public static void testICDE() {
// Number of total operations
int numberOfTests = 5;
// Length of the p, note that n=p.q
int lengthp = 512;
Paillier esystem = new Paillier();
Random rd = new Random();
PaillierPrivateKey key = KeyGen.PaillierKey(lengthp, 122333356);
esystem.setDecryptEncrypt(key);
// let's test our algorithm by encrypting and decrypting few instances
long start = System.currentTimeMillis();
for (int i = 0; i < numberOfTests; i++) {
BigInteger m1 = BigInteger.valueOf(Math.abs(rd.nextLong()));
BigInteger m2 = BigInteger.valueOf(Math.abs(rd.nextLong()));
BigInteger c1 = esystem.encrypt(m1);
BigInteger c2 = esystem.encrypt(m2);
BigInteger c3 = esystem.multiply(c1, m2);
c1 = esystem.add(c1, c2);
c1 = esystem.add(c1, c3);
esystem.decrypt(c1);
}
long stop = System.currentTimeMillis();
System.out.println(
"Running time per comparison in milliseconds: " + ((stop - start) / numberOfTests));
}
/**
* Adds the time zone to the specified token builder.
*
* @param tb token builder
*/
void zone(final TokenBuilder tb) {
if (tz == Short.MAX_VALUE) return;
if (tz == 0) {
tb.add('Z');
} else {
tb.add(tz > 0 ? '+' : '-');
prefix(tb, Math.abs(tz) / 60, 2);
tb.add(':');
prefix(tb, Math.abs(tz) % 60, 2);
}
}
private int findClosestIndexOf(String context, int oldIndex, String content) {
Matcher matcher = Pattern.compile(Pattern.quote(context)).matcher(content);
int index = 0;
while (matcher.find()) {
if (Math.abs(oldIndex - matcher.start()) < (Math.abs(oldIndex - index))) {
index = matcher.start();
}
}
return index;
}
/** Dummy test method. */
public static boolean dan(Point p1, Point p2) {
// Point p1 = mech1.getLocation();
// Point p2 = mech2.getLocation();
int p1x = p1.getx();
int p1y = p1.gety();
int p2x = p2.getx();
int p2y = p2.gety();
int dx = p2x - p1x;
int dy = p2y - p1y;
int xdir = sign(dx);
int ydir = sign(dy);
// double dist = Math.sqrt(dx*dx+dy*dy);
double changex = (double) Math.abs(dx); // Diff in x
double changey = (double) Math.abs(dy); // Diff in y
double currentx = p1x;
double currenty = p1y;
int nextx = p1x;
int nexty = p1y;
double xdist, ydist;
double xcost, ycost;
int width = 5;
while ((p2x - nextx) * xdir > 0 || (p2y - nexty) * ydir > 0) {
xdist =
dist(
currentx, width,
xdir); // total distance need to encounter next terrain object in x direction
ydist = dist(currenty, width, ydir);
xcost = (changex == 0) ? 10000 : xdist / changex;
ycost = (changey == 0) ? 10000 : ydist / changey;
if (xcost <= ycost) ydist = xdist * (changey / changex);
else xdist = ydist * (changex / changey);
currentx += xdir * xdist;
currenty += ydir * ydist;
nextx = (int) round(currentx, ydir);
nexty = (int) round(currenty, ydir);
// if (Map.getNearestGrid(nextx,nexty).getType() !=0) return false;
}
System.out.println("Nextx: " + nextx + " Nexty: " + nexty);
System.out.println("Currentx: " + currentx + " Currenty: " + currenty);
return true;
}
public static int rules(
String top, Vector<String> first, Vector<String> second, Vector<String> afia) {
while (!first.isEmpty() && !second.isEmpty()) {
if (count % 2 == 0) {
boolean check = false;
for (int i = 0; i < first.size(); i++) {
check =
matcher(
top,
first.elementAt(
i)); // performs a linear search on player1's whot to see if any matches the
// top card
if (check == true) {
place.addElement(first.elementAt(i));
first.removeElementAt(i);
break;
}
}
if (check == false) {
Random rd = new Random();
int pick = Math.abs(rd.nextInt(afia.size() - 1)) % (afia.size() - 1);
first.addElement(afia.elementAt(pick));
afia.removeElementAt(pick);
}
} else {
boolean check = false;
