Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 1 | /* |
Sergio Giro | 1798254 | 2016-08-03 19:21:52 +0100 | [diff] [blame] | 2 | * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 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. Oracle designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 22 | * or visit www.oracle.com if you need additional information or have any |
| 23 | * questions. |
| 24 | */ |
| 25 | |
| 26 | package javax.crypto; |
| 27 | |
| 28 | import java.util.*; |
| 29 | |
| 30 | import java.security.*; |
| 31 | import java.security.Provider.Service; |
| 32 | import java.security.spec.*; |
| 33 | |
| 34 | import sun.security.jca.*; |
| 35 | import sun.security.jca.GetInstance.Instance; |
| 36 | |
| 37 | /** |
| 38 | * This class provides the functionality of a secret (symmetric) key generator. |
| 39 | * |
| 40 | * <p>Key generators are constructed using one of the <code>getInstance</code> |
| 41 | * class methods of this class. |
| 42 | * |
| 43 | * <p>KeyGenerator objects are reusable, i.e., after a key has been |
| 44 | * generated, the same KeyGenerator object can be re-used to generate further |
| 45 | * keys. |
| 46 | * |
| 47 | * <p>There are two ways to generate a key: in an algorithm-independent |
| 48 | * manner, and in an algorithm-specific manner. |
| 49 | * The only difference between the two is the initialization of the object: |
| 50 | * |
| 51 | * <ul> |
| 52 | * <li><b>Algorithm-Independent Initialization</b> |
| 53 | * <p>All key generators share the concepts of a <i>keysize</i> and a |
| 54 | * <i>source of randomness</i>. |
| 55 | * There is an |
| 56 | * {@link #init(int, java.security.SecureRandom) init} |
| 57 | * method in this KeyGenerator class that takes these two universally |
| 58 | * shared types of arguments. There is also one that takes just a |
| 59 | * <code>keysize</code> argument, and uses the SecureRandom implementation |
| 60 | * of the highest-priority installed provider as the source of randomness |
| 61 | * (or a system-provided source of randomness if none of the installed |
| 62 | * providers supply a SecureRandom implementation), and one that takes just a |
| 63 | * source of randomness. |
| 64 | * |
| 65 | * <p>Since no other parameters are specified when you call the above |
| 66 | * algorithm-independent <code>init</code> methods, it is up to the |
| 67 | * provider what to do about the algorithm-specific parameters (if any) to be |
| 68 | * associated with each of the keys. |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 69 | * |
| 70 | * <li><b>Algorithm-Specific Initialization</b> |
| 71 | * <p>For situations where a set of algorithm-specific parameters already |
| 72 | * exists, there are two |
| 73 | * {@link #init(java.security.spec.AlgorithmParameterSpec) init} |
| 74 | * methods that have an <code>AlgorithmParameterSpec</code> |
| 75 | * argument. One also has a <code>SecureRandom</code> argument, while the |
| 76 | * other uses the SecureRandom implementation |
| 77 | * of the highest-priority installed provider as the source of randomness |
| 78 | * (or a system-provided source of randomness if none of the installed |
| 79 | * providers supply a SecureRandom implementation). |
| 80 | * </ul> |
| 81 | * |
| 82 | * <p>In case the client does not explicitly initialize the KeyGenerator |
| 83 | * (via a call to an <code>init</code> method), each provider must |
| 84 | * supply (and document) a default initialization. |
| 85 | * |
Przemyslaw Szczepaniak | 444325b | 2016-05-18 13:09:39 +0100 | [diff] [blame] | 86 | * <p> Android provides the following <code>KeyGenerator</code> algorithms: |
