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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/security/SecureRandomSpi.java
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+/* SecureRandomSpi.java --- Secure Random Service Provider Interface
+ Copyright (C) 1999, 2005 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+package java.security;
+import java.io.Serializable;
+
+/**
+ SecureRandomSpi is the Service Provider Interface for SecureRandom
+ providers. It provides an interface for providers to the
+ SecureRandom engine to write their own pseudo-random number
+ generator.
+
+ @since JDK 1.2
+
+ @author Mark Benvenuto (ivymccough@worldnet.att.net)
+ */
+public abstract class SecureRandomSpi implements Serializable
+{
+ private static final long serialVersionUID = -2991854161009191830L;
+
+ /**
+ Default Constructor for SecureRandomSpi
+ */
+ public SecureRandomSpi()
+ {
+ }
+
+ /**
+ Updates the seed for SecureRandomSpi but does not reset seed.
+ It does to this so repeated called never decrease randomness.
+ */
+ protected abstract void engineSetSeed(byte[] seed);
+
+ /**
+ Gets a user specified number of bytes depending on the length
+ of the array?
+
+ @param bytes array to fill with random bytes
+ */
+ protected abstract void engineNextBytes(byte[] bytes);
+
+ /**
+ Gets a user specified number of bytes specified by the
+ parameter.
+
+ @param numBytes number of random bytes to generate
+
+ @return an array full of random bytes
+ */
+ protected abstract byte[] engineGenerateSeed(int numBytes);
+}