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-rw-r--r--libjava/java/security/DigestOutputStream.java147
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diff --git a/libjava/java/security/DigestOutputStream.java b/libjava/java/security/DigestOutputStream.java
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--- a/libjava/java/security/DigestOutputStream.java
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-/* DigestOutputStream.java --- An output stream tied to a message digest
- Copyright (C) 1999 Free Software Foundation, Inc.
-
-This file is 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, 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; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 USA.
-
-As a special exception, if you link this library with other files to
-produce an executable, this library does not by itself cause the
-resulting executable to be covered by the GNU General Public License.
-This exception does not however invalidate any other reasons why the
-executable file might be covered by the GNU General Public License. */
-
-
-package java.security;
-
-import java.io.OutputStream;
-import java.io.FilterOutputStream;
-import java.io.IOException;
-
-/**
- DigestOutputStream is a class that ties an OutputStream with a
- MessageDigest. The Message Digest is used by the class to update it
- self as bytes are written to the OutputStream.
-
- The updating to the digest depends on the on flag which is set to
- true by default that tells the class to update the data in the
- message digest.
-
- @version 0.0
- @author Mark Benvenuto <ivymccough@worldnet.att.net>
-*/
-public class DigestOutputStream extends FilterOutputStream
-{
- /**
- The message digest for the DigestOutputStream
- */
- protected MessageDigest digest;
-
- //Manages the on flag
- private boolean state = true;
-
- /**
- Constructs a new DigestOutputStream. It associates a
- MessageDigest with the stream to compute the stream as data is
- written.
-
- @param stream An OutputStream to associate this stream with
- @param digest A MessageDigest to hash the stream with
- */
- public DigestOutputStream (OutputStream stream, MessageDigest digest)
- {
- super (stream);
- this.digest = digest;
- }
-
- /**
- Returns the MessageDigest associated with this DigestOutputStream
-
- @return The MessageDigest used to hash this stream
- */
- public MessageDigest getMessageDigest ()
- {
- return digest;
- }
-
- /**
- Sets the current MessageDigest to current parameter
-
- @param digest A MessageDigest to associate with this stream
- */
- public void setMessageDigest (MessageDigest digest)
- {
- this.digest = digest;
- }
-
-
- /**
- Updates the hash if the on flag is true and then writes a byte to
- the underlying output stream.
-
- @param b A byte to write to the output stream
-
- @exception IOException if the underlying output stream
- cannot write the byte, this is thrown.
- */
- public void write (int b) throws IOException
- {
- if (state)
- digest.update ((byte)b);
-
- super.write (b);
- }
-
- /**
- Updates the hash if the on flag is true and then writes the bytes
- to the underlying output stream.
-
- @param b Bytes to write to the output stream
- @param off Offset to start to start at in array
- @param len Length of data to write
-
- @exception IOException if the underlying output stream
- cannot write the bytes, this is thrown.
- */
- public void write (byte[] b, int off, int len) throws IOException
- {
- if (state)
- digest.update (b, off, len);
-
- super.write (b, off, len);
- }
-
- /**
- Sets the flag specifying if this DigestOutputStream updates the
- digest in the write() methods. The default is on;
-
- @param on True means it digests stream, false means it does not
- */
- public void on (boolean on)
- {
- state = on;
- }
-
- /**
- Converts the output stream and underlying message digest to a string.
-
- @return A string representing the output stream and message digest.
- */
- public String toString()
- {
- return "[Digest Output Stream] " + digest.toString();
- }
-}