MD5.java Source Code

  • MD5 Documentation and Examples
  • MD5 Javadoc
    /*
     * Copyright (C) 1996 Santeri Paavolainen, Helsinki Finland
     *
     * Copyright (C) 2007 Stu Thompson stu.comp -at- mailworks.org
     *
     * Copyright (C) 2002-2010 Stephen Ostermiller
     * http://ostermiller.org/contact.pl?regarding=Java+Utilities
     *
     * This program 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.
     *
     * This program 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.
     *
     * See LICENSE.txt for details.
     *
     * The original work by Santeri Paavolainen can be found at
     * http://santtu.iki.fi/md5/
     *
     * This Java class has been derived from the RSA Data Security, Inc. MD5
     * Message-Digest Algorithm and its reference implementation.
     */
    package com.Ostermiller.util;
    
    import java.io.*;
    
    /**
     * MD5 hash generator.
     * More information about this class is available from <a target="_top" href=
     * "http://ostermiller.org/utils/MD5.html">ostermiller.org</a>.
     * <p>
     * This class takes as input a message of arbitrary length and produces
     * as output a 128-bit "fingerprint" or "message digest" of the input.
     * It is conjectured that it is computationally infeasible to produce
     * two messages having the same message digest, or to produce any
     * message having a given pre-specified target message digest. The MD5
     * algorithm is intended for digital signature applications, where a
     * large file must be "compressed" in a secure manner before being
     * encrypted with a private (secret) key under a public-key cryptosystem
     * such as RSA.
     * <p>
     * For more information see RFC1321.
     *
     * @see MD5OutputStream
     * @see MD5InputStream
     *
     * @author Santeri Paavolainen http://santtu.iki.fi/md5/
     * @author Stephen Ostermiller http://ostermiller.org/contact.pl?regarding=Java+Utilities
     * @since ostermillerutils 1.00.00
     */
    public class MD5 {
    
    	/**
    	 * Class constructor
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public MD5 () {
    		reset();
    	}
    
    	/**
    	 * Command line program that will take files as arguments
    	 * and output the MD5 sum for each file.
    	 *
    	 * @param args command line arguments
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public static void main (String[] args){
    		if (args.length == 0){
    			System.err.println("Please specify a file.");
    		} else {
    			for (String element: args) {
    				try {
    					System.out.println(MD5.getHashString(new File(element)) + " " + element);
    				} catch (IOException x){
    					System.err.println(x.getMessage());
    				}
    			}
    		}
    	}
    
    	/**
    	 * Gets this hash sum as an array of 16 bytes.
    	 *
    	 * @return Array of 16 bytes, the hash of all updated bytes.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public byte[] getHash() {
    		if (!finalState.valid) {
    			finalState.copy(workingState);
    			long bitCount = finalState.bitCount;
    			// Compute the number of left over bits
    			int leftOver = (int) (((bitCount >>> 3)) & 0x3f);
    			// Compute the amount of padding to add based on number of left over bits.
    			int padlen = (leftOver < 56) ? (56 - leftOver) : (120 - leftOver);
    			// add the padding
    			update(finalState, padding, 0, padlen);
    			// add the length (computed before padding was added)
    			update(finalState, encode(bitCount), 0, 8);
    			finalState.valid = true;
    		}
    		// make a copy of the hash before returning it.
    		return encode(finalState.state, 16);
    	}
    
    	/**
    	 * Returns 32-character hex representation of this hash.
    	 *
    	 * @return String representation of this object's hash.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public String getHashString(){
    		return toHex(this.getHash());
    	}
    
    	/**
    	 * Gets the MD5 hash of the given byte array.
    	 *
    	 * @param b byte array for which an MD5 hash is desired.
    	 * @return Array of 16 bytes, the hash of all updated bytes.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public static byte[] getHash(byte[] b){
    		MD5 md5 = new MD5();
    		md5.update(b);
    		return md5.getHash();
    	}
    
    	/**
    	 * Gets the MD5 hash of the given byte array.
    	 *
    	 * @param b byte array for which an MD5 hash is desired.
    	 * @return 32-character hex representation the data's MD5 hash.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public static String getHashString(byte[] b){
    		MD5 md5 = new MD5();
    		md5.update(b);
    		return md5.getHashString();
    	}
    