| 87 | * <table> |
Adam Vartanian | a52aa9f | 2017-03-20 11:32:38 +0000 | [diff] [blame] | 88 | * <thead> |
| 89 | * <tr> |
| 90 | * <th>Algorithm</th> |
| 91 | * <th>Supported API Levels</th> |
| 92 | * </tr> |
| 93 | * </thead> |
| 94 | * <tbody> |
| 95 | * <tr> |
| 96 | * <td>AES</td> |
| 97 | * <td>1+</td> |
| 98 | * </tr> |
| 99 | * <tr class="deprecated"> |
| 100 | * <td>AESWRAP</td> |
| 101 | * <td>1-8</td> |
| 102 | * </tr> |
| 103 | * <tr> |
| 104 | * <td>ARC4</td> |
| 105 | * <td>14+</td> |
| 106 | * </tr> |
| 107 | * <tr> |
| 108 | * <td>BLOWFISH</td> |
| 109 | * <td>10+</td> |
| 110 | * </tr> |
| 111 | * <tr> |
Adam Vartanian | 6b6741f | 2018-01-03 14:44:12 +0000 | [diff] [blame] | 112 | * <td>ChaCha20</td> |
| 113 | * <td>28+</td> |
| 114 | * </tr> |
| 115 | * <tr> |
Adam Vartanian | a52aa9f | 2017-03-20 11:32:38 +0000 | [diff] [blame] | 116 | * <td>DES</td> |
| 117 | * <td>1+</td> |
| 118 | * </tr> |
| 119 | * <tr> |
| 120 | * <td>DESede</td> |
| 121 | * <td>1+</td> |
| 122 | * </tr> |
| 123 | * <tr class="deprecated"> |
| 124 | * <td>DESedeWRAP</td> |
| 125 | * <td>1-8</td> |
| 126 | * </tr> |
| 127 | * <tr> |
| 128 | * <td>HmacMD5</td> |
| 129 | * <td>1+</td> |
| 130 | * </tr> |
| 131 | * <tr> |
| 132 | * <td>HmacSHA1</td> |
| 133 | * <td>11+</td> |
| 134 | * </tr> |
| 135 | * <tr> |
| 136 | * <td>HmacSHA224</td> |
| 137 | * <td>1-8,22+</td> |
| 138 | * </tr> |
| 139 | * <tr> |
| 140 | * <td>HmacSHA256</td> |
| 141 | * <td>1+</td> |
| 142 | * </tr> |
| 143 | * <tr> |
| 144 | * <td>HmacSHA384</td> |
| 145 | * <td>1+</td> |
| 146 | * </tr> |
| 147 | * <tr> |
| 148 | * <td>HmacSHA512</td> |
| 149 | * <td>1+</td> |
| 150 | * </tr> |
| 151 | * <tr class="deprecated"> |
| 152 | * <td>RC4</td> |
| 153 | * <td>10-13</td> |
| 154 | * </tr> |
| 155 | * </tbody> |
Przemyslaw Szczepaniak | 444325b | 2016-05-18 13:09:39 +0100 | [diff] [blame] | 156 | * </table> |
| 157 | * |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 158 | * These algorithms are described in the <a href= |
Tobias Thierer | 6bd07db | 2019-04-03 18:06:18 +0100 | [diff] [blame] | 159 | * "{@docRoot}/../technotes/guides/security/StandardNames.html#KeyGenerator"> |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 160 | * KeyGenerator section</a> of the |
| 161 | * Java Cryptography Architecture Standard Algorithm Name Documentation. |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 162 | * |
| 163 | * @author Jan Luehe |
| 164 | * |
| 165 | * @see SecretKey |
| 166 | * @since 1.4 |
| 167 | */ |
| 168 | |
| 169 | public class KeyGenerator { |
| 170 | |
Tobias Thierer | 9eca269 | 2017-04-12 18:16:06 +0100 | [diff] [blame] | 171 | // Android-removed: this debugging mechanism is not used in Android. |
| 172 | /* |
Sergio Giro | 1798254 | 2016-08-03 19:21:52 +0100 | [diff] [blame] | 173 | private static final Debug pdebug = |
| 174 | Debug.getInstance("provider", "Provider"); |
| 175 | private static final boolean skipDebug = |
| 176 | Debug.isOn("engine=") && !Debug.isOn("keygenerator"); |
| 177 | */ |
| 178 | |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 179 | // see java.security.KeyPairGenerator for failover notes |
| 180 | |
| 181 | private final static int I_NONE = 1; |
| 182 | private final static int I_RANDOM = 2; |
| 183 | private final static int I_PARAMS = 3; |
| 184 | private final static int I_SIZE = 4; |
| 185 | |
| 186 | // The provider |
| 187 | private Provider provider; |
| 188 | |
| 189 | // The provider implementation (delegate) |
| 190 | private volatile KeyGeneratorSpi spi; |
| 191 | |
| 192 | // The algorithm |
| 193 | private final String algorithm; |
