(8,12) + "-4" + hexData.substring(12,15) + "-" + specialChar + hexData.substring(15,18) + "-" + hexData.substring(18);
}
/**
* Method to convert a date to a XML gregorian calendar
* @param date the date to convert
* @return a XMLGregorianCalendar object or null if date is null.
* @throws MessageException if internal problems occurred converting the date.
*/
public static XMLGregorianCalendar dateToXMLGregorianCalendar(Date date) throws MessageException{
if(date == null){
return null;
}
GregorianCalendar c = new GregorianCalendar();
c.setTime(date);
try {
return DatatypeFactory.newInstance().newXMLGregorianCalendar(c);
} catch (DatatypeConfigurationException e) {
throw new MessageException("Error generating XMLGregorianDate from Date : " + e.getMessage(),e);
}
}
/**
* Method to convert a XML gregorian calendar to a date
* @param calendarDate the date to convert
* @return a Date object or null if calendarDate is null.
* @throws MessageException if internal problems occurred converting the date.
*/
public static Date xMLGregorianCalendarToDate(XMLGregorianCalendar calendarDate) throws MessageException{
if(calendarDate == null){
return null;
}
return calendarDate.toGregorianCalendar().getTime();
}
final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();
public static String bytesToHex(byte[] bytes) {
if(bytes == null){
return null;
}
char[] hexChars = new char[bytes.length * 2];
for ( int j = 0; j < bytes.length; j++ ) {
int v = bytes[j] & 0xFF;
hexChars[j * 2] = hexArray[v >>> 4];
hexChars[j * 2 + 1] = hexArray[v & 0x0F];
}
return new String(hexChars);
}
}