    	/**
    	 * Gets the MD5 hash the data on the given InputStream.
    	 *
    	 * @param in byte array for which an MD5 hash is desired.
    	 * @return Array of 16 bytes, the hash of all updated bytes.
    	 * @throws IOException if an I/O error occurs.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public static byte[] getHash(InputStream in) throws IOException {
    		MD5 md5 = new MD5();
    		byte[] buffer = new byte[1024];
    		int read;
    		while ((read = in.read(buffer)) != -1){
    			md5.update(buffer, read);
    		}
    		return md5.getHash();
    	}
    
    	/**
    	 * Gets the MD5 hash the data on the given InputStream.
    	 *
    	 * @param in byte array for which an MD5 hash is desired.
    	 * @return 32-character hex representation the data's MD5 hash.
    	 * @throws IOException if an I/O error occurs.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public static String getHashString(InputStream in) throws IOException {
    		MD5 md5 = new MD5();
    		byte[] buffer = new byte[1024];
    		int read;
    		while ((read = in.read(buffer)) != -1){
    			md5.update(buffer, read);
    		}
    		return md5.getHashString();
    	}
    
    	/**
    	 * Gets the MD5 hash of the given file.
    	 *
    	 * @param f file for which an MD5 hash is desired.
    	 * @return Array of 16 bytes, the hash of all updated bytes.
    	 * @throws IOException if an I/O error occurs.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public static byte[] getHash(File f) throws IOException {
    		InputStream is = new FileInputStream(f);
    		byte[] hash = getHash(is);
    		is.close();
    		return hash;
    	}
    
    	/**
    	 * Gets the MD5 hash of the given file.
    	 *
    	 * @param f file array for which an MD5 hash is desired.
    	 * @return 32-character hex representation the data's MD5 hash.
    	 * @throws IOException if an I/O error occurs.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public static String getHashString(File f) throws IOException {
    		InputStream is = new FileInputStream(f);
    		String hash = getHashString(is);
    		is.close();
    		return hash;
    	}
    
    	/**
    	 * Gets the MD5 hash of the given String.
    	 * The string is converted to bytes using the current
    	 * platform's default character encoding.
    	 *
    	 * @param s String for which an MD5 hash is desired.
    	 * @return Array of 16 bytes, the hash of all updated bytes.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public static byte[] getHash(String s){
    		MD5 md5 = new MD5();
    		md5.update(s);
    		return md5.getHash();
    	}
    
    	/**
    	 * Gets the MD5 hash of the given String.
    	 * The string is converted to bytes using the current
    	 * platform's default character encoding.
    	 *
    	 * @param s String for which an MD5 hash is desired.
    	 * @return 32-character hex representation the data's MD5 hash.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public static String getHashString(String s){
    		MD5 md5 = new MD5();
    		md5.update(s);
    		return md5.getHashString();
    	}
    
    
    	/**
    	 * Gets the MD5 hash of the given String.
    	 *
    	 * @param s String for which an MD5 hash is desired.
    	 * @param enc The name of a supported character encoding.
    	 * @return Array of 16 bytes, the hash of all updated bytes.
    	 * @throws UnsupportedEncodingException If the named encoding is not supported.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public static byte[] getHash(String s, String enc) throws UnsupportedEncodingException {
    		MD5 md5 = new MD5();
    		md5.update(s, enc);
    		return md5.getHash();
    	}
    
    	/**
    	 * Gets the MD5 hash of the given String.
    	 *
    	 * @param s String for which an MD5 hash is desired.
    	 * @param enc The name of a supported character encoding.
    	 * @return 32-character hex representation the data's MD5 hash.
    	 * @throws UnsupportedEncodingException If the named encoding is not supported.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public static String getHashString(String s, String enc) throws UnsupportedEncodingException {
    		MD5 md5 = new MD5();
    		md5.update(s, enc);
    		return md5.getHashString();
    	}
    
    
    	/**
    	 * Reset the MD5 sum to its initial state.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public void reset() {
    		workingState.reset();
    		finalState.valid = false;
    	}
    
