mirror of https://github.com/tasks/tasks
Added MD5 library for testing alternative implementation
Sam Bosley
12 years ago
parent
aa176785a8
commit
df5d9e25af
@ -0,0 +1,897 @@
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package com.twmacinta.util;
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import java.io.*;
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/**
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* Fast implementation of RSA's MD5 hash generator in Java JDK Beta-2 or higher.
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* <p>
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* Originally written by Santeri Paavolainen, Helsinki Finland 1996.<br>
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* (c) Santeri Paavolainen, Helsinki Finland 1996<br>
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* Many changes Copyright (c) 2002 - 2010 Timothy W Macinta<br>
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* <p>
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* <p>
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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* <p>
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* <p>
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* See http://www.twmacinta.com/myjava/fast_md5.php for more information
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* on this file and the related files.
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* <p>
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* This was originally a rather straight re-implementation of the
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* reference implementation given in RFC1321 by RSA. It passes the MD5
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* test suite as defined in RFC1321.
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* <p>
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* Many optimizations made by Timothy W Macinta. Reduced time to checksum a
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* test file in Java alone to roughly half the time taken compared with
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* java.security.MessageDigest (within an intepretter). Also added an
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* optional native method to reduce the time even further.
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* See http://www.twmacinta.com/myjava/fast_md5.php for further information
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* on the time improvements achieved.
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* <p>
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* Some bug fixes also made by Timothy W Macinta.
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* <p>
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* Please note: I (Timothy Macinta) have put this code in the
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* com.twmacinta.util package only because it came without a package. I
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* was not the the original author of the code, although I did
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* optimize it (substantially) and fix some bugs.
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* <p>
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* This Java class has been derived from the RSA Data Security, Inc. MD5
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* Message-Digest Algorithm and its reference implementation.
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* <p>
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* This class will attempt to use a native method to quickly compute
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* checksums when the appropriate native library is available. On Linux,
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* this library should be named "MD5.so" and on Windows it should be
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* named "MD5.dll". The code will attempt to locate the library in the
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* following locations in the order given:
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*
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* <ol>
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* <li>The path specified by the system property
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* "com.twmacinta.util.MD5.NATIVE_LIB_FILE"
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* (be sure to include "MD5.so", "MD5.dll",
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* or "MD5.jnilib" as appropriate at the end
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* of the path).
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* <li>A platform specific directory beneath the "lib/arch/" directory.
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* For example, On Windows for 32 bit x86 architectures, this is
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* "lib/arch/win32_x86/".
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* <li>Within the "lib/" directory.
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* <li>Within the current directory.
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* </ol>
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*
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* <p>
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* If the library is not found, the code will fall back to the default
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* (slower) Java code.
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* <p>
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* As a side effect of having the code search for the native library,
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* SecurityExceptions might be thrown on JVMs that have a restrictive
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* SecurityManager. The initialization code attempts to silently discard
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* these exceptions and continue, but many SecurityManagers will
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* attempt to notify the user directly of all SecurityExceptions thrown.
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* Consequently, the code has provisions for skipping the search for
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* the native library. Any of these provisions may be used to skip the
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* search as long as they are performed <i>before</i> the first
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* instance of a com.twmacinta.util.MD5 object is constructed (note that
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* the convenience stream objects will implicitly create an MD5 object).
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* <p>
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* The first option is to set the system property
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* "com.twmacinta.util.MD5.NO_NATIVE_LIB" to "true" or "1".
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* Unfortunately, SecurityManagers may also choose to disallow system
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* property setting, so this won't be of use in all cases.
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* <p>
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* The second option is to call
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* com.twmacinta.util.MD5.initNativeLibrary(true) before any MD5 objects
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* are constructed.
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*
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* @author Santeri Paavolainen <sjpaavol@cc.helsinki.fi>
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* @author Timothy W Macinta (twm@alum.mit.edu) (optimizations and bug fixes)
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*/
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public class MD5 {
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/**
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* MD5 state
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**/
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MD5State state;
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/**
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* If Final() has been called, finals is set to the current finals
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* state. Any Update() causes this to be set to null.
