SENG2250_Assignment3/Q2Tools.java

import java.math.BigInteger;

public class Q2Tools {

    Q2Tools()
    {
        //Nothing to do here
    }
    
    public void generateRSA()
    {

        int e = 65537;

        //Generate p

        //Generate q



    }

    /**
     * A^B mod C
     * @param A
     * @param B
     * @param C
     */
    public void fastModularExpon(int A, int B, int C)
    {
        String bInBinary = Integer.toBinaryString(B);

        int test = 0;

        System.out.println(bInBinary);

        int k = 0;
        for(int i = bInBinary.length()-1; i >= 0; i--)
        {
            
            if(bInBinary.charAt(i)=='1')
            {
                double temp = Math.pow(2, k);
                System.out.println(2+"^"+k+"="+temp);
                test += temp;
            }
            else
            {
                System.out.println(0+"^"+k+"=0"); 
            }
            k++;
        }
        
        System.out.println(test);
    }

    /**
     * Simply wrapper for Integer.toBinaryString
     * @param number integer to be converted to binary
     * @return binary of number as an Biginteger
     */
    public BigInteger convertToBinaryBigInt(int number)
    {
        //Take input number, convert to binary string
        String binaryString = Integer.toBinaryString(number);
        BigInteger bigBinary = new BigInteger(binaryString);
        return bigBinary;
    }

}