J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * 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 | package com.sun.security.auth.module; |
| 28 | |
| 29 | import java.io.*; |
| 30 | import java.net.*; |
| 31 | import java.text.MessageFormat; |
| 32 | import java.util.*; |
| 33 | |
| 34 | import javax.security.auth.*; |
| 35 | import javax.security.auth.kerberos.*; |
| 36 | import javax.security.auth.callback.*; |
| 37 | import javax.security.auth.login.*; |
| 38 | import javax.security.auth.spi.*; |
| 39 | |
| 40 | import sun.security.krb5.*; |
| 41 | import sun.security.krb5.Config; |
| 42 | import sun.security.krb5.RealmException; |
| 43 | import sun.security.util.AuthResources; |
| 44 | import sun.security.jgss.krb5.Krb5Util; |
| 45 | import sun.security.krb5.Credentials; |
| 46 | import sun.misc.HexDumpEncoder; |
| 47 | |
| 48 | /** |
| 49 | * <p> This <code>LoginModule</code> authenticates users using |
| 50 | * Kerberos protocols. |
| 51 | * |
| 52 | * <p> The configuration entry for <code>Krb5LoginModule</code> has |
| 53 | * several options that control the authentication process and |
| 54 | * additions to the <code>Subject</code>'s private credential |
| 55 | * set. Irrespective of these options, the <code>Subject</code>'s |
| 56 | * principal set and private credentials set are updated only when |
| 57 | * <code>commit</code> is called. |
| 58 | * When <code>commit</code> is called, the <code>KerberosPrincipal</code> |
| 59 | * is added to the <code>Subject</code>'s |
| 60 | * principal set and <code>KerberosTicket</code> is |
| 61 | * added to the <code>Subject</code>'s private credentials. |
| 62 | * |
| 63 | * <p> If the configuration entry for <code>KerberosLoginModule</code> |
| 64 | * has the option <code>storeKey</code> set to true, then |
| 65 | * <code>KerberosKey</code> will also be added to the |
| 66 | * subject's private credentials. <code>KerberosKey</code>, the principal's |
| 67 | * key will be either obtained from the keytab or |
| 68 | * derived from user's password. |
| 69 | * |
| 70 | * <p> This <code>LoginModule</code> recognizes the <code>doNotPrompt</code> |
| 71 | * option. If set to true the user will not be prompted for the password. |
| 72 | * |
| 73 | * <p> The user can specify the location of the ticket cache by using |
| 74 | * the option <code>ticketCache</code> in the configuration entry. |
| 75 | * |
| 76 | * <p>The user can specify the keytab location by using |
| 77 | * the option <code>keyTab</code> |
| 78 | * in the configuration entry. |
| 79 | * |
| 80 | * <p> The principal name can be specified in the configuration entry |
| 81 | * by using the option <code>principal</code>. The principal name |
| 82 | * can either be a simple user name or a service name such as |
| 83 | * <code>host/mission.eng.sun.com</code>. The principal can also |
| 84 | * be set using the system property <code>sun.security.krb5.principal</code>. |
| 85 | * This property is checked during login. If this property is not set, then |
| 86 | * the principal name from the configuration is used. In the |
| 87 | * case where the principal property is not set and the principal |
| 88 | * entry also does not exist, the user is prompted for the name. |
| 89 | * |
| 90 | * <p> The following is a list of configuration options supported |
| 91 | * for <code>Krb5LoginModule</code>: |
| 92 | * <dl> |
| 93 | * <blockquote><dt><b><code>refreshKrb5Config</code></b>:</dt> |
| 94 | * <dd> Set this to true, if you want the configuration |
| 95 | * to be refreshed before the <code>login</code> method is called.</dd> |
| 96 | * <P> |
| 97 | * <dt><b><code>useTicketCache</code></b>:</dt> |
| 98 | * <dd>Set this to true, if you want the |
| 99 | * TGT to be obtained |
| 100 | * from the ticket cache. Set this option |
| 101 | * to false if you do not want this module to use the ticket cache. |
| 102 | * (Default is False). |
| 103 | * This module will |
| 104 | * search for the tickect |
| 105 | * cache in the following locations: |
| 106 | * For Windows 2000, it will use Local Security Authority (LSA) API |
| 107 | * to get the TGT. On Solaris and Linux |
| 108 | * it will look for the ticket cache in /tmp/krb5cc_<code>uid</code> |
| 109 | * where the uid is numeric user |
| 110 | * identifier. If the ticket cache is |
| 111 | * not available in either of the above locations, or if we are on a |
| 112 | * different Windows platform, it will look for the cache as |
| 113 | * {user.home}{file.separator}krb5cc_{user.name}. |
| 114 | * You can override the ticket cache location by using |
| 115 | * <code>ticketCache</code> |
| 116 | * <P> |
| 117 | * <dt><b><code>ticketCache</code></b>:</dt> |
| 118 | * <dd>Set this to the name of the ticket |
| 119 | * cache that contains user's TGT. |
| 120 | * If this is set, <code>useTicketCache</code> |
| 121 | * must also be set to true; Otherwise a configuration error will |
| 122 | * be returned.</dd> |
| 123 | * <P> |
| 124 | * <dt><b><code>renewTGT</code></b>:</dt> |
| 125 | * <dd>Set this to true, if you want to renew |
| 126 | * the TGT. If this is set, <code>useTicketCache</code> must also be |
| 127 | * set to true; otherwise a configuration error will be returned.</dd> |
| 128 | * <p> |
| 129 | * <dt><b><code>doNotPrompt</code></b>:</dt> |
| 130 | * <dd>Set this to true if you do not want to be |
| 131 | * prompted for the password |
| 132 | * if credentials can |
| 133 | * not be obtained from the cache or keytab.(Default is false) |
| 134 | * If set to true authentication will fail if credentials can |
| 135 | * not be obtained from the cache or keytab.</dd> |
| 136 | * <P> |
| 137 | * <dt><b><code>useKeyTab</code></b>:</dt> |
