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tests/fuzzers: simplify bitutil fuzzer

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Martin Holst Swende 2023-10-18 09:53:04 +02:00
parent 28876bb9a6
commit e4cd592f77
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3 changed files with 47 additions and 74 deletions
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3
oss-fuzz.sh
View file

@ -92,7 +92,8 @@ function compile_fuzzer() {
cd -
}
compile_fuzzer tests/fuzzers/bitutil Fuzz fuzzBitutilCompress
compile_fuzzer tests/fuzzers/bitutil FuzzEncoder fuzzBitutilEncoder
compile_fuzzer tests/fuzzers/bitutil FuzzDecoder fuzzBitutilDecoder
compile_fuzzer tests/fuzzers/bn256 FuzzAdd fuzzBn256Add
compile_fuzzer tests/fuzzers/bn256 FuzzMul fuzzBn256Mul
compile_fuzzer tests/fuzzers/bn256 FuzzPair fuzzBn256Pair

70
tests/fuzzers/bitutil/compress_fuzz.go
View file

@ -1,70 +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 bitutil
import (
"bytes"
"github.com/ethereum/go-ethereum/common/bitutil"
)
// FuzzBitutil implements a go-fuzz fuzzer method to test various encoding method
// invocations.
func FuzzBitutil(data []byte) int {
if len(data) == 0 {
return 0
}
if data[0]%2 == 0 {
return fuzzEncode(data[1:])
}
return fuzzDecode(data[1:])
}
// fuzzEncode implements a go-fuzz fuzzer method to test the bitset encoding and
// decoding algorithm.
func fuzzEncode(data []byte) int {
proc, _ := bitutil.DecompressBytes(bitutil.CompressBytes(data), len(data))
if !bytes.Equal(data, proc) {
panic("content mismatch")
}
return 1
}
// fuzzDecode implements a go-fuzz fuzzer method to test the bit decoding and
// reencoding algorithm.
func fuzzDecode(data []byte) int {
blob, err := bitutil.DecompressBytes(data, 1024)
if err != nil {
return 0
}
// re-compress it (it's OK if the re-compressed differs from the
// original - the first input may not have been compressed at all)
comp := bitutil.CompressBytes(blob)
if len(comp) > len(blob) {
// After compression, it must be smaller or equal
panic("bad compression")
}
// But decompressing it once again should work
decomp, err := bitutil.DecompressBytes(data, 1024)
if err != nil {
panic(err)
}
if !bytes.Equal(decomp, blob) {
panic("content mismatch")
}
return 1
}

48
tests/fuzzers/bitutil/compress_test.go
View file

@ -16,10 +16,52 @@
package bitutil
import "testing"
import (
"testing"
func Fuzz(f *testing.F) {
"github.com/ethereum/go-ethereum/common/bitutil"
)
func FuzzEncoder(f *testing.F) {
f.Fuzz(func(t *testing.T, data []byte) {
FuzzBitutil(data)
fuzzEncode(data)
})
}
func FuzzDecoder(f *testing.F) {
f.Fuzz(func(t *testing.T, data []byte) {
fuzzDecode(data)
})
}
// fuzzEncode implements a go-fuzz fuzzer method to test the bitset encoding and
// decoding algorithm.
func fuzzEncode(data []byte) {
proc, _ := bitutil.DecompressBytes(bitutil.CompressBytes(data), len(data))
if !bytes.Equal(data, proc) {
panic("content mismatch")
}
}
// fuzzDecode implements a go-fuzz fuzzer method to test the bit decoding and
// reencoding algorithm.
func fuzzDecode(data []byte) {
blob, err := bitutil.DecompressBytes(data, 1024)
if err != nil {
return
}
// re-compress it (it's OK if the re-compressed differs from the
// original - the first input may not have been compressed at all)
comp := bitutil.CompressBytes(blob)
if len(comp) > len(blob) {
// After compression, it must be smaller or equal
panic("bad compression")
}
// But decompressing it once again should work
decomp, err := bitutil.DecompressBytes(data, 1024)
if err != nil {
panic(err)
}
if !bytes.Equal(decomp, blob) {
panic("content mismatch")
}
}