for (int i = 0; i < second.size(); i++) {
check =
matcher(
top,
second.elementAt(
i)); // performs a linear search on player1's whot to see if any matches the
// top card
if (check == true) {
place.addElement(second.elementAt(i));
second.removeElementAt(i);
break;
}
}
if (check == false) {
Random rd = new Random();
int pick = Math.abs(rd.nextInt(afia.size() - 1)) % (afia.size() - 1);
second.addElement(afia.elementAt(pick));
afia.removeElementAt(pick);
}
}
}
return 1;
}
// BEGIN KAWIGIEDIT TESTING
// Generated by KawigiEdit-pf 2.3.0
private static boolean KawigiEdit_RunTest(
int testNum, int[] p0, int[] p1, boolean hasAnswer, double p2) {
System.out.print("Test " + testNum + ": [" + "{");
for (int i = 0; p0.length > i; ++i) {
if (i > 0) {
System.out.print(",");
}
System.out.print(p0[i]);
}
System.out.print("}" + "," + "{");
for (int i = 0; p1.length > i; ++i) {
if (i > 0) {
System.out.print(",");
}
System.out.print(p1[i]);
}
System.out.print("}");
System.out.println("]");
GreaterGame obj;
double answer;
obj = new GreaterGame();
long startTime = System.currentTimeMillis();
answer = obj.calc(p0, p1);
long endTime = System.currentTimeMillis();
boolean res;
res = true;
System.out.println("Time: " + (endTime - startTime) / 1000.0 + " seconds");
if (hasAnswer) {
System.out.println("Desired answer:");
System.out.println("\t" + p2);
}
System.out.println("Your answer:");
System.out.println("\t" + answer);
if (hasAnswer) {
res = answer == answer && Math.abs(p2 - answer) <= 1e-9 * Math.max(1.0, Math.abs(p2));
}
if (!res) {
System.out.println("DOESN'T MATCH!!!!");
} else if ((endTime - startTime) / 1000.0 >= 2) {
System.out.println("FAIL the timeout");
res = false;
} else if (hasAnswer) {
System.out.println("Match :-)");
} else {
System.out.println("OK, but is it right?");
}
System.out.println("");
return res;
}
/** Returns cost of moving specified distance in specified map grid. */
public static int getTerrainCost(MapGrid grid, int distance, int currentElevation) {
int cost = 0;
if (grid.getType() == 1) // Rough terrain cost
{
cost = cost + (distance * 2);
} else if (grid.getType() == 2) // Light woods cost
{
cost = cost + (distance * 2);
} else if (grid.getType() == 3) // Heavy woods cost
{
cost = cost + (distance * 3);
} else if ((grid.getType() == 4) && (grid.getElevation() == 1)) // Depth 1 Water cost
{
cost = cost + (distance * 2);
} else if ((grid.getType() == 4) && (grid.getElevation() >= 2)) // Depth 2+ Water cost
{
cost = cost + (distance * 4);
} else {
cost = cost + distance;
} // Clear terrain
cost = cost * grid.getSize();
if (grid.getElevation() != currentElevation) {
cost = cost + (Math.abs(grid.getElevation() - currentElevation) * 60);
} // Elevation change cost
return (cost);
}
/** Returns angle in degrees from specified origin to specified destination. */
public static int getAngle(Point origin, Point destination) // origin != destination
{
double distance = getDistance(origin, destination);
int add = 0;
int x = destination.getx() - origin.getx();
int y = origin.gety() - destination.gety(); // Java flips things around
double angleRad = Math.asin(Math.abs(y) / distance);
double angleDeg = Math.toDegrees(angleRad);
if ((x >= 0) && (y >= 0)) // Quadrant 1
{
angleDeg = angleDeg;
}
if ((x < 0) && (y > 0)) // Quadrant 2
{
angleDeg = 180 - angleDeg;
}
if ((x <= 0) && (y <= 0)) // Quadrant 3
{
angleDeg = 180 + angleDeg;
}
if ((x > 0) && (y < 0)) // Quadrant 4
{
angleDeg = 360 - angleDeg;
}
float angleFloat = Math.round(angleDeg);
int angleInt = Math.round(angleFloat);
return (angleInt);
}
/**
* Adds the time to the specified token builder.
