87 lines
3.0 KiB
Java
87 lines
3.0 KiB
Java
/*
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* Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package javax.crypto;
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import java.security.*;
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import java.security.spec.*;
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/**
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* This class defines the <i>Service Provider Interface</i> (<b>SPI</b>)
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* for the <code>KeyGenerator</code> class.
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* All the abstract methods in this class must be implemented by each
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* cryptographic service provider who wishes to supply the implementation
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* of a key generator for a particular algorithm.
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*
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* @author Jan Luehe
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*
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* @see SecretKey
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* @since 1.4
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*/
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public abstract class KeyGeneratorSpi {
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/**
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* Initializes the key generator.
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*
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* @param random the source of randomness for this generator
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*/
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protected abstract void engineInit(SecureRandom random);
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/**
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* Initializes the key generator with the specified parameter
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* set and a user-provided source of randomness.
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*
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* @param params the key generation parameters
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* @param random the source of randomness for this key generator
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*
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* @exception InvalidAlgorithmParameterException if <code>params</code> is
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* inappropriate for this key generator
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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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* Initializes this key generator for a certain keysize, using the given
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* source of randomness.
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*
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* @param keysize the keysize. This is an algorithm-specific metric,
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* specified in number of bits.
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* @param random the source of randomness for this key generator
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*
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* @exception InvalidParameterException if the keysize is wrong or not
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* supported.
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*/
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protected abstract void engineInit(int keysize, SecureRandom random);
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/**
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* Generates a secret key.
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*
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* @return the new key
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*/
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protected abstract SecretKey engineGenerateKey();
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}
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