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downloading a git-generated archive based on the 'upstream' tag
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1 files changed, 283 insertions, 0 deletions

diff --git a/libjava/classpath/gnu/javax/security/auth/Password.java b/libjava/classpath/gnu/javax/security/auth/Password.java
new file mode 100644
index 000000000..8fb07ee6b
--- /dev/null
+++ b/libjava/classpath/gnu/javax/security/auth/Password.java
@@ -0,0 +1,283 @@
+/* Password.java -- opaque wrapper around a password.
+   Copyright (C) 2004, 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.security.auth;
+
+import gnu.java.security.util.ExpirableObject;
+
+/**
+ * Immutible, though destroyable, password class.
+ *
+ * <p>Extends {@link ExpirableObject}, implementing {@link doDestroy()}
+ * in which encapsulated {@link char[]}, and {@link byte[]} password fields
+ * are cleared (elements set to zero) in order to thwart memory heap
+ * snooping.
+ */
+public final class Password extends ExpirableObject
+{
+
+  // Constants and variables
+  // -------------------------------------------------------------------------
+
+  /**
+   * Password stored in {@link char[]} format.
+   */
+  private final char[] password;
+
+  /**
+   * Password stored in {@link byte[]} format.
+   */
+  private final byte[] bPassword;
+
+  /**
+   * Indicates whether this Password object's {@link doDestroy()} method has
+   * been called.  See also, {@link ExpirableObject#Destroy()}.
+   */
+  private boolean mIsDestroyed = false;
+
+  // Constructor(s)
+  // -------------------------------------------------------------------------
+
+  /**
+   * Create a new expirable Password object that will expire after the
+   * default timeout {@link ExpirableObject#DEFAULT_TIMEOUT}.
+   *
+   * @param password The character array password to associate with this
+   * Password object.
+   */
+  public Password (char[] password)
+  {
+    this (password, 0, password.length, DEFAULT_TIMEOUT);
+  }
+
+  /**
+   * Create a new expirable Password object that will expire after the
+   * timeout denoted by constructor parameter, <i>delay</i>.
+   *
+   * @param password The character array password to associate with this
+   * Password object.
+   * @param delay The number of miliseconds before this Password object
+   * will be automatically destroyed.
+   */
+  public Password (char[] password, long delay)
+  {
+    this (password, 0, password.length, delay);
+  }
+
+  /**
+   * Create a new expirable Password object that will expire after the
+   * default timeout {@link ExpirableObject#DEFAULT_TIMEOUT}.
+   *
+   * @param password The character array password to associate with this
+   * Password object.
+   * @param offset The <i>password</i> character array parameter element
+   * marking the beginning of the contained password string.
+   * @param length The number of characters, beginning at <i>offset</i>,
+   * to be copied into this object's {@link password} field.
+   */
+  public Password (char[] password, int offset, int length)
+  {
+    this (password, offset, length, DEFAULT_TIMEOUT);
+  }
+
+  /**
+   * Create a new expirable Password object that will expire after the
+   * timeout denoted by constructor parameter, <i>delay</i>.
+   *
+   * @param password The character array password to associate with this
+   * Password object.
+   * @param offset The <i>password</i> character array parameter element
+   * marking the beginning of the contained password string.
+   * @param length The number of characters, beginning at <i>offset</i>,
+   * to be copied into this object's {@link password} field.
+   * @param delay The number of miliseconds before this Password object
+   * will be automatically destroyed.
+   */
+  public Password (char[] password, int offset, int length, long delay)
+  {
+    super (delay);
+
+    if (offset < 0 || length < 0 || offset + length > password.length)
+      throw new ArrayIndexOutOfBoundsException ("off=" + offset + " length=" +
+                                                length + " array.length=" +
+                                                password.length);
+
+    int i, j;
+    this.password = new char[length];
+    bPassword = new byte[length];
+
+    for(i = 0, j = offset; i < length; i++, j++)
+      {
+        this.password[i] = password[j];
+        // XXX this should use character encodings, other than ASCII.