| 138 | * <dd>Set this to true if you |
| 139 | * want the module to get the principal's key from the |
| 140 | * the keytab.(default value is False) |
| 141 | * If <code>keyatb</code> |
| 142 | * is not set then |
| 143 | * the module will locate the keytab from the |
| 144 | * Kerberos configuration file.</dd> |
| 145 | * If it is not specifed in the Kerberos configuration file |
| 146 | * then it will look for the file |
| 147 | * <code>{user.home}{file.separator}</code>krb5.keytab.</dd> |
| 148 | * <P> |
| 149 | * <dt><b><code>keyTab</code></b>:</dt> |
| 150 | * <dd>Set this to the file name of the |
| 151 | * keytab to get principal's secret key.</dd> |
| 152 | * <P> |
| 153 | * <dt><b><code>storeKey</code></b>:</dt> |
| 154 | * <dd>Set this to true to if you want the |
| 155 | * principal's key to be stored in the Subject's private credentials. </dd> |
| 156 | * <p> |
| 157 | * <dt><b><code>principal</code></b>:</dt> |
| 158 | * <dd>The name of the principal that should |
| 159 | * be used. The principal can be a simple username such as |
| 160 | * "<code>testuser</code>" or a service name such as |
| 161 | * "<code>host/testhost.eng.sun.com</code>". You can use the |
| 162 | * <code>principal</code> option to set the principal when there are |
| 163 | * credentials for multiple principals in the |
| 164 | * <code>keyTab</code> or when you want a specific ticket cache only. |
| 165 | * The principal can also be set using the system property |
| 166 | * <code>sun.security.krb5.principal</code>. In addition, if this |
| 167 | * system property is defined, then it will be used. If this property |
| 168 | * is not set, then the principal name from the configuration will be |
| 169 | * used.</dd> |
| 170 | * <P> |
| 171 | * <dt><b><code>isInitiator</code></b>:</dt> |
| 172 | * <dd>Set this to true, if initiator. Set this to false, if acceptor only. |
| 173 | * (Default is true). |
| 174 | * Note: Do not set this value to false for initiators.</dd> |
| 175 | * </dl></blockquote> |
| 176 | * |
| 177 | * <p> This <code>LoginModule</code> also recognizes the following additional |
| 178 | * <code>Configuration</code> |
| 179 | * options that enable you to share username and passwords across different |
| 180 | * authentication modules: |
| 181 | * <pre> |
| 182 | * |
| 183 | * useFirstPass if, true, this LoginModule retrieves the |
| 184 | * username and password from the module's shared state, |
| 185 | * using "javax.security.auth.login.name" and |
| 186 | * "javax.security.auth.login.password" as the respective |
| 187 | * keys. The retrieved values are used for authentication. |
| 188 | * If authentication fails, no attempt for a retry |
| 189 | * is made, and the failure is reported back to the |
| 190 | * calling application. |
| 191 | * |
| 192 | * tryFirstPass if, true, this LoginModule retrieves the |
| 193 | * the username and password from the module's shared |
| 194 | * state using "javax.security.auth.login.name" and |
| 195 | * "javax.security.auth.login.password" as the respective |
| 196 | * keys. The retrieved values are used for |
| 197 | * authentication. |
| 198 | * If authentication fails, the module uses the |
| 199 | * CallbackHandler to retrieve a new username |
| 200 | * and password, and another attempt to authenticate |
| 201 | * is made. If the authentication fails, |
| 202 | * the failure is reported back to the calling application |
| 203 | * |
| 204 | * storePass if, true, this LoginModule stores the username and |
| 205 | * password obtained from the CallbackHandler in the |
| 206 | * modules shared state, using |
| 207 | * "javax.security.auth.login.name" and |
| 208 | * "javax.security.auth.login.password" as the respective |
| 209 | * keys. This is not performed if existing values already |
| 210 | * exist for the username and password in the shared |
| 211 | * state, or if authentication fails. |
| 212 | * |
| 213 | * clearPass if, true, this <code>LoginModule</code> clears the |
| 214 | * username and password stored in the module's shared |
| 215 | * state after both phases of authentication |
| 216 | * (login and commit) have completed. |
| 217 | * </pre> |
| 218 | * <p>Examples of some configuration values for Krb5LoginModule in |
| 219 | * JAAS config file and the results are: |
| 220 | * <ul> |
| 221 | * <p> <code>doNotPrompt</code>=true; |
| 222 | * </ul> |
| 223 | * <p> This is an illegal combination since <code>useTicketCache</code> |
| 224 | * is not set and the user can not be prompted for the password. |
| 225 | *<ul> |
| 226 | * <p> <code>ticketCache</code> = < filename >; |
| 227 | *</ul> |
| 228 | * <p> This is an illegal combination since <code>useTicketCache</code> |
| 229 | * is not set to true and the ticketCache is set. A configuration error |
| 230 | * will occur. |
| 231 | * <ul> |
| 232 | * <p> <code>renewTGT</code>=true; |
| 233 | *</ul> |
| 234 | * <p> This is an illegal combination since <code>useTicketCache</code> is |
| 235 | * not set to true and renewTGT is set. A configuration error will occur. |
| 236 | * <ul> |
| 237 | * <p> <code>storeKey</code>=true |
| 238 | * <code>useTicketCache</code> = true |
| 239 | * <code>doNotPrompt</code>=true;; |
| 240 | *</ul> |
| 241 | * <p> This is an illegal combination since <code>storeKey</code> is set to |
| 242 | * true but the key can not be obtained either by prompting the user or from |
| 243 | * the keytab.A configuration error will occur. |
| 244 | * <ul> |
| 245 | * <p> <code>keyTab</code> = < filename > <code>doNotPrompt</code>=true ; |
| 246 | * </ul> |
| 247 | * <p>This is an illegal combination since useKeyTab is not set to true and |