| 194 | |
| 195 | private final Object lock = new Object(); |
| 196 | |
Sergio Giro | 1798254 | 2016-08-03 19:21:52 +0100 | [diff] [blame] | 197 | private Iterator<Service> serviceIterator; |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 198 | |
| 199 | private int initType; |
| 200 | private int initKeySize; |
| 201 | private AlgorithmParameterSpec initParams; |
| 202 | private SecureRandom initRandom; |
| 203 | |
| 204 | /** |
| 205 | * Creates a KeyGenerator object. |
| 206 | * |
| 207 | * @param keyGenSpi the delegate |
| 208 | * @param provider the provider |
| 209 | * @param algorithm the algorithm |
| 210 | */ |
| 211 | protected KeyGenerator(KeyGeneratorSpi keyGenSpi, Provider provider, |
| 212 | String algorithm) { |
| 213 | this.spi = keyGenSpi; |
| 214 | this.provider = provider; |
| 215 | this.algorithm = algorithm; |
Sergio Giro | 1798254 | 2016-08-03 19:21:52 +0100 | [diff] [blame] | 216 | |
Tobias Thierer | 9eca269 | 2017-04-12 18:16:06 +0100 | [diff] [blame] | 217 | // Android-removed: this debugging mechanism is not used in Android. |
| 218 | /* |
Sergio Giro | 1798254 | 2016-08-03 19:21:52 +0100 | [diff] [blame] | 219 | if (!skipDebug && pdebug != null) { |
| 220 | pdebug.println("KeyGenerator." + algorithm + " algorithm from: " + |
| 221 | this.provider.getName()); |
| 222 | } |
| 223 | */ |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | private KeyGenerator(String algorithm) throws NoSuchAlgorithmException { |
| 227 | this.algorithm = algorithm; |
Sergio Giro | 1798254 | 2016-08-03 19:21:52 +0100 | [diff] [blame] | 228 | List<Service> list = |
| 229 | GetInstance.getServices("KeyGenerator", algorithm); |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 230 | serviceIterator = list.iterator(); |
| 231 | initType = I_NONE; |
| 232 | // fetch and instantiate initial spi |
| 233 | if (nextSpi(null, false) == null) { |
| 234 | throw new NoSuchAlgorithmException |
| 235 | (algorithm + " KeyGenerator not available"); |
| 236 | } |
Sergio Giro | 1798254 | 2016-08-03 19:21:52 +0100 | [diff] [blame] | 237 | |
Tobias Thierer | 9eca269 | 2017-04-12 18:16:06 +0100 | [diff] [blame] | 238 | // Android-removed: this debugging mechanism is not used in Android. |
| 239 | /* |
Sergio Giro | 1798254 | 2016-08-03 19:21:52 +0100 | [diff] [blame] | 240 | if (!skipDebug && pdebug != null) { |
| 241 | pdebug.println("KeyGenerator." + algorithm + " algorithm from: " + |
| 242 | this.provider.getName()); |
| 243 | } |
| 244 | */ |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | /** |
| 248 | * Returns the algorithm name of this <code>KeyGenerator</code> object. |
| 249 | * |
| 250 | * <p>This is the same name that was specified in one of the |
| 251 | * <code>getInstance</code> calls that created this |
| 252 | * <code>KeyGenerator</code> object. |
| 253 | * |
| 254 | * @return the algorithm name of this <code>KeyGenerator</code> object. |
| 255 | */ |
| 256 | public final String getAlgorithm() { |
| 257 | return this.algorithm; |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * Returns a <code>KeyGenerator</code> object that generates secret keys |
| 262 | * for the specified algorithm. |
| 263 | * |
| 264 | * <p> This method traverses the list of registered security Providers, |
| 265 | * starting with the most preferred Provider. |
| 266 | * A new KeyGenerator object encapsulating the |
| 267 | * KeyGeneratorSpi implementation from the first |
| 268 | * Provider that supports the specified algorithm is returned. |
| 269 | * |
| 270 | * <p> Note that the list of registered providers may be retrieved via |
| 271 | * the {@link Security#getProviders() Security.getProviders()} method. |