*
* @param tb token builder
*/
final void time(final TokenBuilder tb) {
if (sec.remainder(DAYSECONDS).signum() == 0) return;
tb.add('T');
final long h = hou();
if (h != 0) {
tb.addLong(Math.abs(h));
tb.add('H');
}
final long m = min();
if (m != 0) {
tb.addLong(Math.abs(m));
tb.add('M');
}
final BigDecimal sc = sec();
if (sc.signum() == 0) return;
tb.add(Token.chopNumber(Token.token(sc.abs().toPlainString()))).add('S');
}
/** Returns distance to next map grid. */
public static double dist(double num, int width, int dir) {
// distance to next terrain square
double next = num + width * dir;
int square = (int) (round((next / width), dir)) * width;
double dist = (square - num) - dir * ((double) width / 2);
return Math.abs(dist);
}
public Fraction(BigDecimal original) {
super();
double A, C, D, X, Y, M;
C = original.doubleValue();
A = C;
D = C;
X = 1;
Y = 0;
do {
M = Y;
Y = X + Y * Math.round(C);
X = M;
if (C != Math.round(C)) {
C = 1 / (C - Math.round(C));
}
M = Math.round(D * Y);
} while (M != MathUtilities.toFix(D * Y, 10));
if ((Math.abs(M) > 100000) || (Math.abs(Y) > 100000) || (Math.abs(Y) == 1)) {
this.numerator = original;
this.denominator = BigInteger.ONE;
} else {
this.numerator =
BigDecimal.valueOf(Math.round((Math.abs(M) / M) * (Math.abs(Y) / Y) * Math.abs(M)));
this.denominator = new BigInteger(Long.toString(Math.round(Math.abs(Y))));
}
}
/**
* Adds the date to the specified token builder.
*
* @param tb token builder
*/
final void date(final TokenBuilder tb) {
tb.add('P');
final long y = yea();
if (y != 0) {
tb.addLong(Math.abs(y));
tb.add('Y');
}
final long m = mon();
if (m != 0) {
tb.addLong(Math.abs(m));
tb.add('M');
}
final long d = day();
if (d != 0) {
tb.addLong(Math.abs(d));
tb.add('D');
}
}
public static ArrayList<Vector> share(
Vector<String> allgames) { // shares the games to the players
Vector<String> play1 = new Vector<String>();
Vector<String> play2 = new Vector<String>();
ArrayList<Vector> al = new ArrayList<Vector>();
Random rd = new Random();
for (int i = 0; i < 4; i++) {
int first = Math.abs(rd.nextInt(allgames.size() - 1)) % (allgames.size());
play1.addElement(allgames.elementAt(first));
allgames.removeElementAt(first);
int second = Math.abs(rd.nextInt(allgames.size() - 1)) % (allgames.size());
play2.addElement(allgames.elementAt(second));
allgames.removeElementAt(second);
}
al.add(play1);
al.add(play2);
v = allgames;
return al;
}
private TextConstraint exactMatch(String primaryContent, TextConstraint originalConstraint)
throws NoMatchFoundException {
// find the text before the annotation
// int startPos = primaryContent.indexOf(this.beforeContext);
int startPos =
findClosestIndexOf(
this.beforeContext,
originalConstraint.getStartPos() - this.beforeContext.length(),
primaryContent);
startPos += this.beforeContext.length();
// find text after annotation
// int endPos = primaryContent.indexOf(this.afterContext);
int endPos =
findClosestIndexOf(this.afterContext, originalConstraint.getEndPos(), this.totalSelection);
if (endPos < 0 || startPos < 0) {
// search through the selected content
int positionTotal = 0;
if (this.beginSel.length() > 0 && this.endSel.length() > 0) {
int originalPosTotal =
(originalConstraint.getStartPos()
+ (originalConstraint.getEndPos() - this.endSel.length()));
// search beginning source selection, then end
// selection, respectively
int beginTotal =
findClosestIndexOf(this.beginSel, originalConstraint.getStartPos(), primaryContent);
int afterTotal =
findClosestIndexOf(
this.endSel,
(originalConstraint.getEndPos() - this.endSel.length()),
primaryContent);
positionTotal = beginTotal + afterTotal;
if (Math.abs(positionTotal - originalPosTotal) > 5) {
return null;
}
} else {
// search through total selection
positionTotal =
findClosestIndexOf(
this.totalSelection, originalConstraint.getStartPos(), primaryContent);
if (positionTotal < 0) return null;
}
}
return new TextConstraint(startPos, endPos);
}
int computeDifference() {
for (int i = 0; i < elements.length; i++) {
for (int j = i + 1; j < elements.length; j++) {
int d = Math.abs(elements[i] - elements[j]);
if (d >= maximumDifference) {
this.maximumDifference = d;
}
}
}
return this.maximumDifference;
}
private double evaluateAt(double a[], int start, double where) {
int deg = a.length - 1;
if (Math.abs(where) <= 1.0) {
double result = a[deg];
for (int i = deg - 2; i >= start; i--) result = result * where + a[i];
return result;
} else {
double result = a[0 + start];
for (int i = 1 + start; i < deg; i++) result = result / where + a[i];
return result * Math.pow(where, deg - start);
}
}
/**
* The cost of this solution is based on how well the KK algorithm would do with this
* prepartitioning scheme.