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**/
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MD5State finals;
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/**
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* Padding for Final()
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**/
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static byte padding[] = {
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(byte) 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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private static boolean native_lib_loaded = false;
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private static boolean native_lib_init_pending = true;
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/**
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* Initialize MD5 internal state (object can be reused just by
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* calling Init() after every Final()
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**/
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public synchronized void Init () {
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state = new MD5State();
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finals = null;
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}
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/**
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* Class constructor
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**/
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public MD5 () {
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if (native_lib_init_pending) _initNativeLibrary();
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this.Init();
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}
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/**
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* Initialize class, and update hash with ob.toString()
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*
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* @param ob Object, ob.toString() is used to update hash
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* after initialization
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**/
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public MD5 (Object ob) {
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this();
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Update(ob.toString());
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}
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private void Decode (byte buffer[], int shift, int[] out) {
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/*len += shift;
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for (int i = 0; shift < len; i++, shift += 4) {
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out[i] = ((int) (buffer[shift] & 0xff)) |
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(((int) (buffer[shift + 1] & 0xff)) << 8) |
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(((int) (buffer[shift + 2] & 0xff)) << 16) |
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(((int) buffer[shift + 3]) << 24);
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}*/
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// unrolled loop (original loop shown above)
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out[0] = ((int) (buffer[shift] & 0xff)) |
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(((int) (buffer[shift + 1] & 0xff)) << 8) |
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(((int) (buffer[shift + 2] & 0xff)) << 16) |
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(((int) buffer[shift + 3]) << 24);
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out[1] = ((int) (buffer[shift + 4] & 0xff)) |
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(((int) (buffer[shift + 5] & 0xff)) << 8) |
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(((int) (buffer[shift + 6] & 0xff)) << 16) |
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(((int) buffer[shift + 7]) << 24);
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out[2] = ((int) (buffer[shift + 8] & 0xff)) |
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(((int) (buffer[shift + 9] & 0xff)) << 8) |
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(((int) (buffer[shift + 10] & 0xff)) << 16) |
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(((int) buffer[shift + 11]) << 24);
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out[3] = ((int) (buffer[shift + 12] & 0xff)) |
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(((int) (buffer[shift + 13] & 0xff)) << 8) |
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(((int) (buffer[shift + 14] & 0xff)) << 16) |
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(((int) buffer[shift + 15]) << 24);
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out[4] = ((int) (buffer[shift + 16] & 0xff)) |
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(((int) (buffer[shift + 17] & 0xff)) << 8) |
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(((int) (buffer[shift + 18] & 0xff)) << 16) |
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(((int) buffer[shift + 19]) << 24);
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out[5] = ((int) (buffer[shift + 20] & 0xff)) |
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(((int) (buffer[shift + 21] & 0xff)) << 8) |
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(((int) (buffer[shift + 22] & 0xff)) << 16) |
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(((int) buffer[shift + 23]) << 24);
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out[6] = ((int) (buffer[shift + 24] & 0xff)) |
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(((int) (buffer[shift + 25] & 0xff)) << 8) |
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(((int) (buffer[shift + 26] & 0xff)) << 16) |
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(((int) buffer[shift + 27]) << 24);
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out[7] = ((int) (buffer[shift + 28] & 0xff)) |
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(((int) (buffer[shift + 29] & 0xff)) << 8) |
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(((int) (buffer[shift + 30] & 0xff)) << 16) |
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(((int) buffer[shift + 31]) << 24);
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out[8] = ((int) (buffer[shift + 32] & 0xff)) |
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(((int) (buffer[shift + 33] & 0xff)) << 8) |
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(((int) (buffer[shift + 34] & 0xff)) << 16) |
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(((int) buffer[shift + 35]) << 24);
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out[9] = ((int) (buffer[shift + 36] & 0xff)) |
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(((int) (buffer[shift + 37] & 0xff)) << 8) |
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(((int) (buffer[shift + 38] & 0xff)) << 16) |
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(((int) buffer[shift + 39]) << 24);
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out[10] = ((int) (buffer[shift + 40] & 0xff)) |
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(((int) (buffer[shift + 41] & 0xff)) << 8) |
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(((int) (buffer[shift + 42] & 0xff)) << 16) |
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(((int) buffer[shift + 43]) << 24);
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out[11] = ((int) (buffer[shift + 44] & 0xff)) |
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(((int) (buffer[shift + 45] & 0xff)) << 8) |
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(((int) (buffer[shift + 46] & 0xff)) << 16) |
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(((int) buffer[shift + 47]) << 24);
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out[12] = ((int) (buffer[shift + 48] & 0xff)) |
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(((int) (buffer[shift + 49] & 0xff)) << 8) |