    	/**
    	 * Returns 32-character hex representation of this hash.
    	 *
    	 * @return String representation of this object's hash.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	@Override public String toString(){
    		return getHashString();
    	}
    
    	/**
    	 * Update this hash with the given data.
    	 * <p>
    	 * A state may be passed into this method so that we can add padding
    	 * and finalize a md5 hash without limiting our ability to update
    	 * more data later.
    	 * <p>
    	 * If length bytes are not available to be hashed, as many bytes as
    	 * possible will be hashed.
    	 *
    	 * @param state Which state is updated.
    	 * @param buffer Array of bytes to be hashed.
    	 * @param offset Offset to buffer array.
    	 * @param length number of bytes to hash.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	private void update (MD5State state, byte buffer[], int offset, int length) {
    
    		finalState.valid = false;
    
    		// if length goes beyond the end of the buffer, cut it short.
    		if ((length + offset) > buffer.length){
    			length = buffer.length - offset;
    		}
    
    		// compute number of bytes mod 64
    		// this is what we have sitting in a buffer
    		// that have not been hashed yet
    		int index = (int) (state.bitCount >>> 3) & 0x3f;
    
    		// add the length to the count (translate bytes to bits)
    		state.bitCount += length << 3;
    
    		int partlen = 64 - index;
    
    		int i = 0;
    		if (length >= partlen) {
    			System.arraycopy(buffer, offset, state.buffer, index, partlen);
    			transform(state, decode(state.buffer, 64, 0));
    			for (i = partlen; (i + 63) < length; i+= 64){
    				transform(state, decode(buffer, 64, i));
    			}
    			index = 0;
    		}
    
    		// buffer remaining input
    		if (i < length) {
    			for (int start = i; i < length; i++) {
    				state.buffer[index + i - start] = buffer[i + offset];
    			}
    		}
    	}
    
    	/**
    	 * Update this hash with the given data.
    	 * <p>
    	 * If length bytes are not available to be hashed, as many bytes as
    	 * possible will be hashed.
    	 *
    	 * @param buffer Array of bytes to be hashed.
    	 * @param offset Offset to buffer array.
    	 * @param length number of bytes to hash.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public void update (byte buffer[], int offset, int length) {
    		update(workingState, buffer, offset, length);
    	}
    
    	/**
    	 * Update this hash with the given data.
    	 * <p>
    	 * If length bytes are not available to be hashed, as many bytes as
    	 * possible will be hashed.
    	 *
    	 * @param buffer Array of bytes to be hashed.
    	 * @param length number of bytes to hash.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public void update (byte buffer[], int length) {
    		update(buffer, 0, length);
    	}
    
    	/**
    	 * Update this hash with the given data.
    	 *
    	 * @param buffer Array of bytes to be hashed.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public void update (byte buffer[]) {
    		update(buffer, 0, buffer.length);
    	}
    
    	/**
    	 * Updates this hash with a single byte.
    	 *
    	 * @param b byte to be hashed.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public void update (byte b) {
    		byte buffer[] = new byte[1];
    		buffer[0] = b;
    		update(buffer, 1);
    	}
    
    	/**
    	 * Update this hash with a String.
    	 * The string is converted to bytes using the current
    	 * platform's default character encoding.
    	 *
    	 * @param s String to be hashed.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public void update (String s) {
    		update(s.getBytes());
    	}
    
    	/**
    	 * Update this hash with a String.
    	 *
    	 * @param s String to be hashed.
    	 * @param enc The name of a supported character encoding.
    	 * @throws UnsupportedEncodingException If the named encoding is not supported.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	public void update (String s, String enc) throws UnsupportedEncodingException {
    		update(s.getBytes(enc));
    	}
    
    	/**
    	 * The current state from which the hash sum
    	 * can be computed or updated.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	private MD5State workingState = new MD5State();
    
    	/**
    	 * Cached copy of the final MD5 hash sum.  This is created when
    	 * the hash is requested and it is invalidated when the hash
    	 * is updated.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	private MD5State finalState = new MD5State();
    
    	/**
    	 * Temporary buffer cached here for performance reasons.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	private int[] decodeBuffer = new int[16];
    
