md5.java

java 文件下载器。可自定义

// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   MD5.java

package org.gudy.azureus2.core3.util;

import java.io.PrintStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.security.MessageDigest;

// Referenced classes of package org.gudy.azureus2.core3.util:
//			BrokenMd5Hasher, ByteFormatter

public class MD5
{

	private int h0;
	private int h1;
	private int h2;
	private int h3;
	private int length;
	private ByteBuffer finalBuffer;

	public MD5()
	{
		finalBuffer = ByteBuffer.allocate(64);
		finalBuffer.position(0);
		finalBuffer.limit(64);
		reset();
	}

	public void transform(ByteBuffer M)
	{
		ByteOrder order = M.order();
		M.order(ByteOrder.LITTLE_ENDIAN);
		int x0 = M.getInt();
		int x1 = M.getInt();
		int x2 = M.getInt();
		int x3 = M.getInt();
		int x4 = M.getInt();
		int x5 = M.getInt();
		int x6 = M.getInt();
		int x7 = M.getInt();
		int x8 = M.getInt();
		int x9 = M.getInt();
		int x10 = M.getInt();
		int x11 = M.getInt();
		int x12 = M.getInt();
		int x13 = M.getInt();
		int x14 = M.getInt();
		int x15 = M.getInt();
		M.order(order);
		int a = h0;
		int b = h1;
		int c = h2;
		int d = h3;
		a += (b & c | ~b & d) + x0 + 0xd76aa478;
		a = b + (a << 7 | a >>> 25);
		d += (a & b | ~a & c) + x1 + 0xe8c7b756;
		d = a + (d << 12 | d >>> 20);
		c += (d & a | ~d & b) + x2 + 0x242070db;
		c = d + (c << 17 | c >>> 15);
		b += (c & d | ~c & a) + x3 + 0xc1bdceee;
		b = c + (b << 22 | b >>> 10);
		a += (b & c | ~b & d) + x4 + 0xf57c0faf;
		a = b + (a << 7 | a >>> 25);
		d += (a & b | ~a & c) + x5 + 0x4787c62a;
		d = a + (d << 12 | d >>> 20);
		c += (d & a | ~d & b) + x6 + 0xa8304613;
		c = d + (c << 17 | c >>> 15);
		b += (c & d | ~c & a) + x7 + 0xfd469501;
		b = c + (b << 22 | b >>> 10);
		a += (b & c | ~b & d) + x8 + 0x698098d8;
		a = b + (a << 7 | a >>> 25);
		d += (a & b | ~a & c) + x9 + 0x8b44f7af;
		d = a + (d << 12 | d >>> 20);
		c += (d & a | ~d & b) + x10 + -42063;
		c = d + (c << 17 | c >>> 15);
		b += (c & d | ~c & a) + x11 + 0x895cd7be;
		b = c + (b << 22 | b >>> 10);
		a += (b & c | ~b & d) + x12 + 0x6b901122;
		a = b + (a << 7 | a >>> 25);
		d += (a & b | ~a & c) + x13 + 0xfd987193;
		d = a + (d << 12 | d >>> 20);
		c += (d & a | ~d & b) + x14 + 0xa679438e;
		c = d + (c << 17 | c >>> 15);
		b += (c & d | ~c & a) + x15 + 0x49b40821;
		b = c + (b << 22 | b >>> 10);
		a += (b & d | c & ~d) + x1 + 0xf61e2562;
		a = b + (a << 5 | a >>> 27);
		d += (a & c | b & ~c) + x6 + 0xc040b340;
		d = a + (d << 9 | d >>> 23);
		c += (d & b | a & ~b) + x11 + 0x265e5a51;
		c = d + (c << 14 | c >>> 18);
		b += (c & a | d & ~a) + x0 + 0xe9b6c7aa;
		b = c + (b << 20 | b >>> 12);
		a += (b & d | c & ~d) + x5 + 0xd62f105d;
		a = b + (a << 5 | a >>> 27);
		d += (a & c | b & ~c) + x10 + 0x2441453;
		d = a + (d << 9 | d >>> 23);
		c += (d & b | a & ~b) + x15 + 0xd8a1e681;
		c = d + (c << 14 | c >>> 18);
		b += (c & a | d & ~a) + x4 + 0xe7d3fbc8;
		b = c + (b << 20 | b >>> 12);