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(((int) (buffer[shift + 50] & 0xff)) << 16) |
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(((int) buffer[shift + 51]) << 24);
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out[13] = ((int) (buffer[shift + 52] & 0xff)) |
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(((int) (buffer[shift + 53] & 0xff)) << 8) |
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(((int) (buffer[shift + 54] & 0xff)) << 16) |
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(((int) buffer[shift + 55]) << 24);
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out[14] = ((int) (buffer[shift + 56] & 0xff)) |
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(((int) (buffer[shift + 57] & 0xff)) << 8) |
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(((int) (buffer[shift + 58] & 0xff)) << 16) |
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(((int) buffer[shift + 59]) << 24);
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out[15] = ((int) (buffer[shift + 60] & 0xff)) |
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(((int) (buffer[shift + 61] & 0xff)) << 8) |
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(((int) (buffer[shift + 62] & 0xff)) << 16) |
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(((int) buffer[shift + 63]) << 24);
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}
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private native void Transform_native (int[] state, byte buffer[], int shift, int length);
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private void Transform (MD5State state, byte buffer[], int shift, int[] decode_buf) {
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int
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a = state.state[0],
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b = state.state[1],
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c = state.state[2],
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d = state.state[3],
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x[] = decode_buf;
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Decode(buffer, shift, decode_buf);
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/* Round 1 */
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a += ((b & c) | (~b & d)) + x[ 0] + 0xd76aa478; /* 1 */
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a = ((a << 7) | (a >>> 25)) + b;
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d += ((a & b) | (~a & c)) + x[ 1] + 0xe8c7b756; /* 2 */
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d = ((d << 12) | (d >>> 20)) + a;
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c += ((d & a) | (~d & b)) + x[ 2] + 0x242070db; /* 3 */
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c = ((c << 17) | (c >>> 15)) + d;
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b += ((c & d) | (~c & a)) + x[ 3] + 0xc1bdceee; /* 4 */
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b = ((b << 22) | (b >>> 10)) + c;
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a += ((b & c) | (~b & d)) + x[ 4] + 0xf57c0faf; /* 5 */
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a = ((a << 7) | (a >>> 25)) + b;
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d += ((a & b) | (~a & c)) + x[ 5] + 0x4787c62a; /* 6 */
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d = ((d << 12) | (d >>> 20)) + a;
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c += ((d & a) | (~d & b)) + x[ 6] + 0xa8304613; /* 7 */
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c = ((c << 17) | (c >>> 15)) + d;
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b += ((c & d) | (~c & a)) + x[ 7] + 0xfd469501; /* 8 */
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b = ((b << 22) | (b >>> 10)) + c;
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a += ((b & c) | (~b & d)) + x[ 8] + 0x698098d8; /* 9 */
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a = ((a << 7) | (a >>> 25)) + b;
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d += ((a & b) | (~a & c)) + x[ 9] + 0x8b44f7af; /* 10 */
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d = ((d << 12) | (d >>> 20)) + a;
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c += ((d & a) | (~d & b)) + x[10] + 0xffff5bb1; /* 11 */
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c = ((c << 17) | (c >>> 15)) + d;
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b += ((c & d) | (~c & a)) + x[11] + 0x895cd7be; /* 12 */
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b = ((b << 22) | (b >>> 10)) + c;
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a += ((b & c) | (~b & d)) + x[12] + 0x6b901122; /* 13 */
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a = ((a << 7) | (a >>> 25)) + b;
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d += ((a & b) | (~a & c)) + x[13] + 0xfd987193; /* 14 */
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d = ((d << 12) | (d >>> 20)) + a;
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c += ((d & a) | (~d & b)) + x[14] + 0xa679438e; /* 15 */
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c = ((c << 17) | (c >>> 15)) + d;
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b += ((c & d) | (~c & a)) + x[15] + 0x49b40821; /* 16 */
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b = ((b << 22) | (b >>> 10)) + c;
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/* Round 2 */
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a += ((b & d) | (c & ~d)) + x[ 1] + 0xf61e2562; /* 17 */
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a = ((a << 5) | (a >>> 27)) + b;
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d += ((a & c) | (b & ~c)) + x[ 6] + 0xc040b340; /* 18 */
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d = ((d << 9) | (d >>> 23)) + a;
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c += ((d & b) | (a & ~b)) + x[11] + 0x265e5a51; /* 19 */
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c = ((c << 14) | (c >>> 18)) + d;
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b += ((c & a) | (d & ~a)) + x[ 0] + 0xe9b6c7aa; /* 20 */
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b = ((b << 20) | (b >>> 12)) + c;
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a += ((b & d) | (c & ~d)) + x[ 5] + 0xd62f105d; /* 21 */
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a = ((a << 5) | (a >>> 27)) + b;
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d += ((a & c) | (b & ~c)) + x[10] + 0x02441453; /* 22 */
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d = ((d << 9) | (d >>> 23)) + a;
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c += ((d & b) | (a & ~b)) + x[15] + 0xd8a1e681; /* 23 */
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c = ((c << 14) | (c >>> 18)) + d;
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b += ((c & a) | (d & ~a)) + x[ 4] + 0xe7d3fbc8; /* 24 */
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b = ((b << 20) | (b >>> 12)) + c;
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a += ((b & d) | (c & ~d)) + x[ 9] + 0x21e1cde6; /* 25 */
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a = ((a << 5) | (a >>> 27)) + b;
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d += ((a & c) | (b & ~c)) + x[14] + 0xc33707d6; /* 26 */
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d = ((d << 9) | (d >>> 23)) + a;
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c += ((d & b) | (a & ~b)) + x[ 3] + 0xf4d50d87; /* 27 */
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c = ((c << 14) | (c >>> 18)) + d;
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b += ((c & a) | (d & ~a)) + x[ 8] + 0x455a14ed; /* 28 */
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b = ((b << 20) | (b >>> 12)) + c;
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a += ((b & d) | (c & ~d)) + x[13] + 0xa9e3e905; /* 29 */
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a = ((a << 5) | (a >>> 27)) + b;
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d += ((a & c) | (b & ~c)) + x[ 2] + 0xfcefa3f8; /* 30 */