| 248 | * the keyTab is set. A configuration error will occur. |
| 249 | * <ul> |
| 250 | * <p> <code>debug=true </code> |
| 251 | *</ul> |
| 252 | * <p> Prompt the user for the principal name and the password. |
| 253 | * Use the authentication exchange to get TGT from the KDC and |
| 254 | * populate the <code>Subject</code> with the principal and TGT. |
| 255 | * Output debug messages. |
| 256 | * <ul> |
| 257 | * <p> <code>useTicketCache</code> = true <code>doNotPrompt</code>=true; |
| 258 | *</ul> |
| 259 | * <p>Check the default cache for TGT and populate the <code>Subject</code> |
| 260 | * with the principal and TGT. If the TGT is not available, |
| 261 | * do not prompt the user, instead fail the authentication. |
| 262 | * <ul> |
| 263 | * <p><code>principal</code>=< name ><code>useTicketCache</code> = true |
| 264 | * <code>doNotPrompt</code>=true; |
| 265 | *</ul> |
| 266 | * <p> Get the TGT from the default cache for the principal and populate the |
| 267 | * Subject's principal and private creds set. If ticket cache is |
| 268 | * not available or does not contain the principal's TGT |
| 269 | * authentication will fail. |
| 270 | * <ul> |
| 271 | * <p> <code>useTicketCache</code> = true |
| 272 | * <code>ticketCache</code>=< file name ><code>useKeyTab</code> = true |
| 273 | * <code> keyTab</code>=< keytab filename > |
| 274 | * <code>principal</code> = < principal name > |
| 275 | * <code>doNotPrompt</code>=true; |
| 276 | *</ul> |
| 277 | * <p> Search the cache for the principal's TGT. If it is not available |
| 278 | * use the key in the keytab to perform authentication exchange with the |
| 279 | * KDC and acquire the TGT. |
| 280 | * The Subject will be populated with the principal and the TGT. |
| 281 | * If the key is not available or valid then authentication will fail. |
| 282 | * <ul> |
| 283 | * <p><code>useTicketCache</code> = true |
| 284 | * <code>ticketCache</code>=< file name > |
| 285 | *</ul> |
| 286 | * <p> The TGT will be obtained from the cache specified. |
| 287 | * The Kerberos principal name used will be the principal name in |
| 288 | * the Ticket cache. If the TGT is not available in the |
| 289 | * ticket cache the user will be prompted for the principal name |
| 290 | * and the password. The TGT will be obtained using the authentication |
| 291 | * exchange with the KDC. |
| 292 | * The Subject will be populated with the TGT. |
| 293 | *<ul> |
| 294 | * <p> <code>useKeyTab</code> = true |
| 295 | * <code>keyTab</code>=< keytab filename > |
| 296 | * <code>principal</code>= < principal name > |
| 297 | * <code>storeKey</code>=true; |
| 298 | *</ul> |
| 299 | * <p> The key for the principal will be retrieved from the keytab. |
| 300 | * If the key is not available in the keytab the user will be prompted |
| 301 | * for the principal's password. The Subject will be populated |
| 302 | * with the principal's key either from the keytab or derived from the |
| 303 | * password entered. |
| 304 | * <ul> |
| 305 | * <p> <code>useKeyTab</code> = true |
| 306 | * <code>keyTab</code>=< keytabname > |
| 307 | * <code>storeKey</code>=true |
| 308 | * <code>doNotPrompt</code>=true; |
| 309 | *</ul> |
| 310 | * <p>The user will be prompted for the service principal name. |
| 311 | * If the principal's |
| 312 | * longterm key is available in the keytab , it will be added to the |
| 313 | * Subject's private credentials. An authentication exchange will be |
| 314 | * attempted with the principal name and the key from the Keytab. |
| 315 | * If successful the TGT will be added to the |
| 316 | * Subject's private credentials set. Otherwise the authentication will |
| 317 | * fail. |
| 318 | *<ul> |
| 319 | * <p><code>useKeyTab</code> = true |
| 320 | * <code>keyTab</code>=< file name > <code>storeKey</code>=true |
| 321 | * <code>principal</code>= < principal name > |
| 322 | * <code>useTicketCache</code>=true |
| 323 | * <code>ticketCache</code>=< file name >; |
| 324 | *</ul> |
| 325 | * <p>The principal's key will be retrieved from the keytab and added |
| 326 | * to the <code>Subject</code>'s private credentials. If the key |
| 327 | * is not available, the |
| 328 | * user will be prompted for the password; the key derived from the password |
| 329 | * will be added to the Subject's private credentials set. The |
| 330 | * client's TGT will be retrieved from the ticket cache and added to the |
| 331 | * <code>Subject</code>'s private credentials. If the TGT is not available |
| 332 | * in the ticket cache, it will be obtained using the authentication |
| 333 | * exchange and added to the Subject's private credentials. |
| 334 | * <ul> |
| 335 | * <p><code>isInitiator</code> = false |
| 336 | *</ul> |
| 337 | * <p>Configured to act as acceptor only, credentials are not acquired |
| 338 | * via AS exchange. For acceptors only, set this value to false. |
| 339 | * For initiators, do not set this value to false. |
| 340 | * <ul> |
| 341 | * <p><code>isInitiator</code> = true |
| 342 | *</ul> |
| 343 | * <p>Configured to act as initiator, credentials are acquired |
| 344 | * via AS exchange. For initiators, set this value to true, or leave this |
| 345 | * option unset, in which case default value (true) will be used. |
| 346 | * |
| 347 | * @author Ram Marti |
| 348 | */ |
| 349 | |
| 350 | public class Krb5LoginModule implements LoginModule { |
| 351 | |
| 352 | // initial state |
| 353 | private Subject subject; |
| 354 | private CallbackHandler callbackHandler; |
| 355 | private Map sharedState; |
| 356 | private Map<String, ?> options; |
| 357 | |
| 358 | // configurable option |
| 359 | private boolean debug = false; |