| 272 | * |
| 273 | * @param algorithm the standard name of the requested key algorithm. |
| 274 | * See the KeyGenerator section in the <a href= |
Tobias Thierer | 6bd07db | 2019-04-03 18:06:18 +0100 | [diff] [blame] | 275 | * "{@docRoot}/../technotes/guides/security/StandardNames.html#KeyGenerator"> |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 276 | * Java Cryptography Architecture Standard Algorithm Name Documentation</a> |
| 277 | * for information about standard algorithm names. |
| 278 | * |
| 279 | * @return the new <code>KeyGenerator</code> object. |
| 280 | * |
| 281 | * @exception NullPointerException if the specified algorithm is null. |
| 282 | * |
| 283 | * @exception NoSuchAlgorithmException if no Provider supports a |
| 284 | * KeyGeneratorSpi implementation for the |
| 285 | * specified algorithm. |
| 286 | * |
| 287 | * @see java.security.Provider |
| 288 | */ |
| 289 | public static final KeyGenerator getInstance(String algorithm) |
| 290 | throws NoSuchAlgorithmException { |
| 291 | return new KeyGenerator(algorithm); |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * Returns a <code>KeyGenerator</code> object that generates secret keys |
| 296 | * for the specified algorithm. |
| 297 | * |
| 298 | * <p> A new KeyGenerator object encapsulating the |
| 299 | * KeyGeneratorSpi implementation from the specified provider |
| 300 | * is returned. The specified provider must be registered |
| 301 | * in the security provider list. |
| 302 | * |
| 303 | * <p> Note that the list of registered providers may be retrieved via |
| 304 | * the {@link Security#getProviders() Security.getProviders()} method. |
| 305 | * |
| 306 | * @param algorithm the standard name of the requested key algorithm. |
| 307 | * See the KeyGenerator section in the <a href= |
Tobias Thierer | 6bd07db | 2019-04-03 18:06:18 +0100 | [diff] [blame] | 308 | * "{@docRoot}/../technotes/guides/security/StandardNames.html#KeyGenerator"> |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 309 | * Java Cryptography Architecture Standard Algorithm Name Documentation</a> |
| 310 | * for information about standard algorithm names. |
| 311 | * |
| 312 | * @param provider the name of the provider. |
| 313 | * |
| 314 | * @return the new <code>KeyGenerator</code> object. |
| 315 | * |
| 316 | * @exception NullPointerException if the specified algorithm is null. |
| 317 | * |
| 318 | * @exception NoSuchAlgorithmException if a KeyGeneratorSpi |
| 319 | * implementation for the specified algorithm is not |
| 320 | * available from the specified provider. |
| 321 | * |
| 322 | * @exception NoSuchProviderException if the specified provider is not |
| 323 | * registered in the security provider list. |
| 324 | * |
| 325 | * @exception IllegalArgumentException if the <code>provider</code> |
| 326 | * is null or empty. |
| 327 | * |
| 328 | * @see java.security.Provider |
| 329 | */ |
| 330 | public static final KeyGenerator getInstance(String algorithm, |
| 331 | String provider) throws NoSuchAlgorithmException, |
| 332 | NoSuchProviderException { |
Adam Vartanian | 491d888 | 2017-10-10 11:43:32 +0100 | [diff] [blame] | 333 | // Android-added: Check for Bouncy Castle deprecation |
| 334 | Providers.checkBouncyCastleDeprecation(provider, "KeyGenerator", algorithm); |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 335 | Instance instance = JceSecurity.getInstance("KeyGenerator", |
| 336 | KeyGeneratorSpi.class, algorithm, provider); |
| 337 | return new KeyGenerator((KeyGeneratorSpi)instance.impl, |
| 338 | instance.provider, algorithm); |
| 339 | } |
| 340 | |
