Method processBlock

src/sha3.cpp:90–168

process a full block

/// process a full block
void SHA3::processBlock(const void* data)
{
#if defined(__BYTE_ORDER) && (__BYTE_ORDER != 0) && (__BYTE_ORDER == __BIG_ENDIAN)
#define LITTLEENDIAN(x) swap(x)
#else
#define LITTLEENDIAN(x) (x)
#endif

  const uint64_t* data64 = (const uint64_t*) data;
  // mix data into state
  for (unsigned int i = 0; i < m_blockSize / 8; i++)
    m_hash[i] ^= LITTLEENDIAN(data64[i]);

  // re-compute state
  for (unsigned int round = 0; round < Rounds; round++)
  {
    // Theta
    uint64_t coefficients[5];
    for (unsigned int i = 0; i < 5; i++)
      coefficients[i] = m_hash[i] ^ m_hash[i + 5] ^ m_hash[i + 10] ^ m_hash[i + 15] ^ m_hash[i + 20];

    for (unsigned int i = 0; i < 5; i++)
    {
      uint64_t one = coefficients[mod5(i + 4)] ^ rotateLeft(coefficients[mod5(i + 1)], 1);
      m_hash[i     ] ^= one;
      m_hash[i +  5] ^= one;
      m_hash[i + 10] ^= one;
      m_hash[i + 15] ^= one;
      m_hash[i + 20] ^= one;
    }

    // temporary
    uint64_t one;

    // Rho Pi
    uint64_t last = m_hash[1];
    one = m_hash[10]; m_hash[10] = rotateLeft(last,  1); last = one;
    one = m_hash[ 7]; m_hash[ 7] = rotateLeft(last,  3); last = one;
    one = m_hash[11]; m_hash[11] = rotateLeft(last,  6); last = one;
    one = m_hash[17]; m_hash[17] = rotateLeft(last, 10); last = one;
    one = m_hash[18]; m_hash[18] = rotateLeft(last, 15); last = one;
    one = m_hash[ 3]; m_hash[ 3] = rotateLeft(last, 21); last = one;
    one = m_hash[ 5]; m_hash[ 5] = rotateLeft(last, 28); last = one;
    one = m_hash[16]; m_hash[16] = rotateLeft(last, 36); last = one;
    one = m_hash[ 8]; m_hash[ 8] = rotateLeft(last, 45); last = one;
    one = m_hash[21]; m_hash[21] = rotateLeft(last, 55); last = one;
    one = m_hash[24]; m_hash[24] = rotateLeft(last,  2); last = one;
    one = m_hash[ 4]; m_hash[ 4] = rotateLeft(last, 14); last = one;
    one = m_hash[15]; m_hash[15] = rotateLeft(last, 27); last = one;
    one = m_hash[23]; m_hash[23] = rotateLeft(last, 41); last = one;
    one = m_hash[19]; m_hash[19] = rotateLeft(last, 56); last = one;
    one = m_hash[13]; m_hash[13] = rotateLeft(last,  8); last = one;
    one = m_hash[12]; m_hash[12] = rotateLeft(last, 25); last = one;
    one = m_hash[ 2]; m_hash[ 2] = rotateLeft(last, 43); last = one;
    one = m_hash[20]; m_hash[20] = rotateLeft(last, 62); last = one;
    one = m_hash[14]; m_hash[14] = rotateLeft(last, 18); last = one;
    one = m_hash[22]; m_hash[22] = rotateLeft(last, 39); last = one;
    one = m_hash[ 9]; m_hash[ 9] = rotateLeft(last, 61); last = one;