Java/Security/Message Digest
Версия от 18:01, 31 мая 2010; (обсуждение)
Содержание
Create a checksum
import java.io.FileInputStream;
import java.io.InputStream;
import java.security.MessageDigest;
public class Main {
public static void main(String args[]) throws Exception {
InputStream fis = new FileInputStream("a.exe");
byte[] buffer = new byte[1024];
MessageDigest complete = MessageDigest.getInstance("MD5");
int numRead;
do {
numRead = fis.read(buffer);
if (numRead > 0) {
complete.update(buffer, 0, numRead);
}
} while (numRead != -1);
fis.close();
byte[] b = complete.digest();
String result = "";
for (int i = 0; i < b.length; i++) {
result += Integer.toString((b[i] & 0xff) + 0x100, 16).substring(1);
}
System.out.println(result);
}
}
Digest string
import java.io.IOException;
import java.security.GeneralSecurityException;
import java.security.MessageDigest;
public class Utils {
public static String digest(String token) throws GeneralSecurityException, IOException {
MessageDigest sha1 = MessageDigest.getInstance("SHA1");
return byteArrayToHexStr(sha1.digest(token.getBytes("UTF-8")));
}
private static String byteArrayToHexStr(byte[] data) {
char[] chars = new char[data.length * 2];
for (int i = 0; i < data.length; i++) {
byte current = data[i];
int hi = (current & 0xF0) >> 4;
int lo = current & 0x0F;
chars[2 * i] = (char) (hi < 10 ? ("0" + hi) : ("A" + hi - 10));
chars[2 * i + 1] = (char) (lo < 10 ? ("0" + lo) : ("A" + lo - 10));
}
return new String(chars);
}
}
Implements the MD4 message digest algorithm in Java
// This file is currently unlocked (change this line if you lock the file)
//
// $Log: MD4.java,v $
// Revision 1.2 1998/01/05 03:41:19 iang
// Added references only.
//
// Revision 1.1.1.1 1997/11/03 22:36:56 hopwood
// + Imported to CVS (tagged as "start").
//
// Revision 0.1.0.0 1997/07/14 R. Naffah
// + original version
//
// $Endlog$
/*
* Copyright (c) 1997 Systemics Ltd
* on behalf of the Cryptix Development Team. All rights reserved.
*/
import java.security.MessageDigest;
/**
* Implements the MD4 message digest algorithm in Java.
* <p>
* <b>References:</b>
* <ol>
* <li> Ronald L. Rivest,
* "",
* IETF RFC-1320 (informational).
* </ol>
*
* <p><b>$Revision: 1.2 $</b>
* @author Raif S. Naffah
*/
public class MD4 extends MessageDigest implements Cloneable
{
// MD4 specific object variables
//...........................................................................
/**
* The size in bytes of the input block to the tranformation algorithm.
*/
private static final int BLOCK_LENGTH = 64; // = 512 / 8;
/**
* 4 32-bit words (interim result)
*/
private int[] context = new int[4];
/**
* Number of bytes processed so far mod. 2 power of 64.
*/
private long count;
/**
* 512 bits input buffer = 16 x 32-bit words holds until reaches 512 bits.
*/
private byte[] buffer = new byte[BLOCK_LENGTH];
/**
* 512 bits work buffer = 16 x 32-bit words
*/
private int[] X = new int[16];
// Constructors
//...........................................................................
public MD4 () {
super("MD4");
engineReset();
}
/**
* This constructor is here to implement cloneability of this class.
*/
private MD4 (MD4 md) {
this();
context = (int[])md.context.clone();
buffer = (byte[])md.buffer.clone();
count = md.count;
}
// Cloneable method implementation
//...........................................................................
/**
* Returns a copy of this MD object.
*/
public Object clone() { return new MD4(this); }
// JCE methods
//...........................................................................
/**
* Resets this object disregarding any temporary data present at the
* time of the invocation of this call.
*/
public void engineReset () {
// initial values of MD4 i.e. A, B, C, D
// as per rfc-1320; they are low-order byte first
context[0] = 0x67452301;
context[1] = 0xEFCDAB89;
context[2] = 0x98BADCFE;
context[3] = 0x10325476;
count = 0L;
for (int i = 0; i < BLOCK_LENGTH; i++)
buffer[i] = 0;
}
/**
* Continues an MD4 message digest using the input byte.
*/
public void engineUpdate (byte b) {
// compute number of bytes still unhashed; ie. present in buffer
int i = (int)(count % BLOCK_LENGTH);
count++; // update number of bytes
buffer[i] = b;
if (i == BLOCK_LENGTH - 1)
transform(buffer, 0);
}
/**
* MD4 block update operation.
* <p>
* Continues an MD4 message digest operation, by filling the buffer,
* transform(ing) data in 512-bit message block(s), updating the variables
* context and count, and leaving (buffering) the remaining bytes in buffer
* for the next update or finish.
*
* @param input input block
* @param offset start of meaningful bytes in input
* @param len count of bytes in input block to consider
*/
public void engineUpdate (byte[] input, int offset, int len) {
// make sure we don"t exceed input"s allocated size/length
if (offset < 0 || len < 0 || (long)offset + len > input.length)
throw new ArrayIndexOutOfBoundsException();
// compute number of bytes still unhashed; ie. present in buffer
int bufferNdx = (int)(count % BLOCK_LENGTH);
count += len; // update number of bytes
int partLen = BLOCK_LENGTH - bufferNdx;
int i = 0;
if (len >= partLen) {
System.arraycopy(input, offset, buffer, bufferNdx, partLen);
transform(buffer, 0);
for (i = partLen; i + BLOCK_LENGTH - 1 < len; i+= BLOCK_LENGTH)
transform(input, offset + i);
bufferNdx = 0;
}
// buffer remaining input
if (i < len)
System.arraycopy(input, offset + i, buffer, bufferNdx, len - i);
}
/**
* Completes the hash computation by performing final operations such
* as padding. At the return of this engineDigest, the MD engine is
* reset.