| 341 | /** |
| 342 | * Returns a <code>KeyGenerator</code> object that generates secret keys |
| 343 | * for the specified algorithm. |
| 344 | * |
| 345 | * <p> A new KeyGenerator object encapsulating the |
| 346 | * KeyGeneratorSpi implementation from the specified Provider |
| 347 | * object is returned. Note that the specified Provider object |
| 348 | * does not have to be registered in the provider list. |
| 349 | * |
| 350 | * @param algorithm the standard name of the requested key algorithm. |
| 351 | * See the KeyGenerator section in the <a href= |
Tobias Thierer | 6bd07db | 2019-04-03 18:06:18 +0100 | [diff] [blame] | 352 | * "{@docRoot}/../technotes/guides/security/StandardNames.html#KeyGenerator"> |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 353 | * Java Cryptography Architecture Standard Algorithm Name Documentation</a> |
| 354 | * for information about standard algorithm names. |
| 355 | * |
| 356 | * @param provider the provider. |
| 357 | * |
| 358 | * @return the new <code>KeyGenerator</code> object. |
| 359 | * |
| 360 | * @exception NullPointerException if the specified algorithm is null. |
| 361 | * |
| 362 | * @exception NoSuchAlgorithmException if a KeyGeneratorSpi |
| 363 | * implementation for the specified algorithm is not available |
| 364 | * from the specified Provider object. |
| 365 | * |
| 366 | * @exception IllegalArgumentException if the <code>provider</code> |
| 367 | * is null. |
| 368 | * |
| 369 | * @see java.security.Provider |
| 370 | */ |
| 371 | public static final KeyGenerator getInstance(String algorithm, |
| 372 | Provider provider) throws NoSuchAlgorithmException { |
Adam Vartanian | 491d888 | 2017-10-10 11:43:32 +0100 | [diff] [blame] | 373 | // Android-added: Check for Bouncy Castle deprecation |
| 374 | Providers.checkBouncyCastleDeprecation(provider, "KeyGenerator", algorithm); |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 375 | Instance instance = JceSecurity.getInstance("KeyGenerator", |
| 376 | KeyGeneratorSpi.class, algorithm, provider); |
| 377 | return new KeyGenerator((KeyGeneratorSpi)instance.impl, |
| 378 | instance.provider, algorithm); |
| 379 | } |
| 380 | |
| 381 | /** |
| 382 | * Returns the provider of this <code>KeyGenerator</code> object. |
| 383 | * |
| 384 | * @return the provider of this <code>KeyGenerator</code> object |
| 385 | */ |
| 386 | public final Provider getProvider() { |
| 387 | synchronized (lock) { |
| 388 | disableFailover(); |
| 389 | return provider; |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | /** |
| 394 | * Update the active spi of this class and return the next |
| 395 | * implementation for failover. If no more implemenations are |
| 396 | * available, this method returns null. However, the active spi of |
| 397 | * this class is never set to null. |
| 398 | */ |
| 399 | private KeyGeneratorSpi nextSpi(KeyGeneratorSpi oldSpi, |
| 400 | boolean reinit) { |
| 401 | synchronized (lock) { |
| 402 | // somebody else did a failover concurrently |
| 403 | // try that spi now |
| 404 | if ((oldSpi != null) && (oldSpi != spi)) { |
| 405 | return spi; |
| 406 | } |
| 407 | if (serviceIterator == null) { |
| 408 | return null; |
| 409 | } |
| 410 | while (serviceIterator.hasNext()) { |
Sergio Giro | 1798254 | 2016-08-03 19:21:52 +0100 | [diff] [blame] | 411 | Service s = serviceIterator.next(); |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 412 | if (JceSecurity.canUseProvider(s.getProvider()) == false) { |
| 413 | continue; |
| 414 | } |
| 415 | try { |
| 416 | Object inst = s.newInstance(null); |
| 417 | // ignore non-spis |
| 418 | if (inst instanceof KeyGeneratorSpi == false) { |
