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authorJing Yu <jingyu@google.com>2010-07-22 14:03:48 -0700
committerJing Yu <jingyu@google.com>2010-07-22 14:03:48 -0700
commitb094d6c4bf572654a031ecc4afe675154c886dc5 (patch)
tree89394c56b05e13a5413ee60237d65b0214fd98e2 /gcc-4.4.3/libjava/classpath/gnu/javax/crypto/jce/mac/MacAdapter.java
parentdc34721ac3bf7e3c406fba8cfe9d139393345ec5 (diff)
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commit gcc-4.4.3 which is used to build gcc-4.4.3 Android toolchain in master.
The source is based on fsf gcc-4.4.3 and contains local patches which are recorded in gcc-4.4.3/README.google. Change-Id: Id8c6d6927df274ae9749196a1cc24dbd9abc9887
Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/javax/crypto/jce/mac/MacAdapter.java')
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diff --git a/gcc-4.4.3/libjava/classpath/gnu/javax/crypto/jce/mac/MacAdapter.java b/gcc-4.4.3/libjava/classpath/gnu/javax/crypto/jce/mac/MacAdapter.java
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+/* MacAdapter.java --
+ Copyright (C) 2002, 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.javax.crypto.jce.mac;
+
+import gnu.javax.crypto.mac.IMac;
+import gnu.javax.crypto.mac.MacFactory;
+
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidKeyException;
+import java.security.Key;
+import java.security.spec.AlgorithmParameterSpec;
+import java.util.HashMap;
+import java.util.Map;
+import javax.crypto.MacSpi;
+
+/**
+ * The implementation of a generic {@link javax.crypto.Mac} adapter class to
+ * wrap GNU MAC instances.
+ * <p>
+ * This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for
+ * the {@link javax.crypto.Mac} class, which provides the functionality of a
+ * message authentication code algorithm, such as the <i>Hashed Message
+ * Authentication Code</i> (<b>HMAC</b>) algorithms.
+ */
+class MacAdapter
+ extends MacSpi
+ implements Cloneable
+{
+ /** Our MAC instance. */
+ protected IMac mac;
+ /** Our MAC attributes. */
+ protected Map attributes;
+
+ /**
+ * Creates a new Mac instance for the given name.
+ *
+ * @param name The name of the mac to create.
+ */
+ protected MacAdapter(String name)
+ {
+ mac = MacFactory.getInstance(name);
+ attributes = new HashMap();
+ }
+
+ /**
+ * Private constructor for cloning purposes.
+ *
+ * @param mac a clone of the internal {@link IMac} instance.
+ * @param attributes a clone of the current {@link Map} of attributes.
+ */
+ private MacAdapter(IMac mac, Map attributes)
+ {
+ super();
+
+ this.mac = mac;
+ this.attributes = attributes;
+ }
+
+ public Object clone() throws CloneNotSupportedException
+ {
+ return new MacAdapter((IMac) mac.clone(), new HashMap(attributes));
+ }
+
+ protected byte[] engineDoFinal()
+ {
+ byte[] result = mac.digest();
+ engineReset();
+ return result;
+ }
+
+ protected int engineGetMacLength()
+ {
+ return mac.macSize();
+ }
+
+ protected void engineInit(Key key, AlgorithmParameterSpec params)
+ throws InvalidKeyException, InvalidAlgorithmParameterException
+ {
+ if (! key.getFormat().equalsIgnoreCase("RAW"))
+ throw new InvalidKeyException("unknown key format " + key.getFormat());
+ attributes.put(IMac.MAC_KEY_MATERIAL, key.getEncoded());
+ mac.reset();
+ mac.init(attributes);
+ }
+
+ protected void engineReset()
+ {
+ mac.reset();
+ }
+
+ protected void engineUpdate(byte b)
+ {
+ mac.update(b);
+ }
+
+ protected void engineUpdate(byte[] in, int off, int len)
+ {
+ mac.update(in, off, len);
+ }
+}