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Java Source | 1999-05-28 | 1.7 KB | 58 lines | [TEXT/CWIE] |
- /*
- * @(#)SecureRandomSpi.java 1.2 98/03/26
- *
- * Copyright 1998 by Sun Microsystems, Inc.,
- * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
- * All rights reserved.
- *
- * This software is the confidential and proprietary information
- * of Sun Microsystems, Inc. ("Confidential Information"). You
- * shall not disclose such Confidential Information and shall use
- * it only in accordance with the terms of the license agreement
- * you entered into with Sun.
- */
-
- package java.security;
-
- /**
- * This class defines the <i>Service Provider Interface</i> (<b>SPI</b>)
- * for the <code>SecureRandom</code> class.
- * All the abstract methods in this class must be implemented by each
- * service provider who wishes to supply the implementation
- * of a cryptographically strong pseudo-random number generator.
- *
- * @version 1.2, 99/03/26
- *
- * @see SecureRandom
- * @since JDK1.2
- */
-
- public abstract class SecureRandomSpi implements java.io.Serializable {
-
- /**
- * Reseeds this random object. The given seed supplements, rather than
- * replaces, the existing seed. Thus, repeated calls are guaranteed
- * never to reduce randomness.
- *
- * @param seed the seed.
- */
- protected abstract void engineSetSeed(byte[] seed);
-
- /**
- * Generates a user-specified number of random bytes.
- *
- * @param bytes the array to be filled in with random bytes.
- */
- protected abstract void engineNextBytes(byte[] bytes);
-
- /**
- * Returns the given number of seed bytes. This call may be used to
- * seed other random number generators.
- *
- * @param numBytes the number of seed bytes to generate.
- *
- * @return the seed bytes.
- */
- protected abstract byte[] engineGenerateSeed(int numBytes);
- }
-