MD5 SOURCE CODE

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#1 AMIgosto  Icon User is offline

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MD5 SOURCE CODE

Posted 15 January 2010 - 12:28 PM

I HAVE TO IMPLEMENT AN ALGO IN JAVA ,THE SOURCE CODE OF MD5 N AM HAVING PROBLEM.. ITS NOT DETECTING THE FOLLOWING PACKAGE.
package com.Ostermiller.util;

I CANT RUN THE FOLLOWING CODE

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://www.helsinki....l/programs/md5/
* @author Stephen Ostermiller http://ostermiller.o...=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;
}
}



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Replies To: MD5 SOURCE CODE

#2 SwiftStriker00  Icon User is offline

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Re: MD5 SOURCE CODE

Posted 15 January 2010 - 12:46 PM

for god sake plz put [ code ][ /code ] tags in!

also what is the error you are receiving? or not compiling or just not doing anything?
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#3 erik.price  Icon User is offline

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Re: MD5 SOURCE CODE

Posted 15 January 2010 - 01:51 PM

Quote

PLZ RPLY


Would it really have taken you that much more time to write out those extra letters?

Also, CAPS LOCK IS NOT NEEDED! IT GETS ANNOYING TO READ TEXT THAT IS ALL LIKE THIS.

Also, it looks like you just took someone else's code and copy-pasted to do a homework assignment. :angry:

This post has been edited by erik.price: 15 January 2010 - 01:51 PM

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#4 NeoTifa  Icon User is offline

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Re: MD5 SOURCE CODE

Posted 15 January 2010 - 02:07 PM

Is the class you're trying to use in your project's package?
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#5 g00se  Icon User is online

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Re: MD5 SOURCE CODE

Posted 15 January 2010 - 04:17 PM

Why are you trying to use Ostermiller? MD5 is supported in the JDK
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#6 pbl  Icon User is offline

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Re: MD5 SOURCE CODE

Posted 15 January 2010 - 08:25 PM

What do you mean

Quote

ITS NOT DETECTING THE FOLLOWING PACKAGE.
package com.Ostermiller.util;

in which directory is your MD5.java file ?
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