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d = ((d << 9) | (d >>> 23)) + a;
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c += ((d & b) | (a & ~b)) + x[ 7] + 0x676f02d9; /* 31 */
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c = ((c << 14) | (c >>> 18)) + d;
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b += ((c & a) | (d & ~a)) + x[12] + 0x8d2a4c8a; /* 32 */
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b = ((b << 20) | (b >>> 12)) + c;
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/* Round 3 */
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a += (b ^ c ^ d) + x[ 5] + 0xfffa3942; /* 33 */
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a = ((a << 4) | (a >>> 28)) + b;
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d += (a ^ b ^ c) + x[ 8] + 0x8771f681; /* 34 */
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d = ((d << 11) | (d >>> 21)) + a;
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c += (d ^ a ^ b) + x[11] + 0x6d9d6122; /* 35 */
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c = ((c << 16) | (c >>> 16)) + d;
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b += (c ^ d ^ a) + x[14] + 0xfde5380c; /* 36 */
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b = ((b << 23) | (b >>> 9)) + c;
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a += (b ^ c ^ d) + x[ 1] + 0xa4beea44; /* 37 */
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a = ((a << 4) | (a >>> 28)) + b;
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d += (a ^ b ^ c) + x[ 4] + 0x4bdecfa9; /* 38 */
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d = ((d << 11) | (d >>> 21)) + a;
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c += (d ^ a ^ b) + x[ 7] + 0xf6bb4b60; /* 39 */
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c = ((c << 16) | (c >>> 16)) + d;
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b += (c ^ d ^ a) + x[10] + 0xbebfbc70; /* 40 */
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b = ((b << 23) | (b >>> 9)) + c;
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a += (b ^ c ^ d) + x[13] + 0x289b7ec6; /* 41 */
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a = ((a << 4) | (a >>> 28)) + b;
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d += (a ^ b ^ c) + x[ 0] + 0xeaa127fa; /* 42 */
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d = ((d << 11) | (d >>> 21)) + a;
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c += (d ^ a ^ b) + x[ 3] + 0xd4ef3085; /* 43 */
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c = ((c << 16) | (c >>> 16)) + d;
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b += (c ^ d ^ a) + x[ 6] + 0x04881d05; /* 44 */
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b = ((b << 23) | (b >>> 9)) + c;
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a += (b ^ c ^ d) + x[ 9] + 0xd9d4d039; /* 33 */
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a = ((a << 4) | (a >>> 28)) + b;
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d += (a ^ b ^ c) + x[12] + 0xe6db99e5; /* 34 */
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d = ((d << 11) | (d >>> 21)) + a;
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c += (d ^ a ^ b) + x[15] + 0x1fa27cf8; /* 35 */
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c = ((c << 16) | (c >>> 16)) + d;
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b += (c ^ d ^ a) + x[ 2] + 0xc4ac5665; /* 36 */
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b = ((b << 23) | (b >>> 9)) + c;
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/* Round 4 */
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a += (c ^ (b | ~d)) + x[ 0] + 0xf4292244; /* 49 */
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a = ((a << 6) | (a >>> 26)) + b;
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||||
d += (b ^ (a | ~c)) + x[ 7] + 0x432aff97; /* 50 */
|
||||
d = ((d << 10) | (d >>> 22)) + a;
|
||||
c += (a ^ (d | ~b)) + x[14] + 0xab9423a7; /* 51 */
|
||||
c = ((c << 15) | (c >>> 17)) + d;
|
||||
b += (d ^ (c | ~a)) + x[ 5] + 0xfc93a039; /* 52 */
|
||||
b = ((b << 21) | (b >>> 11)) + c;
|
||||
|
||||
a += (c ^ (b | ~d)) + x[12] + 0x655b59c3; /* 53 */
|
||||
a = ((a << 6) | (a >>> 26)) + b;
|
||||
d += (b ^ (a | ~c)) + x[ 3] + 0x8f0ccc92; /* 54 */
|
||||
d = ((d << 10) | (d >>> 22)) + a;
|
||||
c += (a ^ (d | ~b)) + x[10] + 0xffeff47d; /* 55 */
|
||||
c = ((c << 15) | (c >>> 17)) + d;
|
||||
b += (d ^ (c | ~a)) + x[ 1] + 0x85845dd1; /* 56 */
|
||||
b = ((b << 21) | (b >>> 11)) + c;
|
||||
|
||||
a += (c ^ (b | ~d)) + x[ 8] + 0x6fa87e4f; /* 57 */
|
||||
a = ((a << 6) | (a >>> 26)) + b;
|
||||
d += (b ^ (a | ~c)) + x[15] + 0xfe2ce6e0; /* 58 */
|
||||
d = ((d << 10) | (d >>> 22)) + a;
|
||||
c += (a ^ (d | ~b)) + x[ 6] + 0xa3014314; /* 59 */
|
||||
c = ((c << 15) | (c >>> 17)) + d;
|
||||
b += (d ^ (c | ~a)) + x[13] + 0x4e0811a1; /* 60 */
|
||||
b = ((b << 21) | (b >>> 11)) + c;
|
||||
|
||||
a += (c ^ (b | ~d)) + x[ 4] + 0xf7537e82; /* 61 */
|
||||
a = ((a << 6) | (a >>> 26)) + b;
|
||||
d += (b ^ (a | ~c)) + x[11] + 0xbd3af235; /* 62 */
|
||||
d = ((d << 10) | (d >>> 22)) + a;
|
||||
c += (a ^ (d | ~b)) + x[ 2] + 0x2ad7d2bb; /* 63 */
|
||||
c = ((c << 15) | (c >>> 17)) + d;
|
||||
b += (d ^ (c | ~a)) + x[ 9] + 0xeb86d391; /* 64 */
|
||||
b = ((b << 21) | (b >>> 11)) + c;
|
||||
|
||||
state.state[0] += a;
|
||||
state.state[1] += b;
|
||||
state.state[2] += c;
|
||||
state.state[3] += d;
|
||||
}
|
||||
|
||||
/**
|
||||
* Updates hash with the bytebuffer given (using at maximum length bytes from
|
||||
* that buffer)
|
||||
*
|
||||
* @param stat Which state is updated
|
||||
* @param buffer Array of bytes to be hashed
|
||||
* @param offset Offset to buffer array
|
||||
* @param length Use at maximum `length' bytes (absolute
|
||||
* maximum is buffer.length)
|
||||
*/
|
||||
public void Update (MD5State stat, byte buffer[], int offset, int length) {
|
||||
int index, partlen, i, start;
|
||||
finals = null;
|
||||
|
||||
/* Length can be told to be shorter, but not inter */
|
||||
if ((length - offset)> buffer.length)
|
||||
length = buffer.length - offset;
|
||||
|
||||
/* compute number of bytes mod 64 */
|
||||
|
||||
index = (int) (stat.count & 0x3f);
|
||||
stat.count += length;
|
||||
|
||||
partlen = 64 - index;
|
||||
|
||||
if (length >= partlen) {
|
||||
|
||||
// update state (using native method) to reflect input
|
||||
|
||||
if (native_lib_loaded) {
|
||||
if (partlen == 64) {
|
||||
partlen = 0;
|
||||
} else {
|
||||
for (i = 0; i < partlen; i++)
|
||||
stat.buffer[i + index] = buffer[i + offset];
|
||||
Transform_native(stat.state, stat.buffer, 0, 64);
|
||||
}
|
||||
i = partlen + ((length - partlen) / 64) * 64;
|
||||
|
||||
// break into chunks to guard against stack overflow in JNI
|
||||
|
||||
int transformLength = length - partlen;
|
||||
int transformOffset = partlen + offset;
|
||||
final int MAX_LENGTH = 65536; // prevent stack overflow in JNI
|
||||
while (true) {
|
||||
if (transformLength > MAX_LENGTH) {
|
||||
Transform_native(stat.state, buffer, transformOffset, MAX_LENGTH);
|
||||
transformLength -= MAX_LENGTH;
|
||||
transformOffset += MAX_LENGTH;
|
||||
} else {
|
||||
Transform_native(stat.state, buffer, transformOffset, transformLength);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// update state (using only Java) to reflect input
|
||||
|
||||
else {
|
||||
int[] decode_buf = new int[16];
|
||||
if (partlen == 64) {
|
||||
partlen = 0;
|
||||
} else {
|
||||
for (i = 0; i < partlen; i++)
|
||||
stat.buffer[i + index] = buffer[i + offset];
|
||||
Transform(stat, stat.buffer, 0, decode_buf);
|
||||
}
|
||||
for (i = partlen; (i + 63) < length; i+= 64) {
|
||||
Transform(stat, buffer, i + offset, decode_buf);
|
||||
}
|
||||
}
|
||||
index = 0;
|
||||
} else {
|
||||
i = 0;
|
||||
}
|
||||
|
||||
/* buffer remaining input */
|
||||
if (i < length) {
|
||||
start = i;
|
||||
for (; i < length; i++) {
|
||||
stat.buffer[index + i - start] = buffer[i + offset];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Update()s for other datatypes than byte[] also. Update(byte[], int)
|
||||
* is only the main driver.