*/
public long cost() {
int i;
long[] ppseq = new long[sol.length];
for (i = 0; i < sol.length; i++) ppseq[i] = 0;
for (i = 0; i < sol.length; i++) ppseq[sol[i]] += sequence[i];
/*System.out.printf("\nProcessed sequence: ");
for (i=0; i<sol.length; i++)
System.out.printf("%d\t",ppseq[i]);
System.out.println("");*/
return Math.abs(numpartition.karmarkar_karp(ppseq, sol.length));
}
public double EVAL(
UnivariatePolynomial p, double lowerBound, double upperBound, double fl, double fu) {
// System.out.println( "EVAL on (" + lowerBound + "," + upperBound + ") |-> (" + fl + "," + fu +
// ")" );
double m = (lowerBound + upperBound) / 2.0;
double r = (upperBound - lowerBound) / 2.0;
// System.out.println( "(m,r)=("+m+","+r+")" );
if (upperBound - lowerBound < EPSILON) {
// System.out.println( "epsilon reached" );
// prevent infinite loop (e.g. for non-squarefree polynomials)
if (fl * fu < 0.0) return m;
else return m; // java.lang.Double.NaN;
}
// test for exclusion predicate: no real root in (m-r,m+r)
UnivariatePolynomial t = p.shift(m);
// System.out.println( "Taylor exp. of f(x-" + m + "): " + t );
double fm = t.getCoeff(0);
double ta[] = t.getCoeffs();
ta[0] = -Math.abs(ta[0]);
for (int i = 1; i < ta.length; ++i) ta[i] = Math.abs(ta[i]);
if (0.0 > new UnivariatePolynomial(ta).evaluateAt(r)) return java.lang.Double.NaN;
// System.out.println( "Exclusion predicate false" );
// test for inclusion predicate: exactly one real root in (m-r,m+r)
UnivariatePolynomial t_der = p.derive().shift(m);
// System.out.println( "Taylor exp. of f'(x-" + m + "): " + t_der );
double ta_der[] = t_der.getCoeffs();
ta_der[0] = -Math.abs(ta_der[0]);
for (int i = 1; i < ta_der.length; ++i) ta_der[i] = Math.abs(ta_der[i]);
if (fl * fu <= 0.0 && 0.0 > new UnivariatePolynomial(ta_der).evaluateAt(r))
return bisect(p, lowerBound, upperBound, fl, fu);
// System.out.println( "Inclusion predicate false" ); System.out.println();
// bisect
double result_left = EVAL(p, lowerBound, m, fl, fm);
if (!java.lang.Double.isNaN(result_left)) return result_left;
else return EVAL(p, m, upperBound, fm, fu);
}
public static String calculateUsual(double[] averageData, String[] month) {
int n = averageData.length;
double sum = 0;
String result = "";
for (int i = 0; i < n; i++) {
sum += averageData[i];
}
sum = sum / n;
double[] minus = new double[n];
for (int i = 0; i < n; i++) {
minus[i] = averageData[i] - sum;
minus[i] = Math.abs(minus[i] / sum);
if (minus[i] > 0.1) {
System.out.print(i + "data" + averageData[i] + ":" + minus[i]);
result = month[i] + ":";
}
}
return result;
}
/**
* Adjusts the timezone.
