using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Security.Cryptography;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("ADD: ");
            //byte[] playtext = Encoding.ASCII.GetBytes(Console.ReadLine());

            SHA256Managed myHash = new SHA256Managed();
            string some_text = "this is an important message";
            string some_text1 = Console.ReadLine();
            //sign the message
            byte[] signature;



            RSACryptoServiceProvider myrsa = new RSACryptoServiceProvider(1600);
            signature = myrsa.SignData(System.Text.Encoding.ASCII.GetBytes(some_text1), myHash);
            bool verified;

            verified =myrsa.VerifyData(System.Text.Encoding.ASCII.GetBytes(some_text), myHash, signature);

            Console.Write(" "+verified);

            System.Diagnostics.Stopwatch swatch = new System.Diagnostics.Stopwatch();
            int size;
            int count = 100;
            swatch.Start();
            for (int i = 0; i < count; i++)
            {
                myrsa = new RSACryptoServiceProvider(1024);
                size = myrsa.KeySize;
                Console.Write(i + " ");
            }
            swatch.Stop();
            Console.WriteLine("Generation time at 1024 bit ... " +(swatch.ElapsedTicks / (10 * count)).ToString() + " ms");
            byte[] plain = new byte[20];
            byte[] ciphertext = myrsa.Encrypt(plain, true);
            swatch.Reset();
            swatch.Start();
            for (int i = 0; i < count; i++)
            {
                ciphertext = myrsa.Encrypt(plain, true);
                Console.WriteLine(Encoding.UTF8.GetString(ciphertext, 0, ciphertext.Length) + " ");
            }
            swatch.Stop();
            Console.WriteLine("Encryption time at 1024 bit ... " + (swatch.ElapsedTicks / (10 * count)).ToString() + " ms");
            swatch.Reset();
            swatch.Start();
            for (int i = 0; i < count; i++)
            {
                plain = myrsa.Decrypt(ciphertext, true);
                Console.Write(Encoding.UTF8.GetString(plain, 0, plain.Length) + " ");

            }
            swatch.Stop();
            Console.WriteLine("Decryption time at 1024 bit ... " + (swatch.ElapsedTicks / (10 * count)).ToString() + " ms");
            Console.ReadKey();
        }
    }
}