| 419 | continue; |
| 420 | } |
| 421 | KeyGeneratorSpi spi = (KeyGeneratorSpi)inst; |
| 422 | if (reinit) { |
| 423 | if (initType == I_SIZE) { |
| 424 | spi.engineInit(initKeySize, initRandom); |
| 425 | } else if (initType == I_PARAMS) { |
| 426 | spi.engineInit(initParams, initRandom); |
| 427 | } else if (initType == I_RANDOM) { |
| 428 | spi.engineInit(initRandom); |
| 429 | } else if (initType != I_NONE) { |
| 430 | throw new AssertionError |
| 431 | ("KeyGenerator initType: " + initType); |
| 432 | } |
| 433 | } |
| 434 | provider = s.getProvider(); |
| 435 | this.spi = spi; |
| 436 | return spi; |
| 437 | } catch (Exception e) { |
| 438 | // ignore |
| 439 | } |
| 440 | } |
| 441 | disableFailover(); |
| 442 | return null; |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | void disableFailover() { |
| 447 | serviceIterator = null; |
| 448 | initType = 0; |
| 449 | initParams = null; |
| 450 | initRandom = null; |
| 451 | } |
| 452 | |
| 453 | /** |
| 454 | * Initializes this key generator. |
| 455 | * |
| 456 | * @param random the source of randomness for this generator |
| 457 | */ |
| 458 | public final void init(SecureRandom random) { |
| 459 | if (serviceIterator == null) { |
| 460 | spi.engineInit(random); |
| 461 | return; |
| 462 | } |
| 463 | RuntimeException failure = null; |
| 464 | KeyGeneratorSpi mySpi = spi; |
| 465 | do { |
| 466 | try { |
| 467 | mySpi.engineInit(random); |
| 468 | initType = I_RANDOM; |
| 469 | initKeySize = 0; |
| 470 | initParams = null; |
| 471 | initRandom = random; |
| 472 | return; |
| 473 | } catch (RuntimeException e) { |
| 474 | if (failure == null) { |
| 475 | failure = e; |
| 476 | } |
| 477 | mySpi = nextSpi(mySpi, false); |
| 478 | } |
| 479 | } while (mySpi != null); |
| 480 | throw failure; |
| 481 | } |
| 482 | |
| 483 | /** |
| 484 | * Initializes this key generator with the specified parameter set. |
| 485 | * |
| 486 | * <p> If this key generator requires any random bytes, it will get them |
| 487 | * using the |
Sergio Giro | 1798254 | 2016-08-03 19:21:52 +0100 | [diff] [blame] | 488 | * {@link java.security.SecureRandom} |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 489 | * implementation of the highest-priority installed |
| 490 | * provider as the source of randomness. |
| 491 | * (If none of the installed providers supply an implementation of |
| 492 | * SecureRandom, a system-provided source of randomness will be used.) |
| 493 | * |
| 494 | * @param params the key generation parameters |
| 495 | * |
| 496 | * @exception InvalidAlgorithmParameterException if the given parameters |
| 497 | * are inappropriate for this key generator |
| 498 | */ |
| 499 | public final void init(AlgorithmParameterSpec params) |
| 500 | throws InvalidAlgorithmParameterException |
| 501 | { |
| 502 | init(params, JceSecurity.RANDOM); |
| 503 | } |
| 504 | |
| 505 | /** |
| 506 | * Initializes this key generator with the specified parameter |
| 507 | * set and a user-provided source of randomness. |
| 508 | * |
| 509 | * @param params the key generation parameters |
| 510 | * @param random the source of randomness for this key generator |
| 511 | * |
| 512 | * @exception InvalidAlgorithmParameterException if <code>params</code> is |
| 513 | * inappropriate for this key generator |
| 514 | */ |
| 515 | public final void init(AlgorithmParameterSpec params, SecureRandom random) |
| 516 | throws InvalidAlgorithmParameterException |
| 517 | { |
| 518 | if (serviceIterator == null) { |
| 519 | spi.engineInit(params, random); |
| 520 | return; |
| 521 | } |
| 522 | Exception failure = null; |
