github.com/ethereum/go-ethereum@v1.14.3/tests/fuzzers/secp256k1/secp_test.go (about) 1 // Copyright 2021 The go-ethereum Authors 2 // This file is part of the go-ethereum library. 3 // 4 // The go-ethereum library is free software: you can redistribute it and/or modify 5 // it under the terms of the GNU Lesser General Public License as published by 6 // the Free Software Foundation, either version 3 of the License, or 7 // (at your option) any later version. 8 // 9 // The go-ethereum library is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU Lesser General Public License for more details. 13 // 14 // You should have received a copy of the GNU Lesser General Public License 15 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. 16 17 package secp256k1 18 19 import ( 20 "fmt" 21 "testing" 22 23 "github.com/btcsuite/btcd/btcec/v2" 24 "github.com/ethereum/go-ethereum/crypto/secp256k1" 25 ) 26 27 func TestFuzzer(t *testing.T) { 28 a, b := "00000000N0000000/R0000000000000000", "0U0000S0000000mkhP000000000000000U" 29 fuzz([]byte(a), []byte(b)) 30 } 31 32 func Fuzz(f *testing.F) { 33 f.Fuzz(func(t *testing.T, a, b []byte) { 34 fuzz(a, b) 35 }) 36 } 37 38 func fuzz(dataP1, dataP2 []byte) { 39 var ( 40 curveA = secp256k1.S256() 41 curveB = btcec.S256() 42 ) 43 // first point 44 x1, y1 := curveB.ScalarBaseMult(dataP1) 45 // second points 46 x2, y2 := curveB.ScalarBaseMult(dataP2) 47 resAX, resAY := curveA.Add(x1, y1, x2, y2) 48 resBX, resBY := curveB.Add(x1, y1, x2, y2) 49 if resAX.Cmp(resBX) != 0 || resAY.Cmp(resBY) != 0 { 50 fmt.Printf("%s %s %s %s\n", x1, y1, x2, y2) 51 panic(fmt.Sprintf("Addition failed: geth: %s %s btcd: %s %s", resAX, resAY, resBX, resBY)) 52 } 53 }