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308 lines
11 KiB
Java
308 lines
11 KiB
Java
/*
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* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
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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.krb5.Config;
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import sun.security.krb5.Asn1Exception;
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import sun.security.util.*;
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import java.net.InetAddress;
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import java.net.Inet4Address;
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import java.net.Inet6Address;
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import java.net.UnknownHostException;
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import java.io.IOException;
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import java.util.Arrays;
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/**
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* Implements the ASN.1 HostAddress type.
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*
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* <pre>{@code
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* HostAddress ::= SEQUENCE {
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* addr-type [0] Int32,
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* address [1] OCTET STRING
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* }
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* }</pre>
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*
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* <p>
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* This definition reflects the Network Working Group RFC 4120
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* specification available at
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* <a href="http://www.ietf.org/rfc/rfc4120.txt">
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* http://www.ietf.org/rfc/rfc4120.txt</a>.
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*/
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public class HostAddress implements Cloneable {
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int addrType;
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byte[] address = null;
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private static InetAddress localInetAddress; //caches local inet address
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private static final boolean DEBUG = sun.security.krb5.internal.Krb5.DEBUG;
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private volatile int hashCode = 0;
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private HostAddress(int dummy) {}
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public Object clone() {
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HostAddress new_hostAddress = new HostAddress(0);
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new_hostAddress.addrType = addrType;
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if (address != null) {
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new_hostAddress.address = address.clone();
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}
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return new_hostAddress;
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}
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public int hashCode() {
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if (hashCode == 0) {
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int result = 17;
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result = 37*result + addrType;
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if (address != null) {
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for (int i=0; i < address.length; i++) {
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result = 37*result + address[i];
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}
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}
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hashCode = result;
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}
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return hashCode;
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}
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public boolean equals(Object obj) {
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if (this == obj) {
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return true;
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}
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if (!(obj instanceof HostAddress)) {
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return false;
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}
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HostAddress h = (HostAddress)obj;
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if (addrType != h.addrType ||
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(address != null && h.address == null) ||
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(address == null && h.address != null))
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return false;
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if (address != null && h.address != null) {
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if (address.length != h.address.length)
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return false;
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for (int i = 0; i < address.length; i++)
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if (address[i] != h.address[i])
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return false;
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}
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return true;
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}
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private static synchronized InetAddress getLocalInetAddress()
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throws UnknownHostException {
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if (localInetAddress == null) {
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localInetAddress = InetAddress.getLocalHost();
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}
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if (localInetAddress == null) {
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throw new UnknownHostException();
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}
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return (localInetAddress);
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}
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/**
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* Gets the InetAddress of this HostAddress.
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* @return the IP address for this specified host.
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* @exception UnknownHostException if no IP address for the host could be found.
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*
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*/
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public InetAddress getInetAddress() throws UnknownHostException {
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// the type of internet addresses is 2.
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if (addrType == Krb5.ADDRTYPE_INET ||
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addrType == Krb5.ADDRTYPE_INET6) {
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return (InetAddress.getByAddress(address));
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} else {
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// if it is other type (ISO address, XNS address, etc)
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return null;
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}
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}
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private int getAddrType(InetAddress inetAddress) {
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int addressType = 0;
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if (inetAddress instanceof Inet4Address)
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addressType = Krb5.ADDRTYPE_INET;
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else if (inetAddress instanceof Inet6Address)
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addressType = Krb5.ADDRTYPE_INET6;
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return (addressType);
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}
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// implicit default not in Config.java
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public HostAddress() throws UnknownHostException {
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InetAddress inetAddress = getLocalInetAddress();
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addrType = getAddrType(inetAddress);
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address = inetAddress.getAddress();
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}
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/**
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* Creates a HostAddress from the specified address and address type.
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*
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* Warning: called by nativeccache.c.
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*
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* @param new_addrType the value of the address type which matches the defined
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* address family constants in the Berkeley Standard
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* Distributions of Unix.
