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(); }