org.bouncycastle.crypto.digests.RIPEMD160Digest Maven / Gradle / Ivy
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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 and up.
package org.bouncycastle.crypto.digests;
import org.bouncycastle.util.Memoable;
/**
* implementation of RIPEMD see,
* https://www.esat.kuleuven.ac.be/~bosselae/ripemd160.html
*/
public class RIPEMD160Digest
extends GeneralDigest
{
private static final int DIGEST_LENGTH = 20;
private int H0, H1, H2, H3, H4; // IV's
private int[] X = new int[16];
private int xOff;
/**
* Standard constructor
*/
public RIPEMD160Digest()
{
reset();
}
/**
* Copy constructor. This will copy the state of the provided
* message digest.
*/
public RIPEMD160Digest(RIPEMD160Digest t)
{
super(t);
copyIn(t);
}
private void copyIn(RIPEMD160Digest t)
{
super.copyIn(t);
H0 = t.H0;
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 "RIPEMD160";
}
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(H0, out, outOff);
unpackWord(H1, out, outOff + 4);
unpackWord(H2, out, outOff + 8);
unpackWord(H3, out, outOff + 12);
unpackWord(H4, out, outOff + 16);
reset();
return DIGEST_LENGTH;
}
/**
* reset the chaining variables to the IV values.
*/
public void reset()
{
super.reset();
H0 = 0x67452301;
H1 = 0xefcdab89;
H2 = 0x98badcfe;
H3 = 0x10325476;
H4 = 0xc3d2e1f0;
xOff = 0;
for (int i = 0; i != X.length; i++)
{
X[i] = 0;
}
}
/*
* rotate int x left n bits.
*/
private int RL(
int x,
int n)
{
return (x << n) | (x >>> (32 - n));
}
/*
* f1,f2,f3,f4,f5 are the basic RIPEMD160 functions.
*/
/*
* rounds 0-15
*/
private int f1(
int x,
int y,
int z)
{
return x ^ y ^ z;
}
/*
* rounds 16-31
*/
private int f2(
int x,
int y,
int z)
{
return (x & y) | (~x & z);
}
/*
* rounds 32-47
*/
private int f3(
int x,
int y,
int z)
{
return (x | ~y) ^ z;
}
/*
* rounds 48-63
*/
private int f4(
int x,
int y,
int z)
{
return (x & z) | (y & ~z);
}
/*
* rounds 64-79
*/
private int f5(
int x,
int y,
int z)
{
return x ^ (y | ~z);
}
protected void processBlock()
{
int a, aa;
int b, bb;
int c, cc;
int d, dd;
int e, ee;
a = aa = H0;
b = bb = H1;
c = cc = H2;
d = dd = H3;
e = ee = H4;
//
// Rounds 1 - 16
//
// left
a = RL(a + f1(b,c,d) + X[ 0], 11) + e; c = RL(c, 10);
e = RL(e + f1(a,b,c) + X[ 1], 14) + d; b = RL(b, 10);
