void fe25519_mul()

in fe25519.c [196:211]

• 13 lines of code
• 5 McCabe index (conditional complexity)

void fe25519_mul(fe25519 *r, const fe25519 *x, const fe25519 *y)
{
  int i,j;
  crypto_uint32 t[63];
  for(i=0;i<63;i++)t[i] = 0;

  for(i=0;i<32;i++)
    for(j=0;j<32;j++)
      t[i+j] += x->v[i] * y->v[j];

  for(i=32;i<63;i++)
    r->v[i-32] = t[i-32] + times38(t[i]); 
  r->v[31] = t[31]; /* result now in r[0]...r[31] */

  reduce_mul(r);
}