| 523 | KeyGeneratorSpi mySpi = spi; |
| 524 | do { |
| 525 | try { |
| 526 | mySpi.engineInit(params, random); |
| 527 | initType = I_PARAMS; |
| 528 | initKeySize = 0; |
| 529 | initParams = params; |
| 530 | initRandom = random; |
| 531 | return; |
| 532 | } catch (Exception e) { |
| 533 | if (failure == null) { |
| 534 | failure = e; |
| 535 | } |
| 536 | mySpi = nextSpi(mySpi, false); |
| 537 | } |
| 538 | } while (mySpi != null); |
| 539 | if (failure instanceof InvalidAlgorithmParameterException) { |
| 540 | throw (InvalidAlgorithmParameterException)failure; |
| 541 | } |
| 542 | if (failure instanceof RuntimeException) { |
| 543 | throw (RuntimeException)failure; |
| 544 | } |
| 545 | throw new InvalidAlgorithmParameterException("init() failed", failure); |
| 546 | } |
| 547 | |
| 548 | /** |
| 549 | * Initializes this key generator for a certain keysize. |
| 550 | * |
| 551 | * <p> If this key generator requires any random bytes, it will get them |
| 552 | * using the |
Sergio Giro | 1798254 | 2016-08-03 19:21:52 +0100 | [diff] [blame] | 553 | * {@link java.security.SecureRandom} |
Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame] | 554 | * implementation of the highest-priority installed |
| 555 | * provider as the source of randomness. |
| 556 | * (If none of the installed providers supply an implementation of |
| 557 | * SecureRandom, a system-provided source of randomness will be used.) |
| 558 | * |
| 559 | * @param keysize the keysize. This is an algorithm-specific metric, |
| 560 | * specified in number of bits. |
| 561 | * |
| 562 | * @exception InvalidParameterException if the keysize is wrong or not |
| 563 | * supported. |
| 564 | */ |
| 565 | public final void init(int keysize) { |
| 566 | init(keysize, JceSecurity.RANDOM); |
| 567 | } |
| 568 | |
| 569 | /** |
| 570 | * Initializes this key generator for a certain keysize, using a |
| 571 | * user-provided source of randomness. |
| 572 | * |
| 573 | * @param keysize the keysize. This is an algorithm-specific metric, |
| 574 | * specified in number of bits. |
| 575 | * @param random the source of randomness for this key generator |
| 576 | * |
| 577 | * @exception InvalidParameterException if the keysize is wrong or not |
| 578 | * supported. |
| 579 | */ |
| 580 | public final void init(int keysize, SecureRandom random) { |
| 581 | if (serviceIterator == null) { |
| 582 | spi.engineInit(keysize, random); |
| 583 | return; |
| 584 | } |
| 585 | RuntimeException failure = null; |
| 586 | KeyGeneratorSpi mySpi = spi; |
| 587 | do { |
| 588 | try { |
| 589 | mySpi.engineInit(keysize, random); |
| 590 | initType = I_SIZE; |
| 591 | initKeySize = keysize; |
| 592 | initParams = null; |
| 593 | initRandom = random; |
| 594 | return; |
| 595 | } catch (RuntimeException e) { |
| 596 | if (failure == null) { |
| 597 | failure = e; |
| 598 | } |
| 599 | mySpi = nextSpi(mySpi, false); |
| 600 | } |
| 601 | } while (mySpi != null); |
| 602 | throw failure; |
| 603 | } |
| 604 | |
| 605 | /** |
| 606 | * Generates a secret key. |
| 607 | * |
| 608 | * @return the new key |
| 609 | */ |
| 610 | public final SecretKey generateKey() { |
| 611 | if (serviceIterator == null) { |
| 612 | return spi.engineGenerateKey(); |
| 613 | } |
| 614 | RuntimeException failure = null; |
| 615 | KeyGeneratorSpi mySpi = spi; |
| 616 | do { |
| 617 | try { |
| 618 | return mySpi.engineGenerateKey(); |
| 619 | } catch (RuntimeException e) { |
| 620 | if (failure == null) { |
| 621 | failure = e; |
| 622 | } |
| 623 | mySpi = nextSpi(mySpi, true); |
| 624 | } |
| 625 | } while (mySpi != null); |
| 626 | throw failure; |
| 627 | } |
| 628 | } |