/*
* Copyright (c) 2000, 2011, 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.PrincipalName;
import sun.security.krb5.KrbException;
import sun.security.krb5.Asn1Exception;
import sun.security.util.*;
import java.net.*;
import java.util.*;
import java.io.IOException;
import sun.security.krb5.internal.ccache.CCacheOutputStream;
/**
* Implements the ASN.1 HostAddresses type.
*
* <pre>{@code
* HostAddresses -- NOTE: subtly different from rfc1510,
* -- but has a value mapping and encodes the same
* ::= SEQUENCE OF HostAddress
*
* HostAddress ::= SEQUENCE {
* addr-type [0] Int32,
* address [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 HostAddresses implements Cloneable {
private static boolean DEBUG = sun.security.krb5.internal.Krb5.DEBUG;
private HostAddress[] addresses = null;
private volatile int hashCode = 0;
public HostAddresses(HostAddress[] new_addresses) throws IOException {
if (new_addresses != null) {
addresses = new HostAddress[new_addresses.length];
for (int i = 0; i < new_addresses.length; i++) {
if (new_addresses[i] == null) {
throw new IOException("Cannot create a HostAddress");
} else {
addresses[i] = (HostAddress)new_addresses[i].clone();
}
}
}
}
public HostAddresses() throws UnknownHostException {
addresses = new HostAddress[1];
addresses[0] = new HostAddress();
}
private HostAddresses(int dummy) {}
public HostAddresses(PrincipalName serverPrincipal)
throws UnknownHostException, KrbException {
String[] components = serverPrincipal.getNameStrings();
if (serverPrincipal.getNameType() != PrincipalName.KRB_NT_SRV_HST ||
components.length < 2)
throw new KrbException(Krb5.KRB_ERR_GENERIC, "Bad name");
String host = components[1];
InetAddress[] addr = InetAddress.getAllByName(host);
HostAddress[] hAddrs = new HostAddress[addr.length];
for (int i = 0; i < addr.length; i++) {
hAddrs[i] = new HostAddress(addr[i]);
}
addresses = hAddrs;
}
public Object clone() {
HostAddresses new_hostAddresses = new HostAddresses(0);
if (addresses != null) {
new_hostAddresses.addresses = new HostAddress[addresses.length];
for (int i = 0; i < addresses.length; i++) {
new_hostAddresses.addresses[i] =
(HostAddress)addresses[i].clone();
}
}
return new_hostAddresses;
}
public boolean inList(HostAddress addr) {
if (addresses != null) {
for (int i = 0; i < addresses.length; i++)
if (addresses[i].equals(addr))
return true;
}
return false;
}
public int hashCode() {
if (hashCode == 0) {
int result = 17;
if (addresses != null) {
for (int i=0; i < addresses.length; i++) {
result = 37*result + addresses[i].hashCode();
}
}
hashCode = result;
}
return hashCode;
}
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof HostAddresses)) {
return false;
}
HostAddresses addrs = (HostAddresses)obj;
if ((addresses == null && addrs.addresses != null) ||
(addresses != null && addrs.addresses == null))
return false;
if (addresses != null && addrs.addresses != null) {
if (addresses.length != addrs.addresses.length)
return false;
for (int i = 0; i < addresses.length; i++)
if (!addresses[i].equals(addrs.addresses[i]))
return false;
}
return true;
}
/**
* Constructs a new <code>HostAddresses</code> object.
* @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 HostAddresses(DerValue encoding)
throws Asn1Exception, IOException {
Vector<HostAddress> tempAddresses = new Vector<>();
DerValue der = null;
while (encoding.getData().available() > 0) {
der = encoding.getData().getDerValue();
tempAddresses.addElement(new HostAddress(der));
}
if (tempAddresses.size() > 0) {
addresses = new HostAddress[tempAddresses.size()];
tempAddresses.copyInto(addresses);
}
}
/**
* Encodes a <code>HostAddresses</code> object.
* @return byte array of encoded <code>HostAddresses</code> 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();
if (addresses != null && addresses.length > 0) {
for (int i = 0; i < addresses.length; i++)
bytes.write(addresses[i].asn1Encode());
}
temp.write(DerValue.tag_Sequence, bytes);
return temp.toByteArray();
}
/**
* Parse (unmarshal) a <code>HostAddresses</code> 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 if an Asn1Exception occurs.
* @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 <code>HostAddresses</code>.
*/
public static HostAddresses 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 HostAddresses(subDer);
}
}
/**
* Writes data field values in <code>HostAddresses</code> in FCC
* format to a <code>CCacheOutputStream</code>.
*
* @param cos a <code>CCacheOutputStream</code> to be written to.
* @exception IOException if an I/O exception occurs.
* @see sun.security.krb5.internal.ccache.CCacheOutputStream
*/
public void writeAddrs(CCacheOutputStream cos) throws IOException {
if (addresses == null || addresses.length == 0) {
cos.write32(0);
return;
}
cos.write32(addresses.length);
for (int i = 0; i < addresses.length; i++) {
cos.write16(addresses[i].addrType);
cos.write32(addresses[i].address.length);
cos.write(addresses[i].address, 0,
addresses[i].address.length);
}
}
public InetAddress[] getInetAddresses() {
if (addresses == null || addresses.length == 0)
return null;
ArrayList<InetAddress> ipAddrs = new ArrayList<>(addresses.length);
for (int i = 0; i < addresses.length; i++) {
try {
if ((addresses[i].addrType == Krb5.ADDRTYPE_INET) ||
(addresses[i].addrType == Krb5.ADDRTYPE_INET6)) {
ipAddrs.add(addresses[i].getInetAddress());
}
} catch (java.net.UnknownHostException e) {
// Should not happen since IP address given
return null;
}
}
InetAddress[] retVal = new InetAddress[ipAddrs.size()];
return ipAddrs.toArray(retVal);
}
/**
* Returns all the IP addresses of the local host.
*/
public static HostAddresses getLocalAddresses() throws IOException
{
Set<InetAddress> all = new LinkedHashSet<>();
try {
if (DEBUG) {
System.out.println(">>> KrbKdcReq local addresses are:");
}
String extra = Config.getInstance().getAll(
"libdefaults", "extra_addresses");
if (extra != null) {
for (String s: extra.split("\\s+")) {
all.add(InetAddress.getByName(s));
if (DEBUG) {
System.out.println(" extra_addresses: "
+ InetAddress.getByName(s));
}
}
}
for (NetworkInterface ni:
Collections.list(NetworkInterface.getNetworkInterfaces())) {
if (DEBUG) {
System.out.println(" NetworkInterface " + ni + ":");
System.out.println(" "
+ Collections.list(ni.getInetAddresses()));
}
all.addAll(Collections.list(ni.getInetAddresses()));
}
return new HostAddresses(all.toArray(new InetAddress[all.size()]));
} catch (Exception exc) {
throw new IOException(exc.toString());
}
}
/**
* Creates a new HostAddresses instance from the supplied list
* of InetAddresses.
*/
public HostAddresses(InetAddress[] inetAddresses)
{
if (inetAddresses == null)
{
addresses = null;
return;
}
addresses = new HostAddress[inetAddresses.length];
for (int i = 0; i < inetAddresses.length; i++)
addresses[i] = new HostAddress(inetAddresses[i]);
}
@Override
public String toString() {
return Arrays.toString(addresses);
}
}