| 360 | private boolean storeKey = false; |
| 361 | private boolean doNotPrompt = false; |
| 362 | private boolean useTicketCache = false; |
| 363 | private boolean useKeyTab = false; |
| 364 | private String ticketCacheName = null; |
| 365 | private String keyTabName = null; |
| 366 | private String princName = null; |
| 367 | |
| 368 | private boolean useFirstPass = false; |
| 369 | private boolean tryFirstPass = false; |
| 370 | private boolean storePass = false; |
| 371 | private boolean clearPass = false; |
| 372 | private boolean refreshKrb5Config = false; |
| 373 | private boolean renewTGT = false; |
| 374 | |
| 375 | // specify if initiator. |
| 376 | // perform authentication exchange if initiator |
| 377 | private boolean isInitiator = true; |
| 378 | |
| 379 | // the authentication status |
| 380 | private boolean succeeded = false; |
| 381 | private boolean commitSucceeded = false; |
| 382 | private String username; |
| 383 | private EncryptionKey[] encKeys = null; |
| 384 | private Credentials cred = null; |
| 385 | |
| 386 | private PrincipalName principal = null; |
| 387 | private KerberosPrincipal kerbClientPrinc = null; |
| 388 | private KerberosTicket kerbTicket = null; |
| 389 | private KerberosKey[] kerbKeys = null; |
| 390 | private StringBuffer krb5PrincName = null; |
| 391 | private char[] password = null; |
| 392 | |
| 393 | private static final String NAME = "javax.security.auth.login.name"; |
| 394 | private static final String PWD = "javax.security.auth.login.password"; |
| 395 | static final java.util.ResourceBundle rb = |
| 396 | java.util.ResourceBundle.getBundle("sun.security.util.AuthResources"); |
| 397 | |
| 398 | /** |
| 399 | * Initialize this <code>LoginModule</code>. |
| 400 | * |
| 401 | * <p> |
| 402 | * @param subject the <code>Subject</code> to be authenticated. <p> |
| 403 | * |
| 404 | * @param callbackHandler a <code>CallbackHandler</code> for |
| 405 | * communication with the end user (prompting for |
| 406 | * usernames and passwords, for example). <p> |
| 407 | * |
| 408 | * @param sharedState shared <code>LoginModule</code> state. <p> |
| 409 | * |
| 410 | * @param options options specified in the login |
| 411 | * <code>Configuration</code> for this particular |
| 412 | * <code>LoginModule</code>. |
| 413 | */ |
| 414 | |
| 415 | public void initialize(Subject subject, |
| 416 | CallbackHandler callbackHandler, |
| 417 | Map<String, ?> sharedState, |
| 418 | Map<String, ?> options) { |
| 419 | |
| 420 | this.subject = subject; |
| 421 | this.callbackHandler = callbackHandler; |
| 422 | this.sharedState = sharedState; |
| 423 | this.options = options; |
| 424 | |
| 425 | // initialize any configured options |
| 426 | |
| 427 | debug = "true".equalsIgnoreCase((String)options.get("debug")); |
| 428 | storeKey = "true".equalsIgnoreCase((String)options.get("storeKey")); |
| 429 | doNotPrompt = "true".equalsIgnoreCase((String)options.get |
| 430 | ("doNotPrompt")); |
| 431 | useTicketCache = "true".equalsIgnoreCase((String)options.get |
| 432 | ("useTicketCache")); |
| 433 | useKeyTab = "true".equalsIgnoreCase((String)options.get("useKeyTab")); |
| 434 | ticketCacheName = (String)options.get("ticketCache"); |
| 435 | keyTabName = (String)options.get("keyTab"); |
| 436 | princName = (String)options.get("principal"); |
| 437 | refreshKrb5Config = |
| 438 | "true".equalsIgnoreCase((String)options.get("refreshKrb5Config")); |
| 439 | renewTGT = |
| 440 | "true".equalsIgnoreCase((String)options.get("renewTGT")); |
| 441 | |
| 442 | // check isInitiator value |
| 443 | String isInitiatorValue = ((String)options.get("isInitiator")); |
| 444 | if (isInitiatorValue == null) { |
| 445 | // use default, if value not set |
| 446 | } else { |
| 447 | isInitiator = "true".equalsIgnoreCase(isInitiatorValue); |
| 448 | } |
| 449 | |
| 450 | tryFirstPass = |
| 451 | "true".equalsIgnoreCase |
| 452 | ((String)options.get("tryFirstPass")); |
| 453 | useFirstPass = |
| 454 | "true".equalsIgnoreCase |
| 455 | ((String)options.get("useFirstPass")); |
| 456 | storePass = |
| 457 | "true".equalsIgnoreCase((String)options.get("storePass")); |
| 458 | clearPass = |
| 459 | "true".equalsIgnoreCase((String)options.get("clearPass")); |
| 460 | if (debug) { |
| 461 | System.out.print("Debug is " + debug |
| 462 | + " storeKey " + storeKey |
| 463 | + " useTicketCache " + useTicketCache |
| 464 | + " useKeyTab " + useKeyTab |
| 465 | + " doNotPrompt " + doNotPrompt |
| 466 | + " ticketCache is " + ticketCacheName |
| 467 | + " isInitiator " + isInitiator |
| 468 | + " KeyTab is " + keyTabName |
| 469 | + " refreshKrb5Config is " + refreshKrb5Config |
| 470 | + " principal is " + princName |
| 471 | + " tryFirstPass is " + tryFirstPass |
| 472 | + " useFirstPass is " + useFirstPass |
| 473 | + " storePass is " + storePass |
| 474 | + " clearPass is " + clearPass + "\n"); |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | |
| 479 | /** |
| 480 | * Authenticate the user |
| 481 | * |
| 482 | * <p> |
| 483 | * |
| 484 | * @return true in all cases since this <code>LoginModule</code> |
| 485 | * should not be ignored. |
| 486 | * |
| 487 | * @exception FailedLoginException if the authentication fails. <p> |
| 488 | * |
| 489 | * @exception LoginException if this <code>LoginModule</code> |
| 490 | * is unable to perform the authentication. |
| 491 | */ |
| 492 | public boolean login() throws LoginException { |
| 493 | |
| 494 | int len; |
| 495 | validateConfiguration(); |
| 496 | if (refreshKrb5Config) { |
| 497 | try { |
| 498 | if (debug) { |
| 499 | System.out.println("Refreshing Kerberos configuration"); |
| 500 | } |
| 501 | sun.security.krb5.Config.refresh(); |
