org.cesecore.certificates.util.dn.PrintableStringEntryConverter.java Source code

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Here is the source code for org.cesecore.certificates.util.dn.PrintableStringEntryConverter.java

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/*************************************************************************
 *                                                                       *
 *  CESeCore: CE Security Core                                           *
 *                                                                       *
 *  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.cesecore.certificates.util.dn;

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.
 * 
 * Based on EJBCA version: PrintableStringEntryConverter.java 8373 2009-11-30 14:07:00Z jeklund
 * 
 * @version $Id$
 */
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);
    }
}