|
||||
*/
|
||||
|
||||
/**
|
||||
* Plain update, updates this object
|
||||
**/
|
||||
public void Update (byte buffer[], int offset, int length) {
|
||||
Update(this.state, buffer, offset, length);
|
||||
}
|
||||
|
||||
public void Update (byte buffer[], int length) {
|
||||
Update(this.state, buffer, 0, length);
|
||||
}
|
||||
|
||||
/**
|
||||
* Updates hash with given array of bytes
|
||||
*
|
||||
* @param buffer Array of bytes to use for updating the hash
|
||||
**/
|
||||
public void Update (byte buffer[]) {
|
||||
Update(buffer, 0, buffer.length);
|
||||
}
|
||||
|
||||
/**
|
||||
* Updates hash with a single byte
|
||||
*
|
||||
* @param b Single byte to update the hash
|
||||
**/
|
||||
public void Update (byte b) {
|
||||
byte buffer[] = new byte[1];
|
||||
buffer[0] = b;
|
||||
|
||||
Update(buffer, 1);
|
||||
}
|
||||
|
||||
/**
|
||||
* Update buffer with given string. Note that because the version of
|
||||
* the s.getBytes() method without parameters is used to convert the
|
||||
* string to a byte array, the results of this method may be different
|
||||
* on different platforms. The s.getBytes() method converts the string
|
||||
* into a byte array using the current platform's default character set
|
||||
* and may therefore have different results on platforms with different
|
||||
* default character sets. If a version that works consistently
|
||||
* across platforms with different default character sets is desired,
|
||||
* use the overloaded version of the Update() method which takes a
|
||||
* string and a character encoding.
|
||||
*
|
||||
* @param s String to be update to hash (is used as s.getBytes())
|
||||
**/
|
||||
public void Update (String s) {
|
||||
byte chars[] = s.getBytes();
|
||||
Update(chars, chars.length);
|
||||
}
|
||||
|
||||
/**
|
||||
* Update buffer with given string using the given encoding. If the
|
||||
* given encoding is null, the encoding "ISO8859_1" is used.
|
||||
*
|
||||
* @param s String to be update to hash (is used as
|
||||
* s.getBytes(charset_name))
|
||||
* @param charset_name The character set to use to convert s to a
|
||||
* byte array, or null if the "ISO8859_1"
|
||||
* character set is desired.
|
||||
* @exception java.io.UnsupportedEncodingException If the named
|
||||
* charset is not supported.
|
||||
**/
|
||||
public void Update (String s, String charset_name) throws java.io.UnsupportedEncodingException {
|
||||
if (charset_name == null) charset_name = "ISO8859_1";
|
||||
byte chars[] = s.getBytes(charset_name);
|
||||
Update(chars, chars.length);
|
||||
}
|
||||
|
||||
/**
|
||||
* Update buffer with a single integer (only & 0xff part is used,
|
||||
* as a byte)
|
||||
*
|
||||
* @param i Integer value, which is then converted to byte as i & 0xff
|
||||
**/
|
||||
public void Update (int i) {
|
||||
Update((byte) (i & 0xff));
|
||||
}
|
||||
|
||||
private byte[] Encode (int input[], int len) {
|
||||
int i, j;
|
||||
byte out[];
|
||||
|
||||
out = new byte[len];
|
||||
|
||||
for (i = j = 0; j < len; i++, j += 4) {
|
||||
out[j] = (byte) (input[i] & 0xff);
|
||||
out[j + 1] = (byte) ((input[i] >>> 8) & 0xff);
|
||||
out[j + 2] = (byte) ((input[i] >>> 16) & 0xff);
|
||||
out[j + 3] = (byte) ((input[i] >>> 24) & 0xff);
|
||||
}
|
||||
|
||||
return out;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns array of bytes (16 bytes) representing hash as of the
|
||||
* current state of this object. Note: getting a hash does not
|
||||
* invalidate the hash object, it only creates a copy of the real
|
||||
* state which is finalized.
