J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Portions Copyright 2000-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | * |
| 28 | * (C) Copyright IBM Corp. 1999 All Rights Reserved. |
| 29 | * Copyright 1997 The Open Group Research Institute. All rights reserved. |
| 30 | */ |
| 31 | |
| 32 | package sun.security.krb5.internal; |
| 33 | |
| 34 | import sun.security.krb5.Config; |
| 35 | import sun.security.krb5.Asn1Exception; |
| 36 | import sun.security.util.*; |
| 37 | import java.net.InetAddress; |
| 38 | import java.net.Inet4Address; |
| 39 | import java.net.Inet6Address; |
| 40 | import java.net.UnknownHostException; |
| 41 | import java.io.IOException; |
| 42 | |
| 43 | /** |
| 44 | * Implements the ASN.1 HostAddress type. |
| 45 | * |
| 46 | * <xmp> |
| 47 | * HostAddress ::= SEQUENCE { |
| 48 | * addr-type [0] Int32, |
| 49 | * address [1] OCTET STRING |
| 50 | * } |
| 51 | * </xmp> |
| 52 | * |
| 53 | * <p> |
| 54 | * This definition reflects the Network Working Group RFC 4120 |
| 55 | * specification available at |
| 56 | * <a href="http://www.ietf.org/rfc/rfc4120.txt"> |
| 57 | * http://www.ietf.org/rfc/rfc4120.txt</a>. |
| 58 | */ |
| 59 | |
| 60 | public class HostAddress implements Cloneable { |
| 61 | int addrType; |
| 62 | byte[] address = null; |
| 63 | |
| 64 | private static InetAddress localInetAddress; //caches local inet address |
| 65 | private static final boolean DEBUG = sun.security.krb5.internal.Krb5.DEBUG; |
| 66 | private volatile int hashCode = 0; |
| 67 | |
| 68 | private HostAddress(int dummy) {} |
| 69 | |
| 70 | public Object clone() { |
| 71 | HostAddress new_hostAddress = new HostAddress(0); |
| 72 | new_hostAddress.addrType = addrType; |
| 73 | if (address != null) { |
| 74 | new_hostAddress.address = address.clone(); |
| 75 | } |
| 76 | return new_hostAddress; |
| 77 | } |
| 78 | |
| 79 | |
| 80 | public int hashCode() { |
| 81 | if (hashCode == 0) { |
| 82 | int result = 17; |
| 83 | result = 37*result + addrType; |
| 84 | if (address != null) { |
| 85 | for (int i=0; i < address.length; i++) { |
| 86 | result = 37*result + address[i]; |
| 87 | } |
| 88 | } |
| 89 | hashCode = result; |
| 90 | } |
| 91 | return hashCode; |
| 92 | |
| 93 | } |
| 94 | |
| 95 | public boolean equals(Object obj) { |
| 96 | if (this == obj) { |
| 97 | return true; |
| 98 | } |
| 99 | |
| 100 | if (!(obj instanceof HostAddress)) { |
| 101 | return false; |
| 102 | } |
| 103 | |
| 104 | HostAddress h = (HostAddress)obj; |
| 105 | if (addrType != h.addrType || |
| 106 | (address != null && h.address == null) || |
| 107 | (address == null && h.address != null)) |
| 108 | return false; |
| 109 | if (address != null && h.address != null) { |
| 110 | if (address.length != h.address.length) |
| 111 | return false; |
| 112 | for (int i = 0; i < address.length; i++) |
| 113 | if (address[i] != h.address[i]) |
| 114 | return false; |
| 115 | } |
| 116 | return true; |
| 117 | } |
| 118 | |
| 119 | private static synchronized InetAddress getLocalInetAddress() |
| 120 | throws UnknownHostException { |
| 121 | |
| 122 | if (localInetAddress == null) { |
| 123 | localInetAddress = InetAddress.getLocalHost(); |
| 124 | } |
| 125 | if (localInetAddress == null) { |
| 126 | throw new UnknownHostException(); |
| 127 | } |
| 128 | return (localInetAddress); |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Gets the InetAddress of this HostAddress. |
| 133 | * @return the IP address for this specified host. |
| 134 | * @exception if no IP address for the host could be found. |
| 135 | * |
| 136 | */ |
| 137 | public InetAddress getInetAddress() throws UnknownHostException { |
| 138 | // the type of internet addresses is 2. |
| 139 | if (addrType == Krb5.ADDRTYPE_INET || |
| 140 | addrType == Krb5.ADDRTYPE_INET6) { |
| 141 | return (InetAddress.getByAddress(address)); |
| 142 | } else { |
| 143 | // if it is other type (ISO address, XNS address, etc) |
| 144 | return null; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | private int getAddrType(InetAddress inetAddress) { |
| 149 | int addressType = 0; |
| 150 | if (inetAddress instanceof Inet4Address) |
| 151 | addressType = Krb5.ADDRTYPE_INET; |
| 152 | else if (inetAddress instanceof Inet6Address) |
| 153 | addressType = Krb5.ADDRTYPE_INET6; |
| 154 | return (addressType); |
| 155 | } |
| 156 | |
| 157 | // implicit default not in Config.java |
| 158 | public HostAddress() throws UnknownHostException { |
| 159 | InetAddress inetAddress = getLocalInetAddress(); |
| 160 | addrType = getAddrType(inetAddress); |
| 161 | address = inetAddress.getAddress(); |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * Creates a HostAddress from the specified address and address type. |
| 166 | * |
| 167 | * @param new_addrType the value of the address type which matches the defined |
| 168 | * address family constants in the Berkeley Standard |
| 169 | * Distributions of Unix. |
| 170 | * @param new_address network address. |
| 171 | * @exception KrbApErrException if address type and address length do not match defined value. |
| 172 | * |
| 173 | */ |
