0N/A/*
2362N/A * Copyright (c) 1998, 2009, Oracle and/or its affiliates. All rights reserved.
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2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
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0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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0N/A */
0N/A
0N/Apackage com.sun.crypto.provider;
0N/A
0N/Aimport java.security.SecureRandom;
0N/Aimport java.security.InvalidParameterException;
0N/Aimport java.security.InvalidAlgorithmParameterException;
0N/Aimport java.security.spec.AlgorithmParameterSpec;
0N/Aimport javax.crypto.KeyGeneratorSpi;
0N/Aimport javax.crypto.SecretKey;
0N/Aimport javax.crypto.spec.SecretKeySpec;
0N/A
0N/A/**
0N/A * This class generates a secret key for use with the Blowfish algorithm.
0N/A *
0N/A * @author Jan Luehe
0N/A *
0N/A */
0N/A
0N/Apublic final class BlowfishKeyGenerator extends KeyGeneratorSpi {
0N/A
0N/A private SecureRandom random = null;
0N/A private int keysize = 16; // default keysize (in number of bytes)
0N/A
0N/A /**
1460N/A * Empty constructor
0N/A */
0N/A public BlowfishKeyGenerator() {
0N/A }
0N/A
0N/A /**
0N/A * Initializes this key generator.
0N/A *
0N/A * @param random the source of randomness for this generator
0N/A */
0N/A protected void engineInit(SecureRandom random) {
0N/A this.random = random;
0N/A }
0N/A
0N/A /**
0N/A * Initializes this key generator with the specified parameter
0N/A * set and a user-provided source of randomness.
0N/A *
0N/A * @param params the key generation parameters
0N/A * @param random the source of randomness for this key generator
0N/A *
0N/A * @exception InvalidAlgorithmParameterException if <code>params</code> is
0N/A * inappropriate for this key generator
0N/A */
0N/A protected void engineInit(AlgorithmParameterSpec params,
0N/A SecureRandom random)
0N/A throws InvalidAlgorithmParameterException
0N/A {
0N/A throw new InvalidAlgorithmParameterException
0N/A ("Blowfish key generation does not take any parameters");
0N/A }
0N/A
0N/A /**
0N/A * Initializes this key generator for a certain keysize, using the given
0N/A * source of randomness.
0N/A *
0N/A * @param keysize the keysize. This is an algorithm-specific
0N/A * metric specified in number of bits.
0N/A * @param random the source of randomness for this key generator
0N/A */
0N/A protected void engineInit(int keysize, SecureRandom random) {
0N/A if (((keysize % 8) != 0) || (keysize < 32) || (keysize > 448)) {
0N/A throw new InvalidParameterException("Keysize must be "
0N/A + "multiple of 8, and can "
0N/A + "only range from 32 to 448 "
0N/A + "(inclusive)");
0N/A }
0N/A this.keysize = keysize / 8;
0N/A this.engineInit(random);
0N/A }
0N/A
0N/A /**
0N/A * Generates a Blowfish key.
0N/A *
0N/A * @return the new Blowfish key
0N/A */
0N/A protected SecretKey engineGenerateKey() {
0N/A if (this.random == null) {
0N/A this.random = SunJCE.RANDOM;
0N/A }
0N/A
0N/A byte[] keyBytes = new byte[this.keysize];
0N/A this.random.nextBytes(keyBytes);
0N/A
0N/A return new SecretKeySpec(keyBytes, "Blowfish");
0N/A }
0N/A}