*
* @param zone timezone
* @param spec indicates if zone has been specified (may be {@code null})
* @param ii input info
* @throws QueryException query exception
*/
void tz(final DTDur zone, final boolean spec, final InputInfo ii) throws QueryException {
final short t;
if (spec && zone == null) {
t = Short.MAX_VALUE;
} else {
if (zone == null) {
final Calendar c = Calendar.getInstance();
t = (short) ((c.get(Calendar.ZONE_OFFSET) + c.get(Calendar.DST_OFFSET)) / 60000);
} else {
t = (short) (zone.min() + zone.hou() * 60);
if (zone.sec().signum() != 0) throw ZONESEC_X.get(ii, zone);
if (Math.abs(t) > 60 * 14 || zone.day() != 0) throw INVALZONE_X.get(ii, zone);
}
// change time if two competing time zones exist
if (tz != Short.MAX_VALUE) add(BigDecimal.valueOf(60L * (t - tz)));
}
tz = t;
}
private static double bisect(
UnivariatePolynomial p, double lowerBound, double upperBound, double fl, double fu) {
double[] a = p.getCoeffs();
assert fl * fu < 0.0 : "tried bisection on interval without sign change";
while (Math.abs(upperBound - lowerBound) > EPSILON) {
double center = 0.5 * (lowerBound + upperBound);
double fc = a[a.length - 1];
for (int i = a.length - 2; i >= 0; i--) fc = fc * center + a[i];
if (fc * fl < 0.0) {
upperBound = center;
fu = fc;
} else if (fc == 0.0) {
return center;
} else {
lowerBound = center;
fl = fc;
}
}
return lowerBound;
}
@Override
public byte[] string(final InputInfo ii) {
final TokenBuilder tb = new TokenBuilder();
final boolean ymd = yea != Long.MAX_VALUE;
if (ymd) {
if (yea <= 0) tb.add('-');
prefix(tb, Math.abs(yea()), 4);
tb.add('-');
prefix(tb, mon(), 2);
tb.add('-');
prefix(tb, day(), 2);
}
if (hou >= 0) {
if (ymd) tb.add('T');
prefix(tb, hou(), 2);
tb.add(':');
prefix(tb, min(), 2);
tb.add(':');
if (sec.intValue() < 10) tb.add('0');
tb.addExt(Token.chopNumber(Token.token(sec().abs().toPlainString())));
}
zone(tb);
return tb.finish();
}
/**
* Formats the specified number and returns a string representation.
*
* @param item item
* @param pics pictures
* @param ii input info
* @return picture variables
* @throws QueryException query exception
*/
private byte[] format(final ANum item, final Picture[] pics, final InputInfo ii)
throws QueryException {
// Rule 1: return results for NaN
final double d = item.dbl(ii);
if (Double.isNaN(d)) return nan;
// Rule 2: check if value if negative (smaller than zero or -0)
final boolean neg = d < 0 || d == 0 && Double.doubleToLongBits(d) == Long.MIN_VALUE;
final Picture pic = pics[neg && pics.length == 2 ? 1 : 0];
final IntList res = new IntList(), intgr = new IntList(), fract = new IntList();
int exp = 0;
// Rule 3: percent/permille
ANum num = item;
if (pic.pc) num = (ANum) Calc.MULT.ev(num, Int.get(100), ii);
if (pic.pm) num = (ANum) Calc.MULT.ev(num, Int.get(1000), ii);
if (Double.isInfinite(num.dbl(ii))) {
// Rule 4: infinity
intgr.add(new TokenParser(inf).toArray());
} else {
// Rule 5: exponent
if (pic.minExp != 0 && d != 0) {
BigDecimal dec = num.dec(ii).abs().stripTrailingZeros();
int scl = 0;
if (dec.compareTo(BigDecimal.ONE) >= 0) {
scl = dec.setScale(0, RoundingMode.HALF_DOWN).precision();
} else {
while (dec.compareTo(BigDecimal.ONE) < 0) {
