STATIC int
curve25519_basepoint_impl(uint8_t *output, const uint8_t *secret)
{
int r = 0;
if (PREDICT_UNLIKELY(curve25519_use_ed == -1)) {
pick_curve25519_basepoint_impl();
}
/* TODO: Someone should benchmark curved25519_scalarmult_basepoint versus
* an optimized NaCl build to see which should be used when compiled with
* NaCl available. I suspected that the ed25519 optimization always wins.
*/
if (PREDICT_LIKELY(curve25519_use_ed == 1)) {
curved25519_scalarmult_basepoint_donna(output, secret);
r = 0;
} else {
static const uint8_t basepoint[32] = {9};
r = curve25519_impl(output, secret, basepoint);
}
return r;
}
/** Initialize the curve25519 implementations. This is necessary if you're
* going to use them in a multithreaded setting, and not otherwise. */
void
curve25519_init(void)
{
pick_curve25519_basepoint_impl();
}
