PHPRPC Code

using System;
using System.IO;
using Mono.Math;

class KeyGen
{
    static void Main(string[] args)
    {
        StreamWriter sw = new StreamWriter("KeyPairGen.java");
        sw.WriteLine("package coolcode.phprpc;");
        sw.WriteLine();
        sw.WriteLine("import java.lang.*;");
        sw.WriteLine("import java.util.*;");
        sw.WriteLine();
        sw.WriteLine("public class KeyPairGen {");
        sw.WriteLine("    private static HashMap[] __keypair = new HashMap[100];");
        sw.WriteLine("    private static Random __rand = new Random();");
        sw.WriteLine("    private KeyPairGen() {}");
        sw.WriteLine("    static {");
        BigInteger n1 = new BigInteger(1);
        BigInteger n2 = new BigInteger(2);
        for (int i = 0; i < 100; i++)
        {
            bool f = false;
            BigInteger q = null, p = null, g = null;
            while (!f)
            {
                q = BigInteger.GeneratePseudoPrime(127);
                p = q << 1;
                p.SetBit(0);
                if (p.IsProbablePrime()) f = true;
            }
            while (f)
            {
                g = BigInteger.GenerateRandom(127);
                if (g.ModPow(n2, p) != n1 && g.ModPow(q, p) != n1)
                {
                    f = false;
                }
            }
            Console.WriteLine("p=" + p.ToString());
            Console.WriteLine("g=" + g.ToString());
            sw.WriteLine("        __keypair[" + i.ToString() + "] = new HashMap();");
            sw.WriteLine("        __keypair[" + i.ToString() + "].put(\"p\", \"" + p.ToString() + "\");");
            sw.WriteLine("        __keypair[" + i.ToString() + "].put(\"g\", \"" + g.ToString() + "\");");
        }
        sw.WriteLine("    }");
        sw.WriteLine("    public static HashMap genRandomKeyPair() {");
        sw.WriteLine("        return __keypair[__rand.nextInt(100)];");
        sw.WriteLine("    }");
        sw.WriteLine("}");
        sw.Close();
    }
}