| /* |
| * 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * |
| * (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. |
| * |
| * <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. |
| * @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. |
| * @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. |
| * |
| * @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); |
| } |
| } |
| } |