		a += (b & d | c & ~d) + x9 + 0x21e1cde6;
		a = b + (a << 5 | a >>> 27);
		d += (a & c | b & ~c) + x14 + 0xc33707d6;
		d = a + (d << 9 | d >>> 23);
		c += (d & b | a & ~b) + x3 + 0xf4d50d87;
		c = d + (c << 14 | c >>> 18);
		b += (c & a | d & ~a) + x8 + 0x455a14ed;
		b = c + (b << 20 | b >>> 12);
		a += (b & d | c & ~d) + x13 + 0xa9e3e905;
		a = b + (a << 5 | a >>> 27);
		d += (a & c | b & ~c) + x2 + 0xfcefa3f8;
		d = a + (d << 9 | d >>> 23);
		c += (d & b | a & ~b) + x7 + 0x676f02d9;
		c = d + (c << 14 | c >>> 18);
		b += (c & a | d & ~a) + x12 + 0x8d2a4c8a;
		b = c + (b << 20 | b >>> 12);
		a += (b ^ c ^ d) + x5 + 0xfffa3942;
		a = b + (a << 4 | a >>> 28);
		d += (a ^ b ^ c) + x8 + 0x8771f681;
		d = a + (d << 11 | d >>> 21);
		c += (d ^ a ^ b) + x11 + 0x6d9d6122;
		c = d + (c << 16 | c >>> 16);
		b += (c ^ d ^ a) + x14 + 0xfde5380c;
		b = c + (b << 23 | b >>> 9);
		a += (b ^ c ^ d) + x1 + 0xa4beea44;
		a = b + (a << 4 | a >>> 28);
		d += (a ^ b ^ c) + x4 + 0x4bdecfa9;
		d = a + (d << 11 | d >>> 21);
		c += (d ^ a ^ b) + x7 + 0xf6bb4b60;
		c = d + (c << 16 | c >>> 16);
		b += (c ^ d ^ a) + x10 + 0xbebfbc70;
		b = c + (b << 23 | b >>> 9);
		a += (b ^ c ^ d) + x13 + 0x289b7ec6;
		a = b + (a << 4 | a >>> 28);
		d += (a ^ b ^ c) + x0 + 0xeaa127fa;
		d = a + (d << 11 | d >>> 21);
		c += (d ^ a ^ b) + x3 + 0xd4ef3085;
		c = d + (c << 16 | c >>> 16);
		b += (c ^ d ^ a) + x6 + 0x4881d05;
		b = c + (b << 23 | b >>> 9);
		a += (b ^ c ^ d) + x9 + 0xd9d4d039;
		a = b + (a << 4 | a >>> 28);
		d += (a ^ b ^ c) + x12 + 0xe6db99e5;
		d = a + (d << 11 | d >>> 21);
		c += (d ^ a ^ b) + x15 + 0x1fa27cf8;
		c = d + (c << 16 | c >>> 16);
		b += (c ^ d ^ a) + x2 + 0xc4ac5665;
		b = c + (b << 23 | b >>> 9);
		a += (c ^ (b | ~d)) + x0 + 0xf4292244;
		a = b + (a << 6 | a >>> 26);
		d += (b ^ (a | ~c)) + x7 + 0x432aff97;
		d = a + (d << 10 | d >>> 22);
		c += (a ^ (d | ~b)) + x14 + 0xab9423a7;
		c = d + (c << 15 | c >>> 17);
		b += (d ^ (c | ~a)) + x5 + 0xfc93a039;
		b = c + (b << 21 | b >>> 11);
		a += (c ^ (b | ~d)) + x12 + 0x655b59c3;
		a = b + (a << 6 | a >>> 26);
		d += (b ^ (a | ~c)) + x3 + 0x8f0ccc92;
		d = a + (d << 10 | d >>> 22);
		c += (a ^ (d | ~b)) + x10 + 0xffeff47d;
		c = d + (c << 15 | c >>> 17);
		b += (d ^ (c | ~a)) + x1 + 0x85845dd1;
		b = c + (b << 21 | b >>> 11);
		a += (c ^ (b | ~d)) + x8 + 0x6fa87e4f;
		a = b + (a << 6 | a >>> 26);
		d += (b ^ (a | ~c)) + x15 + 0xfe2ce6e0;
		d = a + (d << 10 | d >>> 22);
		c += (a ^ (d | ~b)) + x6 + 0xa3014314;
		c = d + (c << 15 | c >>> 17);
		b += (d ^ (c | ~a)) + x13 + 0x4e0811a1;
		b = c + (b << 21 | b >>> 11);
		a += (c ^ (b | ~d)) + x4 + 0xf7537e82;
		a = b + (a << 6 | a >>> 26);
		d += (b ^ (a | ~c)) + x11 + 0xbd3af235;
		d = a + (d << 10 | d >>> 22);
		c += (a ^ (d | ~b)) + x2 + 0x2ad7d2bb;
		c = d + (c << 15 | c >>> 17);
		b += (d ^ (c | ~a)) + x9 + 0xeb86d391;
		b = c + (b << 21 | b >>> 11);
		h0 += a;
		h1 += b;
		h2 += c;
		h3 += d;
	}