*
* @return the array of bytes for the resulting hash value.
*/
public byte[] engineDigest () {
// pad output to 56 mod 64; as RFC1320 puts it: congruent to 448 mod 512
int bufferNdx = (int)(count % BLOCK_LENGTH);
int padLen = (bufferNdx < 56) ? (56 - bufferNdx) : (120 - bufferNdx);
// padding is alwas binary 1 followed by binary 0s
byte[] tail = new byte[padLen + 8];
tail[0] = (byte)0x80;
// append length before final transform:
// save number of bits, casting the long to an array of 8 bytes
// save low-order byte first.
for (int i = 0; i < 8; i++)
tail[padLen + i] = (byte)((count * 8) >>> (8 * i));
engineUpdate(tail, 0, tail.length);
byte[] result = new byte[16];
// cast this MD4"s context (array of 4 ints) into an array of 16 bytes.
for (int i = 0; i < 4; i++)
for (int j = 0; j < 4; j++)
result[i * 4 + j] = (byte)(context[i] >>> (8 * j));
// reset the engine
engineReset();
return result;
}
// own methods
//...........................................................................
/**
* MD4 basic transformation.
* <p>
* Transforms context based on 512 bits from input block starting
* from the offset"th byte.
*
* @param block input sub-array.
* @param offset starting position of sub-array.
*/
private void transform (byte[] block, int offset) {
// encodes 64 bytes from input block into an array of 16 32-bit
// entities. Use A as a temp var.
for (int i = 0; i < 16; i++)
X[i] = (block[offset++] & 0xFF) |
(block[offset++] & 0xFF) << 8 |
(block[offset++] & 0xFF) << 16 |
(block[offset++] & 0xFF) << 24;
int A = context[0];
int B = context[1];
int C = context[2];
int D = context[3];
A = FF(A, B, C, D, X[ 0], 3);
D = FF(D, A, B, C, X[ 1], 7);
C = FF(C, D, A, B, X[ 2], 11);
B = FF(B, C, D, A, X[ 3], 19);
A = FF(A, B, C, D, X[ 4], 3);
D = FF(D, A, B, C, X[ 5], 7);
C = FF(C, D, A, B, X[ 6], 11);
B = FF(B, C, D, A, X[ 7], 19);
A = FF(A, B, C, D, X[ 8], 3);
D = FF(D, A, B, C, X[ 9], 7);
C = FF(C, D, A, B, X[10], 11);
B = FF(B, C, D, A, X[11], 19);
A = FF(A, B, C, D, X[12], 3);
D = FF(D, A, B, C, X[13], 7);
C = FF(C, D, A, B, X[14], 11);
B = FF(B, C, D, A, X[15], 19);
A = GG(A, B, C, D, X[ 0], 3);
D = GG(D, A, B, C, X[ 4], 5);
C = GG(C, D, A, B, X[ 8], 9);
B = GG(B, C, D, A, X[12], 13);
A = GG(A, B, C, D, X[ 1], 3);
D = GG(D, A, B, C, X[ 5], 5);
C = GG(C, D, A, B, X[ 9], 9);
B = GG(B, C, D, A, X[13], 13);
A = GG(A, B, C, D, X[ 2], 3);
D = GG(D, A, B, C, X[ 6], 5);
C = GG(C, D, A, B, X[10], 9);
B = GG(B, C, D, A, X[14], 13);
A = GG(A, B, C, D, X[ 3], 3);
D = GG(D, A, B, C, X[ 7], 5);
C = GG(C, D, A, B, X[11], 9);
B = GG(B, C, D, A, X[15], 13);
A = HH(A, B, C, D, X[ 0], 3);
D = HH(D, A, B, C, X[ 8], 9);
C = HH(C, D, A, B, X[ 4], 11);
B = HH(B, C, D, A, X[12], 15);
A = HH(A, B, C, D, X[ 2], 3);
D = HH(D, A, B, C, X[10], 9);
C = HH(C, D, A, B, X[ 6], 11);
B = HH(B, C, D, A, X[14], 15);
A = HH(A, B, C, D, X[ 1], 3);
D = HH(D, A, B, C, X[ 9], 9);
C = HH(C, D, A, B, X[ 5], 11);
B = HH(B, C, D, A, X[13], 15);
A = HH(A, B, C, D, X[ 3], 3);
D = HH(D, A, B, C, X[11], 9);
C = HH(C, D, A, B, X[ 7], 11);
B = HH(B, C, D, A, X[15], 15);
context[0] += A;
context[1] += B;
context[2] += C;
context[3] += D;
}
// The basic MD4 atomic functions.
private int FF (int a, int b, int c, int d, int x, int s) {
int t = a + ((b & c) | (~b & d)) + x;
return t << s | t >>> (32 - s);
}
private int GG (int a, int b, int c, int d, int x, int s) {
int t = a + ((b & (c | d)) | (c & d)) + x + 0x5A827999;
return t << s | t >>> (32 - s);
}
private int HH (int a, int b, int c, int d, int x, int s) {
int t = a + (b ^ c ^ d) + x + 0x6ED9EBA1;
return t << s | t >>> (32 - s);
}
}
MD4 Digest
/******************************************************************************
* Copyright (c) 2000 The Legion Of The Bouncy Castle (http://www.bouncycastle.org)
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
******************************************************************************/
/**
* implementation of MD4 as RFC 1320 by R. Rivest, MIT Laboratory for
* Computer Science and RSA Data Security, Inc.
