static void Main(string[] args)
{
ProgramMenu menu = new ProgramMenu();
Tuple <string[], string[]> lastCipherText = null;
while (true)
{
ProgramAction direction = menu.ChooseCipherAction();
AesCipher cipherProgram = new AesCipher();
Tuple <string[], string[]> valuesToUse = null;
while (valuesToUse == null)
{
switch (direction)
{
case ProgramAction.Cipher:
{
CipherInputAction menuStartingChoice = menu.ChooseCipherInputType();
valuesToUse = GetCipherProgramValuesToUse(menu, menuStartingChoice);
IEnumerable <RoundWords> roundKeys = GetRoundKeys(valuesToUse);
menu.PromptForContinue();
byte[] inputBytes = valuesToUse.Item2.Select(x => CreateByteFromHexadecimal(x)).ToArray();
ByteArray result = cipherProgram.Cipher(inputBytes, roundKeys);
lastCipherText = new Tuple <string[], string[]>(valuesToUse.Item1, result.Bytes1dArray.Select(x => CreateHexadecimalFromByte(x)).ToArray());
break;
}
case ProgramAction.Decipher:
{
DecipherInputAction menuStartingChoice = menu.ChooseDecipherInputType();
valuesToUse = GetDecipherProgramValuesToUse(menu, menuStartingChoice, lastCipherText);
IEnumerable <RoundWords> roundKeys = GetRoundKeys(valuesToUse);
menu.PromptForContinue();
byte[] inputBytes = valuesToUse.Item2.Select(x => CreateByteFromHexadecimal(x)).ToArray();
cipherProgram.Decipher(inputBytes, roundKeys);
break;
}
default:
{
throw new Exception(SurpriseExceptionMessage);
}
}
}
menu.PromptForContinue();
}
}
private static Tuple <string[], string[]> GetDecipherProgramValuesToUse(ProgramMenu menu, DecipherInputAction menuStartingChoice, Tuple <string[], string[]> lastCipherText)
{
Tuple <string[], string[]> valuesToUse = null;
switch (menuStartingChoice)
{
case DecipherInputAction.LastGeneratedCipherText:
{
if (lastCipherText != null)
{
valuesToUse = lastCipherText;
}
else
{
menu.NoLastCipherTextWarning();
}
break;
}
case DecipherInputAction.UserInput:
{
valuesToUse = menu.InputValues();
break;
}
default:
{
throw new Exception(SurpriseExceptionMessage);
}
}
return(valuesToUse);
}