1203c6a237
* crypto/bn256: full switchover to cloudflare's code * crypto/bn256: only use cloudflare for optimized architectures * crypto/bn256: upstream fallback for non-optimized code * .travis, build: drop support for Go 1.8 (need type aliases) * crypto/bn256/cloudflare: enable curve mul lattice optimization
139 lines
3.6 KiB
Go
139 lines
3.6 KiB
Go
// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// +build gofuzz
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package bn256
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import (
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"bytes"
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"math/big"
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cloudflare "github.com/ethereum/go-ethereum/crypto/bn256/cloudflare"
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google "github.com/ethereum/go-ethereum/crypto/bn256/google"
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)
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// FuzzAdd fuzzez bn256 addition between the Google and Cloudflare libraries.
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func FuzzAdd(data []byte) int {
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// Ensure we have enough data in the first place
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if len(data) != 128 {
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return 0
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}
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// Ensure both libs can parse the first curve point
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xc := new(cloudflare.G1)
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_, errc := xc.Unmarshal(data[:64])
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xg := new(google.G1)
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_, errg := xg.Unmarshal(data[:64])
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if (errc == nil) != (errg == nil) {
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panic("parse mismatch")
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} else if errc != nil {
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return 0
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}
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// Ensure both libs can parse the second curve point
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yc := new(cloudflare.G1)
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_, errc = yc.Unmarshal(data[64:])
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yg := new(google.G1)
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_, errg = yg.Unmarshal(data[64:])
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if (errc == nil) != (errg == nil) {
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panic("parse mismatch")
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} else if errc != nil {
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return 0
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}
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// Add the two points and ensure they result in the same output
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rc := new(cloudflare.G1)
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rc.Add(xc, yc)
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rg := new(google.G1)
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rg.Add(xg, yg)
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if !bytes.Equal(rc.Marshal(), rg.Marshal()) {
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panic("add mismatch")
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}
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return 0
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}
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// FuzzMul fuzzez bn256 scalar multiplication between the Google and Cloudflare
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// libraries.
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func FuzzMul(data []byte) int {
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// Ensure we have enough data in the first place
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if len(data) != 96 {
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return 0
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}
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// Ensure both libs can parse the curve point
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pc := new(cloudflare.G1)
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_, errc := pc.Unmarshal(data[:64])
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pg := new(google.G1)
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_, errg := pg.Unmarshal(data[:64])
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if (errc == nil) != (errg == nil) {
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panic("parse mismatch")
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} else if errc != nil {
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return 0
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}
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// Add the two points and ensure they result in the same output
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rc := new(cloudflare.G1)
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rc.ScalarMult(pc, new(big.Int).SetBytes(data[64:]))
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rg := new(google.G1)
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rg.ScalarMult(pg, new(big.Int).SetBytes(data[64:]))
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if !bytes.Equal(rc.Marshal(), rg.Marshal()) {
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panic("scalar mul mismatch")
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}
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return 0
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}
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func FuzzPair(data []byte) int {
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// Ensure we have enough data in the first place
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if len(data) != 192 {
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return 0
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}
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// Ensure both libs can parse the curve point
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pc := new(cloudflare.G1)
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_, errc := pc.Unmarshal(data[:64])
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pg := new(google.G1)
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_, errg := pg.Unmarshal(data[:64])
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if (errc == nil) != (errg == nil) {
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panic("parse mismatch")
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} else if errc != nil {
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return 0
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}
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// Ensure both libs can parse the twist point
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tc := new(cloudflare.G2)
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_, errc = tc.Unmarshal(data[64:])
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tg := new(google.G2)
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_, errg = tg.Unmarshal(data[64:])
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if (errc == nil) != (errg == nil) {
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panic("parse mismatch")
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} else if errc != nil {
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return 0
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}
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// Pair the two points and ensure thet result in the same output
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if cloudflare.PairingCheck([]*cloudflare.G1{pc}, []*cloudflare.G2{tc}) != google.PairingCheck([]*google.G1{pg}, []*google.G2{tg}) {
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panic("pair mismatch")
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}
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return 0
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}
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