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Diffstat (limited to 'libjava/classpath/java/security/KeyFactory.java')
| -rw-r--r-- | libjava/classpath/java/security/KeyFactory.java | 280 |
1 files changed, 0 insertions, 280 deletions
diff --git a/libjava/classpath/java/security/KeyFactory.java b/libjava/classpath/java/security/KeyFactory.java deleted file mode 100644 index 6f47de0..0000000 --- a/libjava/classpath/java/security/KeyFactory.java +++ /dev/null @@ -1,280 +0,0 @@ -/* KeyFactory.java --- Key Factory Class - 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.InvalidKeySpecException; -import java.security.spec.KeySpec; - -/** - * Key factories are used to convert keys (opaque cryptographic keys of type - * {@link Key}) into key specifications (transparent representations of the - * underlying key material). - * - * <p>Key factories are bi-directional. They allow a key class to be converted - * into a key specification (key material) and back again. For example DSA - * public keys can be specified as <code>DSAPublicKeySpec</code> or - * <code>X509EncodedKeySpec</code>. A key factory translates these key - * specifications.</p> - * - * @since 1.2 - * @see Key - * @see KeySpec - * @see java.security.spec.DSAPublicKeySpec - * @see java.security.spec.X509EncodedKeySpec - @author Mark Benvenuto - */ -public class KeyFactory -{ - /** The service name for key factories. */ - private static final String KEY_FACTORY = "KeyFactory"; - - private KeyFactorySpi keyFacSpi; - private Provider provider; - private String algorithm; - - /** - * Constructs a new instance of <code>KeyFactory</code> with the specified - * parameters. - * - * @param keyFacSpi - * the key factory to use. - * @param provider - * the provider to use. - * @param algorithm - * the name of the key algorithm to use. - */ - protected KeyFactory(KeyFactorySpi keyFacSpi, Provider provider, - String algorithm) - { - this.keyFacSpi = keyFacSpi; - this.provider = provider; - this.algorithm = algorithm; - } - - /** - * Returns a new instance of <code>KeyFactory</code> representing the - * specified key factory. - * - * @param algorithm the name of algorithm to use. - * @return a new instance repesenting the desired algorithm. - * @throws NoSuchAlgorithmException if the algorithm is not implemented by any - * provider. - * @throws IllegalArgumentException if <code>algorithm</code> is - * <code>null</code> or is an empty string. - */ - public static KeyFactory 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 instance of <code>KeyFactory</code> representing the - * specified key factory from the specified provider. - * - * @param algorithm the name of algorithm to use. - * @param provider the name of the provider to use. - * @return a new instance repesenting the desired algorithm. - * @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 KeyFactory 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 instance of <code>KeyFactory</code> representing the - * specified key factory from the designated {@link Provider}. - * - * @param algorithm the name of algorithm to use. - * @param provider the {@link Provider} to use. - * @return a new instance repesenting the desired algorithm. - * @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 KeyFactory getInstance(String algorithm, Provider provider) - throws NoSuchAlgorithmException - { - CPStringBuilder sb = new CPStringBuilder("KeyFactory for algorithm [") - .append(algorithm).append("] from provider[") - .append(provider).append("] could not be created"); - Throwable cause; - try - { - Object spi = Engine.getInstance(KEY_FACTORY, algorithm, provider); - return new KeyFactory((KeyFactorySpi) 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; - } - - /** - * Returns the {@link Provider} of this instance. - * - * @return the {@link Provider} of this instance. - */ - public final Provider getProvider() - { - return provider; - } - - /** - * Returns the name of the algorithm used. - * - * @return the name of the algorithm used. - */ - public final String getAlgorithm() - { - return algorithm; - } - - /** - * Generates a public key from the provided key specification. - * - * @param keySpec - * the key specification. - * @return the public key. - * @throws InvalidKeySpecException - * if the key specification is invalid. - */ - public final PublicKey generatePublic(KeySpec keySpec) - throws InvalidKeySpecException - { - return keyFacSpi.engineGeneratePublic(keySpec); - } - - /** - * Generates a private key from the provided key specification. - * - * @param keySpec - * the key specification. - * @return the private key. - * @throws InvalidKeySpecException - * if the key specification is invalid. - */ - public final PrivateKey generatePrivate(KeySpec keySpec) - throws InvalidKeySpecException - { - return keyFacSpi.engineGeneratePrivate(keySpec); - } - - /** - * Returns a key specification for the given key. <code>keySpec</code> - * identifies the specification class to return the key material in. - * - * @param key - * the key to use. - * @param keySpec - * the specification class to use. - * @return the key specification in an instance of the requested specification - * class. - * @throws InvalidKeySpecException - * the requested key specification is inappropriate for this key or - * the key is unrecognized. - */ - public final <T extends KeySpec> T getKeySpec(Key key, Class<T> keySpec) - throws InvalidKeySpecException - { - return keyFacSpi.engineGetKeySpec(key, keySpec); - } - - /** - * Translates the key from an unknown or untrusted provider into a key from - * this key factory. - * - * @param key - * the key to translate from. - * @return the translated key. - * @throws InvalidKeyException - * if the key cannot be processed by this key factory. - */ - public final Key translateKey(Key key) throws InvalidKeyException - { - return keyFacSpi.engineTranslateKey(key); - } -} |