* <p>
* <b>NOTE</b>: This algorithm is only included for backwards compatability
* with legacy applications, it"s not secure, don"t use it for anything new!
*
* @version $Id: MD4Digest.java,v 1.2 2004/06/27 17:00:55 bheineman Exp $
*/
public class MD4Digest extends GeneralDigest {
private static final int DIGEST_LENGTH = 16;
//
// round 1 left rotates
//
private static final int S11 = 3;
private static final int S12 = 7;
private static final int S13 = 11;
private static final int S14 = 19;
//
// round 2 left rotates
//
private static final int S21 = 3;
private static final int S22 = 5;
private static final int S23 = 9;
private static final int S24 = 13;
//
// round 3 left rotates
//
private static final int S31 = 3;
private static final int S32 = 9;
private static final int S33 = 11;
private static final int S34 = 15;
private int H1, H2, H3, H4; // IV"s
private int[] X = new int[16];
private int xOff;
/**
* Standard constructor
*/
public MD4Digest() {
reset();
}
/**
* Copy constructor. This will copy the state of the provided
* message digest.
*/
public MD4Digest(MD4Digest t) {
super(t);
H1 = t.H1;
H2 = t.H2;
H3 = t.H3;
H4 = t.H4;
System.arraycopy(t.X, 0, X, 0, t.X.length);
xOff = t.xOff;
}
public String getAlgorithmName() {
return "MD4";
}
public int getDigestSize() {
return DIGEST_LENGTH;
}
protected void processWord(byte[] in, int inOff) {
X[xOff++] = (in[inOff] & 0xff) | ((in[inOff + 1] & 0xff) << 8)
| ((in[inOff + 2] & 0xff) << 16) | ((in[inOff + 3] & 0xff) << 24);
if (xOff == 16) {
processBlock();
}
}
protected void processLength(long bitLength) {
if (xOff > 14) {
processBlock();
}
X[14] = (int)(bitLength & 0xffffffff);
X[15] = (int)(bitLength >>> 32);
}
private void unpackWord(int word, byte[] out, int outOff) {
out[outOff] = (byte)word;
out[outOff + 1] = (byte)(word >>> 8);
out[outOff + 2] = (byte)(word >>> 16);
out[outOff + 3] = (byte)(word >>> 24);
}
public int doFinal(byte[] out, int outOff) {
finish();
unpackWord(H1, out, outOff);
unpackWord(H2, out, outOff + 4);
unpackWord(H3, out, outOff + 8);
unpackWord(H4, out, outOff + 12);
reset();
return DIGEST_LENGTH;
}
/**
* reset the chaining variables to the IV values.
*/
public void reset() {
super.reset();
H1 = 0x67452301;
H2 = 0xefcdab89;
H3 = 0x98badcfe;
H4 = 0x10325476;
xOff = 0;
for (int i = 0; i != X.length; i++) {
X[i] = 0;
}
}
/*
* rotate int x left n bits.
*/
private int rotateLeft(int x, int n) {
return(x << n) | (x >>> (32 - n));
}
/*
* F, G, H and I are the basic MD4 functions.
*/
private int F(int u, int v, int w) {
return(u & v) | (~u & w);
}
private int G(int u, int v, int w) {
return(u & v) | (u & w) | (v & w);
}
private int H(int u, int v, int w) {
return u ^ v ^ w;
}
protected void processBlock() {
int a = H1;
int b = H2;
int c = H3;
int d = H4;
//
// Round 1 - F cycle, 16 times.
//
a = rotateLeft((a + F(b, c, d) + X[ 0]), S11);
d = rotateLeft((d + F(a, b, c) + X[ 1]), S12);
c = rotateLeft((c + F(d, a, b) + X[ 2]), S13);
b = rotateLeft((b + F(c, d, a) + X[ 3]), S14);
a = rotateLeft((a + F(b, c, d) + X[ 4]), S11);
d = rotateLeft((d + F(a, b, c) + X[ 5]), S12);
c = rotateLeft((c + F(d, a, b) + X[ 6]), S13);
b = rotateLeft((b + F(c, d, a) + X[ 7]), S14);
a = rotateLeft((a + F(b, c, d) + X[ 8]), S11);
d = rotateLeft((d + F(a, b, c) + X[ 9]), S12);
c = rotateLeft((c + F(d, a, b) + X[10]), S13);
b = rotateLeft((b + F(c, d, a) + X[11]), S14);
a = rotateLeft((a + F(b, c, d) + X[12]), S11);
d = rotateLeft((d + F(a, b, c) + X[13]), S12);
c = rotateLeft((c + F(d, a, b) + X[14]), S13);
b = rotateLeft((b + F(c, d, a) + X[15]), S14);
//
// Round 2 - G cycle, 16 times.