+        bPassword[i] = (byte) (password[j] & 0x7F);
+      }
+  }
+
+  /**
+   * Create a new expirable Password object that will expire after the
+   * default timeout {@link ExpirableObject#DEFAULT_TIMEOUT}.
+   *
+   * @param password The byte array password to associate with this
+   * Password object.
+   */
+  public Password (byte[] password)
+  {
+    this (password, 0, password.length, DEFAULT_TIMEOUT);
+  }
+
+  /**
+   * Create a new expirable Password object that will expire after the
+   * timeout denoted by constructor parameter, <i>delay</i>.
+   *
+   * @param password The byte array password to associate with this
+   * Password object.
+   * @param delay The number of miliseconds before this Password object
+   * will be automatically destroyed.
+   */
+  public Password (byte[] password, long delay)
+  {
+    this (password, 0, password.length, delay);
+  }
+
+  /**
+   * Create a new expirable Password object that will expire after the
+   * default timeout {@link ExpirableObject#DEFAULT_TIMEOUT}.
+   *
+   * @param password The byte array password to associate with this
+   * Password object.
+   * @param offset The <i>password</i> byte array parameter element
+   * marking the beginning of the contained password string.
+   * @param length The number of bytes, beginning at <i>offset</i>,
+   * to be copied into this object's {@link password} field.
+   */
+  public Password (byte[] password, int offset, int length)
+  {
+    this (password, offset, length, DEFAULT_TIMEOUT);
+  }
+
+  /**
+   * Create a new expirable Password object that will expire after the
+   * timeout denoted by constructor parameter, <i>delay</i>.
+   *
+   * @param password The byte array password to associate with this
+   * Password object.
+   * @param offset The <i>password</i> byte array parameter element
+   * marking the beginning of the contained password string.
+   * @param length The number of bytes, beginning at <i>offset</i>,
+   * to be copied into this object's {@link bPassword} field.
+   * @param delay The number of miliseconds before this Password object
+   * will be automatically destroyed.
+   */
+  public Password (byte[] password, int offset, int length, long delay)
+  {
+    super (delay);
+
+    if (offset < 0 || length < 0 || offset + length > password.length)
+      throw new ArrayIndexOutOfBoundsException ("off=" + offset + " length=" +
+                                                length + " array.length=" +
+                                                password.length);
+
+    int i, j;
+    this.password = new char[length];
+    bPassword = new byte[length];
+
+    for (i = 0, j = offset; i < length; i++, j++)
+      {
+        this.password[i] = (char) password[j];
+        bPassword[i] = password[j];
+      }
+  }
+
+  // Instance methods
+  // -------------------------------------------------------------------------
+
+  /**
+   * Returns a reference to the {@link char[]} password storage field,
+   * {@link password}.
+   */
+  public synchronized char[] getPassword()
+  {
+    if (mIsDestroyed)
+      throw new IllegalStateException ("Attempted destroyed password access.");
+
+    return password;
+  }
+
+  /**
+   * Returns a reference to the {@link byte[]} password storage field,
+   * {@link bPassword}.
+   */
+  public synchronized byte[] getBytes()
+  {
+    if (mIsDestroyed)
+      throw new IllegalStateException ("Attempted destroyed password access.");
+
+    return bPassword;
+  }
+
+  /**
+   * Sets password field char[], and byte[] array elements to zero.
+   * This method implements base class {@link ExpirableObject} abstract
+   * method, {@link ExpirableObject#doDestroy()}.  See also,
+   * {@link ExpirableObject#destroy()}.
+   */
+  protected synchronized void doDestroy()
+  {
+    if (isDestroyed())
+      return;
+    else
+      {
+        for (int i = 0; i < password.length; i++)
+          password[i] = 0;
+        for (int i = 0; i < bPassword.length; i++)
+          bPassword[i] = 0;
+        mIsDestroyed = true;
+      }
+  }
+
+  /**
+   * Returns true, or false relative to whether, or not this object's
+   * {@link doDestroy()} method has been called.  See also,
+   * {@ExpirableObject#destroy()}.
+   */
+  public synchronized boolean isDestroyed()
+  {
+    return (mIsDestroyed);
+  }
+}