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// Copyright (c) 2018, Google Inc.
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//go:build ignore
package main
import (
"crypto/elliptic"
"fmt"
"math/big"
)
const numPoints = 64
func printPadded(key string, n, max *big.Int) {
padded := make([]byte, len(max.Bytes()))
b := n.Bytes()
copy(padded[len(padded)-len(b):], b)
fmt.Printf("%s = %x\n", key, padded)
}
func printMultiples(name string, curve elliptic.Curve) {
n := new(big.Int)
for i := -numPoints; i <= numPoints; i++ {
fmt.Printf("Curve = %s\n", name)
n.SetInt64(int64(i))
if i < 0 {
n = n.Add(n, curve.Params().N)
}
fmt.Printf("# N = %d\n", i)
printPadded("N", n, curve.Params().N)
x, y := curve.ScalarBaseMult(n.Bytes())
printPadded("X", x, curve.Params().P)
printPadded("Y", y, curve.Params().P)
fmt.Printf("\n")
}
}
func main() {
fmt.Printf(`# This file contains multiples of the base point for various curves. The point
# at infinity is represented as X = 0, Y = 0.
#
# This file is generated by make_ec_scalar_base_mult_tests.go
`)
printMultiples("P-224", elliptic.P224())
printMultiples("P-256", elliptic.P256())
printMultiples("P-384", elliptic.P384())
printMultiples("P-521", elliptic.P521())
}
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