//
a = rotateLeft((a + G(b, c, d) + X[ 0] + 0x5a827999), S21);
d = rotateLeft((d + G(a, b, c) + X[ 4] + 0x5a827999), S22);
c = rotateLeft((c + G(d, a, b) + X[ 8] + 0x5a827999), S23);
b = rotateLeft((b + G(c, d, a) + X[12] + 0x5a827999), S24);
a = rotateLeft((a + G(b, c, d) + X[ 1] + 0x5a827999), S21);
d = rotateLeft((d + G(a, b, c) + X[ 5] + 0x5a827999), S22);
c = rotateLeft((c + G(d, a, b) + X[ 9] + 0x5a827999), S23);
b = rotateLeft((b + G(c, d, a) + X[13] + 0x5a827999), S24);
a = rotateLeft((a + G(b, c, d) + X[ 2] + 0x5a827999), S21);
d = rotateLeft((d + G(a, b, c) + X[ 6] + 0x5a827999), S22);
c = rotateLeft((c + G(d, a, b) + X[10] + 0x5a827999), S23);
b = rotateLeft((b + G(c, d, a) + X[14] + 0x5a827999), S24);
a = rotateLeft((a + G(b, c, d) + X[ 3] + 0x5a827999), S21);
d = rotateLeft((d + G(a, b, c) + X[ 7] + 0x5a827999), S22);
c = rotateLeft((c + G(d, a, b) + X[11] + 0x5a827999), S23);
b = rotateLeft((b + G(c, d, a) + X[15] + 0x5a827999), S24);
//
// Round 3 - H cycle, 16 times.
//
a = rotateLeft((a + H(b, c, d) + X[ 0] + 0x6ed9eba1), S31);
d = rotateLeft((d + H(a, b, c) + X[ 8] + 0x6ed9eba1), S32);
c = rotateLeft((c + H(d, a, b) + X[ 4] + 0x6ed9eba1), S33);
b = rotateLeft((b + H(c, d, a) + X[12] + 0x6ed9eba1), S34);
a = rotateLeft((a + H(b, c, d) + X[ 2] + 0x6ed9eba1), S31);
d = rotateLeft((d + H(a, b, c) + X[10] + 0x6ed9eba1), S32);
c = rotateLeft((c + H(d, a, b) + X[ 6] + 0x6ed9eba1), S33);
b = rotateLeft((b + H(c, d, a) + X[14] + 0x6ed9eba1), S34);
a = rotateLeft((a + H(b, c, d) + X[ 1] + 0x6ed9eba1), S31);
d = rotateLeft((d + H(a, b, c) + X[ 9] + 0x6ed9eba1), S32);
c = rotateLeft((c + H(d, a, b) + X[ 5] + 0x6ed9eba1), S33);
b = rotateLeft((b + H(c, d, a) + X[13] + 0x6ed9eba1), S34);
a = rotateLeft((a + H(b, c, d) + X[ 3] + 0x6ed9eba1), S31);
d = rotateLeft((d + H(a, b, c) + X[11] + 0x6ed9eba1), S32);
c = rotateLeft((c + H(d, a, b) + X[ 7] + 0x6ed9eba1), S33);
b = rotateLeft((b + H(c, d, a) + X[15] + 0x6ed9eba1), S34);
H1 += a;
H2 += b;
H3 += c;
H4 += d;
//
// reset the offset and clean out the word buffer.
//
xOff = 0;
for (int i = 0; i != X.length; i++) {
X[i] = 0;
}
}
}
/**
* base implementation of MD4 family style digest as outlined in
* "Handbook of Applied Cryptography", pages 344 - 347.
*
* @version $Id: GeneralDigest.java,v 1.2 2004/06/27 17:00:55 bheineman Exp $
*/
abstract class GeneralDigest
// implements Digest - mdb: we don"t care about this interface
{
private byte[] xBuf;
private int xBufOff;
private long byteCount;
/**
* Standard constructor
*/
protected GeneralDigest()
{
xBuf = new byte[4];
xBufOff = 0;
}
/**
* Copy constructor. We are using copy constructors in place
* of the Object.clone() interface as this interface is not
* supported by J2ME.
*/
protected GeneralDigest(GeneralDigest t)
{
xBuf = new byte[t.xBuf.length];
System.arraycopy(t.xBuf, 0, xBuf, 0, t.xBuf.length);
xBufOff = t.xBufOff;
byteCount = t.byteCount;
}
public void update(
byte in)
{
xBuf[xBufOff++] = in;
if (xBufOff == xBuf.length)
{
processWord(xBuf, 0);
xBufOff = 0;
}
byteCount++;
}
public void update(
byte[] in,
int inOff,
int len)
{
//
// fill the current word
//
while ((xBufOff != 0) && (len > 0))
{
update(in[inOff]);
inOff++;
len--;
}
//
// process whole words.
//
while (len > xBuf.length)
{
processWord(in, inOff);
inOff += xBuf.length;
len -= xBuf.length;
byteCount += xBuf.length;
}
//
// load in the remainder.
//
while (len > 0)
{
update(in[inOff]);
inOff++;
len--;
}
}
public void finish()
{
long bitLength = (byteCount << 3);
//
// add the pad bytes.
//
update((byte)128);
while (xBufOff != 0)
{
update((byte)0);
}
processLength(bitLength);
processBlock();
}
public void reset()
{
byteCount = 0;
xBufOff = 0;
for ( int i = 0; i < xBuf.length; i++ ) {
xBuf[i] = 0;
}
}
protected abstract void processWord(byte[] in, int inOff);
protected abstract void processLength(long bitLength);
protected abstract void processBlock();
}
MD5 Digest
/******************************************************************************
* Copyright (c) 2000 The Legion Of The Bouncy Castle (http://www.bouncycastle.org)
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
******************************************************************************/
/**
* implementation of MD5 as outlined in "Handbook of Applied Cryptography", pages 346 - 347.