| 502 | } catch (KrbException ke) { |
| 503 | LoginException le = new LoginException(ke.getMessage()); |
| 504 | le.initCause(ke); |
| 505 | throw le; |
| 506 | } |
| 507 | } |
| 508 | String principalProperty = System.getProperty |
| 509 | ("sun.security.krb5.principal"); |
| 510 | if (principalProperty != null) { |
| 511 | krb5PrincName = new StringBuffer(principalProperty); |
| 512 | } else { |
| 513 | if (princName != null) { |
| 514 | krb5PrincName = new StringBuffer(princName); |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | if (tryFirstPass) { |
| 519 | try { |
| 520 | attemptAuthentication(true); |
| 521 | if (debug) |
| 522 | System.out.println("\t\t[Krb5LoginModule] " + |
| 523 | "authentication succeeded"); |
| 524 | succeeded = true; |
| 525 | cleanState(); |
| 526 | return true; |
| 527 | } catch (LoginException le) { |
| 528 | // authentication failed -- try again below by prompting |
| 529 | cleanState(); |
| 530 | if (debug) { |
| 531 | System.out.println("\t\t[Krb5LoginModule] " + |
| 532 | "tryFirstPass failed with:" + |
| 533 | le.getMessage()); |
| 534 | } |
| 535 | } |
| 536 | } else if (useFirstPass) { |
| 537 | try { |
| 538 | attemptAuthentication(true); |
| 539 | succeeded = true; |
| 540 | cleanState(); |
| 541 | return true; |
| 542 | } catch (LoginException e) { |
| 543 | // authentication failed -- clean out state |
| 544 | if (debug) { |
| 545 | System.out.println("\t\t[Krb5LoginModule] " + |
| 546 | "authentication failed \n" + |
| 547 | e.getMessage()); |
| 548 | } |
| 549 | succeeded = false; |
| 550 | cleanState(); |
| 551 | throw e; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | // attempt the authentication by getting the username and pwd |
| 556 | // by prompting or configuration i.e. not from shared state |
| 557 | |
| 558 | try { |
| 559 | attemptAuthentication(false); |
| 560 | succeeded = true; |
| 561 | cleanState(); |
| 562 | return true; |
| 563 | } catch (LoginException e) { |
| 564 | // authentication failed -- clean out state |
| 565 | if (debug) { |
| 566 | System.out.println("\t\t[Krb5LoginModule] " + |
| 567 | "authentication failed \n" + |
| 568 | e.getMessage()); |
| 569 | } |
| 570 | succeeded = false; |
| 571 | cleanState(); |
| 572 | throw e; |
| 573 | } |
| 574 | } |
| 575 | /** |
| 576 | * process the configuration options |
| 577 | * Get the TGT either out of |
| 578 | * cache or from the KDC using the password entered |
| 579 | * Check the permission before getting the TGT |
| 580 | */ |
| 581 | |
| 582 | private void attemptAuthentication(boolean getPasswdFromSharedState) |
| 583 | throws LoginException { |
| 584 | |
| 585 | /* |
| 586 | * Check the creds cache to see whether |
| 587 | * we have TGT for this client principal |
| 588 | */ |
| 589 | if (krb5PrincName != null) { |
| 590 | try { |
| 591 | principal = new PrincipalName |
| 592 | (krb5PrincName.toString(), |
| 593 | PrincipalName.KRB_NT_PRINCIPAL); |
| 594 | } catch (KrbException e) { |
| 595 | LoginException le = new LoginException(e.getMessage()); |
| 596 | le.initCause(e); |
| 597 | throw le; |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | try { |
| 602 | if (useTicketCache) { |
| 603 | // ticketCacheName == null implies the default cache |
| 604 | if (debug) |
| 605 | System.out.println("Acquire TGT from Cache"); |
| 606 | cred = Credentials.acquireTGTFromCache |
| 607 | (principal, ticketCacheName); |
| 608 | |
| 609 | if (cred != null) { |
| 610 | // check to renew credentials |
| 611 | if (!isCurrent(cred)) { |
| 612 | if (renewTGT) { |
| 613 | cred = renewCredentials(cred); |
| 614 | } else { |
| 615 | // credentials have expired |
| 616 | cred = null; |
| 617 | if (debug) |
| 618 | System.out.println("Credentials are" + |
| 619 | " no longer valid"); |
| 620 | } |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | if (cred != null) { |
| 625 | // get the principal name from the ticket cache |
| 626 | if (principal == null) { |
| 627 | principal = cred.getClient(); |
| 628 | } |
| 629 | } |
| 630 | if (debug) { |
| 631 | System.out.println("Principal is " + principal); |
| 632 | if (cred == null) { |
| 633 | System.out.println |
| 634 | ("null credentials from Ticket Cache"); |
| 635 | } |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | // cred = null indicates that we didn't get the creds |
| 640 | // from the cache or useTicketCache was false |
| 641 | |
| 642 | if (cred == null) { |
| 643 | // We need the principal name whether we use keytab |
| 644 | // or AS Exchange |
| 645 | if (principal == null) { |
| 646 | promptForName(getPasswdFromSharedState); |
| 647 | principal = new PrincipalName |
| 648 | (krb5PrincName.toString(), |
| 649 | PrincipalName.KRB_NT_PRINCIPAL); |
| 650 | } |
| 651 | if (useKeyTab) { |
| 652 | encKeys = |
| 653 | EncryptionKey.acquireSecretKeys(principal, keyTabName); |
| 654 | |
| 655 | if (debug) { |
| 656 | if (encKeys != null) |
| 657 | System.out.println |
| 658 | ("principal's key obtained from the keytab"); |
| 659 | else |
| 660 | System.out.println |
| 661 | ("Key for the principal " + |
| 662 | principal + |
| 663 | " not available in " + |
| 664 | ((keyTabName == null) ? |
| 665 | "default key tab" : keyTabName)); |
| 666 | } |
| 667 | |
| 668 | } |
| 669 | // We can't get the key from the keytab so prompt |
| 670 | if (encKeys == null) { |
| 671 | promptForPass(getPasswdFromSharedState); |
| 672 | |
| 673 | encKeys = EncryptionKey.acquireSecretKeys( |
| 674 | password, principal.getSalt()); |
| 675 | |
| 676 | if (isInitiator) { |
| 677 | if (debug) |
| 678 | System.out.println("Acquire TGT using AS Exchange"); |
| 679 | cred = Credentials.acquireTGT(principal, |