|
||||
*
|
||||
* @return Array of 16 bytes, the hash of all updated bytes
|
||||
**/
|
||||
public synchronized byte[] Final () {
|
||||
byte bits[];
|
||||
int index, padlen;
|
||||
MD5State fin;
|
||||
|
||||
if (finals == null) {
|
||||
fin = new MD5State(state);
|
||||
|
||||
int[] count_ints = {(int) (fin.count << 3), (int) (fin.count >> 29)};
|
||||
bits = Encode(count_ints, 8);
|
||||
|
||||
index = (int) (fin.count & 0x3f);
|
||||
padlen = (index < 56) ? (56 - index) : (120 - index);
|
||||
|
||||
Update(fin, padding, 0, padlen);
|
||||
Update(fin, bits, 0, 8);
|
||||
|
||||
/* Update() sets finals to null */
|
||||
finals = fin;
|
||||
}
|
||||
|
||||
return Encode(finals.state, 16);
|
||||
}
|
||||
|
||||
private static final char[] HEX_CHARS = {'0', '1', '2', '3',
|
||||
'4', '5', '6', '7',
|
||||
'8', '9', 'a', 'b',
|
||||
'c', 'd', 'e', 'f',};
|
||||
|
||||
/**
|
||||
* Turns array of bytes into string representing each byte as
|
||||
* unsigned hex number.
|
||||
*
|
||||
* @param hash Array of bytes to convert to hex-string
|
||||
* @return Generated hex string
|
||||
*/
|
||||
public static String asHex (byte hash[]) {
|
||||
char buf[] = new char[hash.length * 2];
|
||||
for (int i = 0, x = 0; i < hash.length; i++) {
|
||||
buf[x++] = HEX_CHARS[(hash[i] >>> 4) & 0xf];
|
||||
buf[x++] = HEX_CHARS[hash[i] & 0xf];
|
||||
}
|
||||
return new String(buf);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns 32-character hex representation of this objects hash
|
||||
*
|
||||
* @return String of this object's hash
|
||||
*/
|
||||
public String asHex () {
|
||||
return asHex(this.Final());
|
||||
}
|
||||
|
||||
/**
|
||||
* Convenience method for initNativeLibrary(false).
|
||||
**/
|
||||
public static synchronized final boolean initNativeLibrary () {
|
||||
return initNativeLibrary(false);
|
||||
}
|
||||
|
||||
/**
|
||||
* Attempts to initialize native library support. If
|
||||
* 'disallow_lib_loading' is true, will indicate that the native
|
||||
* library should not be loaded now or in the future. If native
|
||||
* library support has been previously loaded or disabled, this
|
||||
* method has no effect.
|
||||
*
|
||||
* @return true iff native library support has been loaded
|
||||
**/
|
||||
public static synchronized final boolean initNativeLibrary (boolean disallow_lib_loading) {
|
||||
if (disallow_lib_loading) {
|
||||
native_lib_init_pending = false;
|
||||
} else {
|
||||
_initNativeLibrary();
|
||||
}
|
||||
return native_lib_loaded;
|
||||
}
|
||||
|
||||
private static synchronized final void _initNativeLibrary () {
|
||||
if (!native_lib_init_pending) return;
|
||||
native_lib_loaded = _loadNativeLibrary();
|
||||
native_lib_init_pending = false;
|
||||
}
|
||||
|
||||
private static synchronized final boolean _loadNativeLibrary () {
|
||||
try {
|
||||
|
||||
// don't try to load if the right property is set
|
||||
|
||||
String prop = System.getProperty("com.twmacinta.util.MD5.NO_NATIVE_LIB");
|
||||
if (prop != null) {
|
||||
prop = prop.trim();
|
||||
if (prop.equalsIgnoreCase("true") || prop.equals("1")) return false;
|
||||
}
|
||||
|
||||
// the library to load can be specified as a property
|
||||
|
||||
File f;
|
||||
prop = System.getProperty("com.twmacinta.util.MD5.NATIVE_LIB_FILE");
|
||||
if (prop != null) {
|
||||
f = new File(prop);
|
||||
if (f.canRead()) {
|
||||
System.load(f.getAbsolutePath());
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
// determine the operating system and architecture
|
||||
|
||||
String os_name = System.getProperty("os.name");
|
||||
String os_arch = System.getProperty("os.arch");
|
||||
if (os_name == null || os_arch == null) return false;
|
||||
os_name = os_name.toLowerCase();
|
||||
os_arch = os_arch.toLowerCase();
|
||||
|
||||
// define settings which are OS arch architecture independent
|
||||
|
||||
File arch_lib_path = null;
|
||||
String arch_libfile_suffix = null;
|
||||
|
||||
// fill in settings for Linux on x86
|
||||
|
||||
if (os_name.equals("linux") &&
|
||||
(os_arch.equals("x86") ||
|
||||
os_arch.equals("i386") ||
|
||||
os_arch.equals("i486") ||
|
||||
os_arch.equals("i586") ||
|
||||
os_arch.equals("i686"))) {
|
||||
arch_lib_path = new File(new File(new File("lib"), "arch"), "linux_x86");
|
||||
arch_libfile_suffix = ".so";
|
||||
}
|
||||
|
||||
// fill in settings for Linux on amd64
|
||||
|
||||
else if (os_name.equals("linux") &&
|
||||
os_arch.equals("amd64")) {
|
||||
arch_lib_path = new File(new File(new File("lib"), "arch"), "linux_amd64");
|
||||
arch_libfile_suffix = ".so";
|
||||
}
|
||||
|
||||
// fill in settings for Windows on x86
|
||||
|
||||
else if (os_name.startsWith("windows ") &&
|
||||
(os_arch.equals("x86") ||
|
||||
os_arch.equals("i386") ||
|
||||
os_arch.equals("i486") ||
|
||||
os_arch.equals("i586") ||
|
||||
os_arch.equals("i686"))) {
|
||||
arch_lib_path = new File(new File(new File("lib"), "arch"), "win32_x86");
|
||||
arch_libfile_suffix = ".dll";
|
||||
}
|
||||
|
||||
