1 files changed, 246 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/javax/net/ssl/provider/Extension.java b/libjava/classpath/gnu/javax/net/ssl/provider/Extension.java
new file mode 100644
index 000000000..5cbcd5790
--- /dev/null
+++ b/libjava/classpath/gnu/javax/net/ssl/provider/Extension.java
@@ -0,0 +1,246 @@
+/* Extension.java -- A TLS hello extension.
+   Copyright (C) 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.net.ssl.provider;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+/**
+ * An SSL hello extension.
+ *
+ * <pre>
+ * struct {
+ *   ExtensionType extension_type;
+ *   opaque extension_data<0..2^16-1>;
+ * } Extension;</pre>
+ *
+ * @author csm@gnu.org
+ */
+public final class Extension implements Builder, Constructed
+{
+
+  // Fields.
+  // -------------------------------------------------------------------------
+
+  private ByteBuffer buffer;
+
+  // Constructor.
+  // -------------------------------------------------------------------------
+
+  public Extension(final ByteBuffer buffer)
+  {
+    this.buffer = buffer.duplicate().order(ByteOrder.BIG_ENDIAN);
+  }
+
+  public Extension(final Type type, final Value value)
+  {
+    ByteBuffer valueBuffer = value.buffer();
+    int length = 2 + 2 + valueBuffer.remaining();
+    buffer = ByteBuffer.allocate(length);
+    buffer.putShort((short) type.getValue());
+    buffer.putShort((short) valueBuffer.remaining());
+    buffer.put(valueBuffer);
+    buffer.rewind();
+  }
+
+  // Instance methods.
+  // -------------------------------------------------------------------------
+
+  public int length ()
+  {
+    return (buffer.getShort (2) & 0xFFFF) + 4;
+  }
+
+  public ByteBuffer buffer()
+  {
+    return (ByteBuffer) buffer.duplicate().limit(length());
+  }
+
+  public Type type()
+  {
+    return Type.forValue (buffer.getShort (0) & 0xFFFF);
+  }
+
+  public byte[] valueBytes()
+  {
+    int len = buffer.getShort (2) & 0xFFFF;
+    byte[] value = new byte[len];
+    ((ByteBuffer) buffer.duplicate ().position (4)).get (value);
+    return value;
+  }
+
+  public ByteBuffer valueBuffer()
+  {
+    int len = buffer.getShort(2) & 0xFFFF;
+    return ((ByteBuffer) buffer.duplicate().position(4).limit(len+4)).slice();
+  }
+
+  public Value value()
+  {
+    switch (type ())
+      {
+        case SERVER_NAME:
+          return new ServerNameList(valueBuffer());
+
+        case MAX_FRAGMENT_LENGTH:
+          switch (valueBuffer().get() & 0xFF)
+            {
+              case 1: return MaxFragmentLength.LEN_2_9;
+              case 2: return MaxFragmentLength.LEN_2_10;
+              case 3: return MaxFragmentLength.LEN_2_11;
+              case 4: return MaxFragmentLength.LEN_2_12;
+              default:
+                throw new IllegalArgumentException("invalid max_fragment_len");
+            }
+
+        case TRUNCATED_HMAC:
+          return new TruncatedHMAC();
+
+        case CLIENT_CERTIFICATE_URL:
+          return new CertificateURL(valueBuffer());
+
+        case TRUSTED_CA_KEYS:
+          return new TrustedAuthorities(valueBuffer());
+
+        case STATUS_REQUEST:
+          return new CertificateStatusRequest(valueBuffer());
+
+        case SRP:
+        case CERT_TYPE:
+      }
+    return new UnresolvedExtensionValue(valueBuffer());
+  }
+
+  public void setLength (final int newLength)
+  {
+    if (newLength < 0 || newLength > 65535)
+      throw new IllegalArgumentException ("length is out of bounds");
+    buffer.putShort (2, (short) newLength);
+  }
+
+  public void setType (final Type type)
+  {
+    buffer.putShort(0, (short) type.getValue());
+  }
+
+  public void setValue (byte[] value)
+  {
+    setValue (value, 0, value.length);
+  }
+
+  public void setValue (final byte[] value, final int offset, final int length)
+  {
+    if (length != length ())
+      throw new IllegalArgumentException ("length is different than claimed length");
+    ((ByteBuffer) buffer.duplicate().position(4)).put(value, offset, length);
+  }
+
+  public String toString()
+  {
+    return toString(null);
+  }
+
+  public String toString(String prefix)
+  {
+    StringWriter str = new StringWriter();
+    PrintWriter out = new PrintWriter(str);
+    if (prefix != null) out.print (prefix);
+    out.println("struct {");
+    if (prefix != null) out.print (prefix);
+    out.println("  type = " + type () + ";");
+    if (prefix != null) out.print (prefix);
+    String subprefix = "  ";
+    if (prefix != null) subprefix = prefix + subprefix;
+    out.println("  value =");
+    out.println(value().toString(subprefix));
+    if (prefix != null) out.print (prefix);
+    out.print("} Extension;");
+    return str.toString();
+  }
+
+  // Inner classes.
+  // -------------------------------------------------------------------------
+
+  public static enum Type
+  {
+    SERVER_NAME            (0),
+    MAX_FRAGMENT_LENGTH    (1),
+    CLIENT_CERTIFICATE_URL (2),
+    TRUSTED_CA_KEYS        (3),
+    TRUNCATED_HMAC         (4),
+    STATUS_REQUEST         (5),
+    SRP                    (6),
+    CERT_TYPE              (7);
+
+    private final int value;
+
+    private Type(int value)
+    {
+      this.value = value;
+    }
+
+    public static Type forValue (final int value)
+    {
+      switch (value & 0xFFFF)
+        {
+          case 0: return SERVER_NAME;
+          case 1: return MAX_FRAGMENT_LENGTH;
+          case 2: return CLIENT_CERTIFICATE_URL;
+          case 3: return TRUSTED_CA_KEYS;
+          case 4: return TRUNCATED_HMAC;
+          case 5: return STATUS_REQUEST;
+          case 6: return SRP;
+          case 7: return CERT_TYPE;
+          default: return null;
+        }
+    }
+
+    public int getValue()
+    {
+      return value;
+    }
+  }
+
+  public static abstract class Value implements Builder, Constructed
+  {
+  }
+}