| 680 | encKeys, password); |
| 681 | // update keys after pre-auth |
| 682 | encKeys = EncryptionKey.acquireSecretKeys(password, |
| 683 | principal.getSalt()); |
| 684 | } |
| 685 | } else { |
| 686 | if (isInitiator) { |
| 687 | if (debug) |
| 688 | System.out.println("Acquire TGT using AS Exchange"); |
| 689 | cred = Credentials.acquireTGT(principal, |
| 690 | encKeys, password); |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | // Get the TGT using AS Exchange |
| 695 | if (debug) { |
| 696 | System.out.println("principal is " + principal); |
| 697 | HexDumpEncoder hd = new HexDumpEncoder(); |
| 698 | for (int i = 0; i < encKeys.length; i++) { |
| 699 | System.out.println("EncryptionKey: keyType=" + |
| 700 | encKeys[i].getEType() + " keyBytes (hex dump)=" + |
| 701 | hd.encode(encKeys[i].getBytes())); |
| 702 | } |
| 703 | } |
| 704 | |
| 705 | // we should hava a non-null cred |
| 706 | if (isInitiator && (cred == null)) { |
| 707 | throw new LoginException |
| 708 | ("TGT Can not be obtained from the KDC "); |
| 709 | } |
| 710 | |
| 711 | } |
| 712 | } catch (KrbException e) { |
| 713 | LoginException le = new LoginException(e.getMessage()); |
| 714 | le.initCause(e); |
| 715 | throw le; |
| 716 | } catch (IOException ioe) { |
| 717 | LoginException ie = new LoginException(ioe.getMessage()); |
| 718 | ie.initCause(ioe); |
| 719 | throw ie; |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | private void promptForName(boolean getPasswdFromSharedState) |
| 724 | throws LoginException { |
| 725 | krb5PrincName = new StringBuffer(""); |
| 726 | if (getPasswdFromSharedState) { |
| 727 | // use the name saved by the first module in the stack |
| 728 | username = (String)sharedState.get(NAME); |
| 729 | if (debug) { |
| 730 | System.out.println |
| 731 | ("username from shared state is " + username + "\n"); |
| 732 | } |
| 733 | if (username == null) { |
| 734 | System.out.println |
| 735 | ("username from shared state is null\n"); |
| 736 | throw new LoginException |
| 737 | ("Username can not be obtained from sharedstate "); |
| 738 | } |
| 739 | if (debug) { |
| 740 | System.out.println |
| 741 | ("username from shared state is " + username + "\n"); |
| 742 | } |
| 743 | if (username != null && username.length() > 0) { |
| 744 | krb5PrincName.insert(0, username); |
| 745 | return; |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | if (doNotPrompt) { |
| 750 | throw new LoginException |
| 751 | ("Unable to obtain Princpal Name for authentication "); |
| 752 | } else { |
| 753 | if (callbackHandler == null) |
| 754 | throw new LoginException("No CallbackHandler " |
| 755 | + "available " |
| 756 | + "to garner authentication " |
| 757 | + "information from the user"); |
| 758 | try { |
| 759 | String defUsername = System.getProperty("user.name"); |
| 760 | |
| 761 | Callback[] callbacks = new Callback[1]; |
| 762 | MessageFormat form = new MessageFormat( |
| 763 | rb.getString( |
| 764 | "Kerberos username [[defUsername]]: ")); |
| 765 | Object[] source = {defUsername}; |
| 766 | callbacks[0] = new NameCallback(form.format(source)); |
| 767 | callbackHandler.handle(callbacks); |
| 768 | username = ((NameCallback)callbacks[0]).getName(); |
| 769 | if (username == null || username.length() == 0) |
| 770 | username = defUsername; |
| 771 | krb5PrincName.insert(0, username); |
| 772 | |
| 773 | } catch (java.io.IOException ioe) { |
| 774 | throw new LoginException(ioe.getMessage()); |
| 775 | } catch (UnsupportedCallbackException uce) { |
| 776 | throw new LoginException |
| 777 | (uce.getMessage() |
| 778 | +" not available to garner " |
| 779 | +" authentication information " |
| 780 | +" from the user"); |
| 781 | } |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | private void promptForPass(boolean getPasswdFromSharedState) |
| 786 | throws LoginException { |
| 787 | |
| 788 | if (getPasswdFromSharedState) { |
| 789 | // use the password saved by the first module in the stack |
| 790 | password = (char[])sharedState.get(PWD); |
| 791 | if (password == null) { |
| 792 | if (debug) { |
| 793 | System.out.println |
| 794 | ("Password from shared state is null"); |
| 795 | } |
| 796 | throw new LoginException |
| 797 | ("Password can not be obtained from sharedstate "); |
| 798 | } |
| 799 | if (debug) { |
| 800 | System.out.println |
| 801 | ("password is " + new String(password)); |
| 802 | } |
| 803 | return; |
| 804 | } |
| 805 | if (doNotPrompt) { |
| 806 | throw new LoginException |
| 807 | ("Unable to obtain password from user\n"); |
| 808 | } else { |
| 809 | if (callbackHandler == null) |
| 810 | throw new LoginException("No CallbackHandler " |
| 811 | + "available " |
| 812 | + "to garner authentication " |
| 813 | + "information from the user"); |
| 814 | try { |
| 815 | Callback[] callbacks = new Callback[1]; |
| 816 | String userName = krb5PrincName.toString(); |
| 817 | MessageFormat form = new MessageFormat( |
| 818 | rb.getString( |
| 819 | "Kerberos password for [username]: ")); |
| 820 | Object[] source = {userName}; |
| 821 | callbacks[0] = new PasswordCallback( |
| 822 | form.format(source), |
| 823 | false); |
| 824 | callbackHandler.handle(callbacks); |
| 825 | char[] tmpPassword = ((PasswordCallback) |
| 826 | callbacks[0]).getPassword(); |
| 827 | if (tmpPassword == null) { |
| 828 | // treat a NULL password as an empty password |
| 829 | tmpPassword = new char[0]; |
| 830 | } |
| 831 | password = new char[tmpPassword.length]; |
| 832 | System.arraycopy(tmpPassword, 0, |
| 833 | password, 0, tmpPassword.length); |
| 834 | ((PasswordCallback)callbacks[0]).clearPassword(); |
| 835 | |
| 836 | |
| 837 | // clear tmpPassword |
