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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 netscape.security.util.DerValue;
/**
* Interface for classes that convert a attribute value string to a DER encoded
* ASN.1 value and vice versa. The converters are associated with attribute
* types, such as directory string, ia5string, etc.
*
* <P>
* For example, to convert a string, such as an organization name for the "O"
* attribute to a DerValue, the "O" attribute is mapped to the DirStrConverter
* which is used to convert the organization name to a DER encoded Directory
* String which is a DerValue of a ASN.1 PrintableString, T.61String or
* UniversalString for the organization name.
*
* @author Lily Hsiao, Slava Galperin at Netscape Communications, Inc.
*/
public interface AVAValueConverter {
/**
* Converts a string to a DER encoded attribute value.
*
* @param valueString An AVA value string not encoded in any form.
*
* @return A DerValue object.
*
* @exception IOException if an error occurs during the conversion.
*/
public DerValue getValue(String valueString) throws IOException;
/**
* Converts a string to a DER encoded attribute value. Specify the order of
* DER tags to use if more than one encoding is possible. Currently
* Directory Strings can have different order for backwards compatibility.
* By 2003 all should be UTF8String.
*
* @param valueString An AVA value string not encoded in any form.
*
* @return A DerValue object.
*
* @exception IOException if an error occurs during the conversion.
*/
public DerValue getValue(String valueString, byte[] tags)
throws IOException;
/**
* Converts a BER encoded value to a DER encoded attribute value.
*
* @param berStream A byte array of the BER encoded AVA value.
* @return A DerValue object.
*/
public DerValue getValue(byte[] berStream) throws IOException;
/**
* Converts a DER encoded value to a string, not encoded in any form.
*
* @param avaValue A DerValue object.
*
* @return A string for the value or null if it can't be converted.
*
* @exception IOException if an error occurs during the conversion.
*/
public String getAsString(DerValue avaValue) throws IOException;
}
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