d = RL(d + f1(e,a,b) + X[ 2], 15) + c; a = RL(a, 10);
c = RL(c + f1(d,e,a) + X[ 3], 12) + b; e = RL(e, 10);
b = RL(b + f1(c,d,e) + X[ 4], 5) + a; d = RL(d, 10);
a = RL(a + f1(b,c,d) + X[ 5], 8) + e; c = RL(c, 10);
e = RL(e + f1(a,b,c) + X[ 6], 7) + d; b = RL(b, 10);
d = RL(d + f1(e,a,b) + X[ 7], 9) + c; a = RL(a, 10);
c = RL(c + f1(d,e,a) + X[ 8], 11) + b; e = RL(e, 10);
b = RL(b + f1(c,d,e) + X[ 9], 13) + a; d = RL(d, 10);
a = RL(a + f1(b,c,d) + X[10], 14) + e; c = RL(c, 10);
e = RL(e + f1(a,b,c) + X[11], 15) + d; b = RL(b, 10);
d = RL(d + f1(e,a,b) + X[12], 6) + c; a = RL(a, 10);
c = RL(c + f1(d,e,a) + X[13], 7) + b; e = RL(e, 10);
b = RL(b + f1(c,d,e) + X[14], 9) + a; d = RL(d, 10);
a = RL(a + f1(b,c,d) + X[15], 8) + e; c = RL(c, 10);
// right
aa = RL(aa + f5(bb,cc,dd) + X[ 5] + 0x50a28be6, 8) + ee; cc = RL(cc, 10);
ee = RL(ee + f5(aa,bb,cc) + X[14] + 0x50a28be6, 9) + dd; bb = RL(bb, 10);
dd = RL(dd + f5(ee,aa,bb) + X[ 7] + 0x50a28be6, 9) + cc; aa = RL(aa, 10);
cc = RL(cc + f5(dd,ee,aa) + X[ 0] + 0x50a28be6, 11) + bb; ee = RL(ee, 10);
bb = RL(bb + f5(cc,dd,ee) + X[ 9] + 0x50a28be6, 13) + aa; dd = RL(dd, 10);
aa = RL(aa + f5(bb,cc,dd) + X[ 2] + 0x50a28be6, 15) + ee; cc = RL(cc, 10);
ee = RL(ee + f5(aa,bb,cc) + X[11] + 0x50a28be6, 15) + dd; bb = RL(bb, 10);
dd = RL(dd + f5(ee,aa,bb) + X[ 4] + 0x50a28be6, 5) + cc; aa = RL(aa, 10);
cc = RL(cc + f5(dd,ee,aa) + X[13] + 0x50a28be6, 7) + bb; ee = RL(ee, 10);
bb = RL(bb + f5(cc,dd,ee) + X[ 6] + 0x50a28be6, 7) + aa; dd = RL(dd, 10);
aa = RL(aa + f5(bb,cc,dd) + X[15] + 0x50a28be6, 8) + ee; cc = RL(cc, 10);
ee = RL(ee + f5(aa,bb,cc) + X[ 8] + 0x50a28be6, 11) + dd; bb = RL(bb, 10);
dd = RL(dd + f5(ee,aa,bb) + X[ 1] + 0x50a28be6, 14) + cc; aa = RL(aa, 10);
cc = RL(cc + f5(dd,ee,aa) + X[10] + 0x50a28be6, 14) + bb; ee = RL(ee, 10);
bb = RL(bb + f5(cc,dd,ee) + X[ 3] + 0x50a28be6, 12) + aa; dd = RL(dd, 10);
aa = RL(aa + f5(bb,cc,dd) + X[12] + 0x50a28be6, 6) + ee; cc = RL(cc, 10);
//
// Rounds 16-31
//
// left
e = RL(e + f2(a,b,c) + X[ 7] + 0x5a827999, 7) + d; b = RL(b, 10);
d = RL(d + f2(e,a,b) + X[ 4] + 0x5a827999, 6) + c; a = RL(a, 10);
c = RL(c + f2(d,e,a) + X[13] + 0x5a827999, 8) + b; e = RL(e, 10);
b = RL(b + f2(c,d,e) + X[ 1] + 0x5a827999, 13) + a; d = RL(d, 10);
