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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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.PrincipalName;
import sun.security.krb5.KrbException;
import sun.security.krb5.Asn1Exception;
import sun.security.util.*;
import java.util.Vector;
import java.util.ArrayList;
import java.net.InetAddress;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.UnknownHostException;
import java.io.IOException;
import sun.security.krb5.internal.ccache.CCacheOutputStream;

Implements the ASN.1 HostAddresses type. 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 }

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

/** * Implements the ASN.1 HostAddresses type. * * <xmp> * 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 * } * </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 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 HostAddresses object.
Params:
  • encoding – a single DER-encoded value.
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 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<HostAddress> (); 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 HostAddresses 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:byte array of encoded HostAddresses object.
/** * 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 HostAddresses 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 – indicates if this data field is optional.
Throws:
  • Asn1Exception – if an Asn1Exception occurs.
Returns:an instance of HostAddresses.
/** * 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 HostAddresses in FCC format to a CCacheOutputStream.
Params:
  • cos – a CCacheOutputStream to be written to.
Throws:
See Also:
/** * 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 { 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<InetAddress> (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.
/** * Returns all the IP addresses of the local host. */
public static HostAddresses getLocalAddresses() throws IOException { String hostname = null; InetAddress[] inetAddresses = null; try { InetAddress localHost = InetAddress.getLocalHost(); hostname = localHost.getHostName(); inetAddresses = InetAddress.getAllByName(hostname); HostAddress[] hAddresses = new HostAddress[inetAddresses.length]; for (int i = 0; i < inetAddresses.length; i++) { hAddresses[i] = new HostAddress(inetAddresses[i]); } if (DEBUG) { System.out.println(">>> KrbKdcReq local addresses for " + hostname + " are: "); for (int i = 0; i < inetAddresses.length; i++) { System.out.println("\n\t" + inetAddresses[i]); if (inetAddresses[i] instanceof Inet4Address) System.out.println("IPv4 address"); if (inetAddresses[i] instanceof Inet6Address) System.out.println("IPv6 address"); } } return (new HostAddresses(hAddresses)); } catch (Exception exc) { throw new IOException(exc.toString()); } }
Creates a new HostAddresses instance from the supplied list of InetAddresses.
/** * 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]); } }