/*
* Copyright (c) 2000, 2006, 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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/*
* (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.krb5.Config;
import sun.security.krb5.Asn1Exception;
import sun.security.util.*;
import java.net.InetAddress;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.UnknownHostException;
import java.io.IOException;
/**
* Implements the ASN.1 HostAddress type.
*
* <xmp>
* HostAddress ::= SEQUENCE {
* addr-type [0] Int32,
* address [1] OCTET STRING
* }
* </xmp>
*
* <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 HostAddress implements Cloneable {
int addrType;
byte[] address = null;
private static InetAddress localInetAddress; //caches local inet address
private static final boolean DEBUG = sun.security.krb5.internal.Krb5.DEBUG;
private volatile int hashCode = 0;
private HostAddress(int dummy) {}
public Object clone() {
HostAddress new_hostAddress = new HostAddress(0);
new_hostAddress.addrType = addrType;
if (address != null) {
new_hostAddress.address = address.clone();
}
return new_hostAddress;
}
public int hashCode() {
if (hashCode == 0) {
int result = 17;
result = 37*result + addrType;
if (address != null) {
for (int i=0; i < address.length; i++) {
result = 37*result + address[i];
}
}
hashCode = result;
}
return hashCode;
}
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof HostAddress)) {
return false;
}
HostAddress h = (HostAddress)obj;
if (addrType != h.addrType ||
(address != null && h.address == null) ||
(address == null && h.address != null))
return false;
if (address != null && h.address != null) {
if (address.length != h.address.length)
return false;
for (int i = 0; i < address.length; i++)
if (address[i] != h.address[i])
return false;
}
return true;
}
private static synchronized InetAddress getLocalInetAddress()
throws UnknownHostException {
if (localInetAddress == null) {
localInetAddress = InetAddress.getLocalHost();
}
if (localInetAddress == null) {
throw new UnknownHostException();
}
return (localInetAddress);
}
/**
* Gets the InetAddress of this HostAddress.
* @return the IP address for this specified host.
* @exception if no IP address for the host could be found.
*
*/
public InetAddress getInetAddress() throws UnknownHostException {
// the type of internet addresses is 2.
if (addrType == Krb5.ADDRTYPE_INET ||
addrType == Krb5.ADDRTYPE_INET6) {
return (InetAddress.getByAddress(address));
} else {
// if it is other type (ISO address, XNS address, etc)
return null;
}
}
private int getAddrType(InetAddress inetAddress) {
int addressType = 0;
if (inetAddress instanceof Inet4Address)
addressType = Krb5.ADDRTYPE_INET;
else if (inetAddress instanceof Inet6Address)
addressType = Krb5.ADDRTYPE_INET6;
return (addressType);
}
// implicit default not in Config.java
public HostAddress() throws UnknownHostException {
InetAddress inetAddress = getLocalInetAddress();
addrType = getAddrType(inetAddress);
address = inetAddress.getAddress();
}
/**
* Creates a HostAddress from the specified address and address type.
*
* @param new_addrType the value of the address type which matches the defined
* address family constants in the Berkeley Standard
* Distributions of Unix.
* @param new_address network address.
* @exception KrbApErrException if address type and address length do not match defined value.
*
*/
public HostAddress(int new_addrType, byte[] new_address)
throws KrbApErrException, UnknownHostException {
switch(new_addrType) {
case Krb5.ADDRTYPE_INET: //Internet address
if (new_address.length != 4)
throw new KrbApErrException(0, "Invalid Internet address");
break;
case Krb5.ADDRTYPE_CHAOS:
if (new_address.length != 2) //CHAOSnet address
throw new KrbApErrException(0, "Invalid CHAOSnet address");
break;
case Krb5.ADDRTYPE_ISO: // ISO address
break;
case Krb5.ADDRTYPE_IPX: // XNS address
if (new_address.length != 6)
throw new KrbApErrException(0, "Invalid XNS address");
break;
case Krb5.ADDRTYPE_APPLETALK: //AppleTalk DDP address
if (new_address.length != 3)
throw new KrbApErrException(0, "Invalid DDP address");
break;
case Krb5.ADDRTYPE_DECNET: //DECnet Phase IV address
if (new_address.length != 2)
throw new KrbApErrException(0, "Invalid DECnet Phase IV address");
break;
case Krb5.ADDRTYPE_INET6: //Internet IPv6 address
if (new_address.length != 16)
throw new KrbApErrException(0, "Invalid Internet IPv6 address");
break;
}
addrType = new_addrType;
if (new_address != null) {
address = new_address.clone();
}
if (DEBUG) {
if (addrType == Krb5.ADDRTYPE_INET ||
addrType == Krb5.ADDRTYPE_INET6) {
System.out.println("Host address is " +
InetAddress.getByAddress(address));
}
}
}
public HostAddress(InetAddress inetAddress) {
addrType = getAddrType(inetAddress);
address = inetAddress.getAddress();
}
/**
* Constructs a host address from a single DER-encoded value.
* @param encoding a single DER-encoded value.
* @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 HostAddress(DerValue encoding) throws Asn1Exception, IOException {
DerValue der = encoding.getData().getDerValue();
if ((der.getTag() & (byte)0x1F) == (byte)0x00) {
addrType = der.getData().getBigInteger().intValue();
}
else
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
der = encoding.getData().getDerValue();
if ((der.getTag() & (byte)0x1F) == (byte)0x01) {
address = der.getData().getOctetString();
}
else
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
if (encoding.getData().available() > 0)
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
/**
* Encodes a HostAddress object.
* @return a byte array of encoded HostAddress 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(this.addrType);
bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp);
temp = new DerOutputStream();
temp.putOctetString(address);
bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp);
temp = new DerOutputStream();
temp.write(DerValue.tag_Sequence, bytes);
return temp.toByteArray();
}
/**
* Parses (unmarshal) a host address 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.
* @exception IOException if an I/O error occurs while reading encoded data.
* @param data the Der input stream value, which contains one or more marshaled value.
* @param explicitTag tag number.
* @param optional indicates if this data field is optional
* @return an instance of HostAddress.
*
*/
public static HostAddress 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 HostAddress(subDer);
}
}
}