	public void reset()
	{
		h0 = 0x67452301;
		h1 = 0xefcdab89;
		h2 = 0x98badcfe;
		h3 = 0x10325476;
		length = 0;
		finalBuffer.clear();
	}

	private void completeFinalBuffer(ByteBuffer buffer)
	{
		if (finalBuffer.position() == 0)
			return;
		for (; buffer.remaining() > 0 && finalBuffer.remaining() > 0; finalBuffer.put(buffer.get()));
		if (finalBuffer.remaining() == 0)
		{
			finalBuffer.position(0);
			transform(finalBuffer);
			finalBuffer.position(0);
		}
	}

	public void update(ByteBuffer buffer)
	{
		length += buffer.remaining();
		int position = buffer.position();
		completeFinalBuffer(buffer);
		for (; buffer.remaining() >= 64; transform(buffer));
		if (buffer.remaining() != 0)
			finalBuffer.put(buffer);
		buffer.position(position);
	}

	public byte[] digest()
	{
		byte result[] = new byte[16];
		finalBuffer.put((byte)-128);
		if (finalBuffer.remaining() < 8)
		{
			for (; finalBuffer.remaining() > 0; finalBuffer.put((byte)0));
			finalBuffer.position(0);
			transform(finalBuffer);
			finalBuffer.position(0);
		}
		for (; finalBuffer.remaining() > 8; finalBuffer.put((byte)0));
		finalBuffer.putLong(length << 3);
		finalBuffer.position(0);
		transform(finalBuffer);
		finalBuffer.position(0);
		finalBuffer.putInt(h3);
		finalBuffer.putInt(h2);
		finalBuffer.putInt(h1);
		finalBuffer.putInt(h0);
		finalBuffer.position(0);
		for (int i = 0; i < 16; i++)
			result[15 - i] = finalBuffer.get();

		return result;
	}

	public byte[] digest(ByteBuffer buffer)
	{
		update(buffer);
		return digest();
	}

	public static void main(String args[])
		throws Exception
	{
		MD5 md5Gudy = new MD5();
		BrokenMd5Hasher md5Jmule = new BrokenMd5Hasher();
		MessageDigest md5Sun = MessageDigest.getInstance("MD5");
		ByteBuffer bhashJ = ByteBuffer.allocate(16);
		System.out.println((new StringBuilder()).append("Gudy : ").append(ByteFormatter.nicePrint(md5Gudy.digest())).toString());
		md5Gudy.reset();
		md5Jmule.finalDigest(bhashJ);
		bhashJ.rewind();
		byte hashJ[] = bhashJ.array();
		System.out.println((new StringBuilder()).append("Jmule: ").append(ByteFormatter.nicePrint(hashJ)).toString());
		System.out.println((new StringBuilder()).append("Sun: ").append(ByteFormatter.nicePrint(md5Sun.digest())).toString());
		for (int i = 0; i < 1; i++)
		{
			ByteBuffer test;
			for (test = ByteBuffer.allocate(i); test.remaining() > 0; test.put((byte)(int)(Math.random() * 256D)));
			test.rewind();
			byte hashG[] = md5Gudy.digest(test);
			md5Gudy.reset();
			md5Jmule.update(test);
			bhashJ.rewind();
			md5Jmule.finalDigest(bhashJ);
			bhashJ.rewind();
			hashJ = bhashJ.array();
			test.rewind();
			md5Sun.update(test.array());
			byte hashS[] = md5Sun.digest();
			System.out.println((new StringBuilder()).append("Gudy : ").append(ByteFormatter.nicePrint(hashG)).toString());
			System.out.println((new StringBuilder()).append("Jmule: ").append(ByteFormatter.nicePrint(hashJ)).toString());
			System.out.println((new StringBuilder()).append("Sun: ").append(ByteFormatter.nicePrint(hashS)).toString());
		}

	}
}