private static IEnumerable <RoundWords> ChunkTogetherRoundKeys(IEnumerable <byte[]> allKeys)
{
IList <RoundWords> roundWords = new List <RoundWords>();
for (int i = 0; i < allKeys.Count() / 4; i++)
{
RoundWords wordWrap = new RoundWords();
IEnumerable <byte[]> wordsAfterSkip = allKeys.Skip(i * 4);
IEnumerable <byte[]> words = wordsAfterSkip.Take(4);
wordWrap.Words = words;
roundWords.Add(wordWrap);
}
return(roundWords);
}
public ByteArray AddRoundKey(ByteArray state, RoundWords roundKeys4)
{
if (roundKeys4.Words.Count() != 4)
{
throw new ArgumentOutOfRangeException("roundKeys4", "Round key must have 4 words");
}
ByteArray copyState = new ByteArray(state.Length);
for (int i = 0; i < state.Length; i++)
{
for (int j = 0; j < state.Length; j++)
{
byte[] word = roundKeys4.Words.ElementAt(j);
byte stateByte = state[i, j];
byte wordByte = word[i];
copyState[i, j] = (byte)(stateByte ^ wordByte);
}
}
return(copyState);
}
public void UpdateState(Func <ByteArray, RoundWords, ByteArray> addRoundKeyMethod, int roundNumber, string actionName, RoundWords roundWords)
{
State = addRoundKeyMethod(State, roundWords);
RoundNumber = roundNumber;
LastActionName = actionName;
OnStateChange(new AesStateChangeEventArgs(State, RoundNumber, LastActionName));
}