    	/**
    	 * 64 bytes of padding that can be added if the length
    	 * is not divisible by 64.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	private static final byte padding[] = {
    		(byte) 0x80, 0, 0, 0, 0, 0, 0, 0,
    				0, 0, 0, 0, 0, 0, 0, 0,
    				0, 0, 0, 0, 0, 0, 0, 0,
    				0, 0, 0, 0, 0, 0, 0, 0,
    				0, 0, 0, 0, 0, 0, 0, 0,
    				0, 0, 0, 0, 0, 0, 0, 0,
    				0, 0, 0, 0, 0, 0, 0, 0,
    				0, 0, 0, 0, 0, 0, 0, 0,
    	};
    
    	/**
    	 * Contains internal state of the MD5 class.
    	 * Passes MD5 test suite as defined in RFC1321.
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	private class MD5State {
    
    		/**
    		 * True if this state is valid.
    		 *
    		 * @since ostermillerutils 1.00.00
    		 */
    		private boolean valid = true;
    
    		/**
    		 * Reset to initial state.
    		 *
    		 * @since ostermillerutils 1.00.00
    		 */
    		private void reset(){
    			state[0] = 0x67452301;
    			state[1] = 0xefcdab89;
    			state[2] = 0x98badcfe;
    			state[3] = 0x10325476;
    
    			bitCount = 0;
    		}
    
    		/**
    		 * 128-byte state
    		 *
    		 * @since ostermillerutils 1.00.00
    		 */
    		private int state[] = new int[4];
    
    		/**
    		 * 64-bit count of the number of bits that have been hashed.
    		 *
    		 * @since ostermillerutils 1.00.00
    		 */
    		private long bitCount;
    
    		/**
    		 * 64-byte buffer (512 bits) for storing to-be-hashed characters
    		 *
    		 * @since ostermillerutils 1.00.00
    		 */
    		private byte buffer[] = new byte[64];
    
    		private MD5State() {
    			reset();
    		}
    
    		/**
    		 * Set this state to be exactly the same as some other.
    		 *
    		 * @param from state to copy from.
    		 *
    		 * @since ostermillerutils 1.00.00
    		 */
    		private void copy(MD5State from) {
    			System.arraycopy(from.buffer, 0, this.buffer, 0, this.buffer.length);
    			System.arraycopy(from.state, 0, this.state, 0, this.state.length);
    			this.valid = from.valid;
    			this.bitCount = from.bitCount;
    		}
    	}
    
    
    	/**
    	 * Turns array of bytes into string representing each byte as
    	 * a two digit unsigned hex number.
    	 *
    	 * @param hash Array of bytes to convert to hex-string
    	 * @return  Generated hex string
    	 *
    	 * @since ostermillerutils 1.00.00
    	 */
    	private static String toHex(byte hash[]){
    		StringBuffer buf = new StringBuffer(hash.length * 2);
    		for (byte element: hash) {
    			int intVal = element & 0xff;
    			if (intVal < 0x10){
    				// append a zero before a one digit hex
    				// number to make it two digits.
    				buf.append("0");
    			}
    			buf.append(Integer.toHexString(intVal));
    		}
    		return buf.toString();
    	}
    
    	private static int FF (int a, int b, int c, int d, int x, int s, int ac) {
    		a += ((b & c) | (~b & d));
    		a += x;
    		a += ac;
    		//return rotateLeft(a, s) + b;
    		a = (a << s) | (a >>> (32 - s));
    		return a + b;
    	}
    
    	private static int GG (int a, int b, int c, int d, int x, int s, int ac) {
    		a += ((b & d) | (c & ~d));
    		a += x;
    		a += ac;
    		//return rotateLeft(a, s) + b;
    		a = (a << s) | (a >>> (32 - s));
    		return a + b;
    	}
    
    	private static int HH (int a, int b, int c, int d, int x, int s, int ac) {
    		a += (b ^ c ^ d);
    		a += x;
    		a += ac;
    		//return rotateLeft(a, s) + b;
    		a = (a << s) | (a >>> (32 - s));
    		return a + b;
    	}
    