dec = dec.multiply(BigDecimal.TEN);
scl--;
}
scl++;
}
exp = scl - pic.min[0];
if (exp != 0) {
final BigDecimal n = BigDecimal.TEN.pow(Math.abs(exp));
num = (ANum) Calc.MULT.ev(num, Dec.get(exp > 0 ? BigDecimal.ONE.divide(n) : n), ii);
}
}
num = num.round(pic.maxFrac, true).abs();
// convert positive number to string
final String s =
(num instanceof Dbl || num instanceof Flt
? Dec.get(BigDecimal.valueOf(num.dbl(ii)))
: num)
.toString();
// integer/fractional separator
final int sep = s.indexOf('.');
// create integer part
final int sl = s.length();
final int il = sep == -1 ? sl : sep;
for (int i = il; i < pic.min[0]; ++i) intgr.add(zero);
// fractional number: skip leading 0
if (!s.startsWith("0.") || pic.min[0] > 0) {
for (int i = 0; i < il; i++) intgr.add(zero + s.charAt(i) - '0');
}
// squeeze in grouping separators
if (pic.group[0].length == 1 && pic.group[0][0] > 0) {
// regular pattern with repeating separators
for (int p = intgr.size() - (neg ? 2 : 1); p > 0; --p) {
if (p % pic.group[0][0] == 0) intgr.insert(intgr.size() - p, grouping);
}
} else {
// irregular pattern, or no separators at all
final int gl = pic.group[0].length;
for (int g = 0; g < gl; ++g) {
final int pos = intgr.size() - pic.group[0][g];
if (pos > 0) intgr.insert(pos, grouping);
}
}
// create fractional part
final int fl = sep == -1 ? 0 : sl - il - 1;
if (fl != 0) for (int i = sep + 1; i < sl; i++) fract.add(zero + s.charAt(i) - '0');
for (int i = fl; i < pic.min[1]; ++i) fract.add(zero);
// squeeze in grouping separators in a reverse manner
final int ul = fract.size();
for (int p = pic.group[1].length - 1; p >= 0; p--) {
final int pos = pic.group[1][p];
if (pos < ul) fract.insert(pos, grouping);
}
}
// add minus sign
if (neg && pics.length != 2) res.add(minus);
// add prefix and integer part
res.add(pic.prefSuf[0].toArray()).add(intgr.finish());
// add fractional part
if (!fract.isEmpty()) res.add(decimal).add(fract.finish());
// add exponent
if (pic.minExp != 0) {
res.add(exponent);
if (exp < 0) res.add(minus);
final String s = Integer.toString(Math.abs(exp));
final int sl = s.length();
for (int i = sl; i < pic.minExp; i++) res.add(zero);
for (int i = 0; i < sl; i++) res.add(zero + s.charAt(i) - '0');
}
// add suffix
res.add(pic.prefSuf[1].toArray());
return new TokenBuilder(res.finish()).finish();
}
public void fire() throws IllegalActionException {
if (_state == RUNNING) {
if (alfa.isKnown() && !emmode.isKnown()) {
// if(alfa.isKnown()) {
if (alfa.hasToken(0)) {
double _alfa = ((DoubleToken) alfa.get(0)).doubleValue();
/*
if(_count > 0) { // so atualiza se um evento true deu inicio
_count++;
}*/
if (Math.abs(_alfa) >= 0.10) { // tem um evento
// _sensorCount++;
// if(_count == 0) {
// _count = 1;
// }
_count++;
} else {
_count = 0;
}
if (_count == 25) {
emmode.broadcast(new Token());
System.out.println("Entering Emergency Mode");
_reset(); // uma vez setado o emmode, so na proxima....
}
/*
if(_count == 50) { // deu os 100ms
if(_maxSensorCount >= 25 ||
_sensorCount >= 25) {
emmode.broadcast(new Token());
System.out.println("Entering Emergency Mode");
_reset(); // uma vez setado o emmode, so na proxima....
