0N/A/*
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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
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0N/A */
0N/A
0N/Apackage java.security;
0N/A
0N/A/**
0N/A * This class defines the <i>Service Provider Interface</i> (<b>SPI</b>)
0N/A * for the <code>SecureRandom</code> class.
0N/A * All the abstract methods in this class must be implemented by each
0N/A * service provider who wishes to supply the implementation
0N/A * of a cryptographically strong pseudo-random number generator.
0N/A *
0N/A *
0N/A * @see SecureRandom
0N/A * @since 1.2
0N/A */
0N/A
0N/Apublic abstract class SecureRandomSpi implements java.io.Serializable {
0N/A
0N/A private static final long serialVersionUID = -2991854161009191830L;
0N/A
0N/A /**
0N/A * Reseeds this random object. The given seed supplements, rather than
0N/A * replaces, the existing seed. Thus, repeated calls are guaranteed
0N/A * never to reduce randomness.
0N/A *
0N/A * @param seed the seed.
0N/A */
0N/A protected abstract void engineSetSeed(byte[] seed);
0N/A
0N/A /**
0N/A * Generates a user-specified number of random bytes.
0N/A *
0N/A * <p> If a call to <code>engineSetSeed</code> had not occurred previously,
0N/A * the first call to this method forces this SecureRandom implementation
0N/A * to seed itself. This self-seeding will not occur if
0N/A * <code>engineSetSeed</code> was previously called.
0N/A *
0N/A * @param bytes the array to be filled in with random bytes.
0N/A */
0N/A protected abstract void engineNextBytes(byte[] bytes);
0N/A
0N/A /**
0N/A * Returns the given number of seed bytes. This call may be used to
0N/A * seed other random number generators.
0N/A *
0N/A * @param numBytes the number of seed bytes to generate.
0N/A *
0N/A * @return the seed bytes.
0N/A */
0N/A protected abstract byte[] engineGenerateSeed(int numBytes);
0N/A}