    	private static int II (int a, int b, int c, int d, int x, int s, int ac) {
    		a += (c ^ (b | ~d));
    		a += x;
    		a += ac;
    		//return rotateLeft(a, s) + b;
    		a = (a << s) | (a >>> (32 - s));
    		return a + b;
    	}
    
    	private static byte[] encode(long l){
    		byte[] out = new byte[8];
    		out[0] = (byte) (l & 0xff);
    		out[1] = (byte) ((l >>> 8) & 0xff);
    		out[2] = (byte) ((l >>> 16) & 0xff);
    		out[3] = (byte) ((l >>> 24) & 0xff);
    		out[4] = (byte) ((l >>> 32) & 0xff);
    		out[5] = (byte) ((l >>> 40) & 0xff);
    		out[6] = (byte) ((l >>> 48) & 0xff);
    		out[7] = (byte) ((l >>> 56) & 0xff);
    		return out;
    	}
    
    	private static byte[] encode(int input[], int len){
    		byte[] out = new byte[len];
    		int i, j;
    		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;
    	}
    
    	private int[] decode(byte buffer[], int len, int offset){
    		int i, j;
    		for (i = j = 0; j < len; i++, j += 4) {
    			decodeBuffer[i] = (
    				(buffer[j + offset] & 0xff)) |
    				(((buffer[j + 1 + offset] & 0xff)) << 8) |
    				(((buffer[j + 2 + offset] & 0xff)) << 16) |
    				(((buffer[j + 3 + offset] & 0xff)) << 24
    			);
    		}
    		return decodeBuffer;
    	}
    
    	private static void transform(MD5State state, int[] x){
    		int a = state.state[0];
    		int b = state.state[1];
    		int c = state.state[2];
    		int d = state.state[3];
    
    		/* Round 1 */
    		a = FF (a, b, c, d, x[ 0],   7, 0xd76aa478); /* 1 */
    		d = FF (d, a, b, c, x[ 1],  12, 0xe8c7b756); /* 2 */
    		c = FF (c, d, a, b, x[ 2],  17, 0x242070db); /* 3 */
    		b = FF (b, c, d, a, x[ 3],  22, 0xc1bdceee); /* 4 */
    		a = FF (a, b, c, d, x[ 4],   7, 0xf57c0faf); /* 5 */
    		d = FF (d, a, b, c, x[ 5],  12, 0x4787c62a); /* 6 */
    		c = FF (c, d, a, b, x[ 6],  17, 0xa8304613); /* 7 */
    		b = FF (b, c, d, a, x[ 7],  22, 0xfd469501); /* 8 */
    		a = FF (a, b, c, d, x[ 8],   7, 0x698098d8); /* 9 */
    		d = FF (d, a, b, c, x[ 9],  12, 0x8b44f7af); /* 10 */
    		c = FF (c, d, a, b, x[10],  17, 0xffff5bb1); /* 11 */
    		b = FF (b, c, d, a, x[11],  22, 0x895cd7be); /* 12 */
    		a = FF (a, b, c, d, x[12],   7, 0x6b901122); /* 13 */
    		d = FF (d, a, b, c, x[13],  12, 0xfd987193); /* 14 */
    		c = FF (c, d, a, b, x[14],  17, 0xa679438e); /* 15 */
    		b = FF (b, c, d, a, x[15],  22, 0x49b40821); /* 16 */
    
    		/* Round 2 */
    		a = GG (a, b, c, d, x[ 1],   5, 0xf61e2562); /* 17 */
    		d = GG (d, a, b, c, x[ 6],   9, 0xc040b340); /* 18 */
    		c = GG (c, d, a, b, x[11],  14, 0x265e5a51); /* 19 */
    		b = GG (b, c, d, a, x[ 0],  20, 0xe9b6c7aa); /* 20 */
    		a = GG (a, b, c, d, x[ 5],   5, 0xd62f105d); /* 21 */
    		d = GG (d, a, b, c, x[10],   9, 0x02441453); /* 22 */
    		c = GG (c, d, a, b, x[15],  14, 0xd8a1e681); /* 23 */
    		b = GG (b, c, d, a, x[ 4],  20, 0xe7d3fbc8); /* 24 */
    		a = GG (a, b, c, d, x[ 9],   5, 0x21e1cde6); /* 25 */
    		d = GG (d, a, b, c, x[14],   9, 0xc33707d6); /* 26 */
    		c = GG (c, d, a, b, x[ 3],  14, 0xf4d50d87); /* 27 */
    		b = GG (b, c, d, a, x[ 8],  20, 0x455a14ed); /* 28 */
    		a = GG (a, b, c, d, x[13],   5, 0xa9e3e905); /* 29 */
    		d = GG (d, a, b, c, x[ 2],   9, 0xfcefa3f8); /* 30 */
    		c = GG (c, d, a, b, x[ 7],  14, 0x676f02d9); /* 31 */
    		b = GG (b, c, d, a, x[12],  20, 0x8d2a4c8a); /* 32 */
    
