/*************************************************************************
* *
* EJBCA: The OpenSource Certificate Authority *
* *
* This software is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public *
* License as published by the Free Software Foundation; either *
* version 2.1 of the License, or any later version. *
* *
* See terms of license at gnu.org. *
* *
*************************************************************************/
package org.ejbca.util.cert;
import java.io.IOException;
import org.bouncycastle.asn1.DERBMPString;
import org.bouncycastle.asn1.DERIA5String;
import org.bouncycastle.asn1.DERObject;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.DERPrintableString;
import org.bouncycastle.asn1.DERUTF8String;
import org.bouncycastle.asn1.x509.X509Name;
import org.bouncycastle.asn1.x509.X509NameEntryConverter;
/**
* A converter for X509 DN entries that uses PrintableString where possible.
* Default encoding is UTF-8, so this one is used when the default encoding is not desired.
* @version $Id: PrintableStringEntryConverter.java 8373 2009-11-30 14:07:00Z jeklund $
*/
public class PrintableStringEntryConverter
extends X509NameEntryConverter
{
/**
* return true if the passed in String can be represented without
* loss as a UTF8String, false otherwise.
*/
private boolean canBeUTF8(
String str)
{
for (int i = str.length() - 1; i >= 0; i--)
{
if (str.charAt(i) > 0x00ff)
{
return false;
}
}
return true;
}
/**
* Apply default coversion for the given value depending on the oid
* and the character range of the value.
*
* @param oid the object identifier for the DN entry
* @param value the value associated with it
* @return the ASN.1 equivalent for the string value.
*/
public DERObject getConvertedValue(
DERObjectIdentifier oid,
String value)
{
if (value.length() != 0 && value.charAt(0) == '#')
{
try
{
return convertHexEncoded(value, 1);
}
catch (IOException e)
{
throw new RuntimeException("can't recode value for oid " + oid.getId());
}
}
else if (oid.equals(X509Name.EmailAddress) || oid.equals(X509Name.DC))
{
return new DERIA5String(value);
}
else if (canBePrintable(value))
{
return new DERPrintableString(value);
}
else if (canBeUTF8(value))
{
return new DERUTF8String(value);
}
return new DERBMPString(value);
}
}