/*
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 * This code is free software; you can redistribute it and/or modify it
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 * 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).
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/*
 *
 *  (C) Copyright IBM Corp. 1999 All Rights Reserved.
 *  Copyright 1997 The Open Group Research Institute.  All rights reserved.
 */

package sun.security.krb5.internal;

import sun.security.util.*;
import sun.security.krb5.Asn1Exception;
import java.io.IOException;
import java.math.BigInteger;

Implements the ASN.1 EncKrbPrivPart type.

    METHOD-DATA ::=    SEQUENCE {
                       method-type[0]   INTEGER,
                       method-data[1]   OCTET STRING OPTIONAL
 }
/** * Implements the ASN.1 EncKrbPrivPart type. * * <pre>{@code * METHOD-DATA ::= SEQUENCE { * method-type[0] INTEGER, * method-data[1] OCTET STRING OPTIONAL * } * }</pre> */
public class MethodData { private int methodType; private byte[] methodData = null; //optional public MethodData(int type, byte[] data) { methodType = type; if (data != null) { methodData = data.clone(); } }
Constructs a MethodData object.
Params:
  • encoding – a Der-encoded data.
Throws:
  • Asn1Exception – if an error occurs while decoding an ASN1 encoded data.
  • IOException – if an I/O error occurs while reading encoded data.
/** * Constructs a MethodData 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 MethodData(DerValue encoding) throws Asn1Exception, IOException { DerValue der; if (encoding.getTag() != DerValue.tag_Sequence) { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } der = encoding.getData().getDerValue(); if ((der.getTag() & 0x1F) == 0x00) { BigInteger bint = der.getData().getBigInteger(); methodType = bint.intValue(); } else throw new Asn1Exception(Krb5.ASN1_BAD_ID); if (encoding.getData().available() > 0) { der = encoding.getData().getDerValue(); if ((der.getTag() & 0x1F) == 0x01) { methodData = der.getData().getOctetString(); } else throw new Asn1Exception(Krb5.ASN1_BAD_ID); } if (encoding.getData().available() > 0) throw new Asn1Exception(Krb5.ASN1_BAD_ID); }
Encodes an MethodData object.
Throws:
  • Asn1Exception – if an error occurs while decoding an ASN1 encoded data.
  • IOException – if an I/O error occurs while reading encoded data.
Returns:the byte array of encoded MethodData object.
/** * Encodes an MethodData object. * @return the byte array of encoded MethodData object. * @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 byte[] asn1Encode() throws Asn1Exception, IOException { DerOutputStream bytes = new DerOutputStream(); DerOutputStream temp = new DerOutputStream(); temp.putInteger(BigInteger.valueOf(methodType)); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp); if (methodData != null) { temp = new DerOutputStream(); temp.putOctetString(methodData); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp); } temp = new DerOutputStream(); temp.write(DerValue.tag_Sequence, bytes); return temp.toByteArray(); } }