net.sourceforge.jtds.util.MD5Digest Maven / Gradle / Ivy
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jTDS is an open source 100% pure Java (type 4) JDBC 3.0 driver
for Microsoft SQL Server (6.5, 7, 2000, 2005, 2008, 2012) and Sybase ASE
(10, 11, 12, 15). jTDS is based on FreeTDS and is currently the fastest
production-ready JDBC driver for SQL Server and Sybase. jTDS is 100% JDBC
3.0 compatible, supporting forward-only and scrollable/updateable ResultSets
and implementing all the DatabaseMetaData and ResultSetMetaData methods.
/******************************************************************************
* 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.
******************************************************************************/
package net.sourceforge.jtds.util;
/**
* 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;
}
}
}