}
else {
_count = 0;
_sensorCount = 0;
_maxSensorCount = 0;
}
}
else {
if(Math.abs(_alfa) >= 0.10) { // tem um evento
_sensorCount++;
if(_count == 0) {
_count = 1;
}
}
if((Math.abs(_alfa) < 0.1) && _count > 0) { // nao tem mais , e estava contando
if(_sensorCount > _maxSensorCount) {
_maxSensorCount = _sensorCount;
}
_sensorCount = 0;
}
} */
}
}
}
if (alfa.isKnown() && !emmode.isKnown()) {
emmode.broadcastClear();
}
}
/** This main method basically tests the different features of the Paillier encryption */
public static void test() {
Random rd = new Random();
long num = 0;
long num1 = 0;
BigInteger m = null;
BigInteger c = null;
int numberOfTests = 10;
int j = 0;
BigInteger decryption = null;
Paillier esystem = new Paillier();
PaillierPrivateKey key = KeyGen.PaillierKey(512, 122333356);
esystem.setDecryptEncrypt(key);
// let's test our algorithm by encrypting and decrypting a few instances
for (int i = 0; i < numberOfTests; i++) {
num = Math.abs(rd.nextLong());
m = BigInteger.valueOf(num);
System.out.println("number chosen : " + m.toString());
c = esystem.encrypt(m);
System.out.println("encrypted value: " + c.toString());
decryption = esystem.decrypt(c);
System.out.println("decrypted value: " + decryption.toString());
if (m.compareTo(decryption) == 0) {
System.out.println("OK");
j++;
} else System.out.println("PROBLEM");
}
System.out.println(
"out of "
+ (new Integer(numberOfTests)).toString()
+ "random encryption,# many of "
+ (new Integer(j)).toString()
+ " has passed");
// Let us check the commutative properties of the paillier encryption
System.out.println("Checking the additive properteries of the Paillier encryption");
// Obviously 1+0=1
System.out.println(
"1+0="
+ (esystem.decrypt(esystem.add(esystem.encryptone(), esystem.encryptzero())))
.toString());
// 1+1=2
System.out.println(
"1+1="
+ (esystem.decrypt(
esystem.add(esystem.encrypt(BigInteger.ONE), esystem.encrypt(BigInteger.ONE))))
.toString());
// 1+1+1=3
System.out.println(
"1+1+1="
+ (esystem.decrypt(
esystem.add(
esystem.add(
esystem.encrypt(BigInteger.ONE), esystem.encrypt(BigInteger.ONE)),
esystem.encrypt(BigInteger.ONE))))
.toString());
// 0+0=0
System.out.println(
"0+0="
+ (esystem.decrypt(
esystem.add(
esystem.encrypt(BigInteger.ZERO), esystem.encrypt(BigInteger.ZERO))))
.toString());
// 1+-1=0
System.out.println(
"1+-1="
+ (esystem.decrypt(
esystem.add(
esystem.encrypt(BigInteger.valueOf(-1).mod(key.getN())),
esystem.encrypt(BigInteger.ONE))))
.toString());
do {
num = rd.nextLong();
} while (key.inModN(BigInteger.valueOf(num)) == false);
do {
num1 = rd.nextLong();
} while (key.inModN(BigInteger.valueOf(num1)) == false);
BigInteger numplusnum1 = BigInteger.valueOf(num).add(BigInteger.valueOf(num1));
BigInteger summodnsquare = numplusnum1.mod(key.getN());
// D(E(num)+E(num1))=num+num1
System.out.println(numplusnum1.toString());
System.out.println(
summodnsquare.toString()
+ "=\n"
+ esystem
.decrypt(
esystem.add(
esystem.encrypt(BigInteger.valueOf(num)),
esystem.encrypt(BigInteger.valueOf(num1))))
.toString());
// Let us check the multiplicative properties
System.out.println("Checking the multiplicative properties");
// D(multiply(E(2),3))=6
System.out.println(
"6="
+ esystem.decrypt(
esystem.multiply(
esystem.add(esystem.encrypt(BigInteger.ONE), esystem.encrypt(BigInteger.ONE)),
3)));
}
// To add/remove functions change evaluateOperator() and registration
