github.com/icodeface/tls@v0.0.0-20230910023335-34df9250cd12/internal/x/crypto/curve25519/doc.go (about)

     1  // Copyright 2012 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // Package curve25519 provides an implementation of scalar multiplication on
     6  // the elliptic curve known as curve25519. See https://cr.yp.to/ecdh.html
     7  package curve25519
     8  
     9  // basePoint is the x coordinate of the generator of the curve.
    10  var basePoint = [32]byte{9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
    11  
    12  // ScalarMult sets dst to the product in*base where dst and base are the x
    13  // coordinates of group points and all values are in little-endian form.
    14  func ScalarMult(dst, in, base *[32]byte) {
    15  	scalarMult(dst, in, base)
    16  }
    17  
    18  // ScalarBaseMult sets dst to the product in*base where dst and base are the x
    19  // coordinates of group points, base is the standard generator and all values
    20  // are in little-endian form.
    21  func ScalarBaseMult(dst, in *[32]byte) {
    22  	ScalarMult(dst, in, &basePoint)
    23  }