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authormark <mark@138bc75d-0d04-0410-961f-82ee72b054a4>2006-03-10 21:46:48 +0000
committermark <mark@138bc75d-0d04-0410-961f-82ee72b054a4>2006-03-10 21:46:48 +0000
commitce57ab760f69de6db452def7ffbf5b114a2d8694 (patch)
treeea38c56431c5d4528fb54254c3f8e50f517bede3 /libjava/classpath/gnu/javax/crypto/pad/BasePad.java
parent50996fe55769882de3f410896032c887f0ff0d04 (diff)
downloadppe42-gcc-ce57ab760f69de6db452def7ffbf5b114a2d8694.tar.gz
ppe42-gcc-ce57ab760f69de6db452def7ffbf5b114a2d8694.zip
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. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@111942 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libjava/classpath/gnu/javax/crypto/pad/BasePad.java')
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1 files changed, 153 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/javax/crypto/pad/BasePad.java b/libjava/classpath/gnu/javax/crypto/pad/BasePad.java
new file mode 100644
index 00000000000..49c5d050a85
--- /dev/null
+++ b/libjava/classpath/gnu/javax/crypto/pad/BasePad.java
@@ -0,0 +1,153 @@
+/* BasePad.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.javax.crypto.pad;
+
+/**
+ * <p>An abstract class to facilitate implementing padding algorithms.</p>
+ */
+public abstract class BasePad implements IPad
+{
+
+ // Constants and variables
+ // -------------------------------------------------------------------------
+
+ /** The canonical name prefix of the padding algorithm. */
+ protected String name;
+
+ /** The block size, in bytes, for this instance. */
+ protected int blockSize;
+
+ // Constructor(s)
+ // -------------------------------------------------------------------------
+
+ /** Trivial constructor for use by concrete subclasses. */
+ protected BasePad(final String name)
+ {
+ super();
+
+ this.name = name;
+ blockSize = -1;
+ }
+
+ // Class methods
+ // -------------------------------------------------------------------------
+
+ // Instance methods
+ // -------------------------------------------------------------------------
+
+ // IPad interface implementation -------------------------------------------
+
+ public String name()
+ {
+ final StringBuffer sb = new StringBuffer(name);
+ if (blockSize != -1)
+ {
+ sb.append('-').append(String.valueOf(8 * blockSize));
+ }
+ return sb.toString();
+ }
+
+ public void init(final int bs) throws IllegalStateException
+ {
+ if (blockSize != -1)
+ {
+ throw new IllegalStateException();
+ }
+ blockSize = bs;
+ setup();
+ }
+
+ public void reset()
+ {
+ blockSize = -1;
+ }
+
+ public boolean selfTest()
+ {
+ byte[] padBytes;
+ final int offset = 5;
+ final int limit = 1024;
+ final byte[] in = new byte[limit];
+ for (int bs = 2; bs < 256; bs++)
+ {
+ this.init(bs);
+ for (int i = 0; i < limit - offset - blockSize; i++)
+ {
+ padBytes = pad(in, offset, i);
+ if (((i + padBytes.length) % blockSize) != 0)
+ {
+ new RuntimeException(name()).printStackTrace(System.err);
+ return false;
+ }
+
+ System.arraycopy(padBytes, 0, in, offset + i, padBytes.length);
+ try
+ {
+ if (padBytes.length != unpad(in, offset, i + padBytes.length))
+ {
+ new RuntimeException(name()).printStackTrace(System.err);
+ return false;
+ }
+ }
+ catch (WrongPaddingException x)
+ {
+ x.printStackTrace(System.err);
+ return false;
+ }
+ }
+ this.reset();
+ }
+
+ return true;
+ }
+
+ // abstract methods to implement by subclasses -----------------------------
+
+ /**
+ * <p>If any additional checks or resource setup must be done by the
+ * subclass, then this is the hook for it. This method will be called before
+ * the {@link #init(int)} method returns.</p>
+ */
+ public abstract void setup();
+
+ public abstract byte[] pad(byte[] in, int off, int len);
+
+ public abstract int unpad(byte[] in, int off, int len)
+ throws WrongPaddingException;
+} \ No newline at end of file
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