*/
public class MD5Digest
extends GeneralDigest
{
private static final int DIGEST_LENGTH = 16;
private int H1, H2, H3, H4; // IV"s
private int[] X = new int[16];
private int xOff;
/**
* Standard constructor
*/
public MD5Digest()
{
reset();
}
/**
* Copy constructor. This will copy the state of the provided
* message digest.
*/
public MD5Digest(MD5Digest t)
{
super(t);
H1 = t.H1;
H2 = t.H2;
H3 = t.H3;
H4 = t.H4;
System.arraycopy(t.X, 0, X, 0, t.X.length);
xOff = t.xOff;
}
public String getAlgorithmName()
{
return "MD5";
}
public int getDigestSize()
{
return DIGEST_LENGTH;
}
protected void processWord(
byte[] in,
int inOff)
{
X[xOff++] = (in[inOff] & 0xff) | ((in[inOff + 1] & 0xff) << 8)
| ((in[inOff + 2] & 0xff) << 16) | ((in[inOff + 3] & 0xff) << 24);
if (xOff == 16)
{
processBlock();
}
}
protected void processLength(
long bitLength)
{
if (xOff > 14)
{
processBlock();
}
X[14] = (int)(bitLength & 0xffffffff);
X[15] = (int)(bitLength >>> 32);
}
private void unpackWord(
int word,
byte[] out,
int outOff)
{
out[outOff] = (byte)word;
out[outOff + 1] = (byte)(word >>> 8);
out[outOff + 2] = (byte)(word >>> 16);
out[outOff + 3] = (byte)(word >>> 24);
}
public int doFinal(
byte[] out,
int outOff)
{
finish();
unpackWord(H1, out, outOff);
unpackWord(H2, out, outOff + 4);
unpackWord(H3, out, outOff + 8);
unpackWord(H4, out, outOff + 12);
reset();
return DIGEST_LENGTH;
}
/**
* reset the chaining variables to the IV values.
*/
public void reset()
{
super.reset();
H1 = 0x67452301;
H2 = 0xefcdab89;
H3 = 0x98badcfe;
H4 = 0x10325476;
xOff = 0;
for (int i = 0; i != X.length; i++)
{
X[i] = 0;
}
}
//
// round 1 left rotates
//
private static final int S11 = 7;
private static final int S12 = 12;
private static final int S13 = 17;
private static final int S14 = 22;
//
// round 2 left rotates
//
private static final int S21 = 5;
private static final int S22 = 9;
private static final int S23 = 14;
private static final int S24 = 20;
//
// round 3 left rotates
//
private static final int S31 = 4;
private static final int S32 = 11;
private static final int S33 = 16;
private static final int S34 = 23;
//
// round 4 left rotates
//
private static final int S41 = 6;
private static final int S42 = 10;
private static final int S43 = 15;
private static final int S44 = 21;
/*
* rotate int x left n bits.
*/
private int rotateLeft(
int x,
int n)
{
return (x << n) | (x >>> (32 - n));
}
/*
* F, G, H and I are the basic MD5 functions.
*/
private int F(
int u,
int v,
int w)
{
return (u & v) | (~u & w);
}
private int G(
int u,
int v,
int w)
{
return (u & w) | (v & ~w);
}
private int H(
int u,
int v,
int w)
{
return u ^ v ^ w;
}
private int K(
int u,
int v,
int w)
{
return v ^ (u | ~w);
}
protected void processBlock()
{
int a = H1;
int b = H2;
int c = H3;
int d = H4;
//
// Round 1 - F cycle, 16 times.
//
a = rotateLeft(a + F(b, c, d) + X[ 0] + 0xd76aa478, S11) + b;
d = rotateLeft(d + F(a, b, c) + X[ 1] + 0xe8c7b756, S12) + a;
c = rotateLeft(c + F(d, a, b) + X[ 2] + 0x242070db, S13) + d;
b = rotateLeft(b + F(c, d, a) + X[ 3] + 0xc1bdceee, S14) + c;
a = rotateLeft(a + F(b, c, d) + X[ 4] + 0xf57c0faf, S11) + b;
d = rotateLeft(d + F(a, b, c) + X[ 5] + 0x4787c62a, S12) + a;
c = rotateLeft(c + F(d, a, b) + X[ 6] + 0xa8304613, S13) + d;
b = rotateLeft(b + F(c, d, a) + X[ 7] + 0xfd469501, S14) + c;
a = rotateLeft(a + F(b, c, d) + X[ 8] + 0x698098d8, S11) + b;
d = rotateLeft(d + F(a, b, c) + X[ 9] + 0x8b44f7af, S12) + a;
c = rotateLeft(c + F(d, a, b) + X[10] + 0xffff5bb1, S13) + d;
b = rotateLeft(b + F(c, d, a) + X[11] + 0x895cd7be, S14) + c;
a = rotateLeft(a + F(b, c, d) + X[12] + 0x6b901122, S11) + b;
d = rotateLeft(d + F(a, b, c) + X[13] + 0xfd987193, S12) + a;
c = rotateLeft(c + F(d, a, b) + X[14] + 0xa679438e, S13) + d;
b = rotateLeft(b + F(c, d, a) + X[15] + 0x49b40821, S14) + c;
//
// Round 2 - G cycle, 16 times.
