-
Notifications
You must be signed in to change notification settings - Fork 150
/
curve.go
67 lines (55 loc) · 1.87 KB
/
curve.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
// Copyright 2020 ConsenSys Software Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Code generated by consensys/gnark-crypto DO NOT EDIT
package twistededwards
import (
"math/big"
"sync"
"github.com/consensys/gnark-crypto/ecc/bls12-377/fr"
)
// CurveParams curve parameters: ax^2 + y^2 = 1 + d*x^2*y^2
type CurveParams struct {
A, D fr.Element
Cofactor fr.Element
Order big.Int
Base PointAffine
}
// GetEdwardsCurve returns the twisted Edwards curve on bls12-377/Fr
func GetEdwardsCurve() CurveParams {
initOnce.Do(initCurveParams)
// copy to keep Order private
var res CurveParams
res.A.Set(&curveParams.A)
res.D.Set(&curveParams.D)
res.Cofactor.Set(&curveParams.Cofactor)
res.Order.Set(&curveParams.Order)
res.Base.Set(&curveParams.Base)
return res
}
var (
initOnce sync.Once
curveParams CurveParams
)
func initCurveParams() {
curveParams.A.SetString("-1")
curveParams.D.SetString("3021")
curveParams.Cofactor.SetString("4")
curveParams.Order.SetString("2111115437357092606062206234695386632838870926408408195193685246394721360383", 10)
curveParams.Base.X.SetString("717051916204163000937139483451426116831771857428389560441264442629694842243")
curveParams.Base.Y.SetString("882565546457454111605105352482086902132191855952243170543452705048019814192")
}
// mulByA multiplies fr.Element by curveParams.A
func mulByA(x *fr.Element) {
x.Neg(x)
}