public double evaluateFunction(String fncnam, ArgParser fncargs) throws ArithmeticException {
switch (Character.toLowerCase(fncnam.charAt(0))) {
case 'a':
{
if (fncnam.equalsIgnoreCase("abs")) {
return Math.abs(fncargs.next());
}
if (fncnam.equalsIgnoreCase("acos")) {
return Math.acos(fncargs.next());
}
if (fncnam.equalsIgnoreCase("asin")) {
return Math.asin(fncargs.next());
}
if (fncnam.equalsIgnoreCase("atan")) {
return Math.atan(fncargs.next());
}
}
break;
case 'c':
{
if (fncnam.equalsIgnoreCase("cbrt")) {
return Math.cbrt(fncargs.next());
}
if (fncnam.equalsIgnoreCase("ceil")) {
return Math.ceil(fncargs.next());
}
if (fncnam.equalsIgnoreCase("cos")) {
return Math.cos(fncargs.next());
}
if (fncnam.equalsIgnoreCase("cosh")) {
return Math.cosh(fncargs.next());
}
}
break;
case 'e':
{
if (fncnam.equalsIgnoreCase("exp")) {
return Math.exp(fncargs.next());
}
if (fncnam.equalsIgnoreCase("expm1")) {
return Math.expm1(fncargs.next());
}
}
break;
case 'f':
{
if (fncnam.equalsIgnoreCase("floor")) {
return Math.floor(fncargs.next());
}
}
break;
case 'g':
{
// if(fncnam.equalsIgnoreCase("getExponent" )) { return
// Math.getExponent(fncargs.next()); } needs Java 6
}
break;
case 'l':
{
if (fncnam.equalsIgnoreCase("log")) {
return Math.log(fncargs.next());
}
if (fncnam.equalsIgnoreCase("log10")) {
return Math.log10(fncargs.next());
}
if (fncnam.equalsIgnoreCase("log1p")) {
return Math.log1p(fncargs.next());
}
}
break;
case 'm':
{
if (fncnam.equalsIgnoreCase("max")) {
return Math.max(fncargs.next(), fncargs.next());
}
if (fncnam.equalsIgnoreCase("min")) {
return Math.min(fncargs.next(), fncargs.next());
}
}
break;
case 'n':
{
// if(fncnam.equalsIgnoreCase("nextUp" )) { return Math.nextUp
// (fncargs.next()); } needs Java 6
}
break;
case 'r':
{
if (fncnam.equalsIgnoreCase("random")) {
return Math.random();
} // impure
if (fncnam.equalsIgnoreCase("round")) {
return Math.round(fncargs.next());
}
if (fncnam.equalsIgnoreCase("roundHE")) {
return Math.rint(fncargs.next());
} // round half-even
}
break;
case 's':
{
if (fncnam.equalsIgnoreCase("signum")) {
return Math.signum(fncargs.next());
}
if (fncnam.equalsIgnoreCase("sin")) {
return Math.sin(fncargs.next());
}
if (fncnam.equalsIgnoreCase("sinh")) {
return Math.sinh(fncargs.next());
}
if (fncnam.equalsIgnoreCase("sqrt")) {
return Math.sqrt(fncargs.next());
}
}
break;
case 't':
{
if (fncnam.equalsIgnoreCase("tan")) {
return Math.tan(fncargs.next());
}
if (fncnam.equalsIgnoreCase("tanh")) {
return Math.tanh(fncargs.next());
}
if (fncnam.equalsIgnoreCase("toDegrees")) {
return Math.toDegrees(fncargs.next());
}
if (fncnam.equalsIgnoreCase("toRadians")) {
return Math.toRadians(fncargs.next());
}
}
break;
case 'u':
{
if (fncnam.equalsIgnoreCase("ulp")) {
return Math.ulp(fncargs.next());
}
}
break;
// no default
}
throw new UnsupportedOperationException(
"MathEval internal function setup is incorrect - internal function \""
+ fncnam
+ "\" not handled");
}
public static boolean epsEquals(double a, double b) {
return Math.abs(a - b) < EPS;
};
/**
* Checks if given <code>value</code> is a power of two.
*
* @param value any number
* @return <code>true</code> when <code>value</code> is power of two, <code>false</code> otherwise
*/
public static boolean isPowerOfTwo(int value) {
value = Math.abs(value);
// return (Math.abs(value) | (Math.abs(value) - 1)) == 0;
return Integer.bitCount(value) == 1;
}
