4f9533c772
Imported GNU Classpath 0.90
* scripts/makemake.tcl: LocaleData.java moved to gnu/java/locale.
* sources.am: Regenerated.
* gcj/javaprims.h: Regenerated.
* Makefile.in: Regenerated.
* gcj/Makefile.in: Regenerated.
* include/Makefile.in: Regenerated.
* testsuite/Makefile.in: Regenerated.
* gnu/java/lang/VMInstrumentationImpl.java: New override.
* gnu/java/net/local/LocalSocketImpl.java: Likewise.
* gnu/classpath/jdwp/VMMethod.java: Likewise.
* gnu/classpath/jdwp/VMVirtualMachine.java: Update to latest
interface.
* java/lang/Thread.java: Add UncaughtExceptionHandler.
* java/lang/reflect/Method.java: Implements GenericDeclaration and
isSynthetic(),
* java/lang/reflect/Field.java: Likewise.
* java/lang/reflect/Constructor.java
* java/lang/Class.java: Implements Type, GenericDeclaration,
getSimpleName() and getEnclosing*() methods.
* java/lang/Class.h: Add new public methods.
* java/lang/Math.java: Add signum(), ulp() and log10().
* java/lang/natMath.cc (log10): New function.
* java/security/VMSecureRandom.java: New override.
* java/util/logging/Logger.java: Updated to latest classpath
version.
* java/util/logging/LogManager.java: New override.
From-SVN: r113887
124 lines
4 KiB
Java
124 lines
4 KiB
Java
/* SecureRandomAdapter.java --
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Copyright (C) 2001, 2002, 2003, 2006 Free Software Foundation, Inc.
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This file is a part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at
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your option) any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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USA
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.security.jce.prng;
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import gnu.java.security.prng.LimitReachedException;
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import gnu.java.security.prng.MDGenerator;
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import java.security.SecureRandomSpi;
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import java.util.Collections;
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/**
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* <p>The implementation of a generic {@link java.security.SecureRandom} adapter
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* class to wrap gnu.crypto prng instances based on Message Digest algorithms.</p>
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*
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* <p>This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for
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* the {@link java.security.SecureRandom} class, which provides the
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* functionality of a cryptographically strong pseudo-random number generator.</p>
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*
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* <p>All the abstract methods in the {@link SecureRandomSpi} class are
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* implemented by this class and all its sub-classes.</p>
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*/
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abstract class SecureRandomAdapter extends SecureRandomSpi
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{
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// Constants and variables
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// -------------------------------------------------------------------------
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/** Our underlying prng instance. */
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private MDGenerator adaptee = new MDGenerator();
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/** The name of the message digest algorithm used by the adaptee. */
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private String mdName;
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// Constructor(s)
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// -------------------------------------------------------------------------
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/**
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* <p>Trivial protected constructor.</p>
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*
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* @param mdName the canonical name of the underlying hash algorithm.
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*/
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protected SecureRandomAdapter(String mdName)
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{
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super();
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this.mdName = mdName;
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adaptee.init (Collections.singletonMap (MDGenerator.MD_NAME, mdName));
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}
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// Class methods
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// -------------------------------------------------------------------------
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// Instance methods
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// -------------------------------------------------------------------------
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// java.security.SecureRandomSpi interface implementation ------------------
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public byte[] engineGenerateSeed(int numBytes)
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{
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if (numBytes < 1)
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{
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return new byte[0];
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}
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byte[] result = new byte[numBytes];
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this.engineNextBytes(result);
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return result;
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}
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public void engineNextBytes(byte[] bytes)
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{
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if (!adaptee.isInitialised())
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{
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this.engineSetSeed(new byte[0]);
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}
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try
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{
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adaptee.nextBytes(bytes, 0, bytes.length);
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}
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catch (LimitReachedException ignored)
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{
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}
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}
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public void engineSetSeed(byte[] seed)
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{
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adaptee.addRandomBytes (seed);
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}
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}
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