// fill in settings for Windows on amd64
|
||||
|
||||
else if (os_name.startsWith("windows ") &&
|
||||
os_arch.equals("amd64")) {
|
||||
arch_lib_path = new File(new File(new File("lib"), "arch"), "win_amd64");
|
||||
arch_libfile_suffix = ".dll";
|
||||
}
|
||||
|
||||
// fill in settings for Mac OS X on PPC
|
||||
|
||||
else if (os_name.startsWith("mac os x") &&
|
||||
(os_arch.equals("ppc"))) {
|
||||
arch_lib_path = new File(new File(new File("lib"), "arch"), "darwin_ppc");
|
||||
arch_libfile_suffix = ".jnilib";
|
||||
}
|
||||
|
||||
// fill in settings for Mac OS X on x86
|
||||
|
||||
else if (os_name.startsWith("mac os x") &&
|
||||
(os_arch.equals("x86") ||
|
||||
os_arch.equals("i386") ||
|
||||
os_arch.equals("i486") ||
|
||||
os_arch.equals("i586") ||
|
||||
os_arch.equals("i686"))) {
|
||||
arch_lib_path = new File(new File(new File("lib"), "arch"), "darwin_x86");
|
||||
arch_libfile_suffix = ".jnilib";
|
||||
}
|
||||
|
||||
// fill in settings for Mac OS X on x86_64
|
||||
|
||||
else if (os_name.startsWith("mac os x") &&
|
||||
os_arch.equals("x86_64")) {
|
||||
arch_lib_path = new File(new File(new File("lib"), "arch"), "darwin_x86_64");
|
||||
arch_libfile_suffix = ".jnilib";
|
||||
}
|
||||
|
||||
// fill in settings for FreeBSD on x86
|
||||
|
||||
else if (os_name.equals("freebsd") &&
|
||||
(os_arch.equals("x86") ||
|
||||
os_arch.equals("i386") ||
|
||||
os_arch.equals("i486") ||
|
||||
os_arch.equals("i586") ||
|
||||
os_arch.equals("i686"))) {
|
||||
arch_lib_path = new File(new File(new File("lib"), "arch"), "freebsd_x86");
|
||||
arch_libfile_suffix = ".so";
|
||||
}
|
||||
|
||||
// fill in settings for FreeBSD on amd64
|
||||
|
||||
else if (os_name.equals("freebsd") &&
|
||||
os_arch.equals("amd64")) {
|
||||
arch_lib_path = new File(new File(new File("lib"), "arch"), "freebsd_amd64");
|
||||
arch_libfile_suffix = ".so";
|
||||
}
|
||||
|
||||
// default to .so files with no architecture specific subdirectory
|
||||
|
||||
else {
|
||||
arch_libfile_suffix = ".so";
|
||||
}
|
||||
|
||||
// build the required filename
|
||||
|
||||
String fname = "MD5" + arch_libfile_suffix;
|
||||
|
||||
// try the architecture specific directory
|
||||
|
||||
if (arch_lib_path != null) {
|
||||
f = new File(arch_lib_path, fname);
|
||||
if (f.canRead()) {
|
||||
System.load(f.getAbsolutePath());
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
// try the "lib" subdirectory
|
||||
|
||||
f = new File(new File("lib"), fname);
|
||||
if (f.canRead()) {
|
||||
System.load(f.getAbsolutePath());
|
||||
return true;
|
||||
}
|
||||
|
||||
// try the working directory
|
||||
|
||||
f = new File(fname);
|
||||
if (f.canRead()) {
|
||||
System.load(f.getAbsolutePath());
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
// discard SecurityExceptions
|
||||
|
||||
catch (SecurityException e) {}
|
||||
|
||||
// Intercept UnsatisfiedLinkError since the code will still
|
||||
// work without the native method, but report it because it
|
||||
// indicates that the architecture detection and/or support
|
||||
// should be updated.
|
||||
|
||||
catch (UnsatisfiedLinkError e) {
|
||||
e.printStackTrace();
|
||||
}
|
||||
|
||||
// unable to load
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Calculates and returns the hash of the contents of the given file.
|
||||
**/
|
||||
public static byte[] getHash (File f) throws IOException {
|
||||
if (!f.exists()) throw new FileNotFoundException(f.toString());
|
||||
InputStream close_me = null;
|
||||
try {
|
||||
long buf_size = f.length();
|
||||
if (buf_size < 512) buf_size = 512;
|
||||
if (buf_size > 65536) buf_size = 65536;
|
||||
byte[] buf = new byte[(int) buf_size];
|
||||
MD5InputStream in = new MD5InputStream(new FileInputStream(f));
|
||||
close_me = in;
|
||||
while (in.read(buf) != -1);
|
||||
in.close();
|
||||
return in.hash();
|
||||
} catch (IOException e) {
|
||||
if (close_me != null) try { close_me.close(); } catch (Exception e2) {}
|
||||
throw e;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @return true iff the first 16 bytes of both hash1 and hash2 are
|
||||
* equal; both hash1 and hash2 are null; or either hash
|
||||
* array is less than 16 bytes in length and their lengths and
|
||||
* all of their bytes are equal.
|
||||
**/
|
||||
public static boolean hashesEqual (byte[] hash1, byte[] hash2) {
|
||||
if (hash1 == null) return hash2 == null;
|
||||
if (hash2 == null) return false;
|
||||
int targ = 16;
|
||||
if (hash1.length < 16) {
|
||||
if (hash2.length != hash1.length) return false;
|
||||
targ = hash1.length;
|
||||
} else if (hash2.length < 16) {
|
||||
return false;
|
||||
}
|
||||
for (int i = 0; i < targ; i++) {
|
||||
if (hash1[i] != hash2[i]) return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
}
|
||||
@ -0,0 +1,169 @@
|
||||
package com.twmacinta.util;
|
||||
|
||||
import java.io.*;
|
||||
|
||||
/**
|
||||
* MD5InputStream, a subclass of FilterInputStream implementing MD5
|
||||
* functionality on a stream.
