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Diffstat (limited to 'libjava/classpath/gnu/java/security/jce/prng/SecureRandomAdapter.java')
| -rw-r--r-- | libjava/classpath/gnu/java/security/jce/prng/SecureRandomAdapter.java | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/libjava/classpath/gnu/java/security/jce/prng/SecureRandomAdapter.java b/libjava/classpath/gnu/java/security/jce/prng/SecureRandomAdapter.java deleted file mode 100644 index 9307cfa7fb4..00000000000 --- a/libjava/classpath/gnu/java/security/jce/prng/SecureRandomAdapter.java +++ /dev/null @@ -1,184 +0,0 @@ -/* SecureRandomAdapter.java -- - Copyright (C) 2001, 2002, 2003, 2006 Free Software Foundation, Inc. - -This file is a 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 of the License, 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; if not, write to the Free Software -Foundation, Inc., 51 Franklin St, 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 gnu.java.security.jce.prng; - -import gnu.java.security.action.GetSecurityPropertyAction; -import gnu.classpath.SystemProperties; -import gnu.java.security.prng.LimitReachedException; -import gnu.java.security.prng.MDGenerator; - -import java.security.AccessController; -import java.security.SecureRandom; -import java.security.SecureRandomSpi; - -import java.util.Collections; -import java.util.logging.Level; -import java.util.logging.Logger; - -import java.io.InputStream; -import java.io.IOException; - -import java.net.MalformedURLException; -import java.net.URL; - -/** - * <p>The implementation of a generic {@link java.security.SecureRandom} adapter - * class to wrap gnu.crypto prng instances based on Message Digest algorithms.</p> - * - * <p>This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for - * the {@link java.security.SecureRandom} class, which provides the - * functionality of a cryptographically strong pseudo-random number generator.</p> - * - * <p>All the abstract methods in the {@link SecureRandomSpi} class are - * implemented by this class and all its sub-classes.</p> - */ -public abstract class SecureRandomAdapter - extends SecureRandomSpi -{ - - private boolean isSeeded = false; - - /** Our underlying prng instance. */ - private MDGenerator adaptee = new MDGenerator(); - - /** The name of the message digest algorithm used by the adaptee. */ - private String mdName; - - private static final Logger logger = - Logger.getLogger(SecureRandom.class.getName()); - - private static final String SECURERANDOM_SOURCE = "securerandom.source"; - private static final String JAVA_SECURITY_EGD = "java.security.egd"; - - /** - * <p>Trivial protected constructor.</p> - * - * @param mdName the canonical name of the underlying hash algorithm. - */ - protected SecureRandomAdapter(String mdName) - { - super(); - - this.mdName = mdName; - adaptee.init (Collections.singletonMap (MDGenerator.MD_NAME, mdName)); - } - - public static final byte[] getSeed(int numBytes) - { - URL sourceUrl = null; - String urlStr = null; - - byte[] buffer = new byte[numBytes]; - - GetSecurityPropertyAction action = - new GetSecurityPropertyAction(SECURERANDOM_SOURCE); - try - { - urlStr = (String) AccessController.doPrivileged(action); - if (urlStr != null) - sourceUrl = new URL(urlStr); - } - catch (MalformedURLException ignored) - { - logger.log(Level.WARNING, - SECURERANDOM_SOURCE + " property is malformed: {0}", - urlStr); - } - - if (sourceUrl == null) - { - try - { - urlStr = SystemProperties.getProperty(JAVA_SECURITY_EGD); - if (urlStr != null) - sourceUrl = new URL(urlStr); - } - catch (MalformedURLException mue) - { - logger.log(Level.WARNING, - JAVA_SECURITY_EGD + " property is malformed: {0}", - urlStr); - } - } - - if (sourceUrl != null) - { - try - { - InputStream in = sourceUrl.openStream(); - in.read(buffer); - return buffer; - } - catch (IOException ioe) - { - logger.log(Level.FINE, "error reading random bytes", ioe); - } - } - - // If we get here, we did not get any seed from a property URL. - VMSecureRandom.generateSeed(buffer, 0, buffer.length); - return buffer; - } - - public byte[] engineGenerateSeed(int numBytes) - { - return getSeed(numBytes); - } - - public void engineNextBytes(byte[] bytes) - { - if (!isSeeded) - { - engineSetSeed(engineGenerateSeed(32)); - } - try - { - adaptee.nextBytes(bytes, 0, bytes.length); - } - catch (LimitReachedException ignored) - { - } - } - - public void engineSetSeed(byte[] seed) - { - adaptee.addRandomBytes (seed); - isSeeded = true; - } -} |