test/fuzzers: merge test/fuzz-stuff, small polishes

tests/fuzzers: simplify runtime-test

crypto/blake2b/blake2b_f_fuzz.go

@@ -1,55 +0,0 @@
-package blake2b
-
-import (
-	"encoding/binary"
-)
-
-func fuzz(data []byte) int {
-	// Make sure the data confirms to the input model
-	if len(data) != 211 {
-		return 0
-	}
-	// Parse everything and call all the implementations
-	var (
-		rounds = binary.BigEndian.Uint16(data[0:2])
-
-		h [8]uint64
-		m [16]uint64
-		t [2]uint64
-		f uint64
-	)
-	for i := 0; i < 8; i++ {
-		offset := 2 + i*8
-		h[i] = binary.LittleEndian.Uint64(data[offset : offset+8])
-	}
-	for i := 0; i < 16; i++ {
-		offset := 66 + i*8
-		m[i] = binary.LittleEndian.Uint64(data[offset : offset+8])
-	}
-	t[0] = binary.LittleEndian.Uint64(data[194:202])
-	t[1] = binary.LittleEndian.Uint64(data[202:210])
-
-	if data[210]%2 == 1 { // Avoid spinning the fuzzer to hit 0/1
-		f = 0xFFFFFFFFFFFFFFFF
-	}
-	// Run the blake2b compression on all instruction sets and cross reference
-	want := h
-	fGeneric(&want, &m, t[0], t[1], f, uint64(rounds))
-
-	have := h
-	fSSE4(&have, &m, t[0], t[1], f, uint64(rounds))
-	if have != want {
-		panic("SSE4 mismatches generic algo")
-	}
-	have = h
-	fAVX(&have, &m, t[0], t[1], f, uint64(rounds))
-	if have != want {
-		panic("AVX mismatches generic algo")
-	}
-	have = h
-	fAVX2(&have, &m, t[0], t[1], f, uint64(rounds))
-	if have != want {
-		panic("AVX2 mismatches generic algo")
-	}
-	return 1
-}

crypto/blake2b/blake2b_f_test.go

@@ -1,17 +1,12 @@
 package blake2b
 
 import (
+	"encoding/binary"
 	"fmt"
 	"reflect"
 	"testing"
 )
 
-func Fuzz(f *testing.F) {
-	f.Fuzz(func(t *testing.T, data []byte) {
-		fuzz(data)
-	})
-}
-
 func TestF(t *testing.T) {
 	for i, test := range testVectorsF {
 		t.Run(fmt.Sprintf("test vector %v", i), func(t *testing.T) {
@@ -63,3 +58,60 @@ var testVectorsF = []testVector{
 		},
 	},
 }
+
+func Fuzz(f *testing.F) {
+	f.Fuzz(func(t *testing.T, data []byte) {
+		fuzz(data)
+	})
+}
+
+func fuzz(data []byte) {
+	// Make sure the data confirms to the input model
+	if len(data) != 211 {
+		return
+	}
+	// Parse everything and call all the implementations
+	var (
+		rounds = binary.BigEndian.Uint16(data[0:2])
+
+		h [8]uint64
+		m [16]uint64
+		t [2]uint64
+		f uint64
+	)
+
+	for i := 0; i < 8; i++ {
+		offset := 2 + i*8
+		h[i] = binary.LittleEndian.Uint64(data[offset : offset+8])
+	}
+	for i := 0; i < 16; i++ {
+		offset := 66 + i*8
+		m[i] = binary.LittleEndian.Uint64(data[offset : offset+8])
+	}
+	t[0] = binary.LittleEndian.Uint64(data[194:202])
+	t[1] = binary.LittleEndian.Uint64(data[202:210])
+
+	if data[210]%2 == 1 { // Avoid spinning the fuzzer to hit 0/1
+		f = 0xFFFFFFFFFFFFFFFF
+	}
+
+	// Run the blake2b compression on all instruction sets and cross reference
+	want := h
+	fGeneric(&want, &m, t[0], t[1], f, uint64(rounds))
+
+	have := h
+	fSSE4(&have, &m, t[0], t[1], f, uint64(rounds))
+	if have != want {
+		panic("SSE4 mismatches generic algo")
+	}
+	have = h
+	fAVX(&have, &m, t[0], t[1], f, uint64(rounds))
+	if have != want {
+		panic("AVX mismatches generic algo")
+	}
+	have = h
+	fAVX2(&have, &m, t[0], t[1], f, uint64(rounds))
+	if have != want {
+		panic("AVX2 mismatches generic algo")
+	}
+}

tests/fuzzers/bitutil/compress_fuzz.go

@@ -22,7 +22,7 @@ import (
 	"github.com/ethereum/go-ethereum/common/bitutil"
 )
 