    		/* Round 3 */
    		a = HH (a, b, c, d, x[ 5],   4, 0xfffa3942); /* 33 */
    		d = HH (d, a, b, c, x[ 8],  11, 0x8771f681); /* 34 */
    		c = HH (c, d, a, b, x[11],  16, 0x6d9d6122); /* 35 */
    		b = HH (b, c, d, a, x[14],  23, 0xfde5380c); /* 36 */
    		a = HH (a, b, c, d, x[ 1],   4, 0xa4beea44); /* 37 */
    		d = HH (d, a, b, c, x[ 4],  11, 0x4bdecfa9); /* 38 */
    		c = HH (c, d, a, b, x[ 7],  16, 0xf6bb4b60); /* 39 */
    		b = HH (b, c, d, a, x[10],  23, 0xbebfbc70); /* 40 */
    		a = HH (a, b, c, d, x[13],   4, 0x289b7ec6); /* 41 */
    		d = HH (d, a, b, c, x[ 0],  11, 0xeaa127fa); /* 42 */
    		c = HH (c, d, a, b, x[ 3],  16, 0xd4ef3085); /* 43 */
    		b = HH (b, c, d, a, x[ 6],  23, 0x04881d05); /* 44 */
    		a = HH (a, b, c, d, x[ 9],   4, 0xd9d4d039); /* 45 */
    		d = HH (d, a, b, c, x[12],  11, 0xe6db99e5); /* 46 */
    		c = HH (c, d, a, b, x[15],  16, 0x1fa27cf8); /* 47 */
    		b = HH (b, c, d, a, x[ 2],  23, 0xc4ac5665); /* 48 */
    
    		/* Round 4 */
    		a = II (a, b, c, d, x[ 0],   6, 0xf4292244); /* 49 */
    		d = II (d, a, b, c, x[ 7],  10, 0x432aff97); /* 50 */
    		c = II (c, d, a, b, x[14],  15, 0xab9423a7); /* 51 */
    		b = II (b, c, d, a, x[ 5],  21, 0xfc93a039); /* 52 */
    		a = II (a, b, c, d, x[12],   6, 0x655b59c3); /* 53 */
    		d = II (d, a, b, c, x[ 3],  10, 0x8f0ccc92); /* 54 */
    		c = II (c, d, a, b, x[10],  15, 0xffeff47d); /* 55 */
    		b = II (b, c, d, a, x[ 1],  21, 0x85845dd1); /* 56 */
    		a = II (a, b, c, d, x[ 8],   6, 0x6fa87e4f); /* 57 */
    		d = II (d, a, b, c, x[15],  10, 0xfe2ce6e0); /* 58 */
    		c = II (c, d, a, b, x[ 6],  15, 0xa3014314); /* 59 */
    		b = II (b, c, d, a, x[13],  21, 0x4e0811a1); /* 60 */
    		a = II (a, b, c, d, x[ 4],   6, 0xf7537e82); /* 61 */
    		d = II (d, a, b, c, x[11],  10, 0xbd3af235); /* 62 */
    		c = II (c, d, a, b, x[ 2],  15, 0x2ad7d2bb); /* 63 */
    		b = II (b, c, d, a, x[ 9],  21, 0xeb86d391); /* 64 */
    
    		state.state[0] += a;
    		state.state[1] += b;
    		state.state[2] += c;
    		state.state[3] += d;
    	}
    }