a = RL(a + f2(b,c,d) + X[10] + 0x5a827999, 11) + e; c = RL(c, 10);
e = RL(e + f2(a,b,c) + X[ 6] + 0x5a827999, 9) + d; b = RL(b, 10);
d = RL(d + f2(e,a,b) + X[15] + 0x5a827999, 7) + c; a = RL(a, 10);
c = RL(c + f2(d,e,a) + X[ 3] + 0x5a827999, 15) + b; e = RL(e, 10);
b = RL(b + f2(c,d,e) + X[12] + 0x5a827999, 7) + a; d = RL(d, 10);
a = RL(a + f2(b,c,d) + X[ 0] + 0x5a827999, 12) + e; c = RL(c, 10);
e = RL(e + f2(a,b,c) + X[ 9] + 0x5a827999, 15) + d; b = RL(b, 10);
d = RL(d + f2(e,a,b) + X[ 5] + 0x5a827999, 9) + c; a = RL(a, 10);
c = RL(c + f2(d,e,a) + X[ 2] + 0x5a827999, 11) + b; e = RL(e, 10);
b = RL(b + f2(c,d,e) + X[14] + 0x5a827999, 7) + a; d = RL(d, 10);
a = RL(a + f2(b,c,d) + X[11] + 0x5a827999, 13) + e; c = RL(c, 10);
e = RL(e + f2(a,b,c) + X[ 8] + 0x5a827999, 12) + d; b = RL(b, 10);
// right
ee = RL(ee + f4(aa,bb,cc) + X[ 6] + 0x5c4dd124, 9) + dd; bb = RL(bb, 10);
dd = RL(dd + f4(ee,aa,bb) + X[11] + 0x5c4dd124, 13) + cc; aa = RL(aa, 10);
cc = RL(cc + f4(dd,ee,aa) + X[ 3] + 0x5c4dd124, 15) + bb; ee = RL(ee, 10);
bb = RL(bb + f4(cc,dd,ee) + X[ 7] + 0x5c4dd124, 7) + aa; dd = RL(dd, 10);
aa = RL(aa + f4(bb,cc,dd) + X[ 0] + 0x5c4dd124, 12) + ee; cc = RL(cc, 10);
ee = RL(ee + f4(aa,bb,cc) + X[13] + 0x5c4dd124, 8) + dd; bb = RL(bb, 10);
dd = RL(dd + f4(ee,aa,bb) + X[ 5] + 0x5c4dd124, 9) + cc; aa = RL(aa, 10);
cc = RL(cc + f4(dd,ee,aa) + X[10] + 0x5c4dd124, 11) + bb; ee = RL(ee, 10);
bb = RL(bb + f4(cc,dd,ee) + X[14] + 0x5c4dd124, 7) + aa; dd = RL(dd, 10);
aa = RL(aa + f4(bb,cc,dd) + X[15] + 0x5c4dd124, 7) + ee; cc = RL(cc, 10);
ee = RL(ee + f4(aa,bb,cc) + X[ 8] + 0x5c4dd124, 12) + dd; bb = RL(bb, 10);
dd = RL(dd + f4(ee,aa,bb) + X[12] + 0x5c4dd124, 7) + cc; aa = RL(aa, 10);
cc = RL(cc + f4(dd,ee,aa) + X[ 4] + 0x5c4dd124, 6) + bb; ee = RL(ee, 10);
bb = RL(bb + f4(cc,dd,ee) + X[ 9] + 0x5c4dd124, 15) + aa; dd = RL(dd, 10);
aa = RL(aa + f4(bb,cc,dd) + X[ 1] + 0x5c4dd124, 13) + ee; cc = RL(cc, 10);
ee = RL(ee + f4(aa,bb,cc) + X[ 2] + 0x5c4dd124, 11) + dd; bb = RL(bb, 10);
//
// Rounds 32-47
//
// left
d = RL(d + f3(e,a,b) + X[ 3] + 0x6ed9eba1, 11) + c; a = RL(a, 10);
c = RL(c + f3(d,e,a) + X[10] + 0x6ed9eba1, 13) + b; e = RL(e, 10);
b = RL(b + f3(c,d,e) + X[14] + 0x6ed9eba1, 6) + a; d = RL(d, 10);
a = RL(a + f3(b,c,d) + X[ 4] + 0x6ed9eba1, 7) + e; c = RL(c, 10);
