/// <summary>
/// Task 1,5. Generating of public and private keys.
/// </summary>
/// <param name="keyLength">Key length</param>
/// <param name="keyChange">For p and q length cnanging</param>
/// <returns>KeysHolder</returns>
private static KeysHolder GenerateKeys(int keyLength, int keyChange)
{
var generator = new PrimeNumbersGenerator();
// generating of prime numbers
var pNumeric = GeneratePrimeNumber(keyLength - keyChange, generator);
var qNumeric = GeneratePrimeNumber(keyLength + keyChange, generator);
Console.WriteLine(String.Format("Prime numbers p = {0} and q = {1} are generated.", pNumeric, qNumeric));
//// generating of composite numbers (on purpose)
//var pNumeric = GenerateNotPrimeNumber(keyLength, generator);
//var qNumeric = GenerateNotPrimeNumber(keyLength, generator);
//Console.WriteLine(String.Format("Составные числа p = {0} и q = {1} сгенерированы.", pNumeric, qNumeric));
// Calculating public exp, private exp and cypher module
var keysToReturn = CalculateKeysValues(keyLength, pNumeric, qNumeric, generator);
FileWorker.CreateNEWFile(keysToReturn.publicKey, "public.txt");
FileWorker.CreateNEWFile(keysToReturn.privateKey, "private.txt");
FileWorker.CreateNEWFile(keysToReturn.cypherModule, "cyphermodule.txt");
Console.WriteLine("The keys are generated and placed in public.txt, private.txt, cyphermodule.txt");
return(keysToReturn);
}
