package com.googlecode.flickr2twitter.com.twmacinta.util;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import com.googlecode.flickr2twitter.com.twmacinta.io.NullOutputStream;
/**
* MD5OutputStream is a subclass of FilterOutputStream adding MD5
* hashing of the output.
* <p>
* Originally written by Santeri Paavolainen, Helsinki Finland 1996 <br>
* (c) Santeri Paavolainen, Helsinki Finland 1996 <br>
* Some changes Copyright (c) 2002 Timothy W Macinta <br>
* <p>
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* <p>
* This library 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
* Library General Public License for more details.
* <p>
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
* <p>
* See http://www.twmacinta.com/myjava/fast_md5.php for more information
* on this file.
* <p>
* Please note: I (Timothy Macinta) have put this code in the
* com.twmacinta.util package only because it came without a package. I
* was not the the original author of the code, although I did
* optimize it (substantially) and fix some bugs.
*
* @author Santeri Paavolainen <santtu@cs.hut.fi>
* @author Timothy W Macinta (twm@alum.mit.edu) (added main() method)
**/
public class MD5OutputStream extends FilterOutputStream {
/**
* MD5 context
*/
private MD5 md5;
/**
* Creates MD5OutputStream
* @param out The output stream
*/
public MD5OutputStream (OutputStream out) {
super(out);
md5 = new MD5();
}
/**
* Writes a byte.
*
* @see java.io.FilterOutputStream
*/
public void write (int b) throws IOException {
out.write(b);
md5.Update((byte) b);
}
/**
* Writes a sub array of bytes.
*
* @see java.io.FilterOutputStream
*/
public void write (byte b[], int off, int len) throws IOException {
out.write(b, off, len);
md5.Update(b, off, len);
}
/**
* Returns array of bytes representing hash of the stream as finalized
* for the current state.
* @see MD5#Final
*/
public byte[] hash () {
return md5.Final();
}
public MD5 getMD5() {
return md5;
}
/**
* This method is here for testing purposes only - do not rely
* on it being here.
**/
public static void main(String[] arg) {
try {
MD5OutputStream out = new MD5OutputStream(new NullOutputStream());
InputStream in = new BufferedInputStream(new FileInputStream(arg[0]));
byte[] buf = new byte[65536];
int num_read;
long total_read = 0;
while ((num_read = in.read(buf)) != -1) {
total_read += num_read;
out.write(buf, 0, num_read);
}
System.out.println(MD5.asHex(out.hash())+" "+arg[0]);
in.close();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}