Imported GNU Classpath 0.90

Imported GNU Classpath 0.90
       * scripts/makemake.tcl: Set gnu/java/awt/peer/swing to ignore.
       * gnu/classpath/jdwp/VMFrame.java (SIZE): New constant.
       * java/lang/VMCompiler.java: Use gnu.java.security.hash.MD5.
       * java/lang/Math.java: New override file.
       * java/lang/Character.java: Merged from Classpath.
       (start, end): Now 'int's.
       (canonicalName): New field.
       (CANONICAL_NAME, NO_SPACES_NAME, CONSTANT_NAME): New constants.
       (UnicodeBlock): Added argument.
       (of): New overload.
       (forName): New method.
       Updated unicode blocks.
       (sets): Updated.
       * sources.am: Regenerated.
       * Makefile.in: Likewise.

From-SVN: r111942

libjava/classpath/gnu/java/security/key/dss/DSSPublicKey.java

@@ -0,0 +1,201 @@
+/* DSSPublicKey.java -- 
+   Copyright 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.key.dss;
+
+import gnu.java.security.Registry;
+import gnu.java.security.key.IKeyPairCodec;
+
+import java.math.BigInteger;
+import java.security.PublicKey;
+import java.security.interfaces.DSAPublicKey;
+
+/**
+ * <p>An object that embodies a DSS (Digital Signature Standard) public key.</p>
+ * 
+ * @version $Revision: 1.2 $
+ * @see #getEncoded
+ */
+public class DSSPublicKey extends DSSKey implements PublicKey, DSAPublicKey
+{
+
+  // Constants and variables
+  // -------------------------------------------------------------------------
+
+  /**
+   * <code>y = g<sup>x</sup> mod p</code> where <code>x</code> is the private
+   * part of the DSA key.
+   */
+  private final BigInteger y;
+
+  // Constructor(s)
+  // -------------------------------------------------------------------------
+
+  /**
+   * Conveience constructor. Calls the constructor with 5 arguments passing
+   * {@link Registry#RAW_ENCODING_ID} as the identifier of the preferred
+   * encoding format.
+   * 
+   * @param p the public modulus.
+   * @param q the public prime divisor of <code>p-1</code>.
+   * @param g a generator of the unique cyclic group <code>Z<sup>*</sup>
+   *          <sub>p</sub></code>.
+   * @param y the public key part.
+   */
+  public DSSPublicKey(BigInteger p, BigInteger q, BigInteger g, BigInteger y)
+  {
+    this(Registry.RAW_ENCODING_ID, p, q, g, y);
+  }
+
+  /**
+   * Constructs a new instance of <code>DSSPublicKey</code> given the designated
+   * arguments.
+   * 
+   * @param preferredFormat the identifier of the preferred encoding format to
+   *          use when externalizing this key.
+   * @param p the public modulus.
+   * @param q the public prime divisor of <code>p-1</code>.
+   * @param g a generator of the unique cyclic group <code>Z<sup>*</sup>
+   *          <sub>p</sub></code>.
+   * @param y the public key part.
+   */
+  public DSSPublicKey(int preferredFormat, BigInteger p, BigInteger q,
+                      BigInteger g, BigInteger y)
+  {
+    super(preferredFormat == Registry.ASN1_ENCODING_ID ? Registry.X509_ENCODING_ID
+                                                       : preferredFormat,
+          p, q, g);
+
+    this.y = y;
+  }
+
+  // Class methods
+  // -------------------------------------------------------------------------
+
+  /**
+   * A class method that takes the output of the <code>encodePublicKey()</code>
+   * method of a DSS keypair codec object (an instance implementing
+   * {@link gnu.java.security.key.IKeyPairCodec} for DSS keys, and re-constructs
+   * an instance of this object.
+   * 
+   * @param k the contents of a previously encoded instance of this object.
+   * @exception ArrayIndexOutOfBoundsException if there is not enough bytes, in
+   *              <code>k</code>, to represent a valid encoding of an
+   *              instance of this object.
+   * @exception IllegalArgumentException if the byte sequence does not represent
+   *              a valid encoding of an instance of this object.
+   */
+  public static DSSPublicKey valueOf(byte[] k)
+  {
+    // try RAW codec
+    if (k[0] == Registry.MAGIC_RAW_DSS_PUBLIC_KEY[0])
+      try
+        {
+          return (DSSPublicKey) new DSSKeyPairRawCodec().decodePublicKey(k);
+        }
+      catch (IllegalArgumentException ignored)
+        {
+        }
+
+    // try X.509 codec
+    return (DSSPublicKey) new DSSKeyPairX509Codec().decodePublicKey(k);
+  }
+
+  // Instance methods
+  // -------------------------------------------------------------------------
+
+  // java.security.interfaces.DSAPublicKey interface implementation ----------
+
+  public BigInteger getY()
+  {
+    return y;
+  }
+
+  // Other instance methods --------------------------------------------------
+
+  /**
+   * <p>Returns the encoded form of this public key according to the designated
+   * format.</p>
+   * 
+   * @param format the desired format identifier of the resulting encoding.
+   * @return the byte sequence encoding this key according to the designated
+   * format.
+   * @exception IllegalArgumentException if the format is not supported.
+   * @see DSSKeyPairRawCodec
+   */
+  public byte[] getEncoded(int format)
+  {
+    byte[] result;
+    switch (format)
+      {
+      case IKeyPairCodec.RAW_FORMAT:
+        result = new DSSKeyPairRawCodec().encodePublicKey(this);
+        break;
+      case IKeyPairCodec.X509_FORMAT:
+        result = new DSSKeyPairX509Codec().encodePublicKey(this);
+        break;
+      default:
+        throw new IllegalArgumentException("Unsupported encoding format: "
+                                           + format);
+      }
+    return result;
+  }
+
+  /**
+   * <p>Returns <code>true</code> if the designated object is an instance of
+   * {@link DSAPublicKey} and has the same DSS (Digital Signature Standard)
+   * parameter values as this one.</p>
+   * 
+   * @param obj the other non-null DSS key to compare to.
+   * @return <code>true</code> if the designated object is of the same type and
+   * value as this one.
+   */
+  public boolean equals(Object obj)
+  {
+    if (obj == null)
+      {
+        return false;
+      }
+    if (!(obj instanceof DSAPublicKey))
+      {
+        return false;
+      }
+    DSAPublicKey that = (DSAPublicKey) obj;
+    return super.equals(that) && y.equals(that.getY());
+  }
+}