| 174 | public HostAddress(int new_addrType, byte[] new_address) |
| 175 | throws KrbApErrException, UnknownHostException { |
| 176 | switch(new_addrType) { |
| 177 | case Krb5.ADDRTYPE_INET: //Internet address |
| 178 | if (new_address.length != 4) |
| 179 | throw new KrbApErrException(0, "Invalid Internet address"); |
| 180 | break; |
| 181 | case Krb5.ADDRTYPE_CHAOS: |
| 182 | if (new_address.length != 2) //CHAOSnet address |
| 183 | throw new KrbApErrException(0, "Invalid CHAOSnet address"); |
| 184 | break; |
| 185 | case Krb5.ADDRTYPE_ISO: // ISO address |
| 186 | break; |
| 187 | case Krb5.ADDRTYPE_IPX: // XNS address |
| 188 | if (new_address.length != 6) |
| 189 | throw new KrbApErrException(0, "Invalid XNS address"); |
| 190 | break; |
| 191 | case Krb5.ADDRTYPE_APPLETALK: //AppleTalk DDP address |
| 192 | if (new_address.length != 3) |
| 193 | throw new KrbApErrException(0, "Invalid DDP address"); |
| 194 | break; |
| 195 | case Krb5.ADDRTYPE_DECNET: //DECnet Phase IV address |
| 196 | if (new_address.length != 2) |
| 197 | throw new KrbApErrException(0, "Invalid DECnet Phase IV address"); |
| 198 | break; |
| 199 | case Krb5.ADDRTYPE_INET6: //Internet IPv6 address |
| 200 | if (new_address.length != 16) |
| 201 | throw new KrbApErrException(0, "Invalid Internet IPv6 address"); |
| 202 | break; |
| 203 | } |
| 204 | |
| 205 | addrType = new_addrType; |
| 206 | if (new_address != null) { |
| 207 | address = new_address.clone(); |
| 208 | } |
| 209 | if (DEBUG) { |
| 210 | if (addrType == Krb5.ADDRTYPE_INET || |
| 211 | addrType == Krb5.ADDRTYPE_INET6) { |
| 212 | System.out.println("Host address is " + |
| 213 | InetAddress.getByAddress(address)); |
| 214 | } |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | public HostAddress(InetAddress inetAddress) { |
| 219 | addrType = getAddrType(inetAddress); |
| 220 | address = inetAddress.getAddress(); |
| 221 | } |
| 222 | |
| 223 | /** |
| 224 | * Constructs a host address from a single DER-encoded value. |
| 225 | * @param encoding a single DER-encoded value. |
| 226 | * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
| 227 | * @exception IOException if an I/O error occurs while reading encoded data. |
| 228 | * |
| 229 | */ |
| 230 | public HostAddress(DerValue encoding) throws Asn1Exception, IOException { |
| 231 | DerValue der = encoding.getData().getDerValue(); |
| 232 | if ((der.getTag() & (byte)0x1F) == (byte)0x00) { |
| 233 | addrType = der.getData().getBigInteger().intValue(); |
| 234 | } |
| 235 | else |
| 236 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 237 | der = encoding.getData().getDerValue(); |
| 238 | if ((der.getTag() & (byte)0x1F) == (byte)0x01) { |
| 239 | address = der.getData().getOctetString(); |
| 240 | } |
| 241 | else |
| 242 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 243 | if (encoding.getData().available() > 0) |
| 244 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * Encodes a HostAddress object. |
| 249 | * @return a byte array of encoded HostAddress object. |
| 250 | * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
| 251 | * @exception IOException if an I/O error occurs while reading encoded data. |
| 252 | * |
| 253 | */ |
| 254 | |
| 255 | public byte[] asn1Encode() throws Asn1Exception, IOException { |
| 256 | DerOutputStream bytes = new DerOutputStream(); |
| 257 | DerOutputStream temp = new DerOutputStream(); |
| 258 | temp.putInteger(this.addrType); |
| 259 | bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp); |
| 260 | temp = new DerOutputStream(); |
| 261 | temp.putOctetString(address); |
| 262 | bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp); |
| 263 | temp = new DerOutputStream(); |
| 264 | temp.write(DerValue.tag_Sequence, bytes); |
| 265 | return temp.toByteArray(); |
| 266 | } |
| 267 | |
| 268 | /** |
| 269 | * Parses (unmarshal) a host address from a DER input stream. This form |
| 270 | * parsing might be used when expanding a value which is part of |
| 271 | * a constructed sequence and uses explicitly tagged type. |
| 272 | * |
| 273 | * @exception Asn1Exception on error. |
| 274 | * @exception IOException if an I/O error occurs while reading encoded data. |
| 275 | * @param data the Der input stream value, which contains one or more marshaled value. |
| 276 | * @param explicitTag tag number. |
| 277 | * @param optional indicates if this data field is optional |
| 278 | * @return an instance of HostAddress. |
| 279 | * |
| 280 | */ |
| 281 | public static HostAddress parse(DerInputStream data, byte explicitTag, |
| 282 | boolean optional) |
| 283 | throws Asn1Exception, IOException{ |
| 284 | if ((optional) && |
| 285 | (((byte)data.peekByte() & (byte)0x1F) != explicitTag)) { |
| 286 | return null; |
| 287 | } |
| 288 | DerValue der = data.getDerValue(); |
| 289 | if (explicitTag != (der.getTag() & (byte)0x1F)) { |
| 290 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 291 | } |
| 292 | else { |
| 293 | DerValue subDer = der.getData().getDerValue(); |
| 294 | return new HostAddress(subDer); |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | } |