113 lines
4.0 KiB
Java
113 lines
4.0 KiB
Java
/* KeyGeneratorSpi.java -- The key generator service provider interface.
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.crypto;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.SecureRandom;
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import java.security.spec.AlgorithmParameterSpec;
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/**
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* The <i>Service Provider Interface</i> (<b>SPI</b>) for the {@link
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* KeyGenerator} class.
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*
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* <p>Providers wishing to implement a key generator must subclass this
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* and provide an appropriate implementation for all the abstract
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* methods below, and provide an appropriate entry in the master {@link
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* java.security.Provider} class (the service name for key generators is
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* <code>"KeyGenerator"</code>).
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*
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* @author Casey Marshall (csm@gnu.org)
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* @since 1.4
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* @see KeyGenerator
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*/
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public abstract class KeyGeneratorSpi
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{
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// Constructor.
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// ------------------------------------------------------------------------
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/** Create a new key generator SPI. */
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public KeyGeneratorSpi()
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{
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}
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// Abstract instance methods.
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// ------------------------------------------------------------------------
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/**
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* Generate a key, returning it as a {@link SecretKey}.
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*
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* @return The generated key.
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*/
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protected abstract SecretKey engineGenerateKey();
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/**
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* Initialize this key generator with parameters and a source of
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* randomness.
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*
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* @param params The parameters.
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* @param random The source of randomness.
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* @throws java.security.InvalidAlgorithmParameterException If the
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* parameters are inappropriate for this instance.
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*/
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protected abstract void engineInit(AlgorithmParameterSpec params,
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SecureRandom random)
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throws InvalidAlgorithmParameterException;
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/**
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* Initialize this key generator with a key size (in bits) and a
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* source of randomness.
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*
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* @param keySize The target key size, in bits.
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* @param random The source of randomness.
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* @throws java.security.InvalidParameterException If the
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* key size is illogical or unsupported.
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*/
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protected abstract void engineInit(int keySize, SecureRandom random);
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/**
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* Initialize this key generator with a source of randomness; the
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* implementation should use reasonable default parameters (such as
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* generated key size).
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*
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* @param random The source of randomness.
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*/
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protected abstract void engineInit(SecureRandom random);
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}
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