mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
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50 lines
1.3 KiB
Go
50 lines
1.3 KiB
Go
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//
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// Copyright Coinbase, Inc. All Rights Reserved.
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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package v0
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import (
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"crypto/elliptic"
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"math/big"
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"golang.org/x/crypto/sha3"
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"source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/core/curves"
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)
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const (
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kappa = 256 // Computational security parameter.
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s = 80 // statistical security parameter. does this have to be so high?! i've seen 40. // TODO: investigate why 80
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kappaOT = kappa + s
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)
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type Params struct {
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Curve elliptic.Curve
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Scalar curves.EcScalar
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Generator *curves.EcPoint
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gadget [2*kappa + 2*s]*big.Int
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}
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// NewParams receives an implementation of the curve and scalar interfaces and
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// sets the parameters needed for DKG and Threshold ECDSA of DKLS.
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func NewParams(curve elliptic.Curve, scalar curves.EcScalar) (*Params, error) {
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params := &Params{Curve: curve, Scalar: scalar}
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params.Generator = &curves.EcPoint{Curve: curve, X: curve.Params().Gx, Y: curve.Params().Gy}
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for i := 0; i < kappa; i++ {
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params.gadget[i] = new(big.Int).Lsh(big.NewInt(1), uint(i))
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}
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shake := sha3.NewCShake256(nil, []byte("Play as a championship team."))
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for i := kappa; i < 2*kappa+2*s; i++ {
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var err error
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bytes := [32]byte{}
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if _, err = shake.Read(bytes[:]); err != nil {
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return nil, err
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}
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params.gadget[i] = new(big.Int).SetBytes(bytes[:])
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}
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return params, nil
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}
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