|
||||
* <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 MD5InputStream extends FilterInputStream {
|
||||
/**
|
||||
* MD5 context
|
||||
*/
|
||||
private MD5 md5;
|
||||
|
||||
/**
|
||||
* Creates a MD5InputStream
|
||||
* @param in The input stream
|
||||
*/
|
||||
public MD5InputStream (InputStream in) {
|
||||
super(in);
|
||||
|
||||
md5 = new MD5();
|
||||
}
|
||||
|
||||
/**
|
||||
* Read a byte of data.
|
||||
* @see java.io.FilterInputStream
|
||||
*/
|
||||
public int read() throws IOException {
|
||||
int c = in.read();
|
||||
|
||||
if (c == -1)
|
||||
return -1;
|
||||
|
||||
if ((c & ~0xff) != 0) {
|
||||
System.out.println("MD5InputStream.read() got character with (c & ~0xff) != 0)!");
|
||||
} else {
|
||||
md5.Update(c);
|
||||
}
|
||||
|
||||
return c;
|
||||
}
|
||||
|
||||
/**
|
||||
* Reads into an array of bytes.
|
||||
*
|
||||
* @see java.io.FilterInputStream
|
||||
*/
|
||||
public int read (byte bytes[], int offset, int length) throws IOException {
|
||||
int r;
|
||||
|
||||
if ((r = in.read(bytes, offset, length)) == -1)
|
||||
return r;
|
||||
|
||||
md5.Update(bytes, offset, r);
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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 {
|
||||
|
||||
////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// usage: java com.twmacinta.util.MD5InputStream [--use-default-md5] [--no-native-lib] filename
|
||||
//
|
||||
/////////
|
||||
|
||||
// determine the filename to use and the MD5 impelementation to use
|
||||
|
||||
String filename = arg[arg.length-1];
|
||||
boolean use_default_md5 = false;
|
||||
boolean use_native_lib = true;
|
||||
for (int i = 0; i < arg.length-1; i++) {
|
||||
if (arg[i].equals("--use-default-md5")) {
|
||||
use_default_md5 = true;
|
||||
} else if (arg[i].equals("--no-native-lib")) {
|
||||
use_native_lib = false;
|
||||
}
|
||||
}
|
||||
|
||||
// initialize common variables
|
||||
|
||||
byte[] buf = new byte[65536];
|
||||
int num_read;
|
||||
|
||||
// Use the default MD5 implementation that comes with Java
|
||||
|
||||
if (use_default_md5) {
|
||||
InputStream in = new BufferedInputStream(new FileInputStream(filename));
|
||||
java.security.MessageDigest digest = java.security.MessageDigest.getInstance("MD5");
|
||||
while ((num_read = in.read(buf)) != -1) {
|
||||
digest.update(buf, 0, num_read);
|
||||
}
|
||||
System.out.println(MD5.asHex(digest.digest())+" "+filename);
|
||||
in.close();
|
||||
|
||||
// Use the optimized MD5 implementation
|
||||
|
||||
} else {
|
||||
|
||||
// disable the native library search, if requested
|
||||
|
||||
if (!use_native_lib) {
|
||||
MD5.initNativeLibrary(true);
|
||||
}
|
||||
|
||||
// calculate the checksum
|
||||
|
||||
MD5InputStream in = new MD5InputStream(new BufferedInputStream(new FileInputStream(filename)));
|
||||
while ((num_read = in.read(buf)) != -1);
|
||||
System.out.println(MD5.asHex(in.hash())+" "+filename);
|
||||
in.close();
|
||||
}
|
||||
} catch (Exception e) {
|
||||
e.printStackTrace();
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -0,0 +1,79 @@
|
||||
package com.twmacinta.util;
|
||||
|
||||
/**
|
||||
* Fast implementation of RSA's MD5 hash generator in Java JDK Beta-2 or higher<br>
|
||||
* 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>
|
||||
* Contains internal state of the MD5 class
|
||||
* <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 <sjpaavol@cc.helsinki.fi>
|
||||
* @author Timothy W Macinta (twm@alum.mit.edu) (optimizations and bug fixes)
|
||||
**/
|
||||
|
||||
class MD5State {
|
||||
/**
|
||||
* 128-bit state
|
||||
*/
|
||||
int state[];
|
||||
|
||||
/**
|
||||
* 64-bit character count
|
||||
*/
|
||||
long count;
|
||||
|
||||
/**
|
||||
* 64-byte buffer (512 bits) for storing to-be-hashed characters
|
||||
*/
|
||||
byte buffer[];
|
||||
|
||||
public MD5State() {
|
||||
buffer = new byte[64];
|
||||
count = 0;
|
||||
state = new int[4];
|
||||
|
||||
state[0] = 0x67452301;
|
||||
state[1] = 0xefcdab89;
|
||||
state[2] = 0x98badcfe;
|
||||
state[3] = 0x10325476;
|
||||
|
||||
}
|
||||
|
||||
/** Create this State as a copy of another state */
|
||||
public MD5State (MD5State from) {
|
||||
this();
|
||||
|
||||
int i;
|
||||
|
||||
for (i = 0; i < buffer.length; i++)
|
||||
this.buffer[i] = from.buffer[i];
|
||||
|
||||
for (i = 0; i < state.length; i++)
|
||||
this.state[i] = from.state[i];
|
||||
|
||||
this.count = from.count;
|
||||
}
|
||||
};
|
||||
Loading…
Reference in New Issue