//
a = rotateLeft(a + G(b, c, d) + X[ 1] + 0xf61e2562, S21) + b;
d = rotateLeft(d + G(a, b, c) + X[ 6] + 0xc040b340, S22) + a;
c = rotateLeft(c + G(d, a, b) + X[11] + 0x265e5a51, S23) + d;
b = rotateLeft(b + G(c, d, a) + X[ 0] + 0xe9b6c7aa, S24) + c;
a = rotateLeft(a + G(b, c, d) + X[ 5] + 0xd62f105d, S21) + b;
d = rotateLeft(d + G(a, b, c) + X[10] + 0x02441453, S22) + a;
c = rotateLeft(c + G(d, a, b) + X[15] + 0xd8a1e681, S23) + d;
b = rotateLeft(b + G(c, d, a) + X[ 4] + 0xe7d3fbc8, S24) + c;
a = rotateLeft(a + G(b, c, d) + X[ 9] + 0x21e1cde6, S21) + b;
d = rotateLeft(d + G(a, b, c) + X[14] + 0xc33707d6, S22) + a;
c = rotateLeft(c + G(d, a, b) + X[ 3] + 0xf4d50d87, S23) + d;
b = rotateLeft(b + G(c, d, a) + X[ 8] + 0x455a14ed, S24) + c;
a = rotateLeft(a + G(b, c, d) + X[13] + 0xa9e3e905, S21) + b;
d = rotateLeft(d + G(a, b, c) + X[ 2] + 0xfcefa3f8, S22) + a;
c = rotateLeft(c + G(d, a, b) + X[ 7] + 0x676f02d9, S23) + d;
b = rotateLeft(b + G(c, d, a) + X[12] + 0x8d2a4c8a, S24) + c;
//
// Round 3 - H cycle, 16 times.
//
a = rotateLeft(a + H(b, c, d) + X[ 5] + 0xfffa3942, S31) + b;
d = rotateLeft(d + H(a, b, c) + X[ 8] + 0x8771f681, S32) + a;
c = rotateLeft(c + H(d, a, b) + X[11] + 0x6d9d6122, S33) + d;
b = rotateLeft(b + H(c, d, a) + X[14] + 0xfde5380c, S34) + c;
a = rotateLeft(a + H(b, c, d) + X[ 1] + 0xa4beea44, S31) + b;
d = rotateLeft(d + H(a, b, c) + X[ 4] + 0x4bdecfa9, S32) + a;
c = rotateLeft(c + H(d, a, b) + X[ 7] + 0xf6bb4b60, S33) + d;
b = rotateLeft(b + H(c, d, a) + X[10] + 0xbebfbc70, S34) + c;
a = rotateLeft(a + H(b, c, d) + X[13] + 0x289b7ec6, S31) + b;
d = rotateLeft(d + H(a, b, c) + X[ 0] + 0xeaa127fa, S32) + a;
c = rotateLeft(c + H(d, a, b) + X[ 3] + 0xd4ef3085, S33) + d;
b = rotateLeft(b + H(c, d, a) + X[ 6] + 0x04881d05, S34) + c;
a = rotateLeft(a + H(b, c, d) + X[ 9] + 0xd9d4d039, S31) + b;
d = rotateLeft(d + H(a, b, c) + X[12] + 0xe6db99e5, S32) + a;
c = rotateLeft(c + H(d, a, b) + X[15] + 0x1fa27cf8, S33) + d;
b = rotateLeft(b + H(c, d, a) + X[ 2] + 0xc4ac5665, S34) + c;
//
// Round 4 - K cycle, 16 times.
//
a = rotateLeft(a + K(b, c, d) + X[ 0] + 0xf4292244, S41) + b;
d = rotateLeft(d + K(a, b, c) + X[ 7] + 0x432aff97, S42) + a;
c = rotateLeft(c + K(d, a, b) + X[14] + 0xab9423a7, S43) + d;
b = rotateLeft(b + K(c, d, a) + X[ 5] + 0xfc93a039, S44) + c;
a = rotateLeft(a + K(b, c, d) + X[12] + 0x655b59c3, S41) + b;
d = rotateLeft(d + K(a, b, c) + X[ 3] + 0x8f0ccc92, S42) + a;
c = rotateLeft(c + K(d, a, b) + X[10] + 0xffeff47d, S43) + d;
b = rotateLeft(b + K(c, d, a) + X[ 1] + 0x85845dd1, S44) + c;
a = rotateLeft(a + K(b, c, d) + X[ 8] + 0x6fa87e4f, S41) + b;
d = rotateLeft(d + K(a, b, c) + X[15] + 0xfe2ce6e0, S42) + a;
c = rotateLeft(c + K(d, a, b) + X[ 6] + 0xa3014314, S43) + d;
b = rotateLeft(b + K(c, d, a) + X[13] + 0x4e0811a1, S44) + c;
a = rotateLeft(a + K(b, c, d) + X[ 4] + 0xf7537e82, S41) + b;
d = rotateLeft(d + K(a, b, c) + X[11] + 0xbd3af235, S42) + a;
c = rotateLeft(c + K(d, a, b) + X[ 2] + 0x2ad7d2bb, S43) + d;
b = rotateLeft(b + K(c, d, a) + X[ 9] + 0xeb86d391, S44) + c;
H1 += a;
H2 += b;
H3 += c;
H4 += d;
//
// reset the offset and clean out the word buffer.
