mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-12-03 23:19:44 +00:00
58 lines
2.1 KiB
Go
Executable file
58 lines
2.1 KiB
Go
Executable file
package elliptic
|
|
|
|
/*
|
|
This file was originally made by vsergeev.
|
|
|
|
Modifications have been made under the MIT license.
|
|
License: MIT
|
|
|
|
|
|
*/
|
|
|
|
import (
|
|
"math/big"
|
|
)
|
|
|
|
var curve Curve
|
|
|
|
type curveType string
|
|
|
|
const (
|
|
Secp256r1 curveType = "Secp256r1"
|
|
Secp256k1 curveType = "Secp256k1"
|
|
)
|
|
|
|
func (ChosenCurve *Curve) SetCurveSecp256r1() {
|
|
ChosenCurve.P, _ = new(big.Int).SetString("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF", 16) //Q
|
|
ChosenCurve.A, _ = new(big.Int).SetString("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC", 16)
|
|
ChosenCurve.B, _ = new(big.Int).SetString("5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B", 16)
|
|
ChosenCurve.G.X, _ = new(big.Int).SetString("6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296", 16)
|
|
ChosenCurve.G.Y, _ = new(big.Int).SetString("4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5", 16)
|
|
ChosenCurve.N, _ = new(big.Int).SetString("FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551", 16)
|
|
ChosenCurve.H, _ = new(big.Int).SetString("01", 16)
|
|
ChosenCurve.Name = "Secp256r1"
|
|
}
|
|
|
|
func (ChosenCurve *Curve) SetCurveSecp256k1() {
|
|
ChosenCurve.P, _ = new(big.Int).SetString("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F", 16)
|
|
ChosenCurve.A, _ = new(big.Int).SetString("0000000000000000000000000000000000000000000000000000000000000000", 16)
|
|
ChosenCurve.B, _ = new(big.Int).SetString("0000000000000000000000000000000000000000000000000000000000000007", 16)
|
|
ChosenCurve.G.X, _ = new(big.Int).SetString("79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798", 16)
|
|
ChosenCurve.G.Y, _ = new(big.Int).SetString("483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8", 16)
|
|
ChosenCurve.N, _ = new(big.Int).SetString("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141", 16)
|
|
ChosenCurve.H, _ = new(big.Int).SetString("01", 16)
|
|
ChosenCurve.Name = "Secp256k1"
|
|
}
|
|
|
|
func NewEllipticCurve(ct curveType) Curve {
|
|
var curve Curve
|
|
switch ct {
|
|
case Secp256k1:
|
|
curve.SetCurveSecp256k1()
|
|
case Secp256r1:
|
|
curve.SetCurveSecp256r1()
|
|
default:
|
|
curve.SetCurveSecp256r1()
|
|
}
|
|
return curve
|
|
}
|