e = RL(e + f3(a,b,c) + X[ 9] + 0x6ed9eba1, 14) + d; b = RL(b, 10);
d = RL(d + f3(e,a,b) + X[15] + 0x6ed9eba1, 9) + c; a = RL(a, 10);
c = RL(c + f3(d,e,a) + X[ 8] + 0x6ed9eba1, 13) + b; e = RL(e, 10);
b = RL(b + f3(c,d,e) + X[ 1] + 0x6ed9eba1, 15) + a; d = RL(d, 10);
a = RL(a + f3(b,c,d) + X[ 2] + 0x6ed9eba1, 14) + e; c = RL(c, 10);
e = RL(e + f3(a,b,c) + X[ 7] + 0x6ed9eba1, 8) + d; b = RL(b, 10);
d = RL(d + f3(e,a,b) + X[ 0] + 0x6ed9eba1, 13) + c; a = RL(a, 10);
c = RL(c + f3(d,e,a) + X[ 6] + 0x6ed9eba1, 6) + b; e = RL(e, 10);
b = RL(b + f3(c,d,e) + X[13] + 0x6ed9eba1, 5) + a; d = RL(d, 10);
a = RL(a + f3(b,c,d) + X[11] + 0x6ed9eba1, 12) + e; c = RL(c, 10);
e = RL(e + f3(a,b,c) + X[ 5] + 0x6ed9eba1, 7) + d; b = RL(b, 10);
d = RL(d + f3(e,a,b) + X[12] + 0x6ed9eba1, 5) + c; a = RL(a, 10);
// right
dd = RL(dd + f3(ee,aa,bb) + X[15] + 0x6d703ef3, 9) + cc; aa = RL(aa, 10);
cc = RL(cc + f3(dd,ee,aa) + X[ 5] + 0x6d703ef3, 7) + bb; ee = RL(ee, 10);
bb = RL(bb + f3(cc,dd,ee) + X[ 1] + 0x6d703ef3, 15) + aa; dd = RL(dd, 10);
aa = RL(aa + f3(bb,cc,dd) + X[ 3] + 0x6d703ef3, 11) + ee; cc = RL(cc, 10);
ee = RL(ee + f3(aa,bb,cc) + X[ 7] + 0x6d703ef3, 8) + dd; bb = RL(bb, 10);
dd = RL(dd + f3(ee,aa,bb) + X[14] + 0x6d703ef3, 6) + cc; aa = RL(aa, 10);
cc = RL(cc + f3(dd,ee,aa) + X[ 6] + 0x6d703ef3, 6) + bb; ee = RL(ee, 10);
bb = RL(bb + f3(cc,dd,ee) + X[ 9] + 0x6d703ef3, 14) + aa; dd = RL(dd, 10);
aa = RL(aa + f3(bb,cc,dd) + X[11] + 0x6d703ef3, 12) + ee; cc = RL(cc, 10);
ee = RL(ee + f3(aa,bb,cc) + X[ 8] + 0x6d703ef3, 13) + dd; bb = RL(bb, 10);
dd = RL(dd + f3(ee,aa,bb) + X[12] + 0x6d703ef3, 5) + cc; aa = RL(aa, 10);
cc = RL(cc + f3(dd,ee,aa) + X[ 2] + 0x6d703ef3, 14) + bb; ee = RL(ee, 10);
bb = RL(bb + f3(cc,dd,ee) + X[10] + 0x6d703ef3, 13) + aa; dd = RL(dd, 10);
aa = RL(aa + f3(bb,cc,dd) + X[ 0] + 0x6d703ef3, 13) + ee; cc = RL(cc, 10);
ee = RL(ee + f3(aa,bb,cc) + X[ 4] + 0x6d703ef3, 7) + dd; bb = RL(bb, 10);
dd = RL(dd + f3(ee,aa,bb) + X[13] + 0x6d703ef3, 5) + cc; aa = RL(aa, 10);
//
// Rounds 48-63
//
// left
c = RL(c + f4(d,e,a) + X[ 1] + 0x8f1bbcdc, 11) + b; e = RL(e, 10);
b = RL(b + f4(c,d,e) + X[ 9] + 0x8f1bbcdc, 12) + a; d = RL(d, 10);
a = RL(a + f4(b,c,d) + X[11] + 0x8f1bbcdc, 14) + e; c = RL(c, 10);