//
xOff = 0;
for (int i = 0; i != X.length; i++)
{
X[i] = 0;
}
}
}
/**
* base implementation of MD4 family style digest as outlined in
* "Handbook of Applied Cryptography", pages 344 - 347.
*
* @version $Id: GeneralDigest.java,v 1.2 2004/06/27 17:00:55 bheineman Exp $
*/
abstract class GeneralDigest
// implements Digest - mdb: we don"t care about this interface
{
private byte[] xBuf;
private int xBufOff;
private long byteCount;
/**
* Standard constructor
*/
protected GeneralDigest()
{
xBuf = new byte[4];
xBufOff = 0;
}
/**
* Copy constructor. We are using copy constructors in place
* of the Object.clone() interface as this interface is not
* supported by J2ME.
*/
protected GeneralDigest(GeneralDigest t)
{
xBuf = new byte[t.xBuf.length];
System.arraycopy(t.xBuf, 0, xBuf, 0, t.xBuf.length);
xBufOff = t.xBufOff;
byteCount = t.byteCount;
}
public void update(
byte in)
{
xBuf[xBufOff++] = in;
if (xBufOff == xBuf.length)
{
processWord(xBuf, 0);
xBufOff = 0;
}
byteCount++;
}
public void update(
byte[] in,
int inOff,
int len)
{
//
// fill the current word
//
while ((xBufOff != 0) && (len > 0))
{
update(in[inOff]);
inOff++;
len--;
}
//
// process whole words.
//
while (len > xBuf.length)
{
processWord(in, inOff);
inOff += xBuf.length;
len -= xBuf.length;
byteCount += xBuf.length;
}
//
// load in the remainder.
//
while (len > 0)
{
update(in[inOff]);
inOff++;
len--;
}
}
public void finish()
{
long bitLength = (byteCount << 3);
//
// add the pad bytes.
//
update((byte)128);
while (xBufOff != 0)
{
update((byte)0);
}
processLength(bitLength);
processBlock();
}
public void reset()
{
byteCount = 0;
xBufOff = 0;
for ( int i = 0; i < xBuf.length; i++ ) {
xBuf[i] = 0;
}
}
protected abstract void processWord(byte[] in, int inOff);
protected abstract void processLength(long bitLength);
protected abstract void processBlock();
}
MessageDigest with SHA-1
import java.security.MessageDigest;
import java.security.Security;
public class MainClass {
public static void main(String args[]) throws Exception {
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
MessageDigest sha = MessageDigest.getInstance("SHA-1");
byte[] data1 = {65,66,67,68,69};
sha.update(data1);
byte[] msgDigest = sha.digest();
System.out.println("--- Message Digest ---");
for(int i=0; i<msgDigest.length; i++) {
System.out.print(msgDigest[i] + " ");
}
}
}
Operations to simplifiy common java.security.MessageDigest tasks.
/*
* Copyright 2001-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* Operations to simplifiy common {@link java.security.MessageDigest} tasks.
* This class is thread safe.
*
* @author Apache Software Foundation
*/
public class DigestUtils {
/**
* Returns a MessageDigest for the given <code>algorithm</code>.
*
* @param algorithm
* The MessageDigest algorithm name.
* @return An MD5 digest instance.
* @throws RuntimeException
* when a {@link java.security.NoSuchAlgorithmException} is caught,
*/
static MessageDigest getDigest(String algorithm) {
try {
return MessageDigest.getInstance(algorithm);
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException(e.getMessage());
}
}
/**
* Returns an MD5 MessageDigest.
*
* @return An MD5 digest instance.
* @throws RuntimeException
* when a {@link java.security.NoSuchAlgorithmException} is caught,
*/
private static MessageDigest getMd5Digest() {
return getDigest("MD5");
}
/**
* Returns an SHA digest.
*
* @return An SHA digest instance.
* @throws RuntimeException
* when a {@link java.security.NoSuchAlgorithmException} is caught,
*/
private static MessageDigest getShaDigest() {
return getDigest("SHA");
}
/**
* Calculates the MD5 digest and returns the value as a 16 element
* <code>byte[]</code>.
*
* @param data
* Data to digest
* @return MD5 digest
*/
public static byte[] md5(byte[] data) {
return getMd5Digest().digest(data);
}
/**
* Calculates the MD5 digest and returns the value as a 16 element
* <code>byte[]</code>.
*
* @param data
* Data to digest
* @return MD5 digest
*/
public static byte[] md5(String data) {
return md5(data.getBytes());
}
/**
* Calculates the MD5 digest and returns the value as a 32 character hex
* string.
*
* @param data
* Data to digest
* @return MD5 digest as a hex string
*/
public static String md5Hex(byte[] data) {
return new String(Hex.encodeHex(md5(data)));
}
/**
* Calculates the MD5 digest and returns the value as a 32 character hex
* string.
*
* @param data
* Data to digest
* @return MD5 digest as a hex string
*/
public static String md5Hex(String data) {
return new String(Hex.encodeHex(md5(data)));
}
/**
* Calculates the SHA digest and returns the value as a <code>byte[]</code>.
*
* @param data
* Data to digest
* @return SHA digest
*/
public static byte[] sha(byte[] data) {
return getShaDigest().digest(data);
}
/**
* Calculates the SHA digest and returns the value as a <code>byte[]</code>.
*
* @param data
* Data to digest
* @return SHA digest
*/
public static byte[] sha(String data) {
return sha(data.getBytes());
}
/**
* Calculates the SHA digest and returns the value as a hex string.
