1 files changed, 135 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/security/hash/IMessageDigest.java b/libjava/classpath/gnu/java/security/hash/IMessageDigest.java
new file mode 100644
index 00000000000..b3d7f69ca2e
--- /dev/null
+++ b/libjava/classpath/gnu/java/security/hash/IMessageDigest.java
@@ -0,0 +1,135 @@
+/* IMessageDigest.java -- 
+   Copyright (C) 2001, 2002, 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.hash;
+
+/**
+ * <p>The basic visible methods of any hash algorithm.</p>
+ *
+ * <p>A hash (or message digest) algorithm produces its output by iterating a
+ * basic compression function on blocks of data.</p>
+ */
+public interface IMessageDigest extends Cloneable
+{
+
+  // Constants
+  // -------------------------------------------------------------------------
+
+  // Methods
+  // -------------------------------------------------------------------------
+
+  /**
+   * <p>Returns the canonical name of this algorithm.</p>
+   *
+   * @return the canonical name of this instance.
+   */
+  String name();
+
+  /**
+   * <p>Returns the output length in bytes of this message digest algorithm.</p>
+   *
+   * @return the output length in bytes of this message digest algorithm.
+   */
+  int hashSize();
+
+  /**
+   * <p>Returns the algorithm's (inner) block size in bytes.</p>
+   *
+   * @return the algorithm's inner block size in bytes.
+   */
+  int blockSize();
+
+  /**
+   * <p>Continues a message digest operation using the input byte.</p>
+   *
+   * @param b the input byte to digest.
+   */
+  void update(byte b);
+
+  /**
+   * <p>Continues a message digest operation, by filling the buffer, processing
+   * data in the algorithm's HASH_SIZE-bit block(s), updating the context and
+   * count, and buffering the remaining bytes in buffer for the next
+   * operation.</p>
+   *
+   * @param in the input block.
+   */
+  void update(byte[] in);
+
+  /**
+   * <p>Continues a message digest operation, by filling the buffer, processing
+   * data in the algorithm's HASH_SIZE-bit block(s), updating the context and
+   * count, and buffering the remaining bytes in buffer for the next
+   * operation.</p>
+   *
+   * @param in the input block.
+   * @param offset start of meaningful bytes in input block.
+   * @param length number of bytes, in input block, to consider.
+   */
+  void update(byte[] in, int offset, int length);
+
+  /**
+   * <p>Completes the message digest by performing final operations such as
+   * padding and resetting the instance.</p>
+   *
+   * @return the array of bytes representing the hash value.
+   */
+  byte[] digest();
+
+  /**
+   * <p>Resets the current context of this instance clearing any eventually cached
+   * intermediary values.</p>
+   */
+  void reset();
+
+  /**
+   * <p>A basic test. Ensures that the digest of a pre-determined message is equal
+   * to a known pre-computed value.</p>
+   *
+   * @return <tt>true</tt> if the implementation passes a basic self-test.
+   * Returns <tt>false</tt> otherwise.
+   */
+  boolean selfTest();
+
+  /**
+   * <p>Returns a clone copy of this instance.</p>
+   *
+   * @return a clone copy of this instance.
+   */
+  Object clone();
+}