e = RL(e + f4(a,b,c) + X[10] + 0x8f1bbcdc, 15) + d; b = RL(b, 10);
d = RL(d + f4(e,a,b) + X[ 0] + 0x8f1bbcdc, 14) + c; a = RL(a, 10);
c = RL(c + f4(d,e,a) + X[ 8] + 0x8f1bbcdc, 15) + b; e = RL(e, 10);
b = RL(b + f4(c,d,e) + X[12] + 0x8f1bbcdc, 9) + a; d = RL(d, 10);
a = RL(a + f4(b,c,d) + X[ 4] + 0x8f1bbcdc, 8) + e; c = RL(c, 10);
e = RL(e + f4(a,b,c) + X[13] + 0x8f1bbcdc, 9) + d; b = RL(b, 10);
d = RL(d + f4(e,a,b) + X[ 3] + 0x8f1bbcdc, 14) + c; a = RL(a, 10);
c = RL(c + f4(d,e,a) + X[ 7] + 0x8f1bbcdc, 5) + b; e = RL(e, 10);
b = RL(b + f4(c,d,e) + X[15] + 0x8f1bbcdc, 6) + a; d = RL(d, 10);
a = RL(a + f4(b,c,d) + X[14] + 0x8f1bbcdc, 8) + e; c = RL(c, 10);
e = RL(e + f4(a,b,c) + X[ 5] + 0x8f1bbcdc, 6) + d; b = RL(b, 10);
d = RL(d + f4(e,a,b) + X[ 6] + 0x8f1bbcdc, 5) + c; a = RL(a, 10);
c = RL(c + f4(d,e,a) + X[ 2] + 0x8f1bbcdc, 12) + b; e = RL(e, 10);
// right
cc = RL(cc + f2(dd,ee,aa) + X[ 8] + 0x7a6d76e9, 15) + bb; ee = RL(ee, 10);
bb = RL(bb + f2(cc,dd,ee) + X[ 6] + 0x7a6d76e9, 5) + aa; dd = RL(dd, 10);
aa = RL(aa + f2(bb,cc,dd) + X[ 4] + 0x7a6d76e9, 8) + ee; cc = RL(cc, 10);
ee = RL(ee + f2(aa,bb,cc) + X[ 1] + 0x7a6d76e9, 11) + dd; bb = RL(bb, 10);
dd = RL(dd + f2(ee,aa,bb) + X[ 3] + 0x7a6d76e9, 14) + cc; aa = RL(aa, 10);
cc = RL(cc + f2(dd,ee,aa) + X[11] + 0x7a6d76e9, 14) + bb; ee = RL(ee, 10);
bb = RL(bb + f2(cc,dd,ee) + X[15] + 0x7a6d76e9, 6) + aa; dd = RL(dd, 10);
aa = RL(aa + f2(bb,cc,dd) + X[ 0] + 0x7a6d76e9, 14) + ee; cc = RL(cc, 10);
ee = RL(ee + f2(aa,bb,cc) + X[ 5] + 0x7a6d76e9, 6) + dd; bb = RL(bb, 10);
dd = RL(dd + f2(ee,aa,bb) + X[12] + 0x7a6d76e9, 9) + cc; aa = RL(aa, 10);
cc = RL(cc + f2(dd,ee,aa) + X[ 2] + 0x7a6d76e9, 12) + bb; ee = RL(ee, 10);
bb = RL(bb + f2(cc,dd,ee) + X[13] + 0x7a6d76e9, 9) + aa; dd = RL(dd, 10);
aa = RL(aa + f2(bb,cc,dd) + X[ 9] + 0x7a6d76e9, 12) + ee; cc = RL(cc, 10);
ee = RL(ee + f2(aa,bb,cc) + X[ 7] + 0x7a6d76e9, 5) + dd; bb = RL(bb, 10);
dd = RL(dd + f2(ee,aa,bb) + X[10] + 0x7a6d76e9, 15) + cc; aa = RL(aa, 10);
cc = RL(cc + f2(dd,ee,aa) + X[14] + 0x7a6d76e9, 8) + bb; ee = RL(ee, 10);
//
// Rounds 64-79
//
// left
b = RL(b + f5(c,d,e) + X[ 4] + 0xa953fd4e, 9) + a; d = RL(d, 10);
a = RL(a + f5(b,c,d) + X[ 0] + 0xa953fd4e, 15) + e; c = RL(c, 10);
e = RL(e + f5(a,b,c) + X[ 5] + 0xa953fd4e, 5) + d; b = RL(b, 10);