| 838 | for (int i = 0; i < tmpPassword.length; i++) |
| 839 | tmpPassword[i] = ' '; |
| 840 | tmpPassword = null; |
| 841 | if (debug) { |
| 842 | System.out.println("\t\t[Krb5LoginModule] " + |
| 843 | "user entered username: " + |
| 844 | krb5PrincName); |
| 845 | System.out.println(); |
| 846 | } |
| 847 | } catch (java.io.IOException ioe) { |
| 848 | throw new LoginException(ioe.getMessage()); |
| 849 | } catch (UnsupportedCallbackException uce) { |
| 850 | throw new LoginException(uce.getMessage() |
| 851 | +" not available to garner " |
| 852 | +" authentication information " |
| 853 | + "from the user"); |
| 854 | } |
| 855 | } |
| 856 | } |
| 857 | |
| 858 | private void validateConfiguration() throws LoginException { |
| 859 | if (doNotPrompt && !useTicketCache && !useKeyTab) |
| 860 | throw new LoginException |
| 861 | ("Configuration Error" |
| 862 | + " - either doNotPrompt should be " |
| 863 | + " false or useTicketCache/useKeyTab " |
| 864 | + " should be true"); |
| 865 | if (ticketCacheName != null && !useTicketCache) |
| 866 | throw new LoginException |
| 867 | ("Configuration Error " |
| 868 | + " - useTicketCache should be set " |
| 869 | + "to true to use the ticket cache" |
| 870 | + ticketCacheName); |
| 871 | if (keyTabName != null & !useKeyTab) |
| 872 | throw new LoginException |
| 873 | ("Configuration Error - useKeyTab should be set to true " |
| 874 | + "to use the keytab" + keyTabName); |
| 875 | if (storeKey && doNotPrompt && !useKeyTab) |
| 876 | throw new LoginException |
| 877 | ("Configuration Error - either doNotPrompt " |
| 878 | + "should be set to false or " |
| 879 | + "useKeyTab must be set to true for storeKey option"); |
| 880 | if (renewTGT && !useTicketCache) |
| 881 | throw new LoginException |
| 882 | ("Configuration Error" |
| 883 | + " - either useTicketCache should be " |
| 884 | + " true or renewTGT should be false"); |
| 885 | } |
| 886 | |
| 887 | private boolean isCurrent(Credentials creds) |
| 888 | { |
| 889 | Date endTime = creds.getEndTime(); |
| 890 | if (endTime != null) { |
| 891 | return (System.currentTimeMillis() <= endTime.getTime()); |
| 892 | } |
| 893 | return true; |
| 894 | } |
| 895 | |
| 896 | private Credentials renewCredentials(Credentials creds) |
| 897 | { |
| 898 | Credentials lcreds; |
| 899 | try { |
| 900 | if (!creds.isRenewable()) |
| 901 | throw new RefreshFailedException("This ticket" + |
| 902 | " is not renewable"); |
| 903 | if (System.currentTimeMillis() > cred.getRenewTill().getTime()) |
| 904 | throw new RefreshFailedException("This ticket is past " |
| 905 | + "its last renewal time."); |
| 906 | lcreds = creds.renew(); |
| 907 | if (debug) |
| 908 | System.out.println("Renewed Kerberos Ticket"); |
| 909 | } catch (Exception e) { |
| 910 | lcreds = null; |
| 911 | if (debug) |
| 912 | System.out.println("Ticket could not be renewed : " |
| 913 | + e.getMessage()); |
| 914 | } |
| 915 | return lcreds; |
| 916 | } |
| 917 | |
| 918 | /** |
| 919 | * <p> This method is called if the LoginContext's |
| 920 | * overall authentication succeeded |
| 921 | * (the relevant REQUIRED, REQUISITE, SUFFICIENT and OPTIONAL |
| 922 | * LoginModules succeeded). |
| 923 | * |
| 924 | * <p> If this LoginModule's own authentication attempt |
| 925 | * succeeded (checked by retrieving the private state saved by the |
| 926 | * <code>login</code> method), then this method associates a |
| 927 | * <code>Krb5Principal</code> |
| 928 | * with the <code>Subject</code> located in the |
| 929 | * <code>LoginModule</code>. It adds Kerberos Credentials to the |
| 930 | * the Subject's private credentials set. If this LoginModule's own |
| 931 | * authentication attempted failed, then this method removes |
| 932 | * any state that was originally saved. |
| 933 | * |
| 934 | * <p> |
| 935 | * |
| 936 | * @exception LoginException if the commit fails. |
| 937 | * |
| 938 | * @return true if this LoginModule's own login and commit |
| 939 | * attempts succeeded, or false otherwise. |
| 940 | */ |
| 941 | |
| 942 | public boolean commit() throws LoginException { |
| 943 | |
| 944 | /* |
| 945 | * Let us add the Krb5 Creds to the Subject's |
| 946 | * private credentials. The credentials are of type |
| 947 | * KerberosKey or KerberosTicket |
| 948 | */ |
| 949 | if (succeeded == false) { |
| 950 | return false; |
| 951 | } else { |
| 952 | |
| 953 | if (isInitiator && (cred == null)) { |
| 954 | succeeded = false; |
| 955 | throw new LoginException("Null Client Credential"); |
| 956 | } |
| 957 | |
| 958 | if (subject.isReadOnly()) { |
| 959 | cleanKerberosCred(); |
| 960 | throw new LoginException("Subject is Readonly"); |
| 961 | } |
| 962 | |
| 963 | /* |
| 964 | * Add the Principal (authenticated identity) |
| 965 | * to the Subject's principal set and |
| 966 | * add the credentials (TGT or Service key) to the |
| 967 | * Subject's private credentials |
| 968 | */ |
| 969 | |
| 970 | Set<Object> privCredSet = subject.getPrivateCredentials(); |
| 971 | Set<java.security.Principal> princSet = subject.getPrincipals(); |
| 972 | kerbClientPrinc = new KerberosPrincipal(principal.getName()); |
| 973 | |
| 974 | // create Kerberos Ticket |
| 975 | if (isInitiator) { |
| 976 | kerbTicket = Krb5Util.credsToTicket(cred); |
| 977 | } |
| 978 | |
| 979 | if (storeKey) { |
| 980 | if (encKeys == null || encKeys.length <= 0) { |
| 981 | succeeded = false; |
| 982 | throw new LoginException("Null Server Key "); |
| 983 | } |
| 984 | |
| 985 | kerbKeys = new KerberosKey[encKeys.length]; |
| 986 | for (int i = 0; i < encKeys.length; i ++) { |
| 987 | Integer temp = encKeys[i].getKeyVersionNumber(); |
| 988 | kerbKeys[i] = new KerberosKey(kerbClientPrinc, |