*
* @param data
* Data to digest
* @return SHA digest as a hex string
*/
public static String shaHex(byte[] data) {
return new String(Hex.encodeHex(sha(data)));
}
/**
* Calculates the SHA digest and returns the value as a hex string.
*
* @param data
* Data to digest
* @return SHA digest as a hex string
*/
public static String shaHex(String data) {
return new String(Hex.encodeHex(sha(data)));
}
}
/*
* Copyright 2001-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
/**
* Hex encoder and decoder.
*
* @since 1.1
* @author Apache Software Foundation
* @version $Id: Hex.java,v 1.13 2004/04/18 18:22:33 ggregory Exp $
*/
class Hex {
/**
* Used building output as Hex
*/
private static final char[] DIGITS = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a",
"b", "c", "d", "e", "f" };
/**
* Converts an array of characters representing hexidecimal values into an
* array of bytes of those same values. The returned array will be half the
* length of the passed array, as it takes two characters to represent any
* given byte. An exception is thrown if the passed char array has an odd
* number of elements.
*
* @param data
* An array of characters containing hexidecimal digits
* @return A byte array containing binary data decoded from the supplied char
* array.
* @throws DecoderException
* Thrown if an odd number or illegal of characters is supplied
*/
public static byte[] decodeHex(char[] data) throws RuntimeException {
int len = data.length;
if ((len & 0x01) != 0) {
throw new RuntimeException("Odd number of characters.");
}
byte[] out = new byte[len >> 1];
// two characters form the hex value.
for (int i = 0, j = 0; j < len; i++) {
int f = toDigit(data[j], j) << 4;
j++;
f = f | toDigit(data[j], j);
j++;
out[i] = (byte) (f & 0xFF);
}
return out;
}
/**
* Converts a hexadecimal character to an integer.
*
* @param ch
* A character to convert to an integer digit
* @param index
* The index of the character in the source
* @return An integer
* @throws DecoderException
* Thrown if ch is an illegal hex character
*/
protected static int toDigit(char ch, int index) throws RuntimeException {
int digit = Character.digit(ch, 16);
if (digit == -1) {
throw new RuntimeException("Illegal hexadecimal charcter " + ch + " at index " + index);
}
return digit;
}
/**
* Converts an array of bytes into an array of characters representing the
* hexidecimal values of each byte in order. The returned array will be double
* the length of the passed array, as it takes two characters to represent any
* given byte.
*
* @param data
* a byte[] to convert to Hex characters
* @return A char[] containing hexidecimal characters
*/
public static char[] encodeHex(byte[] data) {
int l = data.length;
char[] out = new char[l << 1];
// two characters form the hex value.
for (int i = 0, j = 0; i < l; i++) {
out[j++] = DIGITS[(0xF0 & data[i]) >>> 4];
out[j++] = DIGITS[0x0F & data[i]];
}
return out;
}
/**
* Converts an array of character bytes representing hexidecimal values into
* an array of bytes of those same values. The returned array will be half the
* length of the passed array, as it takes two characters to represent any
* given byte. An exception is thrown if the passed char array has an odd
* number of elements.
*
* @param array
* An array of character bytes containing hexidecimal digits
* @return A byte array containing binary data decoded from the supplied byte
* array (representing characters).
* @throws DecoderException
* Thrown if an odd number of characters is supplied to this
* function
* @see #decodeHex(char[])
*/
public byte[] decode(byte[] array) throws RuntimeException {
return decodeHex(new String(array).toCharArray());
}
/**
* Converts a String or an array of character bytes representing hexidecimal
* values into an array of bytes of those same values. The returned array will
* be half the length of the passed String or array, as it takes two
* characters to represent any given byte. An exception is thrown if the
* passed char array has an odd number of elements.
*
* @param object
* A String or, an array of character bytes containing hexidecimal
* digits
* @return A byte array containing binary data decoded from the supplied byte
* array (representing characters).
* @throws DecoderException
* Thrown if an odd number of characters is supplied to this
* function or the object is not a String or char[]
* @see #decodeHex(char[])
*/
public Object decode(Object object) throws RuntimeException {
try {
char[] charArray = object instanceof String ? ((String) object).toCharArray()
: (char[]) object;
return decodeHex(charArray);
} catch (ClassCastException e) {
throw new RuntimeException(e.getMessage());
}
}
/**
* Converts an array of bytes into an array of bytes for the characters
* representing the hexidecimal values of each byte in order. The returned
* array will be double the length of the passed array, as it takes two
* characters to represent any given byte.
*
* @param array
* a byte[] to convert to Hex characters
* @return A byte[] containing the bytes of the hexidecimal characters
* @see #encodeHex(byte[])
*/
public byte[] encode(byte[] array) {
return new String(encodeHex(array)).getBytes();
}
/**
* Converts a String or an array of bytes into an array of characters
* representing the hexidecimal values of each byte in order. The returned
* array will be double the length of the passed String or array, as it takes
* two characters to represent any given byte.
*
* @param object
* a String, or byte[] to convert to Hex characters
* @return A char[] containing hexidecimal characters
* @throws EncoderException
* Thrown if the given object is not a String or byte[]
* @see #encodeHex(byte[])
*/
public Object encode(Object object) throws Exception {
try {
byte[] byteArray = object instanceof String ? ((String) object).getBytes() : (byte[]) object;
return encodeHex(byteArray);
} catch (ClassCastException e) {
throw new RuntimeException(e.getMessage());
}
}
}