-// Fuzz implements a go-fuzz fuzzer method to test various encoding method
+// FuzzBitutil implements a go-fuzz fuzzer method to test various encoding method
 // invocations.
 func FuzzBitutil(data []byte) int {
 	if len(data) == 0 {

tests/fuzzers/runtime/runtime_fuzz.go

@@ -1,36 +0,0 @@
-// Copyright 2017 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package runtime
-
-import (
-	"github.com/ethereum/go-ethereum/core/vm/runtime"
-)
-
-// Fuzz is the basic entry point for the go-fuzz tool
-//
-// This returns 1 for valid parse:able/runnable code, 0
-// for invalid opcode.
-func fuzz(input []byte) int {
-	_, _, err := runtime.Execute(input, input, &runtime.Config{
-		GasLimit: 12000000,
-	})
-	// invalid opcode
-	if err != nil && len(err.Error()) > 6 && err.Error()[:7] == "invalid" {
-		return 0
-	}
-	return 1
-}

tests/fuzzers/runtime/runtime_test.go

@@ -16,10 +16,16 @@
 
 package runtime
 
-import "testing"
+import (
+	"testing"
+
+	"github.com/ethereum/go-ethereum/core/vm/runtime"
+)
 
 func Fuzz(f *testing.F) {
-	f.Fuzz(func(t *testing.T, data []byte) {
-		fuzz(data)
+	f.Fuzz(func(t *testing.T, code, input []byte) {
+		runtime.Execute(code, input, &runtime.Config{
+			GasLimit: 12000000,
+		})
 	})
 }

tests/fuzzers/secp256k1/secp_fuzzer.go

@@ -1,50 +0,0 @@
-// Copyright 2021 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-// build +gofuzz
-
-package secp256k1
-
-import (
-	"fmt"
-
-	"github.com/btcsuite/btcd/btcec/v2"
-	"github.com/ethereum/go-ethereum/crypto/secp256k1"
-	gofuzz "github.com/google/gofuzz"
-)
-
-func fuzz(input []byte) int {
-	var (
-		fuzzer = gofuzz.NewFromGoFuzz(input)
-		curveA = secp256k1.S256()
-		curveB = btcec.S256()
-		dataP1 []byte
-		dataP2 []byte
-	)
-	// first point
-	fuzzer.Fuzz(&dataP1)
-	x1, y1 := curveB.ScalarBaseMult(dataP1)
-	// second point
-	fuzzer.Fuzz(&dataP2)
-	x2, y2 := curveB.ScalarBaseMult(dataP2)
-	resAX, resAY := curveA.Add(x1, y1, x2, y2)
-	resBX, resBY := curveB.Add(x1, y1, x2, y2)
-	if resAX.Cmp(resBX) != 0 || resAY.Cmp(resBY) != 0 {
-		fmt.Printf("%s %s %s %s\n", x1, y1, x2, y2)
-		panic(fmt.Sprintf("Addition failed: geth: %s %s btcd: %s %s", resAX, resAY, resBX, resBY))
-	}
-	return 0
-}

tests/fuzzers/secp256k1/secp_test.go

@@ -16,15 +16,39 @@
 
 package secp256k1
 
-import "testing"
+import (
+	"fmt"
+	"testing"
+
+	"github.com/btcsuite/btcd/btcec/v2"
+	"github.com/ethereum/go-ethereum/crypto/secp256k1"
+)
 
 func TestFuzzer(t *testing.T) {
-	test := "00000000N0000000/R00000000000000000U0000S0000000mkhP000000000000000U"
-	fuzz([]byte(test))
+	a, b := "00000000N0000000/R0000000000000000", "0U0000S0000000mkhP000000000000000U"
+	fuzz([]byte(a), []byte(b))
 }
 
 func Fuzz(f *testing.F) {
-	f.Fuzz(func(t *testing.T, data []byte) {
-		fuzz(data)
+	f.Fuzz(func(t *testing.T, a, b []byte) {
+		fuzz(a, b)
 	})
 }
+
+func fuzz(dataP1, dataP2 []byte) int {
+	var (
+		curveA = secp256k1.S256()
+		curveB = btcec.S256()
+	)
+	// first point
+	x1, y1 := curveB.ScalarBaseMult(dataP1)
+	// second points
+	x2, y2 := curveB.ScalarBaseMult(dataP2)
+	resAX, resAY := curveA.Add(x1, y1, x2, y2)
+	resBX, resBY := curveB.Add(x1, y1, x2, y2)
+	if resAX.Cmp(resBX) != 0 || resAY.Cmp(resBY) != 0 {
+		fmt.Printf("%s %s %s %s\n", x1, y1, x2, y2)
+		panic(fmt.Sprintf("Addition failed: geth: %s %s btcd: %s %s", resAX, resAY, resBX, resBY))
+	}
+	return 0
+}