d = RL(d + f5(e,a,b) + X[ 9] + 0xa953fd4e, 11) + c; a = RL(a, 10);
c = RL(c + f5(d,e,a) + X[ 7] + 0xa953fd4e, 6) + b; e = RL(e, 10);
b = RL(b + f5(c,d,e) + X[12] + 0xa953fd4e, 8) + a; d = RL(d, 10);
a = RL(a + f5(b,c,d) + X[ 2] + 0xa953fd4e, 13) + e; c = RL(c, 10);
e = RL(e + f5(a,b,c) + X[10] + 0xa953fd4e, 12) + d; b = RL(b, 10);
d = RL(d + f5(e,a,b) + X[14] + 0xa953fd4e, 5) + c; a = RL(a, 10);
c = RL(c + f5(d,e,a) + X[ 1] + 0xa953fd4e, 12) + b; e = RL(e, 10);
b = RL(b + f5(c,d,e) + X[ 3] + 0xa953fd4e, 13) + a; d = RL(d, 10);
a = RL(a + f5(b,c,d) + X[ 8] + 0xa953fd4e, 14) + e; c = RL(c, 10);
e = RL(e + f5(a,b,c) + X[11] + 0xa953fd4e, 11) + d; b = RL(b, 10);
d = RL(d + f5(e,a,b) + X[ 6] + 0xa953fd4e, 8) + c; a = RL(a, 10);
c = RL(c + f5(d,e,a) + X[15] + 0xa953fd4e, 5) + b; e = RL(e, 10);
b = RL(b + f5(c,d,e) + X[13] + 0xa953fd4e, 6) + a; d = RL(d, 10);
// right
bb = RL(bb + f1(cc,dd,ee) + X[12], 8) + aa; dd = RL(dd, 10);
aa = RL(aa + f1(bb,cc,dd) + X[15], 5) + ee; cc = RL(cc, 10);
ee = RL(ee + f1(aa,bb,cc) + X[10], 12) + dd; bb = RL(bb, 10);
dd = RL(dd + f1(ee,aa,bb) + X[ 4], 9) + cc; aa = RL(aa, 10);
cc = RL(cc + f1(dd,ee,aa) + X[ 1], 12) + bb; ee = RL(ee, 10);
bb = RL(bb + f1(cc,dd,ee) + X[ 5], 5) + aa; dd = RL(dd, 10);
aa = RL(aa + f1(bb,cc,dd) + X[ 8], 14) + ee; cc = RL(cc, 10);
ee = RL(ee + f1(aa,bb,cc) + X[ 7], 6) + dd; bb = RL(bb, 10);
dd = RL(dd + f1(ee,aa,bb) + X[ 6], 8) + cc; aa = RL(aa, 10);
cc = RL(cc + f1(dd,ee,aa) + X[ 2], 13) + bb; ee = RL(ee, 10);
bb = RL(bb + f1(cc,dd,ee) + X[13], 6) + aa; dd = RL(dd, 10);
aa = RL(aa + f1(bb,cc,dd) + X[14], 5) + ee; cc = RL(cc, 10);
ee = RL(ee + f1(aa,bb,cc) + X[ 0], 15) + dd; bb = RL(bb, 10);
dd = RL(dd + f1(ee,aa,bb) + X[ 3], 13) + cc; aa = RL(aa, 10);
cc = RL(cc + f1(dd,ee,aa) + X[ 9], 11) + bb; ee = RL(ee, 10);
bb = RL(bb + f1(cc,dd,ee) + X[11], 11) + aa; dd = RL(dd, 10);
dd += c + H1;
H1 = H2 + d + ee;
H2 = H3 + e + aa;
H3 = H4 + a + bb;
H4 = H0 + b + cc;
H0 = dd;
//
// reset the offset and clean out the word buffer.
//
xOff = 0;
for (int i = 0; i != X.length; i++)
{
X[i] = 0;
}
}
public Memoable copy()
{
return new RIPEMD160Digest(this);
}
public void reset(Memoable other)
{
RIPEMD160Digest d = (RIPEMD160Digest)other;
copyIn(d);
}
}