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org.beykery.util.bip44.RIPEMD160Digest Maven / Gradle / Ivy
/*
* Copyright 2013, 2014 Megion Research & Development GmbH
*
* 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.
*/
/**
* This code was extracted from the Java cryptography library from
* www.bouncycastle.org. The code has been formatted to comply with
* the rest of the formatting in this library.
*/
package org.beykery.util.bip44;
/**
* implementation of RIPEMD see,
* http://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);
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;
}
}
}
