C++ (Cpp) LE_SWAP32 Examples

Example #1

File: scrypt.c Project: GostCrypt/libgcrypt

static void
salsa20_core (u32 *dst, const u32 *src, unsigned int rounds)
{
  u32 x[SALSA20_INPUT_LENGTH];
  unsigned i;

  assert ( (rounds & 1) == 0);

  for (i = 0; i < SALSA20_INPUT_LENGTH; i++)
    x[i] = LE_SWAP32(src[i]);

  for (i = 0; i < rounds;i += 2)
    {
      QROUND(x[0], x[4], x[8], x[12]);
      QROUND(x[5], x[9], x[13], x[1]);
      QROUND(x[10], x[14], x[2], x[6]);
      QROUND(x[15], x[3], x[7], x[11]);

      QROUND(x[0], x[1], x[2], x[3]);
      QROUND(x[5], x[6], x[7], x[4]);
      QROUND(x[10], x[11], x[8], x[9]);
      QROUND(x[15], x[12], x[13], x[14]);
    }

  for (i = 0; i < SALSA20_INPUT_LENGTH; i++)
    {
      u32 t = x[i] + LE_SWAP32(src[i]);
      dst[i] = LE_SWAP32(t);
    }
}

Example #2

File: salsa20-core-internal.c Project: ShiftMediaProject/nettle

void
_salsa20_core(uint32_t *dst, const uint32_t *src, unsigned rounds)
{
  uint32_t x[_SALSA20_INPUT_LENGTH];
  unsigned i;

  assert ( (rounds & 1) == 0);

  memcpy (x, src, sizeof(x));
  for (i = 0; i < rounds;i += 2)
    {
      DEBUG (i);
      QROUND(x[0], x[4], x[8], x[12]);
      QROUND(x[5], x[9], x[13], x[1]);
      QROUND(x[10], x[14], x[2], x[6]);
      QROUND(x[15], x[3], x[7], x[11]);

      DEBUG (i+1);
      QROUND(x[0], x[1], x[2], x[3]);
      QROUND(x[5], x[6], x[7], x[4]);
      QROUND(x[10], x[11], x[8], x[9]);
      QROUND(x[15], x[12], x[13], x[14]);
    }
  DEBUG (i);

  for (i = 0; i < _SALSA20_INPUT_LENGTH; i++)
    {
      uint32_t t = x[i] + src[i];
      dst[i] = LE_SWAP32 (t);
    }
}

Example #3

File: salsa20.c Project: Greenchik/libgcrypt

static void
salsa20_core (u32 *dst, const u32 *src)
{
  u32 pad[SALSA20_INPUT_LENGTH];
  unsigned int i;

  memcpy (pad, src, sizeof(pad));
  for (i = 0; i < SALSA20_ROUNDS; i += 2)
    {
      SALSA20_CORE_DEBUG (i);
      QROUND (pad[0],  pad[4],  pad[8],  pad[12]);
      QROUND (pad[5],  pad[9],  pad[13], pad[1] );
      QROUND (pad[10], pad[14], pad[2],  pad[6] );
      QROUND (pad[15], pad[3],  pad[7],  pad[11]);

      SALSA20_CORE_DEBUG (i+1);
      QROUND (pad[0],  pad[1],  pad[2],  pad[3] );
      QROUND (pad[5],  pad[6],  pad[7],  pad[4] );
      QROUND (pad[10], pad[11], pad[8],  pad[9] );
      QROUND (pad[15], pad[12], pad[13], pad[14]);
    }
  SALSA20_CORE_DEBUG (i);

  for (i = 0; i < SALSA20_INPUT_LENGTH; i++)
    {
      u32 t = pad[i] + src[i];
      dst[i] = LE_SWAP32 (t);
    }
}

Example #4

File: salsa20.c Project: creationst/Creation2

static unsigned int
salsa20_core (u32 *dst, SALSA20_context_t *ctx, unsigned rounds)
{
  u32 pad[SALSA20_INPUT_LENGTH], *src = ctx->input;
  unsigned int i;

  memcpy (pad, src, sizeof(pad));
  for (i = 0; i < rounds; i += 2)
    {
      SALSA20_CORE_DEBUG (i);
      QROUND (pad[0],  pad[4],  pad[8],  pad[12]);
      QROUND (pad[5],  pad[9],  pad[13], pad[1] );
      QROUND (pad[10], pad[14], pad[2],  pad[6] );
      QROUND (pad[15], pad[3],  pad[7],  pad[11]);

      SALSA20_CORE_DEBUG (i+1);
      QROUND (pad[0],  pad[1],  pad[2],  pad[3] );
      QROUND (pad[5],  pad[6],  pad[7],  pad[4] );
      QROUND (pad[10], pad[11], pad[8],  pad[9] );
      QROUND (pad[15], pad[12], pad[13], pad[14]);
    }
  SALSA20_CORE_DEBUG (i);

  for (i = 0; i < SALSA20_INPUT_LENGTH; i++)
    {
      u32 t = pad[i] + src[i];
      dst[i] = LE_SWAP32 (t);
    }

  /* Update counter. */
  if (!++src[8])
    src[9]++;

  /* burn_stack */
  return ( 3*sizeof (void*) \
         + 2*sizeof (void*) \
         + 64 \
         + sizeof (unsigned int) \
         + sizeof (u32) );
}