112 lines
4.0 KiB
Java
112 lines
4.0 KiB
Java
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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*
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* (C) Copyright IBM Corp. 1999 All Rights Reserved.
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* Copyright 1997 The Open Group Research Institute. All rights reserved.
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*/
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package sun.security.krb5.internal;
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import sun.security.util.*;
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import sun.security.krb5.Asn1Exception;
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import java.io.IOException;
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import java.math.BigInteger;
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/**
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* Implements the ASN.1 EncKrbPrivPart type.
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*
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* <pre>{@code
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* METHOD-DATA ::= SEQUENCE {
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* method-type[0] INTEGER,
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* method-data[1] OCTET STRING OPTIONAL
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* }
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* }</pre>
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*/
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public class MethodData {
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private int methodType;
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private byte[] methodData = null; //optional
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public MethodData(int type, byte[] data) {
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methodType = type;
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if (data != null) {
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methodData = data.clone();
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}
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}
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/**
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* Constructs a MethodData object.
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* @param encoding a Der-encoded data.
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* @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
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* @exception IOException if an I/O error occurs while reading encoded data.
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*/
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public MethodData(DerValue encoding) throws Asn1Exception, IOException {
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DerValue der;
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if (encoding.getTag() != DerValue.tag_Sequence) {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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der = encoding.getData().getDerValue();
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if ((der.getTag() & 0x1F) == 0x00) {
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BigInteger bint = der.getData().getBigInteger();
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methodType = bint.intValue();
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}
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else
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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if (encoding.getData().available() > 0) {
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der = encoding.getData().getDerValue();
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if ((der.getTag() & 0x1F) == 0x01) {
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methodData = der.getData().getOctetString();
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}
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else throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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if (encoding.getData().available() > 0)
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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/**
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* Encodes an MethodData object.
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* @return the byte array of encoded MethodData object.
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* @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
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* @exception IOException if an I/O error occurs while reading encoded data.
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*/
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public byte[] asn1Encode() throws Asn1Exception, IOException {
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DerOutputStream bytes = new DerOutputStream();
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DerOutputStream temp = new DerOutputStream();
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temp.putInteger(BigInteger.valueOf(methodType));
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp);
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if (methodData != null) {
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temp = new DerOutputStream();
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temp.putOctetString(methodData);
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp);
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}
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temp = new DerOutputStream();
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temp.write(DerValue.tag_Sequence, bytes);
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return temp.toByteArray();
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}
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}
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