# Functions
ScalarBaseMult sets dst to the product scalar * base where base is the standard generator.
ScalarMult sets dst to the product scalar * point.
X25519 returns the result of the scalar multiplication (scalar * point), according to RFC 7748, Section 5.
# Constants
PointSize is the size of the point input to X25519.
ScalarSize is the size of the scalar input to X25519.
# Variables
Basepoint is the canonical Curve25519 generator.