package ic_java.false_positives;
import java.math.BigInteger;
import java.security.SecureRandom;
public class FalsePositives07 {
private SecureRandom init_random;
private static final BigInteger ONE = BigInteger.valueOf(1);
private static final BigInteger TWO = BigInteger.valueOf(2);
public long procedure_Aa(long x0, long c, BigInteger[] pq, int size)
{
//Verify and perform condition: 0<x<2^32; 0<c<2^32; c - odd.
while(x0<0 || x0>4294967296L)
{
x0 = init_random.nextInt()*2;
}
while((c<0 || c>4294967296L) || (c/2==0))
{
c = init_random.nextInt()*2+1;
}
BigInteger C = new BigInteger(Long.toString(c));
BigInteger constA32 = new BigInteger("97781173");
//step1
BigInteger[] y = new BigInteger[1]; // begin length = 1
y[0] = new BigInteger(Long.toString(x0));
//step 2
int[] t = new int[1]; // t - orders; begin length = 1
t[0] = size;
int s = 0;
for (int i=0; t[i]>=33; i++)
{
// extension array t
int tmp_t[] = new int[t.length + 1]; ///////////////
System.arraycopy(t,0,tmp_t,0,t.length); // extension
t = new int[tmp_t.length]; // array t
System.arraycopy(tmp_t, 0, t, 0, tmp_t.length); ///////////////
t[i+1] = t[i]/2;
s = i+1;
}
//step3
BigInteger p[] = new BigInteger[s+1];
p[s] = new BigInteger("8000000B",16); //set min prime number length 32 bit
int m = s-1; //step4
for (int i=0; i<s; i++)
{
int rm = t[m]/32; //step5
step6: for(;;)
{
//step 6
BigInteger tmp_y[] = new BigInteger[y.length]; ////////////////
System.arraycopy(y,0,tmp_y,0,y.length); // extension
y = new BigInteger[rm+1]; // array y
System.arraycopy(tmp_y,0,y,0,tmp_y.length); ////////////////
for (int j=0; j<rm; j++)
{
y[j+1] = (y[j].multiply(constA32).add(C)).mod(TWO.pow(32));
}
//step 7
BigInteger Ym = new BigInteger("0");
for (int j=0; j<rm; j++)
{
Ym = Ym.add(y[j].multiply(TWO.pow(32*j)));
}
y[0] = y[rm]; //step 8
//step 9
BigInteger N = TWO.pow(t[m]-1).divide(p[m+1]).
add((TWO.pow(t[m]-1).multiply(Ym)).
divide(p[m+1].multiply(TWO.pow(32*rm))));
if (N.mod(TWO).compareTo(ONE)==0)
{
N = N.add(ONE);
}
int k = 0; //step 10
step11: for(;;)
{
//step 11
p[m] = p[m+1].multiply(N.add(BigInteger.valueOf(k))).add(ONE);
if (p[m].compareTo(TWO.pow(t[m]))==1)
{
continue step6; //step 12
}
//step13
if ((TWO.modPow(p[m+1].multiply(N.add(BigInteger.valueOf(k))),p[m]).compareTo(ONE)==0) &&
(TWO.modPow(N.add(BigInteger.valueOf(k)),p[m]).compareTo(ONE)!=0))
{
m -= 1;
break;
}
else
{
k += 2;
continue step11;
}
}
if (m>=0)
{
break; //step 14
}
else
{
pq[0] = p[0];
pq[1] = p[1];
return y[0].longValue(); //return for procedure B' step 2
}
}
}
return y[0].longValue();
}
//Procedure B'
@SuppressWarnings("unused")
private void procedure_Bb(long x0, long c, BigInteger[] pq)
{
//Verify and perform condition: 0<x<2^32; 0<c<2^32; c - odd.
while(x0<0 || x0>4294967296L)
{
x0 = init_random.nextInt()*2;
}
while((c<0 || c>4294967296L) || (c/2==0))
{
c = init_random.nextInt()*2+1;
}
BigInteger [] qp = new BigInteger[2];
BigInteger q = null, Q = null, p = null;
BigInteger C = new BigInteger(Long.toString(c));
BigInteger constA32 = new BigInteger("97781173");
//step1
x0 = procedure_Aa(x0, c, qp, 256);
q = qp[0];
//step2
x0 = procedure_Aa(x0, c, qp, 512);
Q = qp[0];
BigInteger[] y = new BigInteger[33];
y[0] = new BigInteger(Long.toString(x0));
int tp = 1024;
step3: for(;;)
{
//step 3
for (int j=0; j<32; j++)
{
y[j+1] = (y[j].multiply(constA32).add(C)).mod(TWO.pow(32));
}
//step 4
BigInteger Y = new BigInteger("0");
for (int j=0; j<32; j++)
{
Y = Y.add(y[j].multiply(TWO.pow(32*j)));
}
y[0] = y[32]; //step 5
//step 6
BigInteger N = TWO.pow(tp-1).divide(q.multiply(Q)).
add((TWO.pow(tp-1).multiply(Y)).
divide(q.multiply(Q).multiply(TWO.pow(1024))));
if (N.mod(TWO).compareTo(ONE)==0)
{
N = N.add(ONE);
}
int k = 0; //step 7
step8: for(;;)
{
//step 11
p = q.multiply(Q).multiply(N.add(BigInteger.valueOf(k))).add(ONE);
if (p.compareTo(TWO.pow(tp))==1)
{
continue step3; //step 9
}
//step10
if ((TWO.modPow(q.multiply(Q).multiply(N.add(BigInteger.valueOf(k))),p).compareTo(ONE)==0) &&
(TWO.modPow(q.multiply(N.add(BigInteger.valueOf(k))),p).compareTo(ONE)!=0))
{
pq[0] = p;
pq[1] = q;
return;
}
else
{
k += 2;
continue step8;
}
}
}
}
}