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Diffstat (limited to 'libjava/classpath/java/security/AlgorithmParameterGenerator.java')
| -rw-r--r-- | libjava/classpath/java/security/AlgorithmParameterGenerator.java | 277 |
1 files changed, 0 insertions, 277 deletions
diff --git a/libjava/classpath/java/security/AlgorithmParameterGenerator.java b/libjava/classpath/java/security/AlgorithmParameterGenerator.java deleted file mode 100644 index a92552b9edc..00000000000 --- a/libjava/classpath/java/security/AlgorithmParameterGenerator.java +++ /dev/null @@ -1,277 +0,0 @@ -/* AlgorithmParameterGenerator.java --- Algorithm Parameter Generator - Copyright (C) 1999, 2003, 2004 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath is distributed in the hope that it will be useful, but -WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package java.security; - -import gnu.java.lang.CPStringBuilder; - -import gnu.java.security.Engine; - -import java.lang.reflect.InvocationTargetException; -import java.security.spec.AlgorithmParameterSpec; - -/** - * <code>AlgorithmParameterGenerator</code> is used to generate algorithm - * parameters for specified algorithms. - * - * <p>In case the client does not explicitly initialize the - * <code>AlgorithmParameterGenerator</code> (via a call to an - * <code>init()</code> method), each provider must supply (and document) a - * default initialization. For example, the <b>GNU</b> provider uses a default - * modulus prime size of <code>1024</code> bits for the generation of <i>DSA</i> - * parameters. - * - * @author Mark Benvenuto - * @since 1.2 - * @see AlgorithmParameters - * @see AlgorithmParameterSpec - */ -public class AlgorithmParameterGenerator -{ - /** Service name for algorithm parameter generators. */ - private static final String ALGORITHM_PARAMETER_GENERATOR = - "AlgorithmParameterGenerator"; - - private AlgorithmParameterGeneratorSpi paramGenSpi; - private Provider provider; - private String algorithm; - - /** - * Constructs a new instance of <code>AlgorithmParameterGenerator</code>. - * - * @param paramGenSpi - * the generator to use. - * @param provider - * the provider to use. - * @param algorithm - * the algorithm to use. - */ - protected AlgorithmParameterGenerator(AlgorithmParameterGeneratorSpi - paramGenSpi, Provider provider, - String algorithm) - { - this.paramGenSpi = paramGenSpi; - this.provider = provider; - this.algorithm = algorithm; - } - - /** @return the name of the algorithm. */ - public final String getAlgorithm() - { - return algorithm; - } - - /** - * Returns a new <code>AlgorithmParameterGenerator</code> instance which - * generates algorithm parameters for the specified algorithm. - * - * @param algorithm the name of algorithm to use. - * @return the new instance. - * @throws NoSuchAlgorithmException if <code>algorithm</code> is not - * implemented by any provider. - * @throws IllegalArgumentException if <code>algorithm</code> is - * <code>null</code> or is an empty string. - */ - public static AlgorithmParameterGenerator getInstance(String algorithm) - throws NoSuchAlgorithmException - { - Provider[] p = Security.getProviders(); - NoSuchAlgorithmException lastException = null; - for (int i = 0; i < p.length; i++) - try - { - return getInstance(algorithm, p[i]); - } - catch (NoSuchAlgorithmException x) - { - lastException = x; - } - if (lastException != null) - throw lastException; - throw new NoSuchAlgorithmException(algorithm); - } - - /** - * Returns a new <code>AlgorithmParameterGenerator</code> instance which - * generates algorithm parameters for the specified algorithm. - * - * @param algorithm the name of algorithm to use. - * @param provider the name of the {@link Provider} to use. - * @return the new instance. - * @throws NoSuchAlgorithmException if the algorithm is not implemented by the - * named provider. - * @throws NoSuchProviderException if the named provider was not found. - * @throws IllegalArgumentException if either <code>algorithm</code> or - * <code>provider</code> is <code>null</code> or empty. - */ - public static AlgorithmParameterGenerator getInstance(String algorithm, - String provider) - throws NoSuchAlgorithmException, NoSuchProviderException - { - if (provider == null) - throw new IllegalArgumentException("provider MUST NOT be null"); - provider = provider.trim(); - if (provider.length() == 0) - throw new IllegalArgumentException("provider MUST NOT be empty"); - Provider p = Security.getProvider(provider); - if (p == null) - throw new NoSuchProviderException(provider); - return getInstance(algorithm, p); - } - - /** - * Returns a new <code>AlgorithmParameterGenerator</code> instance which - * generates algorithm parameters for the specified algorithm. - * - * @param algorithm the name of algorithm to use. - * @param provider the {@link Provider} to use. - * @return the new instance. - * @throws NoSuchAlgorithmException if the algorithm is not implemented by - * {@link Provider}. - * @throws IllegalArgumentException if either <code>algorithm</code> or - * <code>provider</code> is <code>null</code>, or if - * <code>algorithm</code> is an empty string. - * @since 1.4 - * @see Provider - */ - public static AlgorithmParameterGenerator getInstance(String algorithm, - Provider provider) - throws NoSuchAlgorithmException - { - CPStringBuilder sb = new CPStringBuilder() - .append("AlgorithmParameterGenerator for algorithm [") - .append(algorithm).append("] from provider[") - .append(provider).append("] could not be created"); - Throwable cause; - try - { - Object spi = Engine.getInstance(ALGORITHM_PARAMETER_GENERATOR, - algorithm, - provider); - return new AlgorithmParameterGenerator((AlgorithmParameterGeneratorSpi) spi, - provider, - algorithm); - } - catch (InvocationTargetException x) - { - cause = x.getCause(); - if (cause instanceof NoSuchAlgorithmException) - throw (NoSuchAlgorithmException) cause; - if (cause == null) - cause = x; - } - catch (ClassCastException x) - { - cause = x; - } - NoSuchAlgorithmException x = new NoSuchAlgorithmException(sb.toString()); - x.initCause(cause); - throw x; - } - - /** @return the {@link Provider} of this generator. */ - public final Provider getProvider() - { - return provider; - } - - /** - * Initializes this instance with the specified size. Since no source of - * randomness is supplied, a default one will be used. - * - * @param size - * size (in bits) to use. - */ - public final void init(int size) - { - init(size, new SecureRandom()); - } - - /** - * Initializes this instance with the specified key-size and source of - * randomness. - * - * @param size - * the size (in bits) to use. - * @param random - * the {@link SecureRandom} to use. - */ - public final void init(int size, SecureRandom random) - { - paramGenSpi.engineInit(size, random); - } - - /** - * Initializes this instance with the specified {@link AlgorithmParameterSpec}. - * Since no source of randomness is supplied, a default one will be used. - * - * @param genParamSpec - * the {@link AlgorithmParameterSpec} to use. - * @throws InvalidAlgorithmParameterException - * if <code>genParamSpec</code> is invalid. - */ - public final void init(AlgorithmParameterSpec genParamSpec) - throws InvalidAlgorithmParameterException - { - init(genParamSpec, new SecureRandom()); - } - - /** - * Initializes this instance with the specified {@link AlgorithmParameterSpec} - * and source of randomness. - * - * @param genParamSpec - * the {@link AlgorithmParameterSpec} to use. - * @param random - * the {@link SecureRandom} to use. - * @throws InvalidAlgorithmParameterException - * if <code>genParamSpec</code> is invalid. - */ - public final void init(AlgorithmParameterSpec genParamSpec, - SecureRandom random) - throws InvalidAlgorithmParameterException - { - paramGenSpi.engineInit(genParamSpec, random); - } - - /** @return a new instance of {@link AlgorithmParameters}. */ - public final AlgorithmParameters generateParameters() - { - return paramGenSpi.engineGenerateParameters(); - } -} |