1 files changed, 164 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/javax/crypto/assembly/PaddingTransformer.java b/gcc-4.4.3/libjava/classpath/gnu/javax/crypto/assembly/PaddingTransformer.java
new file mode 100644
index 000000000..c11f4fe88
--- /dev/null
+++ b/gcc-4.4.3/libjava/classpath/gnu/javax/crypto/assembly/PaddingTransformer.java
@@ -0,0 +1,164 @@
+/* PaddingTransformer.java -- 
+   Copyright (C) 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.assembly;
+
+import gnu.javax.crypto.pad.IPad;
+import gnu.javax.crypto.pad.WrongPaddingException;
+
+import java.util.Map;
+
+/**
+ * An Adapter to use any {@link IPad} as a {@link Transformer} in an
+ * {@link Assembly}.
+ * <p>
+ * When using such a {@link Transformer}, in an {@link Assembly}, there must
+ * be at least one element behind this instance in the constructed chain;
+ * otherwise, a {@link TransformerException} is thrown at initialisation time.
+ */
+class PaddingTransformer
+    extends Transformer
+{
+  private IPad delegate;
+
+  private int outputBlockSize = 1;
+
+  PaddingTransformer(IPad padding)
+  {
+    super();
+
+    this.delegate = padding;
+  }
+
+  void initDelegate(Map attributes) throws TransformerException
+  {
+    if (tail == null)
+      {
+        IllegalStateException cause = new IllegalStateException(
+            "Padding transformer missing its tail!");
+        throw new TransformerException("initDelegate()", cause);
+      }
+    outputBlockSize = tail.currentBlockSize();
+    delegate.init(outputBlockSize);
+  }
+
+  int delegateBlockSize()
+  {
+    return outputBlockSize;
+  }
+
+  void resetDelegate()
+  {
+    delegate.reset();
+    outputBlockSize = 1;
+  }
+
+  byte[] updateDelegate(byte[] in, int offset, int length)
+      throws TransformerException
+  {
+    inBuffer.write(in, offset, length);
+    byte[] tmp = inBuffer.toByteArray();
+    inBuffer.reset();
+    byte[] result;
+    if (wired == Direction.FORWARD) // padding
+      {
+        // buffers remaining bytes from (inBuffer + in) that are less than 1
+        // block
+        if (tmp.length < outputBlockSize)
+          {
+            inBuffer.write(tmp, 0, tmp.length);
+            result = new byte[0];
+          }
+        else
+          {
+            int newlen = outputBlockSize * (tmp.length / outputBlockSize);
+            inBuffer.write(tmp, newlen, tmp.length - newlen);
+            result = new byte[newlen];
+            System.arraycopy(tmp, 0, result, 0, newlen);
+          }
+      }
+    else // unpadding
+      {
+        // always keep in own buffer a max of 1 block to cater for lastUpdate
+        if (tmp.length < outputBlockSize)
+          {
+            inBuffer.write(tmp, 0, tmp.length);
+            result = new byte[0];
+          }
+        else
+          {
+            result = new byte[tmp.length - outputBlockSize];
+            System.arraycopy(tmp, 0, result, 0, result.length);
+            inBuffer.write(tmp, result.length, outputBlockSize);
+          }
+      }
+    return result;
+  }
+
+  byte[] lastUpdateDelegate() throws TransformerException
+  {
+    byte[] result;
+    // process multiples of blocksize as much as possible
+    // catenate result from processing inBuffer with last-update( tail )
+    if (wired == Direction.FORWARD) // padding
+      {
+        result = inBuffer.toByteArray();
+        byte[] padding = delegate.pad(result, 0, result.length);
+        inBuffer.write(padding, 0, padding.length);
+      }
+    else // unpadding
+      {
+        byte[] tmp = inBuffer.toByteArray();
+        inBuffer.reset();
+        int realLength;
+        try
+          {
+            realLength = tmp.length; // should be outputBlockSize
+            realLength -= delegate.unpad(tmp, 0, tmp.length);
+          }
+        catch (WrongPaddingException x)
+          {
+            throw new TransformerException("lastUpdateDelegate()", x);
+          }
+        inBuffer.write(tmp, 0, realLength);
+      }
+    result = inBuffer.toByteArray();
+    inBuffer.reset();
+    return result;
+  }
+}