| 989 | encKeys[i].getBytes(), |
| 990 | encKeys[i].getEType(), |
| 991 | (temp == null? |
| 992 | 0: temp.intValue())); |
| 993 | } |
| 994 | |
| 995 | } |
| 996 | // Let us add the kerbClientPrinc,kerbTicket and kerbKey (if |
| 997 | // storeKey is true) |
| 998 | if (!princSet.contains(kerbClientPrinc)) |
| 999 | princSet.add(kerbClientPrinc); |
| 1000 | |
| 1001 | // add the TGT |
| 1002 | if (kerbTicket != null) { |
| 1003 | if (!privCredSet.contains(kerbTicket)) |
| 1004 | privCredSet.add(kerbTicket); |
| 1005 | } |
| 1006 | |
| 1007 | if (storeKey) { |
| 1008 | for (int i = 0; i < kerbKeys.length; i++) { |
| 1009 | if (!privCredSet.contains(kerbKeys[i])) { |
| 1010 | privCredSet.add(kerbKeys[i]); |
| 1011 | } |
| 1012 | encKeys[i].destroy(); |
| 1013 | encKeys[i] = null; |
| 1014 | if (debug) { |
| 1015 | System.out.println("Added server's key" |
| 1016 | + kerbKeys[i]); |
| 1017 | System.out.println("\t\t[Krb5LoginModule] " + |
| 1018 | "added Krb5Principal " + |
| 1019 | kerbClientPrinc.toString() |
| 1020 | + " to Subject"); |
| 1021 | } |
| 1022 | } |
| 1023 | } |
| 1024 | } |
| 1025 | commitSucceeded = true; |
| 1026 | if (debug) |
| 1027 | System.out.println("Commit Succeeded \n"); |
| 1028 | return true; |
| 1029 | } |
| 1030 | |
| 1031 | /** |
| 1032 | * <p> This method is called if the LoginContext's |
| 1033 | * overall authentication failed. |
| 1034 | * (the relevant REQUIRED, REQUISITE, SUFFICIENT and OPTIONAL |
| 1035 | * LoginModules did not succeed). |
| 1036 | * |
| 1037 | * <p> If this LoginModule's own authentication attempt |
| 1038 | * succeeded (checked by retrieving the private state saved by the |
| 1039 | * <code>login</code> and <code>commit</code> methods), |
| 1040 | * then this method cleans up any state that was originally saved. |
| 1041 | * |
| 1042 | * <p> |
| 1043 | * |
| 1044 | * @exception LoginException if the abort fails. |
| 1045 | * |
| 1046 | * @return false if this LoginModule's own login and/or commit attempts |
| 1047 | * failed, and true otherwise. |
| 1048 | */ |
| 1049 | |
| 1050 | public boolean abort() throws LoginException { |
| 1051 | if (succeeded == false) { |
| 1052 | return false; |
| 1053 | } else if (succeeded == true && commitSucceeded == false) { |
| 1054 | // login succeeded but overall authentication failed |
| 1055 | succeeded = false; |
| 1056 | cleanKerberosCred(); |
| 1057 | } else { |
| 1058 | // overall authentication succeeded and commit succeeded, |
| 1059 | // but someone else's commit failed |
| 1060 | logout(); |
| 1061 | } |
| 1062 | return true; |
| 1063 | } |
| 1064 | |
| 1065 | /** |
| 1066 | * Logout the user. |
| 1067 | * |
| 1068 | * <p> This method removes the <code>Krb5Principal</code> |
| 1069 | * that was added by the <code>commit</code> method. |
| 1070 | * |
| 1071 | * <p> |
| 1072 | * |
| 1073 | * @exception LoginException if the logout fails. |
| 1074 | * |
| 1075 | * @return true in all cases since this <code>LoginModule</code> |
| 1076 | * should not be ignored. |
| 1077 | */ |
| 1078 | public boolean logout() throws LoginException { |
| 1079 | |
| 1080 | if (debug) { |
| 1081 | System.out.println("\t\t[Krb5LoginModule]: " + |
| 1082 | "Entering logout"); |
| 1083 | } |
| 1084 | |
| 1085 | if (subject.isReadOnly()) { |
| 1086 | cleanKerberosCred(); |
| 1087 | throw new LoginException("Subject is Readonly"); |
| 1088 | } |
| 1089 | |
| 1090 | subject.getPrincipals().remove(kerbClientPrinc); |
| 1091 | // Let us remove all Kerberos credentials stored in the Subject |
| 1092 | Iterator<Object> it = subject.getPrivateCredentials().iterator(); |
| 1093 | while (it.hasNext()) { |
| 1094 | Object o = it.next(); |
| 1095 | if (o instanceof KerberosTicket || |
| 1096 | o instanceof KerberosKey) { |
| 1097 | it.remove(); |
| 1098 | } |
| 1099 | } |
| 1100 | // clean the kerberos ticket and keys |
| 1101 | cleanKerberosCred(); |
| 1102 | |
| 1103 | succeeded = false; |
| 1104 | commitSucceeded = false; |
| 1105 | if (debug) { |
| 1106 | System.out.println("\t\t[Krb5LoginModule]: " + |
| 1107 | "logged out Subject"); |
| 1108 | } |
| 1109 | return true; |
| 1110 | } |
| 1111 | |
| 1112 | /** |
| 1113 | * Clean Kerberos credentials |
| 1114 | */ |
| 1115 | private void cleanKerberosCred() throws LoginException { |
| 1116 | // Clean the ticket and server key |
| 1117 | try { |
| 1118 | if (kerbTicket != null) |
| 1119 | kerbTicket.destroy(); |
| 1120 | if (kerbKeys != null) { |
| 1121 | for (int i = 0; i < kerbKeys.length; i++) { |
| 1122 | kerbKeys[i].destroy(); |
| 1123 | } |
| 1124 | } |
| 1125 | } catch (DestroyFailedException e) { |
| 1126 | throw new LoginException |
| 1127 | ("Destroy Failed on Kerberos Private Credentials"); |
| 1128 | } |
| 1129 | kerbTicket = null; |
| 1130 | kerbKeys = null; |
| 1131 | kerbClientPrinc = null; |
| 1132 | } |
| 1133 | |
| 1134 | /** |
| 1135 | * Clean out the state |
| 1136 | */ |
| 1137 | private void cleanState() { |
| 1138 | |
| 1139 | // save input as shared state only if |
| 1140 | // authentication succeeded |
| 1141 | if (succeeded) { |
| 1142 | if (storePass && |
| 1143 | !sharedState.containsKey(NAME) && |
| 1144 | !sharedState.containsKey(PWD)) { |
| 1145 | sharedState.put(NAME, username); |
| 1146 | sharedState.put(PWD, password); |
| 1147 | } |
| 1148 | } |
| 1149 | username = null; |
| 1150 | password = null; |
| 1151 | if (krb5PrincName != null && krb5PrincName.length() != 0) |
| 1152 | krb5PrincName.delete(0, krb5PrincName.length()); |
| 1153 | krb5PrincName = null; |
| 1154 | if (clearPass) { |
| 1155 | sharedState.remove(NAME); |
| 1156 | sharedState.remove(PWD); |
| 1157 | } |
| 1158 | } |
| 1159 | } |