Function Cipher

payload.cpp:519–542

Cipher is the main function that encrypts the PlainText.

// Cipher is the main function that encrypts the PlainText.
static void Cipher(state_t* state, const uint8_t* RoundKey)
{
  uint8_t round = 0;

  // Add the First round key to the state before starting the rounds.
  AddRoundKey(0, state, RoundKey);

  // There will be Nr rounds.
  // The first Nr-1 rounds are identical.
  // These Nr rounds are executed in the loop below.
  // Last one without MixColumns()
  for (round = 1; ; ++round)
  {
    SubBytes(state);
    ShiftRows(state);
    if (round == Nr) {
      break;
    }
    MixColumns(state);
    AddRoundKey(round, state, RoundKey);
  }
  // Add round key to last round
  AddRoundKey(Nr, state, RoundKey);
}

#if (defined(CBC) && CBC == 1) || (defined(ECB) && ECB == 1)
static void InvCipher(state_t* state, const uint8_t* RoundKey)