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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package netscape.security.x509;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.CharsetEncoder;
import netscape.security.util.ASN1CharStrConvMap;
import netscape.security.util.DerValue;
/**
* A AVAValueConverter that converts a Printable String attribute to a DerValue
* and vice versa. An example an attribute that is a printable string is "C".
*
* @see ASN1CharStrConvMap
* @see AVAValueConverter
*
* @author Lily Hsiao, Slava Galperin at Netscape Communications, Inc.
*/
public class PrintableConverter implements AVAValueConverter {
// public constructors.
public PrintableConverter() {
}
/**
* Converts a string with ASN.1 Printable characters to a DerValue.
*
* @param valueString a string with Printable characters.
*
* @return a DerValue.
*
* @exception IOException if a Printable encoder is not
* available for the conversion.
*/
public DerValue getValue(String valueString)
throws IOException {
return getValue(valueString, null);
}
public DerValue getValue(String valueString, byte[] tags) throws IOException {
try {
CharsetEncoder encoder = ASN1CharStrConvMap.getDefault().getEncoder(DerValue.tag_PrintableString);
if (encoder == null)
throw new IOException("No encoder for printable");
CharBuffer charBuffer = CharBuffer.wrap(valueString.toCharArray());
ByteBuffer byteBuffer = encoder.encode(charBuffer);
return new DerValue(DerValue.tag_PrintableString,
byteBuffer.array(), byteBuffer.arrayOffset(), byteBuffer.limit());
} catch (CharacterCodingException e) {
throw new IllegalArgumentException("Invalid Printable String AVA Value", e);
}
}
/**
* Converts a BER encoded value of PrintableString to a DER encoded value.
* Checks if the BER encoded value is a PrintableString.
* NOTE only DER encoded values are currently accepted on input.
*
* @param berStream A byte array of the BER encoded value.
*
* @return A DerValue.
*
* @exception IOException if the BER value cannot be converted to a
* PrintableString DER value.
*/
public DerValue getValue(byte[] berStream)
throws IOException {
DerValue value = new DerValue(berStream);
if (value.tag != DerValue.tag_PrintableString)
throw new IOException("Invalid Printable String AVA Value");
return value;
}
/**
* Converts a DerValue of PrintableString to a java string with
* PrintableString characters.
*
* @param avaValue a DerValue.
*
* @return a string with PrintableString characters.
*
* @exception IOException if the DerValue is not a PrintableString i.e.
* The DerValue cannot be converted to a string
* with PrintableString characters.
*/
public String getAsString(DerValue avaValue)
throws IOException {
return avaValue.getPrintableString();
}
}
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