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* @param new_address network address.
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* @exception KrbApErrException if address type and address length do not match defined value.
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*
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*/
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public HostAddress(int new_addrType, byte[] new_address)
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throws KrbApErrException, UnknownHostException {
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switch(new_addrType) {
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case Krb5.ADDRTYPE_INET: //Internet address
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if (new_address.length != 4)
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throw new KrbApErrException(0, "Invalid Internet address");
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break;
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case Krb5.ADDRTYPE_CHAOS:
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if (new_address.length != 2) //CHAOSnet address
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throw new KrbApErrException(0, "Invalid CHAOSnet address");
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break;
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case Krb5.ADDRTYPE_ISO: // ISO address
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break;
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case Krb5.ADDRTYPE_IPX: // XNS address
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if (new_address.length != 6)
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throw new KrbApErrException(0, "Invalid XNS address");
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break;
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case Krb5.ADDRTYPE_APPLETALK: //AppleTalk DDP address
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if (new_address.length != 3)
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throw new KrbApErrException(0, "Invalid DDP address");
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break;
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case Krb5.ADDRTYPE_DECNET: //DECnet Phase IV address
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if (new_address.length != 2)
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throw new KrbApErrException(0, "Invalid DECnet Phase IV address");
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break;
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case Krb5.ADDRTYPE_INET6: //Internet IPv6 address
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if (new_address.length != 16)
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throw new KrbApErrException(0, "Invalid Internet IPv6 address");
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break;
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}
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addrType = new_addrType;
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if (new_address != null) {
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address = new_address.clone();
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}
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if (DEBUG) {
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if (addrType == Krb5.ADDRTYPE_INET ||
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addrType == Krb5.ADDRTYPE_INET6) {
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System.out.println("Host address is " +
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InetAddress.getByAddress(address));
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}
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}
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}
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public HostAddress(InetAddress inetAddress) {
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addrType = getAddrType(inetAddress);
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address = inetAddress.getAddress();
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}
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/**
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* Constructs a host address from a single DER-encoded value.
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* @param encoding a single DER-encoded value.
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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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*/
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public HostAddress(DerValue encoding) throws Asn1Exception, IOException {
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DerValue der = encoding.getData().getDerValue();
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if ((der.getTag() & (byte)0x1F) == (byte)0x00) {
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addrType = der.getData().getBigInteger().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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der = encoding.getData().getDerValue();
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if ((der.getTag() & (byte)0x1F) == (byte)0x01) {
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address = der.getData().getOctetString();
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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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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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/**
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* Encodes a HostAddress object.
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* @return a byte array of encoded HostAddress 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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*/
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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(this.addrType);
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp);
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temp = new DerOutputStream();
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temp.putOctetString(address);
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp);
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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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* Parses (unmarshal) a host address from a DER input stream. This form
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* parsing might be used when expanding a value which is part of
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* a constructed sequence and uses explicitly tagged type.
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*
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* @exception Asn1Exception on error.
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* @exception IOException if an I/O error occurs while reading encoded data.
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* @param data the Der input stream value, which contains one or more marshaled value.
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* @param explicitTag tag number.
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* @param optional indicates if this data field is optional
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* @return an instance of HostAddress.
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*
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*/
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public static HostAddress parse(DerInputStream data, byte explicitTag,
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boolean optional)
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throws Asn1Exception, IOException{
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if ((optional) &&
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(((byte)data.peekByte() & (byte)0x1F) != explicitTag)) {
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return null;
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}
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DerValue der = data.getDerValue();
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if (explicitTag != (der.getTag() & (byte)0x1F)) {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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else {
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DerValue subDer = der.getData().getDerValue();
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return new HostAddress(subDer);
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}
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}
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@Override
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public String toString() {
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StringBuilder sb = new StringBuilder();
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sb.append(Arrays.toString(address));
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sb.append('(').append(addrType).append(')');
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return sb.toString();
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}
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}
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