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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 TransitedEncoding type.

 TransitedEncoding      ::= SEQUENCE {
        tr-type         [0] Int32 -- must be registered --,
        contents        [1] OCTET STRING
 }

This definition reflects the Network Working Group RFC 4120 specification available at http://www.ietf.org/rfc/rfc4120.txt.

/** * Implements the ASN.1 TransitedEncoding type. * * <pre>{@code * TransitedEncoding ::= SEQUENCE { * tr-type [0] Int32 -- must be registered --, * contents [1] OCTET STRING * } * }</pre> * * <p> * This definition reflects the Network Working Group RFC 4120 * specification available at * <a href="http://www.ietf.org/rfc/rfc4120.txt"> * http://www.ietf.org/rfc/rfc4120.txt</a>. */
public class TransitedEncoding { public int trType; public byte[] contents; public TransitedEncoding(int type, byte[] cont) { trType = type; contents = cont; }
Constructs a TransitedEncoding 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 TransitedEncoding 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 TransitedEncoding(DerValue encoding) throws Asn1Exception, IOException { if (encoding.getTag() != DerValue.tag_Sequence) { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } DerValue der; der = encoding.getData().getDerValue(); if ((der.getTag() & 0x1F) == 0x00) { trType = der.getData().getBigInteger().intValue(); } else throw new Asn1Exception(Krb5.ASN1_BAD_ID); der = encoding.getData().getDerValue(); if ((der.getTag() & 0x1F) == 0x01) { contents = der.getData().getOctetString(); } else throw new Asn1Exception(Krb5.ASN1_BAD_ID); if (der.getData().available() > 0) throw new Asn1Exception(Krb5.ASN1_BAD_ID); }
Encodes a TransitedEncoding 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 the encoded TransitedEncoding object.
/** * Encodes a TransitedEncoding object. * @return the byte array of the encoded TransitedEncoding 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(trType)); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp); temp = new DerOutputStream(); temp.putOctetString(contents); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp); temp = new DerOutputStream(); temp.write(DerValue.tag_Sequence, bytes); return temp.toByteArray(); }
Parse (unmarshal) a TransitedEncoding object from a DER input stream. This form parsing might be used when expanding a value which is part of a constructed sequence and uses explicitly tagged type.
Params:
  • data – the Der input stream value, which contains one or more marshaled value.
  • explicitTag – tag number.
  • optional – indicate if this data field is optional
Throws:
  • Asn1Exception – on error.
Returns:an instance of TransitedEncoding.
/** * Parse (unmarshal) a TransitedEncoding object from a DER input stream. This form * parsing might be used when expanding a value which is part of * a constructed sequence and uses explicitly tagged type. * * @exception Asn1Exception on error. * @param data the Der input stream value, which contains one or more marshaled value. * @param explicitTag tag number. * @param optional indicate if this data field is optional * @return an instance of TransitedEncoding. * */
public static TransitedEncoding parse(DerInputStream data, byte explicitTag, boolean optional) throws Asn1Exception, IOException { if ((optional) && (((byte)data.peekByte() & (byte)0x1F) != explicitTag)) return null; DerValue der = data.getDerValue(); if (explicitTag != (der.getTag() & (byte)0x1F)) { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } else { DerValue subDer = der.getData().getDerValue(); return new TransitedEncoding(subDer); } } }