Package curve25519 provides an implementation of scalar multiplication on the elliptic curve known as curve25519. See https://cr.yp.to/ecdh.html
ScalarBaseMult sets dst to the product in*base where dst and base are the x coordinates of group points, base is the standard generator and all values are in little-endian form.
ScalarMult sets dst to the product in*base where dst and base are the x coordinates of group points and all values are in little-endian form.