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* Copyright (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package sun.security.krb5.internal;
import java.io.IOException;
import static java.nio.charset.StandardCharsets.UTF_8;
import sun.security.krb5.Asn1Exception;
import sun.security.krb5.internal.util.KerberosString;
import sun.security.util.*;
/**
* Implements the ASN.1 ETYPE-INFO-ENTRY type.
*
* ETYPE-INFO-ENTRY ::= SEQUENCE {
* etype [0] Int32,
* salt [1] OCTET STRING OPTIONAL
* }
*
* @author Seema Malkani
*/
public class ETypeInfo {
private int etype;
private String salt = null;
private static final byte TAG_TYPE = 0;
private static final byte TAG_VALUE = 1;
private ETypeInfo() {
}
public ETypeInfo(int etype, String salt) {
this.etype = etype;
this.salt = salt;
}
public Object clone() {
return new ETypeInfo(etype, salt);
}
/**
* Constructs a ETypeInfo object.
* @param encoding a DER-encoded data.
* @exception Asn1Exception if an error occurs while decoding an
* ASN1 encoded data.
* @exception IOException if an I/O error occurs while reading encoded data.
*/
public ETypeInfo(DerValue encoding) throws Asn1Exception, IOException {
DerValue der = null;
if (encoding.getTag() != DerValue.tag_Sequence) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
// etype
der = encoding.getData().getDerValue();
if ((der.getTag() & 0x1F) == 0x00) {
this.etype = der.getData().getBigInteger().intValue();
}
else
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
// salt
if (encoding.getData().available() > 0) {
der = encoding.getData().getDerValue();
if ((der.getTag() & 0x1F) == 0x01) {
byte[] saltBytes = der.getData().getOctetString();
// Although salt is defined as an OCTET STRING, it's the
// encoding from of a string. As RFC 4120 says:
//
// "The salt, ..., is also completely unspecified with respect
// to character set and is probably locale-specific".
//
// It's known that this field is using the same encoding as
// KerberosString in most implementations.
if (KerberosString.MSNAME) {
this.salt = new String(saltBytes, UTF_8);
} else {
this.salt = new String(saltBytes);
}
}
}
if (encoding.getData().available() > 0)
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
/**
* Encodes this object to an OutputStream.
*
* @return byte array of the encoded data.
* @exception IOException if an I/O error occurs while reading encoded data.
* @exception Asn1Exception on encoding errors.
*/
public byte[] asn1Encode() throws Asn1Exception, IOException {
DerOutputStream bytes = new DerOutputStream();
DerOutputStream temp = new DerOutputStream();
temp.putInteger(etype);
bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true,
TAG_TYPE), temp);
if (salt != null) {
temp = new DerOutputStream();
if (KerberosString.MSNAME) {
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